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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 * 1. Redistributions of source code must retain the above copyright | 7 * 1. Redistributions of source code must retain the above copyright |
8 * notice, this list of conditions and the following disclaimer. | 8 * notice, this list of conditions and the following disclaimer. |
9 * 2. Redistributions in binary form must reproduce the above copyright | 9 * 2. Redistributions in binary form must reproduce the above copyright |
10 * notice, this list of conditions and the following disclaimer in the | 10 * notice, this list of conditions and the following disclaimer in the |
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26 | 26 |
27 #if ENABLE(WEB_AUDIO) | 27 #if ENABLE(WEB_AUDIO) |
28 | 28 |
29 #include "platform/audio/AudioResamplerKernel.h" | 29 #include "platform/audio/AudioResamplerKernel.h" |
30 | 30 |
31 #include <algorithm> | 31 #include <algorithm> |
32 #include "platform/audio/AudioResampler.h" | 32 #include "platform/audio/AudioResampler.h" |
33 | 33 |
34 using namespace std; | 34 using namespace std; |
35 | 35 |
36 namespace WebCore { | 36 namespace blink { |
37 | 37 |
38 const size_t AudioResamplerKernel::MaxFramesToProcess = 128; | 38 const size_t AudioResamplerKernel::MaxFramesToProcess = 128; |
39 | 39 |
40 AudioResamplerKernel::AudioResamplerKernel(AudioResampler* resampler) | 40 AudioResamplerKernel::AudioResamplerKernel(AudioResampler* resampler) |
41 : m_resampler(resampler) | 41 : m_resampler(resampler) |
42 // The buffer size must be large enough to hold up to two extra sample frame
s for the linear interpolation. | 42 // The buffer size must be large enough to hold up to two extra sample frame
s for the linear interpolation. |
43 , m_sourceBuffer(2 + static_cast<int>(MaxFramesToProcess * AudioResampler::M
axRate)) | 43 , m_sourceBuffer(2 + static_cast<int>(MaxFramesToProcess * AudioResampler::M
axRate)) |
44 , m_virtualReadIndex(0.0) | 44 , m_virtualReadIndex(0.0) |
45 , m_fillIndex(0) | 45 , m_fillIndex(0) |
46 { | 46 { |
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131 m_fillIndex = 0; | 131 m_fillIndex = 0; |
132 m_lastValues[0] = 0.0f; | 132 m_lastValues[0] = 0.0f; |
133 m_lastValues[1] = 0.0f; | 133 m_lastValues[1] = 0.0f; |
134 } | 134 } |
135 | 135 |
136 double AudioResamplerKernel::rate() const | 136 double AudioResamplerKernel::rate() const |
137 { | 137 { |
138 return m_resampler->rate(); | 138 return m_resampler->rate(); |
139 } | 139 } |
140 | 140 |
141 } // namespace WebCore | 141 } // namespace blink |
142 | 142 |
143 #endif // ENABLE(WEB_AUDIO) | 143 #endif // ENABLE(WEB_AUDIO) |
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