DynamicsCompressorNode.cpp   [plain text]

/*
 * Copyright (C) 2011, 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 "DynamicsCompressorNode.h"

#include "AudioContext.h"
#include "AudioNodeInput.h"
#include "AudioNodeOutput.h"
#include "DynamicsCompressor.h"

namespace WebCore {

DynamicsCompressorNode::DynamicsCompressorNode(AudioContext* context, double sampleRate)
    : AudioNode(context, sampleRate)
{
    addInput(adoptPtr(new AudioNodeInput(this)));
    addOutput(adoptPtr(new AudioNodeOutput(this, 2)));
    
    setType(NodeTypeDynamicsCompressor);
    
    initialize();
}

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

void DynamicsCompressorNode::process(size_t framesToProcess)
{
    AudioBus* outputBus = output(0)->bus();
    ASSERT(outputBus);

    m_dynamicsCompressor->process(input(0)->bus(), outputBus, framesToProcess);
}

void DynamicsCompressorNode::reset()
{
    m_dynamicsCompressor->reset();
}

void DynamicsCompressorNode::initialize()
{
    if (isInitialized())
        return;

    AudioNode::initialize();    
    m_dynamicsCompressor = adoptPtr(new DynamicsCompressor(true, sampleRate()));
}

void DynamicsCompressorNode::uninitialize()
{
    if (!isInitialized())
        return;

    m_dynamicsCompressor.clear();
    AudioNode::uninitialize();
}

} // namespace WebCore

#endif // ENABLE(WEB_AUDIO)