Add MediaCodecAudioDecoder implementation

media/base/android/sdk_media_codec_bridge.h

Index: media/base/android/sdk_media_codec_bridge.h
diff --git a/media/base/android/sdk_media_codec_bridge.h b/media/base/android/sdk_media_codec_bridge.h
index 19ee9849e7f8d2d60c0c9f59fe2d7852fd498e50..84f12182ec7afdc779aaa6e4aade97fd1d1fed1a 100644
--- a/media/base/android/sdk_media_codec_bridge.h
+++ b/media/base/android/sdk_media_codec_bridge.h
@@ -104,7 +104,15 @@ class MEDIA_EXPORT AudioCodecBridge : public SdkMediaCodecBridge {
   // See MediaCodecUtil::IsKnownUnaccelerated().
   static bool IsKnownUnaccelerated(const AudioCodec& codec);
 
-  // Start the audio codec bridge.
+  // Start the audio codec bridge. If |play_audio| is true this method creates
+  // Android AudioTrack object for the actual audio playback
+  // (http://developer.android.com/reference/android/media/AudioTrack.html).
+  bool ConfigureAndStart(const AudioDecoderConfig& config,
+                         bool play_audio,
+                         jobject media_crypto);
+
+  // An overloaded variant used by AudioDecoderJob and AudioMediaCodecDecoder.
+  // We might want to remove this method when these classes go away.

[qinmin, 2016/02/16 19:25:09]

can we remove this method? We can pack in all the params inside
AudioDecoderConfig, just need to change AudioDecoderJob and
AudioMediaCodecDecoder

[Tima Vaisburd, 2016/02/16 21:23:26]

One way to do this would be to make a method that converts DemuxerConfigs into
AudioDecoderConfig, and make AudioDecoderJob keep DemuxerConfigs as a member.
May I do this in a separate CL? I've included TODO.

   bool ConfigureAndStart(const AudioCodec& codec,
                          int sample_rate,
                          int channel_count,