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| 1 /* | 1 /* |
| 2 * Copyright (C) 2010 Google Inc. All rights reserved. | 2 * Copyright (C) 2010 Google Inc. All rights reserved. |
| 3 * | 3 * |
| 4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
| 5 * modification, are permitted provided that the following conditions | 5 * modification, are permitted provided that the following conditions |
| 6 * are met: | 6 * are met: |
| 7 * | 7 * |
| 8 * 1. Redistributions of source code must retain the above copyright | 8 * 1. Redistributions of source code must retain the above copyright |
| 9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
| 10 * 2. Redistributions in binary form must reproduce the above copyright | 10 * 2. Redistributions in binary form must reproduce the above copyright |
| (...skipping 18 matching lines...) Expand all Loading... |
| 29 #ifndef ReverbConvolver_h | 29 #ifndef ReverbConvolver_h |
| 30 #define ReverbConvolver_h | 30 #define ReverbConvolver_h |
| 31 | 31 |
| 32 #include "platform/audio/AudioArray.h" | 32 #include "platform/audio/AudioArray.h" |
| 33 #include "platform/audio/DirectConvolver.h" | 33 #include "platform/audio/DirectConvolver.h" |
| 34 #include "platform/audio/FFTConvolver.h" | 34 #include "platform/audio/FFTConvolver.h" |
| 35 #include "platform/audio/ReverbAccumulationBuffer.h" | 35 #include "platform/audio/ReverbAccumulationBuffer.h" |
| 36 #include "platform/audio/ReverbConvolverStage.h" | 36 #include "platform/audio/ReverbConvolverStage.h" |
| 37 #include "platform/audio/ReverbInputBuffer.h" | 37 #include "platform/audio/ReverbInputBuffer.h" |
| 38 #include "wtf/Allocator.h" | 38 #include "wtf/Allocator.h" |
| 39 #include "wtf/OwnPtr.h" |
| 39 #include "wtf/Vector.h" | 40 #include "wtf/Vector.h" |
| 40 #include <memory> | |
| 41 | 41 |
| 42 namespace blink { | 42 namespace blink { |
| 43 | 43 |
| 44 class AudioChannel; | 44 class AudioChannel; |
| 45 class WebThread; | 45 class WebThread; |
| 46 | 46 |
| 47 class PLATFORM_EXPORT ReverbConvolver { | 47 class PLATFORM_EXPORT ReverbConvolver { |
| 48 USING_FAST_MALLOC(ReverbConvolver); | 48 USING_FAST_MALLOC(ReverbConvolver); |
| 49 WTF_MAKE_NONCOPYABLE(ReverbConvolver); | 49 WTF_MAKE_NONCOPYABLE(ReverbConvolver); |
| 50 public: | 50 public: |
| 51 // maxFFTSize can be adjusted (from say 2048 to 32768) depending on how much
precision is necessary. | 51 // maxFFTSize can be adjusted (from say 2048 to 32768) depending on how much
precision is necessary. |
| 52 // For certain tweaky de-convolving applications the phase errors add up qui
ckly and lead to non-sensical results with | 52 // For certain tweaky de-convolving applications the phase errors add up qui
ckly and lead to non-sensical results with |
| 53 // larger FFT sizes and single-precision floats. In these cases 2048 is a g
ood size. | 53 // larger FFT sizes and single-precision floats. In these cases 2048 is a g
ood size. |
| 54 // If not doing multi-threaded convolution, then should not go > 8192. | 54 // If not doing multi-threaded convolution, then should not go > 8192. |
| 55 ReverbConvolver(AudioChannel* impulseResponse, size_t renderSliceSize, size_
t maxFFTSize, size_t convolverRenderPhase, bool useBackgroundThreads); | 55 ReverbConvolver(AudioChannel* impulseResponse, size_t renderSliceSize, size_
t maxFFTSize, size_t convolverRenderPhase, bool useBackgroundThreads); |
| 56 ~ReverbConvolver(); | 56 ~ReverbConvolver(); |
| 57 | 57 |
| 58 void process(const AudioChannel* sourceChannel, AudioChannel* destinationCha
nnel, size_t framesToProcess); | 58 void process(const AudioChannel* sourceChannel, AudioChannel* destinationCha
nnel, size_t framesToProcess); |
| 59 void reset(); | 59 void reset(); |
| 60 | 60 |
| 61 ReverbInputBuffer* inputBuffer() { return &m_inputBuffer; } | 61 ReverbInputBuffer* inputBuffer() { return &m_inputBuffer; } |
| 62 | 62 |
| 63 size_t latencyFrames() const; | 63 size_t latencyFrames() const; |
| 64 private: | 64 private: |
| 65 void processInBackground(); | 65 void processInBackground(); |
| 66 | 66 |
| 67 Vector<std::unique_ptr<ReverbConvolverStage>> m_stages; | 67 Vector<OwnPtr<ReverbConvolverStage>> m_stages; |
| 68 Vector<std::unique_ptr<ReverbConvolverStage>> m_backgroundStages; | 68 Vector<OwnPtr<ReverbConvolverStage>> m_backgroundStages; |
| 69 size_t m_impulseResponseLength; | 69 size_t m_impulseResponseLength; |
| 70 | 70 |
| 71 ReverbAccumulationBuffer m_accumulationBuffer; | 71 ReverbAccumulationBuffer m_accumulationBuffer; |
| 72 | 72 |
| 73 // One or more background threads read from this input buffer which is fed f
rom the realtime thread. | 73 // One or more background threads read from this input buffer which is fed f
rom the realtime thread. |
| 74 ReverbInputBuffer m_inputBuffer; | 74 ReverbInputBuffer m_inputBuffer; |
| 75 | 75 |
| 76 // First stage will be of size m_minFFTSize. Each next stage will be twice
as big until we hit m_maxFFTSize. | 76 // First stage will be of size m_minFFTSize. Each next stage will be twice
as big until we hit m_maxFFTSize. |
| 77 size_t m_minFFTSize; | 77 size_t m_minFFTSize; |
| 78 size_t m_maxFFTSize; | 78 size_t m_maxFFTSize; |
| 79 | 79 |
| 80 // But don't exceed this size in the real-time thread (if we're doing backgr
ound processing). | 80 // But don't exceed this size in the real-time thread (if we're doing backgr
ound processing). |
| 81 size_t m_maxRealtimeFFTSize; | 81 size_t m_maxRealtimeFFTSize; |
| 82 | 82 |
| 83 // Background thread and synchronization | 83 // Background thread and synchronization |
| 84 std::unique_ptr<WebThread> m_backgroundThread; | 84 OwnPtr<WebThread> m_backgroundThread; |
| 85 }; | 85 }; |
| 86 | 86 |
| 87 } // namespace blink | 87 } // namespace blink |
| 88 | 88 |
| 89 #endif // ReverbConvolver_h | 89 #endif // ReverbConvolver_h |
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