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// Copyright 2015 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_BASE_ANDROID_MEDIA_CODEC_AUDIO_DECODER_H_
#define MEDIA_BASE_ANDROID_MEDIA_CODEC_AUDIO_DECODER_H_
#include <stddef.h>
#include <stdint.h>
#include "base/macros.h"
#include "media/base/android/media_codec_decoder.h"
namespace media {
class AudioTimestampHelper;
// Audio decoder for MediaCodecPlayer
class MediaCodecAudioDecoder : public MediaCodecDecoder {
public:
// For parameters see media_codec_decoder.h
// update_current_time_cb: callback that reports current playback time.
// Called for each rendered frame.
MediaCodecAudioDecoder(
const scoped_refptr<base::SingleThreadTaskRunner>& media_runner,
FrameStatistics* frame_statistics,
const base::Closure& request_data_cb,
const base::Closure& starvation_cb,
const base::Closure& decoder_drained_cb,
const base::Closure& stop_done_cb,
const base::Closure& waiting_for_decryption_key_cb,
const base::Closure& error_cb,
const SetTimeCallback& update_current_time_cb);
~MediaCodecAudioDecoder() override;
const char* class_name() const override;
bool HasStream() const override;
void SetDemuxerConfigs(const DemuxerConfigs& configs) override;
bool IsContentEncrypted() const override;
void ReleaseDecoderResources() override;
void Flush() override;
// Sets the volume of the audio output.
void SetVolume(double volume);
// Sets the base timestamp for |audio_timestamp_helper_|.
void SetBaseTimestamp(base::TimeDelta base_timestamp);
protected:
bool IsCodecReconfigureNeeded(const DemuxerConfigs& next) const override;
ConfigStatus ConfigureInternal(jobject media_crypto) override;
void OnOutputFormatChanged() override;
void Render(int buffer_index,
size_t offset,
size_t size,
RenderMode render_mode,
base::TimeDelta pts,
bool eos_encountered) override;
private:
// A helper method to set the volume.
void SetVolumeInternal();
// Recreates |audio_timestamp_helper_|, called when sampling rate is changed.
void ResetTimestampHelper();
// Data.
// Configuration received from demuxer
DemuxerConfigs configs_;
// Requested volume
double volume_;
// Number of bytes per audio frame. Depends on the output format and the
// number of channels.
int bytes_per_frame_;
// The sampling rate received from decoder.
int output_sampling_rate_;
// Frame count to sync with audio codec output.
int64_t frame_count_;
// Base timestamp for the |audio_timestamp_helper_|.
base::TimeDelta base_timestamp_;
// Object to calculate the current audio timestamp for A/V sync.
scoped_ptr<AudioTimestampHelper> audio_timestamp_helper_;
// Reports current playback time to the callee.
SetTimeCallback update_current_time_cb_;
// The time limit for the next frame to avoid underrun.
base::TimeTicks next_frame_time_limit_;
DISALLOW_COPY_AND_ASSIGN(MediaCodecAudioDecoder);
};
} // namespace media
#endif // MEDIA_BASE_ANDROID_MEDIA_CODEC_DECODER_H_
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