Add thread annotations

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

@@ -10,20 +10,20 @@ import org.junit.runner.RunWith;
 
 @RunWith(AndroidJUnit4.class)
 @SmallTest
-public class GLCameraPreviewTest extends CameraPreviewTest {
+public class GlCameraPreviewTest extends CameraPreviewTest {
 
     @Override
     protected CameraPreview createPreview(Context context, ViewGroup parent, CameraPreview.SurfaceCallback callback) {
-        return new GLCameraPreview(context, parent, callback);
+        return new GlCameraPreview(context, parent, callback);
     }
 
     @Override
     protected float getCropScaleY() {
-        return 1F / ((GLCameraPreview) preview).mScaleY;
+        return 1F / ((GlCameraPreview) preview).mScaleY;
     }
 
     @Override
     protected float getCropScaleX() {
-        return 1F / ((GLCameraPreview) preview).mScaleX;
+        return 1F / ((GlCameraPreview) preview).mScaleX;
     }
 }

cameraview/src/main/gles/com/otaliastudios/cameraview/AudioMediaEncoder.java

@@ -17,26 +17,31 @@ class AudioMediaEncoder extends MediaEncoder {
 
     }
 
+    @EncoderThread
     @Override
     void prepare(MediaEncoderEngine.Controller controller) {
         super.prepare(controller);
     }
 
+    @EncoderThread
     @Override
     void start() {
 
     }
 
+    @EncoderThread
     @Override
     void notify(String event, Object data) {
 
     }
 
+    @EncoderThread
     @Override
     void stop() {
 
     }
 
+    @EncoderThread
     @Override
     void release() {
 

cameraview/src/main/gles/com/otaliastudios/cameraview/MediaEncoder.java

@@ -21,17 +21,22 @@ abstract class MediaEncoder {
     private MediaEncoderEngine.Controller mController;
     private int mTrackIndex;
 
+    @EncoderThread
     void prepare(MediaEncoderEngine.Controller controller) {
         mController = controller;
         mBufferInfo = new MediaCodec.BufferInfo();
     }
 
+    @EncoderThread
     abstract void start();
 
+    @EncoderThread
     abstract void notify(String event, Object data);
 
+    @EncoderThread
     abstract void stop();
 
+    @EncoderThread
     abstract void release();
 
     /**

cameraview/src/main/gles/com/otaliastudios/cameraview/MediaEncoderEngine.java

@@ -15,6 +15,8 @@ import java.nio.ByteBuffer;
 import java.util.ArrayList;
 import java.util.List;
 
+@interface EncoderThread {}
+
 @RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN_MR2)
 class MediaEncoderEngine {
 
@@ -60,6 +62,7 @@ class MediaEncoderEngine {
             mMediaMuxerStartCount++;
             if (mMediaMuxerStartCount == mEncoders.size()) {
                 mMediaMuxer.start();
+                mMediaMuxerStarted = true;
             }
             return track;
         }
@@ -110,9 +113,11 @@ class MediaEncoderEngine {
                     encoder.release();
                 }
                 if (mMediaMuxer != null) {
-                    // TODO: stop() throws an exception if you haven't fed it any data.  Keep track
-                    //       of frames submitted, and don't call stop() if we haven't written anything.
+                    // stop() throws an exception if you haven't fed it any data.
+                    // We can just swallow I think.
+                    try {
                         mMediaMuxer.stop();
+                    } catch (Exception e) {};
                     mMediaMuxer.release();
                     mMediaMuxer = null;
                 }

cameraview/src/main/gles/com/otaliastudios/cameraview/OldMediaEncoder.java

@@ -327,7 +327,7 @@ class OldMediaEncoder implements Runnable {
                     long timestamp = (((long) inputMessage.arg1) << 32) | (((long) inputMessage.arg2) & 0xffffffffL);
                     float[] transform = (float[]) obj;
 
-                    // We must scale this matrix like GLCameraPreview does, because it might have some cropping.
+                    // We must scale this matrix like GlCameraPreview does, because it might have some cropping.
                     // Scaling takes place with respect to the (0, 0, 0) point, so we must apply a Translation to compensate.
 
                     float scaleX = encoder.mTransformationScaleX;
@@ -337,7 +337,7 @@ class OldMediaEncoder implements Runnable {
                     Matrix.translateM(transform, 0, scaleTranslX, scaleTranslY, 0);
                     Matrix.scaleM(transform, 0, scaleX, scaleY, 1);
 
-                    // We also must rotate this matrix. In GLCameraPreview it is not needed because it is a live
+                    // We also must rotate this matrix. In GlCameraPreview it is not needed because it is a live
                     // stream, but the output video, must be correctly rotated based on the device rotation at the moment.
                     // Rotation also takes place with respect to the origin (the Z axis), so we must
                     // translate to origin, rotate, then back to where we were.

