Like the VideoFrameStream, AudioBufferStream wraps a DemuxerStream and an AudioDecoder, providing AudioBuffers to its client.

This moves DemuxerStream reading logic out of all of the AudioDecoders.

AudioBufferStream is really just a typedef of DecoderStream<DemuxerStream::AUDIO>, just as VideoFrameStream is for DemuxerStream::VIDEO.

Review URL: https://codereview.chromium.org/141243003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@257500 0039d316-1c4b-4281-b951-d872f2087c98

• media/base/audio_decoder.cc[diff]
• media/base/audio_decoder.h[diff]
• media/base/mock_filters.h[diff]
• media/base/video_decoder.cc[diff]
• media/base/video_decoder.h[diff]
• media/filters/audio_decoder_selector_unittest.cc[diff]
• media/filters/audio_renderer_impl.cc[diff]
• media/filters/audio_renderer_impl.h[diff]
• media/filters/audio_renderer_impl_unittest.cc[diff]
• media/filters/decoder_selector.cc[diff]
• media/filters/decoder_selector.h[diff]
• media/filters/decoder_stream.cc[diff]
• media/filters/decoder_stream.h[diff]
• media/filters/decoder_stream_traits.cc[diff]
• media/filters/decoder_stream_traits.h[diff]
• media/filters/decrypting_audio_decoder.cc[diff]
• media/filters/decrypting_audio_decoder.h[diff]
• media/filters/decrypting_audio_decoder_unittest.cc[diff]
• media/filters/fake_video_decoder.cc[diff]
• media/filters/fake_video_decoder.h[diff]
• media/filters/fake_video_decoder_unittest.cc[diff]
• media/filters/ffmpeg_audio_decoder.cc[diff]
• media/filters/ffmpeg_audio_decoder.h[diff]
• media/filters/ffmpeg_audio_decoder_unittest.cc[diff]
• media/filters/opus_audio_decoder.cc[diff]
• media/filters/opus_audio_decoder.h[diff]
• media/filters/video_decoder_selector_unittest.cc[diff]
• media/filters/video_frame_stream_unittest.cc[diff]