chromium/media/audio/audio_output_dispatcher.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.

// AudioOutputDispatcher is a single-threaded base class that dispatches
// creation and deletion of audio output streams. AudioOutputProxy objects use
// this class to allocate and recycle actual audio output streams. When playback
// is started, the proxy calls StartStream() to get an output stream that it
// uses to play audio. When playback is stopped, the proxy returns the stream
// back to the dispatcher by calling StopStream().
//
// AudioManagerBase creates one specialization of AudioOutputDispatcher on the
// audio thread for each possible set of audio parameters. I.e streams with
// different parameters are managed independently.  The AudioOutputDispatcher
// instance is then deleted on the audio thread when the AudioManager shuts
// down.

#ifndef MEDIA_AUDIO_AUDIO_OUTPUT_DISPATCHER_H_
#define MEDIA_AUDIO_AUDIO_OUTPUT_DISPATCHER_H_

#include "base/memory/raw_ptr.h"
#include "media/audio/audio_io.h"

namespace media {
class AudioManager;
class AudioOutputProxy;

// Lives and must be called on AudioManager device thread.
class MEDIA_EXPORT AudioOutputDispatcher { … };

}  // namespace media

#endif  // MEDIA_AUDIO_AUDIO_OUTPUT_DISPATCHER_H_