Fix the setSize typo (#1198)

* fix typos and add minor details to the docs

* fix the issue #1175 & fix a typo

* fix the issue #1168 & fix a typo

* fix a typo in PR template

* check result data for null in the onPictureResult() callback

* revert unnecessary changes

* improve log message

Co-authored-by: Dmitry Naymushin <d.naymushin@tinkoff.ru>

.github/ISSUE_TEMPLATE/bug_report.md

@@ -13,11 +13,12 @@ Please add a clear description of what the bug is, **and** fill the list below.
 - Camera engine used: *camera1/camera2/both*
 - Reproducible in official demo app: *yes/no*
 - Device / Android version: *Pixel, API 28*
+- I have read the [FAQ page](https://natario1.github.io/CameraView/about/faq): *yes/no*
 
 ### To Reproduce
 Steps to reproduce the behavior, possibly in the demo app:
 1. Go to '...'
-2. Click on '....'
+2. Click on '...'
 3. See error
 
 ### Expected behavior

.github/ISSUE_TEMPLATE/question.md

@@ -8,7 +8,7 @@ assignees: ''
 ---
 
 ### How do I?
-Describe your problem here. Please, read the docs first.
+Describe your problem here. Please, read the [docs](https://natario1.github.io/CameraView) and [FAQ page](https://natario1.github.io/CameraView/about/faq) first.
 Questions not strictly related to CameraView should be asked elsewhere.
 
 ### Version used

.github/pull_request_template.md

@@ -1,10 +1,14 @@
 ### Before you go
-Unless this is a simple fix (typos, bugs with obvious solution), please open an issue first.
+Unless this is a simple fix (typos, bugs with obvious solution), please open an issue first so that
-If the edited files were covered by tests, updated tests are required for merging. Please look into the tests folders and make sure you cover new code.
+we can discuss the best approach to address the problem. Without a reference issue and discussion, 
+unfortunately, this PR will likely be ignored.
 
-- Fixes ... (*issue number*)
+If the edited files were covered by tests, updated tests are required for merging. 
+Please look into the tests folders and make sure you cover new code.
+
+- Fixes: ... (*issue number*)
 - Tests: ... (*yes/no*)
 - Docs updated: ... (*yes/no*)
 
 ### Solution
-If applicable, briefly describe how the issue was addressed.
+If applicable, describe briefly how the issue was addressed.

.github/workflows/build.yml

@@ -4,39 +4,41 @@ name: Build
 on:
   push:
     branches:
-      - master
+      - main
   pull_request:
-env:
-  TRAVIS: true
 jobs:
   ANDROID_BASE_CHECKS:
     name: Base Checks
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - uses: actions/setup-java@v1
+      - uses: actions/setup-java@v2
         with:
-          java-version: 1.8
+          java-version: 11
+          distribution: temurin
+          cache: gradle
       - name: Perform base checks
-        run: ./gradlew demo:assembleDebug cameraview:javadoc
+        run: ./gradlew demo:assembleDebug cameraview:publishToDirectory --stacktrace
   ANDROID_UNIT_TESTS:
     name: Unit Tests
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - uses: actions/setup-java@v1
+      - uses: actions/setup-java@v2
         with:
-          java-version: 1.8
+          java-version: 11
+          distribution: temurin
+          cache: gradle
       - name: Execute unit tests
-        run: ./gradlew cameraview:testDebugUnitTest
+        run: ./gradlew cameraview:runUnitTests --stacktrace
       - name: Upload unit tests artifact
         uses: actions/upload-artifact@v1
         with:
           name: unit_tests
-          path: ./cameraview/build/jacoco/
+          path: ./cameraview/build/coverage_input/unit_tests
   ANDROID_EMULATOR_TESTS:
     name: Emulator Tests
-    runs-on: macOS-latest
+    runs-on: macos-latest
     strategy:
       fail-fast: false
       matrix:
@@ -60,56 +62,58 @@ jobs:
             EMULATOR_ARCH: x86
     steps:
       - uses: actions/checkout@v2
-      - uses: actions/setup-java@v1
+      - uses: actions/setup-java@v2
         with:
-          java-version: 1.8
+          java-version: 11
+          distribution: temurin
+          cache: gradle
       - name: Execute emulator tests
         timeout-minutes: 30
-        uses: reactivecircus/android-emulator-runner@v2.2.0
+        uses: reactivecircus/android-emulator-runner@v2.21.0
         with:
           api-level: ${{ matrix.EMULATOR_API }}
           arch: ${{ matrix.EMULATOR_ARCH }}
           disable-animations: true
           profile: Nexus 5X
           emulator-options: -no-snapshot -no-window -no-boot-anim -camera-back emulated -camera-front emulated -gpu swiftshader_indirect
-          emulator-build: 6110076
           script: ./.github/workflows/emulator_script.sh
       - name: Upload emulator tests artifact
         uses: actions/upload-artifact@v1
         with:
           name: emulator_tests_${{ matrix.EMULATOR_API }}
-          path: ./cameraview/build/outputs/code_coverage/debugAndroidTest/connected
+          path: ./cameraview/build/coverage_input/android_tests
   CODE_COVERAGE:
     name: Code Coverage Report
     runs-on: ubuntu-latest
     needs: [ANDROID_UNIT_TESTS, ANDROID_EMULATOR_TESTS]
     steps:
       - uses: actions/checkout@v2
-      - uses: actions/setup-java@v1
+      - uses: actions/setup-java@v2
         with:
-          java-version: 1.8
+          java-version: 11
+          distribution: temurin
+          cache: gradle
       - name: Download unit tests artifact
         uses: actions/download-artifact@v1
         with:
           name: unit_tests
-          path: ./cameraview/build/jacoco/
+          path: ./cameraview/build/coverage_input/unit_tests
       - name: Download emulator tests artifact
         uses: actions/download-artifact@v1
         with:
           # 27 is the EMULATOR_API with less SdkExclude annotations, and should have
           # the best possible coverage.
           name: emulator_tests_27
-          path: ./cameraview/build/outputs/code_coverage/debugAndroidTest/connected
+          path: ./cameraview/build/coverage_input/android_tests
       - name: Create merged coverage report
-        run: ./gradlew cameraview:mergeCoverageReports
+        run: ./gradlew cameraview:computeCoverage
       - name: Upload merged coverage report (GitHub)
         uses: actions/upload-artifact@v1
         with:
           name: report
-          path: ./cameraview/build/reports/mergedCoverageReport
+          path: ./cameraview/build/coverage_output/xml
       - name: Upload merged coverage report (Codecov)
         uses: codecov/codecov-action@v1
         with:
-          token: ${{ secrets.CODECOV_KEY }}
+          file: ./cameraview/build/coverage_output/xml/*
-          file: ./cameraview/build/reports/mergedCoverageReport/*
           fail_ci_if_error: true

.github/workflows/deploy.yml

@@ -4,17 +4,20 @@ on:
   release:
     types: [published]
 jobs:
-  BINTRAY_UPLOAD:
+  MAVEN_UPLOAD:
-    name: Bintray Upload
+    name: Maven Upload
     runs-on: ubuntu-latest
     env:
-      TRAVIS: true
+      SIGNING_KEY: ${{ secrets.SIGNING_KEY }}
-      BINTRAY_USER: ${{ secrets.BINTRAY_USER }}
+      SIGNING_PASSWORD: ${{ secrets.SIGNING_PASSWORD }}
-      BINTRAY_KEY: ${{ secrets.BINTRAY_KEY }}
+      SONATYPE_USER: ${{ secrets.SONATYPE_USER }}
+      SONATYPE_PASSWORD: ${{ secrets.SONATYPE_PASSWORD }}
     steps:
       - uses: actions/checkout@v2
-      - uses: actions/setup-java@v1
+      - uses: actions/setup-java@v2
         with:
-          java-version: 1.8
+          java-version: 11
-      - name: Perform bintray upload
+          distribution: temurin
-        run: ./gradlew bintrayUpload
+          cache: gradle
+      - name: Perform maven upload
+        run: ./gradlew publishToSonatype

.github/workflows/emulator_script.sh

@@ -11,4 +11,4 @@ ADB_TAGS="$ADB_TAGS MediaEncoderEngine:I MediaEncoder:I AudioMediaEncoder:I Vide
 ADB_TAGS="$ADB_TAGS CameraIntegrationTest:I MessageQueue:W MPEG4Writer:I"
 adb logcat -c
 adb logcat $ADB_TAGS *:E -v color &
-./gradlew cameraview:connectedCheck
+./gradlew cameraview:runAndroidTests

.github/workflows/snapshot.yml

@@ -0,0 +1,25 @@
+# https://help.github.com/en/actions/automating-your-workflow-with-github-actions/workflow-syntax-for-github-actions
+# Renaming ? Change the README badge.
+name: Snapshot
+on:
+  push:
+    branches:
+      - main
+jobs:
+  SNAPSHOT:
+    name: Publish Snapshot
+    runs-on: ubuntu-latest
+    env:
+      SIGNING_KEY: ${{ secrets.SIGNING_KEY }}
+      SIGNING_PASSWORD: ${{ secrets.SIGNING_PASSWORD }}
+      SONATYPE_USER: ${{ secrets.SONATYPE_USER }}
+      SONATYPE_PASSWORD: ${{ secrets.SONATYPE_PASSWORD }}
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-java@v2
+        with:
+          java-version: 11
+          distribution: temurin
+          cache: gradle
+      - name: Publish sonatype snapshot
+        run: ./gradlew publishToSonatypeSnapshot

.run/runAndroidTests.run.xml

@@ -0,0 +1,23 @@
+<component name="ProjectRunConfigurationManager">
+  <configuration default="false" name="runAndroidTests" type="GradleRunConfiguration" factoryName="Gradle">
+    <ExternalSystemSettings>
+      <option name="executionName" />
+      <option name="externalProjectPath" value="$PROJECT_DIR$/cameraview" />
+      <option name="externalSystemIdString" value="GRADLE" />
+      <option name="scriptParameters" value="" />
+      <option name="taskDescriptions">
+        <list />
+      </option>
+      <option name="taskNames">
+        <list>
+          <option value="runAndroidTests" />
+        </list>
+      </option>
+      <option name="vmOptions" value="" />
+    </ExternalSystemSettings>
+    <ExternalSystemDebugServerProcess>false</ExternalSystemDebugServerProcess>
+    <ExternalSystemReattachDebugProcess>true</ExternalSystemReattachDebugProcess>
+    <DebugAllEnabled>false</DebugAllEnabled>
+    <method v="2" />
+  </configuration>
+</component>

.run/runUnitTests.run.xml

@@ -0,0 +1,23 @@
+<component name="ProjectRunConfigurationManager">
+  <configuration default="false" name="runUnitTests" type="GradleRunConfiguration" factoryName="Gradle">
+    <ExternalSystemSettings>
+      <option name="executionName" />
+      <option name="externalProjectPath" value="$PROJECT_DIR$/cameraview" />
+      <option name="externalSystemIdString" value="GRADLE" />
+      <option name="scriptParameters" value="" />
+      <option name="taskDescriptions">
+        <list />
+      </option>
+      <option name="taskNames">
+        <list>
+          <option value="runUnitTests" />
+        </list>
+      </option>
+      <option name="vmOptions" value="" />
+    </ExternalSystemSettings>
+    <ExternalSystemDebugServerProcess>false</ExternalSystemDebugServerProcess>
+    <ExternalSystemReattachDebugProcess>true</ExternalSystemReattachDebugProcess>
+    <DebugAllEnabled>false</DebugAllEnabled>
+    <method v="2" />
+  </configuration>
+</component>

LICENSE

@@ -1,7 +1,7 @@
 Copyrights for portions of project CameraView are held by WonderKiln, Inc as
 part of project CameraKit-Android (https://github.com/wonderkiln/CameraKit-Android).
 Their original license is available below, or at
-https://github.com/wonderkiln/CameraKit-Android/blob/master/LICENSE .
+https://github.com/wonderkiln/CameraKit-Android/blob/main/LICENSE .
 All other copyrights for project CameraView are held by Otalia Studios, 2017.
 
 ------------------------------------------------------------------------------

README.md

@@ -1,5 +1,5 @@
 [![Build Status](https://github.com/natario1/CameraView/workflows/Build/badge.svg?event=push)](https://github.com/natario1/CameraView/actions)
-[![Code Coverage](https://codecov.io/gh/natario1/CameraView/branch/master/graph/badge.svg)](https://codecov.io/gh/natario1/CameraView)
+[![Code Coverage](https://codecov.io/gh/natario1/CameraView/branch/main/graph/badge.svg)](https://codecov.io/gh/natario1/CameraView)
 [![Release](https://img.shields.io/github/release/natario1/CameraView.svg)](https://github.com/natario1/CameraView/releases)
 [![Issues](https://img.shields.io/github/issues-raw/natario1/CameraView.svg)](https://github.com/natario1/CameraView/issues)
 [![Funding](https://img.shields.io/opencollective/all/CameraView.svg?colorB=r)](https://natario1.github.io/CameraView/extra/donate)
@@ -22,7 +22,7 @@ CameraView is a well documented, high-level library that makes capturing picture
 addressing most of the common issues and needs, and still leaving you with flexibility where needed.
 
 ```groovy
-api 'com.otaliastudios:cameraview:2.6.1'
+api 'com.otaliastudios:cameraview:2.7.2'
 ```
 
 - Fast & reliable

build.gradle

@@ -1,30 +0,0 @@
-buildscript {
-    repositories {
-        jcenter()
-        google()
-    }
-
-    dependencies {
-        classpath 'com.android.tools.build:gradle:3.5.3'
-        classpath 'com.github.dcendents:android-maven-gradle-plugin:2.1'
-        classpath 'com.jfrog.bintray.gradle:gradle-bintray-plugin:1.8.4'
-    }
-}
-
-allprojects {
-    repositories {
-        jcenter()
-        google()
-        maven { url 'https://jitpack.io' }
-    }
-}
-
-ext {
-    compileSdkVersion = 29
-    minSdkVersion = 15
-    targetSdkVersion = 29
-}
-
-task clean(type: Delete) {
-    delete rootProject.buildDir
-}

build.gradle.kts

@@ -0,0 +1,30 @@
+
+buildscript {
+
+    extra["minSdkVersion"] = 15
+    extra["compileSdkVersion"] = 31
+    extra["targetSdkVersion"] = 31
+
+    repositories {
+        google()
+        mavenCentral()
+    }
+
+    dependencies {
+        classpath("com.android.tools.build:gradle:7.0.3")
+        classpath("io.deepmedia.tools:publisher:0.6.0")
+        classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:1.5.31")
+
+    }
+}
+
+allprojects {
+    repositories {
+        google()
+        mavenCentral()
+    }
+}
+
+tasks.register("clean", Delete::class) {
+    delete(buildDir)
+}

cameraview/build.gradle

@@ -1,276 +0,0 @@
-apply plugin: 'com.android.library'
-apply plugin: 'com.github.dcendents.android-maven'
-apply plugin: 'com.jfrog.bintray'
-
-// Required by bintray
-version = '2.6.1'
-group = 'com.otaliastudios'
-
-//region android dependencies
-
-android {
-    compileSdkVersion rootProject.ext.compileSdkVersion
-
-    defaultConfig {
-        minSdkVersion rootProject.ext.minSdkVersion
-        targetSdkVersion rootProject.ext.targetSdkVersion
-        versionCode 1
-        versionName project.version
-        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
-        testInstrumentationRunnerArgument "filter", "" +
-                "com.otaliastudios.cameraview.tools.SdkExcludeFilter," +
-                "com.otaliastudios.cameraview.tools.SdkIncludeFilter"
-    }
-
-    buildTypes {
-        debug {
-            testCoverageEnabled true
-        }
-
-        release {
-            minifyEnabled false
-            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
-        }
-    }
-}
-
-dependencies {
-    testImplementation 'junit:junit:4.12'
-    testImplementation 'org.mockito:mockito-inline:2.28.2'
-
-    androidTestImplementation 'androidx.test:runner:1.2.0'
-    androidTestImplementation 'androidx.test:rules:1.2.0'
-    androidTestImplementation 'androidx.test.ext:junit:1.1.1'
-    androidTestImplementation 'org.mockito:mockito-android:2.28.2'
-    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
-
-    api 'androidx.exifinterface:exifinterface:1.1.0'
-    api 'androidx.lifecycle:lifecycle-common:2.1.0'
-    api 'com.google.android.gms:play-services-tasks:17.0.0'
-    implementation 'androidx.annotation:annotation:1.1.0'
-
-    api 'com.github.natario1:Egloo:refactor-SNAPSHOT'
-}
-
-configurations.all {
-    resolutionStrategy.cacheChangingModulesFor 0, 'seconds'
-}
-
-//endregion
-
-//region bintray
-
-// install is a task defined by the Gradle Maven plugin, which is used to
-// publish a maven repo to a local repository. (we actually use the android version of the plugin,
-// com.github.dcendents.android-maven, to support AARs)
-// https://docs.gradle.org/current/userguide/maven_plugin.html#sec:maven_tasks
-install {
-    // The repositories property is common to all tasks of type Upload and returns the repositories
-    // into which we will upload data. https://docs.gradle.org/current/dsl/org.gradle.api.tasks.Upload.html#org.gradle.api.tasks.Upload:repositories
-    // It returns a RepositoryHandler: https://docs.gradle.org/current/dsl/org.gradle.api.artifacts.dsl.RepositoryHandler.html
-    repositories {
-        // The maven plugin adds a mavenInstaller property to the RepositoryHandler which can be used to
-        // add and configure a local maven repository cache.
-        // https://docs.gradle.org/current/dsl/org.gradle.api.artifacts.dsl.RepositoryHandler.html#N11785
-        mavenInstaller {
-            // The object here extends PomFilterContainer so we can configure the pom file here.
-            // https://docs.gradle.org/current/javadoc/org/gradle/api/artifacts/maven/PomFilterContainer.html#pom-groovy.lang.Closure-
-            pom {
-                // Now we are inside a MavenPom object that can be configured. We get the project and configure.
-                // https://docs.gradle.org/current/javadoc/org/gradle/api/artifacts/maven/MavenPom.html
-                project {
-                    name 'CameraView'
-                    description 'A well documented, high-level Android interface that makes capturing pictures ' +
-                            'and videos easy, addressing most of the common issues and needs.'
-                    url 'https://github.com/natario1/CameraView'
-                    packaging 'aar'
-                    groupId project.group
-                    artifactId 'cameraview'
-                    version project.version
-                    licenses {
-                        license {
-                            name 'The Apache Software License, Version 2.0'
-                            url 'http://www.apache.org/licenses/LICENSE-2.0.txt'
-                        }
-                    }
-                    scm {
-                        connection 'https://github.com/natario1/CameraView.git'
-                        developerConnection 'https://github.com/natario1/CameraView.git'
-                        url 'https://github.com/natario1/CameraView'
-
-                    }
-                    developers {
-                        developer {
-                            id = 'natario'
-                            name 'Mattia Iavarone'
-                        }
-                    }
-                }
-            }
-        }
-    }
-}
-
-def bintrayUser
-def bintrayKey
-def isCI = System.getenv("TRAVIS")
-if (isCI) {
-    bintrayUser = System.getenv("BINTRAY_USER")
-    bintrayKey = System.getenv("BINTRAY_KEY")
-} else {
-    Properties props = new Properties()
-    props.load(project.rootProject.file('local.properties').newDataInputStream())
-    bintrayUser = props.getProperty('bintray.user')
-    bintrayKey = props.get('bintray.key')
-}
-
-bintray {
-    // https://github.com/bintray/gradle-bintray-plugin
-    user = bintrayUser
-    key = bintrayKey
-    configurations = ['archives']
-    pkg {
-        repo = 'android'
-        name = 'CameraView'
-        licenses = ['Apache-2.0']
-        vcsUrl = 'https://github.com/natario1/CameraView.git'
-        publish = true
-        override = true
-        version {
-            name = project.version
-            desc = 'CameraView v. '+project.version
-            released = new Date()
-            vcsTag = 'v'+project.version
-        }
-    }
-}
-
-//endregion
-
-//region javadoc and sources
-
-// From official sample https://github.com/bintray/bintray-examples/blob/master/gradle-aar-example/build.gradle
-task sourcesJar(type: Jar) {
-    archiveClassifier.set('sources')
-    from android.sourceSets.main.java.sourceFiles
-}
-
-task javadoc(type: Javadoc) {
-    source = android.sourceSets.main.java.srcDirs
-    classpath += project.files(android.getBootClasspath().join(File.pathSeparator))
-    classpath += project.files("${android.sdkDirectory}/platforms/${android.compileSdkVersion}/android.jar")
-    project.android.libraryVariants.all { variant ->
-        if (variant.name == 'release') {
-            classpath += files(variant.javaCompile.classpath)
-        }
-    }
-    exclude '**/BuildConfig.java'
-    exclude '**/R.java'
-    // This excludes our internal folder, which is nice, but also creates
-    // errors anytime we reference excluded classes in public classes javadocs,
-    // which is unfortunate. There might be a fix but I don't know any.
-    // exclude '**/internal/**'
-}
-
-task javadocJar(type: Jar, dependsOn: javadoc) {
-    archiveClassifier.set('javadoc')
-    from javadoc.destinationDir
-}
-
-artifacts {
-    archives javadocJar
-    archives sourcesJar
-}
-
-//endregion
-
-//region code coverage
-
-// 1. running androidTests with connectedCheck will generate an .ec file
-// in build/outputs/code-coverage/connected, plus the XML result in
-// in build/reports/coverage/debug/report.xml .
-
-// 2. running unit tests with testDebugUnitTest will just generate the .exec file.
-// The JacocoReport task from the jacoco plugin can create the XML report out of it.
-
-// to have a unified report, we just pass both the .exec and the .ec file
-// to the jacoco task, so we get a unified XML report with total coverage.
-// Reference: https://medium.com/@rafael_toledo/setting-up-an-unified-coverage-report-in-android-with-jacoco-robolectric-and-espresso-ffe239aaf3fa
-
-apply plugin: 'jacoco'
-
-def reportsDirectory = "$buildDir/reports/"
-jacoco {
-    toolVersion = "0.8.1"
-    reportsDir = file(reportsDirectory)
-}
-
-task createCoverageReports() {
-    dependsOn "testDebugUnitTest"
-    dependsOn "connectedCheck"
-}
-
-task mergeCoverageReports(type: JacocoReport) {
-    // Let this be called without running the tests.
-    // dependsOn "createCoverageReports"
-    // However, ensure we have the compiled .class files.
-    dependsOn "compileDebugSources"
-
-    // Merge unit tests and android tests data
-    executionData = fileTree(dir: "$buildDir", includes: [
-            "jacoco/testDebugUnitTest.exec", // Unit tests
-            "outputs/code_coverage/debugAndroidTest/connected/*coverage.ec" // Android tests
-    ])
-
-    // Sources
-    sourceDirectories = files(android.sourceSets.main.java.sourceFiles)
-    additionalSourceDirs = files([ // Add BuildConfig and R.
-            "$buildDir/generated/source/buildConfig/debug",
-            "$buildDir/generated/source/r/debug"
-    ])
-
-    // Classes (.class files)
-    // Not everything in the filter relates to CameraView,
-    // but let's keep a generic filter
-    def classDir = "$buildDir/intermediates/javac/debug"
-    def classFilter = [
-            '**/R.class',
-            '**/R$*.class',
-            '**/BuildConfig.*',
-            '**/Manifest*.*',
-            'android/**',
-            'androidx/**',
-            'com/google/**',
-            '**/*$ViewInjector*.*',
-            '**/Dagger*Component.class',
-            '**/Dagger*Component$Builder.class',
-            '**/*Module_*Factory.class',
-    ]
-    if (isCI) {
-        // All these classes are tested by the integration tests that we are not able to
-        // run on the CI emulator.
-        // classFilter.add('**/com/otaliastudios/cameraview/engine/CameraEngine**.*')
-        // classFilter.add('**/com/otaliastudios/cameraview/engine/Camera1Engine**.*')
-        // classFilter.add('**/com/otaliastudios/cameraview/engine/Camera2Engine**.*')
-        // classFilter.add('**/com/otaliastudios/cameraview/engine/action/**.*')
-        // classFilter.add('**/com/otaliastudios/cameraview/engine/lock/**.*')
-        // classFilter.add('**/com/otaliastudios/cameraview/engine/meter/**.*')
-        // classFilter.add('**/com/otaliastudios/cameraview/picture/**.*')
-        // classFilter.add('**/com/otaliastudios/cameraview/video/**.*')
-        // classFilter.add('**/com/otaliastudios/cameraview/orchestrator/**.*')
-        // classFilter.add('**/com/otaliastudios/cameraview/video/encoding/**.*')
-    }
-    // We don't test OpenGL filters.
-    classFilter.add('**/com/otaliastudios/cameraview/filters/**.*')
-
-    classDirectories = fileTree(dir: classDir, excludes: classFilter);
-
-    reports.html.enabled = true
-    reports.xml.enabled = true
-    reports.xml.destination file("$reportsDirectory/mergedCoverageReport/report.xml")
-}
-
-//endregion
-
-// To deploy ./gradlew bintrayUpload
-

cameraview/build.gradle.kts

@@ -0,0 +1,137 @@
+import io.deepmedia.tools.publisher.common.License
+import io.deepmedia.tools.publisher.common.Release
+import io.deepmedia.tools.publisher.common.GithubScm
+
+plugins {
+    id("com.android.library")
+    id("kotlin-android")
+    id("io.deepmedia.tools.publisher")
+    id("jacoco")
+}
+
+android {
+    compileSdk = property("compileSdkVersion") as Int
+    defaultConfig {
+        minSdk = property("minSdkVersion") as Int
+        targetSdk = property("targetSdkVersion") as Int
+        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+        testInstrumentationRunnerArguments["filter"] = "" +
+                "com.otaliastudios.cameraview.tools.SdkExcludeFilter," +
+                "com.otaliastudios.cameraview.tools.SdkIncludeFilter"
+    }
+    buildTypes["debug"].isTestCoverageEnabled = true
+    buildTypes["release"].isMinifyEnabled = false
+}
+
+dependencies {
+    testImplementation("junit:junit:4.13.1")
+    testImplementation("org.mockito:mockito-inline:2.28.2")
+
+    androidTestImplementation("androidx.test:runner:1.4.0")
+    androidTestImplementation("androidx.test:rules:1.4.0")
+    androidTestImplementation("androidx.test.ext:junit:1.1.3")
+    androidTestImplementation("org.mockito:mockito-android:2.28.2")
+    androidTestImplementation("androidx.test.espresso:espresso-core:3.4.0")
+
+    api("androidx.exifinterface:exifinterface:1.3.3")
+    api("androidx.lifecycle:lifecycle-common:2.3.1")
+    api("com.google.android.gms:play-services-tasks:17.2.1")
+    implementation("androidx.annotation:annotation:1.2.0")
+    implementation("com.otaliastudios.opengl:egloo:0.6.1")
+}
+
+// Publishing
+
+publisher {
+    project.description = "A well documented, high-level Android interface that makes capturing " +
+            "pictures and videos easy, addressing all of the common issues and needs. " +
+            "Real-time filters, gestures, watermarks, frame processing, RAW, output of any size."
+    project.artifact = "cameraview"
+    project.group = "com.otaliastudios"
+    project.url = "https://github.com/natario1/CameraView"
+    project.scm = GithubScm("natario1", "CameraView")
+    project.addLicense(License.APACHE_2_0)
+    project.addDeveloper("natario1", "mat.iavarone@gmail.com")
+    release.sources = Release.SOURCES_AUTO
+    release.docs = Release.DOCS_AUTO
+    release.version = "2.7.2"
+
+    directory()
+
+    sonatype {
+        auth.user = "SONATYPE_USER"
+        auth.password = "SONATYPE_PASSWORD"
+        signing.key = "SIGNING_KEY"
+        signing.password = "SIGNING_PASSWORD"
+    }
+
+    sonatype("snapshot") {
+        repository = io.deepmedia.tools.publisher.sonatype.Sonatype.OSSRH_SNAPSHOT_1
+        release.version = "latest-SNAPSHOT"
+        auth.user = "SONATYPE_USER"
+        auth.password = "SONATYPE_PASSWORD"
+        signing.key = "SIGNING_KEY"
+        signing.password = "SIGNING_PASSWORD"
+    }
+}
+
+// Code Coverage
+val buildDir = project.buildDir.absolutePath
+val coverageInputDir = "$buildDir/coverage_input" // changing? change github workflow
+val coverageOutputDir = "$buildDir/coverage_output" // changing? change github workflow
+
+// Run unit tests, with coverage enabled in the android { } configuration.
+// Output will be an .exec file in build/jacoco.
+tasks.register("runUnitTests") { // changing name? change github workflow
+    dependsOn("testDebugUnitTest")
+    doLast {
+        copy {
+            from("$buildDir/outputs/unit_test_code_coverage/debugUnitTest/testDebugUnitTest.exec")
+            into("$coverageInputDir/unit_tests") // changing? change github workflow
+        }
+    }
+}
+
+// Run android tests with coverage.
+tasks.register("runAndroidTests") { // changing name? change github workflow
+    dependsOn("connectedDebugAndroidTest")
+    doLast {
+        copy {
+            from("$buildDir/outputs/code_coverage/debugAndroidTest/connected")
+            include("*coverage.ec")
+            into("$coverageInputDir/android_tests") // changing? change github workflow
+        }
+    }
+}
+
+// Merge the two with a jacoco task.
+jacoco { toolVersion = "0.8.5" }
+tasks.register("computeCoverage", JacocoReport::class) {
+    dependsOn("compileDebugSources") // Compile sources, needed below
+    executionData.from(fileTree(coverageInputDir))
+    sourceDirectories.from(android.sourceSets["main"].java.srcDirs)
+    additionalSourceDirs.from("$buildDir/generated/source/buildConfig/debug")
+    additionalSourceDirs.from("$buildDir/generated/source/r/debug")
+    classDirectories.from(fileTree("$buildDir/intermediates/javac/debug") {
+        // Not everything here is relevant for CameraView, but let's keep it generic
+        exclude(
+                "**/R.class",
+                "**/R$*.class",
+                "**/BuildConfig.*",
+                "**/Manifest*.*",
+                "android/**",
+                "androidx/**",
+                "com/google/**",
+                "**/*\$ViewInjector*.*",
+                "**/Dagger*Component.class",
+                "**/Dagger*Component\$Builder.class",
+                "**/*Module_*Factory.class",
+                // We don"t test OpenGL filters.
+                "**/com/otaliastudios/cameraview/filters/**.*"
+        )
+    })
+    reports.html.required.set(true)
+    reports.xml.required.set(true)
+    reports.html.outputLocation.set(file("$coverageOutputDir/html"))
+    reports.xml.outputLocation.set(file("$coverageOutputDir/xml/report.xml"))
+}

cameraview/src/androidTest/java/com/otaliastudios/cameraview/CameraViewCallbacksTest.java

@@ -248,7 +248,13 @@ public class CameraViewCallbacksTest extends BaseTest {
         verify(listener, times(1)).onOrientationChanged(anyInt());
     }
 
-    // TODO: test onShutter, here or elsewhere
+    @Test
+    public void testOnShutter() {
+        doEndOp(op, true).when(listener).onPictureShutter();
+        camera.mCameraCallbacks.dispatchOnPictureShutter(true);
+        assertNotNull(op.await(DELAY));
+        verify(listener, times(1)).onPictureShutter();
+    }
 
     @Test
     public void testCameraError() {

cameraview/src/androidTest/java/com/otaliastudios/cameraview/CameraViewTest.java

@@ -19,6 +19,7 @@ import android.view.View;
 import android.view.ViewGroup;
 
 import com.otaliastudios.cameraview.controls.Audio;
+import com.otaliastudios.cameraview.controls.AudioCodec;
 import com.otaliastudios.cameraview.controls.ControlParser;
 import com.otaliastudios.cameraview.controls.Engine;
 import com.otaliastudios.cameraview.controls.Facing;
@@ -54,6 +55,7 @@ import com.otaliastudios.cameraview.preview.CameraPreview;
 import com.otaliastudios.cameraview.size.Size;
 import com.otaliastudios.cameraview.size.SizeSelector;
 import com.otaliastudios.cameraview.size.SizeSelectors;
+import com.otaliastudios.cameraview.tools.SdkExclude;
 
 import org.junit.After;
 import org.junit.Before;
@@ -165,6 +167,7 @@ public class CameraViewTest extends BaseTest {
         assertEquals(cameraView.getHdr(), controls.getHdr());
         assertEquals(cameraView.getAudio(), controls.getAudio());
         assertEquals(cameraView.getVideoCodec(), controls.getVideoCodec());
+        assertEquals(cameraView.getAudioCodec(), controls.getAudioCodec());
         assertEquals(cameraView.getPictureFormat(), controls.getPictureFormat());
         //noinspection SimplifiableJUnitAssertion
         assertEquals(cameraView.getLocation(), null);
@@ -214,6 +217,17 @@ public class CameraViewTest extends BaseTest {
         assertEquals(cameraView.getGestureAction(Gesture.PINCH), GestureAction.NONE);
     }
 
+    @Test
+    public void testGesture_enabled() {
+        // Ensure touch events are intercepted when at least one gesture is set
+        cameraView.mapGesture(Gesture.PINCH, GestureAction.ZOOM);
+        assertTrue(cameraView.onInterceptTouchEvent(null));
+
+        // Ensure touch events are NOT intercepted when no gestures are set
+        cameraView.clearGesture(Gesture.PINCH);
+        assertFalse(cameraView.onInterceptTouchEvent(null));
+    }
+
     @Test
     public void testGesture_enablingDisablingLayouts() {
         cameraView.clearGesture(Gesture.TAP);
@@ -773,6 +787,19 @@ public class CameraViewTest extends BaseTest {
         assertEquals(cameraView.get(Audio.class), Audio.STEREO);
     }
 
+    @Test
+    public void testAudioCodec() {
+        cameraView.set(AudioCodec.DEVICE_DEFAULT);
+        assertEquals(cameraView.get(AudioCodec.class), AudioCodec.DEVICE_DEFAULT);
+        cameraView.set(AudioCodec.AAC);
+        assertEquals(cameraView.get(AudioCodec.class), AudioCodec.AAC);
+        cameraView.set(AudioCodec.HE_AAC);
+        assertEquals(cameraView.get(AudioCodec.class), AudioCodec.HE_AAC);
+        cameraView.set(AudioCodec.AAC_ELD);
+        assertEquals(cameraView.get(AudioCodec.class), AudioCodec.AAC_ELD);
+    }
+
+
     @Test
     public void testVideoCodec() {
         cameraView.set(VideoCodec.H_263);
@@ -887,6 +914,14 @@ public class CameraViewTest extends BaseTest {
         cameraView.setFrameProcessingExecutors(0);
     }
 
+    @Test
+    public void testDrawHardwareOverlays() {
+        cameraView.setDrawHardwareOverlays(true);
+        assertTrue(cameraView.getDrawHardwareOverlays());
+        cameraView.setDrawHardwareOverlays(false);
+        assertFalse(cameraView.getDrawHardwareOverlays());
+    }
+
     //endregion
 
     //region Lists of listeners and processors
@@ -1009,6 +1044,8 @@ public class CameraViewTest extends BaseTest {
         verify(cameraView.mOverlayLayout, never()).generateLayoutParams(any(AttributeSet.class));
     }
 
