103 lines
3.5 KiB
C++
103 lines
3.5 KiB
C++
/*
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* Copyright (C) 2011, Google Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#if ENABLE(WEB_AUDIO)
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#include "WaveShaperProcessor.h"
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#include "WaveShaperDSPKernel.h"
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namespace WebCore {
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WaveShaperProcessor::WaveShaperProcessor(float sampleRate, size_t numberOfChannels)
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: AudioDSPKernelProcessor(sampleRate, numberOfChannels)
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{
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}
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WaveShaperProcessor::~WaveShaperProcessor()
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{
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if (isInitialized())
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uninitialize();
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}
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std::unique_ptr<AudioDSPKernel> WaveShaperProcessor::createKernel()
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{
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return makeUnique<WaveShaperDSPKernel>(this);
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}
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void WaveShaperProcessor::setCurveForBindings(Float32Array* curve)
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{
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ASSERT(isMainThread());
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// This synchronizes with process().
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Locker locker { m_processLock };
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m_curve = curve;
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}
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void WaveShaperProcessor::setOversampleForBindings(OverSampleType oversample)
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{
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ASSERT(isMainThread());
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// This synchronizes with process().
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Locker locker { m_processLock };
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m_oversample = oversample;
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if (oversample == OverSampleNone)
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return;
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for (auto& audioDSPKernel : m_kernels)
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static_cast<WaveShaperDSPKernel&>(*audioDSPKernel).lazyInitializeOversampling();
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}
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void WaveShaperProcessor::process(const AudioBus* source, AudioBus* destination, size_t framesToProcess)
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{
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if (!isInitialized()) {
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destination->zero();
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return;
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}
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bool channelCountMatches = source->numberOfChannels() == destination->numberOfChannels() && source->numberOfChannels() == m_kernels.size();
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ASSERT(channelCountMatches);
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if (!channelCountMatches)
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return;
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// The audio thread can't block on this lock, so we use tryLock() instead.
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if (!m_processLock.tryLock()) {
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// Too bad - tryLock() failed. We must be in the middle of a setCurve() call.
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destination->zero();
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return;
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}
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Locker locker { AdoptLock, m_processLock };
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// For each channel of our input, process using the corresponding WaveShaperDSPKernel into the output channel.
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for (size_t i = 0; i < m_kernels.size(); ++i)
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static_cast<WaveShaperDSPKernel&>(*m_kernels[i]).process(source->channel(i)->data(), destination->channel(i)->mutableData(), framesToProcess);
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}
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} // namespace WebCore
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#endif // ENABLE(WEB_AUDIO)
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