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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.
*/
#include "config.h"
#if ENABLE(WEB_AUDIO)
#include "modules/webaudio/MediaStreamAudioDestinationNode.h"
#include "modules/webaudio/AudioContext.h"
#include "modules/webaudio/AudioNodeInput.h"
#include "platform/UUID.h"
#include "platform/mediastream/MediaStreamCenter.h"
#include "public/platform/WebRTCPeerConnectionHandler.h"
#include "wtf/Locker.h"
namespace blink {
MediaStreamAudioDestinationHandler::MediaStreamAudioDestinationHandler(AudioNode& node, size_t numberOfChannels)
: AudioBasicInspectorHandler(NodeTypeMediaStreamAudioDestination, node, node.context()->sampleRate(), numberOfChannels)
, m_mixBus(AudioBus::create(numberOfChannels, ProcessingSizeInFrames))
{
m_source = MediaStreamSource::create("WebAudio-" + createCanonicalUUIDString(), MediaStreamSource::TypeAudio, "MediaStreamAudioDestinationNode", false, true, MediaStreamSource::ReadyStateLive, true);
MediaStreamSourceVector audioSources;
audioSources.append(m_source);
MediaStreamSourceVector videoSources;
m_stream = MediaStream::create(node.context()->executionContext(), MediaStreamDescriptor::create(audioSources, videoSources));
MediaStreamCenter::instance().didCreateMediaStreamAndTracks(m_stream->descriptor());
m_source->setAudioFormat(numberOfChannels, node.context()->sampleRate());
initialize();
}
MediaStreamAudioDestinationHandler::~MediaStreamAudioDestinationHandler()
{
ASSERT(!isInitialized());
}
void MediaStreamAudioDestinationHandler::dispose()
{
uninitialize();
AudioBasicInspectorHandler::dispose();
}
DEFINE_TRACE(MediaStreamAudioDestinationHandler)
{
visitor->trace(m_stream);
AudioBasicInspectorHandler::trace(visitor);
}
void MediaStreamAudioDestinationHandler::process(size_t numberOfFrames)
{
m_mixBus->copyFrom(*input(0)->bus());
m_source->consumeAudio(m_mixBus.get(), numberOfFrames);
}
// ----------------------------------------------------------------
MediaStreamAudioDestinationNode::MediaStreamAudioDestinationNode(AudioContext& context, size_t numberOfChannels)
: AudioNode(context)
{
setHandler(new MediaStreamAudioDestinationHandler(*this, numberOfChannels));
}
MediaStreamAudioDestinationNode* MediaStreamAudioDestinationNode::create(AudioContext& context, size_t numberOfChannels)
{
return new MediaStreamAudioDestinationNode(context, numberOfChannels);
}
MediaStream* MediaStreamAudioDestinationNode::stream() const
{
return static_cast<MediaStreamAudioDestinationHandler&>(handler()).stream();
}
} // namespace blink
#endif // ENABLE(WEB_AUDIO)
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