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/*
* Copyright (C) 2010 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef AudioDestinationMac_h
#define AudioDestinationMac_h
#include "AudioBus.h"
#include "AudioDestination.h"
#include <AudioUnit/AudioUnit.h>
#include <wtf/OwnPtr.h>
#include <wtf/RefPtr.h>
namespace WebCore {
class AudioSessionManagerToken;
// An AudioDestination using CoreAudio's default output AudioUnit
class AudioDestinationMac : public AudioDestination {
public:
AudioDestinationMac(AudioIOCallback&, float sampleRate);
virtual ~AudioDestinationMac();
virtual void start();
virtual void stop();
bool isPlaying() { return m_isPlaying; }
float sampleRate() const { return m_sampleRate; }
private:
void configure();
// DefaultOutputUnit callback
static OSStatus inputProc(void* userData, AudioUnitRenderActionFlags*, const AudioTimeStamp*, UInt32 busNumber, UInt32 numberOfFrames, AudioBufferList* ioData);
OSStatus render(UInt32 numberOfFrames, AudioBufferList* ioData);
AudioUnit m_outputUnit;
AudioIOCallback& m_callback;
RefPtr<AudioBus> m_renderBus;
float m_sampleRate;
bool m_isPlaying;
#if USE(AUDIO_SESSION)
OwnPtr<AudioSessionManagerToken> m_audioSessionManagerToken;
#endif
};
} // namespace WebCore
#endif // AudioDestinationMac_h
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