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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 * | 7 * |
8 * 1. Redistributions of source code must retain the above copyright | 8 * 1. Redistributions of source code must retain the above copyright |
9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
10 * 2. Redistributions in binary form must reproduce the above copyright | 10 * 2. Redistributions in binary form must reproduce the above copyright |
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27 */ | 27 */ |
28 | 28 |
29 #include "config.h" | 29 #include "config.h" |
30 | 30 |
31 #if ENABLE(WEB_AUDIO) | 31 #if ENABLE(WEB_AUDIO) |
32 | 32 |
33 #include "modules/webaudio/AudioBuffer.h" | 33 #include "modules/webaudio/AudioBuffer.h" |
34 | 34 |
35 #include "bindings/core/v8/ExceptionMessages.h" | 35 #include "bindings/core/v8/ExceptionMessages.h" |
36 #include "bindings/core/v8/ExceptionState.h" | 36 #include "bindings/core/v8/ExceptionState.h" |
37 #include "bindings/core/v8/custom/V8ArrayBufferCustom.h" | 37 #include "core/dom/DOMArrayBufferDeallocationObserver.h" |
38 #include "core/dom/ExceptionCode.h" | 38 #include "core/dom/ExceptionCode.h" |
39 #include "modules/webaudio/AudioContext.h" | 39 #include "modules/webaudio/AudioContext.h" |
40 #include "platform/audio/AudioBus.h" | 40 #include "platform/audio/AudioBus.h" |
41 #include "platform/audio/AudioFileReader.h" | 41 #include "platform/audio/AudioFileReader.h" |
42 #include "platform/audio/AudioUtilities.h" | 42 #include "platform/audio/AudioUtilities.h" |
43 | 43 |
44 namespace blink { | 44 namespace blink { |
45 | 45 |
46 AudioBuffer* AudioBuffer::create(unsigned numberOfChannels, size_t numberOfFrame
s, float sampleRate) | 46 AudioBuffer* AudioBuffer::create(unsigned numberOfChannels, size_t numberOfFrame
s, float sampleRate) |
47 { | 47 { |
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167 // check that the desired number of channels were created. | 167 // check that the desired number of channels were created. |
168 if (!channelDataArray) | 168 if (!channelDataArray) |
169 return; | 169 return; |
170 | 170 |
171 channelDataArray->setNeuterable(false); | 171 channelDataArray->setNeuterable(false); |
172 channelDataArray->setRange(bus->channel(i)->data(), m_length, 0); | 172 channelDataArray->setRange(bus->channel(i)->data(), m_length, 0); |
173 m_channels.append(channelDataArray); | 173 m_channels.append(channelDataArray); |
174 } | 174 } |
175 } | 175 } |
176 | 176 |
177 PassRefPtr<Float32Array> AudioBuffer::getChannelData(unsigned channelIndex, Exce
ptionState& exceptionState) | 177 PassRefPtr<DOMFloat32Array> AudioBuffer::getChannelData(unsigned channelIndex, E
xceptionState& exceptionState) |
178 { | 178 { |
179 if (channelIndex >= m_channels.size()) { | 179 if (channelIndex >= m_channels.size()) { |
180 exceptionState.throwDOMException(IndexSizeError, "channel index (" + Str
ing::number(channelIndex) + ") exceeds number of channels (" + String::number(m_
channels.size()) + ")"); | 180 exceptionState.throwDOMException(IndexSizeError, "channel index (" + Str
ing::number(channelIndex) + ") exceeds number of channels (" + String::number(m_
channels.size()) + ")"); |
181 return nullptr; | 181 return nullptr; |
182 } | 182 } |
183 | 183 |
184 Float32Array* channelData = m_channels[channelIndex].get(); | 184 Float32Array* channelData = m_channels[channelIndex].get(); |
185 return Float32Array::create(channelData->buffer(), channelData->byteOffset()
, channelData->length()); | 185 return DOMFloat32Array::create(channelData->buffer(), channelData->byteOffse
t(), channelData->length()); |
186 } | 186 } |
187 | 187 |
188 Float32Array* AudioBuffer::getChannelData(unsigned channelIndex) | 188 Float32Array* AudioBuffer::getChannelData(unsigned channelIndex) |
189 { | 189 { |
190 if (channelIndex >= m_channels.size()) | 190 if (channelIndex >= m_channels.size()) |
191 return 0; | 191 return 0; |
192 | 192 |
193 return m_channels[channelIndex].get(); | 193 return m_channels[channelIndex].get(); |
194 } | 194 } |
195 | 195 |
196 void AudioBuffer::zero() | 196 void AudioBuffer::zero() |
197 { | 197 { |
198 for (unsigned i = 0; i < m_channels.size(); ++i) { | 198 for (unsigned i = 0; i < m_channels.size(); ++i) { |
199 if (getChannelData(i)) | 199 if (getChannelData(i)) |
200 getChannelData(i)->zeroRange(0, length()); | 200 getChannelData(i)->zeroRange(0, length()); |
201 } | 201 } |
202 } | 202 } |
203 | 203 |
204 v8::Handle<v8::Object> AudioBuffer::associateWithWrapper(const WrapperTypeInfo*
wrapperType, v8::Handle<v8::Object> wrapper, v8::Isolate* isolate) | 204 v8::Handle<v8::Object> AudioBuffer::associateWithWrapper(const WrapperTypeInfo*
wrapperType, v8::Handle<v8::Object> wrapper, v8::Isolate* isolate) |
205 { | 205 { |
206 ScriptWrappable::associateWithWrapper(wrapperType, wrapper, isolate); | 206 ScriptWrappable::associateWithWrapper(wrapperType, wrapper, isolate); |
207 | 207 |
208 if (!wrapper.IsEmpty()) { | 208 if (!wrapper.IsEmpty()) { |
209 // We only setDeallocationObservers on array buffers that are held by | 209 // We only setDeallocationObservers on array buffers that are held by |
210 // some object in the V8 heap, not in the ArrayBuffer constructor | 210 // some object in the V8 heap, not in the ArrayBuffer constructor |
211 // itself. This is because V8 GC only cares about memory it can free on | 211 // itself. This is because V8 GC only cares about memory it can free on |
212 // GC, and until the object is exposed to JavaScript, V8 GC doesn't | 212 // GC, and until the object is exposed to JavaScript, V8 GC doesn't |
213 // affect it. | 213 // affect it. |
214 for (unsigned i = 0, n = numberOfChannels(); i < n; ++i) { | 214 for (unsigned i = 0, n = numberOfChannels(); i < n; ++i) { |
215 getChannelData(i)->buffer()->setDeallocationObserver(V8ArrayBufferDe
allocationObserver::instanceTemplate()); | 215 getChannelData(i)->buffer()->setDeallocationObserver(DOMArrayBufferD
eallocationObserver::instance()); |
216 } | 216 } |
217 } | 217 } |
218 return wrapper; | 218 return wrapper; |
219 } | 219 } |
220 | 220 |
221 } // namespace blink | 221 } // namespace blink |
222 | 222 |
223 #endif // ENABLE(WEB_AUDIO) | 223 #endif // ENABLE(WEB_AUDIO) |
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