1 // Copyright 2013 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 #include "media/base/android/audio_decoder_job.h"
8 #include "base/lazy_instance.h"
9 #include "base/threading/thread.h"
10 #include "media/base/android/media_codec_bridge.h"
11 #include "media/base/audio_timestamp_helper.h"
15 // Use 16bit PCM for audio output. Keep this value in sync with the output
16 // format we passed to AudioTrack in MediaCodecBridge.
17 const int kBytesPerAudioOutputSample = 2;
22 class AudioDecoderThread : public base::Thread {
24 AudioDecoderThread() : base::Thread("MediaSource_AudioDecoderThread") {
29 // TODO(qinmin): Check if it is tolerable to use worker pool to handle all the
30 // decoding tasks so that we don't need a global thread here.
31 // http://crbug.com/245750
32 base::LazyInstance<AudioDecoderThread>::Leaky
33 g_audio_decoder_thread = LAZY_INSTANCE_INITIALIZER;
35 AudioDecoderJob::AudioDecoderJob(
36 const base::Closure& request_data_cb,
37 const base::Closure& on_demuxer_config_changed_cb)
38 : MediaDecoderJob(g_audio_decoder_thread.Pointer()->message_loop_proxy(),
40 on_demuxer_config_changed_cb),
41 audio_codec_(kUnknownAudioCodec),
48 AudioDecoderJob::~AudioDecoderJob() {}
50 bool AudioDecoderJob::HasStream() const {
51 return audio_codec_ != kUnknownAudioCodec;
54 void AudioDecoderJob::SetVolume(double volume) {
59 void AudioDecoderJob::SetBaseTimestamp(base::TimeDelta base_timestamp) {
60 DCHECK(!is_decoding());
61 base_timestamp_ = base_timestamp;
62 if (audio_timestamp_helper_)
63 audio_timestamp_helper_->SetBaseTimestamp(base_timestamp_);
66 void AudioDecoderJob::ReleaseOutputBuffer(
67 int output_buffer_index,
70 base::TimeDelta current_presentation_timestamp,
71 const ReleaseOutputCompletionCallback& callback) {
72 render_output = render_output && (size != 0u);
74 int64 head_position = (static_cast<AudioCodecBridge*>(
75 media_codec_bridge_.get()))->PlayOutputBuffer(
76 output_buffer_index, size);
77 audio_timestamp_helper_->AddFrames(size / bytes_per_frame_);
78 int64 frames_to_play =
79 audio_timestamp_helper_->frame_count() - head_position;
80 DCHECK_GE(frames_to_play, 0);
81 current_presentation_timestamp =
82 audio_timestamp_helper_->GetTimestamp() -
83 audio_timestamp_helper_->GetFrameDuration(frames_to_play);
85 current_presentation_timestamp = kNoTimestamp();
87 media_codec_bridge_->ReleaseOutputBuffer(output_buffer_index, false);
89 callback.Run(current_presentation_timestamp,
90 audio_timestamp_helper_->GetTimestamp());
93 bool AudioDecoderJob::ComputeTimeToRender() const {
97 void AudioDecoderJob::UpdateDemuxerConfigs(const DemuxerConfigs& configs) {
98 // TODO(qinmin): split DemuxerConfig for audio and video separately so we
99 // can simply store the stucture here.
100 audio_codec_ = configs.audio_codec;
101 num_channels_ = configs.audio_channels;
102 sampling_rate_ = configs.audio_sampling_rate;
103 set_is_content_encrypted(configs.is_audio_encrypted);
104 audio_extra_data_ = configs.audio_extra_data;
105 bytes_per_frame_ = kBytesPerAudioOutputSample * num_channels_;
108 bool AudioDecoderJob::AreDemuxerConfigsChanged(
109 const DemuxerConfigs& configs) const {
110 return audio_codec_ != configs.audio_codec ||
111 num_channels_ != configs.audio_channels ||
112 sampling_rate_ != configs.audio_sampling_rate ||
113 is_content_encrypted() != configs.is_audio_encrypted ||
114 audio_extra_data_.size() != configs.audio_extra_data.size() ||
115 !std::equal(audio_extra_data_.begin(),
116 audio_extra_data_.end(),
117 configs.audio_extra_data.begin());
120 bool AudioDecoderJob::CreateMediaCodecBridgeInternal() {
121 media_codec_bridge_.reset(AudioCodecBridge::Create(audio_codec_));
122 if (!media_codec_bridge_)
125 if (!(static_cast<AudioCodecBridge*>(media_codec_bridge_.get()))->Start(
126 audio_codec_, sampling_rate_, num_channels_, &audio_extra_data_[0],
127 audio_extra_data_.size(), true, GetMediaCrypto().obj())) {
128 media_codec_bridge_.reset();
134 // Need to pass the base timestamp to the new decoder.
135 if (audio_timestamp_helper_)
136 base_timestamp_ = audio_timestamp_helper_->GetTimestamp();
137 audio_timestamp_helper_.reset(new AudioTimestampHelper(sampling_rate_));
138 audio_timestamp_helper_->SetBaseTimestamp(base_timestamp_);
142 void AudioDecoderJob::SetVolumeInternal() {
143 if (media_codec_bridge_) {
144 static_cast<AudioCodecBridge*>(media_codec_bridge_.get())->SetVolume(