cameraview/src/main/gles/com/otaliastudios/cameraview/TextureMediaEncoder.java

@@ -48,6 +48,7 @@ class TextureMediaEncoder extends VideoMediaEncoder<TextureMediaEncoder.Config>
         super(config);
     }
 
+    @EncoderThread
     @Override
     void prepare(MediaEncoderEngine.Controller controller) {
         super.prepare(controller);
@@ -58,6 +59,7 @@ class TextureMediaEncoder extends VideoMediaEncoder<TextureMediaEncoder.Config>
         mViewport = new EglViewport();
     }
 
+    @EncoderThread
     @Override
     void release() {
         super.release();
@@ -75,12 +77,14 @@ class TextureMediaEncoder extends VideoMediaEncoder<TextureMediaEncoder.Config>
         }
     }
 
+    @EncoderThread
     @Override
     void start() {
         super.start();
         // Nothing to do here. Waiting for the first frame.
     }
 
+    @EncoderThread
     @Override
     void notify(String event, Object data) {
         if (event.equals(FRAME_EVENT)) {
@@ -99,7 +103,7 @@ class TextureMediaEncoder extends VideoMediaEncoder<TextureMediaEncoder.Config>
             long timestamp = (((long) arg1) << 32) | (((long) arg2) & 0xffffffffL);
             float[] transform = frame.transform;
 
-            // We must scale this matrix like GLCameraPreview does, because it might have some cropping.
+            // We must scale this matrix like GlCameraPreview does, because it might have some cropping.
             // Scaling takes place with respect to the (0, 0, 0) point, so we must apply a Translation to compensate.
 
             float scaleX = mConfig.scaleX;
@@ -109,7 +113,7 @@ class TextureMediaEncoder extends VideoMediaEncoder<TextureMediaEncoder.Config>
             Matrix.translateM(transform, 0, scaleTranslX, scaleTranslY, 0);
             Matrix.scaleM(transform, 0, scaleX, scaleY, 1);
 
-            // We also must rotate this matrix. In GLCameraPreview it is not needed because it is a live
+            // We also must rotate this matrix. In GlCameraPreview it is not needed because it is a live
             // stream, but the output video, must be correctly rotated based on the device rotation at the moment.
             // Rotation also takes place with respect to the origin (the Z axis), so we must
             // translate to origin, rotate, then back to where we were.

cameraview/src/main/gles/com/otaliastudios/cameraview/VideoMediaEncoder.java

@@ -13,6 +13,11 @@ import android.view.Surface;
 import java.io.IOException;
 import java.nio.ByteBuffer;
 
+/**
+ * This alone does nothing.
+ * Subclasses must make sure they write each frame onto the given Surface {@link #mSurface}.
+ * @param <C> the config object.
+ */
 @RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN_MR2)
 abstract class VideoMediaEncoder<C extends VideoMediaEncoder.Config> extends MediaEncoder {
 
@@ -42,6 +47,7 @@ abstract class VideoMediaEncoder<C extends VideoMediaEncoder.Config> extends Med
         mConfig = config;
     }
 
+    @EncoderThread
     @Override
     void prepare(MediaEncoderEngine.Controller controller) {
         super.prepare(controller);
@@ -67,18 +73,21 @@ abstract class VideoMediaEncoder<C extends VideoMediaEncoder.Config> extends Med
         mMediaCodec.start();
     }
 
+    @EncoderThread
     @Override
     void start() {
         // Nothing to do here. Waiting for the first frame.
         mFrameNum = 0;
     }
 
+    @EncoderThread
     @Override
     void stop() {
         mFrameNum = -1;
         drain(true);
     }
 
+    @EncoderThread
     @Override
     void release() {
         if (mMediaCodec != null) {

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

@@ -6,18 +6,14 @@ import android.graphics.ImageFormat;
 import android.graphics.PointF;
 import android.graphics.Rect;
 import android.graphics.SurfaceTexture;
-import android.graphics.YuvImage;
 import android.hardware.Camera;
 import android.location.Location;
 import android.os.Build;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
 import android.support.annotation.WorkerThread;
-import android.support.media.ExifInterface;
 import android.view.SurfaceHolder;
 
-import java.io.ByteArrayInputStream;
-import java.io.ByteArrayOutputStream;
 import java.io.File;
 import java.io.IOException;
 import java.util.ArrayList;
@@ -645,8 +641,8 @@ class Camera1 extends CameraController implements Camera.PreviewCallback, Camera
     @SuppressLint("NewApi")
     @Override
     void takeVideoSnapshot(@NonNull final File file) {
-        if (!(mPreview instanceof GLCameraPreview)) {
-            throw new IllegalStateException("Video snapshots are only supported with GLCameraPreview.");
+        if (!(mPreview instanceof GlCameraPreview)) {
+            throw new IllegalStateException("Video snapshots are only supported with GlCameraPreview.");
         }
         if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN_MR2) {
             throw new IllegalStateException("Video snapshots are only supported starting from API 18.");
@@ -663,7 +659,7 @@ class Camera1 extends CameraController implements Camera.PreviewCallback, Camera
                 videoResult.codec = mVideoCodec;
                 videoResult.location = mLocation;
 
-                // What matters as size here is the preview size, which is passed to the GLCameraPreview
+                // What matters as size here is the preview size, which is passed to the GlCameraPreview
                 // surface texture, which is then passed to the encoder. The view size has no influence.
 
