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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 14 matching lines...) Expand all Loading... |
| 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | 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. | 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 */ | 27 */ |
| 28 | 28 |
| 29 #ifndef ReverbAccumulationBuffer_h | 29 #ifndef ReverbAccumulationBuffer_h |
| 30 #define ReverbAccumulationBuffer_h | 30 #define ReverbAccumulationBuffer_h |
| 31 | 31 |
| 32 #include "platform/PlatformExport.h" | 32 #include "platform/PlatformExport.h" |
| 33 #include "platform/audio/AudioArray.h" | 33 #include "platform/audio/AudioArray.h" |
| 34 | 34 |
| 35 namespace WebCore { | 35 namespace blink { |
| 36 | 36 |
| 37 // ReverbAccumulationBuffer is a circular delay buffer with one client reading f
rom it and multiple clients | 37 // ReverbAccumulationBuffer is a circular delay buffer with one client reading f
rom it and multiple clients |
| 38 // writing/accumulating to it at different delay offsets from the read position.
The read operation will zero the memory | 38 // writing/accumulating to it at different delay offsets from the read position.
The read operation will zero the memory |
| 39 // just read from the buffer, so it will be ready for accumulation the next time
around. | 39 // just read from the buffer, so it will be ready for accumulation the next time
around. |
| 40 class PLATFORM_EXPORT ReverbAccumulationBuffer { | 40 class PLATFORM_EXPORT ReverbAccumulationBuffer { |
| 41 public: | 41 public: |
| 42 ReverbAccumulationBuffer(size_t length); | 42 ReverbAccumulationBuffer(size_t length); |
| 43 | 43 |
| 44 // This will read from, then clear-out numberOfFrames | 44 // This will read from, then clear-out numberOfFrames |
| 45 void readAndClear(float* destination, size_t numberOfFrames); | 45 void readAndClear(float* destination, size_t numberOfFrames); |
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| 56 size_t readTimeFrame() const { return m_readTimeFrame; } | 56 size_t readTimeFrame() const { return m_readTimeFrame; } |
| 57 | 57 |
| 58 void reset(); | 58 void reset(); |
| 59 | 59 |
| 60 private: | 60 private: |
| 61 AudioFloatArray m_buffer; | 61 AudioFloatArray m_buffer; |
| 62 size_t m_readIndex; | 62 size_t m_readIndex; |
| 63 size_t m_readTimeFrame; // for debugging (frame on continuous timeline) | 63 size_t m_readTimeFrame; // for debugging (frame on continuous timeline) |
| 64 }; | 64 }; |
| 65 | 65 |
| 66 } // namespace WebCore | 66 } // namespace blink |
| 67 | 67 |
| 68 #endif // ReverbAccumulationBuffer_h | 68 #endif // ReverbAccumulationBuffer_h |
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