Use passthrough decoder for (E)AC3 formats

media/filters/android/media_codec_audio_decoder.h

 // Copyright 2016 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_FILTERS_ANDROID_MEDIA_CODEC_AUDIO_DECODER_H_
 #define MEDIA_FILTERS_ANDROID_MEDIA_CODEC_AUDIO_DECODER_H_
 
 #include <deque>
 #include <memory>
 #include <utility>
@@ skipping 150 matching lines @@
   // The queue of encoded (and maybe encrypted) buffers. The MediaCodec might
   // not be able to accept the input at the time of Decode(), thus all
   // DecoderBuffers first go to |input_queue_|.
   using BufferCBPair = std::pair<scoped_refptr<DecoderBuffer>, DecodeCB>;
   using InputQueue = std::deque<BufferCBPair>;
   InputQueue input_queue_;
 
   // Cached decoder config.
   AudioDecoderConfig config_;
 
+  // Indication to use passthrough decoder or not.
+  bool is_passthrough_;
+
+  // The audio sample format of the audio decoder output.
+  SampleFormat sample_format_;
+
   // Actual channel count that comes from decoder may be different than config.
   int channel_count_;
   ChannelLayout channel_layout_;
 
   // Actual sample rate that comes from the decoder, may be different than
   // config.
   int sample_rate_;
 
   // Callback that delivers output frames.
   OutputCB output_cb_;
@@ skipping 20 matching lines @@
   media::MediaDrmBridgeCdmContext::JavaObjectPtr media_crypto_;
 
   base::WeakPtrFactory<MediaCodecAudioDecoder> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaCodecAudioDecoder);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_ANDROID_MEDIA_CODEC_AUDIO_DECODER_H_