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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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. 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 INC. 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 AudioDestinationNode_h
#define AudioDestinationNode_h
#include "AudioDestination.h"
#include "AudioNode.h"
#include "AudioSourceProvider.h"
#include <wtf/OwnPtr.h>
#include <wtf/PassRefPtr.h>
namespace WebCore {
class AudioBus;
class AudioContext;
class AudioDestinationNode : public AudioNode, public AudioSourceProvider {
public:
static PassRefPtr<AudioDestinationNode> create(AudioContext* context)
{
return adoptRef(new AudioDestinationNode(context));
}
virtual ~AudioDestinationNode();
// AudioNode
virtual void process(size_t) { }; // we're pulled by hardware so this is never called
virtual void reset() { m_currentTime = 0.0; };
virtual void initialize();
virtual void uninitialize();
// The audio hardware calls here periodically to gets its input stream.
virtual void provideInput(AudioBus*, size_t numberOfFrames);
double currentTime() { return m_currentTime; }
double sampleRate() const { return m_destination->sampleRate(); }
unsigned numberOfChannels() const { return 2; } // FIXME: update when multi-channel (more than stereo) is supported
private:
AudioDestinationNode(AudioContext*);
OwnPtr<AudioDestination> m_destination;
double m_currentTime;
};
} // namespace WebCore
#endif // AudioDestinationNode_h
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