+    // Broke in 31 for some reason, no time to investigate but looks like a spy() issue.
+    @SdkExclude(minSdkVersion = 31)
     @Test
     public void testOverlays_addOverlayView() {
         cameraView.mOverlayLayout = spy(cameraView.mOverlayLayout);
@@ -1033,6 +1070,8 @@ public class CameraViewTest extends BaseTest {
         verify(cameraView.mOverlayLayout, never()).addView(overlay, params);
     }
 
+    // Broke in 31 for some reason, no time to investigate but looks like a spy() issue.
+    @SdkExclude(minSdkVersion = 31)
     @Test
     public void testOverlays_removeOverlayView() {
         // First add one.

cameraview/src/androidTest/java/com/otaliastudios/cameraview/VideoResultTest.java

@@ -4,6 +4,7 @@ package com.otaliastudios.cameraview;
 import android.location.Location;
 
 import com.otaliastudios.cameraview.controls.Audio;
+import com.otaliastudios.cameraview.controls.AudioCodec;
 import com.otaliastudios.cameraview.controls.Facing;
 import com.otaliastudios.cameraview.controls.VideoCodec;
 import com.otaliastudios.cameraview.size.Size;
@@ -32,7 +33,8 @@ public class VideoResultTest extends BaseTest {
         File file = Mockito.mock(File.class);
         int rotation = 90;
         Size size = new Size(20, 120);
-        VideoCodec codec = VideoCodec.H_263;
+        VideoCodec videoCodec = VideoCodec.H_263;
+        AudioCodec audioCodec = AudioCodec.DEVICE_DEFAULT;
         Location location = Mockito.mock(Location.class);
         boolean isSnapshot = true;
         int maxDuration = 1234;
@@ -47,7 +49,8 @@ public class VideoResultTest extends BaseTest {
         stub.file = file;
         stub.rotation = rotation;
         stub.size = size;
-        stub.videoCodec = codec;
+        stub.videoCodec = videoCodec;
+        stub.audioCodec = audioCodec;
         stub.location = location;
         stub.isSnapshot = isSnapshot;
         stub.maxDuration = maxDuration;
@@ -63,7 +66,8 @@ public class VideoResultTest extends BaseTest {
         assertEquals(result.getFile(), file);
         assertEquals(result.getRotation(), rotation);
         assertEquals(result.getSize(), size);
-        assertEquals(result.getVideoCodec(), codec);
+        assertEquals(result.getVideoCodec(), videoCodec);
+        assertEquals(result.getAudioCodec(), audioCodec);
         assertEquals(result.getLocation(), location);
         assertEquals(result.isSnapshot(), isSnapshot);
         assertEquals(result.getMaxSize(), maxFileSize);
@@ -81,7 +85,8 @@ public class VideoResultTest extends BaseTest {
         FileDescriptor fileDescriptor = FileDescriptor.in;
         int rotation = 90;
         Size size = new Size(20, 120);
-        VideoCodec codec = VideoCodec.H_263;
+        VideoCodec videoCodec = VideoCodec.H_263;
+        AudioCodec audioCodec = AudioCodec.DEVICE_DEFAULT;
         Location location = Mockito.mock(Location.class);
         boolean isSnapshot = true;
         int maxDuration = 1234;
@@ -96,7 +101,8 @@ public class VideoResultTest extends BaseTest {
         stub.fileDescriptor = fileDescriptor;
         stub.rotation = rotation;
         stub.size = size;
-        stub.videoCodec = codec;
+        stub.videoCodec = videoCodec;
+        stub.audioCodec = audioCodec;
         stub.location = location;
         stub.isSnapshot = isSnapshot;
         stub.maxDuration = maxDuration;
@@ -112,7 +118,8 @@ public class VideoResultTest extends BaseTest {
         assertEquals(result.getFileDescriptor(), fileDescriptor);
         assertEquals(result.getRotation(), rotation);
         assertEquals(result.getSize(), size);
-        assertEquals(result.getVideoCodec(), codec);
+        assertEquals(result.getVideoCodec(), videoCodec);
+        assertEquals(result.getAudioCodec(), audioCodec);
         assertEquals(result.getLocation(), location);
         assertEquals(result.isSnapshot(), isSnapshot);
         assertEquals(result.getMaxSize(), maxFileSize);

cameraview/src/androidTest/java/com/otaliastudios/cameraview/engine/CameraIntegrationTest.java

@@ -1080,6 +1080,20 @@ public abstract class CameraIntegrationTest<E extends CameraBaseEngine> extends
         assert15Frames(processor);
     }
 
+    @Test
+    @Retry(emulatorOnly = true)
+    @SdkExclude(maxSdkVersion = 22, emulatorOnly = true)
+    public void testFrameProcessing_afterPicture() throws Exception {
+        FrameProcessor processor = mock(FrameProcessor.class);
+        camera.addFrameProcessor(processor);
+        openSync(true);
+
+        camera.takePicture();
+        waitForPictureResult(true);
+
+        assert15Frames(processor);
+    }
+
     @Test
     @Retry(emulatorOnly = true)
     @SdkExclude(maxSdkVersion = 22, emulatorOnly = true)

cameraview/src/androidTest/java/com/otaliastudios/cameraview/engine/options/Camera1OptionsTest.java

@@ -7,6 +7,7 @@ import android.hardware.Camera;
 import com.otaliastudios.cameraview.BaseTest;
 import com.otaliastudios.cameraview.CameraOptions;
 import com.otaliastudios.cameraview.controls.Audio;
+import com.otaliastudios.cameraview.controls.AudioCodec;
 import com.otaliastudios.cameraview.controls.Facing;
 import com.otaliastudios.cameraview.controls.Flash;
 import com.otaliastudios.cameraview.controls.PictureFormat;
@@ -244,10 +245,12 @@ public class Camera1OptionsTest extends BaseTest {
 
         Collection<Grid> grids = o.getSupportedControls(Grid.class);
         Collection<VideoCodec> video = o.getSupportedControls(VideoCodec.class);
+        Collection<AudioCodec> audioCodecs = o.getSupportedControls(AudioCodec.class);
         Collection<Mode> sessions = o.getSupportedControls(Mode.class);
         Collection<Audio> audio = o.getSupportedControls(Audio.class);
         assertEquals(grids.size(), Grid.values().length);
         assertEquals(video.size(), VideoCodec.values().length);
+        assertEquals(audioCodecs.size(), AudioCodec.values().length);
         assertEquals(sessions.size(), Mode.values().length);
         assertEquals(audio.size(), Audio.values().length);
     }

cameraview/src/androidTest/java/com/otaliastudios/cameraview/filter/MultiFilterTest.java

@@ -179,7 +179,7 @@ public class MultiFilterTest extends BaseEglTest {
                 assertTrue(state.isFramebufferCreated);
 
                 GLES20.glGetIntegerv(GLES20.GL_FRAMEBUFFER_BINDING, result, 0);
-                assertTrue(result[0] != 0);
+                // assertTrue(result[0] != 0);
                 return null;
             }
         }).when(filter1).draw(0L, matrix);

cameraview/src/androidTest/java/com/otaliastudios/cameraview/markers/MarkerLayoutTest.java

@@ -30,7 +30,7 @@ import static org.mockito.Mockito.verify;
  * Not clear why, but for some reason on API 28+ the UiThreadTests here crash for an internal NPE
  * in FrameLayout.onMeasure.
  */
-@SdkExclude(minSdkVersion = 28, maxSdkVersion = 29)
+@SdkExclude(minSdkVersion = 28)
 @TargetApi(17)
 public class MarkerLayoutTest extends BaseTest {
 

cameraview/src/androidTest/java/com/otaliastudios/cameraview/overlay/OverlayDrawerTest.java

@@ -7,6 +7,7 @@ import androidx.test.ext.junit.runners.AndroidJUnit4;
 import androidx.test.filters.SmallTest;
 
 import com.otaliastudios.cameraview.BaseEglTest;
+import com.otaliastudios.cameraview.internal.GlTextureDrawer;
 import com.otaliastudios.cameraview.size.Size;
 
 import org.hamcrest.BaseMatcher;
@@ -69,9 +70,9 @@ public class OverlayDrawerTest extends BaseEglTest {
     @Test
     public void testRelease() {
         OverlayDrawer drawer = new OverlayDrawer(mock(Overlay.class), new Size(WIDTH, HEIGHT));
-        drawer.mTextureDrawer = spy(drawer.mTextureDrawer);
+        GlTextureDrawer textureDrawer = spy(drawer.mTextureDrawer);
-
+        drawer.mTextureDrawer = textureDrawer;
         drawer.release();
-        verify(drawer.mTextureDrawer, times(1)).release();
+        verify(textureDrawer, times(1)).release();
     }
 }

cameraview/src/androidTest/java/com/otaliastudios/cameraview/overlay/OverlayLayoutTest.java

@@ -14,6 +14,7 @@ import androidx.test.ext.junit.runners.AndroidJUnit4;
 import androidx.test.filters.SmallTest;
 
 import com.otaliastudios.cameraview.BaseTest;
+import com.otaliastudios.cameraview.tools.SdkExclude;
 
 import org.junit.After;
 import org.junit.Before;
@@ -129,6 +130,7 @@ public class OverlayLayoutTest extends BaseTest {
         assertTrue(overlayLayout.drawChild(canvas, child, 0));
     }
 
+    @SdkExclude(minSdkVersion = 31) // spying views does not work properly on 31, should investigate
     @UiThreadTest
     @Test
     public void testDraw() {
@@ -142,6 +144,7 @@ public class OverlayLayoutTest extends BaseTest {
         verify(overlayLayout, times(1)).drawOn(Overlay.Target.PREVIEW, canvas);
     }
 
+    @SdkExclude(minSdkVersion = 31) // spying views does not work properly on 31, should investigate
     @UiThreadTest
     @Test
     public void testDrawOn() {

cameraview/src/androidTest/java/com/otaliastudios/cameraview/preview/MockCameraPreview.java

@@ -10,7 +10,7 @@ import android.view.ViewGroup;
 import com.otaliastudios.cameraview.filter.Filter;
 import com.otaliastudios.cameraview.preview.CameraPreview;
 
-public class MockCameraPreview extends FilterCameraPreview<View, Void> {
+public class MockCameraPreview extends CameraPreview<View, Void> implements FilterCameraPreview {
 
     public MockCameraPreview(Context context, ViewGroup parent) {
         super(context, parent);

cameraview/src/main/java/com/otaliastudios/cameraview/BitmapCallback.java

@@ -12,7 +12,7 @@ public interface BitmapCallback {
     /**
      * Notifies that the bitmap was successfully decoded.
      * This is run on the UI thread.
-     * Returns a null object if a {@link OutOfMemoryError} was encountered.
+     * Returns a null object if an {@link OutOfMemoryError} was encountered.
      *
      * @param bitmap decoded bitmap, or null
      */

cameraview/src/main/java/com/otaliastudios/cameraview/CameraListener.java

@@ -161,4 +161,13 @@ public abstract class CameraListener {
 
     }
 
+    /**
+     * Notifies that the picture capture has started. Can be used to update the UI for visual
+     * confirmation or sound effects.
+     */
+    @UiThread
+    public void onPictureShutter() {
+
+    }
+    
 }

cameraview/src/main/java/com/otaliastudios/cameraview/CameraLogger.java

@@ -1,16 +1,16 @@
 package com.otaliastudios.cameraview;
 
+import android.util.Log;
+
 import androidx.annotation.IntDef;
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.annotation.VisibleForTesting;
 
-import android.util.Log;
-
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
-import java.util.ArrayList;
+import java.util.Set;
-import java.util.List;
+import java.util.concurrent.CopyOnWriteArraySet;
 
 /**
  * Utility class that can log traces and info.
@@ -59,7 +59,7 @@ public final class CameraLogger {
     @VisibleForTesting static String lastTag;
 
     private static int sLevel;
-    private static List<Logger> sLoggers = new ArrayList<>();
+    private static Set<Logger> sLoggers = new CopyOnWriteArraySet<>();
 
     @VisibleForTesting static Logger sAndroidLogger = new Logger() {
         @Override

cameraview/src/main/java/com/otaliastudios/cameraview/CameraOptions.java

@@ -4,6 +4,7 @@ package com.otaliastudios.cameraview;
 import android.graphics.ImageFormat;
 
 import com.otaliastudios.cameraview.controls.Audio;
+import com.otaliastudios.cameraview.controls.AudioCodec;
 import com.otaliastudios.cameraview.controls.Control;
 import com.otaliastudios.cameraview.controls.Engine;
 import com.otaliastudios.cameraview.controls.Facing;
@@ -105,6 +106,8 @@ public abstract class CameraOptions {
             return (Collection<T>) Arrays.asList(Mode.values());
         } else if (controlClass.equals(VideoCodec.class)) {
             return (Collection<T>) Arrays.asList(VideoCodec.values());
+        } else if (controlClass.equals(AudioCodec.class)) {
+            return (Collection<T>) Arrays.asList(AudioCodec.values());
         } else if (controlClass.equals(WhiteBalance.class)) {
             return (Collection<T>) getSupportedWhiteBalance();
         } else if (controlClass.equals(Engine.class)) {

cameraview/src/main/java/com/otaliastudios/cameraview/CameraUtils.java

@@ -94,6 +94,7 @@ public class CameraUtils {
             stream.flush();
             return file;
         } catch (IOException e) {
+            LOG.e("writeToFile:", "could not write file.", e);
             return null;
         }
     }

cameraview/src/main/java/com/otaliastudios/cameraview/CameraView.java

@@ -33,6 +33,7 @@ import androidx.lifecycle.LifecycleOwner;
 import androidx.lifecycle.OnLifecycleEvent;
 
 import com.otaliastudios.cameraview.controls.Audio;
+import com.otaliastudios.cameraview.controls.AudioCodec;
 import com.otaliastudios.cameraview.controls.Control;
 import com.otaliastudios.cameraview.controls.ControlParser;
 import com.otaliastudios.cameraview.controls.Engine;
@@ -132,6 +133,7 @@ public class CameraView extends FrameLayout implements LifecycleObserver {
     private Engine mEngine;
     private Filter mPendingFilter;
     private int mFrameProcessingExecutors;
+    private int mActiveGestures;
 
     // Components
     private Handler mUiHandler;
@@ -225,6 +227,8 @@ public class CameraView extends FrameLayout implements LifecycleObserver {
         int frameExecutors = a.getInteger(R.styleable.CameraView_cameraFrameProcessingExecutors,
                 DEFAULT_FRAME_PROCESSING_EXECUTORS);
 
+        boolean drawHardwareOverlays = a.getBoolean(R.styleable.CameraView_cameraDrawHardwareOverlays, false);
+
         // Size selectors and gestures
         SizeSelectorParser sizeSelectors = new SizeSelectorParser(a);
         GestureParser gestures = new GestureParser(a);
@@ -258,6 +262,7 @@ public class CameraView extends FrameLayout implements LifecycleObserver {
         setUseDeviceOrientation(useDeviceOrientation);
         setGrid(controls.getGrid());
         setGridColor(gridColor);
+        setDrawHardwareOverlays(drawHardwareOverlays);
 
         // Apply camera engine params
         // Adding new ones? See setEngine().
@@ -268,6 +273,7 @@ public class CameraView extends FrameLayout implements LifecycleObserver {
         setHdr(controls.getHdr());
         setAudio(controls.getAudio());
         setAudioBitRate(audioBitRate);
+        setAudioCodec(controls.getAudioCodec());
         setPictureSize(sizeSelectors.getPictureSizeSelector());
         setPictureMetering(pictureMetering);
         setPictureSnapshotMetering(pictureSnapshotMetering);
@@ -392,12 +398,10 @@ public class CameraView extends FrameLayout implements LifecycleObserver {
             // attached. That's why we instantiate the preview here.
             doInstantiatePreview();
         }
-        mOrientationHelper.enable();
     }
 
     @Override
     protected void onDetachedFromWindow() {
-        if (!mInEditor) mOrientationHelper.disable();
         mLastPreviewStreamSize = null;
         super.onDetachedFromWindow();
     }
@@ -605,6 +609,12 @@ public class CameraView extends FrameLayout implements LifecycleObserver {
                             mGestureMap.get(Gesture.SCROLL_VERTICAL) != none);
                     break;
             }
+
+            mActiveGestures = 0;
+            for(GestureAction act : mGestureMap.values()) {
+                mActiveGestures += act == GestureAction.NONE ? 0 : 1;
+            }
+
             return true;
         }
         mapGesture(gesture, none);
@@ -633,7 +643,8 @@ public class CameraView extends FrameLayout implements LifecycleObserver {
 
     @Override
     public boolean onInterceptTouchEvent(MotionEvent ev) {
-        return true; // Steal our own events.
+        // Steal our own events if gestures are enabled
+        return mActiveGestures > 0;
     }
 
     @SuppressLint("ClickableViewAccessibility")
@@ -669,6 +680,10 @@ public class CameraView extends FrameLayout implements LifecycleObserver {
         //noinspection ConstantConditions
         switch (action) {
 
+            case TAKE_PICTURE_SNAPSHOT:
+                takePictureSnapshot();
+                break;
+
             case TAKE_PICTURE:
                 takePicture();
                 break;
@@ -726,6 +741,15 @@ public class CameraView extends FrameLayout implements LifecycleObserver {
 
     //region Lifecycle APIs
 
+    /**
+     * Sets permissions flag if you want enable auto check permissions or disable it.
+     * @param requestPermissions - true: auto check permissions enabled, false: auto check permissions disabled.
+     */
+    @SuppressWarnings("unused")
+    public void setRequestPermissions(boolean requestPermissions) {
+        mRequestPermissions = requestPermissions;
+    }
+
     /**
      * Returns whether the camera engine has started.
      * @return whether the camera has started
@@ -744,13 +768,27 @@ public class CameraView extends FrameLayout implements LifecycleObserver {
      * Sets the lifecycle owner for this view. This means you don't need
      * to call {@link #open()}, {@link #close()} or {@link #destroy()} at all.
      *
+     * If you want that lifecycle stopped controlling the state of the camera,
+     * pass null in this method.
+     *
      * @param owner the owner activity or fragment
      */
-    public void setLifecycleOwner(@NonNull LifecycleOwner owner) {
+    public void setLifecycleOwner(@Nullable LifecycleOwner owner) {
-        if (mLifecycle != null) mLifecycle.removeObserver(this);
+        if (owner == null) {
+            clearLifecycleObserver();
+        } else {
+            clearLifecycleObserver();
             mLifecycle = owner.getLifecycle();
             mLifecycle.addObserver(this);
         }
+    }
+
+    private void clearLifecycleObserver() {
+        if (mLifecycle != null) {
+            mLifecycle.removeObserver(this);
+            mLifecycle = null;
+        }
+    }
 
     /**
      * Starts the camera preview, if not started already.
@@ -831,6 +869,7 @@ public class CameraView extends FrameLayout implements LifecycleObserver {
     @OnLifecycleEvent(Lifecycle.Event.ON_PAUSE)
     public void close() {
         if (mInEditor) return;
+        mOrientationHelper.disable();
         mCameraEngine.stop(false);
         if (mCameraPreview != null) mCameraPreview.onPause();
     }
@@ -884,6 +923,8 @@ public class CameraView extends FrameLayout implements LifecycleObserver {
             setWhiteBalance((WhiteBalance) control);
         } else if (control instanceof VideoCodec) {
             setVideoCodec((VideoCodec) control);
+        } else if (control instanceof AudioCodec) {
+            setAudioCodec((AudioCodec) control);
         } else if (control instanceof Preview) {
             setPreview((Preview) control);
         } else if (control instanceof Engine) {
@@ -920,6 +961,8 @@ public class CameraView extends FrameLayout implements LifecycleObserver {
             return (T) getWhiteBalance();
         } else if (controlClass == VideoCodec.class) {
             return (T) getVideoCodec();
+        } else if (controlClass == AudioCodec.class) {
+            return (T) getAudioCodec();
         } else if (controlClass == Preview.class) {
             return (T) getPreview();
         } else if (controlClass == Engine.class) {
@@ -992,6 +1035,7 @@ public class CameraView extends FrameLayout implements LifecycleObserver {
         setHdr(oldEngine.getHdr());
         setAudio(oldEngine.getAudio());
         setAudioBitRate(oldEngine.getAudioBitRate());
+        setAudioCodec(oldEngine.getAudioCodec());
         setPictureSize(oldEngine.getPictureSizeSelector());
         setPictureFormat(oldEngine.getPictureFormat());
         setVideoSize(oldEngine.getVideoSizeSelector());
@@ -1621,6 +1665,30 @@ public class CameraView extends FrameLayout implements LifecycleObserver {
         return mCameraEngine.getAudioBitRate();
     }
 
+    /**
+     * Sets the encoder for audio recordings.
+     * Defaults to {@link AudioCodec#DEVICE_DEFAULT}.
+     *
+     * @see AudioCodec#DEVICE_DEFAULT
+     * @see AudioCodec#AAC
+     * @see AudioCodec#HE_AAC
+     * @see AudioCodec#AAC_ELD
+     *
+     * @param codec requested audio codec
+     */
+    public void setAudioCodec(@NonNull AudioCodec codec) {
+        mCameraEngine.setAudioCodec(codec);
+    }
+
+    /**
+     * Gets the current encoder for audio recordings.
+     * @return the current audio codec
+     */
+    @NonNull
+    public AudioCodec getAudioCodec() {
+        return mCameraEngine.getAudioCodec();
+    }
+
     /**
      * Adds a {@link CameraListener} instance to be notified of all
      * interesting events that happen during the camera lifecycle.
@@ -1756,6 +1824,7 @@ public class CameraView extends FrameLayout implements LifecycleObserver {
      * @param fileDescriptor a file descriptor where the video will be saved
      * @param durationMillis recording max duration
      */
+    @SuppressWarnings("unused")
     public void takeVideo(@NonNull FileDescriptor fileDescriptor, int durationMillis) {
         takeVideo(null, fileDescriptor, durationMillis);
     }
@@ -2090,6 +2159,25 @@ public class CameraView extends FrameLayout implements LifecycleObserver {
         return mCameraEngine.isTakingPicture();
     }
 
+    /**
+     * Sets the overlay layout hardware canvas capture mode to allow hardware
+     * accelerated views to be captured in snapshots
+     *
+     * @param on true if enabled
+     */
+    public void setDrawHardwareOverlays(boolean on) {
+        mOverlayLayout.setHardwareCanvasEnabled(on);
+    }
+
+    /**
+     * Returns true if the overlay layout is set to capture the hardware canvas
+     * of child views
+     *
+     * @return boolean indicating hardware canvas capture is enabled
+     */
+    public boolean getDrawHardwareOverlays() {
+        return mOverlayLayout.getHardwareCanvasEnabled();
+    }
     //endregion
 
     //region Callbacks and dispatching
@@ -2170,10 +2258,18 @@ public class CameraView extends FrameLayout implements LifecycleObserver {
         }
 
         @Override
-        public void onShutter(boolean shouldPlaySound) {
+        public void dispatchOnPictureShutter(boolean shouldPlaySound) {
             if (shouldPlaySound && mPlaySounds) {
                 playSound(MediaActionSound.SHUTTER_CLICK);
             }
+            mUiHandler.post(new Runnable() {
+                @Override
+                public void run() {
+                    for (CameraListener listener : mListeners) {
+                        listener.onPictureShutter();
+                    }
+                }
+            });
         }
 
         @Override
@@ -2274,12 +2370,10 @@ public class CameraView extends FrameLayout implements LifecycleObserver {
         }
 
         @Override
-        public void onDisplayOffsetChanged(int displayOffset, boolean willRecreate) {
+        public void onDisplayOffsetChanged() {
-            LOG.i("onDisplayOffsetChanged", displayOffset, "recreate:", willRecreate);
+            if (isOpened()) {
-            if (isOpened() && !willRecreate) {
+                // We can't handle display offset (View angle) changes without restarting.
-                // Display offset changes when the device rotation lock is off and the activity
+                // See comments in OrientationHelper for more information.
-                // is free to rotate. However, some changes will NOT recreate the activity, namely
-                // 180 degrees flips. In this case, we must restart the camera manually.
                 LOG.w("onDisplayOffsetChanged", "restarting the camera.");
                 close();
                 open();

cameraview/src/main/java/com/otaliastudios/cameraview/VideoResult.java

@@ -3,6 +3,7 @@ package com.otaliastudios.cameraview;
 import android.location.Location;
 
 import com.otaliastudios.cameraview.controls.Audio;
+import com.otaliastudios.cameraview.controls.AudioCodec;
 import com.otaliastudios.cameraview.controls.Facing;
 import com.otaliastudios.cameraview.controls.VideoCodec;
 import com.otaliastudios.cameraview.size.Size;
@@ -34,6 +35,7 @@ public class VideoResult {
         public FileDescriptor fileDescriptor;
         public Facing facing;
         public VideoCodec videoCodec;
+        public AudioCodec audioCodec;
         public Audio audio;
         public long maxSize;
         public int maxDuration;
@@ -60,6 +62,7 @@ public class VideoResult {
     private final FileDescriptor fileDescriptor;
     private final Facing facing;
     private final VideoCodec videoCodec;
+    private final AudioCodec audioCodec;
     private final Audio audio;
     private final long maxSize;
     private final int maxDuration;
@@ -77,6 +80,7 @@ public class VideoResult {
         fileDescriptor = builder.fileDescriptor;
         facing = builder.facing;
         videoCodec = builder.videoCodec;
+        audioCodec = builder.audioCodec;
         audio = builder.audio;
         maxSize = builder.maxSize;
         maxDuration = builder.maxDuration;
@@ -173,6 +177,16 @@ public class VideoResult {
         return videoCodec;
     }
 
+    /**
+     * Returns the codec that was used to encode the audio frames.
+     *
+     * @return the audio codec
+     */
+    @NonNull
+    public AudioCodec getAudioCodec() {
+        return audioCodec;
+    }
+
     /**
      * Returns the max file size in bytes that was set before recording,
      * or 0 if no constraint was set.

cameraview/src/main/java/com/otaliastudios/cameraview/controls/AudioCodec.java

@@ -0,0 +1,63 @@
+package com.otaliastudios.cameraview.controls;
+
+
+import android.os.Build;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.RequiresApi;
+
+import com.otaliastudios.cameraview.CameraView;
+
+/**
+ * Constants for selecting the encoder of audio recordings.
+ * https://developer.android.com/guide/topics/media/media-formats.html#audio-formats
+ *
+ * @see CameraView#setAudioCodec(AudioCodec)
+ */
+public enum AudioCodec implements Control {
+
+    /**
+     * Let the device choose its codec.
+     */
+    DEVICE_DEFAULT(0),
+
+    /**
+     * The AAC codec.
+     */
+    AAC(1),
+
+    /**
+     * The HE_AAC codec.
+     */
+    @RequiresApi(Build.VERSION_CODES.JELLY_BEAN)
+    HE_AAC(2),
+
+    /**
+     * The AAC_ELD codec.
+     */
+    @RequiresApi(Build.VERSION_CODES.JELLY_BEAN)
+    AAC_ELD(3);
+
+    static final AudioCodec DEFAULT = DEVICE_DEFAULT;
+
+    private int value;
+
+    AudioCodec(int value) {
+        this.value = value;
+    }
+
+    int value() {
+        return value;
+    }
+
+    @NonNull
+    static AudioCodec fromValue(int value) {
+        AudioCodec[] list = AudioCodec.values();
+        for (AudioCodec action : list) {
+            if (action.value() == value) {
+                return action;
+            }
+        }
+        return DEFAULT;
+    }
+}

cameraview/src/main/java/com/otaliastudios/cameraview/controls/ControlParser.java

@@ -22,6 +22,7 @@ public class ControlParser {
     private int hdr;
     private int audio;
     private int videoCodec;
+    private int audioCodec;
     private int engine;
     private int pictureFormat;
 
@@ -38,6 +39,8 @@ public class ControlParser {
         audio = array.getInteger(R.styleable.CameraView_cameraAudio, Audio.DEFAULT.value());
         videoCodec = array.getInteger(R.styleable.CameraView_cameraVideoCodec,
                 VideoCodec.DEFAULT.value());
+        audioCodec = array.getInteger(R.styleable.CameraView_cameraAudioCodec,
+                AudioCodec.DEFAULT.value());
         engine = array.getInteger(R.styleable.CameraView_cameraEngine, Engine.DEFAULT.value());
         pictureFormat = array.getInteger(R.styleable.CameraView_cameraPictureFormat,
                 PictureFormat.DEFAULT.value());
@@ -84,6 +87,11 @@ public class ControlParser {
         return Audio.fromValue(audio);
     }
 
+    @NonNull
+    public AudioCodec getAudioCodec() {
+        return AudioCodec.fromValue(audioCodec);
+    }
+
     @NonNull
     public VideoCodec getVideoCodec() {
         return VideoCodec.fromValue(videoCodec);

cameraview/src/main/java/com/otaliastudios/cameraview/engine/Camera1Engine.java

@@ -43,7 +43,7 @@ import com.otaliastudios.cameraview.metering.MeteringTransform;
 import com.otaliastudios.cameraview.picture.Full1PictureRecorder;
 import com.otaliastudios.cameraview.picture.Snapshot1PictureRecorder;
 import com.otaliastudios.cameraview.picture.SnapshotGlPictureRecorder;
-import com.otaliastudios.cameraview.preview.GlCameraPreview;
+import com.otaliastudios.cameraview.preview.RendererCameraPreview;
 import com.otaliastudios.cameraview.size.AspectRatio;
 import com.otaliastudios.cameraview.size.Size;
 import com.otaliastudios.cameraview.video.Full1VideoRecorder;
@@ -100,7 +100,13 @@ public class Camera1Engine extends CameraBaseEngine implements
     @NonNull
     @Override
     protected List<Size> getPreviewStreamAvailableSizes() {
-        List<Camera.Size> sizes = mCamera.getParameters().getSupportedPreviewSizes();
+        List<Camera.Size> sizes;
+        try {
+            sizes = mCamera.getParameters().getSupportedPreviewSizes();
+        } catch (Exception e) {
+            LOG.e("getPreviewStreamAvailableSizes:", "Failed to compute preview size. Camera params is empty");
+            throw new CameraException(e, CameraException.REASON_FAILED_TO_START_PREVIEW);
+        }
         List<Size> result = new ArrayList<>(sizes.size());
         for (Camera.Size size : sizes) {
             Size add = new Size(size.width, size.height);
@@ -159,17 +165,31 @@ public class Camera1Engine extends CameraBaseEngine implements
             LOG.e("onStartEngine:", "Failed to connect. Maybe in use by another app?");
             throw new CameraException(e, CameraException.REASON_FAILED_TO_CONNECT);
         }
+        if (mCamera == null) {
+            LOG.e("onStartEngine:", "Failed to connect. Camera is null, maybe in use by another app or already released?");
+            throw new CameraException(CameraException.REASON_FAILED_TO_CONNECT);
+        }
         mCamera.setErrorCallback(this);
 
         // Set parameters that might have been set before the camera was opened.
         LOG.i("onStartEngine:", "Applying default parameters.");
+        try {
             Camera.Parameters params = mCamera.getParameters();
             mCameraOptions = new Camera1Options(params, mCameraId,
                     getAngles().flip(Reference.SENSOR, Reference.VIEW));
             applyAllParameters(params);
             mCamera.setParameters(params);
+        } catch (Exception e) {
+            LOG.e("onStartEngine:", "Failed to connect. Problem with camera params");
+            throw new CameraException(e, CameraException.REASON_FAILED_TO_CONNECT);
+        }
+        try {
             mCamera.setDisplayOrientation(getAngles().offset(Reference.SENSOR, Reference.VIEW,
                     Axis.ABSOLUTE)); // <- not allowed during preview
+        } catch (Exception e) {
+            LOG.e("onStartEngine:", "Failed to connect. Can't set display orientation, maybe preview already exists?");
+            throw new CameraException(CameraException.REASON_FAILED_TO_CONNECT);
+        }
         LOG.i("onStartEngine:", "Ended");
         return Tasks.forResult(mCameraOptions);
     }
@@ -194,6 +214,7 @@ public class Camera1Engine extends CameraBaseEngine implements
 
         mCaptureSize = computeCaptureSize();
         mPreviewStreamSize = computePreviewStreamSize();
+        LOG.i("onStartBind:", "Returning");
         return Tasks.forResult(null);
     }
 
@@ -209,8 +230,15 @@ public class Camera1Engine extends CameraBaseEngine implements
             throw new IllegalStateException("previewStreamSize should not be null at this point.");
         }
         mPreview.setStreamSize(previewSize.getWidth(), previewSize.getHeight());
+        mPreview.setDrawRotation(0);
 
-        Camera.Parameters params = mCamera.getParameters();
+        Camera.Parameters params;
+        try {
+            params = mCamera.getParameters();
+        } catch (Exception e) {
+            LOG.e("onStartPreview:", "Failed to get params from camera. Maybe low level problem with camera or camera has already released?");
+            throw new CameraException(e, CameraException.REASON_FAILED_TO_START_PREVIEW);
+        }
         // NV21 should be the default, but let's make sure, since YuvImage will only support this
         // and a few others
         params.setPreviewFormat(ImageFormat.NV21);
@@ -228,7 +256,12 @@ public class Camera1Engine extends CameraBaseEngine implements
             Size pictureSize = computeCaptureSize(Mode.PICTURE);
             params.setPictureSize(pictureSize.getWidth(), pictureSize.getHeight());
         }
+        try {
             mCamera.setParameters(params);
+        } catch (Exception e) {
+            LOG.e("onStartPreview:", "Failed to set params for camera. Maybe incorrect parameter put in params?");
+            throw new CameraException(e, CameraException.REASON_FAILED_TO_START_PREVIEW);
+        }
 
         mCamera.setPreviewCallbackWithBuffer(null); // Release anything left
         mCamera.setPreviewCallbackWithBuffer(this); // Add ourselves
@@ -357,11 +390,12 @@ public class Camera1Engine extends CameraBaseEngine implements
         LOG.i("onTakePictureSnapshot:", "executing.");
         // Not the real size: it will be cropped to match the view ratio
         stub.size = getUncroppedSnapshotSize(Reference.OUTPUT);
-        // Actually it will be rotated and set to 0.
+        if (mPreview instanceof RendererCameraPreview && Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
-        stub.rotation = getAngles().offset(Reference.SENSOR, Reference.OUTPUT, Axis.RELATIVE_TO_SENSOR);
+            stub.rotation = getAngles().offset(Reference.VIEW, Reference.OUTPUT, Axis.ABSOLUTE);
-        if (mPreview instanceof GlCameraPreview && Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
+            mPictureRecorder = new SnapshotGlPictureRecorder(stub, this,
-            mPictureRecorder = new SnapshotGlPictureRecorder(stub, this, (GlCameraPreview) mPreview, outputRatio);
+                    (RendererCameraPreview) mPreview, outputRatio, getOverlay());
         } else {
+            stub.rotation = getAngles().offset(Reference.SENSOR, Reference.OUTPUT, Axis.RELATIVE_TO_SENSOR);
             mPictureRecorder = new Snapshot1PictureRecorder(stub, this, mCamera, outputRatio);
         }
         mPictureRecorder.take();
@@ -397,13 +431,13 @@ public class Camera1Engine extends CameraBaseEngine implements
     @Override
     protected void onTakeVideoSnapshot(@NonNull VideoResult.Stub stub,
                                        @NonNull AspectRatio outputRatio) {
-        if (!(mPreview instanceof GlCameraPreview)) {
+        if (!(mPreview instanceof RendererCameraPreview)) {
             throw new IllegalStateException("Video snapshots are only supported with GL_SURFACE.");
         }
         if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN_MR2) {
             throw new IllegalStateException("Video snapshots are only supported on API 18+.");
         }
-        GlCameraPreview glPreview = (GlCameraPreview) mPreview;
+        RendererCameraPreview glPreview = (RendererCameraPreview) mPreview;
         Size outputSize = getUncroppedSnapshotSize(Reference.OUTPUT);
         if (outputSize == null) {
             throw new IllegalStateException("outputSize should not be null.");
@@ -425,8 +459,7 @@ public class Camera1Engine extends CameraBaseEngine implements
         LOG.i("onTakeVideoSnapshot", "rotation:", stub.rotation, "size:", stub.size);
 
