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/*
* Copyright (C) 2011, 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 MediaElementAudioSourceNode_h
#define MediaElementAudioSourceNode_h
#if ENABLE(WEB_AUDIO) && ENABLE(VIDEO)
#include "AudioNode.h"
#include "AudioSourceProviderClient.h"
#include "HTMLMediaElement.h"
#include "MultiChannelResampler.h"
#include <wtf/OwnPtr.h>
#include <wtf/PassRefPtr.h>
#include <wtf/Threading.h>
namespace WebCore {
class AudioContext;
class MediaElementAudioSourceNode : public AudioNode, public AudioSourceProviderClient {
public:
static PassRefPtr<MediaElementAudioSourceNode> create(AudioContext*, HTMLMediaElement*);
virtual ~MediaElementAudioSourceNode();
HTMLMediaElement* mediaElement() { return m_mediaElement.get(); }
// AudioNode
virtual void process(size_t framesToProcess);
virtual void reset();
// AudioSourceProviderClient
virtual void setFormat(size_t numberOfChannels, float sampleRate);
void lock();
void unlock();
private:
MediaElementAudioSourceNode(AudioContext*, HTMLMediaElement*);
virtual double tailTime() const OVERRIDE { return 0; }
virtual double latencyTime() const OVERRIDE { return 0; }
// As an audio source, we will never propagate silence.
virtual bool propagatesSilence() const OVERRIDE { return false; }
RefPtr<HTMLMediaElement> m_mediaElement;
Mutex m_processLock;
unsigned m_sourceNumberOfChannels;
double m_sourceSampleRate;
OwnPtr<MultiChannelResampler> m_multiChannelResampler;
};
} // namespace WebCore
#endif // ENABLE(WEB_AUDIO) && ENABLE(VIDEO)
#endif // MediaElementAudioSourceNode_h
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