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/*
* 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 "modules/webaudio/WaveShaperNode.h"
#if ENABLE(WEB_AUDIO)
#include "bindings/core/v8/ExceptionMessages.h"
#include "bindings/core/v8/ExceptionState.h"
#include "core/dom/ExceptionCode.h"
#include "modules/webaudio/AbstractAudioContext.h"
#include "modules/webaudio/AudioBasicProcessorHandler.h"
#include "wtf/MainThread.h"
namespace blink {
WaveShaperNode::WaveShaperNode(AbstractAudioContext& context)
: AudioNode(context)
{
setHandler(AudioBasicProcessorHandler::create(AudioHandler::NodeTypeWaveShaper, *this, context.sampleRate(), adoptPtr(new WaveShaperProcessor(context.sampleRate(), 1))));
handler().initialize();
}
WaveShaperProcessor* WaveShaperNode::waveShaperProcessor() const
{
return static_cast<WaveShaperProcessor*>(static_cast<AudioBasicProcessorHandler&>(handler()).processor());
}
void WaveShaperNode::setCurve(DOMFloat32Array* curve, ExceptionState& exceptionState)
{
ASSERT(isMainThread());
if (curve && curve->length() < 2) {
exceptionState.throwDOMException(
InvalidAccessError,
ExceptionMessages::indexExceedsMinimumBound<unsigned>(
"curve length",
curve->length(),
2));
return;
}
waveShaperProcessor()->setCurve(curve);
}
DOMFloat32Array* WaveShaperNode::curve()
{
return waveShaperProcessor()->curve();
}
void WaveShaperNode::setOversample(const String& type)
{
ASSERT(isMainThread());
// This is to synchronize with the changes made in
// AudioBasicProcessorNode::checkNumberOfChannelsForInput() where we can
// initialize() and uninitialize().
AbstractAudioContext::AutoLocker contextLocker(context());
if (type == "none") {
waveShaperProcessor()->setOversample(WaveShaperProcessor::OverSampleNone);
} else if (type == "2x") {
waveShaperProcessor()->setOversample(WaveShaperProcessor::OverSample2x);
} else if (type == "4x") {
waveShaperProcessor()->setOversample(WaveShaperProcessor::OverSample4x);
} else {
ASSERT_NOT_REACHED();
}
}
String WaveShaperNode::oversample() const
{
switch (const_cast<WaveShaperNode*>(this)->waveShaperProcessor()->oversample()) {
case WaveShaperProcessor::OverSampleNone:
return "none";
case WaveShaperProcessor::OverSample2x:
return "2x";
case WaveShaperProcessor::OverSample4x:
return "4x";
default:
ASSERT_NOT_REACHED();
return "none";
}
}
} // namespace blink
#endif // ENABLE(WEB_AUDIO)
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