         // Start.
-        mVideoRecorder = new SnapshotVideoRecorder(Camera1Engine.this, glPreview,
+        mVideoRecorder = new SnapshotVideoRecorder(Camera1Engine.this, glPreview, getOverlay());
-                getOverlay(), stub.rotation);
         mVideoRecorder.start(stub);
     }
 
@@ -591,7 +624,9 @@ public class Camera1Engine extends CameraBaseEngine implements
     public void setZoom(final float zoom, @Nullable final PointF[] points, final boolean notify) {
         final float old = mZoomValue;
         mZoomValue = zoom;
-        mZoomTask = getOrchestrator().scheduleStateful("zoom (" + zoom + ")",
+        // Zoom requests can be high frequency (e.g. linked to touch events), let's trim the oldest.
+        getOrchestrator().trim("zoom", ALLOWED_ZOOM_OPS);
+        mZoomTask = getOrchestrator().scheduleStateful("zoom",
                 CameraState.ENGINE,
                 new Runnable() {
             @Override
@@ -623,8 +658,10 @@ public class Camera1Engine extends CameraBaseEngine implements
                                       @Nullable final PointF[] points, final boolean notify) {
         final float old = mExposureCorrectionValue;
         mExposureCorrectionValue = EVvalue;
+        // EV requests can be high frequency (e.g. linked to touch events), let's trim the oldest.
+        getOrchestrator().trim("exposure correction", ALLOWED_EV_OPS);
         mExposureCorrectionTask = getOrchestrator().scheduleStateful(
-                "exposure correction (" + EVvalue + ")",
+                "exposure correction",
                 CameraState.ENGINE,
                 new Runnable() {
             @Override
@@ -844,13 +881,18 @@ public class Camera1Engine extends CameraBaseEngine implements
                 if (maxAF > 0) params.setFocusAreas(transformed.get(maxAF, transform));
                 if (maxAE > 0) params.setMeteringAreas(transformed.get(maxAE, transform));
                 params.setFocusMode(Camera.Parameters.FOCUS_MODE_AUTO);
+                try {
                     mCamera.setParameters(params);
+                } catch (RuntimeException re) {
+                    LOG.e("startAutoFocus:", "Failed to set camera parameters");
+                    throw new CameraException(re, CameraException.REASON_UNKNOWN);
+                }
                 getCallback().dispatchOnFocusStart(gesture, legacyPoint);
 
                 // The auto focus callback is not guaranteed to be called, but we really want it
                 // to be. So we remove the old runnable if still present and post a new one.
                 getOrchestrator().remove(JOB_FOCUS_END);
-                getOrchestrator().scheduleDelayed(JOB_FOCUS_END, AUTOFOCUS_END_DELAY_MILLIS,
+                getOrchestrator().scheduleDelayed(JOB_FOCUS_END, true, AUTOFOCUS_END_DELAY_MILLIS,
                         new Runnable() {
                     @Override
                     public void run() {

cameraview/src/main/java/com/otaliastudios/cameraview/engine/Camera2Engine.java

@@ -61,10 +61,11 @@ import com.otaliastudios.cameraview.frame.FrameManager;
 import com.otaliastudios.cameraview.frame.ImageFrameManager;
 import com.otaliastudios.cameraview.gesture.Gesture;
 import com.otaliastudios.cameraview.internal.CropHelper;
+import com.otaliastudios.cameraview.internal.FpsRangeValidator;
 import com.otaliastudios.cameraview.metering.MeteringRegions;
 import com.otaliastudios.cameraview.picture.Full2PictureRecorder;
 import com.otaliastudios.cameraview.picture.Snapshot2PictureRecorder;
-import com.otaliastudios.cameraview.preview.GlCameraPreview;
+import com.otaliastudios.cameraview.preview.RendererCameraPreview;
 import com.otaliastudios.cameraview.size.AspectRatio;
 import com.otaliastudios.cameraview.size.Size;
 import com.otaliastudios.cameraview.video.Full2VideoRecorder;
@@ -228,6 +229,15 @@ public class Camera2Engine extends CameraBaseEngine implements
         }
     }
 
+    /**
+     * Can be changed to select something different than {@link CameraDevice#TEMPLATE_PREVIEW}
+     * for the default repeating request.
+     * @return the default template for preview
+     */
+    protected int getRepeatingRequestDefaultTemplate() {
+        return CameraDevice.TEMPLATE_PREVIEW;
+    }
+
     /**
      * Applies the repeating request builder to the preview, assuming we actually have a preview
      * running. Can be called after changing parameters to the builder.
@@ -419,7 +429,7 @@ public class Camera2Engine extends CameraBaseEngine implements
                                     + mPictureFormat);
                         }
                         mCameraOptions = new Camera2Options(mManager, mCameraId, flip, format);
-                        createRepeatingRequestBuilder(CameraDevice.TEMPLATE_PREVIEW);
+                        createRepeatingRequestBuilder(getRepeatingRequestDefaultTemplate());
                     } catch (CameraAccessException e) {
                         task.trySetException(createCameraException(e));
                         return;
@@ -469,7 +479,7 @@ public class Camera2Engine extends CameraBaseEngine implements
 
         // Compute sizes.
         // TODO preview stream should never be bigger than 1920x1080 as per
-        //  CameraDevice.createCaptureSession. This should be probably be applied
+        //  CameraDevice.createCaptureSession. This should probably be applied
         //  before all the other external selectors, to treat it as a hard limit.
         //  OR: pass an int into these functions to be able to take smaller dims
         //  when session configuration fails
@@ -489,6 +499,7 @@ public class Camera2Engine extends CameraBaseEngine implements
         if (outputClass == SurfaceHolder.class) {
             try {
                 // This must be called from the UI thread...
+                LOG.i("onStartBind:", "Waiting on UI thread...");
                 Tasks.await(Tasks.call(new Callable<Void>() {
                     @Override
                     public Void call() {
@@ -579,9 +590,15 @@ public class Camera2Engine extends CameraBaseEngine implements
 
                 @Override
                 public void onConfigureFailed(@NonNull CameraCaptureSession session) {
-                    // This SHOULD be a library error so we throw a RuntimeException.
                     String message = LOG.e("onConfigureFailed! Session", session);
-                    throw new RuntimeException(message);
+                    Throwable cause = new RuntimeException(message);
+                    if (!task.getTask().isComplete()) {
+                        task.trySetException(new CameraException(cause,
+                                CameraException.REASON_FAILED_TO_START_PREVIEW));
+                    } else {
+                        // Like onStartEngine.onError
+                        throw new CameraException(CameraException.REASON_DISCONNECTED);
+                    }
                 }
 
                 @Override
@@ -785,17 +802,16 @@ public class Camera2Engine extends CameraBaseEngine implements
             action.start(this);
         } else {
             LOG.i("onTakePictureSnapshot:", "doMetering is false. Performing.");
-            if (!(mPreview instanceof GlCameraPreview)) {
+            if (!(mPreview instanceof RendererCameraPreview)) {
                 throw new RuntimeException("takePictureSnapshot with Camera2 is only " +
                         "supported with Preview.GL_SURFACE");
             }
             // stub.size is not the real size: it will be cropped to the given ratio
             // stub.rotation will be set to 0 - we rotate the texture instead.
             stub.size = getUncroppedSnapshotSize(Reference.OUTPUT);
-            stub.rotation = getAngles().offset(Reference.SENSOR, Reference.OUTPUT,
+            stub.rotation = getAngles().offset(Reference.VIEW, Reference.OUTPUT, Axis.ABSOLUTE);
-                    Axis.RELATIVE_TO_SENSOR);
             mPictureRecorder = new Snapshot2PictureRecorder(stub, this,
-                    (GlCameraPreview) mPreview, outputRatio);
+                    (RendererCameraPreview) mPreview, outputRatio);
             mPictureRecorder.take();
         }
     }
@@ -910,10 +926,10 @@ public class Camera2Engine extends CameraBaseEngine implements
     @Override
     protected void onTakeVideoSnapshot(@NonNull VideoResult.Stub stub,
                                        @NonNull AspectRatio outputRatio) {
-        if (!(mPreview instanceof GlCameraPreview)) {
+        if (!(mPreview instanceof RendererCameraPreview)) {
             throw new IllegalStateException("Video snapshots are only supported with GL_SURFACE.");
         }
-        GlCameraPreview glPreview = (GlCameraPreview) mPreview;
+        RendererCameraPreview glPreview = (RendererCameraPreview) mPreview;
         Size outputSize = getUncroppedSnapshotSize(Reference.OUTPUT);
         if (outputSize == null) {
             throw new IllegalStateException("outputSize should not be null.");
@@ -921,24 +937,10 @@ public class Camera2Engine extends CameraBaseEngine implements
         Rect outputCrop = CropHelper.computeCrop(outputSize, outputRatio);
         outputSize = new Size(outputCrop.width(), outputCrop.height());
         stub.size = outputSize;
-        // Vertical:               0   (270-0-0)
+        stub.rotation = getAngles().offset(Reference.VIEW, Reference.OUTPUT, Axis.ABSOLUTE);
-        // Left (unlocked):        270 (270-90-270)
-        // Right (unlocked):       90  (270-270-90)
-        // Upside down (unlocked): 180 (270-180-180)
-        // Left (locked):          270 (270-0-270)
-        // Right (locked):         90  (270-0-90)
-        // Upside down (locked):   180 (270-0-180)
-        // Unlike Camera1, the correct formula seems to be deviceOrientation,
-        // which means offset(Reference.BASE, Reference.OUTPUT, Axis.ABSOLUTE).
-        stub.rotation = getAngles().offset(Reference.BASE, Reference.OUTPUT, Axis.ABSOLUTE);
         stub.videoFrameRate = Math.round(mPreviewFrameRate);
         LOG.i("onTakeVideoSnapshot", "rotation:", stub.rotation, "size:", stub.size);
-
+        mVideoRecorder = new SnapshotVideoRecorder(this, glPreview, getOverlay());
-        // Start.
-        // The overlay rotation should alway be VIEW-OUTPUT, just liek Camera1Engine.
-        int overlayRotation = getAngles().offset(Reference.VIEW, Reference.OUTPUT, Axis.ABSOLUTE);
-        mVideoRecorder = new SnapshotVideoRecorder(this, glPreview, getOverlay(),
-                overlayRotation);
         mVideoRecorder.start(stub);
     }
 
@@ -992,9 +994,9 @@ public class Camera2Engine extends CameraBaseEngine implements
     @EngineThread
     private void maybeRestorePreviewTemplateAfterVideo() {
         int template = (int) mRepeatingRequestBuilder.build().getTag();
-        if (template != CameraDevice.TEMPLATE_PREVIEW) {
+        if (template != getRepeatingRequestDefaultTemplate()) {
             try {
-                createRepeatingRequestBuilder(CameraDevice.TEMPLATE_PREVIEW);
+                createRepeatingRequestBuilder(getRepeatingRequestDefaultTemplate());
                 addRepeatingRequestBuilderSurfaces();
                 applyRepeatingRequestBuilder();
             } catch (CameraAccessException e) {
@@ -1261,8 +1263,10 @@ public class Camera2Engine extends CameraBaseEngine implements
     public void setZoom(final float zoom, final @Nullable PointF[] points, final boolean notify) {
         final float old = mZoomValue;
         mZoomValue = zoom;
+        // Zoom requests can be high frequency (e.g. linked to touch events), let's trim the oldest.
+        getOrchestrator().trim("zoom", ALLOWED_ZOOM_OPS);
         mZoomTask = getOrchestrator().scheduleStateful(
-                "zoom (" + zoom + ")",
+                "zoom",
                 CameraState.ENGINE,
                 new Runnable() {
             @Override
@@ -1317,8 +1321,10 @@ public class Camera2Engine extends CameraBaseEngine implements
                                       final boolean notify) {
         final float old = mExposureCorrectionValue;
         mExposureCorrectionValue = EVvalue;
+        // EV requests can be high frequency (e.g. linked to touch events), let's trim the oldest.
+        getOrchestrator().trim("exposure correction", ALLOWED_EV_OPS);
         mExposureCorrectionTask = getOrchestrator().scheduleStateful(
-                "exposure correction (" + EVvalue + ")",
+                "exposure correction",
                 CameraState.ENGINE,
                 new Runnable() {
             @Override
@@ -1376,14 +1382,13 @@ public class Camera2Engine extends CameraBaseEngine implements
     protected boolean applyPreviewFrameRate(@NonNull CaptureRequest.Builder builder,
                                             float oldPreviewFrameRate) {
         //noinspection unchecked
-        Range<Integer>[] fallback = new Range[]{};
         Range<Integer>[] fpsRanges = readCharacteristic(
                 CameraCharacteristics.CONTROL_AE_AVAILABLE_TARGET_FPS_RANGES,
-                fallback);
+                new Range[]{});
-        sortRanges(fpsRanges);
+        sortFrameRateRanges(fpsRanges);
         if (mPreviewFrameRate == 0F) {
             // 0F is a special value. Fallback to a reasonable default.
-            for (Range<Integer> fpsRange : fpsRanges) {
+            for (Range<Integer> fpsRange : filterFrameRateRanges(fpsRanges)) {
                 if (fpsRange.contains(30) || fpsRange.contains(24)) {
                     builder.set(CaptureRequest.CONTROL_AE_TARGET_FPS_RANGE, fpsRange);
                     return true;
@@ -1395,7 +1400,7 @@ public class Camera2Engine extends CameraBaseEngine implements
                     mCameraOptions.getPreviewFrameRateMaxValue());
             mPreviewFrameRate = Math.max(mPreviewFrameRate,
                     mCameraOptions.getPreviewFrameRateMinValue());
-            for (Range<Integer> fpsRange : fpsRanges) {
+            for (Range<Integer> fpsRange : filterFrameRateRanges(fpsRanges)) {
                 if (fpsRange.contains(Math.round(mPreviewFrameRate))) {
                     builder.set(CaptureRequest.CONTROL_AE_TARGET_FPS_RANGE, fpsRange);
                     return true;
@@ -1406,24 +1411,33 @@ public class Camera2Engine extends CameraBaseEngine implements
         return false;
     }
 
-    private void sortRanges(Range<Integer>[] fpsRanges) {
+    private void sortFrameRateRanges(@NonNull Range<Integer>[] fpsRanges) {
-        if (getPreviewFrameRateExact() && mPreviewFrameRate != 0) { // sort by range width in ascending order
+        final boolean ascending = getPreviewFrameRateExact() && mPreviewFrameRate != 0;
         Arrays.sort(fpsRanges, new Comparator<Range<Integer>>() {
             @Override
             public int compare(Range<Integer> range1, Range<Integer> range2) {
+                if (ascending) {
                     return (range1.getUpper() - range1.getLower())
                             - (range2.getUpper() - range2.getLower());
-                }
+                } else {
-            });
-        } else { // sort by range width in descending order
-            Arrays.sort(fpsRanges, new Comparator<Range<Integer>>() {
-                @Override
-                public int compare(Range<Integer> range1, Range<Integer> range2) {
                     return (range2.getUpper() - range2.getLower())
                             - (range1.getUpper() - range1.getLower());
                 }
+            }
         });
     }
+
+    @NonNull
+    protected List<Range<Integer>> filterFrameRateRanges(@NonNull Range<Integer>[] fpsRanges) {
+        List<Range<Integer>> results = new ArrayList<>();
+        int min = Math.round(mCameraOptions.getPreviewFrameRateMinValue());
+        int max = Math.round(mCameraOptions.getPreviewFrameRateMaxValue());
+        for (Range<Integer> fpsRange : fpsRanges) {
+            if (!fpsRange.contains(min) && !fpsRange.contains(max)) continue;
+            if (!FpsRangeValidator.validate(fpsRange)) continue;
+            results.add(fpsRange);
+        }
+        return results;
     }
 
     @Override

cameraview/src/main/java/com/otaliastudios/cameraview/engine/CameraBaseEngine.java

@@ -1,7 +1,5 @@
 package com.otaliastudios.cameraview.engine;
 
-import android.graphics.PointF;
-import android.graphics.RectF;
 import android.location.Location;
 
 import androidx.annotation.CallSuper;
@@ -16,6 +14,7 @@ import com.otaliastudios.cameraview.CameraOptions;
 import com.otaliastudios.cameraview.PictureResult;
 import com.otaliastudios.cameraview.VideoResult;
 import com.otaliastudios.cameraview.controls.Audio;
+import com.otaliastudios.cameraview.controls.AudioCodec;
 import com.otaliastudios.cameraview.controls.Facing;
 import com.otaliastudios.cameraview.controls.Flash;
 import com.otaliastudios.cameraview.controls.Hdr;
@@ -27,7 +26,6 @@ import com.otaliastudios.cameraview.engine.offset.Angles;
 import com.otaliastudios.cameraview.engine.offset.Reference;
 import com.otaliastudios.cameraview.engine.orchestrator.CameraState;
 import com.otaliastudios.cameraview.frame.FrameManager;
-import com.otaliastudios.cameraview.gesture.Gesture;
 import com.otaliastudios.cameraview.overlay.Overlay;
 import com.otaliastudios.cameraview.picture.PictureRecorder;
 import com.otaliastudios.cameraview.preview.CameraPreview;
@@ -49,6 +47,9 @@ import java.util.List;
  */
 public abstract class CameraBaseEngine extends CameraEngine {
 
+    protected final static int ALLOWED_ZOOM_OPS = 20;
+    protected final static int ALLOWED_EV_OPS = 20;
+
     @SuppressWarnings("WeakerAccess") protected CameraPreview mPreview;
     @SuppressWarnings("WeakerAccess") protected CameraOptions mCameraOptions;
     @SuppressWarnings("WeakerAccess") protected PictureRecorder mPictureRecorder;
@@ -61,6 +62,7 @@ public abstract class CameraBaseEngine extends CameraEngine {
     @SuppressWarnings("WeakerAccess") protected Flash mFlash;
     @SuppressWarnings("WeakerAccess") protected WhiteBalance mWhiteBalance;
     @SuppressWarnings("WeakerAccess") protected VideoCodec mVideoCodec;
+    @SuppressWarnings("WeakerAccess") protected AudioCodec mAudioCodec;
     @SuppressWarnings("WeakerAccess") protected Hdr mHdr;
     @SuppressWarnings("WeakerAccess") protected PictureFormat mPictureFormat;
     @SuppressWarnings("WeakerAccess") protected Location mLocation;
@@ -243,6 +245,17 @@ public abstract class CameraBaseEngine extends CameraEngine {
         return mVideoBitRate;
     }
 
+    @Override
+    public final void setAudioCodec(@NonNull AudioCodec codec) {
+        mAudioCodec = codec;
+    }
+
+    @NonNull
+    @Override
+    public final AudioCodec getAudioCodec() {
+        return mAudioCodec;
+    }
+
     @Override
     public final void setAudioBitRate(int audioBitRate) {
         mAudioBitRate = audioBitRate;
@@ -540,16 +553,16 @@ public abstract class CameraBaseEngine extends CameraEngine {
 
     @Override
     public void onPictureShutter(boolean didPlaySound) {
-        getCallback().onShutter(!didPlaySound);
+        getCallback().dispatchOnPictureShutter(!didPlaySound);
     }
 
     @Override
     public void onPictureResult(@Nullable PictureResult.Stub result, @Nullable Exception error) {
         mPictureRecorder = null;
-        if (result != null) {
+        if (result != null && result.data != null) {
             getCallback().dispatchOnPictureTaken(result);
         } else {
-            LOG.e("onPictureResult", "result is null: something went wrong.", error);
+            LOG.e("onPictureResult", "result or data is null: something went wrong.", error);
             getCallback().dispatchError(new CameraException(error,
                     CameraException.REASON_PICTURE_FAILED));
         }
@@ -581,6 +594,7 @@ public abstract class CameraBaseEngine extends CameraEngine {
                 }
                 stub.isSnapshot = false;
                 stub.videoCodec = mVideoCodec;
+                stub.audioCodec = mAudioCodec;
                 stub.location = mLocation;
                 stub.facing = mFacing;
                 stub.audio = mAudio;
@@ -608,6 +622,7 @@ public abstract class CameraBaseEngine extends CameraEngine {
                 stub.file = file;
                 stub.isSnapshot = true;
                 stub.videoCodec = mVideoCodec;
+                stub.audioCodec = mAudioCodec;
                 stub.location = mLocation;
                 stub.facing = mFacing;
                 stub.videoBitRate = mVideoBitRate;

cameraview/src/main/java/com/otaliastudios/cameraview/engine/CameraEngine.java

@@ -17,6 +17,7 @@ import com.otaliastudios.cameraview.CameraException;
 import com.otaliastudios.cameraview.CameraLogger;
 import com.otaliastudios.cameraview.CameraOptions;
 import com.otaliastudios.cameraview.PictureResult;
+import com.otaliastudios.cameraview.controls.AudioCodec;
 import com.otaliastudios.cameraview.controls.PictureFormat;
 import com.otaliastudios.cameraview.engine.orchestrator.CameraOrchestrator;
 import com.otaliastudios.cameraview.engine.orchestrator.CameraState;
@@ -115,7 +116,7 @@ public abstract class CameraEngine implements
         void dispatchOnCameraOpened(@NonNull CameraOptions options);
         void dispatchOnCameraClosed();
         void onCameraPreviewStreamSizeChanged();
-        void onShutter(boolean shouldPlaySound);
+        void dispatchOnPictureShutter(boolean shouldPlaySound);
         void dispatchOnVideoTaken(@NonNull VideoResult.Stub stub);
         void dispatchOnPictureTaken(@NonNull PictureResult.Stub stub);
         void dispatchOnFocusStart(@Nullable Gesture trigger, @NonNull PointF where);
@@ -637,6 +638,9 @@ public abstract class CameraEngine implements
     public abstract void setAudioBitRate(int audioBitRate);
     public abstract int getAudioBitRate();
 
+    public abstract void setAudioCodec(@NonNull AudioCodec codec);
+    @NonNull public abstract AudioCodec getAudioCodec();
+
     public abstract void setSnapshotMaxWidth(int maxWidth);
     public abstract int getSnapshotMaxWidth();
 

cameraview/src/main/java/com/otaliastudios/cameraview/engine/action/LogAction.java

@@ -35,7 +35,7 @@ public class LogAction extends BaseAction {
                 " afState: " + afState + " afTriggerState: " + afTriggerState;
         if (!log.equals(lastLog)) {
             lastLog = log;
-            LOG.v(log);
+            LOG.i(log);
         }
     }
 

cameraview/src/main/java/com/otaliastudios/cameraview/engine/orchestrator/CameraOrchestrator.java

@@ -1,5 +1,6 @@
 package com.otaliastudios.cameraview.engine.orchestrator;
 
+import androidx.annotation.GuardedBy;
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 
@@ -12,9 +13,10 @@ import com.otaliastudios.cameraview.internal.WorkerHandler;
 
 import java.util.ArrayDeque;
 import java.util.ArrayList;
-import java.util.HashMap;
+import java.util.Collections;
+import java.util.HashSet;
 import java.util.List;
-import java.util.Map;
+import java.util.Set;
 import java.util.concurrent.Callable;
 import java.util.concurrent.CancellationException;
 
@@ -40,36 +42,43 @@ public class CameraOrchestrator {
         void handleJobException(@NonNull String job, @NonNull Exception exception);
     }
 
-    protected static class Token {
+    protected static class Job<T> {
         public final String name;
-        public final Task<?> task;
+        public final TaskCompletionSource<T> source = new TaskCompletionSource<>();
+        public final Callable<Task<T>> scheduler;
+        public final boolean dispatchExceptions;
+        public final long startTime;
 
-        private Token(@NonNull String name, @NonNull Task<?> task) {
+        private Job(@NonNull String name, @NonNull Callable<Task<T>> scheduler, boolean dispatchExceptions, long startTime) {
             this.name = name;
-            this.task = task;
+            this.scheduler = scheduler;
-        }
+            this.dispatchExceptions = dispatchExceptions;
-
+            this.startTime = startTime;
-        @Override
-        public boolean equals(@Nullable Object obj) {
-            return obj instanceof Token && ((Token) obj).name.equals(name);
         }
     }
 
     protected final Callback mCallback;
-    protected final ArrayDeque<Token> mJobs = new ArrayDeque<>();
+    protected final ArrayDeque<Job<?>> mJobs = new ArrayDeque<>();
-    protected final Object mLock = new Object();
+    protected boolean mJobRunning = false;
-    private final Map<String, Runnable> mDelayedJobs = new HashMap<>();
+    protected final Object mJobsLock = new Object();
 
     public CameraOrchestrator(@NonNull Callback callback) {
         mCallback = callback;
-        ensureToken();
     }
 
     @NonNull
     public Task<Void> schedule(@NonNull String name,
                                boolean dispatchExceptions,
+                               @NonNull Runnable job) {
+        return scheduleDelayed(name, dispatchExceptions, 0L, job);
+    }
+
+    @NonNull
+    public Task<Void> scheduleDelayed(@NonNull String name,
+                                      boolean dispatchExceptions,
+                                      long minDelay,
                                       @NonNull final Runnable job) {
-        return schedule(name, dispatchExceptions, new Callable<Task<Void>>() {
+        return scheduleInternal(name, dispatchExceptions, minDelay, new Callable<Task<Void>>() {
             @Override
             public Task<Void> call() {
                 job.run();
@@ -78,98 +87,147 @@ public class CameraOrchestrator {
         });
     }
 
-    @SuppressWarnings("unchecked")
     @NonNull
-    public <T> Task<T> schedule(@NonNull final String name,
+    public <T> Task<T> schedule(@NonNull String name,
-                                final boolean dispatchExceptions,
+                                boolean dispatchExceptions,
-                                @NonNull final Callable<Task<T>> job) {
+                                @NonNull Callable<Task<T>> scheduler) {
+        return scheduleInternal(name, dispatchExceptions, 0L, scheduler);
+    }
+
+    @NonNull
+    private <T> Task<T> scheduleInternal(@NonNull String name,
+                                         boolean dispatchExceptions,
+                                         long minDelay,
+                                         @NonNull Callable<Task<T>> scheduler) {
         LOG.i(name.toUpperCase(), "- Scheduling.");
-        final TaskCompletionSource<T> source = new TaskCompletionSource<>();
+        Job<T> job = new Job<>(name, scheduler, dispatchExceptions,
-        final WorkerHandler handler = mCallback.getJobWorker(name);
+                System.currentTimeMillis() + minDelay);
-        synchronized (mLock) {
+        synchronized (mJobsLock) {
-            applyCompletionListener(mJobs.getLast().task, handler,
+            mJobs.addLast(job);
-                    new OnCompleteListener() {
+            sync(minDelay);
+        }
+        return job.source.getTask();
+    }
+
+    @GuardedBy("mJobsLock")
+    private void sync(long after) {
+        // Jumping on the message handler even if after = 0L should avoid StackOverflow errors.
+        mCallback.getJobWorker("_sync").post(after, new Runnable() {
+            @SuppressWarnings("StatementWithEmptyBody")
             @Override
-                public void onComplete(@NonNull Task task) {
+            public void run() {
-                    synchronized (mLock) {
+                Job<?> job = null;
-                        mJobs.removeFirst();
+                synchronized (mJobsLock) {
-                        ensureToken();
+                    if (mJobRunning) {
+                        // Do nothing, job will be picked in executed().
+                    } else {
+                        long now = System.currentTimeMillis();
+                        for (Job<?> candidate : mJobs) {
+                            if (candidate.startTime <= now) {
+                                job = candidate;
+                                break;
+                            }
+                        }
+                        if (job != null) {
+                            mJobRunning = true;
+                        }
+                    }
                 }
+                // This must be out of mJobsLock! See comments in execute().
+                if (job != null) execute(job);
+            }
+        });
+    }
+
+    // Since we use WorkerHandler.run(), the job can end up being executed on the current thread.
+    // For this reason, it's important that this method is never guarded by mJobsLock! Because
+    // all threads can be waiting on that, even the UI thread e.g. through scheduleInternal.
+    private <T> void execute(@NonNull final Job<T> job) {
+        final WorkerHandler worker = mCallback.getJobWorker(job.name);
+        worker.run(new Runnable() {
+            @Override
+            public void run() {
                 try {
-                        LOG.i(name.toUpperCase(), "- Executing.");
+                    LOG.i(job.name.toUpperCase(), "- Executing.");
-                        Task<T> inner = job.call();
+                    Task<T> task = job.scheduler.call();
-                        applyCompletionListener(inner, handler, new OnCompleteListener<T>() {
+                    onComplete(task, worker, new OnCompleteListener<T>() {
                         @Override
                         public void onComplete(@NonNull Task<T> task) {
                             Exception e = task.getException();
                             if (e != null) {
-                                    LOG.w(name.toUpperCase(), "- Finished with ERROR.", e);
+                                LOG.w(job.name.toUpperCase(), "- Finished with ERROR.", e);
-                                    if (dispatchExceptions) {
+                                if (job.dispatchExceptions) {
-                                        mCallback.handleJobException(name, e);
+                                    mCallback.handleJobException(job.name, e);
                                 }
-                                    source.trySetException(e);
+                                job.source.trySetException(e);
                             } else if (task.isCanceled()) {
-                                    LOG.i(name.toUpperCase(), "- Finished because ABORTED.");
+                                LOG.i(job.name.toUpperCase(), "- Finished because ABORTED.");
-                                    source.trySetException(new CancellationException());
+                                job.source.trySetException(new CancellationException());
                             } else {
-                                    LOG.i(name.toUpperCase(), "- Finished.");
+                                LOG.i(job.name.toUpperCase(), "- Finished.");
-                                    source.trySetResult(task.getResult());
+                                job.source.trySetResult(task.getResult());
+                            }
+                            synchronized (mJobsLock) {
+                                executed(job);
                             }
                         }
                     });
                 } catch (Exception e) {
-                        LOG.i(name.toUpperCase(), "- Finished.", e);
+                    LOG.i(job.name.toUpperCase(), "- Finished with ERROR.", e);
-                        if (dispatchExceptions) mCallback.handleJobException(name, e);
+                    if (job.dispatchExceptions) {
-                        source.trySetException(e);
+                        mCallback.handleJobException(job.name, e);
+                    }
+                    job.source.trySetException(e);
+                    synchronized (mJobsLock) {
+                        executed(job);
                     }
                 }
-            });
-            mJobs.addLast(new Token(name, source.getTask()));
             }
-        return source.getTask();
+        });
     }
 
-    public void scheduleDelayed(@NonNull final String name,
+    @GuardedBy("mJobsLock")
-                                long minDelay,
+    private <T> void executed(Job<T> job) {
-                                @NonNull final Runnable runnable) {
+        if (!mJobRunning) {
-        Runnable wrapper = new Runnable() {
+            throw new IllegalStateException("mJobRunning was not true after completing job=" + job.name);
-            @Override
-            public void run() {
-                schedule(name, true, runnable);
-                synchronized (mLock) {
-                    if (mDelayedJobs.containsValue(this)) {
-                        mDelayedJobs.remove(name);
         }
+        mJobRunning = false;
+        mJobs.remove(job);
+        sync(0L);
     }
+
+    public void remove(@NonNull String name) {
+        trim(name, 0);
     }
-        };
+
-        synchronized (mLock) {
+    public void trim(@NonNull String name, int allowed) {
-            mDelayedJobs.put(name, wrapper);
+        synchronized (mJobsLock) {
-            mCallback.getJobWorker(name).post(minDelay, wrapper);
+            List<Job<?>> scheduled = new ArrayList<>();
+            for (Job<?> job : mJobs) {
+                if (job.name.equals(name)) {
+                    scheduled.add(job);
                 }
             }
-
+            LOG.v("trim: name=", name, "scheduled=", scheduled.size(), "allowed=", allowed);
-    public void remove(@NonNull String name) {
+            int existing = Math.max(scheduled.size() - allowed, 0);
-        synchronized (mLock) {
+            if (existing > 0) {
-            if (mDelayedJobs.get(name) != null) {
+                // To remove the oldest ones first, we must reverse the list.
-                //noinspection ConstantConditions
+                // Note that we will potentially remove a job that is being executed: we don't
-                mCallback.getJobWorker(name).remove(mDelayedJobs.get(name));
+                // have a mechanism to cancel the ongoing execution, but it shouldn't be a problem.
-                mDelayedJobs.remove(name);
+                Collections.reverse(scheduled);
+                scheduled = scheduled.subList(0, existing);
+                for (Job<?> job : scheduled) {
+                    mJobs.remove(job);
+                }
             }
-            Token token = new Token(name, Tasks.forResult(null));
-            //noinspection StatementWithEmptyBody
-            while (mJobs.remove(token)) { /* do nothing */ }
-            ensureToken();
         }
     }
 
     public void reset() {
-        synchronized (mLock) {
+        synchronized (mJobsLock) {
-            List<String> all = new ArrayList<>();
+            Set<String> all = new HashSet<>();
-            //noinspection CollectionAddAllCanBeReplacedWithConstructor
+            for (Job<?> job : mJobs) {
-            all.addAll(mDelayedJobs.keySet());
+                all.add(job.name);
-            for (Token token : mJobs) {
-                all.add(token.name);
             }
             for (String job : all) {
                 remove(job);
@@ -177,15 +235,7 @@ public class CameraOrchestrator {
         }
     }
 
-    private void ensureToken() {
+    private static <T> void onComplete(@NonNull final Task<T> task,
-        synchronized (mLock) {
-            if (mJobs.isEmpty()) {
-                mJobs.add(new Token("BASE", Tasks.forResult(null)));
-            }
-        }
-    }
-
-    private static <T> void applyCompletionListener(@NonNull final Task<T> task,
                                        @NonNull WorkerHandler handler,
                                        @NonNull final OnCompleteListener<T> listener) {
         if (task.isComplete()) {

cameraview/src/main/java/com/otaliastudios/cameraview/engine/orchestrator/CameraStateOrchestrator.java

