chromium/media/renderers/audio_renderer_impl.h

// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// Audio rendering unit utilizing an AudioRendererSink to output data.
//
// This class lives inside three threads during it's lifetime, namely:
// 1. Render thread
//    Where the object is created.
// 2. Media thread (provided via constructor)
//    All AudioDecoder methods are called on this thread.
// 3. Audio thread created by the AudioRendererSink.
//    Render() is called here where audio data is decoded into raw PCM data.
//
// AudioRendererImpl talks to an AudioRendererAlgorithm that takes care of
// queueing audio data and stretching/shrinking audio data when playback rate !=
// 1.0 or 0.0.

#ifndef MEDIA_RENDERERS_AUDIO_RENDERER_IMPL_H_
#define MEDIA_RENDERERS_AUDIO_RENDERER_IMPL_H_

#include <stdint.h>

#include <memory>
#include <optional>

#include "base/memory/raw_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/power_monitor/power_observer.h"
#include "base/synchronization/lock.h"
#include "base/task/sequenced_task_runner.h"
#include "base/time/time.h"
#include "build/build_config.h"
#include "media/base/audio_decoder.h"
#include "media/base/audio_decoder_config.h"
#include "media/base/audio_renderer.h"
#include "media/base/audio_renderer_sink.h"
#include "media/base/decryptor.h"
#include "media/base/media_log.h"
#include "media/base/time_source.h"
#include "media/filters/audio_renderer_algorithm.h"
#include "media/filters/decoder_stream.h"
#include "media/renderers/renderer_impl_factory.h"

namespace base {
class TickClock;
}  // namespace base

namespace media {

class AudioBufferConverter;
class AudioBus;
class AudioClock;
class NullAudioSink;
class SpeechRecognitionClient;

class MEDIA_EXPORT AudioRendererImpl
    : public AudioRenderer,
      public TimeSource,
      public base::PowerSuspendObserver,
      public AudioRendererSink::RenderCallback { … };

}  // namespace media

#endif  // MEDIA_RENDERERS_AUDIO_RENDERER_IMPL_H_