| // Copyright 2016 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. |
| |
| #ifndef STARBOARD_SHARED_STARBOARD_PLAYER_FILTER_AUDIO_RENDERER_IMPL_INTERNAL_H_ |
| #define STARBOARD_SHARED_STARBOARD_PLAYER_FILTER_AUDIO_RENDERER_IMPL_INTERNAL_H_ |
| |
| #include <vector> |
| |
| #include "starboard/atomic.h" |
| #include "starboard/audio_sink.h" |
| #include "starboard/common/scoped_ptr.h" |
| #include "starboard/log.h" |
| #include "starboard/media.h" |
| #include "starboard/shared/internal_only.h" |
| #include "starboard/shared/starboard/player/closure.h" |
| #include "starboard/shared/starboard/player/decoded_audio_internal.h" |
| #include "starboard/shared/starboard/player/filter/audio_decoder_internal.h" |
| #include "starboard/shared/starboard/player/filter/audio_frame_tracker.h" |
| #include "starboard/shared/starboard/player/filter/audio_renderer_internal.h" |
| #include "starboard/shared/starboard/player/filter/audio_resampler.h" |
| #include "starboard/shared/starboard/player/filter/audio_time_stretcher.h" |
| #include "starboard/shared/starboard/player/input_buffer_internal.h" |
| #include "starboard/shared/starboard/player/job_queue.h" |
| #include "starboard/types.h" |
| |
| namespace starboard { |
| namespace shared { |
| namespace starboard { |
| namespace player { |
| namespace filter { |
| |
| // A default implementation of |AudioRenderer| that only depends on the |
| // |AudioDecoder| interface, rather than a platform specific implementation. |
| class AudioRendererImpl : public AudioRenderer, private JobQueue::JobOwner { |
| public: |
| // Preroll is considered as finished after either the amount of audio caches |
| // exceeds kPrerollTime or if EOS is reached. |
| static const size_t kPrerollTime = kSbTimeSecond / 4; |
| |
| AudioRendererImpl( |
| scoped_ptr<AudioDecoder> decoder, |
| const SbMediaAudioHeader& audio_header, |
| scoped_ptr<AudioFrameTracker> audio_frame_tracker = |
| scoped_ptr<AudioFrameTracker>(new SingleThreadedAudioFrameTracker()) |
| .Pass()); |
| ~AudioRendererImpl() SB_OVERRIDE; |
| |
| void WriteSample(const scoped_refptr<InputBuffer>& input_buffer) SB_OVERRIDE; |
| void WriteEndOfStream() SB_OVERRIDE; |
| |
| void Play() SB_OVERRIDE; |
| void Pause() SB_OVERRIDE; |
| void SetPlaybackRate(double playback_rate) SB_OVERRIDE; |
| void SetVolume(double volume) SB_OVERRIDE; |
| void Seek(SbMediaTime seek_to_pts) SB_OVERRIDE; |
| |
| bool IsEndOfStreamWritten() const SB_OVERRIDE { |
| return eos_state_.load() >= kEOSWrittenToDecoder; |
| }; |
| bool IsEndOfStreamPlayed() const SB_OVERRIDE; |
| bool CanAcceptMoreData() const SB_OVERRIDE; |
| bool IsSeekingInProgress() const SB_OVERRIDE; |
| SbMediaTime GetCurrentTime() SB_OVERRIDE; |
| |
| protected: |
| atomic_bool paused_; |
| atomic_bool seeking_; |
| SbMediaTime seeking_to_pts_; |
| scoped_ptr<AudioFrameTracker> audio_frame_tracker_; |
| |
| atomic_int64_t frames_sent_to_sink_; |
| atomic_int64_t frames_consumed_by_sink_; |
| atomic_int32_t frames_consumed_by_sink_since_last_get_current_time_; |
| |
| scoped_ptr<AudioDecoder> decoder_; |
| |
| atomic_int64_t frames_consumed_set_at_; |
| double playback_rate_; |
| |
| private: |
| enum EOSState { |
| kEOSNotReceived, |
| kEOSWrittenToDecoder, |
| kEOSDecoded, |
| kEOSSentToSink |
| }; |
| |
| // Set a soft limit for the max audio frames we can cache so we can: |
| // 1. Avoid using too much memory. |
| // 2. Have the audio cache full to simulate the state that the renderer can no |
| // longer accept more data. |
| static const size_t kMaxCachedFrames = 256 * 1024; |
| // The audio renderer tries to append |kAppendFrameUnit| frames every time to |
| // the sink buffer. |
| static const size_t kFrameAppendUnit = 16384; |
| |
| void CreateAudioSinkAndResampler(); |
| void UpdateSourceStatus(int* frames_in_buffer, |
| int* offset_in_frames, |
| bool* is_playing, |
| bool* is_eos_reached); |
| void ConsumeFrames(int frames_consumed); |
| void LogFramesConsumed(); |
| |
| void OnDecoderConsumed(); |
| void OnDecoderOutput(); |
| void ProcessAudioData(); |
| void FillResamplerAndTimeStretcher(); |
| bool AppendAudioToFrameBuffer(); |
| |
| // SbAudioSink callbacks |
| static void UpdateSourceStatusFunc(int* frames_in_buffer, |
| int* offset_in_frames, |
| bool* is_playing, |
| bool* is_eos_reached, |
| void* context); |
| static void ConsumeFramesFunc(int frames_consumed, void* context); |
| |
| atomic_int32_t eos_state_; |
| const int channels_; |
| const SbMediaAudioSampleType sink_sample_type_; |
| const int bytes_per_frame_; |
| |
| scoped_ptr<AudioResampler> resampler_; |
| AudioTimeStretcher time_stretcher_; |
| double volume_; |
| |
| std::vector<uint8_t> frame_buffer_; |
| uint8_t* frame_buffers_[1]; |
| |
| int32_t pending_decoder_outputs_; |
| Closure log_frames_consumed_closure_; |
| |
| SbAudioSink audio_sink_; |
| |
| bool can_accept_more_data_; |
| bool process_audio_data_scheduled_; |
| |
| // Our owner will attempt to seek to pts 0 when playback begins. In |
| // general, seeking could require a full reset of the underlying decoder on |
| // some platforms, so we make an effort to improve playback startup |
| // performance by keeping track of whether we already have a fresh decoder, |
| // and can thus avoid doing a full reset. |
| bool decoder_needs_full_reset_; |
| }; |
| |
| } // namespace filter |
| } // namespace player |
| } // namespace starboard |
| } // namespace shared |
| } // namespace starboard |
| |
| #endif // STARBOARD_SHARED_STARBOARD_PLAYER_FILTER_AUDIO_RENDERER_IMPL_INTERNAL_H_ |