/* * 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