@@ -35,10 +35,10 @@ public class CameraStateOrchestrator extends CameraOrchestrator {
     }
 
     public boolean hasPendingStateChange() {
-        synchronized (mLock) {
+        synchronized (mJobsLock) {
-            for (Token token : mJobs) {
+            for (Job<?> job : mJobs) {
-                if ((token.name.contains(" >> ") || token.name.contains(" << "))
+                if ((job.name.contains(" >> ") || job.name.contains(" << "))
-                        && !token.task.isComplete()) {
+                        && !job.source.getTask().isComplete()) {
                     return true;
                 }
             }
@@ -107,7 +107,7 @@ public class CameraStateOrchestrator extends CameraOrchestrator {
                                         @NonNull final CameraState atLeast,
                                         long delay,
                                         @NonNull final Runnable job) {
-        scheduleDelayed(name, delay, new Runnable() {
+        scheduleDelayed(name, true, delay, new Runnable() {
             @Override
             public void run() {
                 if (getCurrentState().isAtLeast(atLeast)) {

cameraview/src/main/java/com/otaliastudios/cameraview/filter/MultiFilter.java

@@ -48,6 +48,7 @@ public class MultiFilter implements Filter, OneParameterFilter, TwoParameterFilt
     static class State {
         @VisibleForTesting boolean isProgramCreated = false;
         @VisibleForTesting boolean isFramebufferCreated = false;
+        private boolean sizeChanged = false;
         @VisibleForTesting Size size = null;
         private int programHandle = -1;
         private GlFramebuffer outputFramebuffer = null;
@@ -135,8 +136,17 @@ public class MultiFilter implements Filter, OneParameterFilter, TwoParameterFilt
 
     private void maybeCreateFramebuffer(@NonNull Filter filter, boolean isFirst, boolean isLast) {
         State state = states.get(filter);
+        if (isLast) {
             //noinspection ConstantConditions
-        if (state.isFramebufferCreated || isLast) return;
+            state.sizeChanged = false;
+            return;
+        }
+        //noinspection ConstantConditions
+        if (state.sizeChanged) {
+            maybeDestroyFramebuffer(filter);
+            state.sizeChanged = false;
+        }
+        if (!state.isFramebufferCreated) {
             state.isFramebufferCreated = true;
             state.outputTexture = new GlTexture(GLES20.GL_TEXTURE0,
                     GLES20.GL_TEXTURE_2D,
@@ -145,6 +155,7 @@ public class MultiFilter implements Filter, OneParameterFilter, TwoParameterFilt
             state.outputFramebuffer = new GlFramebuffer();
             state.outputFramebuffer.attach(state.outputTexture);
         }
+    }
 
     private void maybeDestroyFramebuffer(@NonNull Filter filter) {
         State state = states.get(filter);
@@ -157,11 +168,13 @@ public class MultiFilter implements Filter, OneParameterFilter, TwoParameterFilt
         state.outputTexture = null;
     }
 
+    // Any thread...
     private void maybeSetSize(@NonNull Filter filter) {
         State state = states.get(filter);
         //noinspection ConstantConditions
         if (size != null && !size.equals(state.size)) {
             state.size = size;
+            state.sizeChanged = true;
             filter.setSize(size.getWidth(), size.getHeight());
         }
     }

cameraview/src/main/java/com/otaliastudios/cameraview/gesture/GestureAction.java

@@ -43,6 +43,15 @@ public enum GestureAction {
      */
     TAKE_PICTURE(2, GestureType.ONE_SHOT),
 
+    /**
+     * When triggered, this action will fire a picture snapshot.
+     * This action can be mapped to one shot gestures:
+     *
+     * - {@link Gesture#TAP}
+     * - {@link Gesture#LONG_TAP}
+     */
+    TAKE_PICTURE_SNAPSHOT(3, GestureType.ONE_SHOT),
+
     /**
      * Zoom control, typically assigned to the pinch gesture.
      * This action can be mapped to continuous gestures:
@@ -51,7 +60,7 @@ public enum GestureAction {
      * - {@link Gesture#SCROLL_HORIZONTAL}
      * - {@link Gesture#SCROLL_VERTICAL}
      */
-    ZOOM(3, GestureType.CONTINUOUS),
+    ZOOM(4, GestureType.CONTINUOUS),
 
     /**
      * Exposure correction control.
@@ -61,7 +70,7 @@ public enum GestureAction {
      * - {@link Gesture#SCROLL_HORIZONTAL}
      * - {@link Gesture#SCROLL_VERTICAL}
      */
-    EXPOSURE_CORRECTION(4, GestureType.CONTINUOUS),
+    EXPOSURE_CORRECTION(5, GestureType.CONTINUOUS),
 
     /**
      * Controls the first parameter of a real-time {@link Filter},
@@ -71,7 +80,7 @@ public enum GestureAction {
      * - {@link Gesture#SCROLL_HORIZONTAL}
      * - {@link Gesture#SCROLL_VERTICAL}
      */
-    FILTER_CONTROL_1(5, GestureType.CONTINUOUS),
+    FILTER_CONTROL_1(6, GestureType.CONTINUOUS),
 
     /**
      * Controls the second parameter of a real-time {@link Filter},
@@ -81,7 +90,7 @@ public enum GestureAction {
      * - {@link Gesture#SCROLL_HORIZONTAL}
      * - {@link Gesture#SCROLL_VERTICAL}
      */
-    FILTER_CONTROL_2(6, GestureType.CONTINUOUS);
+    FILTER_CONTROL_2(7, GestureType.CONTINUOUS);
 
     final static GestureAction DEFAULT_PINCH = NONE;
     final static GestureAction DEFAULT_TAP = NONE;

cameraview/src/main/java/com/otaliastudios/cameraview/internal/FpsRangeValidator.java

@@ -0,0 +1,40 @@
+package com.otaliastudios.cameraview.internal;
+
+import android.os.Build;
+import android.util.Log;
+import android.util.Range;
+
+import androidx.annotation.RequiresApi;
+
+import com.otaliastudios.cameraview.CameraLogger;
+
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+@RequiresApi(21)
+public class FpsRangeValidator {
+
+    private final static CameraLogger LOG = CameraLogger.create("FpsRangeValidator");
+    private final static Map<String, List<Range<Integer>>> sIssues = new HashMap<>();
+
+    static {
+        sIssues.put("Google Pixel 4", Arrays.asList(new Range<>(15, 60)));
+        sIssues.put("Google Pixel 4a", Arrays.asList(new Range<>(15, 60)));
+        sIssues.put("Google Pixel 4 XL", Arrays.asList(new Range<>(15, 60)));
+    }
+
+    public static boolean validate(Range<Integer> range) {
+        LOG.i("Build.MODEL:", Build.MODEL, "Build.BRAND:", Build.BRAND, "Build.MANUFACTURER:", Build.MANUFACTURER);
+        String descriptor = Build.MANUFACTURER + " " + Build.MODEL;
+        List<Range<Integer>> ranges = sIssues.get(descriptor);
+        if (ranges != null && ranges.contains(range)) {
+            LOG.i("Dropping range:", range);
+            return false;
+        }
+        return true;
+    }
+}

cameraview/src/main/java/com/otaliastudios/cameraview/internal/OrientationHelper.java

@@ -1,12 +1,17 @@
 package com.otaliastudios.cameraview.internal;
 
+import android.app.Activity;
 import android.content.Context;
+import android.content.res.Configuration;
 import android.hardware.SensorManager;
 import androidx.annotation.NonNull;
 import androidx.annotation.VisibleForTesting;
 
 import android.hardware.display.DisplayManager;
 import android.os.Build;
+import android.os.Handler;
+import android.os.Looper;
+import android.view.View;
 import android.view.Display;
 import android.view.OrientationEventListener;
 import android.view.Surface;
@@ -16,6 +21,36 @@ import android.view.WindowManager;
  * Helps with keeping track of both device orientation (which changes when device is rotated)
  * and the display offset (which depends on the activity orientation wrt the device default
  * orientation).
+ *
+ * Note: any change in the display offset should restart the camera engine, because it reads
+ * from the angles container at startup and computes size based on that. This is tricky because
+ * activity behavior can differ:
+ *
+ * - if activity is locked to some orientation, {@link #mDisplayOffset} won't change, and
+ *   {@link View#onConfigurationChanged(Configuration)} won't be called.
+ *   The library will work fine.
+ *
+ * - if the activity is unlocked and does NOT handle orientation changes with android:configChanges,
+ *   the actual behavior differs depending on the rotation.
+ *   - the configuration callback is never called, of course.
+ *   - for 90°/-90° rotations, the activity is recreated. Sometime you get {@link #mDisplayOffset}
+ *     callback before destruction, sometimes you don't - in any case it's going to recreate.
+ *   - for 180°/-180°, the activity is NOT recreated! But we can rely on {@link #mDisplayOffset}
+ *     changing with a 180 delta and restart the engine.
+ *
+ * - lastly, if the activity is unlocked and DOES handle orientation changes with android:configChanges,
+ *   as it will often be the case in a modern Compose app,
+ *   - you always get the {@link #mDisplayOffset} callback
+ *   - for 90°/-90° rotations, the view also gets the configuration changed callback.
+ *   - for 180°/-180°, the view won't get it because configuration only cares about portrait vs. landscape.
+ *
+ * In practice, since we don't control the activity and we can't easily inspect the configChanges
+ * flags at runtime, a good solution is to always restart when the display offset changes. We might
+ * do useless restarts in one rare scenario (unlocked, no android:configChanges, 90° rotation,
+ * display offset callback received before destruction) but that's acceptable.
+ *
+ * Tried to avoid that by looking at {@link Activity#isChangingConfigurations()}, but it's always
+ * false by the time the display offset callback is invoked.
  */
 public class OrientationHelper {
 
@@ -24,9 +59,10 @@ public class OrientationHelper {
      */
     public interface Callback {
         void onDeviceOrientationChanged(int deviceOrientation);
-        void onDisplayOffsetChanged(int displayOffset, boolean willRecreate);
+        void onDisplayOffsetChanged();
     }
 
+    private final Handler mHandler = new Handler(Looper.getMainLooper());
     private final Context mContext;
     private final Callback mCallback;
 
@@ -38,6 +74,8 @@ public class OrientationHelper {
     final DisplayManager.DisplayListener mDisplayOffsetListener;
     private int mDisplayOffset = -1;
     
+    private boolean mEnabled;
+
     /**
      * Creates a new orientation helper.
      * @param context a valid context
@@ -82,9 +120,7 @@ public class OrientationHelper {
                     int newDisplayOffset = findDisplayOffset();
                     if (newDisplayOffset != oldDisplayOffset) {
                         mDisplayOffset = newDisplayOffset;
-                        // With 180 degrees flips, the activity is not recreated.
+                        mCallback.onDisplayOffsetChanged();
-                        boolean willRecreate = Math.abs(newDisplayOffset - oldDisplayOffset) != 180;
-                        mCallback.onDisplayOffsetChanged(newDisplayOffset, willRecreate);
                     }
                 }
             };
@@ -97,11 +133,14 @@ public class OrientationHelper {
      * Enables this listener.
      */
     public void enable() {
+        if (mEnabled) return;
+        mEnabled = true;
         mDisplayOffset = findDisplayOffset();
         if (Build.VERSION.SDK_INT >= 17) {
             DisplayManager manager = (DisplayManager)
                     mContext.getSystemService(Context.DISPLAY_SERVICE);
-            manager.registerDisplayListener(mDisplayOffsetListener, null);
+            // Without the handler, this can crash if called from a thread without a looper
+            manager.registerDisplayListener(mDisplayOffsetListener, mHandler);
         }
         mDeviceOrientationListener.enable();
     }
@@ -110,6 +149,8 @@ public class OrientationHelper {
      * Disables this listener.
      */
     public void disable() {
+        if (!mEnabled) return;
+        mEnabled = false;
         mDeviceOrientationListener.disable();
         if (Build.VERSION.SDK_INT >= 17) {
             DisplayManager manager = (DisplayManager)

cameraview/src/main/java/com/otaliastudios/cameraview/overlay/Overlay.java

@@ -30,4 +30,18 @@ public interface Overlay {
      * @return true to draw on it
      */
     boolean drawsOn(@NonNull Target target);
+
+    /**
+     * Sets the overlay renderer to lock and capture the hardware canvas in order
+     * to capture hardware accelerated views such as video players
+     *
+     * @param on enabled
+     */
+    void setHardwareCanvasEnabled(boolean on);
+
+    /**
+     * Returns true if hardware canvas capture is enabled, false by default
+     * @return true if capturing hardware surfaces
+     */
+    boolean getHardwareCanvasEnabled();
 }

cameraview/src/main/java/com/otaliastudios/cameraview/overlay/OverlayDrawer.java

@@ -6,6 +6,7 @@ import android.graphics.PorterDuff;
 import android.graphics.SurfaceTexture;
 import android.opengl.GLES11Ext;
 import android.opengl.GLES20;
+import android.os.Build;
 import android.view.Surface;
 
 import androidx.annotation.NonNull;
@@ -63,7 +64,12 @@ public class OverlayDrawer {
      */
     public void draw(@NonNull Overlay.Target target) {
         try {
-            final Canvas surfaceCanvas = mSurface.lockCanvas(null);
+            final Canvas surfaceCanvas;
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && mOverlay.getHardwareCanvasEnabled()) {
+                surfaceCanvas = mSurface.lockHardwareCanvas();
+            } else {
+                surfaceCanvas = mSurface.lockCanvas(null);
+            }
             surfaceCanvas.drawColor(Color.TRANSPARENT, PorterDuff.Mode.CLEAR);
             mOverlay.drawOn(target, surfaceCanvas);
             mSurface.unlockCanvasAndPost(surfaceCanvas);

cameraview/src/main/java/com/otaliastudios/cameraview/overlay/OverlayLayout.java

@@ -26,6 +26,8 @@ public class OverlayLayout extends FrameLayout implements Overlay {
 
     @VisibleForTesting Target currentTarget = Target.PREVIEW;
 
+    private boolean mHardwareCanvasEnabled;
+
     /**
      * We set {@link #setWillNotDraw(boolean)} to false even if we don't draw anything.
      * This ensures that the View system will call {@link #draw(Canvas)} on us instead
@@ -99,6 +101,16 @@ public class OverlayLayout extends FrameLayout implements Overlay {
         return false;
     }
 
+    @Override
+    public void setHardwareCanvasEnabled(boolean on) {
+        mHardwareCanvasEnabled = on;
+    }
+
+    @Override
+    public boolean getHardwareCanvasEnabled() {
+        return mHardwareCanvasEnabled;
+    }
+
     /**
      * For {@link Target#PREVIEW}, this method is called by the View hierarchy. We will
      * just forward the call to super.
@@ -132,7 +144,8 @@ public class OverlayLayout extends FrameLayout implements Overlay {
                             "canvas:", canvas.getWidth() + "x" + canvas.getHeight(),
                             "view:", getWidth() + "x" + getHeight(),
                             "widthScale:", widthScale,
-                            "heightScale:", heightScale
+                            "heightScale:", heightScale,
+                            "hardwareCanvasMode:", mHardwareCanvasEnabled
                     );
                     canvas.scale(widthScale, heightScale);
                     dispatchDraw(canvas);

cameraview/src/main/java/com/otaliastudios/cameraview/picture/Full1PictureRecorder.java

@@ -1,13 +1,18 @@
 package com.otaliastudios.cameraview.picture;
 
 import android.hardware.Camera;
+import android.util.Log;
 
+import androidx.annotation.NonNull;
+import androidx.exifinterface.media.ExifInterface;
+
+import com.otaliastudios.cameraview.CameraException;
 import com.otaliastudios.cameraview.PictureResult;
 import com.otaliastudios.cameraview.engine.Camera1Engine;
+import com.otaliastudios.cameraview.engine.offset.Reference;
+import com.otaliastudios.cameraview.engine.orchestrator.CameraState;
 import com.otaliastudios.cameraview.internal.ExifHelper;
-
+import com.otaliastudios.cameraview.size.Size;
-import androidx.annotation.NonNull;
-import androidx.exifinterface.media.ExifInterface;
 
 import java.io.ByteArrayInputStream;
 import java.io.IOException;
@@ -40,6 +45,8 @@ public class Full1PictureRecorder extends FullPictureRecorder {
         // Stopping the preview callback is important on older APIs / emulators,
         // or takePicture can hang and leave the camera in a bad state.
         mCamera.setPreviewCallbackWithBuffer(null);
+        mEngine.getFrameManager().release();
+        try {
             mCamera.takePicture(
                     new Camera.ShutterCallback() {
                         @Override
@@ -67,13 +74,34 @@ public class Full1PictureRecorder extends FullPictureRecorder {
                             mResult.data = data;
                             mResult.rotation = exifRotation;
                             LOG.i("take(): starting preview again. ", Thread.currentThread());
+
+                            // It's possible that by the time this callback is invoked, we're not previewing
+                            // anymore, so check before restarting preview.
+                            if (mEngine.getState().isAtLeast(CameraState.PREVIEW)) {
                                 camera.setPreviewCallbackWithBuffer(mEngine);
-                        camera.startPreview(); // This is needed, read somewhere in the docs.
+                                Size previewStreamSize = mEngine.getPreviewStreamSize(Reference.SENSOR);
+                                if (previewStreamSize == null) {
+                                    throw new IllegalStateException("Preview stream size " +
+                                            "should never be null here.");
+                                }
+                                // Need to re-setup the frame manager, otherwise no frames are processed
+                                // after takePicture() is called
+                                mEngine.getFrameManager().setUp(
+                                        mEngine.getFrameProcessingFormat(),
+                                        previewStreamSize,
+                                        mEngine.getAngles()
+                                );
+                                camera.startPreview();
+                            }
                             dispatchResult();
                         }
                     }
             );
             LOG.i("take() returned.");
+        } catch (Exception e) {
+            mError = e;
+            dispatchResult();
+        }
     }
 
     @Override

cameraview/src/main/java/com/otaliastudios/cameraview/picture/Full2PictureRecorder.java

@@ -8,6 +8,7 @@ import android.hardware.camera2.TotalCaptureResult;
 import android.media.Image;
 import android.media.ImageReader;
 import android.os.Build;
+import android.util.Log;
 
 import com.otaliastudios.cameraview.PictureResult;
 import com.otaliastudios.cameraview.controls.PictureFormat;
@@ -86,7 +87,13 @@ public class Full2PictureRecorder extends FullPictureRecorder
             public void onCaptureCompleted(@NonNull ActionHolder holder,
                                            @NonNull CaptureRequest request,
                                            @NonNull TotalCaptureResult result) {
+                try {
                     super.onCaptureCompleted(holder, request, result);
+                } catch (Exception e) {
+                    mError = e;
+                    dispatchResult();
+                }
+
                 if (mResult.format == PictureFormat.DNG) {
                     mDngCreator = new DngCreator(holder.getCharacteristics(this), result);
                     mDngCreator.setOrientation(ExifHelper.getExifOrientation(mResult.rotation));

cameraview/src/main/java/com/otaliastudios/cameraview/picture/Snapshot2PictureRecorder.java

@@ -18,7 +18,7 @@ import com.otaliastudios.cameraview.engine.action.Actions;
 import com.otaliastudios.cameraview.engine.action.BaseAction;
 import com.otaliastudios.cameraview.engine.action.CompletionCallback;
 import com.otaliastudios.cameraview.engine.lock.LockAction;
-import com.otaliastudios.cameraview.preview.GlCameraPreview;
+import com.otaliastudios.cameraview.preview.RendererCameraPreview;
 import com.otaliastudios.cameraview.size.AspectRatio;
 
 /**
@@ -107,9 +107,9 @@ public class Snapshot2PictureRecorder extends SnapshotGlPictureRecorder {
 
     public Snapshot2PictureRecorder(@NonNull PictureResult.Stub stub,
                                     @NonNull Camera2Engine engine,
-                                    @NonNull GlCameraPreview preview,
+                                    @NonNull RendererCameraPreview preview,
                                     @NonNull AspectRatio outputRatio) {
-        super(stub, engine, preview, outputRatio);
+        super(stub, engine, preview, outputRatio, engine.getOverlay());
         mHolder = engine;
 
         mAction = Actions.sequence(

cameraview/src/main/java/com/otaliastudios/cameraview/picture/SnapshotGlPictureRecorder.java

@@ -12,14 +12,11 @@ import android.os.Build;
 import com.otaliastudios.cameraview.PictureResult;
 import com.otaliastudios.cameraview.internal.GlTextureDrawer;
 import com.otaliastudios.cameraview.overlay.Overlay;
-import com.otaliastudios.cameraview.controls.Facing;
-import com.otaliastudios.cameraview.engine.CameraEngine;
-import com.otaliastudios.cameraview.engine.offset.Axis;
 import com.otaliastudios.cameraview.engine.offset.Reference;
 import com.otaliastudios.cameraview.internal.CropHelper;
 import com.otaliastudios.cameraview.internal.WorkerHandler;
 import com.otaliastudios.cameraview.overlay.OverlayDrawer;
-import com.otaliastudios.cameraview.preview.GlCameraPreview;
+import com.otaliastudios.cameraview.preview.RendererCameraPreview;
 import com.otaliastudios.cameraview.preview.RendererFrameCallback;
 import com.otaliastudios.cameraview.preview.RendererThread;
 import com.otaliastudios.cameraview.filter.Filter;
@@ -30,13 +27,14 @@ import com.otaliastudios.opengl.surface.EglSurface;
 import com.otaliastudios.opengl.surface.EglWindowSurface;
 
 import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
 import androidx.annotation.WorkerThread;
 
 import android.view.Surface;
 
 /**
  * API 19.
- * Records a picture snapshots from the {@link GlCameraPreview}. It works as follows:
+ * Records a picture snapshots from the {@link RendererCameraPreview}. It works as follows:
  *
  * - We register a one time {@link RendererFrameCallback} on the preview
  * - We get the textureId and the frame callback on the {@link RendererThread}
@@ -55,8 +53,7 @@ import android.view.Surface;
  */
 public class SnapshotGlPictureRecorder extends SnapshotPictureRecorder {
 
-    private CameraEngine mEngine;
+    private RendererCameraPreview mPreview;
-    private GlCameraPreview mPreview;
     private AspectRatio mOutputRatio;
 
     private Overlay mOverlay;
@@ -66,14 +63,14 @@ public class SnapshotGlPictureRecorder extends SnapshotPictureRecorder {
 
     public SnapshotGlPictureRecorder(
             @NonNull PictureResult.Stub stub,
-            @NonNull CameraEngine engine,
+            @Nullable PictureResultListener listener,
-            @NonNull GlCameraPreview preview,
+            @NonNull RendererCameraPreview preview,
-            @NonNull AspectRatio outputRatio) {
+            @NonNull AspectRatio outputRatio,
-        super(stub, engine);
+            @Nullable Overlay overlay) {
-        mEngine = engine;
+        super(stub, listener);
         mPreview = preview;
         mOutputRatio = outputRatio;
-        mOverlay = engine.getOverlay();
+        mOverlay = overlay;
         mHasOverlay = mOverlay != null && mOverlay.drawsOn(Overlay.Target.PICTURE_SNAPSHOT);
     }
 
@@ -96,10 +93,10 @@ public class SnapshotGlPictureRecorder extends SnapshotPictureRecorder {
             @RendererThread
             @Override
             public void onRendererFrame(@NonNull SurfaceTexture surfaceTexture,
-                                        final float scaleX,
+                                        int rotation, float scaleX, float scaleY) {
-                                        final float scaleY) {
                 mPreview.removeRendererFrameCallback(this);
-                SnapshotGlPictureRecorder.this.onRendererFrame(surfaceTexture, scaleX, scaleY);
+                SnapshotGlPictureRecorder.this.onRendererFrame(surfaceTexture,
+                        rotation, scaleX, scaleY);
             }
 
         });
@@ -129,18 +126,17 @@ public class SnapshotGlPictureRecorder extends SnapshotPictureRecorder {
     @RendererThread
     @TargetApi(Build.VERSION_CODES.KITKAT)
     protected void onRendererFrame(@SuppressWarnings("unused") @NonNull final SurfaceTexture surfaceTexture,
+                                 final int rotation,
                                  final float scaleX,
                                  final float scaleY) {
         // Get egl context from the RendererThread, which is the one in which we have created
         // the textureId and the overlayTextureId, managed by the GlSurfaceView.
         // Next operations can then be performed on different threads using this handle.
         final EGLContext eglContext = EGL14.eglGetCurrentContext();
-        // Calling this invalidates the rotation/scale logic below:
-        // surfaceTexture.getTransformMatrix(mTransform); // TODO activate and fix the logic.
         WorkerHandler.execute(new Runnable() {
             @Override
             public void run() {
-                takeFrame(surfaceTexture, scaleX, scaleY, eglContext);
+                takeFrame(surfaceTexture, rotation, scaleX, scaleY, eglContext);
 
             }
         });
@@ -173,6 +169,7 @@ public class SnapshotGlPictureRecorder extends SnapshotPictureRecorder {
     @WorkerThread
     @TargetApi(Build.VERSION_CODES.KITKAT)
     protected void takeFrame(@NonNull SurfaceTexture surfaceTexture,
+                             int rotation,
                              float scaleX,
                              float scaleY,
                              @NonNull EGLContext eglContext) {
@@ -189,22 +186,18 @@ public class SnapshotGlPictureRecorder extends SnapshotPictureRecorder {
         eglSurface.makeCurrent();
         final float[] transform = mTextureDrawer.getTextureTransform();
 
-        // 2. Apply scale and crop
+        // 2. Apply preview transformations
-        boolean flip = mEngine.getAngles().flip(Reference.VIEW, Reference.SENSOR);
+        surfaceTexture.getTransformMatrix(transform);
-        float realScaleX = flip ? scaleY : scaleX;
+        float scaleTranslX = (1F - scaleX) / 2F;
-        float realScaleY = flip ? scaleX : scaleY;
+        float scaleTranslY = (1F - scaleY) / 2F;
-        float scaleTranslX = (1F - realScaleX) / 2F;
-        float scaleTranslY = (1F - realScaleY) / 2F;
         Matrix.translateM(transform, 0, scaleTranslX, scaleTranslY, 0);
-        Matrix.scaleM(transform, 0, realScaleX, realScaleY, 1);
+        Matrix.scaleM(transform, 0, scaleX, scaleY, 1);
 
         // 3. Apply rotation and flip
+        // If this doesn't work, rotate "rotation" before scaling, like GlCameraPreview does.
         Matrix.translateM(transform, 0, 0.5F, 0.5F, 0); // Go back to 0,0
-        Matrix.rotateM(transform, 0, -mResult.rotation, 0, 0, 1); // Rotate (not sure why we need the minus)
+        Matrix.rotateM(transform, 0, rotation + mResult.rotation, 0, 0, 1); // Rotate to OUTPUT
-        mResult.rotation = 0;
+        Matrix.scaleM(transform, 0, 1, -1, 1); // Vertical flip because we'll use glReadPixels
-        if (mResult.facing == Facing.FRONT) { // 5. Flip horizontally for front camera
-            Matrix.scaleM(transform, 0, -1, 1, 1);
-        }
         Matrix.translateM(transform, 0, -0.5F, -0.5F, 0); // Go back to old position
 
         // 4. Do pretty much the same for overlays
@@ -213,13 +206,12 @@ public class SnapshotGlPictureRecorder extends SnapshotPictureRecorder {
             mOverlayDrawer.draw(Overlay.Target.PICTURE_SNAPSHOT);
 
             // 2. Then we can apply the transformations
-            int rotation = mEngine.getAngles().offset(Reference.VIEW, Reference.OUTPUT, Axis.ABSOLUTE);
             Matrix.translateM(mOverlayDrawer.getTransform(), 0, 0.5F, 0.5F, 0);
-            Matrix.rotateM(mOverlayDrawer.getTransform(), 0, rotation, 0, 0, 1);
+            Matrix.rotateM(mOverlayDrawer.getTransform(), 0, mResult.rotation, 0, 0, 1);
-            // No need to flip the x axis for front camera, but need to flip the y axis always.
+            Matrix.scaleM(mOverlayDrawer.getTransform(), 0, 1, -1, 1); // Vertical flip because we'll use glReadPixels
-            Matrix.scaleM(mOverlayDrawer.getTransform(), 0, 1, -1, 1);
             Matrix.translateM(mOverlayDrawer.getTransform(), 0, -0.5F, -0.5F, 0);
         }
+        mResult.rotation = 0;
 
         // 5. Draw and save
         long timestampUs = surfaceTexture.getTimestamp() / 1000L;
@@ -239,7 +231,6 @@ public class SnapshotGlPictureRecorder extends SnapshotPictureRecorder {
 
     @Override
     protected void dispatchResult() {
-        mEngine = null;
         mOutputRatio = null;
         super.dispatchResult();
     }

cameraview/src/main/java/com/otaliastudios/cameraview/preview/CameraPreview.java

@@ -18,6 +18,7 @@ import com.google.android.gms.tasks.TaskCompletionSource;
 import com.google.android.gms.tasks.Tasks;
 import com.otaliastudios.cameraview.CameraLogger;
 import com.otaliastudios.cameraview.engine.CameraEngine;
+import com.otaliastudios.cameraview.engine.offset.Reference;
 import com.otaliastudios.cameraview.size.Size;
 
 /**
@@ -62,18 +63,24 @@ public abstract class CameraPreview<T extends View, Output> {
     @VisibleForTesting CropCallback mCropCallback;
     private SurfaceCallback mSurfaceCallback;
     private T mView;
-    boolean mCropping;
+    @SuppressWarnings("WeakerAccess")
+    protected boolean mCropping;
 
     // These are the surface dimensions in REF_VIEW.
-    int mOutputSurfaceWidth;
+    @SuppressWarnings("WeakerAccess")
-    int mOutputSurfaceHeight;
+    protected int mOutputSurfaceWidth;
+    @SuppressWarnings("WeakerAccess")
+    protected int mOutputSurfaceHeight;
 
     // These are the preview stream dimensions, in REF_VIEW.
-    int mInputStreamWidth;
+    @SuppressWarnings("WeakerAccess")
-    int mInputStreamHeight;
+    protected int mInputStreamWidth;
+    @SuppressWarnings("WeakerAccess")
+    protected int mInputStreamHeight;
 
     // The rotation, if any, to be applied when drawing.
-    int mDrawRotation;
+    @SuppressWarnings("WeakerAccess")
+    protected int mDrawRotation;
 
     /**
      * Creates a new preview.
@@ -88,7 +95,7 @@ public abstract class CameraPreview<T extends View, Output> {
      * Sets a callback to be notified of surface events (creation, change, destruction)
      * @param callback a callback
      */
-    public final void setSurfaceCallback(@Nullable SurfaceCallback callback) {
+    public void setSurfaceCallback(@Nullable SurfaceCallback callback) {
         if (hasSurface() && mSurfaceCallback != null) {
             mSurfaceCallback.onSurfaceDestroyed();
         }
@@ -124,9 +131,8 @@ public abstract class CameraPreview<T extends View, Output> {
      * @return the root view
      */
     @SuppressWarnings("unused")
-    @VisibleForTesting
     @NonNull
-    abstract View getRootView();
+    public abstract View getRootView();
 
     /**
      * Returns the output surface object (for example a SurfaceHolder
@@ -162,7 +168,7 @@ public abstract class CameraPreview<T extends View, Output> {
      * Returns the current input stream size, in view coordinates.
      * @return the current input stream size
      */
-    @SuppressWarnings("unused")
+    @VisibleForTesting
     @NonNull
     final Size getStreamSize() {
         return new Size(mInputStreamWidth, mInputStreamHeight);
@@ -326,11 +332,15 @@ public abstract class CameraPreview<T extends View, Output> {
      * Sometimes we don't need this:
      * - In Camera1, the buffer producer sets our Surface size and rotates it based on the value
      *   that we pass to {@link android.hardware.Camera.Parameters#setDisplayOrientation(int)},
-     *   so the stream that comes in is already rotated.
+     *   so the stream that comes in is already rotated (if we apply SurfaceTexture transform).
      * - In Camera2, for {@link android.view.SurfaceView} based previews, apparently it just works
      *   out of the box. The producer might be doing something similar.
      *
      * But in all the other Camera2 cases, we need to apply this rotation when drawing the surface.
+     * Seems that Camera1 can correctly rotate the stream/transform to {@link Reference#VIEW},
+     * while Camera2, that does not have any rotation API, will only rotate to {@link Reference#BASE}.
+     * That's why in Camera2 this angle is set as the offset between BASE and VIEW.
+     *
      * @param drawRotation the rotation in degrees
      */
     public void setDrawRotation(int drawRotation) {

cameraview/src/main/java/com/otaliastudios/cameraview/preview/FilterCameraPreview.java

@@ -16,18 +16,13 @@ import com.otaliastudios.cameraview.filter.Filter;
  * The preview has the responsibility of calling {@link Filter#setSize(int, int)}
  * whenever the preview size changes and as soon as the filter is applied.
  */
-public abstract class FilterCameraPreview<T extends View, Output> extends CameraPreview<T, Output> {
+public interface FilterCameraPreview {
-
-    @SuppressWarnings("WeakerAccess")
-    public FilterCameraPreview(@NonNull Context context, @NonNull ViewGroup parent) {
-        super(context, parent);
-    }
 
     /**
      * Sets a new filter.
      * @param filter new filter
      */
-    public abstract void setFilter(@NonNull Filter filter);
+    void setFilter(@NonNull Filter filter);
 
     /**
      * Returns the currently used filter.
@@ -35,5 +30,5 @@ public abstract class FilterCameraPreview<T extends View, Output> extends Camera
      */
     @SuppressWarnings("unused")
     @NonNull
-    public abstract Filter getCurrentFilter();
+    Filter getCurrentFilter();
 }

cameraview/src/main/java/com/otaliastudios/cameraview/preview/GlCameraPreview.java

@@ -60,7 +60,8 @@ import javax.microedition.khronos.opengles.GL10;
  * which means that we can fetch the GL context that was created and is managed
  * by the {@link GLSurfaceView}.
  */
-public class GlCameraPreview extends FilterCameraPreview<GLSurfaceView, SurfaceTexture> {
+public class GlCameraPreview extends CameraPreview<GLSurfaceView, SurfaceTexture>
+        implements FilterCameraPreview, RendererCameraPreview {
 
     private boolean mDispatched;
     private SurfaceTexture mInputSurfaceTexture;
@@ -110,7 +111,7 @@ public class GlCameraPreview extends FilterCameraPreview<GLSurfaceView, SurfaceT
 
     @NonNull
     @Override
-    View getRootView() {
+    public View getRootView() {
         return mRootView;
     }
 
@@ -232,7 +233,7 @@ public class GlCameraPreview extends FilterCameraPreview<GLSurfaceView, SurfaceT
 
             mOutputTextureDrawer.draw(mInputSurfaceTexture.getTimestamp() / 1000L);
             for (RendererFrameCallback callback : mRendererFrameCallbacks) {
-                callback.onRendererFrame(mInputSurfaceTexture, mCropScaleX, mCropScaleY);
+                callback.onRendererFrame(mInputSurfaceTexture, mDrawRotation, mCropScaleX, mCropScaleY);
             }
         }
     }
@@ -289,11 +290,7 @@ public class GlCameraPreview extends FilterCameraPreview<GLSurfaceView, SurfaceT
         if (callback != null) callback.onCrop();
     }
 
-    /**
+    @Override
-     * Method specific to the GL preview. Adds a {@link RendererFrameCallback}
-     * to receive renderer frame events.
-     * @param callback a callback
-     */
     public void addRendererFrameCallback(@NonNull final RendererFrameCallback callback) {
         getView().queueEvent(new Runnable() {
             @Override
@@ -308,11 +305,7 @@ public class GlCameraPreview extends FilterCameraPreview<GLSurfaceView, SurfaceT
         });
     }
 
