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/*
* Copyright (C) 2010, 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 "AnalyserNode.h"
#include "AudioNodeInput.h"
#include "AudioNodeOutput.h"
#include "ExceptionCode.h"
namespace WebCore {
AnalyserNode::AnalyserNode(AudioContext* context, float sampleRate)
: AudioBasicInspectorNode(context, sampleRate)
{
addInput(adoptPtr(new AudioNodeInput(this)));
addOutput(adoptPtr(new AudioNodeOutput(this, 2)));
setNodeType(NodeTypeAnalyser);
initialize();
}
AnalyserNode::~AnalyserNode()
{
uninitialize();
}
void AnalyserNode::process(size_t framesToProcess)
{
AudioBus* outputBus = output(0)->bus();
if (!isInitialized() || !input(0)->isConnected()) {
outputBus->zero();
return;
}
AudioBus* inputBus = input(0)->bus();
// Give the analyser the audio which is passing through this AudioNode.
m_analyser.writeInput(inputBus, framesToProcess);
// For in-place processing, our override of pullInputs() will just pass the audio data through unchanged if the channel count matches from input to output
// (resulting in inputBus == outputBus). Otherwise, do an up-mix to stereo.
if (inputBus != outputBus)
outputBus->copyFrom(*inputBus);
}
void AnalyserNode::reset()
{
m_analyser.reset();
}
void AnalyserNode::setFftSize(unsigned size, ExceptionCode& ec)
{
if (!m_analyser.setFftSize(size))
ec = NOT_SUPPORTED_ERR;
}
} // namespace WebCore
#endif // ENABLE(WEB_AUDIO)
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