Added audio on/off feature for video recording (#33)

README.md

@@ -295,7 +295,8 @@ Most camera parameters can be controlled through XML attributes or linked method
     app:cameraJpegQuality="100"
     app:cameraVideoQuality="480p"
     app:cameraWhiteBalance="auto"
-    app:cameraHdr="off" />
+    app:cameraHdr="off"
+    app:cameraAudio="on"/>
 ```
 
 |XML Attribute|Method|Values|Default Value|
@@ -309,6 +310,7 @@ Most camera parameters can be controlled through XML attributes or linked method
 |[`cameraVideoQuality`](#cameravideoquality)|`setVideoQuality()`|`lowest` `highest` `maxQvga` `max480p` `max720p` `max1080p` `max2160p`|`max480p`|
 |[`cameraWhiteBalance`](#camerawhitebalance)|`setWhiteBalance()`|`auto` `incandescent` `fluorescent` `daylight` `cloudy`|`auto`|
 |[`cameraHdr`](#camerahdr)|`setHdr()`|`off` `on`|`off`|
+|[`cameraAudio`](#cameraaudio)|`setAudio()`|`off` `on`|`on`|
 
 #### cameraSessionType
 
@@ -404,6 +406,15 @@ cameraView.setHdr(Hdr.OFF);
 cameraView.setHdr(Hdr.ON);
 ```
 
+#### cameraAudio
+
+Turns on or off audio stream.
+
+```java
+cameraView.setAudio(Audio.OFF);
+cameraView.setAudio(Audio.ON);
+```
+
 ## Other APIs
 
 Other APIs not mentioned above are provided, and are well documented and commented in code.

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

@@ -78,6 +78,11 @@ public class MockCameraController extends CameraController {
         mHdr = hdr;
     }
 
+    @Override
+    void setAudio(Audio audio) {
+        mAudio = audio;
+    }
+
     @Override
     void setLocation(Location location) {
         mLocation = location;

cameraview/src/main/java/com/otaliastudios/cameraview/Camera1.java

@@ -291,6 +291,17 @@ class Camera1 extends CameraController {
         return false;
     }
 
+
+    @Override
+    void setAudio(Audio audio) {
+        if (mAudio != audio) {
+            if (mIsCapturingVideo) {
+                LOG.w("Changing audio mode while recording. Changes will take place starting from next video");
+            }
+            mAudio = audio;
+        }
+    }
+
     @Override
     void setFlash(Flash flash) {
         Flash old = mFlash;
@@ -592,13 +603,25 @@ class Camera1 extends CameraController {
         mMediaRecorder.setCamera(mCamera);
 
         mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
-        mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.CAMCORDER);
+
+        CamcorderProfile profile = getCamcorderProfile(mVideoQuality);
+        if (mAudio == Audio.ON) {
+            mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.CAMCORDER);
+            mMediaRecorder.setProfile(profile);
+        } else {
+            // Set all values contained in profile except audio settings
+            mMediaRecorder.setOutputFormat(profile.fileFormat);
+            mMediaRecorder.setVideoEncoder(profile.videoCodec);
+            mMediaRecorder.setVideoEncodingBitRate(profile.videoBitRate);
+            mMediaRecorder.setVideoFrameRate(profile.videoFrameRate);
+            mMediaRecorder.setVideoSize(profile.videoFrameWidth, profile.videoFrameHeight);
+        }
+
         if (mLocation != null) {
             mMediaRecorder.setLocation((float) mLocation.getLatitude(),
                     (float) mLocation.getLongitude());
         }
 
-        mMediaRecorder.setProfile(getCamcorderProfile(mVideoQuality));
         mMediaRecorder.setOutputFile(mVideoFile.getAbsolutePath());
         mMediaRecorder.setOrientationHint(computeExifRotation());
         // Not needed. mMediaRecorder.setPreviewDisplay(mPreview.getSurface());

cameraview/src/main/java/com/otaliastudios/cameraview/Camera2.java

@@ -151,6 +151,11 @@ class Camera2 extends CameraController {
 
     }
 
+    @Override
+    void setAudio(Audio audio) {
+
+    }
+
     @Override
     void setLocation(Location location) {
 

