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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 24 matching lines...) Expand all Loading... |
| 35 #include "wtf/Noncopyable.h" | 35 #include "wtf/Noncopyable.h" |
| 36 #include <memory> | 36 #include <memory> |
| 37 | 37 |
| 38 namespace blink { | 38 namespace blink { |
| 39 | 39 |
| 40 class ReverbAccumulationBuffer; | 40 class ReverbAccumulationBuffer; |
| 41 class ReverbConvolver; | 41 class ReverbConvolver; |
| 42 class FFTConvolver; | 42 class FFTConvolver; |
| 43 class DirectConvolver; | 43 class DirectConvolver; |
| 44 | 44 |
| 45 // A ReverbConvolverStage represents the convolution associated with a sub-secti
on of a large impulse response. | 45 // A ReverbConvolverStage represents the convolution associated with a |
| 46 // It incorporates a delay line to account for the offset of the sub-section wit
hin the larger impulse response. | 46 // sub-section of a large impulse response. It incorporates a delay line to |
| 47 // account for the offset of the sub-section within the larger impulse |
| 48 // response. |
| 47 class PLATFORM_EXPORT ReverbConvolverStage { | 49 class PLATFORM_EXPORT ReverbConvolverStage { |
| 48 USING_FAST_MALLOC(ReverbConvolverStage); | 50 USING_FAST_MALLOC(ReverbConvolverStage); |
| 49 WTF_MAKE_NONCOPYABLE(ReverbConvolverStage); | 51 WTF_MAKE_NONCOPYABLE(ReverbConvolverStage); |
| 50 | 52 |
| 51 public: | 53 public: |
| 52 // renderPhase is useful to know so that we can manipulate the pre versus post
delay so that stages will perform | 54 // renderPhase is useful to know so that we can manipulate the pre versus post |
| 53 // their heavy work (FFT processing) on different slices to balance the load i
n a real-time thread. | 55 // delay so that stages will perform their heavy work (FFT processing) on |
| 56 // different slices to balance the load in a real-time thread. |
| 54 ReverbConvolverStage(const float* impulseResponse, | 57 ReverbConvolverStage(const float* impulseResponse, |
| 55 size_t responseLength, | 58 size_t responseLength, |
| 56 size_t reverbTotalLatency, | 59 size_t reverbTotalLatency, |
| 57 size_t stageOffset, | 60 size_t stageOffset, |
| 58 size_t stageLength, | 61 size_t stageLength, |
| 59 size_t fftSize, | 62 size_t fftSize, |
| 60 size_t renderPhase, | 63 size_t renderPhase, |
| 61 size_t renderSliceSize, | 64 size_t renderSliceSize, |
| 62 ReverbAccumulationBuffer*, | 65 ReverbAccumulationBuffer*, |
| 63 bool directMode = false); | 66 bool directMode = false); |
| 64 | 67 |
| 65 // WARNING: framesToProcess must be such that it evenly divides the delay buff
er size (stage_offset). | 68 // WARNING: framesToProcess must be such that it evenly divides the delay |
| 69 // buffer size (stage_offset). |
| 66 void process(const float* source, size_t framesToProcess); | 70 void process(const float* source, size_t framesToProcess); |
| 67 | 71 |
| 68 void processInBackground(ReverbConvolver* convolver, size_t framesToProcess); | 72 void processInBackground(ReverbConvolver* convolver, size_t framesToProcess); |
| 69 | 73 |
| 70 void reset(); | 74 void reset(); |
| 71 | 75 |
| 72 // Useful for background processing | 76 // Useful for background processing |
| 73 int inputReadIndex() const { return m_inputReadIndex; } | 77 int inputReadIndex() const { return m_inputReadIndex; } |
| 74 | 78 |
| 75 private: | 79 private: |
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| 90 AudioFloatArray m_temporaryBuffer; | 94 AudioFloatArray m_temporaryBuffer; |
| 91 | 95 |
| 92 bool m_directMode; | 96 bool m_directMode; |
| 93 std::unique_ptr<AudioFloatArray> m_directKernel; | 97 std::unique_ptr<AudioFloatArray> m_directKernel; |
| 94 std::unique_ptr<DirectConvolver> m_directConvolver; | 98 std::unique_ptr<DirectConvolver> m_directConvolver; |
| 95 }; | 99 }; |
| 96 | 100 |
| 97 } // namespace blink | 101 } // namespace blink |
| 98 | 102 |
| 99 #endif // ReverbConvolverStage_h | 103 #endif // ReverbConvolverStage_h |
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