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29 #include "modules/webaudio/WaveShaperProcessor.h"
31 #include "modules/webaudio/WaveShaperDSPKernel.h"
35 WaveShaperProcessor::WaveShaperProcessor(float sampleRate, size_t numberOfChannels)
36 : AudioDSPKernelProcessor(sampleRate, numberOfChannels)
37 , m_oversample(OverSampleNone)
41 WaveShaperProcessor::~WaveShaperProcessor()
47 PassOwnPtr<AudioDSPKernel> WaveShaperProcessor::createKernel()
49 return adoptPtr(new WaveShaperDSPKernel(this));
52 void WaveShaperProcessor::setCurve(DOMFloat32Array* curve)
54 // This synchronizes with process().
55 MutexLocker processLocker(m_processLock);
60 void WaveShaperProcessor::setOversample(OverSampleType oversample)
62 // This synchronizes with process().
63 MutexLocker processLocker(m_processLock);
65 m_oversample = oversample;
67 if (oversample != OverSampleNone) {
68 for (unsigned i = 0; i < m_kernels.size(); ++i) {
69 WaveShaperDSPKernel* kernel = static_cast<WaveShaperDSPKernel*>(m_kernels[i].get());
70 kernel->lazyInitializeOversampling();
75 void WaveShaperProcessor::process(const AudioBus* source, AudioBus* destination, size_t framesToProcess)
77 if (!isInitialized()) {
82 bool channelCountMatches = source->numberOfChannels() == destination->numberOfChannels() && source->numberOfChannels() == m_kernels.size();
83 ASSERT(channelCountMatches);
84 if (!channelCountMatches)
87 // The audio thread can't block on this lock, so we call tryLock() instead.
88 MutexTryLocker tryLocker(m_processLock);
89 if (tryLocker.locked()) {
90 // For each channel of our input, process using the corresponding WaveShaperDSPKernel into the output channel.
91 for (unsigned i = 0; i < m_kernels.size(); ++i)
92 m_kernels[i]->process(source->channel(i)->data(), destination->channel(i)->mutableData(), framesToProcess);
94 // Too bad - the tryLock() failed. We must be in the middle of a setCurve() call.
101 #endif // ENABLE(WEB_AUDIO)