OLD | NEW |
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 |
(...skipping 52 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
63 | 63 |
64 ASSERT(processor()); | 64 ASSERT(processor()); |
65 processor()->uninitialize(); | 65 processor()->uninitialize(); |
66 | 66 |
67 AudioNode::uninitialize(); | 67 AudioNode::uninitialize(); |
68 } | 68 } |
69 | 69 |
70 void AudioBasicProcessorNode::process(size_t framesToProcess) | 70 void AudioBasicProcessorNode::process(size_t framesToProcess) |
71 { | 71 { |
72 AudioBus* destinationBus = output(0)->bus(); | 72 AudioBus* destinationBus = output(0)->bus(); |
73 | 73 |
74 if (!isInitialized() || !processor() || processor()->numberOfChannels() != n
umberOfChannels()) | 74 if (!isInitialized() || !processor() || processor()->numberOfChannels() != n
umberOfChannels()) |
75 destinationBus->zero(); | 75 destinationBus->zero(); |
76 else { | 76 else { |
77 AudioBus* sourceBus = input(0)->bus(); | 77 AudioBus* sourceBus = input(0)->bus(); |
78 | 78 |
79 // FIXME: if we take "tail time" into account, then we can avoid calling
processor()->process() once the tail dies down. | 79 // FIXME: if we take "tail time" into account, then we can avoid calling
processor()->process() once the tail dies down. |
80 if (!input(0)->isConnected()) | 80 if (!input(0)->isConnected()) |
81 sourceBus->zero(); | 81 sourceBus->zero(); |
82 | 82 |
83 processor()->process(sourceBus, destinationBus, framesToProcess); | 83 processor()->process(sourceBus, destinationBus, framesToProcess); |
84 } | 84 } |
85 } | 85 } |
86 | 86 |
87 // Nice optimization in the very common case allowing for "in-place" processing | 87 // Nice optimization in the very common case allowing for "in-place" processing |
88 void AudioBasicProcessorNode::pullInputs(size_t framesToProcess) | 88 void AudioBasicProcessorNode::pullInputs(size_t framesToProcess) |
89 { | 89 { |
90 // Render input stream - suggest to the input to render directly into output
bus for in-place processing in process() if possible. | 90 // Render input stream - suggest to the input to render directly into output
bus for in-place processing in process() if possible. |
91 input(0)->pull(output(0)->bus(), framesToProcess); | 91 input(0)->pull(output(0)->bus(), framesToProcess); |
92 } | 92 } |
93 | 93 |
94 void AudioBasicProcessorNode::reset() | 94 void AudioBasicProcessorNode::reset() |
95 { | 95 { |
96 if (processor()) | 96 if (processor()) |
97 processor()->reset(); | 97 processor()->reset(); |
98 } | 98 } |
99 | 99 |
100 // As soon as we know the channel count of our input, we can lazily initialize. | 100 // As soon as we know the channel count of our input, we can lazily initialize. |
101 // Sometimes this may be called more than once with different channel counts, in
which case we must safely | 101 // Sometimes this may be called more than once with different channel counts, in
which case we must safely |
102 // uninitialize and then re-initialize with the new channel count. | 102 // uninitialize and then re-initialize with the new channel count. |
103 void AudioBasicProcessorNode::checkNumberOfChannelsForInput(AudioNodeInput* inpu
t) | 103 void AudioBasicProcessorNode::checkNumberOfChannelsForInput(AudioNodeInput* inpu
t) |
104 { | 104 { |
105 ASSERT(context()->isAudioThread() && context()->isGraphOwner()); | 105 ASSERT(context()->isAudioThread() && context()->isGraphOwner()); |
106 | 106 |
107 ASSERT(input == this->input(0)); | 107 ASSERT(input == this->input(0)); |
108 if (input != this->input(0)) | 108 if (input != this->input(0)) |
109 return; | 109 return; |
110 | 110 |
111 ASSERT(processor()); | 111 ASSERT(processor()); |
112 if (!processor()) | 112 if (!processor()) |
113 return; | 113 return; |
114 | 114 |
115 unsigned numberOfChannels = input->numberOfChannels(); | 115 unsigned numberOfChannels = input->numberOfChannels(); |
116 | 116 |
117 if (isInitialized() && numberOfChannels != output(0)->numberOfChannels()) { | 117 if (isInitialized() && numberOfChannels != output(0)->numberOfChannels()) { |
118 // We're already initialized but the channel count has changed. | 118 // We're already initialized but the channel count has changed. |
119 uninitialize(); | 119 uninitialize(); |
120 } | 120 } |
121 | 121 |
122 if (!isInitialized()) { | 122 if (!isInitialized()) { |
123 // This will propagate the channel count to any nodes connected further
down the chain... | 123 // This will propagate the channel count to any nodes connected further
down the chain... |
124 output(0)->setNumberOfChannels(numberOfChannels); | 124 output(0)->setNumberOfChannels(numberOfChannels); |
125 | 125 |
126 // Re-initialize the processor with the new channel count. | 126 // Re-initialize the processor with the new channel count. |
127 processor()->setNumberOfChannels(numberOfChannels); | 127 processor()->setNumberOfChannels(numberOfChannels); |
128 initialize(); | 128 initialize(); |
129 } | 129 } |
130 | 130 |
131 AudioNode::checkNumberOfChannelsForInput(input); | 131 AudioNode::checkNumberOfChannelsForInput(input); |
(...skipping 10 matching lines...) Expand all Loading... |
142 } | 142 } |
143 | 143 |
144 double AudioBasicProcessorNode::latencyTime() const | 144 double AudioBasicProcessorNode::latencyTime() const |
145 { | 145 { |
146 return m_processor->latencyTime(); | 146 return m_processor->latencyTime(); |
147 } | 147 } |
148 | 148 |
149 } // namespace WebCore | 149 } // namespace WebCore |
150 | 150 |
151 #endif // ENABLE(WEB_AUDIO) | 151 #endif // ENABLE(WEB_AUDIO) |
OLD | NEW |