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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 |
11 * documentation and/or other materials provided with the distribution. | 11 * documentation and/or other materials provided with the distribution. |
12 * | 12 * |
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND AN
Y | 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND AN
Y |
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
15 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | 15 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
16 * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR AN
Y | 16 * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR AN
Y |
17 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | 17 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
18 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | 18 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
19 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND O
N | 19 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND O
N |
20 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | 20 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | 21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
22 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | 22 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
23 */ | 23 */ |
24 | 24 |
25 #include "platform/audio/AudioResampler.h" | 25 #include "platform/audio/AudioResampler.h" |
| 26 #include "wtf/MathExtras.h" |
| 27 #include "wtf/PtrUtil.h" |
26 #include <algorithm> | 28 #include <algorithm> |
27 #include "wtf/MathExtras.h" | |
28 | 29 |
29 namespace blink { | 30 namespace blink { |
30 | 31 |
31 const double AudioResampler::MaxRate = 8.0; | 32 const double AudioResampler::MaxRate = 8.0; |
32 | 33 |
33 AudioResampler::AudioResampler() | 34 AudioResampler::AudioResampler() |
34 : m_rate(1.0) | 35 : m_rate(1.0) |
35 { | 36 { |
36 m_kernels.append(adoptPtr(new AudioResamplerKernel(this))); | 37 m_kernels.append(wrapUnique(new AudioResamplerKernel(this))); |
37 m_sourceBus = AudioBus::create(1, 0, false); | 38 m_sourceBus = AudioBus::create(1, 0, false); |
38 } | 39 } |
39 | 40 |
40 AudioResampler::AudioResampler(unsigned numberOfChannels) | 41 AudioResampler::AudioResampler(unsigned numberOfChannels) |
41 : m_rate(1.0) | 42 : m_rate(1.0) |
42 { | 43 { |
43 for (unsigned i = 0; i < numberOfChannels; ++i) | 44 for (unsigned i = 0; i < numberOfChannels; ++i) |
44 m_kernels.append(adoptPtr(new AudioResamplerKernel(this))); | 45 m_kernels.append(wrapUnique(new AudioResamplerKernel(this))); |
45 | 46 |
46 m_sourceBus = AudioBus::create(numberOfChannels, 0, false); | 47 m_sourceBus = AudioBus::create(numberOfChannels, 0, false); |
47 } | 48 } |
48 | 49 |
49 void AudioResampler::configureChannels(unsigned numberOfChannels) | 50 void AudioResampler::configureChannels(unsigned numberOfChannels) |
50 { | 51 { |
51 unsigned currentSize = m_kernels.size(); | 52 unsigned currentSize = m_kernels.size(); |
52 if (numberOfChannels == currentSize) | 53 if (numberOfChannels == currentSize) |
53 return; // already setup | 54 return; // already setup |
54 | 55 |
55 // First deal with adding or removing kernels. | 56 // First deal with adding or removing kernels. |
56 if (numberOfChannels > currentSize) { | 57 if (numberOfChannels > currentSize) { |
57 for (unsigned i = currentSize; i < numberOfChannels; ++i) | 58 for (unsigned i = currentSize; i < numberOfChannels; ++i) |
58 m_kernels.append(adoptPtr(new AudioResamplerKernel(this))); | 59 m_kernels.append(wrapUnique(new AudioResamplerKernel(this))); |
59 } else | 60 } else |
60 m_kernels.resize(numberOfChannels); | 61 m_kernels.resize(numberOfChannels); |
61 | 62 |
62 // Reconfigure our source bus to the new channel size. | 63 // Reconfigure our source bus to the new channel size. |
63 m_sourceBus = AudioBus::create(numberOfChannels, 0, false); | 64 m_sourceBus = AudioBus::create(numberOfChannels, 0, false); |
64 } | 65 } |
65 | 66 |
66 void AudioResampler::process(AudioSourceProvider* provider, AudioBus* destinatio
nBus, size_t framesToProcess) | 67 void AudioResampler::process(AudioSourceProvider* provider, AudioBus* destinatio
nBus, size_t framesToProcess) |
67 { | 68 { |
68 ASSERT(provider); | 69 ASSERT(provider); |
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110 | 111 |
111 void AudioResampler::reset() | 112 void AudioResampler::reset() |
112 { | 113 { |
113 unsigned numberOfChannels = m_kernels.size(); | 114 unsigned numberOfChannels = m_kernels.size(); |
114 for (unsigned i = 0; i < numberOfChannels; ++i) | 115 for (unsigned i = 0; i < numberOfChannels; ++i) |
115 m_kernels[i]->reset(); | 116 m_kernels[i]->reset(); |
116 } | 117 } |
117 | 118 |
118 } // namespace blink | 119 } // namespace blink |
119 | 120 |
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