Move media::AudioCodec to its own source file

media/filters/ffmpeg_audio_decoder.h

 // Copyright (c) 2012 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_FFMPEG_AUDIO_DECODER_H_
 #define MEDIA_FILTERS_FFMPEG_AUDIO_DECODER_H_
 
 #include <list>
 
 #include "base/callback.h"
@@ skipping 13 matching lines @@
 class SingleThreadTaskRunner;
 }
 
 namespace media {
 
 class AudioDiscardHelper;
 class DecoderBuffer;
 
 class MEDIA_EXPORT FFmpegAudioDecoder : public AudioDecoder {
  public:
+  static bool IsCodecSupported(AudioCodec codec, SampleFormat sample_format);

[jrummell, 2016/02/11 22:23:19]

I know that this matches what is in FFmpegVideoDecoder, but there are no callers
for it. Is this necessary? Do you have an upcoming need for it?

[DaleCurtis, 2016/02/11 22:26:42]

Yeah, I think callers should just invoke the ffmpeg method directly instead of
exposing this.

+
   FFmpegAudioDecoder(
       const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
       const scoped_refptr<MediaLog>& media_log);
   ~FFmpegAudioDecoder() override;
 
   // AudioDecoder implementation.
   std::string GetDisplayName() const override;
   void Initialize(const AudioDecoderConfig& config,
                   CdmContext* cdm_context,
                   const InitCB& init_cb,
@@ skipping 66 matching lines @@
   scoped_ptr<AudioDiscardHelper> discard_helper_;
 
   scoped_refptr<MediaLog> media_log_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(FFmpegAudioDecoder);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_FFMPEG_AUDIO_DECODER_H_