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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 "config.h"
#include "WaveShaperNode.h"
#if ENABLE(WEB_AUDIO)
#include "AudioContext.h"
#include <JavaScriptCore/JSCInlines.h>
#include <JavaScriptCore/TypedArrayInlines.h>
#include <JavaScriptCore/TypedArrays.h>
#include <wtf/IsoMallocInlines.h>
#include <wtf/MainThread.h>
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(WaveShaperNode);
ExceptionOr<Ref<WaveShaperNode>> WaveShaperNode::create(BaseAudioContext& context, const WaveShaperOptions& options)
{
RefPtr<Float32Array> curve;
if (options.curve) {
curve = Float32Array::tryCreate(options.curve->data(), options.curve->size());
if (!curve)
return Exception { InvalidStateError, "Invalid curve parameter"_s };
}
auto node = adoptRef(*new WaveShaperNode(context));
auto result = node->handleAudioNodeOptions(options, { 2, ChannelCountMode::Max, ChannelInterpretation::Speakers });
if (result.hasException())
return result.releaseException();
if (curve) {
result = node->setCurveForBindings(WTFMove(curve));
if (result.hasException())
return result.releaseException();
}
node->setOversampleForBindings(options.oversample);
return node;
}
WaveShaperNode::WaveShaperNode(BaseAudioContext& context)
: AudioBasicProcessorNode(context, NodeTypeWaveShaper)
{
m_processor = makeUnique<WaveShaperProcessor>(context.sampleRate(), 1);
initialize();
}
ExceptionOr<void> WaveShaperNode::setCurveForBindings(RefPtr<Float32Array>&& curve)
{
ASSERT(isMainThread());
DEBUG_LOG(LOGIDENTIFIER);
if (curve && curve->length() < 2)
return Exception { InvalidStateError, "Length of curve array cannot be less than 2"_s };
if (curve) {
// The specification states that we should maintain an internal copy of the curve so that
// subsequent modifications of the contents of the array have no effect.
auto clonedCurve = Float32Array::create(curve->data(), curve->length());
curve = WTFMove(clonedCurve);
}
waveShaperProcessor()->setCurveForBindings(curve.get());
return { };
}
Float32Array* WaveShaperNode::curveForBindings()
{
ASSERT(isMainThread());
return waveShaperProcessor()->curveForBindings();
}
static inline WaveShaperProcessor::OverSampleType processorType(OverSampleType type)
{
switch (type) {
case OverSampleType::None:
return WaveShaperProcessor::OverSampleNone;
case OverSampleType::_2x:
return WaveShaperProcessor::OverSample2x;
case OverSampleType::_4x:
return WaveShaperProcessor::OverSample4x;
}
ASSERT_NOT_REACHED();
return WaveShaperProcessor::OverSampleNone;
}
void WaveShaperNode::setOversampleForBindings(OverSampleType type)
{
ASSERT(isMainThread());
INFO_LOG(LOGIDENTIFIER, type);
// Synchronize with any graph changes or changes to channel configuration.
Locker contextLocker { context().graphLock() };
waveShaperProcessor()->setOversampleForBindings(processorType(type));
}
auto WaveShaperNode::oversampleForBindings() const -> OverSampleType
{
ASSERT(isMainThread());
switch (waveShaperProcessor()->oversampleForBindings()) {
case WaveShaperProcessor::OverSampleNone:
return OverSampleType::None;
case WaveShaperProcessor::OverSample2x:
return OverSampleType::_2x;
case WaveShaperProcessor::OverSample4x:
return OverSampleType::_4x;
}
ASSERT_NOT_REACHED();
return OverSampleType::None;
}
bool WaveShaperNode::propagatesSilence() const
{
if (!waveShaperProcessor()->processLock().tryLock())
return false;
Locker locker { AdoptLock, waveShaperProcessor()->processLock() };
auto curve = waveShaperProcessor()->curve();
return !curve || !curve->length();
}
} // namespace WebCore
#endif // ENABLE(WEB_AUDIO)
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