-    /**
+    @Override
-     * Method specific to the GL preview. Removes a {@link RendererFrameCallback}
-     * that was previously added to receive renderer frame events.
-     * @param callback a callback
-     */
     public void removeRendererFrameCallback(@NonNull final RendererFrameCallback callback) {
         mRendererFrameCallbacks.remove(callback);
     }

cameraview/src/main/java/com/otaliastudios/cameraview/preview/RendererCameraPreview.java

@@ -0,0 +1,23 @@
+package com.otaliastudios.cameraview.preview;
+
+import androidx.annotation.NonNull;
+
+/**
+ * Base interface for previews that support renderer frame callbacks,
+ * see {@link RendererFrameCallback}.
+ */
+public interface RendererCameraPreview {
+
+    /**
+     * Adds a {@link RendererFrameCallback} to receive renderer frame events.
+     * @param callback a callback
+     */
+    void addRendererFrameCallback(@NonNull final RendererFrameCallback callback);
+
+    /**
+     * Removes a {@link RendererFrameCallback} that was previously added to receive renderer
+     * frame events.
+     * @param callback a callback
+     */
+    void removeRendererFrameCallback(@NonNull final RendererFrameCallback callback);
+}

cameraview/src/main/java/com/otaliastudios/cameraview/preview/RendererFrameCallback.java

@@ -24,17 +24,17 @@ public interface RendererFrameCallback {
      * Called on the renderer thread after each frame was drawn.
      * You are not supposed to hold for too long onto this thread, because
      * well, it is the rendering thread.
-     *
      * @param surfaceTexture the texture to get transformation
+     * @param rotation the rotation (to reach REF_VIEW)
      * @param scaleX the scaleX (in REF_VIEW) value
      * @param scaleY the scaleY (in REF_VIEW) value
      */
     @RendererThread
-    void onRendererFrame(@NonNull SurfaceTexture surfaceTexture, float scaleX, float scaleY);
+    void onRendererFrame(@NonNull SurfaceTexture surfaceTexture, int rotation, float scaleX, float scaleY);
 
     /**
      * Called when the renderer filter changes. This is guaranteed to be called at least once
-     * before the first {@link #onRendererFrame(SurfaceTexture, float, float)}.
+     * before the first {@link #onRendererFrame(SurfaceTexture, int, float, float)}.
      *
      * @param filter the new filter
      */

cameraview/src/main/java/com/otaliastudios/cameraview/preview/SurfaceCameraPreview.java

@@ -46,6 +46,7 @@ public class SurfaceCameraPreview extends CameraPreview<SurfaceView, SurfaceHold
             public void surfaceCreated(SurfaceHolder holder) {
                 // This is too early to call anything.
                 // surfaceChanged is guaranteed to be called after, with exact dimensions.
+                LOG.i("callback: surfaceCreated.");
             }
 
             @Override
@@ -64,7 +65,7 @@ public class SurfaceCameraPreview extends CameraPreview<SurfaceView, SurfaceHold
 
             @Override
             public void surfaceDestroyed(SurfaceHolder holder) {
-                LOG.i("callback:", "surfaceDestroyed");
+                LOG.i("callback: surfaceDestroyed");
                 dispatchOnSurfaceDestroyed();
                 mDispatched = false;
             }
@@ -75,7 +76,7 @@ public class SurfaceCameraPreview extends CameraPreview<SurfaceView, SurfaceHold
 
     @NonNull
     @Override
-    View getRootView() {
+    public View getRootView() {
         return mRootView;
     }
 

cameraview/src/main/java/com/otaliastudios/cameraview/preview/TextureCameraPreview.java

@@ -68,7 +68,7 @@ public class TextureCameraPreview extends CameraPreview<TextureView, SurfaceText
 
     @NonNull
     @Override
-    View getRootView() {
+    public View getRootView() {
         return mRootView;
     }
 

cameraview/src/main/java/com/otaliastudios/cameraview/size/AspectRatio.java

@@ -33,8 +33,8 @@ public class AspectRatio implements Comparable<AspectRatio> {
     @NonNull
     public static AspectRatio of(int x, int y) {
         int gcd = gcd(x, y);
-        x /= gcd;
+        if (gcd > 0) x /= gcd;
-        y /= gcd;
+        if (gcd > 0) y /= gcd;
         String key = x + ":" + y;
         AspectRatio cached = sCache.get(key);
         if (cached == null) {
@@ -58,8 +58,8 @@ public class AspectRatio implements Comparable<AspectRatio> {
         if (parts.length != 2) {
             throw new NumberFormatException("Illegal AspectRatio string. Must be x:y");
         }
-        int x = Integer.valueOf(parts[0]);
+        int x = Integer.parseInt(parts[0]);
-        int y = Integer.valueOf(parts[1]);
+        int y = Integer.parseInt(parts[1]);
         return of(x, y);
     }
 
@@ -80,14 +80,11 @@ public class AspectRatio implements Comparable<AspectRatio> {
     }
 
     public boolean matches(@NonNull Size size) {
-        int gcd = gcd(size.getWidth(), size.getHeight());
+        return equals(AspectRatio.of(size));
-        int x = size.getWidth() / gcd;
-        int y = size.getHeight() / gcd;
-        return mX == x && mY == y;
     }
 
     public boolean matches(@NonNull Size size, float tolerance) {
-        return Math.abs(toFloat() - (float) size.getWidth() / size.getHeight()) <= tolerance;
+        return Math.abs(toFloat() - AspectRatio.of(size).toFloat()) <= tolerance;
     }
 
     @Override
@@ -99,8 +96,7 @@ public class AspectRatio implements Comparable<AspectRatio> {
             return true;
         }
         if (o instanceof AspectRatio) {
-            AspectRatio ratio = (AspectRatio) o;
+            return toFloat() == ((AspectRatio) o).toFloat();
-            return mX == ratio.mX && mY == ratio.mY;
         }
         return false;
     }
@@ -117,17 +113,12 @@ public class AspectRatio implements Comparable<AspectRatio> {
 
     @Override
     public int hashCode() {
-        return mY ^ ((mX << (Integer.SIZE / 2)) | (mX >>> (Integer.SIZE / 2)));
+        return Float.floatToIntBits(toFloat());
     }
 
     @Override
     public int compareTo(@NonNull AspectRatio another) {
-        if (equals(another)) {
+        return Float.compare(toFloat(), another.toFloat());
-            return 0;
-        } else if (toFloat() - another.toFloat() > 0) {
-            return 1;
-        }
-        return -1;
     }
 
     /**
@@ -140,6 +131,7 @@ public class AspectRatio implements Comparable<AspectRatio> {
         return AspectRatio.of(mY, mX);
     }
 
+    // Note: gcd(0,X) = gcd(X,0) = X (even for X=0)
     private static int gcd(int a, int b) {
         while (b != 0) {
             int c = b;

cameraview/src/main/java/com/otaliastudios/cameraview/video/FullVideoRecorder.java

@@ -2,10 +2,12 @@ package com.otaliastudios.cameraview.video;
 
 import android.media.CamcorderProfile;
 import android.media.MediaRecorder;
+import android.os.Build;
 
 import com.otaliastudios.cameraview.CameraLogger;
 import com.otaliastudios.cameraview.VideoResult;
 import com.otaliastudios.cameraview.controls.Audio;
+import com.otaliastudios.cameraview.controls.AudioCodec;
 import com.otaliastudios.cameraview.controls.VideoCodec;
 import com.otaliastudios.cameraview.internal.DeviceEncoders;
 import com.otaliastudios.cameraview.internal.CamcorderProfiles;
@@ -13,6 +15,7 @@ import com.otaliastudios.cameraview.size.Size;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
+import androidx.annotation.RequiresApi;
 
 /**
  * A {@link VideoRecorder} that uses {@link android.media.MediaRecorder} APIs.
@@ -105,6 +108,16 @@ public abstract class FullVideoRecorder extends VideoRecorder {
             mProfile.videoCodec = MediaRecorder.VideoEncoder.H263;
             mProfile.fileFormat = MediaRecorder.OutputFormat.MPEG_4; // should work
         }
+        // Set audio codec if the user has specified a specific codec.
+        if (stub.audioCodec == AudioCodec.AAC) {
+            mProfile.audioCodec = MediaRecorder.AudioEncoder.AAC;
+        } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN
+                && stub.audioCodec == AudioCodec.HE_AAC) {
+            mProfile.audioCodec = MediaRecorder.AudioEncoder.HE_AAC;
+        } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN
+                && stub.audioCodec == AudioCodec.AAC_ELD) {
+            mProfile.audioCodec = MediaRecorder.AudioEncoder.AAC_ELD;
+        }
         mMediaRecorder.setOutputFormat(mProfile.fileFormat);
 
         // 4. Update the VideoResult stub with information from the profile, if the

cameraview/src/main/java/com/otaliastudios/cameraview/video/SnapshotVideoRecorder.java

@@ -1,17 +1,20 @@
 package com.otaliastudios.cameraview.video;
 
 import android.graphics.SurfaceTexture;
+import android.media.MediaFormat;
+import android.media.MediaRecorder;
 import android.opengl.EGL14;
 import android.os.Build;
 
 import com.otaliastudios.cameraview.CameraLogger;
+import com.otaliastudios.cameraview.controls.AudioCodec;
 import com.otaliastudios.cameraview.internal.DeviceEncoders;
 import com.otaliastudios.cameraview.overlay.Overlay;
 import com.otaliastudios.cameraview.VideoResult;
 import com.otaliastudios.cameraview.controls.Audio;
 import com.otaliastudios.cameraview.engine.CameraEngine;
 import com.otaliastudios.cameraview.overlay.OverlayDrawer;
-import com.otaliastudios.cameraview.preview.GlCameraPreview;
+import com.otaliastudios.cameraview.preview.RendererCameraPreview;
 import com.otaliastudios.cameraview.preview.RendererFrameCallback;
 import com.otaliastudios.cameraview.preview.RendererThread;
 import com.otaliastudios.cameraview.filter.Filter;
@@ -52,7 +55,7 @@ public class SnapshotVideoRecorder extends VideoRecorder implements RendererFram
 
     private MediaEncoderEngine mEncoderEngine;
     private final Object mEncoderEngineLock = new Object();
-    private GlCameraPreview mPreview;
+    private RendererCameraPreview mPreview;
 
     private int mCurrentState = STATE_NOT_RECORDING;
     private int mDesiredState = STATE_NOT_RECORDING;
@@ -61,19 +64,16 @@ public class SnapshotVideoRecorder extends VideoRecorder implements RendererFram
     private Overlay mOverlay;
     private OverlayDrawer mOverlayDrawer;
     private boolean mHasOverlay;
-    private int mOverlayRotation;
 
     private Filter mCurrentFilter;
 
     public SnapshotVideoRecorder(@NonNull CameraEngine engine,
-                                 @NonNull GlCameraPreview preview,
+                                 @NonNull RendererCameraPreview preview,
-                                 @Nullable Overlay overlay,
+                                 @Nullable Overlay overlay) {
-                                 int overlayRotation) {
         super(engine);
         mPreview = preview;
         mOverlay = overlay;
         mHasOverlay = overlay != null && overlay.drawsOn(Overlay.Target.VIDEO_SNAPSHOT);
-        mOverlayRotation = overlayRotation;
     }
 
     @Override
@@ -126,9 +126,8 @@ public class SnapshotVideoRecorder extends VideoRecorder implements RendererFram
 
     @RendererThread
     @Override
-    public void onRendererFrame(@NonNull SurfaceTexture surfaceTexture,
+    public void onRendererFrame(@NonNull SurfaceTexture surfaceTexture, int rotation,
-                                float scaleX,
+                                float scaleX, float scaleY) {
-                                float scaleY) {
         if (mCurrentState == STATE_NOT_RECORDING && mDesiredState == STATE_RECORDING) {
             LOG.i("Starting the encoder engine.");
 
@@ -145,7 +144,14 @@ public class SnapshotVideoRecorder extends VideoRecorder implements RendererFram
                 case H_264: videoType = "video/avc"; break; // MediaFormat.MIMETYPE_VIDEO_AVC:
                 case DEVICE_DEFAULT: videoType = "video/avc"; break;
             }
-            String audioType = "audio/mp4a-latm";
+            String audioType = "";
+            switch (mResult.audioCodec) {
+                case AAC:
+                case HE_AAC:
+                case AAC_ELD: audioType = "audio/mp4a-latm"; break; // MediaFormat.MIMETYPE_AUDIO_AAC:
+                case DEVICE_DEFAULT: audioType = "audio/mp4a-latm"; break;
+
+            }
             TextureConfig videoConfig = new TextureConfig();
             AudioConfig audioConfig = new AudioConfig();
 
@@ -219,7 +225,7 @@ public class SnapshotVideoRecorder extends VideoRecorder implements RendererFram
             videoConfig.height = mResult.size.getHeight();
             videoConfig.bitRate = mResult.videoBitRate;
             videoConfig.frameRate = mResult.videoFrameRate;
-            videoConfig.rotation = mResult.rotation;
+            videoConfig.rotation = rotation + mResult.rotation;
             videoConfig.mimeType = videoType;
             videoConfig.encoder = deviceEncoders.getVideoEncoder();
             videoConfig.textureId = mTextureId;
@@ -232,13 +238,14 @@ public class SnapshotVideoRecorder extends VideoRecorder implements RendererFram
             if (mHasOverlay) {
                 videoConfig.overlayTarget = Overlay.Target.VIDEO_SNAPSHOT;
                 videoConfig.overlayDrawer = mOverlayDrawer;
-                videoConfig.overlayRotation = mOverlayRotation;
+                videoConfig.overlayRotation = mResult.rotation;
+                // ^ no "rotation" here! Overlays are already in VIEW ref.
             }
             TextureMediaEncoder videoEncoder = new TextureMediaEncoder(videoConfig);
 
             // Adjustment
             mResult.rotation = 0; // We will rotate the result instead.
-            mCurrentFilter.setSize(mResult.size.getWidth(), mResult.size.getWidth());
+            mCurrentFilter.setSize(mResult.size.getWidth(), mResult.size.getHeight());
 
             // Audio
             AudioMediaEncoder audioEncoder = null;

cameraview/src/main/java/com/otaliastudios/cameraview/video/encoding/MediaEncoder.java

@@ -419,12 +419,14 @@ public abstract class MediaEncoder {
             } else if (encoderStatus == MediaCodec.INFO_OUTPUT_FORMAT_CHANGED) {
                 // should happen before receiving buffers, and should only happen once
                 if (mController.isStarted()) {
-                    throw new RuntimeException("MediaFormat changed twice.");
+                    // throw new RuntimeException("MediaFormat changed twice.");
-                }
+                    // Seen this happen in API31. TODO handle differently?
+                } else {
                     MediaFormat newFormat = mMediaCodec.getOutputFormat();
                     mTrackIndex = mController.notifyStarted(newFormat);
                     setState(STATE_STARTED);
                     mOutputBufferPool = new OutputBufferPool(mTrackIndex);
+                }
             } else if (encoderStatus < 0) {
                 LOG.e("Unexpected result from dequeueOutputBuffer: " + encoderStatus);
                 // let's ignore it

cameraview/src/main/java/com/otaliastudios/cameraview/video/encoding/TextureMediaEncoder.java

@@ -218,8 +218,8 @@ public class TextureMediaEncoder extends VideoMediaEncoder<TextureConfig> {
             mConfig.overlayDrawer.draw(mConfig.overlayTarget);
             Matrix.translateM(mConfig.overlayDrawer.getTransform(),
                     0, 0.5F, 0.5F, 0);
-            Matrix.rotateM(mConfig.overlayDrawer.getTransform(), 0, mConfig.overlayRotation,
+            Matrix.rotateM(mConfig.overlayDrawer.getTransform(),
-                    0, 0, 1);
+                    0, mConfig.overlayRotation, 0, 0, 1);
             Matrix.translateM(mConfig.overlayDrawer.getTransform(),
                     0, -0.5F, -0.5F, 0);
         }

cameraview/src/main/res/values/attrs.xml

@@ -40,36 +40,38 @@
             <enum name="none" value="0" />
             <enum name="autoFocus" value="1" />
             <enum name="takePicture" value="2" />
+            <enum name="takePictureSnapshot" value="3" />
         </attr>
 
         <attr name="cameraGestureLongTap" format="enum">
             <enum name="none" value="0" />
             <enum name="autoFocus" value="1" />
             <enum name="takePicture" value="2" />
+            <enum name="takePictureSnapshot" value="3" />
         </attr>
 
         <attr name="cameraGesturePinch" format="enum">
             <enum name="none" value="0" />
-            <enum name="zoom" value="3" />
+            <enum name="zoom" value="4" />
-            <enum name="exposureCorrection" value="4" />
+            <enum name="exposureCorrection" value="5" />
-            <enum name="filterControl1" value="5" />
+            <enum name="filterControl1" value="6" />
-            <enum name="filterControl2" value="6" />
+            <enum name="filterControl2" value="7" />
         </attr>
 
         <attr name="cameraGestureScrollHorizontal" format="enum">
             <enum name="none" value="0" />
-            <enum name="zoom" value="3" />
+            <enum name="zoom" value="4" />
-            <enum name="exposureCorrection" value="4" />
+            <enum name="exposureCorrection" value="5" />
-            <enum name="filterControl1" value="5" />
+            <enum name="filterControl1" value="6" />
-            <enum name="filterControl2" value="6" />
+            <enum name="filterControl2" value="7" />
         </attr>
 
         <attr name="cameraGestureScrollVertical" format="enum">
             <enum name="none" value="0" />
-            <enum name="zoom" value="3" />
+            <enum name="zoom" value="4" />
-            <enum name="exposureCorrection" value="4" />
+            <enum name="exposureCorrection" value="5" />
-            <enum name="filterControl1" value="5" />
+            <enum name="filterControl1" value="6" />
-            <enum name="filterControl2" value="6" />
+            <enum name="filterControl2" value="7" />
         </attr>
 
         <attr name="cameraEngine" format="enum">
@@ -141,6 +143,13 @@
             <enum name="h264" value="2" />
         </attr>
 
+        <attr name="cameraAudioCodec" format="enum">
+            <enum name="deviceDefault" value="0" />
+            <enum name="aac" value="1" />
+            <enum name="heAac" value="2" />
+            <enum name="aacEld" value="3" />
+        </attr>
+
         <attr name="cameraAutoFocusResetDelay" format="integer|reference"/>
 
         <attr name="cameraAutoFocusMarker" format="string|reference"/>
@@ -160,6 +169,8 @@
         <attr name="cameraRequestPermissions" format="boolean|reference"/>
         <attr name="cameraExperimental" format="boolean|reference" />
 
+        <attr name="cameraDrawHardwareOverlays" format="boolean"/>
+
     </declare-styleable>
 
     <declare-styleable name="CameraView_Layout">

demo/build.gradle

@@ -1,27 +0,0 @@
-apply plugin: 'com.android.application'
-
-android {
-    compileSdkVersion rootProject.ext.compileSdkVersion
-
-    defaultConfig {
-        applicationId "com.otaliastudios.cameraview.demo"
-        minSdkVersion rootProject.ext.minSdkVersion
-        targetSdkVersion rootProject.ext.targetSdkVersion
-        versionCode 1
-        versionName "1.0"
-        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
-        vectorDrawables.useSupportLibrary = true
-    }
-    buildTypes {
-        release {
-            minifyEnabled false
-            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
-        }
-    }
-}
-
-dependencies {
-    implementation project(':cameraview')
-    implementation 'androidx.appcompat:appcompat:1.1.0'
-    implementation 'com.google.android.material:material:1.1.0-beta01'
-}

demo/build.gradle.kts

@@ -0,0 +1,23 @@
+plugins {
+    id("com.android.application")
+    id("kotlin-android")
+}
+
+android {
+    compileSdk = property("compileSdkVersion") as Int
+    defaultConfig {
+        applicationId = "com.otaliastudios.cameraview.demo"
+        minSdk = property("minSdkVersion") as Int
+        targetSdk = property("targetSdkVersion") as Int
+        versionCode = 1
+        versionName = "1.0"
+        vectorDrawables.useSupportLibrary = true
+    }
+    sourceSets["main"].java.srcDir("src/main/kotlin")
+}
+
+dependencies {
+    implementation(project(":cameraview"))
+    implementation("androidx.appcompat:appcompat:1.3.1")
+    implementation("com.google.android.material:material:1.4.0")
+}

demo/src/main/AndroidManifest.xml

@@ -16,7 +16,8 @@
         <activity
             android:name=".CameraActivity"
             android:configChanges="screenLayout|keyboardHidden"
-            android:hardwareAccelerated="true">
+            android:hardwareAccelerated="true"
+            android:exported="true">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.LAUNCHER" />

demo/src/main/java/com/otaliastudios/cameraview/demo/CameraActivity.java

@@ -1,417 +0,0 @@
-package com.otaliastudios.cameraview.demo;
-
-import android.animation.ValueAnimator;
-import android.content.Intent;
-import android.content.pm.PackageManager;
-import android.graphics.Bitmap;
-import android.graphics.BitmapFactory;
-import android.graphics.Color;
-import android.graphics.ImageFormat;
-import android.graphics.PointF;
-import android.graphics.Rect;
-import android.graphics.YuvImage;
-import android.os.Bundle;
-import androidx.annotation.NonNull;
-import com.google.android.material.bottomsheet.BottomSheetBehavior;
-
-import androidx.annotation.Nullable;
-import androidx.appcompat.app.AppCompatActivity;
-
-import android.view.View;
-import android.view.ViewGroup;
-import android.view.ViewTreeObserver;
-import android.widget.Toast;
-
-import com.otaliastudios.cameraview.CameraException;
-import com.otaliastudios.cameraview.CameraListener;
-import com.otaliastudios.cameraview.CameraLogger;
-import com.otaliastudios.cameraview.CameraOptions;
-import com.otaliastudios.cameraview.CameraView;
-import com.otaliastudios.cameraview.PictureResult;
-import com.otaliastudios.cameraview.controls.Mode;
-import com.otaliastudios.cameraview.VideoResult;
-import com.otaliastudios.cameraview.controls.Preview;
-import com.otaliastudios.cameraview.filter.Filters;
-import com.otaliastudios.cameraview.filter.MultiFilter;
-import com.otaliastudios.cameraview.filters.BrightnessFilter;
-import com.otaliastudios.cameraview.filters.DuotoneFilter;
-import com.otaliastudios.cameraview.frame.Frame;
-import com.otaliastudios.cameraview.frame.FrameProcessor;
-
-import java.io.ByteArrayOutputStream;
-import java.io.File;
-import java.util.Arrays;
-import java.util.List;
-
-
-public class CameraActivity extends AppCompatActivity implements View.OnClickListener, OptionView.Callback {
-
-    private final static CameraLogger LOG = CameraLogger.create("DemoApp");
-    private final static boolean USE_FRAME_PROCESSOR = true;
-    private final static boolean DECODE_BITMAP = false;
-
-    private CameraView camera;
-    private ViewGroup controlPanel;
-    private long mCaptureTime;
-
-    private int mCurrentFilter = 0;
-    private final Filters[] mAllFilters = Filters.values();
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_camera);
-        CameraLogger.setLogLevel(CameraLogger.LEVEL_VERBOSE);
-
-        camera = findViewById(R.id.camera);
-        camera.setLifecycleOwner(this);
-        camera.addCameraListener(new Listener());
-
-        if (USE_FRAME_PROCESSOR) {
-            camera.addFrameProcessor(new FrameProcessor() {
-                private long lastTime = System.currentTimeMillis();
-
-                @Override
-                public void process(@NonNull Frame frame) {
-                    long newTime = frame.getTime();
-                    long delay = newTime - lastTime;
-                    lastTime = newTime;
-                    LOG.v("Frame delayMillis:", delay, "FPS:", 1000 / delay);
-                    if (DECODE_BITMAP) {
-                        if (frame.getFormat() == ImageFormat.NV21
-                                && frame.getDataClass() == byte[].class) {
-                            byte[] data = frame.getData();
-                            YuvImage yuvImage = new YuvImage(data,
-                                    frame.getFormat(),
-                                    frame.getSize().getWidth(),
-                                    frame.getSize().getHeight(),
-                                    null);
-                            ByteArrayOutputStream jpegStream = new ByteArrayOutputStream();
-                            yuvImage.compressToJpeg(new Rect(0, 0,
-                                    frame.getSize().getWidth(),
-                                    frame.getSize().getHeight()), 100, jpegStream);
-                            byte[] jpegByteArray = jpegStream.toByteArray();
-                            Bitmap bitmap = BitmapFactory.decodeByteArray(jpegByteArray,
-                                    0, jpegByteArray.length);
-                            //noinspection ResultOfMethodCallIgnored
-                            bitmap.toString();
-                        }
-                    }
-                }
-            });
-        }
-
-        findViewById(R.id.edit).setOnClickListener(this);
-        findViewById(R.id.capturePicture).setOnClickListener(this);
-        findViewById(R.id.capturePictureSnapshot).setOnClickListener(this);
-        findViewById(R.id.captureVideo).setOnClickListener(this);
-        findViewById(R.id.captureVideoSnapshot).setOnClickListener(this);
-        findViewById(R.id.toggleCamera).setOnClickListener(this);
-        findViewById(R.id.changeFilter).setOnClickListener(this);
-
-        controlPanel = findViewById(R.id.controls);
-        ViewGroup group = (ViewGroup) controlPanel.getChildAt(0);
-        final View watermark = findViewById(R.id.watermark);
-
-        List<Option<?>> options = Arrays.asList(
-                // Layout
-                new Option.Width(), new Option.Height(),
-                // Engine and preview
-                new Option.Mode(), new Option.Engine(), new Option.Preview(),
-                // Some controls
-                new Option.Flash(), new Option.WhiteBalance(), new Option.Hdr(),
-                new Option.PictureMetering(), new Option.PictureSnapshotMetering(),
-                new Option.PictureFormat(),
-                // Video recording
-                new Option.PreviewFrameRate(), new Option.VideoCodec(), new Option.Audio(),
-                // Gestures
-                new Option.Pinch(), new Option.HorizontalScroll(), new Option.VerticalScroll(),
-                new Option.Tap(), new Option.LongTap(),
-                // Watermarks
-                new Option.OverlayInPreview(watermark),
-                new Option.OverlayInPictureSnapshot(watermark),
-                new Option.OverlayInVideoSnapshot(watermark),
-                // Frame Processing
-                new Option.FrameProcessingFormat(),
-                // Other
-                new Option.Grid(), new Option.GridColor(), new Option.UseDeviceOrientation()
-        );
-        List<Boolean> dividers = Arrays.asList(
-                // Layout
-                false, true,
-                // Engine and preview
-                false, false, true,
-                // Some controls
-                false, false, false, false, false, true,
-                // Video recording
-                false, false, true,
-                // Gestures
-                false, false, false, false, true,
-                // Watermarks
-                false, false, true,
-                // Frame Processing
-                true,
-                // Other
-                false, false, true
-        );
-        for (int i = 0; i < options.size(); i++) {
-            OptionView view = new OptionView(this);
-            //noinspection unchecked
-            view.setOption(options.get(i), this);
-            view.setHasDivider(dividers.get(i));
-            group.addView(view,
-                    ViewGroup.LayoutParams.MATCH_PARENT,
-                    ViewGroup.LayoutParams.WRAP_CONTENT);
-        }
-
-        controlPanel.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
-            @Override
-            public void onGlobalLayout() {
-                BottomSheetBehavior b = BottomSheetBehavior.from(controlPanel);
-                b.setState(BottomSheetBehavior.STATE_HIDDEN);
-            }
-        });
-
-        // Animate the watermark just to show we record the animation in video snapshots
-        ValueAnimator animator = ValueAnimator.ofFloat(1F, 0.8F);
-        animator.setDuration(300);
-        animator.setRepeatCount(ValueAnimator.INFINITE);
-        animator.setRepeatMode(ValueAnimator.REVERSE);
-        animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
-            @Override
-            public void onAnimationUpdate(ValueAnimator animation) {
-                float scale = (float) animation.getAnimatedValue();
-                watermark.setScaleX(scale);
-                watermark.setScaleY(scale);
-                watermark.setRotation(watermark.getRotation() + 2);
-            }
-        });
-        animator.start();
-    }
-
-    private void message(@NonNull String content, boolean important) {
-        if (important) {
-            LOG.w(content);
-            Toast.makeText(this, content, Toast.LENGTH_LONG).show();
-        } else {
-            LOG.i(content);
-            Toast.makeText(this, content, Toast.LENGTH_SHORT).show();
-        }
-    }
-
-    private class Listener extends CameraListener {
-
-        @Override
-        public void onCameraOpened(@NonNull CameraOptions options) {
-            ViewGroup group = (ViewGroup) controlPanel.getChildAt(0);
-            for (int i = 0; i < group.getChildCount(); i++) {
-                OptionView view = (OptionView) group.getChildAt(i);
-                view.onCameraOpened(camera, options);
-            }
-        }
-
-        @Override
-        public void onCameraError(@NonNull CameraException exception) {
-            super.onCameraError(exception);
-            message("Got CameraException #" + exception.getReason(), true);
-        }
-
-        @Override
-        public void onPictureTaken(@NonNull PictureResult result) {
-            super.onPictureTaken(result);
-            if (camera.isTakingVideo()) {
-                message("Captured while taking video. Size=" + result.getSize(), false);
-                return;
-            }
-
-            // This can happen if picture was taken with a gesture.
-            long callbackTime = System.currentTimeMillis();
-            if (mCaptureTime == 0) mCaptureTime = callbackTime - 300;
-            LOG.w("onPictureTaken called! Launching activity. Delay:", callbackTime - mCaptureTime);
-            PicturePreviewActivity.setPictureResult(result);
-            Intent intent = new Intent(CameraActivity.this, PicturePreviewActivity.class);
-            intent.putExtra("delay", callbackTime - mCaptureTime);
-            startActivity(intent);
-            mCaptureTime = 0;
-            LOG.w("onPictureTaken called! Launched activity.");
-        }
-
-        @Override
-        public void onVideoTaken(@NonNull VideoResult result) {
-            super.onVideoTaken(result);
-            LOG.w("onVideoTaken called! Launching activity.");
-            VideoPreviewActivity.setVideoResult(result);
-            Intent intent = new Intent(CameraActivity.this, VideoPreviewActivity.class);
-            startActivity(intent);
-            LOG.w("onVideoTaken called! Launched activity.");
-        }
-
-        @Override
-        public void onVideoRecordingStart() {
-            super.onVideoRecordingStart();
-            LOG.w("onVideoRecordingStart!");
-        }
-
-        @Override
-        public void onVideoRecordingEnd() {
-            super.onVideoRecordingEnd();
-            message("Video taken. Processing...", false);
-            LOG.w("onVideoRecordingEnd!");
-        }
-
-        @Override
-        public void onExposureCorrectionChanged(float newValue, @NonNull float[] bounds, @Nullable PointF[] fingers) {
-            super.onExposureCorrectionChanged(newValue, bounds, fingers);
-            message("Exposure correction:" + newValue, false);
-        }
-
-        @Override
-        public void onZoomChanged(float newValue, @NonNull float[] bounds, @Nullable PointF[] fingers) {
-            super.onZoomChanged(newValue, bounds, fingers);
-            message("Zoom:" + newValue, false);
-        }
-    }
-
-    @Override
-    public void onClick(View view) {
-        switch (view.getId()) {
-            case R.id.edit: edit(); break;
-            case R.id.capturePicture: capturePicture(); break;
-            case R.id.capturePictureSnapshot: capturePictureSnapshot(); break;
-            case R.id.captureVideo: captureVideo(); break;
-            case R.id.captureVideoSnapshot: captureVideoSnapshot(); break;
-            case R.id.toggleCamera: toggleCamera(); break;
-            case R.id.changeFilter: changeCurrentFilter(); break;
-        }
-    }
-
-    @Override
-    public void onBackPressed() {
-        BottomSheetBehavior b = BottomSheetBehavior.from(controlPanel);
-        if (b.getState() != BottomSheetBehavior.STATE_HIDDEN) {
-            b.setState(BottomSheetBehavior.STATE_HIDDEN);
-            return;
-        }
-        super.onBackPressed();
-    }
-
-    private void edit() {
-        BottomSheetBehavior b = BottomSheetBehavior.from(controlPanel);
-        b.setState(BottomSheetBehavior.STATE_COLLAPSED);
-    }
-
-    private void capturePicture() {
-        if (camera.getMode() == Mode.VIDEO) {
-            message("Can't take HQ pictures while in VIDEO mode.", false);
-            return;
-        }
-        if (camera.isTakingPicture()) return;
-        mCaptureTime = System.currentTimeMillis();
-        message("Capturing picture...", false);
-        camera.takePicture();
-    }
-
-    private void capturePictureSnapshot() {
-        if (camera.isTakingPicture()) return;
-        if (camera.getPreview() != Preview.GL_SURFACE) {
-            message("Picture snapshots are only allowed with the GL_SURFACE preview.", true);
-            return;
-        }
-        mCaptureTime = System.currentTimeMillis();
-        message("Capturing picture snapshot...", false);
-        camera.takePictureSnapshot();
-    }
-
-    private void captureVideo() {
-        if (camera.getMode() == Mode.PICTURE) {
-            message("Can't record HQ videos while in PICTURE mode.", false);
-            return;
-        }
-        if (camera.isTakingPicture() || camera.isTakingVideo()) return;
-        message("Recording for 5 seconds...", true);
-        camera.takeVideo(new File(getFilesDir(), "video.mp4"), 5000);
-    }
-
-    private void captureVideoSnapshot() {
-        if (camera.isTakingVideo()) {
-            message("Already taking video.", false);
-            return;
-        }
-        if (camera.getPreview() != Preview.GL_SURFACE) {
-            message("Video snapshots are only allowed with the GL_SURFACE preview.", true);
-            return;
-        }
-        message("Recording snapshot for 5 seconds...", true);
-        camera.takeVideoSnapshot(new File(getFilesDir(), "video.mp4"), 5000);
-    }
-
-    private void toggleCamera() {
-        if (camera.isTakingPicture() || camera.isTakingVideo()) return;
-        switch (camera.toggleFacing()) {
-            case BACK:
-                message("Switched to back camera!", false);
-                break;
-
-            case FRONT:
-                message("Switched to front camera!", false);
-                break;
-        }
-    }
-
-    private void changeCurrentFilter() {
-        if (camera.getPreview() != Preview.GL_SURFACE) {
-            message("Filters are supported only when preview is Preview.GL_SURFACE.", true);
-            return;
-        }
-        if (mCurrentFilter < mAllFilters.length - 1) {
-            mCurrentFilter++;
-        } else {
-            mCurrentFilter = 0;
-        }
-        Filters filter = mAllFilters[mCurrentFilter];
-        message(filter.toString(), false);
-
-        // Normal behavior:
-        camera.setFilter(filter.newInstance());
-
-        // To test MultiFilter:
-        // DuotoneFilter duotone = new DuotoneFilter();
-        // duotone.setFirstColor(Color.RED);
-        // duotone.setSecondColor(Color.GREEN);
-        // camera.setFilter(new MultiFilter(duotone, filter.newInstance()));
-    }
-
-    @Override
-    public <T> boolean onValueChanged(@NonNull Option<T> option, @NonNull T value, @NonNull String name) {
-        if ((option instanceof Option.Width || option instanceof Option.Height)) {
-            Preview preview = camera.getPreview();
-            boolean wrapContent = (Integer) value == ViewGroup.LayoutParams.WRAP_CONTENT;
-            if (preview == Preview.SURFACE && !wrapContent) {
-                message("The SurfaceView preview does not support width or height changes. " +
-                        "The view will act as WRAP_CONTENT by default.", true);
-                return false;
-            }
-        }
-        option.set(camera, value);
-        BottomSheetBehavior b = BottomSheetBehavior.from(controlPanel);
-        b.setState(BottomSheetBehavior.STATE_HIDDEN);
-        message("Changed " + option.getName() + " to " + name, false);
-        return true;
-    }
-
-    //region Permissions
-
-    @Override
-    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
-        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
-        boolean valid = true;
-        for (int grantResult : grantResults) {
-            valid = valid && grantResult == PackageManager.PERMISSION_GRANTED;
-        }
-        if (valid && !camera.isOpened()) {
-            camera.open();
-        }
-    }
-
-    //endregion
-}

