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// Copyright 2017 The Cobalt Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "starboard/android/shared/audio_decoder.h"
#include "starboard/android/shared/jni_env_ext.h"
#include "starboard/android/shared/jni_utils.h"
#include "starboard/android/shared/media_common.h"
#include "starboard/audio_sink.h"
#include "starboard/common/log.h"
#include "starboard/memory.h"
// Can be locally set to |1| for verbose audio decoding. Verbose audio
// decoding will log the following transitions that take place for each audio
// unit:
// T1: Our client passes an |InputBuffer| of audio data into us.
// T2: We receive a corresponding media codec output buffer back from our
// |MediaCodecBridge|.
// T3: Our client reads a corresponding |DecodedAudio| out of us.
//
// Example usage for debugging audio playback:
// $ adb logcat -c
// $ adb logcat | tee log.txt
// # Play video and get to frozen point.
// $ CTRL-C
// $ cat log.txt | grep -P 'T2: pts \d+' | wc -l
// 523
// $ cat log.txt | grep -P 'T3: pts \d+' | wc -l
// 522
// # Oh no, why isn't our client reading the audio we have ready to go?
// # Time to go find out...
#define STARBOARD_ANDROID_SHARED_AUDIO_DECODER_VERBOSE 0
#if STARBOARD_ANDROID_SHARED_AUDIO_DECODER_VERBOSE
#define VERBOSE_MEDIA_LOG() SB_LOG(INFO)
#else
#define VERBOSE_MEDIA_LOG() SB_EAT_STREAM_PARAMETERS
#endif
namespace starboard {
namespace android {
namespace shared {
namespace {
SbMediaAudioSampleType GetSupportedSampleType() {
SB_DCHECK(SbAudioSinkIsAudioSampleTypeSupported(
kSbMediaAudioSampleTypeInt16Deprecated));
return kSbMediaAudioSampleTypeInt16Deprecated;
}
void* IncrementPointerByBytes(void* pointer, int offset) {
return static_cast<uint8_t*>(pointer) + offset;
}
} // namespace
AudioDecoder::AudioDecoder(SbMediaAudioCodec audio_codec,
const SbMediaAudioSampleInfo& audio_sample_info,
SbDrmSystem drm_system)
: audio_codec_(audio_codec),
audio_sample_info_(audio_sample_info),
sample_type_(GetSupportedSampleType()),
output_sample_rate_(audio_sample_info.samples_per_second),
output_channel_count_(audio_sample_info.number_of_channels),
drm_system_(static_cast<DrmSystem*>(drm_system)) {
if (!InitializeCodec()) {
SB_LOG(ERROR) << "Failed to initialize audio decoder.";
}
}
AudioDecoder::~AudioDecoder() {}
void AudioDecoder::Initialize(const OutputCB& output_cb,
const ErrorCB& error_cb) {
SB_DCHECK(BelongsToCurrentThread());
SB_DCHECK(output_cb);
SB_DCHECK(!output_cb_);
SB_DCHECK(error_cb);
SB_DCHECK(!error_cb_);
SB_DCHECK(media_decoder_);
output_cb_ = output_cb;
error_cb_ = error_cb;
media_decoder_->Initialize(error_cb_);
}
void AudioDecoder::Decode(const scoped_refptr<InputBuffer>& input_buffer,
const ConsumedCB& consumed_cb) {
SB_DCHECK(BelongsToCurrentThread());
SB_DCHECK(input_buffer);
SB_DCHECK(output_cb_);
SB_DCHECK(media_decoder_);
VERBOSE_MEDIA_LOG() << "T1: timestamp " << input_buffer->timestamp();
media_decoder_->WriteInputBuffer(input_buffer);
ScopedLock lock(decoded_audios_mutex_);
if (media_decoder_->GetNumberOfPendingTasks() + decoded_audios_.size() <=
kMaxPendingWorkSize) {
Schedule(consumed_cb);
} else {
consumed_cb_ = consumed_cb;
}
}
void AudioDecoder::WriteEndOfStream() {
SB_DCHECK(BelongsToCurrentThread());
SB_DCHECK(output_cb_);
SB_DCHECK(media_decoder_);
media_decoder_->WriteEndOfStream();
}
scoped_refptr<AudioDecoder::DecodedAudio> AudioDecoder::Read(
int* samples_per_second) {
SB_DCHECK(BelongsToCurrentThread());
SB_DCHECK(output_cb_);
scoped_refptr<DecodedAudio> result;
{
starboard::ScopedLock lock(decoded_audios_mutex_);
SB_DCHECK(!decoded_audios_.empty());
if (!decoded_audios_.empty()) {
result = decoded_audios_.front();
VERBOSE_MEDIA_LOG() << "T3: timestamp " << result->timestamp();
decoded_audios_.pop();
}
}
if (consumed_cb_) {
Schedule(consumed_cb_);
consumed_cb_ = nullptr;
}
*samples_per_second = audio_sample_info_.samples_per_second;
return result;
}
void AudioDecoder::Reset() {
SB_DCHECK(BelongsToCurrentThread());
SB_DCHECK(output_cb_);
media_decoder_.reset();
if (!InitializeCodec()) {
// TODO: Communicate this failure to our clients somehow.