                 // CROPPING: We must make sure that the encoder applies our special transformation
@@ -700,7 +696,7 @@ class Camera1 extends CameraController implements Camera.PreviewCallback, Camera
                 videoResult.maxSize = mVideoMaxSize;
                 videoResult.maxDuration = mVideoMaxDuration;
 
-                GLCameraPreview cameraPreview = (GLCameraPreview) mPreview;
+                GlCameraPreview cameraPreview = (GlCameraPreview) mPreview;
                 mVideoRecorder = new SnapshotVideoRecorder(videoResult, Camera1.this, cameraPreview);
                 mVideoRecorder.start();
             }

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

@@ -7,7 +7,6 @@ import android.app.Activity;
 import android.arch.lifecycle.Lifecycle;
 import android.arch.lifecycle.LifecycleObserver;
 import android.arch.lifecycle.LifecycleOwner;
-import android.arch.lifecycle.Lifecycling;
 import android.arch.lifecycle.OnLifecycleEvent;
 import android.content.Context;
 import android.content.ContextWrapper;
@@ -240,7 +239,7 @@ public class CameraView extends FrameLayout implements LifecycleObserver {
                 }
             }
             case GL_SURFACE: default: {
-                return new GLCameraPreview(context, container, null);
+                return new GlCameraPreview(context, container, null);
             }
         }
     }

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

@@ -1,7 +1,6 @@
 package com.otaliastudios.cameraview;
 
 import android.annotation.SuppressLint;
-import android.graphics.Bitmap;
 import android.graphics.ImageFormat;
 import android.graphics.Rect;
 import android.graphics.SurfaceTexture;
@@ -9,19 +8,9 @@ import android.graphics.YuvImage;
 import android.hardware.Camera;
 import android.opengl.EGL14;
 import android.opengl.EGLContext;
-import android.opengl.EGLDisplay;
-import android.opengl.EGLSurface;
-import android.opengl.GLES11Ext;
-import android.opengl.GLES20;
-import android.opengl.GLSurfaceView;
 import android.opengl.Matrix;
-import android.view.Surface;
-import android.view.SurfaceHolder;
-import android.view.SurfaceView;
 
 import java.io.ByteArrayOutputStream;
-import java.nio.ByteBuffer;
-import java.nio.ByteOrder;
 
 /**
  * A {@link PictureResult} that uses standard APIs.
@@ -50,21 +39,22 @@ class SnapshotPictureRecorder extends PictureRecorder {
 
     @Override
     void take() {
-        if (mPreview instanceof GLCameraPreview) {
-            takeGl((GLCameraPreview) mPreview);
+        if (mPreview instanceof GlCameraPreview) {
+            takeGl((GlCameraPreview) mPreview);
         } else {
             takeLegacy();
         }
     }
 
     @SuppressLint("NewApi")
-    private void takeGl(final GLCameraPreview preview) {
-        preview.addRendererFrameCallback(new GLCameraPreview.RendererFrameCallback() {
+    private void takeGl(final GlCameraPreview preview) {
+        preview.addRendererFrameCallback(new GlCameraPreview.RendererFrameCallback() {
 
             int mTextureId;
             SurfaceTexture mSurfaceTexture;
             float[] mTransform;
 
+            @RendererThread
             public void onRendererTextureCreated(int textureId) {
                 mTextureId = textureId;
                 mSurfaceTexture = new SurfaceTexture(mTextureId, true);
@@ -75,6 +65,7 @@ class SnapshotPictureRecorder extends PictureRecorder {
                 mTransform = new float[16];
             }
 
+            @RendererThread
             @Override
             public void onRendererFrame(SurfaceTexture surfaceTexture, final float scaleX, final float scaleY) {
                 preview.removeRendererFrameCallback(this);