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

@@ -19,6 +19,7 @@ abstract class CameraController implements Preview.SurfaceCallback {
     protected VideoQuality mVideoQuality;
     protected SessionType mSessionType;
     protected Hdr mHdr;
+    protected Audio mAudio;
 
     protected Size mCaptureSize;
     protected Size mPreviewSize;
@@ -101,6 +102,8 @@ abstract class CameraController implements Preview.SurfaceCallback {
 
     abstract void setHdr(Hdr hdr);
 
+    abstract void setAudio(Audio audio);
+
     abstract void setLocation(Location location);
 
     //endregion
@@ -160,6 +163,10 @@ abstract class CameraController implements Preview.SurfaceCallback {
         return mHdr;
     }
 
+    final Audio getAudio() {
+        return mAudio;
+    }
+
     final Size getCaptureSize() {
         return mCaptureSize;
     }

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

@@ -103,6 +103,7 @@ public class CameraView extends FrameLayout {
         VideoQuality videoQuality = VideoQuality.fromValue(a.getInteger(R.styleable.CameraView_cameraVideoQuality, VideoQuality.DEFAULT.value()));
         SessionType sessionType = SessionType.fromValue(a.getInteger(R.styleable.CameraView_cameraSessionType, SessionType.DEFAULT.value()));
         Hdr hdr = Hdr.fromValue(a.getInteger(R.styleable.CameraView_cameraHdr, Hdr.DEFAULT.value()));
+        Audio audio = Audio.fromValue(a.getInteger(R.styleable.CameraView_cameraAudio, Audio.DEFAULT.value()));
 
         // Gestures
         GestureAction tapGesture = GestureAction.fromValue(a.getInteger(R.styleable.CameraView_cameraGestureTap, GestureAction.DEFAULT_TAP.value()));
@@ -143,6 +144,7 @@ public class CameraView extends FrameLayout {
         setWhiteBalance(whiteBalance);
         setGrid(grid);
         setHdr(hdr);
+        setAudio(audio);
 
         // Apply gestures
         mapGesture(Gesture.TAP, tapGesture);
@@ -865,6 +867,28 @@ public class CameraView extends FrameLayout {
     }
 
 
+    /**
+     * Controls the audio
+     *
+     * @see Audio#OFF
+     * @see Audio#ON
+     *
+     * @param audio desired audio value
+     */
+    public void setAudio(Audio audio) {
+        mCameraController.setAudio(audio);
+    }
+
+
+    /**
+     * Gets the current audio value.
+     * @return the current audio value
+     */
+    public Audio getAudio() {
+        return mCameraController.getAudio();
+    }
+
+
     /**
      * Starts an autofocus process at the given coordinates, with respect
      * to the view width and height.

cameraview/src/main/options/com/otaliastudios/cameraview/Audio.java

@@ -0,0 +1,42 @@
+package com.otaliastudios.cameraview;
+
+
+/**
+ * Audio values indicate whether to record audio stream when record video.
+ *
+ * @see CameraView#setAudio(Audio)
+ */
+public enum Audio {
+
+    /**
+     * No Audio.
+     */
+    OFF(0),
+
+    /**
+     * With Audio.
+     */
+    ON(1);
+
+    final static Audio DEFAULT = ON;
+
+    private int value;
+
+    Audio(int value) {
+        this.value = value;
+    }
+
+    int value() {
+        return value;
+    }
+
+    static Audio fromValue(int value) {
+        Audio[] list = Audio.values();
+        for (Audio action : list) {
+            if (action.value() == value) {
+                return action;
+            }
+        }
+        return null;
+    }
+}

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

@@ -91,6 +91,11 @@
 
         <attr name="cameraCropOutput" format="boolean" />
 
+        <attr name="cameraAudio" format="enum">
+            <enum name="off" value="0" />
+            <enum name="on" value="1" />
+        </attr>
+
         <!-- deprecated attr name="cameraZoomMode" format="enum">
             <enum name="off" value="0" />
             <enum name="pinch" value="1" />

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

@@ -30,6 +30,7 @@
                 app:cameraCropOutput="false"
                 app:cameraFacing="back"
                 app:cameraFlash="off"
+                app:cameraAudio="on"
                 app:cameraGestureTap="focusWithMarker"
                 app:cameraGestureLongTap="none"
                 app:cameraGesturePinch="zoom"