Factor out AudioTrack from MediaCodecAudioTrackRenderer.

AudioTrack contains the portions of MediaCodecAudioTrackRenderer that handle the
platform AudioTrack instance, including synchronization (playback position
smoothing), non-blocking writes and releasing.

This refactoring should not affect the behavior of audio playback, and is in
preparation for adding an Ac3PassthroughAudioTrackRenderer that will use the
AudioTrack.

demo/src/main/java/com/google/android/exoplayer/demo/full/EventLogger.java

@@ -16,8 +16,8 @@
 package com.google.android.exoplayer.demo.full;
 
 import com.google.android.exoplayer.ExoPlayer;
-import com.google.android.exoplayer.MediaCodecAudioTrackRenderer.AudioTrackInitializationException;
 import com.google.android.exoplayer.MediaCodecTrackRenderer.DecoderInitializationException;
+import com.google.android.exoplayer.audio.AudioTrack;
 import com.google.android.exoplayer.demo.full.player.DemoPlayer;
 import com.google.android.exoplayer.util.VerboseLogUtil;
 
@@ -149,7 +149,7 @@ public class EventLogger implements DemoPlayer.Listener, DemoPlayer.InfoListener
   }
 
   @Override
-  public void onAudioTrackInitializationError(AudioTrackInitializationException e) {
+  public void onAudioTrackInitializationError(AudioTrack.InitializationException e) {
     printInternalError("audioTrackInitializationError", e);
   }
 

demo/src/main/java/com/google/android/exoplayer/demo/full/player/DemoPlayer.java

@@ -19,10 +19,10 @@ import com.google.android.exoplayer.DummyTrackRenderer;
 import com.google.android.exoplayer.ExoPlaybackException;
 import com.google.android.exoplayer.ExoPlayer;
 import com.google.android.exoplayer.MediaCodecAudioTrackRenderer;
-import com.google.android.exoplayer.MediaCodecAudioTrackRenderer.AudioTrackInitializationException;
 import com.google.android.exoplayer.MediaCodecTrackRenderer.DecoderInitializationException;
 import com.google.android.exoplayer.MediaCodecVideoTrackRenderer;
 import com.google.android.exoplayer.TrackRenderer;
+import com.google.android.exoplayer.audio.AudioTrack;
 import com.google.android.exoplayer.chunk.ChunkSampleSource;
 import com.google.android.exoplayer.chunk.MultiTrackChunkSource;
 import com.google.android.exoplayer.drm.StreamingDrmSessionManager;
@@ -106,7 +106,7 @@ public class DemoPlayer implements ExoPlayer.Listener, ChunkSampleSource.EventLi
    */
   public interface InternalErrorListener {
     void onRendererInitializationError(Exception e);
-    void onAudioTrackInitializationError(AudioTrackInitializationException e);
+    void onAudioTrackInitializationError(AudioTrack.InitializationException e);
     void onDecoderInitializationError(DecoderInitializationException e);
     void onCryptoError(CryptoException e);
     void onUpstreamError(int sourceId, IOException e);
@@ -424,7 +424,7 @@ public class DemoPlayer implements ExoPlayer.Listener, ChunkSampleSource.EventLi
   }
 
   @Override
-  public void onAudioTrackInitializationError(AudioTrackInitializationException e) {
+  public void onAudioTrackInitializationError(AudioTrack.InitializationException e) {
     if (internalErrorListener != null) {
       internalErrorListener.onAudioTrackInitializationError(e);
     }