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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.
*/
#pragma once
#if ENABLE(WEB_AUDIO) && ENABLE(MEDIA_STREAM)
#include "AudioNode.h"
#include "AudioSourceProviderClient.h"
#include "MediaStream.h"
#include "MultiChannelResampler.h"
#include <wtf/Lock.h>
namespace WebCore {
class AudioContext;
struct MediaStreamAudioSourceOptions;
class MultiChannelResampler;
class WebAudioSourceProvider;
class MediaStreamAudioSourceNode final : public AudioNode, public AudioSourceProviderClient {
WTF_MAKE_ISO_ALLOCATED(MediaStreamAudioSourceNode);
public:
static ExceptionOr<Ref<MediaStreamAudioSourceNode>> create(BaseAudioContext&, MediaStreamAudioSourceOptions&&);
~MediaStreamAudioSourceNode();
MediaStream& mediaStream() { return m_mediaStream; }
private:
MediaStreamAudioSourceNode(BaseAudioContext&, MediaStream&, Ref<WebAudioSourceProvider>&&);
// AudioNode
void process(size_t framesToProcess) final;
// AudioSourceProviderClient
void setFormat(size_t numberOfChannels, float sampleRate) final;
void provideInput(AudioBus*, size_t framesToProcess);
double tailTime() const override { return 0; }
double latencyTime() const override { return 0; }
bool requiresTailProcessing() const final { return false; }
// As an audio source, we will never propagate silence.
bool propagatesSilence() const override { return false; }
Ref<MediaStream> m_mediaStream;
Ref<WebAudioSourceProvider> m_provider;
std::unique_ptr<MultiChannelResampler> m_multiChannelResampler WTF_GUARDED_BY_LOCK(m_processLock);
Lock m_processLock;
unsigned m_sourceNumberOfChannels WTF_GUARDED_BY_LOCK(m_processLock) { 0 };
double m_sourceSampleRate WTF_GUARDED_BY_LOCK(m_processLock) { 0 };
};
} // namespace WebCore
#endif // ENABLE(WEB_AUDIO) && ENABLE(MEDIA_STREAM)
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