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/*
* Copyright (C) 2012, 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 MediaStreamAudioSourceNode_h
#define MediaStreamAudioSourceNode_h
#include "modules/mediastream/MediaStream.h"
#include "modules/webaudio/AudioSourceNode.h"
#include "platform/audio/AudioSourceProvider.h"
#include "platform/audio/AudioSourceProviderClient.h"
#include "wtf/OwnPtr.h"
#include "wtf/PassRefPtr.h"
#include "wtf/Threading.h"
namespace blink {
class AbstractAudioContext;
class MediaStreamAudioSourceHandler final : public AudioHandler {
public:
static PassRefPtr<MediaStreamAudioSourceHandler> create(AudioNode&, MediaStream&, MediaStreamTrack*, PassOwnPtr<AudioSourceProvider>);
~MediaStreamAudioSourceHandler() override;
MediaStream* getMediaStream() { return m_mediaStream.get(); }
// AudioHandler
void process(size_t framesToProcess) override;
// A helper for AudioSourceProviderClient implementation of
// MediaStreamAudioSourceNode.
void setFormat(size_t numberOfChannels, float sampleRate);
AudioSourceProvider* getAudioSourceProvider() const { return m_audioSourceProvider.get(); }
private:
MediaStreamAudioSourceHandler(AudioNode&, MediaStream&, MediaStreamTrack*, PassOwnPtr<AudioSourceProvider>);
// As an audio source, we will never propagate silence.
bool propagatesSilence() const override { return false; }
// These Persistents don't make reference cycles including the owner
// MediaStreamAudioSourceNode.
Persistent<MediaStream> m_mediaStream;
Persistent<MediaStreamTrack> m_audioTrack;
OwnPtr<AudioSourceProvider> m_audioSourceProvider;
Mutex m_processLock;
unsigned m_sourceNumberOfChannels;
};
class MediaStreamAudioSourceNode final : public AudioSourceNode, public AudioSourceProviderClient {
DEFINE_WRAPPERTYPEINFO();
USING_GARBAGE_COLLECTED_MIXIN(MediaStreamAudioSourceNode);
public:
static MediaStreamAudioSourceNode* create(AbstractAudioContext&, MediaStream&, MediaStreamTrack*, PassOwnPtr<AudioSourceProvider>);
DECLARE_VIRTUAL_TRACE();
MediaStreamAudioSourceHandler& mediaStreamAudioSourceHandler() const;
MediaStream* getMediaStream() const;
// AudioSourceProviderClient functions:
void setFormat(size_t numberOfChannels, float sampleRate) override;
private:
MediaStreamAudioSourceNode(AbstractAudioContext&, MediaStream&, MediaStreamTrack*, PassOwnPtr<AudioSourceProvider>);
};
} // namespace blink
#endif // MediaStreamAudioSourceNode_h
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