Cast: Stop logging kVideoFrameSentToEncoder and rename a couple events.
[chromium-blink-merge.git] / media / filters / ffmpeg_audio_decoder.h
blobea3bc4659562d0d8ce718d73a0559a1855d6119f
1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #ifndef MEDIA_FILTERS_FFMPEG_AUDIO_DECODER_H_
6 #define MEDIA_FILTERS_FFMPEG_AUDIO_DECODER_H_
8 #include <list>
10 #include "base/callback.h"
11 #include "base/memory/scoped_ptr.h"
12 #include "base/time/time.h"
13 #include "media/base/audio_decoder.h"
14 #include "media/base/demuxer_stream.h"
15 #include "media/base/sample_format.h"
16 #include "media/ffmpeg/ffmpeg_deleters.h"
18 struct AVCodecContext;
19 struct AVFrame;
21 namespace base {
22 class SingleThreadTaskRunner;
25 namespace media {
27 class AudioDiscardHelper;
28 class DecoderBuffer;
30 class MEDIA_EXPORT FFmpegAudioDecoder : public AudioDecoder {
31 public:
32 explicit FFmpegAudioDecoder(
33 const scoped_refptr<base::SingleThreadTaskRunner>& task_runner);
34 virtual ~FFmpegAudioDecoder();
36 // AudioDecoder implementation.
37 virtual void Initialize(const AudioDecoderConfig& config,
38 const PipelineStatusCB& status_cb) OVERRIDE;
39 virtual void Decode(const scoped_refptr<DecoderBuffer>& buffer,
40 const DecodeCB& decode_cb) OVERRIDE;
41 virtual scoped_refptr<AudioBuffer> GetDecodeOutput() OVERRIDE;
42 virtual void Reset(const base::Closure& closure) OVERRIDE;
43 virtual void Stop() OVERRIDE;
45 private:
46 enum DecoderState {
47 kUninitialized,
48 kNormal,
49 kFlushCodec,
50 kDecodeFinished,
51 kError
54 // Reset decoder and call |reset_cb_|.
55 void DoReset();
57 // Handles decoding an unencrypted encoded buffer.
58 void DecodeBuffer(const scoped_refptr<DecoderBuffer>& buffer,
59 const DecodeCB& decode_cb);
60 bool FFmpegDecode(const scoped_refptr<DecoderBuffer>& buffer);
62 // Handles (re-)initializing the decoder with a (new) config.
63 // Returns true if initialization was successful.
64 bool ConfigureDecoder();
66 // Releases resources associated with |codec_context_| and |av_frame_|
67 // and resets them to NULL.
68 void ReleaseFFmpegResources();
69 void ResetTimestampState();
71 scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
73 DecoderState state_;
75 // FFmpeg structures owned by this object.
76 scoped_ptr<AVCodecContext, ScopedPtrAVFreeContext> codec_context_;
77 scoped_ptr<AVFrame, ScopedPtrAVFreeFrame> av_frame_;
79 AudioDecoderConfig config_;
81 // AVSampleFormat initially requested; not Chrome's SampleFormat.
82 int av_sample_format_;
84 scoped_ptr<AudioDiscardHelper> discard_helper_;
86 // Since multiple frames may be decoded from the same packet we need to queue
87 // them up.
88 std::list<scoped_refptr<AudioBuffer> > queued_audio_;
90 DISALLOW_IMPLICIT_CONSTRUCTORS(FFmpegAudioDecoder);
93 } // namespace media
95 #endif // MEDIA_FILTERS_FFMPEG_AUDIO_DECODER_H_