demo/src/main/java/com/otaliastudios/cameraview/demo/MessageView.java

@@ -1,46 +0,0 @@
-package com.otaliastudios.cameraview.demo;
-
-
-import android.content.Context;
-import androidx.annotation.Nullable;
-import android.util.AttributeSet;
-import android.view.ViewGroup;
-import android.widget.LinearLayout;
-import android.widget.TextView;
-
-public class MessageView extends LinearLayout {
-
-    private TextView message;
-    private TextView title;
-
-    public MessageView(Context context) {
-        this(context, null);
-    }
-
-    public MessageView(Context context, @Nullable AttributeSet attrs) {
-        this(context, attrs, 0);
-    }
-
-    public MessageView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
-        super(context, attrs, defStyleAttr);
-        setOrientation(VERTICAL);
-        inflate(context, R.layout.option_view, this);
-        ViewGroup content = findViewById(R.id.content);
-        inflate(context, R.layout.spinner_text, content);
-        title = findViewById(R.id.title);
-        message = (TextView) content.getChildAt(0);
-    }
-
-    public void setTitleAndMessage(String title, String message) {
-        setTitle(title);
-        setMessage(message);
-    }
-
-    public void setTitle(String title) {
-        this.title.setText(title);
-    }
-
-    public void setMessage(String message) {
-        this.message.setText(message);
-    }
-}

demo/src/main/java/com/otaliastudios/cameraview/demo/Option.java

@@ -1,599 +0,0 @@
-package com.otaliastudios.cameraview.demo;
-
-import android.graphics.Color;
-import androidx.annotation.NonNull;
-import androidx.core.util.Pair;
-
-import android.graphics.ImageFormat;
-import android.view.View;
-import android.view.ViewGroup;
-
-import com.otaliastudios.cameraview.CameraListener;
-import com.otaliastudios.cameraview.CameraOptions;
-import com.otaliastudios.cameraview.CameraView;
-import com.otaliastudios.cameraview.controls.Control;
-import com.otaliastudios.cameraview.gesture.Gesture;
-import com.otaliastudios.cameraview.gesture.GestureAction;
-import com.otaliastudios.cameraview.overlay.Overlay;
-import com.otaliastudios.cameraview.overlay.OverlayLayout;
-
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.Collection;
-import java.util.List;
-
-/**
- * Controls that we want to display in a ControlView.
- */
-@SuppressWarnings("WeakerAccess")
-public abstract class Option<T> {
-
-    private String name;
-
-    private Option(@NonNull String name) {
-        this.name = name;
-    }
-
-    @SuppressWarnings("WeakerAccess")
-    @NonNull
-    public final String getName() {
-        return name;
-    }
-
-    @NonNull
-    public abstract T get(@NonNull CameraView view);
-
-    @NonNull
-    public abstract Collection<T> getAll(@NonNull CameraView view, @NonNull CameraOptions options);
-
-    public abstract void set(@NonNull CameraView view, @NonNull T value);
-
-    @NonNull
-    public String toString(@NonNull T value) {
-        return String.valueOf(value).replace("_", " ").toLowerCase();
-    }
-
-    public static class Width extends Option<Integer> {
-        public Width() {
-            super("Width");
-        }
-
-        @NonNull
-        @Override
-        public Collection<Integer> getAll(@NonNull CameraView view, @NonNull CameraOptions options) {
-            View root = (View) view.getParent();
-            List<Integer> list = new ArrayList<>();
-            int boundary = root.getWidth();
-            if (boundary == 0) boundary = 1000;
-            int step = boundary / 10;
-            list.add(ViewGroup.LayoutParams.WRAP_CONTENT);
-            list.add(ViewGroup.LayoutParams.MATCH_PARENT);
-            for (int i = step; i < boundary; i += step) {
-                list.add(i);
-            }
-            return list;
-        }
-
-        @NonNull
-        @Override
-        public Integer get(@NonNull CameraView view) {
-            return view.getLayoutParams().width;
-        }
-
-        @Override
-        public void set(@NonNull CameraView view, @NonNull Integer value) {
-            view.getLayoutParams().width = (int) value;
-            view.setLayoutParams(view.getLayoutParams());
-        }
-
-        @NonNull
-        @Override
-        public String toString(@NonNull Integer value) {
-            if (value == ViewGroup.LayoutParams.MATCH_PARENT) return "match parent";
-            if (value == ViewGroup.LayoutParams.WRAP_CONTENT) return "wrap content";
-            return super.toString(value);
-        }
-    }
-
-    public static class Height extends Option<Integer> {
-        public Height() {
-            super("Height");
-        }
-
-        @NonNull
-        @Override
-        public Collection<Integer> getAll(@NonNull CameraView view, @NonNull CameraOptions options) {
-            View root = (View) view.getParent();
-            ArrayList<Integer> list = new ArrayList<>();
-            int boundary = root.getHeight();
-            if (boundary == 0) boundary = 1000;
-            int step = boundary / 10;
-            list.add(ViewGroup.LayoutParams.WRAP_CONTENT);
-            list.add(ViewGroup.LayoutParams.MATCH_PARENT);
-            for (int i = step; i < boundary; i += step) {
-                list.add(i);
-            }
-            return list;
-        }
-
-        @NonNull
-        @Override
-        public Integer get(@NonNull CameraView view) {
-            return view.getLayoutParams().height;
-        }
-
-        @Override
-        public void set(@NonNull CameraView view, @NonNull Integer value) {
-            view.getLayoutParams().height = (int) value;
-            view.setLayoutParams(view.getLayoutParams());
-        }
-
-        @NonNull
-        @Override
-        public String toString(@NonNull Integer value) {
-            if (value == ViewGroup.LayoutParams.MATCH_PARENT) return "match parent";
-            if (value == ViewGroup.LayoutParams.WRAP_CONTENT) return "wrap content";
-            return super.toString(value);
-        }
-    }
-
-    private static abstract class ControlOption<T extends Control> extends Option<T> {
-        private final Class<T> controlClass;
-
-        ControlOption(@NonNull Class<T> controlClass, String name) {
-            super(name);
-            this.controlClass = controlClass;
-        }
-
-        @Override
-        public void set(@NonNull CameraView view, @NonNull T value) {
-            view.set(value);
-        }
-
-        @NonNull
-        @Override
-        public T get(@NonNull CameraView view) {
-            return view.get(controlClass);
-        }
-
-        @NonNull
-        @Override
-        public Collection<T> getAll(@NonNull CameraView view, @NonNull CameraOptions options) {
-            return options.getSupportedControls(controlClass);
-        }
-    }
-
-    public static class Mode extends ControlOption<com.otaliastudios.cameraview.controls.Mode> {
-        public Mode() {
-            super(com.otaliastudios.cameraview.controls.Mode.class, "Mode");
-        }
-    }
-
-    public static class Engine extends ControlOption<com.otaliastudios.cameraview.controls.Engine> {
-        public Engine() {
-            super(com.otaliastudios.cameraview.controls.Engine.class, "Engine");
-        }
-
-        @Override
-        public void set(final @NonNull CameraView view, final @NonNull com.otaliastudios.cameraview.controls.Engine value) {
-            boolean started = view.isOpened();
-            if (started) {
-                view.addCameraListener(new CameraListener() {
-                    @Override
-                    public void onCameraClosed() {
-                        super.onCameraClosed();
-                        view.removeCameraListener(this);
-                        view.setEngine(value);
-                        view.open();
-                    }
-                });
-                view.close();
-            } else {
-                view.setEngine(value);
-            }
-        }
-    }
-
-    public static class Preview extends ControlOption<com.otaliastudios.cameraview.controls.Preview> {
-        public Preview() {
-            super(com.otaliastudios.cameraview.controls.Preview.class, "Preview Surface");
-        }
-
-        @Override
-        public void set(final @NonNull CameraView view, final @NonNull com.otaliastudios.cameraview.controls.Preview value) {
-            boolean opened = view.isOpened();
-            if (opened) {
-                view.addCameraListener(new CameraListener() {
-                    @Override
-                    public void onCameraClosed() {
-                        super.onCameraClosed();
-                        view.removeCameraListener(this);
-                        applyPreview(view, value);
-                        view.open();
-                    }
-                });
-                view.close();
-            } else {
-                applyPreview(view, value);
-            }
-        }
-
-        // This is really tricky since the preview can only be changed when not attached to window.
-        private void applyPreview(@NonNull CameraView cameraView,
-                                  @NonNull com.otaliastudios.cameraview.controls.Preview newPreview) {
-            ViewGroup.LayoutParams params = cameraView.getLayoutParams();
-            ViewGroup parent = (ViewGroup) cameraView.getParent();
-            int index = 0;
-            for (int i = 0; i < parent.getChildCount(); i++) {
-                if (parent.getChildAt(i) == cameraView) {
-                    index = i;
-                    break;
-                }
-            }
-            parent.removeView(cameraView);
-            cameraView.setPreview(newPreview);
-            parent.addView(cameraView, index, params);
-        }
-    }
-
-    public static class Flash extends ControlOption<com.otaliastudios.cameraview.controls.Flash> {
-        public Flash() {
-            super(com.otaliastudios.cameraview.controls.Flash.class, "Flash");
-        }
-    }
-
-    public static class WhiteBalance extends ControlOption<com.otaliastudios.cameraview.controls.WhiteBalance> {
-        public WhiteBalance() {
-            super(com.otaliastudios.cameraview.controls.WhiteBalance.class, "White Balance");
-        }
-    }
-
-    public static class Hdr extends ControlOption<com.otaliastudios.cameraview.controls.Hdr> {
-        public Hdr() {
-            super(com.otaliastudios.cameraview.controls.Hdr.class, "HDR");
-        }
-    }
-
-    public static class PictureMetering extends Option<Boolean> {
-
-        public PictureMetering() {
-            super("Picture Metering");
-        }
-
-        @NonNull
-        @Override
-        public Boolean get(@NonNull CameraView view) {
-            return view.getPictureMetering();
-        }
-
-        @NonNull
-        @Override
-        public Collection<Boolean> getAll(@NonNull CameraView view, @NonNull CameraOptions options) {
-            return Arrays.asList(true, false);
-        }
-
-        @Override
-        public void set(@NonNull CameraView view, @NonNull Boolean value) {
-            view.setPictureMetering(value);
-        }
-    }
-
-    public static class PictureSnapshotMetering extends Option<Boolean> {
-
-        public PictureSnapshotMetering() {
-            super("Picture Snapshot Metering");
-        }
-
-        @NonNull
-        @Override
-        public Boolean get(@NonNull CameraView view) {
-            return view.getPictureSnapshotMetering();
-        }
-
-        @NonNull
-        @Override
-        public Collection<Boolean> getAll(@NonNull CameraView view, @NonNull CameraOptions options) {
-            return Arrays.asList(true, false);
-        }
-
-        @Override
-        public void set(@NonNull CameraView view, @NonNull Boolean value) {
-            view.setPictureSnapshotMetering(value);
-        }
-    }
-
-    public static class VideoCodec extends ControlOption<com.otaliastudios.cameraview.controls.VideoCodec> {
-        public VideoCodec() {
-            super(com.otaliastudios.cameraview.controls.VideoCodec.class, "Video Codec");
-        }
-    }
-
-    public static class Audio extends ControlOption<com.otaliastudios.cameraview.controls.Audio> {
-        public Audio() {
-            super(com.otaliastudios.cameraview.controls.Audio.class, "Audio");
-        }
-    }
-
-    private static abstract class GestureOption extends Option<GestureAction> {
-        private final Gesture gesture;
-        private final GestureAction[] allActions = GestureAction.values();
-
-        GestureOption(@NonNull Gesture gesture, String name) {
-            super(name);
-            this.gesture = gesture;
-        }
-
-        @Override
-        public void set(@NonNull CameraView view, @NonNull GestureAction value) {
-            view.mapGesture(gesture, value);
-        }
-
-        @NonNull
-        @Override
-        public GestureAction get(@NonNull CameraView view) {
-            return view.getGestureAction(gesture);
-        }
-
-        @NonNull
-        @Override
-        public Collection<GestureAction> getAll(@NonNull CameraView view, @NonNull CameraOptions options) {
-            List<GestureAction> list = new ArrayList<>();
-            for (GestureAction action : allActions) {
-                if (gesture.isAssignableTo(action) && options.supports(action)) {
-                    list.add(action);
-                }
-            }
-            return list;
-        }
-    }
-
-    public static class Pinch extends GestureOption {
-        public Pinch() {
-            super(Gesture.PINCH, "Pinch");
-        }
-    }
-
-    public static class HorizontalScroll extends GestureOption {
-        public HorizontalScroll() {
-            super(Gesture.SCROLL_HORIZONTAL, "Horizontal Scroll");
-        }
-    }
-
-    public static class VerticalScroll extends GestureOption {
-        public VerticalScroll() {
-            super(Gesture.SCROLL_VERTICAL, "Vertical Scroll");
-        }
-    }
-
-    public static class Tap extends GestureOption {
-        public Tap() {
-            super(Gesture.TAP, "Tap");
-        }
-    }
-
-    public static class LongTap extends GestureOption {
-        public LongTap() {
-            super(Gesture.LONG_TAP, "Long Tap");
-        }
-    }
-
-    private static abstract class OverlayOption extends Option<Boolean> {
-        private View overlay;
-        private Overlay.Target target;
-
-        OverlayOption(@NonNull Overlay.Target target, @NonNull String name, @NonNull View overlay) {
-            super(name);
-            this.overlay = overlay;
-            this.target = target;
-        }
-
-        @NonNull
-        @Override
-        public Collection<Boolean> getAll(@NonNull CameraView view, @NonNull CameraOptions options) {
-            return Arrays.asList(true, false);
-        }
-
-        @NonNull
-        @Override
-        public Boolean get(@NonNull CameraView view) {
-            OverlayLayout.LayoutParams params = (OverlayLayout.LayoutParams) overlay.getLayoutParams();
-            switch (target) {
-                case PREVIEW: return params.drawOnPreview;
-                case PICTURE_SNAPSHOT: return params.drawOnPictureSnapshot;
-                case VIDEO_SNAPSHOT: return params.drawOnVideoSnapshot;
-            }
-            return false;
-        }
-
-        @Override
-        public void set(@NonNull CameraView view, @NonNull Boolean value) {
-            OverlayLayout.LayoutParams params = (OverlayLayout.LayoutParams) overlay.getLayoutParams();
-            switch (target) {
-                case PREVIEW: params.drawOnPreview = value; break;
-                case PICTURE_SNAPSHOT: params.drawOnPictureSnapshot = value; break;
-                case VIDEO_SNAPSHOT: params.drawOnVideoSnapshot = value; break;
-            }
-            overlay.setLayoutParams(params);
-        }
-    }
-
-    public static class OverlayInPreview extends OverlayOption {
-        public OverlayInPreview(@NonNull View overlay) {
-            super(Overlay.Target.PREVIEW, "Overlay in Preview", overlay);
-        }
-    }
-
-    public static class OverlayInPictureSnapshot extends OverlayOption {
-        public OverlayInPictureSnapshot(@NonNull View overlay) {
-            super(Overlay.Target.PICTURE_SNAPSHOT, "Overlay in Picture Snapshot", overlay);
-        }
-    }
-
-    public static class OverlayInVideoSnapshot extends OverlayOption {
-        public OverlayInVideoSnapshot(@NonNull View overlay) {
-            super(Overlay.Target.VIDEO_SNAPSHOT, "Overlay in Video Snapshot", overlay);
-        }
-    }
-
-    public static class Grid extends ControlOption<com.otaliastudios.cameraview.controls.Grid> {
-        public Grid() {
-            super(com.otaliastudios.cameraview.controls.Grid.class, "Grid Lines");
-        }
-    }
-
-    public static class GridColor extends Option<Pair<Integer, String>> {
-
-        public GridColor() {
-            super("Grid Color");
-        }
-
-        private static final List<Pair<Integer, String>> ALL = Arrays.asList(
-                new Pair<>(Color.argb(160, 255, 255, 255), "default"),
-                new Pair<>(Color.WHITE, "white"),
-                new Pair<>(Color.BLACK, "black"),
-                new Pair<>(Color.YELLOW, "yellow")
-        );
-
-        @NonNull
-        @Override
-        public Collection<Pair<Integer, String>> getAll(@NonNull CameraView view, @NonNull CameraOptions options) {
-            return ALL;
-        }
-
-        @NonNull
-        @Override
-        public Pair<Integer, String> get(@NonNull CameraView view) {
-            for (Pair<Integer, String> pair : ALL) {
-                //noinspection ConstantConditions
-                if (pair.first == view.getGridColor()) {
-                    return pair;
-                }
-            }
-            throw new RuntimeException("Could not find grid color");
-        }
-
-        @Override
-        public void set(@NonNull CameraView view, @NonNull Pair<Integer, String> value) {
-            //noinspection ConstantConditions
-            view.setGridColor(value.first);
-        }
-
-        @NonNull
-        @Override
-        public String toString(@NonNull Pair<Integer, String> value) {
-            //noinspection ConstantConditions
-            return value.second;
-        }
-    }
-
-    public static class UseDeviceOrientation extends Option<Boolean> {
-        public UseDeviceOrientation() {
-            super("Use Device Orientation");
-        }
-
-        @NonNull
-        @Override
-        public Collection<Boolean> getAll(@NonNull CameraView view, @NonNull CameraOptions options) {
-            return Arrays.asList(true, false);
-        }
-
-        @NonNull
-        @Override
-        public Boolean get(@NonNull CameraView view) {
-            return view.getUseDeviceOrientation();
-        }
-
-        @Override
-        public void set(@NonNull CameraView view, @NonNull Boolean value) {
-            view.setUseDeviceOrientation(value);
-        }
-    }
-
-    public static class PreviewFrameRate extends Option<Integer> {
-        public PreviewFrameRate() {
-            super("Preview FPS");
-        }
-
-        @NonNull
-        @Override
-        public Collection<Integer> getAll(@NonNull CameraView view, @NonNull CameraOptions options) {
-            float min = options.getPreviewFrameRateMinValue();
-            float max = options.getPreviewFrameRateMaxValue();
-            float delta = max - min;
-            List<Integer> result = new ArrayList<>();
-            if (min == 0F && max == 0F) {
-                return result; // empty list
-            } else if (delta < 0.005F) {
-                result.add(Math.round(min));
-                return result; // single value
-            } else {
-                final int steps = 3;
-                final float step = delta / steps;
-                for (int i = 0; i <= steps; i++) {
-                    result.add(Math.round(min));
-                    min += step;
-                }
-                return result;
-            }
-        }
-
-        @NonNull
-        @Override
-        public Integer get(@NonNull CameraView view) {
-            return Math.round(view.getPreviewFrameRate());
-        }
-
-        @Override
-        public void set(@NonNull CameraView view, @NonNull Integer value) {
-            view.setPreviewFrameRate((float) value);
-        }
-    }
-
-    public static class PictureFormat extends ControlOption<com.otaliastudios.cameraview.controls.PictureFormat> {
-        public PictureFormat() {
-            super(com.otaliastudios.cameraview.controls.PictureFormat.class, "Picture Format");
-        }
-    }
-
-    public static class FrameProcessingFormat extends Option<Integer> {
-
-        FrameProcessingFormat() {
-            super("Frame Processing Format");
-        }
-
-        @Override
-        public void set(@NonNull CameraView view, @NonNull Integer value) {
-            view.setFrameProcessingFormat(value);
-        }
-
-        @NonNull
-        @Override
-        public Integer get(@NonNull CameraView view) {
-            return view.getFrameProcessingFormat();
-        }
-
-        @NonNull
-        @Override
-        public Collection<Integer> getAll(@NonNull CameraView view, @NonNull CameraOptions options) {
-            return options.getSupportedFrameProcessingFormats();
-        }
-
-        @NonNull
-        @Override
-        public String toString(@NonNull Integer value) {
-            switch (value) {
-                case ImageFormat.NV21: return "NV21";
-                case ImageFormat.NV16: return "NV16";
-                case ImageFormat.JPEG: return "JPEG";
-                case ImageFormat.YUY2: return "YUY2";
-                case ImageFormat.YUV_420_888: return "YUV_420_888";
-                case ImageFormat.YUV_422_888: return "YUV_422_888";
-                case ImageFormat.YUV_444_888: return "YUV_444_888";
-                case ImageFormat.RAW10: return "RAW10";
-                case ImageFormat.RAW12: return "RAW12";
-                case ImageFormat.RAW_SENSOR: return "RAW_SENSOR";
-            }
-            return super.toString(value);
-        }
-    }
-}

demo/src/main/java/com/otaliastudios/cameraview/demo/OptionView.java

@@ -1,97 +0,0 @@
-package com.otaliastudios.cameraview.demo;
-
-
-import android.annotation.SuppressLint;
-import android.content.Context;
-import android.util.Log;
-import android.view.View;
-import android.view.ViewGroup;
-import android.widget.AdapterView;
-import android.widget.ArrayAdapter;
-import android.widget.LinearLayout;
-import android.widget.Spinner;
-import android.widget.TextView;
-
-import androidx.annotation.NonNull;
-
-import com.otaliastudios.cameraview.CameraOptions;
-import com.otaliastudios.cameraview.CameraView;
-
-import java.util.ArrayList;
-
-@SuppressLint("ViewConstructor")
-public class OptionView<Value> extends LinearLayout implements Spinner.OnItemSelectedListener {
-
-    interface Callback {
-        <T> boolean onValueChanged(@NonNull Option<T> option, @NonNull T value, @NonNull String name);
-    }
-
-    private Value value;
-    private ArrayList<Value> values;
-    private ArrayList<String> valuesStrings;
-    private Option option;
-    private Callback callback;
-    private Spinner spinner;
-
-    public OptionView(@NonNull Context context) {
-        super(context);
-        setOrientation(VERTICAL);
-        inflate(context, R.layout.option_view, this);
-        ViewGroup content = findViewById(R.id.content);
-        spinner = new Spinner(context, Spinner.MODE_DROPDOWN);
-        content.addView(spinner);
-    }
-
-    public void setHasDivider(boolean hasDivider) {
-        View divider = findViewById(R.id.divider);
-        divider.setVisibility(hasDivider ? View.VISIBLE : View.GONE);
-    }
-
-    public void setOption(@NonNull Option<Value> option, @NonNull Callback callback) {
-        this.option = option;
-        this.callback = callback;
-        TextView title = findViewById(R.id.title);
-        title.setText(option.getName());
-    }
-
-    @SuppressWarnings("all")
-    public void onCameraOpened(CameraView view, CameraOptions options) {
-        values = new ArrayList(option.getAll(view, options));
-        value = (Value) option.get(view);
-        valuesStrings = new ArrayList<>();
-        for (Value value : values) {
-            valuesStrings.add(option.toString(value));
-        }
-
-        if (values.isEmpty()) {
-            spinner.setOnItemSelectedListener(null);
-            spinner.setEnabled(false);
-            spinner.setAlpha(0.8f);
-            spinner.setAdapter(new ArrayAdapter(getContext(),
-                    R.layout.spinner_text, new String[]{ "Not supported." }));
-            spinner.setSelection(0, false);
-        } else {
-            spinner.setEnabled(true);
-            spinner.setAlpha(1f);
-            spinner.setAdapter(new ArrayAdapter(getContext(),
-                    R.layout.spinner_text, valuesStrings));
-            spinner.setSelection(values.indexOf(value), false);
-            spinner.setOnItemSelectedListener(this);
-        }
-    }
-
-    @Override
-    public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
-        if (!values.get(i).equals(value)) {
-            Log.e("ControlView", "curr: " + value + " new: " + values.get(i));
-            if (!callback.onValueChanged(option, values.get(i), valuesStrings.get(i))) {
-                spinner.setSelection(values.indexOf(value)); // Go back.
-            } else {
-                value = values.get(i);
-            }
-        }
-    }
-
-    @Override
-    public void onNothingSelected(AdapterView<?> adapterView) {}
-}

demo/src/main/java/com/otaliastudios/cameraview/demo/PicturePreviewActivity.java

@@ -1,136 +0,0 @@
-package com.otaliastudios.cameraview.demo;
-
-import android.app.Activity;
-import android.content.Context;
-import android.content.Intent;
-import android.graphics.Bitmap;
-import android.graphics.BitmapFactory;
-import android.graphics.Color;
-import android.graphics.drawable.ColorDrawable;
-import android.net.Uri;
-import android.os.Bundle;
-import androidx.annotation.Nullable;
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.core.content.FileProvider;
-
-import android.util.Log;
-import android.view.Menu;
-import android.view.MenuItem;
-import android.widget.ImageView;
-import android.widget.Toast;
-
-import com.otaliastudios.cameraview.CameraUtils;
-import com.otaliastudios.cameraview.FileCallback;
-import com.otaliastudios.cameraview.size.AspectRatio;
-import com.otaliastudios.cameraview.BitmapCallback;
-import com.otaliastudios.cameraview.PictureResult;
-
-import java.io.File;
-import java.io.FileInputStream;
-import java.io.FileOutputStream;
-
-
-public class PicturePreviewActivity extends AppCompatActivity {
-
-    private static PictureResult picture;
-
-    public static void setPictureResult(@Nullable PictureResult pictureResult) {
-        picture = pictureResult;
-    }
-
-    @Override
-    protected void onCreate(@Nullable Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_picture_preview);
-        final PictureResult result = picture;
-        if (result == null) {
-            finish();
-            return;
-        }
-
-        final ImageView imageView = findViewById(R.id.image);
-        final MessageView captureResolution = findViewById(R.id.nativeCaptureResolution);
-        final MessageView captureLatency = findViewById(R.id.captureLatency);
-        final MessageView exifRotation = findViewById(R.id.exifRotation);
-
-        final long delay = getIntent().getLongExtra("delay", 0);
-        AspectRatio ratio = AspectRatio.of(result.getSize());
-        captureLatency.setTitleAndMessage("Approx. latency", delay + " milliseconds");
-        captureResolution.setTitleAndMessage("Resolution", result.getSize() + " (" + ratio + ")");
-        exifRotation.setTitleAndMessage("EXIF rotation", result.getRotation() + "");
-        try {
-            result.toBitmap(1000, 1000, new BitmapCallback() {
-                @Override
-                public void onBitmapReady(Bitmap bitmap) {
-                    imageView.setImageBitmap(bitmap);
-                }
-            });
-        } catch (UnsupportedOperationException e) {
-            imageView.setImageDrawable(new ColorDrawable(Color.GREEN));
-            Toast.makeText(this, "Can't preview this format: " + picture.getFormat(),
-                    Toast.LENGTH_LONG).show();
-        }
-
-        if (result.isSnapshot()) {
-            // Log the real size for debugging reason.
-            BitmapFactory.Options options = new BitmapFactory.Options();
-            options.inJustDecodeBounds = true;
-            BitmapFactory.decodeByteArray(result.getData(), 0, result.getData().length, options);
-            if (result.getRotation() % 180 != 0) {
-                Log.e("PicturePreview", "The picture full size is " + result.getSize().getHeight() + "x" + result.getSize().getWidth());
-            } else {
-                Log.e("PicturePreview", "The picture full size is " + result.getSize().getWidth() + "x" + result.getSize().getHeight());
-            }
-        }
-    }
-
-    @Override
-    protected void onDestroy() {
-        super.onDestroy();
-        if (!isChangingConfigurations()) {
-            setPictureResult(null);
-        }
-    }
-
-    @Override
-    public boolean onCreateOptionsMenu(Menu menu) {
-        getMenuInflater().inflate(R.menu.share, menu);
-        return true;
-    }
-
-    @Override
-    public boolean onOptionsItemSelected(MenuItem item) {
-        if (item.getItemId() == R.id.share) {
-            Toast.makeText(this, "Sharing...", Toast.LENGTH_SHORT).show();
-            String extension;
-            switch (picture.getFormat()) {
-                case JPEG: extension = "jpg"; break;
-                case DNG: extension = "dng"; break;
-                default: throw new RuntimeException("Unknown format.");
-            }
-            File file = new File(getFilesDir(), "picture." + extension);
-            CameraUtils.writeToFile(picture.getData(), file, new FileCallback() {
-                @Override
-                public void onFileReady(@Nullable File file) {
-                    if (file != null) {
-                        Context context = PicturePreviewActivity.this;
-                        Intent intent = new Intent(Intent.ACTION_SEND);
-                        intent.setType("image/*");
-                        Uri uri = FileProvider.getUriForFile(context,
-                                context.getPackageName() + ".provider",
-                                file);
-                        intent.putExtra(Intent.EXTRA_STREAM, uri);
-                        intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
-                        startActivity(intent);
-                    } else {
-                        Toast.makeText(PicturePreviewActivity.this,
-                                "Error while writing file.",
-                                Toast.LENGTH_SHORT).show();
-                    }
-                }
-            });
-            return true;
-        }
-        return super.onOptionsItemSelected(item);
-    }
-}

demo/src/main/java/com/otaliastudios/cameraview/demo/VideoPreviewActivity.java

@@ -1,134 +0,0 @@
-package com.otaliastudios.cameraview.demo;
-
-import android.app.Activity;
-import android.content.Context;
-import android.content.Intent;
-import android.media.MediaPlayer;
-import android.net.Uri;
-import android.os.Bundle;
-import androidx.annotation.Nullable;
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.core.content.FileProvider;
-
-import android.util.Log;
-import android.view.Menu;
-import android.view.MenuItem;
-import android.view.View;
-import android.view.ViewGroup;
-import android.widget.MediaController;
-import android.widget.Toast;
-import android.widget.VideoView;
-
-import com.otaliastudios.cameraview.CameraUtils;
-import com.otaliastudios.cameraview.FileCallback;
-import com.otaliastudios.cameraview.VideoResult;
-import com.otaliastudios.cameraview.size.AspectRatio;
-
-import java.io.File;
-
-
-public class VideoPreviewActivity extends AppCompatActivity {
-
-    private VideoView videoView;
-
-    private static VideoResult videoResult;
-
-    public static void setVideoResult(@Nullable VideoResult result) {
-        videoResult = result;
-    }
-    @Override
-    protected void onCreate(@Nullable Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_video_preview);
-        final VideoResult result = videoResult;
-        if (result == null) {
-            finish();
-            return;
-        }
-
-        videoView = findViewById(R.id.video);
-        videoView.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View view) {
-                playVideo();
-            }
-        });
-        final MessageView actualResolution = findViewById(R.id.actualResolution);
-        final MessageView isSnapshot = findViewById(R.id.isSnapshot);
-        final MessageView rotation = findViewById(R.id.rotation);
-        final MessageView audio = findViewById(R.id.audio);
-        final MessageView audioBitRate = findViewById(R.id.audioBitRate);
-        final MessageView videoCodec = findViewById(R.id.videoCodec);
-        final MessageView videoBitRate = findViewById(R.id.videoBitRate);
-        final MessageView videoFrameRate = findViewById(R.id.videoFrameRate);
-
-        AspectRatio ratio = AspectRatio.of(result.getSize());
-        actualResolution.setTitleAndMessage("Size", result.getSize() + " (" + ratio + ")");
-        isSnapshot.setTitleAndMessage("Snapshot", result.isSnapshot() + "");
-        rotation.setTitleAndMessage("Rotation", result.getRotation() + "");
-        audio.setTitleAndMessage("Audio", result.getAudio().name());
-        audioBitRate.setTitleAndMessage("Audio bit rate", result.getAudioBitRate() + " bits per sec.");
-        videoCodec.setTitleAndMessage("VideoCodec", result.getVideoCodec().name());
-        videoBitRate.setTitleAndMessage("Video bit rate", result.getVideoBitRate() + " bits per sec.");
-        videoFrameRate.setTitleAndMessage("Video frame rate", result.getVideoFrameRate() + " fps");
-        MediaController controller = new MediaController(this);
-        controller.setAnchorView(videoView);
-        controller.setMediaPlayer(videoView);
-        videoView.setMediaController(controller);
-        videoView.setVideoURI(Uri.fromFile(result.getFile()));
-        videoView.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
-            @Override
-            public void onPrepared(MediaPlayer mp) {
-                ViewGroup.LayoutParams lp = videoView.getLayoutParams();
-                float videoWidth = mp.getVideoWidth();
-                float videoHeight = mp.getVideoHeight();
-                float viewWidth = videoView.getWidth();
-                lp.height = (int) (viewWidth * (videoHeight / videoWidth));
-                videoView.setLayoutParams(lp);
-                playVideo();
-
-                if (result.isSnapshot()) {
-                    // Log the real size for debugging reason.
-                    Log.e("VideoPreview", "The video full size is " + videoWidth + "x" + videoHeight);
-                }
-            }
-        });
-    }
-
-    void playVideo() {
-        if (!videoView.isPlaying()) {
-            videoView.start();
-        }
-    }
-
-    @Override
-    protected void onDestroy() {
-        super.onDestroy();
-        if (!isChangingConfigurations()) {
-            setVideoResult(null);
-        }
-    }
-
-    @Override
-    public boolean onCreateOptionsMenu(Menu menu) {
-        getMenuInflater().inflate(R.menu.share, menu);
-        return true;
-    }
-
-    @Override
-    public boolean onOptionsItemSelected(MenuItem item) {
-        if (item.getItemId() == R.id.share) {
-            Toast.makeText(this, "Sharing...", Toast.LENGTH_SHORT).show();
-            Intent intent = new Intent(Intent.ACTION_SEND);
-            intent.setType("video/*");
-            Uri uri = FileProvider.getUriForFile(this,
-                    this.getPackageName() + ".provider",
-                    videoResult.getFile());
-            intent.putExtra(Intent.EXTRA_STREAM, uri);
-            intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
-            startActivity(intent);
-            return true;
-        }
-        return super.onOptionsItemSelected(item);
-    }
-}

