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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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77 // Do any necesssary re-configuration to the output's number of chan
nels. | 77 // Do any necesssary re-configuration to the output's number of chan
nels. |
78 output(0).setNumberOfChannels(numberOfChannels); | 78 output(0).setNumberOfChannels(numberOfChannels); |
79 } | 79 } |
80 } | 80 } |
81 } | 81 } |
82 | 82 |
83 void MediaStreamAudioSourceHandler::process(size_t numberOfFrames) | 83 void MediaStreamAudioSourceHandler::process(size_t numberOfFrames) |
84 { | 84 { |
85 AudioBus* outputBus = output(0).bus(); | 85 AudioBus* outputBus = output(0).bus(); |
86 | 86 |
87 if (!audioSourceProvider()) { | 87 if (!getAudioSourceProvider()) { |
88 outputBus->zero(); | 88 outputBus->zero(); |
89 return; | 89 return; |
90 } | 90 } |
91 | 91 |
92 if (!mediaStream() || m_sourceNumberOfChannels != outputBus->numberOfChannel
s()) { | 92 if (!getMediaStream() || m_sourceNumberOfChannels != outputBus->numberOfChan
nels()) { |
93 outputBus->zero(); | 93 outputBus->zero(); |
94 return; | 94 return; |
95 } | 95 } |
96 | 96 |
97 // Use a tryLock() to avoid contention in the real-time audio thread. | 97 // Use a tryLock() to avoid contention in the real-time audio thread. |
98 // If we fail to acquire the lock then the MediaStream must be in the middle
of | 98 // If we fail to acquire the lock then the MediaStream must be in the middle
of |
99 // a format change, so we output silence in this case. | 99 // a format change, so we output silence in this case. |
100 MutexTryLocker tryLocker(m_processLock); | 100 MutexTryLocker tryLocker(m_processLock); |
101 if (tryLocker.locked()) { | 101 if (tryLocker.locked()) { |
102 audioSourceProvider()->provideInput(outputBus, numberOfFrames); | 102 getAudioSourceProvider()->provideInput(outputBus, numberOfFrames); |
103 } else { | 103 } else { |
104 // We failed to acquire the lock. | 104 // We failed to acquire the lock. |
105 outputBus->zero(); | 105 outputBus->zero(); |
106 } | 106 } |
107 } | 107 } |
108 | 108 |
109 // ---------------------------------------------------------------- | 109 // ---------------------------------------------------------------- |
110 | 110 |
111 MediaStreamAudioSourceNode::MediaStreamAudioSourceNode(AbstractAudioContext& con
text, MediaStream& mediaStream, MediaStreamTrack* audioTrack, PassOwnPtr<AudioSo
urceProvider> audioSourceProvider) | 111 MediaStreamAudioSourceNode::MediaStreamAudioSourceNode(AbstractAudioContext& con
text, MediaStream& mediaStream, MediaStreamTrack* audioTrack, PassOwnPtr<AudioSo
urceProvider> audioSourceProvider) |
112 : AudioSourceNode(context) | 112 : AudioSourceNode(context) |
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123 { | 123 { |
124 AudioSourceProviderClient::trace(visitor); | 124 AudioSourceProviderClient::trace(visitor); |
125 AudioSourceNode::trace(visitor); | 125 AudioSourceNode::trace(visitor); |
126 } | 126 } |
127 | 127 |
128 MediaStreamAudioSourceHandler& MediaStreamAudioSourceNode::mediaStreamAudioSourc
eHandler() const | 128 MediaStreamAudioSourceHandler& MediaStreamAudioSourceNode::mediaStreamAudioSourc
eHandler() const |
129 { | 129 { |
130 return static_cast<MediaStreamAudioSourceHandler&>(handler()); | 130 return static_cast<MediaStreamAudioSourceHandler&>(handler()); |
131 } | 131 } |
132 | 132 |
133 MediaStream* MediaStreamAudioSourceNode::mediaStream() const | 133 MediaStream* MediaStreamAudioSourceNode::getMediaStream() const |
134 { | 134 { |
135 return mediaStreamAudioSourceHandler().mediaStream(); | 135 return mediaStreamAudioSourceHandler().getMediaStream(); |
136 } | 136 } |
137 | 137 |
138 void MediaStreamAudioSourceNode::setFormat(size_t numberOfChannels, float source
SampleRate) | 138 void MediaStreamAudioSourceNode::setFormat(size_t numberOfChannels, float source
SampleRate) |
139 { | 139 { |
140 mediaStreamAudioSourceHandler().setFormat(numberOfChannels, sourceSampleRate
); | 140 mediaStreamAudioSourceHandler().setFormat(numberOfChannels, sourceSampleRate
); |
141 } | 141 } |
142 | 142 |
143 } // namespace blink | 143 } // namespace blink |
144 | 144 |
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