blob: 4db8a53abbc05f3fccb3c2842d424338f8fd67f5 [file] [log] [blame]
// 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_OPUS_AUDIO_DECODER_H_
#define MEDIA_FILTERS_OPUS_AUDIO_DECODER_H_
#include "base/callback.h"
#include "media/base/audio_decoder.h"
#include "media/base/demuxer_stream.h"
struct OpusMSDecoder;
namespace base {
class MessageLoopProxy;
}
namespace media {
class AudioTimestampHelper;
class DataBuffer;
class DecoderBuffer;
struct QueuedAudioBuffer;
class MEDIA_EXPORT OpusAudioDecoder : public AudioDecoder {
public:
explicit OpusAudioDecoder(
const scoped_refptr<base::MessageLoopProxy>& message_loop);
// AudioDecoder implementation.
virtual void Initialize(const scoped_refptr<DemuxerStream>& stream,
const PipelineStatusCB& status_cb,
const StatisticsCB& statistics_cb) OVERRIDE;
virtual void Read(const ReadCB& read_cb) OVERRIDE;
virtual int bits_per_channel() OVERRIDE;
virtual ChannelLayout channel_layout() OVERRIDE;
virtual int samples_per_second() OVERRIDE;
virtual void Reset(const base::Closure& closure) OVERRIDE;
protected:
virtual ~OpusAudioDecoder();
private:
// Methods running on decoder thread.
void DoInitialize(const scoped_refptr<DemuxerStream>& stream,
const PipelineStatusCB& status_cb,
const StatisticsCB& statistics_cb);
void DoReset(const base::Closure& closure);
void DoRead(const ReadCB& read_cb);
void DoDecodeBuffer(DemuxerStream::Status status,
const scoped_refptr<DecoderBuffer>& input);
// Reads from the demuxer stream with corresponding callback method.
void ReadFromDemuxerStream();
bool ConfigureDecoder();
void CloseDecoder();
void ResetTimestampState();
bool Decode(const scoped_refptr<DecoderBuffer>& input,
bool skip_eos_append,
scoped_refptr<DataBuffer>* output_buffer);
scoped_refptr<base::MessageLoopProxy> message_loop_;
scoped_refptr<DemuxerStream> demuxer_stream_;
StatisticsCB statistics_cb_;
OpusMSDecoder* opus_decoder_;
// Decoded audio format.
int bits_per_channel_;
ChannelLayout channel_layout_;
int samples_per_second_;
// Used for computing output timestamps.
scoped_ptr<AudioTimestampHelper> output_timestamp_helper_;
base::TimeDelta last_input_timestamp_;
// Number of output sample bytes to drop before generating
// output buffers.
int output_bytes_to_drop_;
ReadCB read_cb_;
int skip_samples_;
// Buffer for output from libopus.
scoped_array<int16> output_buffer_;
DISALLOW_IMPLICIT_CONSTRUCTORS(OpusAudioDecoder);
};
} // namespace media
#endif // MEDIA_FILTERS_OPUS_AUDIO_DECODER_H_