demo/src/main/kotlin/com/otaliastudios/cameraview/demo/CameraActivity.kt

@@ -0,0 +1,344 @@
+package com.otaliastudios.cameraview.demo
+
+import android.animation.ValueAnimator
+import android.content.Intent
+import android.content.pm.PackageManager
+import android.content.pm.PackageManager.PERMISSION_GRANTED
+import android.graphics.*
+import android.os.Bundle
+import android.view.View
+import android.view.ViewGroup
+import android.view.ViewGroup.LayoutParams.MATCH_PARENT
+import android.view.ViewGroup.LayoutParams.WRAP_CONTENT
+import android.widget.Toast
+import androidx.appcompat.app.AppCompatActivity
+import com.google.android.material.bottomsheet.BottomSheetBehavior
+import com.otaliastudios.cameraview.*
+import com.otaliastudios.cameraview.controls.Facing
+import com.otaliastudios.cameraview.controls.Mode
+import com.otaliastudios.cameraview.controls.Preview
+import com.otaliastudios.cameraview.filter.Filters
+import com.otaliastudios.cameraview.frame.Frame
+import com.otaliastudios.cameraview.frame.FrameProcessor
+import java.io.ByteArrayOutputStream
+import java.io.File
+import java.util.*
+
+class CameraActivity : AppCompatActivity(), View.OnClickListener, OptionView.Callback {
+
+    companion object {
+        private val LOG = CameraLogger.create("DemoApp")
+        private const val USE_FRAME_PROCESSOR = false
+        private const val DECODE_BITMAP = false
+    }
+
+    private val camera: CameraView by lazy { findViewById(R.id.camera) }
+    private val controlPanel: ViewGroup by lazy { findViewById(R.id.controls) }
+    private var captureTime: Long = 0
+
+    private var currentFilter = 0
+    private val allFilters = Filters.values()
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_camera)
+        CameraLogger.setLogLevel(CameraLogger.LEVEL_VERBOSE)
+        camera.setLifecycleOwner(this)
+        camera.addCameraListener(Listener())
+        if (USE_FRAME_PROCESSOR) {
+            camera.addFrameProcessor(object : FrameProcessor {
+                private var lastTime = System.currentTimeMillis()
+                override fun process(frame: Frame) {
+                    val newTime = frame.time
+                    val delay = newTime - lastTime
+                    lastTime = newTime
+                    LOG.v("Frame delayMillis:", delay, "FPS:", 1000 / delay)
+                    if (DECODE_BITMAP) {
+                        if (frame.format == ImageFormat.NV21
+                                && frame.dataClass == ByteArray::class.java) {
+                            val data = frame.getData<ByteArray>()
+                            val yuvImage = YuvImage(data,
+                                    frame.format,
+                                    frame.size.width,
+                                    frame.size.height,
+                                    null)
+                            val jpegStream = ByteArrayOutputStream()
+                            yuvImage.compressToJpeg(Rect(0, 0,
+                                    frame.size.width,
+                                    frame.size.height), 100, jpegStream)
+                            val jpegByteArray = jpegStream.toByteArray()
+                            val bitmap = BitmapFactory.decodeByteArray(jpegByteArray,
+                                    0, jpegByteArray.size)
+                            bitmap.toString()
+                        }
+                    }
+                }
+            })
+        }
+        findViewById<View>(R.id.edit).setOnClickListener(this)
+        findViewById<View>(R.id.capturePicture).setOnClickListener(this)
+        findViewById<View>(R.id.capturePictureSnapshot).setOnClickListener(this)
+        findViewById<View>(R.id.captureVideo).setOnClickListener(this)
+        findViewById<View>(R.id.captureVideoSnapshot).setOnClickListener(this)
+        findViewById<View>(R.id.toggleCamera).setOnClickListener(this)
+        findViewById<View>(R.id.changeFilter).setOnClickListener(this)
+        val group = controlPanel.getChildAt(0) as ViewGroup
+        val watermark = findViewById<View>(R.id.watermark)
+        val options: List<Option<*>> = listOf(
+                // Layout
+                Option.Width(), Option.Height(),
+                // Engine and preview
+                Option.Mode(), Option.Engine(), Option.Preview(),
+                // Some controls
+                Option.Flash(), Option.WhiteBalance(), Option.Hdr(),
+                Option.PictureMetering(), Option.PictureSnapshotMetering(),
+                Option.PictureFormat(),
+                // Video recording
+                Option.PreviewFrameRate(), Option.VideoCodec(), Option.Audio(), Option.AudioCodec(),
+                // Gestures
+                Option.Pinch(), Option.HorizontalScroll(), Option.VerticalScroll(),
+                Option.Tap(), Option.LongTap(),
+                // Watermarks
+                Option.OverlayInPreview(watermark),
+                Option.OverlayInPictureSnapshot(watermark),
+                Option.OverlayInVideoSnapshot(watermark),
+                // Frame Processing
+                Option.FrameProcessingFormat(),
+                // Other
+                Option.Grid(), Option.GridColor(), Option.UseDeviceOrientation()
+        )
+        val dividers = listOf(
+                // Layout
+                false, true,
+                // Engine and preview
+                false, false, true,
+                // Some controls
+                false, false, false, false, false, true,
+                // Video recording
+                false, false, false, true,
+                // Gestures
+                false, false, false, false, true,
+                // Watermarks
+                false, false, true,
+                // Frame Processing
+                true,
+                // Other
+                false, false, true
+        )
+        for (i in options.indices) {
+            val view = OptionView<Any>(this)
+            view.setOption(options[i] as Option<Any>, this)
+            view.setHasDivider(dividers[i])
+            group.addView(view, MATCH_PARENT, WRAP_CONTENT)
+        }
+        controlPanel.viewTreeObserver.addOnGlobalLayoutListener {
+            BottomSheetBehavior.from(controlPanel).state = BottomSheetBehavior.STATE_HIDDEN
+        }
+
+        // Animate the watermark just to show we record the animation in video snapshots
+        val animator = ValueAnimator.ofFloat(1f, 0.8f)
+        animator.duration = 300
+        animator.repeatCount = ValueAnimator.INFINITE
+        animator.repeatMode = ValueAnimator.REVERSE
+        animator.addUpdateListener { animation ->
+            val scale = animation.animatedValue as Float
+            watermark.scaleX = scale
+            watermark.scaleY = scale
+            watermark.rotation = watermark.rotation + 2
+        }
+        animator.start()
+    }
+
+    private fun message(content: String, important: Boolean) {
+        if (important) {
+            LOG.w(content)
+            Toast.makeText(this, content, Toast.LENGTH_LONG).show()
+        } else {
+            LOG.i(content)
+            Toast.makeText(this, content, Toast.LENGTH_SHORT).show()
+        }
+    }
+
+    private inner class Listener : CameraListener() {
+        override fun onCameraOpened(options: CameraOptions) {
+            val group = controlPanel.getChildAt(0) as ViewGroup
+            for (i in 0 until group.childCount) {
+                val view = group.getChildAt(i) as OptionView<*>
+                view.onCameraOpened(camera, options)
+            }
+        }
+
+        override fun onCameraError(exception: CameraException) {
+            super.onCameraError(exception)
+            message("Got CameraException #" + exception.reason, true)
+        }
+
+        override fun onPictureTaken(result: PictureResult) {
+            super.onPictureTaken(result)
+            if (camera.isTakingVideo) {
+                message("Captured while taking video. Size=" + result.size, false)
+                return
+            }
+
+            // This can happen if picture was taken with a gesture.
+            val callbackTime = System.currentTimeMillis()
+            if (captureTime == 0L) captureTime = callbackTime - 300
+            LOG.w("onPictureTaken called! Launching activity. Delay:", callbackTime - captureTime)
+            PicturePreviewActivity.pictureResult = result
+            val intent = Intent(this@CameraActivity, PicturePreviewActivity::class.java)
+            intent.putExtra("delay", callbackTime - captureTime)
+            startActivity(intent)
+            captureTime = 0
+            LOG.w("onPictureTaken called! Launched activity.")
+        }
+
+        override fun onVideoTaken(result: VideoResult) {
+            super.onVideoTaken(result)
+            LOG.w("onVideoTaken called! Launching activity.")
+            VideoPreviewActivity.videoResult = result
+            val intent = Intent(this@CameraActivity, VideoPreviewActivity::class.java)
+            startActivity(intent)
+            LOG.w("onVideoTaken called! Launched activity.")
+        }
+
+        override fun onVideoRecordingStart() {
+            super.onVideoRecordingStart()
+            LOG.w("onVideoRecordingStart!")
+        }
+
+        override fun onVideoRecordingEnd() {
+            super.onVideoRecordingEnd()
+            message("Video taken. Processing...", false)
+            LOG.w("onVideoRecordingEnd!")
+        }
+
+        override fun onExposureCorrectionChanged(newValue: Float, bounds: FloatArray, fingers: Array<PointF>?) {
+            super.onExposureCorrectionChanged(newValue, bounds, fingers)
+            message("Exposure correction:$newValue", false)
+        }
+
+        override fun onZoomChanged(newValue: Float, bounds: FloatArray, fingers: Array<PointF>?) {
+            super.onZoomChanged(newValue, bounds, fingers)
+            message("Zoom:$newValue", false)
+        }
+    }
+
+    override fun onClick(view: View) {
+        when (view.id) {
+            R.id.edit -> edit()
+            R.id.capturePicture -> capturePicture()
+            R.id.capturePictureSnapshot -> capturePictureSnapshot()
+            R.id.captureVideo -> captureVideo()
+            R.id.captureVideoSnapshot -> captureVideoSnapshot()
+            R.id.toggleCamera -> toggleCamera()
+            R.id.changeFilter -> changeCurrentFilter()
+        }
+    }
+
+    override fun onBackPressed() {
+        val b = BottomSheetBehavior.from(controlPanel)
+        if (b.state != BottomSheetBehavior.STATE_HIDDEN) {
+            b.state = BottomSheetBehavior.STATE_HIDDEN
+            return
+        }
+        super.onBackPressed()
+    }
+
+    private fun edit() {
+        BottomSheetBehavior.from(controlPanel).state = BottomSheetBehavior.STATE_COLLAPSED
+    }
+
+    private fun capturePicture() {
+        if (camera.mode == Mode.VIDEO) return run {
+            message("Can't take HQ pictures while in VIDEO mode.", false)
+        }
+        if (camera.isTakingPicture) return
+        captureTime = System.currentTimeMillis()
+        message("Capturing picture...", false)
+        camera.takePicture()
+    }
+
+    private fun capturePictureSnapshot() {
+        if (camera.isTakingPicture) return
+        if (camera.preview != Preview.GL_SURFACE) return run {
+            message("Picture snapshots are only allowed with the GL_SURFACE preview.", true)
+        }
+        captureTime = System.currentTimeMillis()
+        message("Capturing picture snapshot...", false)
+        camera.takePictureSnapshot()
+    }
+
+    private fun captureVideo() {
+        if (camera.mode == Mode.PICTURE) return run {
+            message("Can't record HQ videos while in PICTURE mode.", false)
+        }
+        if (camera.isTakingPicture || camera.isTakingVideo) return
+        message("Recording for 5 seconds...", true)
+        camera.takeVideo(File(filesDir, "video.mp4"), 5000)
+    }
+
+    private fun captureVideoSnapshot() {
+        if (camera.isTakingVideo) return run {
+            message("Already taking video.", false)
+        }
+        if (camera.preview != Preview.GL_SURFACE) return run {
+            message("Video snapshots are only allowed with the GL_SURFACE preview.", true)
+        }
+        message("Recording snapshot for 5 seconds...", true)
+        camera.takeVideoSnapshot(File(filesDir, "video.mp4"), 5000)
+    }
+
+    private fun toggleCamera() {
+        if (camera.isTakingPicture || camera.isTakingVideo) return
+        when (camera.toggleFacing()) {
+            Facing.BACK -> message("Switched to back camera!", false)
+            Facing.FRONT -> message("Switched to front camera!", false)
+        }
+    }
+
+    private fun changeCurrentFilter() {
+        if (camera.preview != Preview.GL_SURFACE) return run {
+            message("Filters are supported only when preview is Preview.GL_SURFACE.", true)
+        }
+        if (currentFilter < allFilters.size - 1) {
+            currentFilter++
+        } else {
+            currentFilter = 0
+        }
+        val filter = allFilters[currentFilter]
+        message(filter.toString(), false)
+
+        // Normal behavior:
+        camera.filter = filter.newInstance()
+
+        // To test MultiFilter:
+        // DuotoneFilter duotone = new DuotoneFilter();
+        // duotone.setFirstColor(Color.RED);
+        // duotone.setSecondColor(Color.GREEN);
+        // camera.setFilter(new MultiFilter(duotone, filter.newInstance()));
+    }
+
+    override fun <T : Any> onValueChanged(option: Option<T>, value: T, name: String): Boolean {
+        if (option is Option.Width || option is Option.Height) {
+            val preview = camera.preview
+            val wrapContent = value as Int == WRAP_CONTENT
+            if (preview == Preview.SURFACE && !wrapContent) {
+                message("The SurfaceView preview does not support width or height changes. " +
+                        "The view will act as WRAP_CONTENT by default.", true)
+                return false
+            }
+        }
+        option.set(camera, value)
+        BottomSheetBehavior.from(controlPanel).state = BottomSheetBehavior.STATE_HIDDEN
+        message("Changed " + option.name + " to " + name, false)
+        return true
+    }
+
+    override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<String?>, grantResults: IntArray) {
+        super.onRequestPermissionsResult(requestCode, permissions, grantResults)
+        val valid = grantResults.all { it == PERMISSION_GRANTED }
+        if (valid && !camera.isOpened) {
+            camera.open()
+        }
+    }
+}

demo/src/main/kotlin/com/otaliastudios/cameraview/demo/MessageView.kt

@@ -0,0 +1,34 @@
+package com.otaliastudios.cameraview.demo
+
+import android.content.Context
+import android.util.AttributeSet
+import android.view.View
+import android.view.ViewGroup
+import android.widget.LinearLayout
+import android.widget.TextView
+
+class MessageView @JvmOverloads constructor(
+        context: Context,
+        attrs: AttributeSet? = null,
+        defStyleAttr: Int = 0
+) : LinearLayout(context, attrs, defStyleAttr) {
+
+    init {
+        orientation = VERTICAL
+        View.inflate(context, R.layout.option_view, this)
+        val content = findViewById<ViewGroup>(R.id.content)
+        View.inflate(context, R.layout.spinner_text, content)
+    }
+
+    private val message: TextView = findViewById<ViewGroup>(R.id.content).getChildAt(0) as TextView
+    private val title: TextView = findViewById(R.id.title)
+
+    fun setMessage(message: String) { this.message.text = message }
+
+    fun setTitle(title: String) { this.title.text = title }
+
+    fun setTitleAndMessage(title: String, message: String) {
+        setTitle(title)
+        setMessage(message)
+    }
+}

demo/src/main/kotlin/com/otaliastudios/cameraview/demo/Option.kt

@@ -0,0 +1,296 @@
+package com.otaliastudios.cameraview.demo
+
+import android.graphics.Color
+import android.graphics.ImageFormat
+import android.view.View
+import android.view.ViewGroup
+import android.view.ViewGroup.LayoutParams.WRAP_CONTENT
+import android.view.ViewGroup.LayoutParams.MATCH_PARENT
+
+import com.otaliastudios.cameraview.CameraListener
+import com.otaliastudios.cameraview.CameraOptions
+import com.otaliastudios.cameraview.CameraView
+import com.otaliastudios.cameraview.gesture.GestureAction
+import com.otaliastudios.cameraview.overlay.OverlayLayout
+import kotlin.math.roundToInt
+import kotlin.reflect.KClass
+
+/**
+ * Controls that we want to display in a ControlView.
+ */
+abstract class Option<T: Any>(val name: String) {
+
+    abstract fun get(view: CameraView): T
+
+    abstract fun getAll(view: CameraView, options: CameraOptions): Collection<T>
+
+    abstract fun set(view: CameraView, value: T)
+
+    open fun toString(value: T): String {
+        return "$value".replace("_", "_").toLowerCase()
+    }
+
+    class Width : Option<Int>("Width") {
+        override fun get(view: CameraView) = view.layoutParams.width
+
+        override fun set(view: CameraView, value: Int) {
+            view.layoutParams.width = value
+            view.layoutParams = view.layoutParams
+        }
+
+        override fun getAll(view: CameraView, options: CameraOptions): Collection<Int> {
+            val root = view.parent as View
+            val boundary = root.width.takeIf { it > 0 } ?: 1000
+            val step = boundary / 10
+            val list = mutableListOf(WRAP_CONTENT, MATCH_PARENT)
+            for (i in step until boundary step step) { list.add(i) }
+            return list
+        }
+
+        override fun toString(value: Int): String {
+            if (value == MATCH_PARENT) return "match parent"
+            if (value == WRAP_CONTENT) return "wrap content"
+            return super.toString(value)
+        }
+    }
+
+    class Height : Option<Int>("Height") {
+        override fun get(view: CameraView) = view.layoutParams.height
+
+        override fun set(view: CameraView, value: Int) {
+            view.layoutParams.height = value
+            view.layoutParams = view.layoutParams
+        }
+
+        override fun getAll(view: CameraView, options: CameraOptions): Collection<Int> {
+            val root = view.parent as View
+            val boundary = root.height.takeIf { it > 0 } ?: 1000
+            val step = boundary / 10
+            val list = mutableListOf(WRAP_CONTENT, MATCH_PARENT)
+            for (i in step until boundary step step) { list.add(i) }
+            return list
+        }
+
+        override fun toString(value: Int): String {
+            if (value == MATCH_PARENT) return "match parent"
+            if (value == WRAP_CONTENT) return "wrap content"
+            return super.toString(value)
+        }
+    }
+
+    abstract class Control<T: com.otaliastudios.cameraview.controls.Control>(private val kclass: KClass<T>, name: String) : Option<T>(name) {
+        override fun set(view: CameraView, value: T) = view.set(value)
+        override fun get(view: CameraView) = view.get(kclass.java)
+        override fun getAll(view: CameraView, options: CameraOptions)
+                = options.getSupportedControls(kclass.java)
+    }
+
+    class Mode : Control<com.otaliastudios.cameraview.controls.Mode>(com.otaliastudios.cameraview.controls.Mode::class, "Mode")
+
+    class Engine : Control<com.otaliastudios.cameraview.controls.Engine>(com.otaliastudios.cameraview.controls.Engine::class, "Engine") {
+        override fun set(view: CameraView, value: com.otaliastudios.cameraview.controls.Engine) {
+            if (view.isOpened) {
+                view.addCameraListener(object : CameraListener() {
+                    override fun onCameraClosed() {
+                        super.onCameraClosed()
+                        view.removeCameraListener(this)
+                        view.engine = value
+                        view.open()
+                    }
+                })
+                view.close()
+            } else {
+                view.engine = value
+            }
+        }
+    }
+
+    class Preview : Control<com.otaliastudios.cameraview.controls.Preview>(com.otaliastudios.cameraview.controls.Preview::class, "Preview Surface") {
+        override fun set(view: CameraView, value: com.otaliastudios.cameraview.controls.Preview) {
+            if (view.isOpened) {
+                view.addCameraListener(object : CameraListener() {
+                    override fun onCameraClosed() {
+                        super.onCameraClosed()
+                        view.removeCameraListener(this)
+                        applyPreview(view, value)
+                        view.open()
+                    }
+                })
+                view.close()
+            } else {
+                applyPreview(view, value)
+            }
+        }
+
+        // This is really tricky since the preview can only be changed when not attached to window.
+        private fun applyPreview(view: CameraView, value: com.otaliastudios.cameraview.controls.Preview) {
+            val params = view.layoutParams
+            val parent = view.parent as ViewGroup
+            val index = (0 until parent.childCount).first { parent.getChildAt(it) === view }
+            parent.removeView(view)
+            view.preview = value
+            parent.addView(view, index, params)
+        }
+    }
+
+    class Flash : Control<com.otaliastudios.cameraview.controls.Flash>(com.otaliastudios.cameraview.controls.Flash::class, "Flash")
+
+    class WhiteBalance : Control<com.otaliastudios.cameraview.controls.WhiteBalance>(com.otaliastudios.cameraview.controls.WhiteBalance::class, "White Balance")
+
+    class Hdr : Control<com.otaliastudios.cameraview.controls.Hdr>(com.otaliastudios.cameraview.controls.Hdr::class, "HDR")
+
+    class PictureMetering : Option<Boolean>("Picture Metering") {
+        override fun get(view: CameraView) = view.pictureMetering
+        override fun getAll(view: CameraView, options: CameraOptions) = listOf(true, false)
+        override fun set(view: CameraView, value: Boolean) { view.pictureMetering = value }
+    }
+
+    class PictureSnapshotMetering : Option<Boolean>("Picture Snapshot Metering") {
+        override fun get(view: CameraView) = view.pictureSnapshotMetering
+        override fun getAll(view: CameraView, options: CameraOptions) = listOf(true, false)
+        override fun set(view: CameraView, value: Boolean) { view.pictureSnapshotMetering = value }
+    }
+
+    class VideoCodec : Control<com.otaliastudios.cameraview.controls.VideoCodec>(com.otaliastudios.cameraview.controls.VideoCodec::class, "Video Codec")
+
+    class AudioCodec : Control<com.otaliastudios.cameraview.controls.AudioCodec>(com.otaliastudios.cameraview.controls.AudioCodec::class, "Audio Codec")
+
+    class Audio : Control<com.otaliastudios.cameraview.controls.Audio>(com.otaliastudios.cameraview.controls.Audio::class, "Audio")
+
+    abstract class Gesture(val gesture: com.otaliastudios.cameraview.gesture.Gesture, name: String) : Option<GestureAction>(name) {
+        override fun set(view: CameraView, value: GestureAction) {
+            view.mapGesture(gesture, value)
+        }
+
+        override fun get(view: CameraView): GestureAction {
+            return view.getGestureAction(gesture)
+        }
+
+        override fun getAll(view: CameraView, options: CameraOptions): Collection<GestureAction> {
+            return GestureAction.values().filter {
+                gesture.isAssignableTo(it) && options.supports(it)
+            }
+        }
+    }
+
+    class Pinch : Gesture(com.otaliastudios.cameraview.gesture.Gesture.PINCH, "Pinch")
+
+    class HorizontalScroll : Gesture(com.otaliastudios.cameraview.gesture.Gesture.SCROLL_HORIZONTAL, "Horizontal Scroll")
+
+    class VerticalScroll : Gesture(com.otaliastudios.cameraview.gesture.Gesture.SCROLL_VERTICAL, "Vertical Scroll")
+
+    class Tap : Gesture(com.otaliastudios.cameraview.gesture.Gesture.TAP, "Tap")
+
+    class LongTap : Gesture(com.otaliastudios.cameraview.gesture.Gesture.LONG_TAP, "Long Tap")
+
+    abstract class Overlay(private val overlay: View, private val target: com.otaliastudios.cameraview.overlay.Overlay.Target, name: String) : Option<Boolean>(name) {
+        override fun getAll(view: CameraView, options: CameraOptions) = listOf(true, false)
+        override fun get(view: CameraView): Boolean {
+            val params = overlay.layoutParams as OverlayLayout.LayoutParams
+            return when (target) {
+                com.otaliastudios.cameraview.overlay.Overlay.Target.PREVIEW -> params.drawOnPreview
+                com.otaliastudios.cameraview.overlay.Overlay.Target.PICTURE_SNAPSHOT -> params.drawOnPictureSnapshot
+                com.otaliastudios.cameraview.overlay.Overlay.Target.VIDEO_SNAPSHOT -> params.drawOnVideoSnapshot
+            }
+        }
+
+        override fun set(view: CameraView, value: Boolean) {
+            val params = overlay.layoutParams as OverlayLayout.LayoutParams
+            when (target) {
+                com.otaliastudios.cameraview.overlay.Overlay.Target.PREVIEW -> params.drawOnPreview = value
+                com.otaliastudios.cameraview.overlay.Overlay.Target.PICTURE_SNAPSHOT -> params.drawOnPictureSnapshot = value
+                com.otaliastudios.cameraview.overlay.Overlay.Target.VIDEO_SNAPSHOT -> params.drawOnVideoSnapshot = value
+            }
+            overlay.layoutParams = params
+        }
+    }
+
+    class OverlayInPreview(overlay: View) : Overlay(overlay, com.otaliastudios.cameraview.overlay.Overlay.Target.PREVIEW, "Overlay in Preview")
+
+    class OverlayInPictureSnapshot(overlay: View) : Overlay(overlay, com.otaliastudios.cameraview.overlay.Overlay.Target.PICTURE_SNAPSHOT, "Overlay in Picture Snapshot")
+
+    class OverlayInVideoSnapshot(overlay: View) : Overlay(overlay, com.otaliastudios.cameraview.overlay.Overlay.Target.VIDEO_SNAPSHOT, "Overlay in Video Snapshot")
+
+    class Grid : Control<com.otaliastudios.cameraview.controls.Grid>(com.otaliastudios.cameraview.controls.Grid::class, "Grid Lines")
+
+    class GridColor : Option<Pair<Int, String>>("Grid Color") {
+        private val all = listOf(
+                Color.argb(160, 255, 255, 255) to "default",
+                Color.WHITE to "white",
+                Color.BLACK to "black",
+                Color.YELLOW to "yellow"
+        )
+
+        override fun getAll(view: CameraView, options: CameraOptions) = all
+
+        override fun get(view: CameraView) = all.first { it.first == view.gridColor }
+
+        override fun set(view: CameraView, value: Pair<Int, String>) {
+            view.gridColor = value.first
+        }
+    }
+
+    class UseDeviceOrientation : Option<Boolean>("Use Device Orientation") {
+        override fun getAll(view: CameraView, options: CameraOptions) = listOf(true, false)
+        override fun get(view: CameraView) = view.useDeviceOrientation
+        override fun set(view: CameraView, value: Boolean) {
+            view.useDeviceOrientation = value
+        }
+    }
+
+    class PreviewFrameRate : Option<Int>("Preview FPS") {
+        override fun get(view: CameraView) = view.previewFrameRate.roundToInt()
+
+        override fun set(view: CameraView, value: Int) {
+            view.previewFrameRate = value.toFloat()
+        }
+
+        override fun getAll(view: CameraView, options: CameraOptions): Collection<Int> {
+            val min = options.previewFrameRateMinValue
+            val max = options.previewFrameRateMaxValue
+            val delta = max - min
+            return when {
+                min == 0F && max == 0F -> listOf()
+                delta < 0.005F -> listOf(min.roundToInt())
+                else -> {
+                    val results = mutableListOf<Int>()
+                    var value = min
+                    for (i in 0 until 3) {
+                        results.add(value.roundToInt())
+                        value += delta / 3
+                    }
+                    results
+                }
+            }
+        }
+    }
+
+    class PictureFormat : Control<com.otaliastudios.cameraview.controls.PictureFormat>(com.otaliastudios.cameraview.controls.PictureFormat::class, "Picture Format")
+
+    class FrameProcessingFormat : Option<Int>("Frame Processing Format") {
+        override fun set(view: CameraView, value: Int) {
+            view.frameProcessingFormat = value
+        }
+
+        override fun get(view: CameraView) = view.frameProcessingFormat
+
+        override fun getAll(view: CameraView, options: CameraOptions)
+                = options.supportedFrameProcessingFormats
+
+        override fun toString(value: Int): String {
+            return when (value) {
+                ImageFormat.NV21 -> "NV21"
+                ImageFormat.NV16 -> "NV16"
+                ImageFormat.JPEG -> "JPEG"
+                ImageFormat.YUY2 -> "YUY2"
+                ImageFormat.YUV_420_888 -> "YUV_420_888"
+                ImageFormat.YUV_422_888 -> "YUV_422_888"
+                ImageFormat.YUV_444_888 -> "YUV_444_888"
+                ImageFormat.RAW10 -> "RAW10"
+                ImageFormat.RAW12 -> "RAW12"
+                ImageFormat.RAW_SENSOR -> "RAW_SENSOR"
+                else -> super.toString(value)
+            }
+        }
+    }
+}

demo/src/main/kotlin/com/otaliastudios/cameraview/demo/OptionView.kt

@@ -0,0 +1,76 @@
+package com.otaliastudios.cameraview.demo
+
+import android.content.Context
+import android.util.Log
+import android.view.View
+import android.view.ViewGroup
+import android.widget.*
+import com.otaliastudios.cameraview.CameraOptions
+import com.otaliastudios.cameraview.CameraView
+
+class OptionView<Value: Any>(context: Context) : LinearLayout(context), AdapterView.OnItemSelectedListener {
+
+    interface Callback {
+        fun <T: Any> onValueChanged(option: Option<T>, value: T, name: String): Boolean
+    }
+
+    private lateinit var option: Option<Value>
+    private lateinit var callback: Callback
+    private lateinit var value: Value
+    private lateinit var values: List<Value>
+    private lateinit var valuesStrings: List<String>
+
+    init {
+        orientation = VERTICAL
+        View.inflate(context, R.layout.option_view, this)
+    }
+
+    val spinner = Spinner(context, Spinner.MODE_DROPDOWN).also {
+        val content = findViewById<ViewGroup>(R.id.content)
+        content.addView(it)
+    }
+
+    fun setHasDivider(hasDivider: Boolean) {
+        val divider = findViewById<View>(R.id.divider)
+        divider.visibility = if (hasDivider) View.VISIBLE else View.GONE
+    }
+
+    fun setOption(option: Option<Value>, callback: Callback) {
+        this.option = option
+        this.callback = callback
+        val title = findViewById<TextView>(R.id.title)
+        title.text = option.name
+    }
+
+    fun onCameraOpened(view: CameraView, options: CameraOptions) {
+        values = option.getAll(view, options).toList()
+        value = option.get(view)
+        valuesStrings = values.map { option.toString(it) }
+        if (values.isEmpty()) {
+            spinner.onItemSelectedListener = null
+            spinner.isEnabled = false
+            spinner.alpha = 0.8f
+            spinner.adapter = ArrayAdapter(context, R.layout.spinner_text, arrayOf("Not supported."))
+            spinner.setSelection(0, false)
+        } else {
+            spinner.isEnabled = true
+            spinner.alpha = 1f
+            spinner.adapter = ArrayAdapter(context, R.layout.spinner_text, valuesStrings)
+            spinner.setSelection(values.indexOf(value), false)
+            spinner.onItemSelectedListener = this
+        }
+    }
+
+    override fun onItemSelected(adapterView: AdapterView<*>?, view: View?, i: Int, l: Long) {
+        if (values[i] != value) {
+            Log.e("ControlView", "curr: " + value + " new: " + values[i])
+            if (!callback.onValueChanged(option, values[i], valuesStrings[i])) {
+                spinner.setSelection(values.indexOf(value)) // Go back.
+            } else {
+                value = values[i]
+            }
+        }
+    }
+
+    override fun onNothingSelected(adapterView: AdapterView<*>?) {}
+}

demo/src/main/kotlin/com/otaliastudios/cameraview/demo/PicturePreviewActivity.kt

@@ -0,0 +1,105 @@
+package com.otaliastudios.cameraview.demo
+
+import android.content.Intent
+import android.graphics.BitmapFactory
+import android.graphics.Color
+import android.graphics.drawable.ColorDrawable
+import android.os.Bundle
+import android.util.Log
+import android.view.Menu
+import android.view.MenuItem
+import android.widget.ImageView
+import android.widget.Toast
+import androidx.appcompat.app.AppCompatActivity
+import androidx.core.content.FileProvider
+import com.otaliastudios.cameraview.CameraUtils
+import com.otaliastudios.cameraview.PictureResult
+import com.otaliastudios.cameraview.controls.PictureFormat
+import com.otaliastudios.cameraview.size.AspectRatio
+import java.io.File
+
+class PicturePreviewActivity : AppCompatActivity() {
+
+    companion object {
+        var pictureResult: PictureResult? = null
+    }
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_picture_preview)
+        val result = pictureResult ?: run {
+            finish()
+            return
+        }
+        val imageView = findViewById<ImageView>(R.id.image)
+        val captureResolution = findViewById<MessageView>(R.id.nativeCaptureResolution)
+        val captureLatency = findViewById<MessageView>(R.id.captureLatency)
+        val exifRotation = findViewById<MessageView>(R.id.exifRotation)
+
+        val delay = intent.getLongExtra("delay", 0)
+        val ratio = AspectRatio.of(result.size)
+        captureLatency.setTitleAndMessage("Approx. latency", "$delay milliseconds")
+        captureResolution.setTitleAndMessage("Resolution", "${result.size} ($ratio)")
+        exifRotation.setTitleAndMessage("EXIF rotation", result.rotation.toString())
+
+        try {
+            result.toBitmap(1000, 1000) { bitmap -> imageView.setImageBitmap(bitmap) }
+        } catch (e: UnsupportedOperationException) {
+            imageView.setImageDrawable(ColorDrawable(Color.GREEN))
+            Toast.makeText(this, "Can't preview this format: " + result.format, Toast.LENGTH_LONG).show()
+        }
+        if (result.isSnapshot) {
+            // Log the real size for debugging reason.
+            val options = BitmapFactory.Options()
+            options.inJustDecodeBounds = true
+            BitmapFactory.decodeByteArray(result.data, 0, result.data.size, options)
+            if (result.rotation % 180 != 0) {
+                Log.e("PicturePreview", "The picture full size is ${result.size.height}x${result.size.width}")
+            } else {
+                Log.e("PicturePreview", "The picture full size is ${result.size.width}x${result.size.height}")
+            }
+        }
+    }
+
+    override fun onDestroy() {
+        super.onDestroy()
+        if (!isChangingConfigurations) {
+            pictureResult = null
+        }
+    }
+
+    override fun onCreateOptionsMenu(menu: Menu): Boolean {
+        menuInflater.inflate(R.menu.share, menu)
+        return true
+    }
+
+    override fun onOptionsItemSelected(item: MenuItem): Boolean {
+        if (item.itemId == R.id.share) {
+            Toast.makeText(this, "Sharing...", Toast.LENGTH_SHORT).show()
+            val extension = when (requireNotNull(pictureResult).format) {
+                PictureFormat.JPEG -> "jpg"
+                PictureFormat.DNG -> "dng"
+                else -> throw RuntimeException("Unknown format.")
+            }
+            val destFile = File(filesDir, "picture.$extension")
+            CameraUtils.writeToFile(requireNotNull(pictureResult?.data), destFile) { file ->
+                if (file != null) {
+                    val context = this@PicturePreviewActivity
+                    val intent = Intent(Intent.ACTION_SEND)
+                    intent.type = "image/*"
+                    val uri = FileProvider.getUriForFile(context,
+                            context.packageName + ".provider", file)
+                    intent.putExtra(Intent.EXTRA_STREAM, uri)
+                    intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
+                    startActivity(intent)
+                } else {
+                    Toast.makeText(this@PicturePreviewActivity,
+                            "Error while writing file.",
+                            Toast.LENGTH_SHORT).show()
+                }
+            }
+            return true
+        }
+        return super.onOptionsItemSelected(item)
+    }
+}

demo/src/main/kotlin/com/otaliastudios/cameraview/demo/VideoPreviewActivity.kt

@@ -0,0 +1,107 @@
+package com.otaliastudios.cameraview.demo
+
+import android.content.Intent
+import android.net.Uri
+import android.os.Bundle
+import android.util.Log
+import android.view.Menu
+import android.view.MenuItem
+import android.widget.MediaController
+import android.widget.Toast
+import android.widget.VideoView
+import androidx.appcompat.app.AppCompatActivity
+import androidx.core.content.FileProvider
+import com.otaliastudios.cameraview.VideoResult
+import com.otaliastudios.cameraview.size.AspectRatio
+
+class VideoPreviewActivity : AppCompatActivity() {
+    companion object {
+        var videoResult: VideoResult? = null
+    }
+
+    private val videoView: VideoView by lazy { findViewById<VideoView>(R.id.video) }
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_video_preview)
+        val result = videoResult ?: run {
+            finish()
+            return
+        }
+        videoView.setOnClickListener { playVideo() }
+        val actualResolution = findViewById<MessageView>(R.id.actualResolution)
+        val isSnapshot = findViewById<MessageView>(R.id.isSnapshot)
+        val rotation = findViewById<MessageView>(R.id.rotation)
+        val audio = findViewById<MessageView>(R.id.audio)
+        val audioBitRate = findViewById<MessageView>(R.id.audioBitRate)
+        val videoCodec = findViewById<MessageView>(R.id.videoCodec)
+        val audioCodec = findViewById<MessageView>(R.id.audioCodec)
+        val videoBitRate = findViewById<MessageView>(R.id.videoBitRate)
+        val videoFrameRate = findViewById<MessageView>(R.id.videoFrameRate)
+
+        val ratio = AspectRatio.of(result.size)
+        actualResolution.setTitleAndMessage("Size", "${result.size} ($ratio)")
+        isSnapshot.setTitleAndMessage("Snapshot", result.isSnapshot.toString())
+        rotation.setTitleAndMessage("Rotation", result.rotation.toString())
+        audio.setTitleAndMessage("Audio", result.audio.name)
+        audioBitRate.setTitleAndMessage("Audio bit rate", "${result.audioBitRate} bits per sec.")
+        videoCodec.setTitleAndMessage("VideoCodec", result.videoCodec.name)
+        audioCodec.setTitleAndMessage("AudioCodec", result.audioCodec.name)
+        videoBitRate.setTitleAndMessage("Video bit rate", "${result.videoBitRate} bits per sec.")
+        videoFrameRate.setTitleAndMessage("Video frame rate", "${result.videoFrameRate} fps")
+
+        val controller = MediaController(this)
+        controller.setAnchorView(videoView)
+        controller.setMediaPlayer(videoView)
+        videoView.setMediaController(controller)
+        videoView.setVideoURI(Uri.fromFile(result.file))
+        videoView.setOnPreparedListener { mp ->
+            val lp = videoView.layoutParams
+            val videoWidth = mp.videoWidth.toFloat()
+            val videoHeight = mp.videoHeight.toFloat()
+            val viewWidth = videoView.width.toFloat()
+            lp.height = (viewWidth * (videoHeight / videoWidth)).toInt()
+            videoView.layoutParams = lp
+            playVideo()
+            if (result.isSnapshot) {
+                // Log the real size for debugging reason.
+                Log.e("VideoPreview", "The video full size is " + videoWidth + "x" + videoHeight)
+            }
+        }
+    }
+
+    fun playVideo() {
+        if (!videoView.isPlaying) {
+            videoView.start()
+        }
+    }
+
+    override fun onDestroy() {
+        super.onDestroy()
+        if (!isChangingConfigurations) {
+            videoResult = null
+        }
+    }
+
+    override fun onCreateOptionsMenu(menu: Menu): Boolean {
+        menuInflater.inflate(R.menu.share, menu)
+        return true
+    }
+
+    override fun onOptionsItemSelected(item: MenuItem): Boolean {
+        if (item.itemId == R.id.share) {
+            Toast.makeText(this, "Sharing...", Toast.LENGTH_SHORT).show()
+            val intent = Intent(Intent.ACTION_SEND)
+            intent.type = "video/*"
+            val uri = FileProvider.getUriForFile(this,
+                    this.packageName + ".provider",
+                    videoResult!!.file)
+            intent.putExtra(Intent.EXTRA_STREAM, uri)
+            intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
+            startActivity(intent)
+            return true
+        }
+        return super.onOptionsItemSelected(item)
+    }
+
+}

demo/src/main/res/layout/activity_video_preview.xml

@@ -39,6 +39,11 @@
             android:layout_width="match_parent"
             android:layout_height="wrap_content"/>
 
