| /* |
| * 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/WaveShaperDSPKernel.h" |
| #include "modules/webaudio/WaveShaperProcessor.h" |
| #include "wtf/PtrUtil.h" |
| #include <memory> |
| |
| namespace blink { |
| |
| WaveShaperProcessor::WaveShaperProcessor(float sampleRate, |
| size_t numberOfChannels) |
| : AudioDSPKernelProcessor(sampleRate, numberOfChannels), |
| m_oversample(OverSampleNone) {} |
| |
| WaveShaperProcessor::~WaveShaperProcessor() { |
| if (isInitialized()) |
| uninitialize(); |
| } |
| |
| std::unique_ptr<AudioDSPKernel> WaveShaperProcessor::createKernel() { |
| return wrapUnique(new WaveShaperDSPKernel(this)); |
| } |
| |
| void WaveShaperProcessor::setCurve(const float* curveData, |
| unsigned curveLength) { |
| DCHECK(isMainThread()); |
| |
| // This synchronizes with process(). |
| MutexLocker processLocker(m_processLock); |
| |
| if (curveLength == 0 || !curveData) { |
| m_curve = nullptr; |
| return; |
| } |
| |
| // Copy the curve data, if any, to our internal buffer. |
| m_curve = wrapUnique(new Vector<float>(curveLength)); |
| memcpy(m_curve->data(), curveData, sizeof(float) * curveLength); |
| } |
| |
| void WaveShaperProcessor::setOversample(OverSampleType oversample) { |
| // This synchronizes with process(). |
| MutexLocker processLocker(m_processLock); |
| |
| m_oversample = oversample; |
| |
| if (oversample != OverSampleNone) { |
| for (unsigned i = 0; i < m_kernels.size(); ++i) { |
| WaveShaperDSPKernel* kernel = |
| static_cast<WaveShaperDSPKernel*>(m_kernels[i].get()); |
| kernel->lazyInitializeOversampling(); |
| } |
| } |
| } |
| |
| 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(); |
| DCHECK(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 blink |