chromium/media/audio/audio_output_proxy.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.

#ifndef MEDIA_AUDIO_AUDIO_OUTPUT_PROXY_H_
#define MEDIA_AUDIO_AUDIO_OUTPUT_PROXY_H_

#include "base/compiler_specific.h"
#include "base/memory/weak_ptr.h"
#include "base/sequence_checker.h"
#include "media/audio/audio_io.h"
#include "media/base/audio_parameters.h"

namespace media {

class AudioOutputDispatcher;

// AudioOutputProxy is an audio output stream that uses resources more
// efficiently than a regular audio output stream: it opens audio
// device only when sound is playing, i.e. between Start() and Stop()
// (there is still one physical stream per each audio output proxy in
// playing state).
//
// AudioOutputProxy uses AudioOutputDispatcher to open and close
// physical output streams.
class MEDIA_EXPORT AudioOutputProxy : public AudioOutputStream { … };

}  // namespace media

#endif  // MEDIA_AUDIO_AUDIO_OUTPUT_PROXY_H_