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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_RENDERER_MEDIA_RENDERER_AUDIO_OUTPUT_DEVICE_H_
#define CONTENT_RENDERER_MEDIA_RENDERER_AUDIO_OUTPUT_DEVICE_H_
#include "base/memory/ref_counted.h"
#include "media/audio/audio_output_device.h"
namespace base {
class MessageLoopProxy;
}
namespace content {
class AudioDeviceFactory;
class AudioMessageFilter;
// Subclass of media::AudioOutputDevice to support additional concepts within
// the content component. Use AudioDeviceFactory to instantiate this class.
class RendererAudioOutputDevice
: NON_EXPORTED_BASE(public media::AudioOutputDevice) {
public:
// Set the source of the rendered audio data to the RenderView specified by
// |render_view_id|. Callers should keep in mind that the RenderView which
// caused the instantiation of RendererAudioOutputDevice might not necessarily
// be same as the RenderView which actually renders the audio data.
void SetSourceRenderView(int render_view_id);
virtual void Start() OVERRIDE;
virtual void Stop() OVERRIDE;
protected:
friend class AudioDeviceFactory;
// Creates an uninitialized RendererAudioOutputDevice. Clients must call
// Initialize() before using.
RendererAudioOutputDevice(
AudioMessageFilter* message_filter,
const scoped_refptr<base::MessageLoopProxy>& io_loop);
private:
virtual ~RendererAudioOutputDevice();
void OnStart();
void OnStop();
void OnSourceChange(int render_view_id);
int source_render_view_id_;
bool is_after_stream_created_;
DISALLOW_IMPLICIT_CONSTRUCTORS(RendererAudioOutputDevice);
};
} // namespace content
#endif // CONTENT_RENDERER_MEDIA_RENDERER_AUDIO_OUTPUT_DEVICE_H_
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