Add MediaCodecAudioDecoder implementation

media/base/android/sdk_media_codec_bridge.h

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MEDIA_BASE_ANDROID_SDK_MEDIA_CODEC_BRIDGE_H_
 #define MEDIA_BASE_ANDROID_SDK_MEDIA_CODEC_BRIDGE_H_
 
 #include <jni.h>
 #include <stddef.h>
 #include <stdint.h>
@@ skipping 86 matching lines @@
 // MediaCodecBridge.
 class MEDIA_EXPORT AudioCodecBridge : public SdkMediaCodecBridge {
  public:
   // Returns an AudioCodecBridge instance if |codec| is supported, or a NULL
   // pointer otherwise.
   static AudioCodecBridge* Create(const AudioCodec& codec);
 
   // 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,
                          const uint8_t* extra_data,
                          size_t extra_data_size,
                          int64_t codec_delay_ns,
                          int64_t seek_preroll_ns,
                          bool play_audio,
                          jobject media_crypto) WARN_UNUSED_RESULT;
 
@@ skipping 72 matching lines @@
   VideoCodecBridge(const std::string& mime,
                    bool is_secure,
                    MediaCodecDirection direction);
 
   int adaptive_playback_supported_for_testing_;
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_ANDROID_SDK_MEDIA_CODEC_BRIDGE_H_