MediaStreamAudioDestinationNode.cpp   [plain text]

/*
 * Copyright (C) 2012, Google Inc. All rights reserved.
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#include "config.h"
#include "MediaStreamAudioDestinationNode.h"

#if ENABLE(WEB_AUDIO) && ENABLE(MEDIA_STREAM)

#include "AudioContext.h"
#include "AudioNodeInput.h"
#include "MediaStream.h"
#include "MediaStreamAudioSource.h"
#include <wtf/Locker.h>

namespace WebCore {

Ref<MediaStreamAudioDestinationNode> MediaStreamAudioDestinationNode::create(AudioContext& context, size_t numberOfChannels)
{
    return adoptRef(*new MediaStreamAudioDestinationNode(context, numberOfChannels));
}

MediaStreamAudioDestinationNode::MediaStreamAudioDestinationNode(AudioContext& context, size_t numberOfChannels)
    : AudioBasicInspectorNode(context, context.sampleRate(), numberOfChannels)
    , m_mixBus(AudioBus::create(numberOfChannels, ProcessingSizeInFrames))
{
    setNodeType(NodeTypeMediaStreamAudioDestination);

    m_source = MediaStreamAudioSource::create();
    Vector<Ref<RealtimeMediaSource>> audioSources;
    audioSources.append(*m_source);
    m_stream = MediaStream::create(*context.scriptExecutionContext(), MediaStreamPrivate::create(audioSources, { }));

    m_source->setAudioFormat(numberOfChannels, context.sampleRate());

    initialize();
}

RealtimeMediaSource* MediaStreamAudioDestinationNode::mediaStreamSource()
{
    return m_source.get();
}

MediaStreamAudioDestinationNode::~MediaStreamAudioDestinationNode()
{
    uninitialize();
}

void MediaStreamAudioDestinationNode::process(size_t numberOfFrames)
{
    m_mixBus->copyFrom(*input(0)->bus());
    m_source->consumeAudio(m_mixBus.get(), numberOfFrames);
}

void MediaStreamAudioDestinationNode::reset()
{
}

} // namespace WebCore

#endif // ENABLE(WEB_AUDIO) && ENABLE(MEDIA_STREAM)