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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 |
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258 AudioBuffer* outputBuffer = m_outputBuffers[m_doubleBufferIndexForEvent].get
(); | 258 AudioBuffer* outputBuffer = m_outputBuffers[m_doubleBufferIndexForEvent].get
(); |
259 ASSERT(outputBuffer); | 259 ASSERT(outputBuffer); |
260 if (!outputBuffer) | 260 if (!outputBuffer) |
261 return; | 261 return; |
262 | 262 |
263 // Avoid firing the event if the document has already gone away. | 263 // Avoid firing the event if the document has already gone away. |
264 if (context()->executionContext()) { | 264 if (context()->executionContext()) { |
265 // Let the audio thread know we've gotten to the point where it's OK for
it to make another request. | 265 // Let the audio thread know we've gotten to the point where it's OK for
it to make another request. |
266 m_isRequestOutstanding = false; | 266 m_isRequestOutstanding = false; |
267 | 267 |
| 268 // Calculate a playbackTime with the buffersize which needs to be proces
sed each time onaudioprocess is called. |
| 269 // The outputBuffer being passed to JS will be played after exhuasting p
revious outputBuffer by double-buffering. |
| 270 double playbackTime = (context()->currentSampleFrame() + m_bufferSize) /
context()->sampleRate(); |
| 271 |
268 // Call the JavaScript event handler which will do the audio processing. | 272 // Call the JavaScript event handler which will do the audio processing. |
269 dispatchEvent(AudioProcessingEvent::create(inputBuffer, outputBuffer)); | 273 dispatchEvent(AudioProcessingEvent::create(inputBuffer, outputBuffer, pl
aybackTime)); |
270 } | 274 } |
271 } | 275 } |
272 | 276 |
273 double ScriptProcessorNode::tailTime() const | 277 double ScriptProcessorNode::tailTime() const |
274 { | 278 { |
275 return std::numeric_limits<double>::infinity(); | 279 return std::numeric_limits<double>::infinity(); |
276 } | 280 } |
277 | 281 |
278 double ScriptProcessorNode::latencyTime() const | 282 double ScriptProcessorNode::latencyTime() const |
279 { | 283 { |
280 return std::numeric_limits<double>::infinity(); | 284 return std::numeric_limits<double>::infinity(); |
281 } | 285 } |
282 | 286 |
283 } // namespace WebCore | 287 } // namespace WebCore |
284 | 288 |
285 #endif // ENABLE(WEB_AUDIO) | 289 #endif // ENABLE(WEB_AUDIO) |
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