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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 |
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88 for (unsigned i = truncatedResponseLength - numberOfFadeOutFrames; | 88 for (unsigned i = truncatedResponseLength - numberOfFadeOutFrames; |
89 i < truncatedResponseLength; ++i) { | 89 i < truncatedResponseLength; ++i) { |
90 float x = 1.0f - | 90 float x = 1.0f - |
91 static_cast<float>( | 91 static_cast<float>( |
92 i - (truncatedResponseLength - numberOfFadeOutFrames)) / | 92 i - (truncatedResponseLength - numberOfFadeOutFrames)) / |
93 numberOfFadeOutFrames; | 93 numberOfFadeOutFrames; |
94 impulseResponse[i] *= x; | 94 impulseResponse[i] *= x; |
95 } | 95 } |
96 } | 96 } |
97 | 97 |
98 m_fftFrame = makeUnique<FFTFrame>(fftSize); | 98 m_fftFrame = WTF::makeUnique<FFTFrame>(fftSize); |
99 m_fftFrame->doPaddedFFT(impulseResponse, truncatedResponseLength); | 99 m_fftFrame->doPaddedFFT(impulseResponse, truncatedResponseLength); |
100 } | 100 } |
101 | 101 |
102 std::unique_ptr<AudioChannel> HRTFKernel::createImpulseResponse() { | 102 std::unique_ptr<AudioChannel> HRTFKernel::createImpulseResponse() { |
103 std::unique_ptr<AudioChannel> channel = | 103 std::unique_ptr<AudioChannel> channel = |
104 wrapUnique(new AudioChannel(fftSize())); | 104 WTF::wrapUnique(new AudioChannel(fftSize())); |
105 FFTFrame fftFrame(*m_fftFrame); | 105 FFTFrame fftFrame(*m_fftFrame); |
106 | 106 |
107 // Add leading delay back in. | 107 // Add leading delay back in. |
108 fftFrame.addConstantGroupDelay(m_frameDelay); | 108 fftFrame.addConstantGroupDelay(m_frameDelay); |
109 fftFrame.doInverseFFT(channel->mutableData()); | 109 fftFrame.doInverseFFT(channel->mutableData()); |
110 | 110 |
111 return channel; | 111 return channel; |
112 } | 112 } |
113 | 113 |
114 // Interpolates two kernels with x: 0 -> 1 and returns the result. | 114 // Interpolates two kernels with x: 0 -> 1 and returns the result. |
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133 (1 - x) * kernel1->frameDelay() + x * kernel2->frameDelay(); | 133 (1 - x) * kernel1->frameDelay() + x * kernel2->frameDelay(); |
134 | 134 |
135 std::unique_ptr<FFTFrame> interpolatedFrame = | 135 std::unique_ptr<FFTFrame> interpolatedFrame = |
136 FFTFrame::createInterpolatedFrame(*kernel1->fftFrame(), | 136 FFTFrame::createInterpolatedFrame(*kernel1->fftFrame(), |
137 *kernel2->fftFrame(), x); | 137 *kernel2->fftFrame(), x); |
138 return HRTFKernel::create(std::move(interpolatedFrame), frameDelay, | 138 return HRTFKernel::create(std::move(interpolatedFrame), frameDelay, |
139 sampleRate1); | 139 sampleRate1); |
140 } | 140 } |
141 | 141 |
142 } // namespace blink | 142 } // namespace blink |
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