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1 /* | 1 /* |
2 * Copyright (C) 2011 Google Inc. All rights reserved. | 2 * Copyright (C) 2011 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 |
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32 | 32 |
33 #include "platform/audio/DynamicsCompressorKernel.h" | 33 #include "platform/audio/DynamicsCompressorKernel.h" |
34 | 34 |
35 #include <algorithm> | 35 #include <algorithm> |
36 #include "platform/audio/AudioUtilities.h" | 36 #include "platform/audio/AudioUtilities.h" |
37 #include "platform/audio/DenormalDisabler.h" | 37 #include "platform/audio/DenormalDisabler.h" |
38 #include "wtf/MathExtras.h" | 38 #include "wtf/MathExtras.h" |
39 | 39 |
40 using namespace std; | 40 using namespace std; |
41 | 41 |
42 namespace WebCore { | 42 namespace blink { |
43 | 43 |
44 using namespace AudioUtilities; | 44 using namespace AudioUtilities; |
45 | 45 |
46 // Metering hits peaks instantly, but releases this fast (in seconds). | 46 // Metering hits peaks instantly, but releases this fast (in seconds). |
47 const float meteringReleaseTimeConstant = 0.325f; | 47 const float meteringReleaseTimeConstant = 0.325f; |
48 | 48 |
49 const float uninitializedValue = -1; | 49 const float uninitializedValue = -1; |
50 | 50 |
51 DynamicsCompressorKernel::DynamicsCompressorKernel(float sampleRate, unsigned nu
mberOfChannels) | 51 DynamicsCompressorKernel::DynamicsCompressorKernel(float sampleRate, unsigned nu
mberOfChannels) |
52 : m_sampleRate(sampleRate) | 52 : m_sampleRate(sampleRate) |
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467 // Predelay section. | 467 // Predelay section. |
468 for (unsigned i = 0; i < m_preDelayBuffers.size(); ++i) | 468 for (unsigned i = 0; i < m_preDelayBuffers.size(); ++i) |
469 m_preDelayBuffers[i]->zero(); | 469 m_preDelayBuffers[i]->zero(); |
470 | 470 |
471 m_preDelayReadIndex = 0; | 471 m_preDelayReadIndex = 0; |
472 m_preDelayWriteIndex = DefaultPreDelayFrames; | 472 m_preDelayWriteIndex = DefaultPreDelayFrames; |
473 | 473 |
474 m_maxAttackCompressionDiffDb = -1; // uninitialized state | 474 m_maxAttackCompressionDiffDb = -1; // uninitialized state |
475 } | 475 } |
476 | 476 |
477 } // namespace WebCore | 477 } // namespace blink |
478 | 478 |
479 #endif // ENABLE(WEB_AUDIO) | 479 #endif // ENABLE(WEB_AUDIO) |
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