/* * 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 "WaveShaperProcessor.h" #include "WaveShaperDSPKernel.h" namespace WebCore { WaveShaperProcessor::WaveShaperProcessor(float sampleRate, size_t numberOfChannels) : AudioDSPKernelProcessor(sampleRate, numberOfChannels) { } WaveShaperProcessor::~WaveShaperProcessor() { if (isInitialized()) uninitialize(); } PassOwnPtr<AudioDSPKernel> WaveShaperProcessor::createKernel() { return adoptPtr(new WaveShaperDSPKernel(this)); } void WaveShaperProcessor::setCurve(Float32Array* curve) { // This synchronizes with process(). MutexLocker processLocker(m_processLock); m_curve = curve; } void WaveShaperProcessor::process(const AudioBus* source, AudioBus* destination, size_t framesToProcess) { if (!isInitialized()) { destination->zero(); return; } bool channelCountMatches = source->numberOfChannels() == destination->numberOfChannels() && source->numberOfChannels() == m_kernels.size(); ASSERT(channelCountMatches); if (!channelCountMatches) return; // The audio thread can't block on this lock, so we call tryLock() instead. MutexTryLocker tryLocker(m_processLock); if (tryLocker.locked()) { // For each channel of our input, process using the corresponding WaveShaperDSPKernel into the output channel. for (unsigned i = 0; i < m_kernels.size(); ++i) m_kernels[i]->process(source->channel(i)->data(), destination->channel(i)->mutableData(), framesToProcess); } else { // Too bad - the tryLock() failed. We must be in the middle of a setCurve() call. destination->zero(); } } } // namespace WebCore #endif // ENABLE(WEB_AUDIO)