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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 #include "platform/audio/AudioResampler.h" | 26 #include "platform/audio/AudioResampler.h" |
27 #include "wtf/MathExtras.h" | 27 #include "wtf/MathExtras.h" |
28 #include "wtf/PtrUtil.h" | 28 #include "wtf/PtrUtil.h" |
29 #include <algorithm> | 29 #include <algorithm> |
30 | 30 |
31 namespace blink { | 31 namespace blink { |
32 | 32 |
33 const double AudioResampler::MaxRate = 8.0; | 33 const double AudioResampler::MaxRate = 8.0; |
34 | 34 |
35 AudioResampler::AudioResampler() : m_rate(1.0) { | 35 AudioResampler::AudioResampler() : m_rate(1.0) { |
36 m_kernels.append(WTF::makeUnique<AudioResamplerKernel>(this)); | 36 m_kernels.push_back(WTF::makeUnique<AudioResamplerKernel>(this)); |
37 m_sourceBus = AudioBus::create(1, 0, false); | 37 m_sourceBus = AudioBus::create(1, 0, false); |
38 } | 38 } |
39 | 39 |
40 AudioResampler::AudioResampler(unsigned numberOfChannels) : m_rate(1.0) { | 40 AudioResampler::AudioResampler(unsigned numberOfChannels) : m_rate(1.0) { |
41 for (unsigned i = 0; i < numberOfChannels; ++i) | 41 for (unsigned i = 0; i < numberOfChannels; ++i) |
42 m_kernels.append(WTF::makeUnique<AudioResamplerKernel>(this)); | 42 m_kernels.push_back(WTF::makeUnique<AudioResamplerKernel>(this)); |
43 | 43 |
44 m_sourceBus = AudioBus::create(numberOfChannels, 0, false); | 44 m_sourceBus = AudioBus::create(numberOfChannels, 0, false); |
45 } | 45 } |
46 | 46 |
47 void AudioResampler::configureChannels(unsigned numberOfChannels) { | 47 void AudioResampler::configureChannels(unsigned numberOfChannels) { |
48 unsigned currentSize = m_kernels.size(); | 48 unsigned currentSize = m_kernels.size(); |
49 if (numberOfChannels == currentSize) | 49 if (numberOfChannels == currentSize) |
50 return; // already setup | 50 return; // already setup |
51 | 51 |
52 // First deal with adding or removing kernels. | 52 // First deal with adding or removing kernels. |
53 if (numberOfChannels > currentSize) { | 53 if (numberOfChannels > currentSize) { |
54 for (unsigned i = currentSize; i < numberOfChannels; ++i) | 54 for (unsigned i = currentSize; i < numberOfChannels; ++i) |
55 m_kernels.append(WTF::makeUnique<AudioResamplerKernel>(this)); | 55 m_kernels.push_back(WTF::makeUnique<AudioResamplerKernel>(this)); |
56 } else | 56 } else |
57 m_kernels.resize(numberOfChannels); | 57 m_kernels.resize(numberOfChannels); |
58 | 58 |
59 // Reconfigure our source bus to the new channel size. | 59 // Reconfigure our source bus to the new channel size. |
60 m_sourceBus = AudioBus::create(numberOfChannels, 0, false); | 60 m_sourceBus = AudioBus::create(numberOfChannels, 0, false); |
61 } | 61 } |
62 | 62 |
63 void AudioResampler::process(AudioSourceProvider* provider, | 63 void AudioResampler::process(AudioSourceProvider* provider, |
64 AudioBus* destinationBus, | 64 AudioBus* destinationBus, |
65 size_t framesToProcess) { | 65 size_t framesToProcess) { |
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110 m_rate = std::min(AudioResampler::MaxRate, rate); | 110 m_rate = std::min(AudioResampler::MaxRate, rate); |
111 } | 111 } |
112 | 112 |
113 void AudioResampler::reset() { | 113 void AudioResampler::reset() { |
114 unsigned numberOfChannels = m_kernels.size(); | 114 unsigned numberOfChannels = m_kernels.size(); |
115 for (unsigned i = 0; i < numberOfChannels; ++i) | 115 for (unsigned i = 0; i < numberOfChannels; ++i) |
116 m_kernels[i]->reset(); | 116 m_kernels[i]->reset(); |
117 } | 117 } |
118 | 118 |
119 } // namespace blink | 119 } // namespace blink |
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