root/Source/platform/mediastream/MediaStreamWebAudioSource.cpp

DEFINITIONS

1. provideInput

/*
 * Copyright 2014 Google Inc. All rights reserved.
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 * modification, are permitted provided that the following conditions
 * are met:
 *
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 *    notice, this list of conditions and the following disclaimer.
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 *    in the documentation and/or other materials provided with the
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 *    may be used to endorse or promote products derived from this
 *    software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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#include "config.h"

#if ENABLE(WEB_AUDIO)

#include "platform/mediastream/MediaStreamWebAudioSource.h"

#include "platform/audio/AudioBus.h"
#include "public/platform/WebAudioSourceProvider.h"

namespace WebCore {

MediaStreamWebAudioSource::MediaStreamWebAudioSource(PassOwnPtr<blink::WebAudioSourceProvider> provider)
    : m_webAudioSourceProvider(provider)
{
}

MediaStreamWebAudioSource::~MediaStreamWebAudioSource()
{
}

void MediaStreamWebAudioSource::provideInput(AudioBus* bus, size_t framesToProcess)
{
    ASSERT(bus);
    if (!bus)
        return;

    if (!m_webAudioSourceProvider) {
        bus->zero();
        return;
    }

    // Wrap the AudioBus channel data using WebVector.
    size_t n = bus->numberOfChannels();
    blink::WebVector<float*> webAudioData(n);
    for (size_t i = 0; i < n; ++i)
        webAudioData[i] = bus->channel(i)->mutableData();

    m_webAudioSourceProvider->provideInput(webAudioData, framesToProcess);
}

} // namespace WebCore

#endif // ENABLE(WEB_AUDIO)