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// 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/audio_sink.h"
#include "starboard/common/scoped_ptr.h"
#include "starboard/log.h"
#include "starboard/media.h"
#include "starboard/mutex.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_renderer_internal.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 {
public:
AudioRendererImpl(JobQueue* job_queue,
scoped_ptr<AudioDecoder> decoder,
const SbMediaAudioHeader& audio_header);
~AudioRendererImpl() SB_OVERRIDE;
void WriteSample(const InputBuffer& input_buffer) SB_OVERRIDE;
void WriteEndOfStream() SB_OVERRIDE;
void Play() SB_OVERRIDE;
void Pause() SB_OVERRIDE;
#if SB_API_VERSION >= 4
void SetPlaybackRate(double playback_rate) SB_OVERRIDE;
#endif // SB_API_VERSION >= 4
void Seek(SbMediaTime seek_to_pts) SB_OVERRIDE;
bool IsEndOfStreamWritten() const SB_OVERRIDE {
return end_of_stream_written_;
};
bool IsEndOfStreamPlayed() const SB_OVERRIDE;
bool CanAcceptMoreData() const SB_OVERRIDE;
bool IsSeekingInProgress() const SB_OVERRIDE;
SbMediaTime GetCurrentTime() SB_OVERRIDE;
private:
// Preroll considered finished after either kPrerollFrames is cached or EOS
// is reached.
static const size_t kPrerollFrames = 64 * 1024;
// 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;
// When there are more than |kMaxBuffersInDecoder| buffers inside the audio
// decoder, the renderer won't accept more data.
static const int kMaxbuffersInDecoder = 32;
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 ReadFromDecoder();
bool AppendDecodedAudio_Locked(
const scoped_refptr<DecodedAudio>& decoded_audio);
// 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);
JobQueue* job_queue_;
const int channels_;
const int bytes_per_frame_;
double playback_rate_;
Mutex mutex_;
bool paused_;
bool seeking_;
SbMediaTime seeking_to_pts_;
std::vector<uint8_t> frame_buffer_;
uint8_t* frame_buffers_[1];
int frames_in_buffer_;
int offset_in_frames_;
int frames_consumed_;
SbTimeMonotonic frames_consumed_set_at_;
bool end_of_stream_written_;
bool end_of_stream_decoded_;
Closure log_frames_consumed_closure_;
scoped_ptr<AudioDecoder> decoder_;
SbAudioSink audio_sink_;
scoped_refptr<DecodedAudio> pending_decoded_audio_;
Closure read_from_decoder_closure_;
// 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_;
int buffers_in_decoder_;
};
} // namespace filter
} // namespace player
} // namespace starboard
} // namespace shared
} // namespace starboard
#endif // STARBOARD_SHARED_STARBOARD_PLAYER_FILTER_AUDIO_RENDERER_IMPL_INTERNAL_H_