| // Copyright 2017 Google Inc. 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/shared/win32/audio_decoder.h" |
| |
| #include "starboard/atomic.h" |
| #include "starboard/audio_sink.h" |
| #include "starboard/log.h" |
| #include "starboard/memory.h" |
| #include "starboard/shared/win32/media_common.h" |
| |
| namespace starboard { |
| namespace shared { |
| namespace win32 { |
| |
| class AudioDecoder::CallbackScheduler : private JobOwner { |
| public: |
| CallbackScheduler() : callback_signaled_(false) {} |
| |
| void SetCallbackOnce(Closure cb) { |
| SB_DCHECK(cb.is_valid()); |
| ::starboard::ScopedLock lock(mutex_); |
| if (!cb_.is_valid()) { |
| cb_ = cb; |
| } |
| } |
| |
| void ScheduleCallbackIfNecessary() { |
| ::starboard::ScopedLock lock(mutex_); |
| if (!cb_.is_valid() || callback_signaled_) { |
| return; |
| } |
| callback_signaled_ = true; |
| JobOwner::Schedule(cb_); |
| } |
| |
| void OnCallbackSignaled() { |
| ::starboard::ScopedLock lock(mutex_); |
| callback_signaled_ = false; |
| } |
| |
| Closure cb_; |
| ::starboard::Mutex mutex_; |
| bool callback_signaled_; |
| }; |
| |
| AudioDecoder::AudioDecoder(SbMediaAudioCodec audio_codec, |
| const SbMediaAudioHeader& audio_header) |
| : sample_type_(kSbMediaAudioSampleTypeFloat32), |
| stream_ended_(false), |
| audio_codec_(audio_codec), |
| audio_header_(audio_header) { |
| SB_DCHECK(audio_codec == kSbMediaAudioCodecAac); |
| decoder_impl_ = AbstractWin32AudioDecoder::Create( |
| audio_codec_, GetStorageType(), GetSampleType(), audio_header_); |
| decoder_thread_.reset(new AudioDecoderThread(decoder_impl_.get(), this)); |
| callback_scheduler_.reset(new CallbackScheduler()); |
| } |
| |
| AudioDecoder::~AudioDecoder() { |
| decoder_thread_.reset(nullptr); |
| decoder_impl_.reset(nullptr); |
| callback_scheduler_.reset(nullptr); |
| } |
| |
| void AudioDecoder::Decode(const scoped_refptr<InputBuffer>& input_buffer, |
| const Closure& consumed_cb) { |
| SB_DCHECK(input_buffer); |
| callback_scheduler_->SetCallbackOnce(consumed_cb); |
| callback_scheduler_->OnCallbackSignaled(); |
| const bool can_take_more_data = decoder_thread_->QueueInput(input_buffer); |
| if (can_take_more_data) { |
| callback_scheduler_->ScheduleCallbackIfNecessary(); |
| } |
| |
| if (stream_ended_) { |
| SB_LOG(ERROR) << "Decode() is called after WriteEndOfStream() is called."; |
| return; |
| } |
| } |
| |
| void AudioDecoder::WriteEndOfStream() { |
| ::starboard::ScopedLock lock(mutex_); |
| stream_ended_ = true; |
| decoder_thread_->QueueEndOfStream(); |
| } |
| |
| scoped_refptr<AudioDecoder::DecodedAudio> AudioDecoder::Read() { |
| DecodedAudioPtr data = decoded_data_.PopFront(); |
| SB_DCHECK(data); |
| return data; |
| } |
| |
| void AudioDecoder::Reset() { |
| decoder_thread_.reset(nullptr); |
| decoder_impl_.reset(nullptr); |
| decoder_impl_ = AbstractWin32AudioDecoder::Create( |
| audio_codec_, GetStorageType(), GetSampleType(), audio_header_); |
| decoder_thread_.reset(new AudioDecoderThread(decoder_impl_.get(), this)); |
| decoded_data_.Clear(); |
| stream_ended_ = false; |
| CancelPendingJobs(); |
| } |
| |
| SbMediaAudioSampleType AudioDecoder::GetSampleType() const { |
| return sample_type_; |
| } |
| |
| int AudioDecoder::GetSamplesPerSecond() const { |
| return audio_header_.samples_per_second; |
| } |
| |
| void AudioDecoder::Initialize(const Closure& output_cb) { |
| SB_DCHECK(output_cb.is_valid()); |
| SB_DCHECK(!output_cb_.is_valid()); |
| output_cb_ = output_cb; |
| } |
| |
| void AudioDecoder::OnAudioDecoded(DecodedAudioPtr data) { |
| decoded_data_.PushBack(data); |
| if (output_cb_.is_valid()) { |
| Schedule(output_cb_); |
| } |
| callback_scheduler_->ScheduleCallbackIfNecessary(); |
| } |
| |
| } // namespace win32 |
| } // namespace shared |
| } // namespace starboard |