/*
* Copyright (C) 2010 Google Inc. All rights reserved.
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* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
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* its contributors may be used to endorse or promote products derived
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*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
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#ifndef ReverbConvolver_h
#define ReverbConvolver_h
#include "ReverbAccumulationBuffer.h"
#include "ReverbInputBuffer.h"
#include "mozilla/MemoryReporting.h"
#include "mozilla/Monitor.h"
#include "mozilla/UniquePtr.h"
#ifdef LOG
# undef LOG
#endif
#include "base/thread.h"
#include <atomic>
namespace WebCore {
using mozilla::UniquePtr;
class ReverbConvolverStage;
class ReverbConvolver {
public:
// maxFFTSize can be adjusted (from say 2048 to 32768) depending on how much
// precision is necessary. For certain tweaky de-convolving applications the
// phase errors add up quickly and lead to non-sensical results with larger
// FFT sizes and single-precision floats. In these cases 2048 is a good size.
// If not doing multi-threaded convolution, then should not go > 8192.
ReverbConvolver(
const float* impulseResponseData,
size_t impulseResponseLength, size_t maxFFTSize,
size_t convolverRenderPhase,
bool useBackgroundThreads,
bool* aAllocationFailure);
~ReverbConvolver();
void process(
const float* sourceChannelData,
float* destinationChannelData);
size_t impulseResponseLength()
const {
return m_impulseResponseLength; }
ReverbInputBuffer* inputBuffer() {
return &m_inputBuffer; }
bool useBackgroundThreads()
const {
return m_useBackgroundThreads; }
void backgroundThreadEntry();
size_t sizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf)
const;
private:
nsTArray<UniquePtr<ReverbConvolverStage> > m_stages;
nsTArray<UniquePtr<ReverbConvolverStage> > m_backgroundStages;
size_t m_impulseResponseLength;
ReverbAccumulationBuffer m_accumulationBuffer;
// One or more background threads read from this input buffer which is fed
// from the realtime thread.
ReverbInputBuffer m_inputBuffer;
// Background thread and synchronization
base::Thread m_backgroundThread;
mozilla::Monitor m_backgroundThreadMonitor MOZ_UNANNOTATED;
bool m_useBackgroundThreads;
std::atomic<
bool> m_wantsToExit;
std::atomic<
bool> m_moreInputBuffered;
};
}
// namespace WebCore
#endif // ReverbConvolver_h
