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Side by Side Diff: third_party/WebKit/Source/platform/audio/DownSampler.cpp

Issue 2387263004: Manually remove many instances of a comma quirk arising from the reformat. (Closed)
Patch Set: merge with master; thakis nit Created 4 years, 2 months ago
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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 "platform/audio/DownSampler.h" 31 #include "platform/audio/DownSampler.h"
32 #include "wtf/MathExtras.h" 32 #include "wtf/MathExtras.h"
33 33
34 namespace blink { 34 namespace blink {
35 35
36 DownSampler::DownSampler(size_t inputBlockSize) 36 DownSampler::DownSampler(size_t inputBlockSize)
37 : m_inputBlockSize(inputBlockSize), 37 : m_inputBlockSize(inputBlockSize),
38 m_reducedKernel(DefaultKernelSize / 2), 38 m_reducedKernel(DefaultKernelSize / 2),
39 m_convolver(inputBlockSize / 2) // runs at 1/2 source sample-rate 39 m_convolver(inputBlockSize / 2), // runs at 1/2 source sample-rate
40 ,
41 m_tempBuffer(inputBlockSize / 2), 40 m_tempBuffer(inputBlockSize / 2),
42 m_inputBuffer(inputBlockSize * 2) { 41 m_inputBuffer(inputBlockSize * 2) {
43 initializeKernel(); 42 initializeKernel();
44 } 43 }
45 44
46 void DownSampler::initializeKernel() { 45 void DownSampler::initializeKernel() {
47 // Blackman window parameters. 46 // Blackman window parameters.
48 double alpha = 0.16; 47 double alpha = 0.16;
49 double a0 = 0.5 * (1.0 - alpha); 48 double a0 = 0.5 * (1.0 - alpha);
50 double a1 = 0.5; 49 double a1 = 0.5;
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140 m_inputBuffer.zero(); 139 m_inputBuffer.zero();
141 } 140 }
142 141
143 size_t DownSampler::latencyFrames() const { 142 size_t DownSampler::latencyFrames() const {
144 // Divide by two since this is a linear phase kernel and the delay is at the 143 // Divide by two since this is a linear phase kernel and the delay is at the
145 // center of the kernel. 144 // center of the kernel.
146 return m_reducedKernel.size() / 2; 145 return m_reducedKernel.size() / 2;
147 } 146 }
148 147
149 } // namespace blink 148 } // namespace blink
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