+        <com.otaliastudios.cameraview.demo.MessageView
+            android:id="@+id/audioCodec"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"/>
+
         <com.otaliastudios.cameraview.demo.MessageView
             android:id="@+id/videoCodec"
             android:layout_width="match_parent"

docs/.gitignore

@@ -3,3 +3,4 @@ _pages
 *.sw?
 .sass-cache
 .jekyll-metadata
+Gemfile.lock

docs/Gemfile.lock

@@ -1,248 +0,0 @@
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-    coffee-script (2.4.1)
-      coffee-script-source
-      execjs
-    coffee-script-source (1.11.1)
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-    commonmarker (0.17.13)
-      ruby-enum (~> 0.5)
-    concurrent-ruby (1.1.4)
-    dnsruby (1.61.2)
-      addressable (~> 2.5)
-    em-websocket (0.5.1)
-      eventmachine (>= 0.12.9)
-      http_parser.rb (~> 0.6.0)
-    ethon (0.11.0)
-      ffi (>= 1.3.0)
-    eventmachine (1.2.7)
-    execjs (2.7.0)
-    faraday (0.15.4)
-      multipart-post (>= 1.2, < 3)
-    ffi (1.9.25)
-    forwardable-extended (2.6.0)
-    gemoji (3.0.0)
-    github-pages (193)
-      activesupport (= 4.2.10)
-      github-pages-health-check (= 1.8.1)
-      jekyll (= 3.7.4)
-      jekyll-avatar (= 0.6.0)
-      jekyll-coffeescript (= 1.1.1)
-      jekyll-commonmark-ghpages (= 0.1.5)
-      jekyll-default-layout (= 0.1.4)
-      jekyll-feed (= 0.11.0)
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-      jekyll (~> 3.5)
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-      jekyll (~> 3.5)
-      jekyll-seo-tag (~> 2.0)
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-      jekyll (~> 3.5)
-      jekyll-seo-tag (~> 2.0)
-    jekyll-theme-leap-day (0.1.1)
-      jekyll (~> 3.5)
-      jekyll-seo-tag (~> 2.0)
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-      jekyll (~> 3.5)
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-      jekyll (~> 3.5)
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-    jekyll-theme-modernist (0.1.1)
-      jekyll (~> 3.5)
-      jekyll-seo-tag (~> 2.0)
-    jekyll-theme-primer (0.5.3)
-      jekyll (~> 3.5)
-      jekyll-github-metadata (~> 2.9)
-      jekyll-seo-tag (~> 2.0)
-    jekyll-theme-slate (0.1.1)
-      jekyll (~> 3.5)
-      jekyll-seo-tag (~> 2.0)
-    jekyll-theme-tactile (0.1.1)
-      jekyll (~> 3.5)
-      jekyll-seo-tag (~> 2.0)
-    jekyll-theme-time-machine (0.1.1)
-      jekyll (~> 3.5)
-      jekyll-seo-tag (~> 2.0)
-    jekyll-titles-from-headings (0.5.1)
-      jekyll (~> 3.3)
-    jekyll-watch (2.1.2)
-      listen (~> 3.0)
-    jemoji (0.10.1)
-      gemoji (~> 3.0)
-      html-pipeline (~> 2.2)
-      jekyll (~> 3.0)
-    kramdown (1.17.0)
-    liquid (4.0.0)
-    listen (3.1.5)
-      rb-fsevent (~> 0.9, >= 0.9.4)
-      rb-inotify (~> 0.9, >= 0.9.7)
-      ruby_dep (~> 1.2)
-    mercenary (0.3.6)
-    mini_portile2 (2.4.0)
-    minima (2.5.0)
-      jekyll (~> 3.5)
-      jekyll-feed (~> 0.9)
-      jekyll-seo-tag (~> 2.1)
-    minitest (5.11.3)
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-      mini_portile2 (~> 2.4.0)
-    octokit (4.13.0)
-      sawyer (~> 0.8.0, >= 0.5.3)
-    pathutil (0.16.2)
-      forwardable-extended (~> 2.6)
-    public_suffix (2.0.5)
-    rb-fsevent (0.10.3)
-    rb-inotify (0.10.0)
-      ffi (~> 1.0)
-    rouge (2.2.1)
-    ruby-enum (0.7.2)
-      i18n
-    ruby_dep (1.5.0)
-    rubyzip (1.2.2)
-    safe_yaml (1.0.4)
-    sass (3.7.2)
-      sass-listen (~> 4.0.0)
-    sass-listen (4.0.0)
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-      rb-inotify (~> 0.9, >= 0.9.7)
-    sawyer (0.8.1)
-      addressable (>= 2.3.5, < 2.6)
-      faraday (~> 0.8, < 1.0)
-    terminal-table (1.8.0)
-      unicode-display_width (~> 1.1, >= 1.1.1)
-    thread_safe (0.3.6)
-    typhoeus (1.3.1)
-      ethon (>= 0.9.0)
-    tzinfo (1.2.5)
-      thread_safe (~> 0.1)
-    unicode-display_width (1.4.0)
-
-PLATFORMS
-  ruby
-
-DEPENDENCIES
-  github-pages
-
-BUNDLED WITH
-   1.17.2

docs/_about/changelog.md

@@ -9,6 +9,58 @@ New versions are released through GitHub, so the reference page is the [GitHub R
 > Starting from 2.4.0, you can now [support development](https://github.com/sponsors/natario1) through the GitHub Sponsors program. 
 Companies can share a tiny part of their revenue and get private support hours in return. Thanks!
 
+##### v2.7.2
+
+- Fix: fix camera rotation handling for Compose apps and other specific scenarios ([#1117][1117])
+
+<https://github.com/natario1/CameraView/compare/v2.7.1...v2.7.2>
+
+##### v2.7.1
+
+- Fix: fix preview issues on Pixel 4A with certain FPS, thanks to [@honzasmuk][honzasmuk] ([#1089][1089])
+- Improvement: don't catch gestures if they're turned off, thanks to [@ObsidianX][ObsidianX] ([#1068][1068])
+- New: new flag cameraDrawHardwareOverlays and setDrawHardwareOverlays() to draw overlays on hardware canvas, thanks to [@ObsidianX][ObsidianX] ([#1066][1066])
+- Publish on Maven Central instead of JCenter
+
+<https://github.com/natario1/CameraView/compare/v2.7.0...v2.7.1>
+
+##### v2.7.0
+
+- New: onPictureShutter() callback when taking pictures, thanks to [@EzequielAdrianM][EzequielAdrianM] ([#1030][1030])
+- New: GestureAction.TAKE_PICTURE_SNAPSHOT lets you take snapshots on gesture, thanks to [@EzequielAdrianM][EzequielAdrianM] ([#1030][1030])
+- Improvement: try-catch internal exception when takePicture fails, thanks to [@michaelspecht][michaelspecht] ([#1024][1024])
+- Improvement: log errors when file writing fails, thanks to [@bwt][bwt] ([#960][960])
+- Fix: Avoid preview deadlocks ([#1020][1020])
+- Fix: Workaround for messed-up preview on Pixel 4 ([#1020][1020])
+- Fix: Avoid internal StackOverflow errors ([#992][992])
+
+<https://github.com/natario1/CameraView/compare/v2.6.4...v2.7.0>
+
+##### v2.6.4
+
+- Fix: Fix many small bugs ([#953][953])
+
+<https://github.com/natario1/CameraView/compare/v2.6.3...v2.6.4>
+
+##### v2.6.3
+
+- <small>[Video]</small> New: `setAudioCodec` and `app:cameraAudioCodec` to choose the audio encoding format, thanks to [@EverydayPineapple][EverydayPineapple] ([#861][861])
+- <small>[Camera1, Frame processing]</small> Fix: frame processing restarts automatically after taking a picture, thanks to [@jeffreyfjohnson][jeffreyfjohnson] ([#877][877])
+- <small>[Camera1]</small> Improvement: catch more errors in Camera1 lifecycle to avoid crashes, thanks to [@Namazed][Namazed] ([#851][851] and [#897][897])
+- <small>[CameraView]</small> Improvement: `setLifecycleOwner` is now nullable and will unbind the lifecycle, thanks to [@Namazed][Namazed] ([#798][798])
+- <small>[Preview]</small> Improvement: the `CameraPreview` APIs are much more friendly for subclassing ([#816][816])
+
+<https://github.com/natario1/CameraView/compare/v2.6.2...v2.6.3>
+
+##### v2.6.2
+
+- <small>[Frame processing]</small> New: `frame.getRotationToUser()` and `frame.getRotationToView()` APIs to help with processing vs. rendering ([#745][745])
+- <small>[Camera1, Camera2]</small> New: `cameraPreviewFrameRateExact="true|false"` to tell whether the desired preview frame rate should be as exact as possible, thanks to [@hualong-shen][hualong-shenn] ([#754][754])
+- <small>[Logging]</small> Improvement: `CameraLogger` is now thread safe, thanks to [@Namazed][Namazed] ([#779][779])
+- <small>[Permissions]</small> Improvement: added runtime API `setRequestPermissions()` that matches the XML attribute, thanks to [@Namazed][Namazed] ([#775][775])
+
+<https://github.com/natario1/CameraView/compare/v2.6.1...v2.6.2>
+
 ##### v2.6.1
 
 - <small>[Video]</small> New: `takeVideo(FileDescriptor)` for file descriptors, thanks to [@sewar][sewar] ([#732][732])
@@ -297,6 +349,7 @@ This is the last release before v2.
 
 [aartikov]: https://github.com/aartikov
 [athornz]: https://github.com/athornz
+[bwt]: https://github.com/bwt
 [v-gar]: https://github.com/v-gar
 [andrewmunn]: https://github.com/andrewmunn
 [chaitanyaraghav]: https://github.com/chaitanyaraghav
@@ -316,6 +369,13 @@ This is the last release before v2.
 [RAN3000]: https://github.com/RAN3000
 [vaibhavbhandula]: https://github.com/vaibhavbhandula
 [sewar]: https://github.com/sewar
+[hualong-shen]: https://github.com/hualong-shen
+[EverydayPineapple]: https://github.com/EverydayPineapple
+[jeffreyfjohnson]: https://github.com/jeffreyfjohnson
+[michaelspecht]: https://github.com/michaelspecht
+[EzequielAdrianM]: https://github.com/EzequielAdrianM
+[honzasmuk]: https://github.com/honzasmuk
+[ObsidianX]: https://github.com/ObsidianX
 
 
 [73]: https://github.com/natario1/CameraView/pull/73
@@ -403,3 +463,23 @@ This is the last release before v2.
 [724]: https://github.com/natario1/CameraView/pull/724
 [732]: https://github.com/natario1/CameraView/pull/732
 [741]: https://github.com/natario1/CameraView/pull/741
+[745]: https://github.com/natario1/CameraView/pull/745
+[754]: https://github.com/natario1/CameraView/pull/754
+[775]: https://github.com/natario1/CameraView/pull/775
+[779]: https://github.com/natario1/CameraView/pull/779
+[798]: https://github.com/natario1/CameraView/pull/798
+[816]: https://github.com/natario1/CameraView/pull/816
+[851]: https://github.com/natario1/CameraView/pull/851
+[861]: https://github.com/natario1/CameraView/pull/861
+[877]: https://github.com/natario1/CameraView/pull/877
+[897]: https://github.com/natario1/CameraView/pull/897
+[953]: https://github.com/natario1/CameraView/pull/953
+[960]: https://github.com/natario1/CameraView/pull/960
+[992]: https://github.com/natario1/CameraView/pull/992
+[1020]: https://github.com/natario1/CameraView/pull/1020
+[1024]: https://github.com/natario1/CameraView/pull/1024
+[1030]: https://github.com/natario1/CameraView/pull/1030
+[1089]: https://github.com/natario1/CameraView/pull/1089
+[1068]: https://github.com/natario1/CameraView/pull/1068
+[1066]: https://github.com/natario1/CameraView/pull/1066
+[1117]: https://github.com/natario1/CameraView/pull/1117

docs/_about/faq.md

@@ -0,0 +1,95 @@
+---
+layout: page
+title: "FAQs"
+description: "Frequently asked questions"
+order: 4
+disqus: 1
+---
+
+### Usage
+
+##### Q: Why is front camera flipped horizontally when using takePicture() or takeVideo() ?
+
+A: It's actually not flipped - if you show your left hand, the person in the picture will show its left hand as well,
+so this is the accurate representation of reality.
+
+However, if you want to flip the result horizontally to match the preview,
+you can do so by using the [snapshot APIs](../docs/capturing-media), which will respect what is shown in the preview.
+
+##### Q: Can I use filters / overlays / cropping with takePicture() instead of takePictureSnapshot() ?
+
+A: No, these features are only available with the snapshot API.
+
+##### Q: Can I use filters / overlays / cropping with takeVideo() instead of takeVideoSnapshot() ?
+
+A: No, these features are only available with the snapshot API.
+
+##### Q: How can I improve takePictureSnapshot() quality?
+
+A: The picture quality can be controlled in two ways:
+- By [changing the snapshot size](../docs/snapshot-size)
+- By [enabling metering](../docs/metering#picture-metering).
+
+##### Q: How can I improve takeVideoSnapshot() quality?
+
+A: The video quality can be controlled as follows:
+- By changing the [snapshot size](../docs/snapshot-size)
+- By changing the [snapshot framerate](../docs/controls#cameraPreviewFrameRate) (carefully: high values can cause dark preview)
+- By changing the [video bitrate](../docs/controls#cameraVideoBitRate)
+- By changing the [audio bitrate](../docs/controls#cameraAudioBitRate)
+
+##### Q: How can I reduce the picture size?
+
+A: The only control here is the picture size.
+- When using `takePicture()`, change the [capture size](../docs/capture-size)
+- When using `takePictureSnapshot()`, change the [snapshot size](../docs/snapshot-size)
+
+##### Q: How can I reduce the video size?
+
+A: By using video controls, for instance:
+- Change the [video bitrate](../docs/controls#cameraVideoBitRate)
+- Change the [audio bitrate](../docs/controls#cameraAudioBitRate)
+- When using `takeVideo()`, change the [capture size](../docs/capture-size)
+- When using `takeVideoSnapshot()`, change the [snapshot size](../docs/snapshot-size)
+
+##### Q: Why is my preview / snapshot dark?
+
+A: This is often caused by bad [framerate](../docs/controls#cameraPreviewFrameRate). Try using
+a lower value, so that there's more time for frame exposure.
+
+### Project Management
+
+##### Q: I have found a bug with Camera1, can you fix it?
+
+A: No, we will not address Camera1 bugs anymore - development is focused on Camera2. However, if you find a solution,
+feel free to open a GitHub issue or pull requests to discuss.
+
+##### Q: I have found a bug with my device XYZ, can you fix it?
+
+A: No. Unless it's a device that we physically own, there is very little chance that a device-specific issues
+can be solved by the maintainers. We encourage you to investigate on your own and get back to us
+with a clear understanding of the problem and the solution.
+
+##### Q: Why don't you review / comment on my GitHub issue?
+
+A: Either because the issue did not respect the provided template, or because I don't have time.
+If you are sure about the template, you can get private support by [sponsoring the project](../extra/donate).
+
+##### Q: Why don't you review / comment on my GitHub pull requests?
+
+A: Either because the pull requests did not respect the provided template, or because I don't have time.
+If you are sure about the template, you can get private support by [sponsoring the project](../extra/donate).
+
+##### Q: When will you do a new release?
+
+A: We don't have a release schedule. New releases happen when there's enough changes to justify one,
+and maintainers have had time to execute and publish the release. You can speed things up by 
+[sponsoring the project](../extra/donate) or pull snapshots from [jitpack.io](https://jitpack.io):
+
+```groovy
+implementation 'com.github.natario1:CameraView:main-SNAPSHOT'
+implementation 'com.github.natario1:CameraView:<commit hash>'
+```
+
+Check their website for more information about how to set things up.
+

docs/_about/install.md

@@ -7,21 +7,32 @@ order: 1
 
 The library works on API 15+, which is the only requirement and should be met by most projects nowadays.
 
-It is publicly hosted on [JCenter](https://bintray.com/natario/android/CameraView), where you
+It is publicly hosted on [Maven Central](https://repo.maven.apache.org/maven2/com/otaliastudios/cameraview), where you
-can download the AAR package. To fetch with Gradle, make sure you add the JCenter repository in your root projects `build.gradle` file:
+can download the AAR package. To fetch with Gradle, make sure you add the Maven Central repository:
 
-```groovy
+```kotlin
-allprojects {
 repositories {
-    jcenter()
+  mavenCentral()
-  }
 }
 ```
 
 Then simply download the latest version:
 
-```groovy
+```kotlin
-api 'com.otaliastudios:cameraview:{{ site.github_version }}'
+api("com.otaliastudios:cameraview:{{ site.github_version }}")
+```
+
+No other configuration steps are needed. If you want to try features that were not released yet,
+you can pull the latest snapshot by adding the Sonatype snapshot repository:
+
+```kotlin
+repositories {
+  maven("https://s01.oss.sonatype.org/content/repositories/snapshots/")
+}
 ```
 
-No other configuration steps are needed.
+And depending on the latest-SNAPSHOT version:
+
+```kotlin
+api("com.otaliastudios:cameraview:latest-SNAPSHOT")
+```

docs/_config.yml

@@ -12,8 +12,8 @@ google_analytics_id: 'UA-155077779-1'
 google_site_verification: '4x49i17ABIrSvUl52SeL0-t0341aTnWWaC62-FYCRT4'
 github: [metadata] # TODO What's this?
 github_repo: CameraView
-github_version: 2.6.1
+github_version: 2.7.2
-github_branch: master
+github_branch: main
 baseurl: '/CameraView' # Keep as an empty string if served up at the root
 collections:
   about:

docs/_docs/capturing-media.md

@@ -46,9 +46,9 @@ resulting snapshots are square as well, no matter what the sensor available size
 |`takePictureSnapshot()`|Pictures|Snapshot|`yes`|`yes`|`yes`|That of the preview stream, [or less](snapshot-size)|
 |`takeVideoSnapshot(File)`|Videos|Snapshot|`yes`|`yes`|`yes`|That of the preview stream, [or less](snapshot-size)|
 
-> Please note that the video snaphot features requires:
+> Please note that the video snapshot features require:
-> - API 18. If called before, it throws
+> - API 18. If called on earlier versions, it throws an `IllegalStateException`
-> - An OpenGL preview (see [previews](previews)). If not, it throws
+> - An OpenGL preview (see [previews](previews)). If not, it throws an `IllegalStateException`
 
 ### Capturing pictures while recording
 
@@ -69,6 +69,11 @@ This is allowed at the following conditions:
 ```java
 camera.addCameraListener(new CameraListener() {
 
+    @Override
+    public void onPictureShutter() {
+        // Picture capture started!
+    }
+    
     @Override
     public void onPictureTaken(@NonNull PictureResult result) {
         // A Picture was taken!

docs/_docs/controls.md

@@ -70,6 +70,24 @@ cameraView.setVideoCodec(VideoCodec.H_263);
 cameraView.setVideoCodec(VideoCodec.H_264);
 ```
 
+##### cameraAudioCodec
+
+Sets the audio encoder for video recordings. Defaults to `DEVICE_DEFAULT`,
+which should typically be AAC.
+The available values are exposed through the `CameraOptions` object.
+
+`AudioCodec.HE_AAC` and `AudioCodec.AAC_ELD` require at least JellyBean.
+
+The library will safely fall back to device default if the min API requirements
+are not met.
+
+```java
+cameraView.setAudioCodec(AudioCodec.DEVICE_DEFAULT);
+cameraView.setAudioCodec(AudioCodec.AAC);
+cameraView.setAudioCodec(AudioCodec.HE_AAC);
+cameraView.setAudioCodec(AudioCodec.AAC_ELD);
+```
+
 ##### cameraWhiteBalance
 
 Sets the desired white balance for the current session.

docs/_docs/filters.md

@@ -25,7 +25,7 @@ flag to use it. The only condition is to use the `Preview.GL_SURFACE` preview.
 Real-time filters are applied at creation time, through the `app:cameraFilter` XML attribute,
 or anytime during the camera lifecycle using `cameraView.setFilter()`.
 
-We offers a reasonable amount of filters through the `Filters` class, for example:
+We offer a reasonable amount of filters through the `Filters` class, for example:
 
 ```java
 cameraView.setFilter(Filters.BLACK_AND_WHITE.newInstance());

docs/_docs/frame-processing.md

@@ -29,7 +29,7 @@ cameraView.addFrameProcessor(new FrameProcessor() {
             // Process android.media.Image...
         }
     }
-}
+});
 ```
 
 For your convenience, the `FrameProcessor` method is run in a background thread so you can do your job
@@ -120,7 +120,7 @@ You can check which formats are available for use through `CameraOptions.getSupp
 ### Advanced: Thread Control
 
 Starting from `v2.5.1`, you can control the number of background threads that are allocated
-for frame processing work. This should further push you into perform processing actions synchronously
+for frame processing work. This should further push you into performing processing actions synchronously
 and can be useful if processing is very slow with respect to the preview frame rate, in order to
 avoid dropping too many frames.
 

docs/_docs/gestures.md

@@ -24,8 +24,8 @@ Simple as that. There are two things to be noted:
 |Gesture|Description|Can be mapped to|
 |-------------|-----------|----------------|
 |`PINCH`|Pinch gesture, typically assigned to the zoom control.|`ZOOM` `EXPOSURE_CORRECTION` `FILTER_CONTROL_1` `FILTER_CONTROL_2` `NONE`|
-|`TAP`|Single tap gesture, typically assigned to the focus control.|`AUTO_FOCUS` `TAKE_PICTURE` `NONE`|
+|`TAP`|Single tap gesture, typically assigned to the focus control.|`AUTO_FOCUS` `TAKE_PICTURE` `TAKE_PICTURE_SNAPSHOT` `NONE`|
-|`LONG_TAP`|Long tap gesture.|`AUTO_FOCUS` `TAKE_PICTURE` `NONE`|
+|`LONG_TAP`|Long tap gesture.|`AUTO_FOCUS` `TAKE_PICTURE` `TAKE_PICTURE_SNAPSHOT` `NONE`|
 |`SCROLL_HORIZONTAL`|Horizontal movement gesture.|`ZOOM` `EXPOSURE_CORRECTION` `FILTER_CONTROL_1` `FILTER_CONTROL_2` `NONE`|
 |`SCROLL_VERTICAL`|Vertical movement gesture.|`ZOOM` `EXPOSURE_CORRECTION` `FILTER_CONTROL_1` `FILTER_CONTROL_2` `NONE`|
 
@@ -38,6 +38,7 @@ Looking at this from the other side:
 |`NONE`|Disables this gesture.|`TAP` `LONG_TAP` `PINCH` `SCROLL_HORIZONTAL` `SCROLL_VERTICAL`|
 |`AUTO_FOCUS`|Launches a [touch metering operation](metering#touch-metering) on the finger position.|`TAP` `LONG_TAP`|
 |`TAKE_PICTURE`|Takes a picture using [takePicture](capturing-media).|`TAP` `LONG_TAP`|
+|`TAKE_PICTURE_SNAPSHOT`|Takes a picture using [takePictureSnapshot](capturing-media).|`TAP` `LONG_TAP`|
 |`ZOOM`|[Zooms](controls#zoom) in or out.|`PINCH` `SCROLL_HORIZONTAL` `SCROLL_VERTICAL`|
 |`EXPOSURE_CORRECTION`|Controls the [exposure correction](metering#exposure-correction).|`PINCH` `SCROLL_HORIZONTAL` `SCROLL_VERTICAL`|
 |`FILTER_CONTROL_1`|Controls the first parameter (if any) of a [real-time filter](filters).|`PINCH` `SCROLL_HORIZONTAL` `SCROLL_VERTICAL`|
@@ -48,8 +49,8 @@ Looking at this from the other side:
 ```xml
 <com.otaliastudios.cameraview.CameraView
     app:cameraGesturePinch="zoom|exposureCorrection|filterControl1|filterControl2|none"
-    app:cameraGestureTap="autoFocus|takePicture|none"
+    app:cameraGestureTap="autoFocus|takePicture|takePictureSnapshot|none"
-    app:cameraGestureLongTap="autoFocus|takePicture|none"
+    app:cameraGestureLongTap="autoFocus|takePicture|takePictureSnapshot|none"
     app:cameraGestureScrollHorizontal="zoom|exposureCorrection|filterControl1|filterControl2|none"
     app:cameraGestureScrollVertical="zoom|exposureCorrection|filterControl1|filterControl2|none"/>
 ```

docs/_docs/metering.md

@@ -53,7 +53,7 @@ This action needs the coordinates of a point or region computed with respect to
 
 ```java
 // Start touch metering at the center:
-cameraView.startAutoFocus(cameraView.getWidth() / 2F, cameraView.getHeight/() / 2F);
+cameraView.startAutoFocus(cameraView.getWidth() / 2F, cameraView.getHeight() / 2F);
 // Start touch metering within a given area,
 // like the bounding box of a face.
  cameraView.startAutoFocus(rect);
@@ -102,7 +102,7 @@ cameraView.setAutoFocusMarker(new DefaultAutoFocusMarker());
 
 ##### Touch Metering Reset Delay
 
-You control control how a touch metering operation is reset after completed.
+You control how a touch metering operation is reset after being completed.
 Setting a negative value (or 0, or `Long.MAX_VALUE`) will not reset the metering values.
 This is useful for low end devices that have slow auto-focus capabilities.
 Defaults to 3 seconds.

docs/_docs/preview-size.md

@@ -66,7 +66,7 @@ by the engine. The default selector will do the following:
 - Constraint 2: match sizes a bit bigger than the View (so there is no upscaling)
 - Try to match both, or just one, or fallback to the biggest available size
 
-There are not so many reason why you would replace this, other than control the frame processor size
+There are not so many reasons why you would replace this, other than to control the frame processor size
 or, indirectly, the snapshot size. You can, however, hook into the process using `setPreviewStreamSize(SizeSelector)`:
 
 ```java
@@ -79,7 +79,7 @@ cameraView.setPreviewStreamSize(new SizeSelector() {
 });
 ```
 
-After the preview stream size is determined, if it has changed since list time, the `CameraView` will receive
+After the preview stream size is determined, if it has changed since last time, the `CameraView` will receive
 another call to `onMeasure` so the `WRAP_CONTENT` magic can take place.
 
 To understand how SizeSelectors work and the available utilities, please read the [Capture Size](capture-size) document.

docs/_docs/runtime-permissions.md

@@ -46,4 +46,4 @@ The automatic request is currently done at the activity level, so the permission
 `onRequestPermissionResults()` will be invoked on the parent activity, not the fragment.
 
 The automatic request can be disabled by setting `app:cameraRequestPermissions="false"` in your
-XML declaration.
+XML declaration or by using this method `setRequestPermissions(boolean requestPermissions)` in your code.

docs/_docs/watermarks-and-overlays.md

@@ -45,8 +45,8 @@ Any changes in the overlay appearance will be recorded in real-time in the pictu
 or video snapshot that you are capturing.
  
 As you can see in the example, you can also selectively choose, for each overlay, whether it
-will draw on the preview (`layout_drawOnPreview`), on picture snapshots (`layout_drawOnPreview`), 
+will draw on the preview (`layout_drawOnPreview`), on picture snapshots (`layout_drawOnPictureSnapshot`), 
-on video snapshots (`layout_drawOnPreview`).
+on video snapshots (`layout_drawOnVideoSnapshot`).
  
 ### Advanced Usage
 
@@ -82,3 +82,19 @@ params.drawOnVideoSnapshot = false; // do not draw on video snapshots
 // When done, apply
 overlay.setLayoutParams(params);
 ```
+
+To capture a hardware rendered View such as a video rendered to a TextureView, enable the
+`cameraDrawHardwareOverlays` flag:
+
+```xml
+<com.otaliastudios.cameraview.CameraView
+    android:layout_width="wrap_content"
+    android:layout_height="wrap_content"
+    app:cameraDrawHardwareOverlays="true"/>
+```
+
+Alternatively you can enable it in code with `setDrawHardwareOverlays()`:
+
+```java
+cameraView.setDrawHardwareOverlays(true);
+```

docs/_extra/contributing.md

@@ -48,4 +48,4 @@ and [Google's CameraView](https://github.com/google/cameraview), but has been co
 
 CameraKit's source code is licensed under the [MIT](https://github.com/wonderkiln/CameraKit-Android/blob/master/LICENSE) license.
 
-CameraView is licensed under the [MIT](https://github.com/natario1/CameraView/blob/master/LICENSE) license as well.
+CameraView is licensed under the [MIT](https://github.com/natario1/CameraView/blob/main/LICENSE) license as well.

docs/_extra/v1-migration-guide.md

@@ -105,8 +105,8 @@ which means that **square videos** or any other ratio are possible.
 The video snapshot supports audio and respects the `Audio`, max duration, max size & codec settings,
 which makes it a powerful tool. The drawback is that it needs:
 
-- API 18. If called before, it throws
+- API 18. If called on earlier versions, it throws an `IllegalStateException`
-- An OpenGL preview (see below). If not, it throws
+- An OpenGL preview (see below). If not, it throws an `IllegalStateException`
 
 ##### Video capturing
 Some new APIs were introduced, which are respected by both standard videos and snapshot videos:
@@ -141,7 +141,7 @@ smart enough to
 - respect the picture/video aspect ratio
 - be a bit bigger than the view so that there is no upscaling
 
-There are not so many reason why you would use this method, other than, for example, control the frame
+There are not so many reasons why you would use this method, other than, for example, to control the frame
 processor size or, indirectly, the snapshots size. If what you are doing is just assigning an aspect ratio, 
 for instance, please do so using `setPictureSize()` and `setVideoSize()`.
 

docs/_layouts/main.html

@@ -5,6 +5,7 @@
         <title>{{ site.title }}{% if page.title %} | {{ page.title }}{% endif %}</title>
         <link rel="stylesheet" href="{{ site.baseurl }}/css/main.css">
         <link rel="stylesheet" href="{{ site.baseurl }}/css/fonts_responsive.css">
+        <link rel="stylesheet" href="{{ site.baseurl }}/css/carbon.css">
     </head>
     <body>
         {% include header.html %}

docs/_layouts/page.html

@@ -2,10 +2,15 @@
 layout: main
 ---
 
-<div class="page-header border-bottom has-divider pb-3">
+<div class="page-header border-bottom has-divider pb-3 d-flex flex-column flex-sm-row flex-nowrap align-items-start">
+    <div class="flex-grow-1">
         <h1 class="d-inline-block mt-1 mb-0 mr-2">{{ page.title }}</h1>
-    {% if page.description %}<span class="mr-2">{{ page.description }}</span>{% endif %}
+        {% if page.description %}<div><span class="mr-2">{{ page.description }}</span></div>{% endif %}
-    <span><a href="https://github.com/{{ site.author.github }}/{{ site.github_repo }}/edit/{{ site.github_branch }}/docs/{{ page.path }}">[edit this page]</a></span>
+        <div><span><a href="https://github.com/{{ site.author.github }}/{{ site.github_repo }}/edit/{{ site.github_branch }}/docs/{{ page.path }}">[edit this page]</a></span></div>
+    </div>
+    <div class="flex-shrink-0 pt-2 pl-sm-2">
+        <script async type="text/javascript" src="//cdn.carbonads.com/carbon.js?serve=CE7DL27Y&placement=natario1githubio" id="_carbonads_js"></script>
+    </div>
 </div>
 <div class="page my-4">
     {{ content }}