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100 lines
4.0 KiB
C++
100 lines
4.0 KiB
C++
/*
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* Copyright (C) 2010 Google Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
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* its contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef ReverbConvolver_h
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#define ReverbConvolver_h
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#include "ReverbAccumulationBuffer.h"
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#include "ReverbInputBuffer.h"
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#include "nsAutoPtr.h"
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#include "mozilla/MemoryReporting.h"
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#ifdef LOG
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#undef LOG
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#endif
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#include "base/condition_variable.h"
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#include "base/lock.h"
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#include "base/thread.h"
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namespace WebCore {
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class ReverbConvolverStage;
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class ReverbConvolver {
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public:
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// maxFFTSize can be adjusted (from say 2048 to 32768) depending on how much precision is necessary.
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// For certain tweaky de-convolving applications the phase errors add up quickly and lead to non-sensical results with
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// larger FFT sizes and single-precision floats. In these cases 2048 is a good size.
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// If not doing multi-threaded convolution, then should not go > 8192.
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ReverbConvolver(const float* impulseResponseData, size_t impulseResponseLength, size_t renderSliceSize, size_t maxFFTSize, size_t convolverRenderPhase, bool useBackgroundThreads);
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~ReverbConvolver();
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void process(const float* sourceChannelData, size_t sourceChannelLength,
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float* destinationChannelData, size_t destinationChannelLength,
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size_t framesToProcess);
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void reset();
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size_t impulseResponseLength() const { return m_impulseResponseLength; }
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ReverbInputBuffer* inputBuffer() { return &m_inputBuffer; }
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bool useBackgroundThreads() const { return m_useBackgroundThreads; }
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void backgroundThreadEntry();
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size_t latencyFrames() const;
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size_t sizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
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private:
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nsTArray<nsAutoPtr<ReverbConvolverStage> > m_stages;
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nsTArray<nsAutoPtr<ReverbConvolverStage> > m_backgroundStages;
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size_t m_impulseResponseLength;
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ReverbAccumulationBuffer m_accumulationBuffer;
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// One or more background threads read from this input buffer which is fed from the realtime thread.
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ReverbInputBuffer m_inputBuffer;
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// First stage will be of size m_minFFTSize. Each next stage will be twice as big until we hit m_maxFFTSize.
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size_t m_minFFTSize;
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size_t m_maxFFTSize;
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// But don't exceed this size in the real-time thread (if we're doing background processing).
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size_t m_maxRealtimeFFTSize;
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// Background thread and synchronization
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base::Thread m_backgroundThread;
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Lock m_backgroundThreadLock;
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ConditionVariable m_backgroundThreadCondition;
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bool m_useBackgroundThreads;
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bool m_wantsToExit;
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bool m_moreInputBuffered;
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};
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} // namespace WebCore
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#endif // ReverbConvolver_h
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