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| 1 /* | 1 /* |
| 2 * Copyright (C) 2012, Google Inc. All rights reserved. | 2 * Copyright (C) 2012, 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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| 103 return; | 103 return; |
| 104 } | 104 } |
| 105 | 105 |
| 106 if (!getMediaStream() || | 106 if (!getMediaStream() || |
| 107 m_sourceNumberOfChannels != outputBus->numberOfChannels()) { | 107 m_sourceNumberOfChannels != outputBus->numberOfChannels()) { |
| 108 outputBus->zero(); | 108 outputBus->zero(); |
| 109 return; | 109 return; |
| 110 } | 110 } |
| 111 | 111 |
| 112 // Use a tryLock() to avoid contention in the real-time audio thread. | 112 // Use a tryLock() to avoid contention in the real-time audio thread. |
| 113 // If we fail to acquire the lock then the MediaStream must be in the middle o
f | 113 // If we fail to acquire the lock then the MediaStream must be in the middle |
| 114 // a format change, so we output silence in this case. | 114 // of a format change, so we output silence in this case. |
| 115 MutexTryLocker tryLocker(m_processLock); | 115 MutexTryLocker tryLocker(m_processLock); |
| 116 if (tryLocker.locked()) { | 116 if (tryLocker.locked()) { |
| 117 getAudioSourceProvider()->provideInput(outputBus, numberOfFrames); | 117 getAudioSourceProvider()->provideInput(outputBus, numberOfFrames); |
| 118 } else { | 118 } else { |
| 119 // We failed to acquire the lock. | 119 // We failed to acquire the lock. |
| 120 outputBus->zero(); | 120 outputBus->zero(); |
| 121 } | 121 } |
| 122 } | 122 } |
| 123 | 123 |
| 124 // ---------------------------------------------------------------- | 124 // ---------------------------------------------------------------- |
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| 184 MediaStream* MediaStreamAudioSourceNode::getMediaStream() const { | 184 MediaStream* MediaStreamAudioSourceNode::getMediaStream() const { |
| 185 return mediaStreamAudioSourceHandler().getMediaStream(); | 185 return mediaStreamAudioSourceHandler().getMediaStream(); |
| 186 } | 186 } |
| 187 | 187 |
| 188 void MediaStreamAudioSourceNode::setFormat(size_t numberOfChannels, | 188 void MediaStreamAudioSourceNode::setFormat(size_t numberOfChannels, |
| 189 float sourceSampleRate) { | 189 float sourceSampleRate) { |
| 190 mediaStreamAudioSourceHandler().setFormat(numberOfChannels, sourceSampleRate); | 190 mediaStreamAudioSourceHandler().setFormat(numberOfChannels, sourceSampleRate); |
| 191 } | 191 } |
| 192 | 192 |
| 193 } // namespace blink | 193 } // namespace blink |
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