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

@@ -14,7 +14,7 @@ import android.support.annotation.RequiresApi;
  * TODO when cropping is huge, the first frame of the video result, noticeably, has no transformation applied. Don't know why.
  */
 @RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN_MR2)
-class SnapshotVideoRecorder extends VideoRecorder implements GLCameraPreview.RendererFrameCallback {
+class SnapshotVideoRecorder extends VideoRecorder implements GlCameraPreview.RendererFrameCallback {
 
     private static final String TAG = SnapshotVideoRecorder.class.getSimpleName();
     private static final CameraLogger LOG = CameraLogger.create(TAG);
@@ -25,13 +25,13 @@ class SnapshotVideoRecorder extends VideoRecorder implements GLCameraPreview.Ren
 
     private OldMediaEncoder mEncoder;
     private MediaEncoderEngine mEncoderEngine;
-    private GLCameraPreview mPreview;
+    private GlCameraPreview mPreview;
 
     private int mCurrentState = STATE_NOT_RECORDING;
     private int mDesiredState = STATE_NOT_RECORDING;
     private int mTextureId = 0;
 
-    SnapshotVideoRecorder(VideoResult stub, VideoResultListener listener, GLCameraPreview preview) {
+    SnapshotVideoRecorder(VideoResult stub, VideoResultListener listener, GlCameraPreview preview) {
         super(stub, listener);
         if (USE_OLD_ENCODER) {
             mEncoder = new OldMediaEncoder();
@@ -60,11 +60,13 @@ class SnapshotVideoRecorder extends VideoRecorder implements GLCameraPreview.Ren
         mDesiredState = STATE_NOT_RECORDING;
     }
 
+    @RendererThread
     @Override
     public void onRendererTextureCreated(int textureId) {
         mTextureId = textureId;
     }
 
+    @RendererThread
     @Override
     public void onRendererFrame(SurfaceTexture surfaceTexture, float scaleX, float scaleY) {
         if (mCurrentState == STATE_NOT_RECORDING && mDesiredState == STATE_RECORDING) {

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

@@ -21,6 +21,9 @@ import javax.microedition.khronos.egl.EGLDisplay;
 import javax.microedition.khronos.egl.EGLSurface;
 import javax.microedition.khronos.opengles.GL10;
 
+
+@interface RendererThread {}
+
 /**
  * - The android camera will stream image to the given {@link SurfaceTexture}.
  *
@@ -53,7 +56,7 @@ import javax.microedition.khronos.opengles.GL10;
  * Callbacks are guaranteed to be called on the renderer thread, which means that we can fetch
  * the GL context that was created and is managed by the {@link GLSurfaceView}.
  */
-class GLCameraPreview extends CameraPreview<GLSurfaceView, SurfaceTexture> implements GLSurfaceView.Renderer {
+class GlCameraPreview extends CameraPreview<GLSurfaceView, SurfaceTexture> implements GLSurfaceView.Renderer {
 
     private boolean mDispatched;
     private final float[] mTransformMatrix = new float[16];
@@ -64,7 +67,7 @@ class GLCameraPreview extends CameraPreview<GLSurfaceView, SurfaceTexture> imple
     /* for tests */ float mScaleX = 1F;
     /* for tests */ float mScaleY = 1F;
 
-    GLCameraPreview(Context context, ViewGroup parent, SurfaceCallback callback) {
+    GlCameraPreview(Context context, ViewGroup parent, SurfaceCallback callback) {
         super(context, parent, callback);
     }
 
@@ -119,7 +122,7 @@ class GLCameraPreview extends CameraPreview<GLSurfaceView, SurfaceTexture> imple
         }
     }
 
-    // Renderer thread
+    @RendererThread
     @Override
     public void onSurfaceCreated(GL10 gl, EGLConfig config) {
         mOutputViewport = new EglViewport();
@@ -144,7 +147,7 @@ class GLCameraPreview extends CameraPreview<GLSurfaceView, SurfaceTexture> imple
         });
     }
 
-    // Renderer thread
+    @RendererThread
     @SuppressWarnings("StatementWithEmptyBody")
     @Override
     public void onSurfaceChanged(GL10 gl, final int width, final int height) {
@@ -170,7 +173,7 @@ class GLCameraPreview extends CameraPreview<GLSurfaceView, SurfaceTexture> imple
         }
     }
 
-    // Renderer thread
+    @RendererThread
     @Override
     public void onDrawFrame(GL10 gl) {
         // Latch the latest frame.  If there isn't anything new,
@@ -255,6 +258,7 @@ class GLCameraPreview extends CameraPreview<GLSurfaceView, SurfaceTexture> imple
          *
          * @param textureId the GL texture linked to the image stream
          */
+        @RendererThread
         void onRendererTextureCreated(int textureId);
 
         /**
@@ -266,6 +270,7 @@ class GLCameraPreview extends CameraPreview<GLSurfaceView, SurfaceTexture> imple
          * @param scaleX the scaleX (in REF_VIEW) value
          * @param scaleY the scaleY (in REF_VIEW) value
          */
+        @RendererThread
         void onRendererFrame(SurfaceTexture surfaceTexture, float scaleX, float scaleY);
     }