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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_MEDIA_RENDERER_WEBAUDIODEVICE_IMPL_H_
#define CONTENT_RENDERER_MEDIA_MEDIA_RENDERER_WEBAUDIODEVICE_IMPL_H_
#include "base/memory/ref_counted.h"
#include "base/threading/thread_checker.h"
#include "media/audio/audio_parameters.h"
#include "media/base/audio_renderer_sink.h"
#include "third_party/WebKit/public/platform/WebAudioDevice.h"
#include "third_party/WebKit/public/platform/WebVector.h"
namespace media {
class AudioOutputDevice;
}
namespace content {
class RendererWebAudioDeviceImpl
: public WebKit::WebAudioDevice,
public media::AudioRendererSink::RenderCallback {
public:
RendererWebAudioDeviceImpl(const media::AudioParameters& params,
WebKit::WebAudioDevice::RenderCallback* callback,
int session_id);
virtual ~RendererWebAudioDeviceImpl();
// WebKit::WebAudioDevice implementation.
virtual void start();
virtual void stop();
virtual double sampleRate();
// AudioRendererSink::RenderCallback implementation.
virtual int Render(media::AudioBus* dest,
int audio_delay_milliseconds) OVERRIDE;
virtual void RenderIO(media::AudioBus* source,
media::AudioBus* dest,
int audio_delay_milliseconds) OVERRIDE;
virtual void OnRenderError() OVERRIDE;
private:
const media::AudioParameters params_;
// Weak reference to the callback into WebKit code.
WebKit::WebAudioDevice::RenderCallback* const client_callback_;
// To avoid the need for locking, ensure the control methods of the
// WebKit::WebAudioDevice implementation are called on the same thread.
base::ThreadChecker thread_checker_;
// When non-NULL, we are started. When NULL, we are stopped.
scoped_refptr<media::AudioOutputDevice> output_device_;
// ID to allow browser to select the correct input device for unified IO.
int session_id_;
DISALLOW_COPY_AND_ASSIGN(RendererWebAudioDeviceImpl);
};
} // namespace content
#endif // CONTENT_RENDERER_MEDIA_MEDIA_RENDERER_WEBAUDIODEVICE_IMPL_H_
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