1 /* 2 * Copyright (C) 2010 Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of 14 * its contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY 18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #ifndef ReverbConvolver_h 30 #define ReverbConvolver_h 31 32 #include "ReverbAccumulationBuffer.h" 33 #include "ReverbInputBuffer.h" 34 #include "mozilla/MemoryReporting.h" 35 #include "mozilla/Monitor.h" 36 #include "mozilla/UniquePtr.h" 37 #ifdef LOG 38 # undef LOG 39 #endif 40 #include "base/thread.h" 41 #include <atomic> 42 43 namespace WebCore { 44 45 using mozilla::UniquePtr; 46 47 class ReverbConvolverStage; 48 49 class ReverbConvolver { 50 public: 51 // maxFFTSize can be adjusted (from say 2048 to 32768) depending on how much 52 // precision is necessary. For certain tweaky de-convolving applications the 53 // phase errors add up quickly and lead to non-sensical results with larger 54 // FFT sizes and single-precision floats. In these cases 2048 is a good size. 55 // If not doing multi-threaded convolution, then should not go > 8192. 56 ReverbConvolver(const float* impulseResponseData, 57 size_t impulseResponseLength, size_t maxFFTSize, 58 size_t convolverRenderPhase, bool useBackgroundThreads, 59 bool* aAllocationFailure); 60 ~ReverbConvolver(); 61 62 void process(const float* sourceChannelData, float* destinationChannelData); 63 impulseResponseLength()64 size_t impulseResponseLength() const { return m_impulseResponseLength; } 65 inputBuffer()66 ReverbInputBuffer* inputBuffer() { return &m_inputBuffer; } 67 useBackgroundThreads()68 bool useBackgroundThreads() const { return m_useBackgroundThreads; } 69 void backgroundThreadEntry(); 70 71 size_t sizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const; 72 73 private: 74 nsTArray<UniquePtr<ReverbConvolverStage> > m_stages; 75 nsTArray<UniquePtr<ReverbConvolverStage> > m_backgroundStages; 76 size_t m_impulseResponseLength; 77 78 ReverbAccumulationBuffer m_accumulationBuffer; 79 80 // One or more background threads read from this input buffer which is fed 81 // from the realtime thread. 82 ReverbInputBuffer m_inputBuffer; 83 84 // Background thread and synchronization 85 base::Thread m_backgroundThread; 86 mozilla::Monitor m_backgroundThreadMonitor; 87 bool m_useBackgroundThreads; 88 std::atomic<bool> m_wantsToExit; 89 std::atomic<bool> m_moreInputBuffered; 90 }; 91 92 } // namespace WebCore 93 94 #endif // ReverbConvolver_h 95