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comparison: content/media/webaudio/blink/ReverbConvolver.h
content/media/webaudio/blink/ReverbConvolver.h
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| 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 "nsAutoPtr.h" | |
| 35 #include "mozilla/MemoryReporting.h" | |
| 36 #ifdef LOG | |
| 37 #undef LOG | |
| 38 #endif | |
| 39 #include "base/condition_variable.h" | |
| 40 #include "base/lock.h" | |
| 41 #include "base/thread.h" | |
| 42 | |
| 43 namespace WebCore { | |
| 44 | |
| 45 class ReverbConvolverStage; | |
| 46 | |
| 47 class ReverbConvolver { | |
| 48 public: | |
| 49 // maxFFTSize can be adjusted (from say 2048 to 32768) depending on how much precision is necessary. | |
| 50 // For certain tweaky de-convolving applications the phase errors add up quickly and lead to non-sensical results with | |
| 51 // larger FFT sizes and single-precision floats. In these cases 2048 is a good size. | |
| 52 // If not doing multi-threaded convolution, then should not go > 8192. | |
| 53 ReverbConvolver(const float* impulseResponseData, size_t impulseResponseLength, size_t renderSliceSize, size_t maxFFTSize, size_t convolverRenderPhase, bool useBackgroundThreads); | |
| 54 ~ReverbConvolver(); | |
| 55 | |
| 56 void process(const float* sourceChannelData, size_t sourceChannelLength, | |
| 57 float* destinationChannelData, size_t destinationChannelLength, | |
| 58 size_t framesToProcess); | |
| 59 void reset(); | |
| 60 | |
| 61 size_t impulseResponseLength() const { return m_impulseResponseLength; } | |
| 62 | |
| 63 ReverbInputBuffer* inputBuffer() { return &m_inputBuffer; } | |
| 64 | |
| 65 bool useBackgroundThreads() const { return m_useBackgroundThreads; } | |
| 66 void backgroundThreadEntry(); | |
| 67 | |
| 68 size_t latencyFrames() const; | |
| 69 | |
| 70 size_t sizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const; | |
| 71 private: | |
| 72 nsTArray<nsAutoPtr<ReverbConvolverStage> > m_stages; | |
| 73 nsTArray<nsAutoPtr<ReverbConvolverStage> > m_backgroundStages; | |
| 74 size_t m_impulseResponseLength; | |
| 75 | |
| 76 ReverbAccumulationBuffer m_accumulationBuffer; | |
| 77 | |
| 78 // One or more background threads read from this input buffer which is fed from the realtime thread. | |
| 79 ReverbInputBuffer m_inputBuffer; | |
| 80 | |
| 81 // First stage will be of size m_minFFTSize. Each next stage will be twice as big until we hit m_maxFFTSize. | |
| 82 size_t m_minFFTSize; | |
| 83 size_t m_maxFFTSize; | |
| 84 | |
| 85 // But don't exceed this size in the real-time thread (if we're doing background processing). | |
| 86 size_t m_maxRealtimeFFTSize; | |
| 87 | |
| 88 // Background thread and synchronization | |
| 89 base::Thread m_backgroundThread; | |
| 90 Lock m_backgroundThreadLock; | |
| 91 ConditionVariable m_backgroundThreadCondition; | |
| 92 bool m_useBackgroundThreads; | |
| 93 bool m_wantsToExit; | |
| 94 bool m_moreInputBuffered; | |
| 95 }; | |
| 96 | |
| 97 } // namespace WebCore | |
| 98 | |
| 99 #endif // ReverbConvolver_h |
