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| 1 /* | 1 /* |
| 2 * Copyright (C) 2013 Google Inc. All rights reserved. | 2 * Copyright (C) 2013 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 are | 5 * modification, are permitted provided that the following conditions are |
| 6 * met: | 6 * met: |
| 7 * | 7 * |
| 8 * * Redistributions of source code must retain the above copyright | 8 * * 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 * * Redistributions in binary form must reproduce the above | 10 * * Redistributions in binary form must reproduce the above |
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| 29 */ | 29 */ |
| 30 | 30 |
| 31 #include "config.h" | 31 #include "config.h" |
| 32 | 32 |
| 33 #if ENABLE(WEB_AUDIO) | 33 #if ENABLE(WEB_AUDIO) |
| 34 | 34 |
| 35 #include "platform/audio/UpSampler.h" | 35 #include "platform/audio/UpSampler.h" |
| 36 | 36 |
| 37 #include "wtf/MathExtras.h" | 37 #include "wtf/MathExtras.h" |
| 38 | 38 |
| 39 namespace WebCore { | 39 namespace blink { |
| 40 | 40 |
| 41 UpSampler::UpSampler(size_t inputBlockSize) | 41 UpSampler::UpSampler(size_t inputBlockSize) |
| 42 : m_inputBlockSize(inputBlockSize) | 42 : m_inputBlockSize(inputBlockSize) |
| 43 , m_kernel(DefaultKernelSize) | 43 , m_kernel(DefaultKernelSize) |
| 44 , m_convolver(inputBlockSize) | 44 , m_convolver(inputBlockSize) |
| 45 , m_tempBuffer(inputBlockSize) | 45 , m_tempBuffer(inputBlockSize) |
| 46 , m_inputBuffer(inputBlockSize * 2) | 46 , m_inputBuffer(inputBlockSize * 2) |
| 47 { | 47 { |
| 48 initializeKernel(); | 48 initializeKernel(); |
| 49 } | 49 } |
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| 122 m_convolver.reset(); | 122 m_convolver.reset(); |
| 123 m_inputBuffer.zero(); | 123 m_inputBuffer.zero(); |
| 124 } | 124 } |
| 125 | 125 |
| 126 size_t UpSampler::latencyFrames() const | 126 size_t UpSampler::latencyFrames() const |
| 127 { | 127 { |
| 128 // Divide by two since this is a linear phase kernel and the delay is at the
center of the kernel. | 128 // Divide by two since this is a linear phase kernel and the delay is at the
center of the kernel. |
| 129 return m_kernel.size() / 2; | 129 return m_kernel.size() / 2; |
| 130 } | 130 } |
| 131 | 131 |
| 132 } // namespace WebCore | 132 } // namespace blink |
| 133 | 133 |
| 134 #endif // ENABLE(WEB_AUDIO) | 134 #endif // ENABLE(WEB_AUDIO) |
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