SB_LOG(ERROR) << "Failed to initialize codec after reset.";
}
consumed_cb_ = nullptr;
while (!decoded_audios_.empty()) {
decoded_audios_.pop();
}
CancelPendingJobs();
}
bool AudioDecoder::InitializeCodec() {
SB_DCHECK(!media_decoder_);
media_decoder_.reset(
new MediaDecoder(this, audio_codec_, audio_sample_info_, drm_system_));
if (media_decoder_->is_valid()) {
if (error_cb_) {
media_decoder_->Initialize(error_cb_);
}
return true;
}
media_decoder_.reset();
return false;
}
void AudioDecoder::ProcessOutputBuffer(
MediaCodecBridge* media_codec_bridge,
const DequeueOutputResult& dequeue_output_result) {
SB_DCHECK(media_codec_bridge);
SB_DCHECK(output_cb_);
SB_DCHECK(dequeue_output_result.index >= 0);
if (dequeue_output_result.num_bytes > 0) {
ScopedJavaByteBuffer byte_buffer(
media_codec_bridge->GetOutputBuffer(dequeue_output_result.index));
SB_DCHECK(!byte_buffer.IsNull());
int16_t* data = static_cast<int16_t*>(IncrementPointerByBytes(
byte_buffer.address(), dequeue_output_result.offset));
int size = dequeue_output_result.num_bytes;
if (2 * audio_sample_info_.samples_per_second == output_sample_rate_) {
// The audio is encoded using implicit HE-AAC. As the audio sink has
// been created already we try to down-mix the decoded data to half of
// its channels so the audio sink can play it with the correct pitch.
for (int i = 0; i < size / sizeof(int16_t); i++) {
data[i / 2] = (static_cast<int32_t>(data[i]) +
static_cast<int32_t>(data[i + 1]) / 2);
}
size /= 2;
}
scoped_refptr<DecodedAudio> decoded_audio = new DecodedAudio(
audio_sample_info_.number_of_channels, sample_type_,
kSbMediaAudioFrameStorageTypeInterleaved,
dequeue_output_result.presentation_time_microseconds, size);
memcpy(decoded_audio->buffer(), data, size);
{
starboard::ScopedLock lock(decoded_audios_mutex_);
decoded_audios_.push(decoded_audio);
VERBOSE_MEDIA_LOG() << "T2: timestamp "
<< decoded_audios_.front()->timestamp();
}
Schedule(output_cb_);
}
// BUFFER_FLAG_END_OF_STREAM may come with the last valid output buffer.
if (dequeue_output_result.flags & BUFFER_FLAG_END_OF_STREAM) {
{
starboard::ScopedLock lock(decoded_audios_mutex_);
decoded_audios_.push(new DecodedAudio());
}
Schedule(output_cb_);
}
media_codec_bridge->ReleaseOutputBuffer(dequeue_output_result.index, false);
}
void AudioDecoder::RefreshOutputFormat(MediaCodecBridge* media_codec_bridge) {
AudioOutputFormatResult output_format =
media_codec_bridge->GetAudioOutputFormat();
if (output_format.status == MEDIA_CODEC_ERROR) {
SB_LOG(ERROR) << "|getOutputFormat| failed";
return;
}
output_sample_rate_ = output_format.sample_rate;
output_channel_count_ = output_format.channel_count;
}
} // namespace shared
} // namespace android
} // namespace starboard