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/*
* Copyright (C) 2010 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.
* 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY APPLE 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 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.
*/
#ifndef ReverbConvolver_h
#define ReverbConvolver_h
#include "ReverbAccumulationBuffer.h"
#include "ReverbInputBuffer.h"
#include "nsAutoPtr.h"
#include "mozilla/MemoryReporting.h"
#ifdef LOG
#undef LOG
#endif
#include "base/condition_variable.h"
#include "base/lock.h"
#include "base/thread.h"
namespace WebCore {
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);
~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<nsAutoPtr<ReverbConvolverStage> > m_stages;
nsTArray<nsAutoPtr<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;
Lock m_backgroundThreadLock;
ConditionVariable m_backgroundThreadCondition;
bool m_useBackgroundThreads;
bool m_wantsToExit;
bool m_moreInputBuffered;
};
} // namespace WebCore
#endif // ReverbConvolver_h
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