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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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29 #include "platform/audio/HRTFPanner.h" | 29 #include "platform/audio/HRTFPanner.h" |
30 | 30 |
31 #include <algorithm> | 31 #include <algorithm> |
32 #include "platform/audio/AudioBus.h" | 32 #include "platform/audio/AudioBus.h" |
33 #include "platform/audio/HRTFDatabase.h" | 33 #include "platform/audio/HRTFDatabase.h" |
34 #include "wtf/MathExtras.h" | 34 #include "wtf/MathExtras.h" |
35 #include "wtf/RefPtr.h" | 35 #include "wtf/RefPtr.h" |
36 | 36 |
37 using namespace std; | 37 using namespace std; |
38 | 38 |
39 namespace WebCore { | 39 namespace blink { |
40 | 40 |
41 // The value of 2 milliseconds is larger than the largest delay which exists in
any HRTFKernel from the default HRTFDatabase (0.0136 seconds). | 41 // The value of 2 milliseconds is larger than the largest delay which exists in
any HRTFKernel from the default HRTFDatabase (0.0136 seconds). |
42 // We ASSERT the delay values used in process() with this value. | 42 // We ASSERT the delay values used in process() with this value. |
43 const double MaxDelayTimeSeconds = 0.002; | 43 const double MaxDelayTimeSeconds = 0.002; |
44 | 44 |
45 const int UninitializedAzimuth = -1; | 45 const int UninitializedAzimuth = -1; |
46 const unsigned RenderingQuantum = 128; | 46 const unsigned RenderingQuantum = 128; |
47 | 47 |
48 HRTFPanner::HRTFPanner(float sampleRate, HRTFDatabaseLoader* databaseLoader) | 48 HRTFPanner::HRTFPanner(float sampleRate, HRTFDatabaseLoader* databaseLoader) |
49 : Panner(PanningModelHRTF) | 49 : Panner(PanningModelHRTF) |
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301 return MaxDelayTimeSeconds + (fftSize() / 2) / static_cast<double>(sampleRat
e()); | 301 return MaxDelayTimeSeconds + (fftSize() / 2) / static_cast<double>(sampleRat
e()); |
302 } | 302 } |
303 | 303 |
304 double HRTFPanner::latencyTime() const | 304 double HRTFPanner::latencyTime() const |
305 { | 305 { |
306 // The latency of a FFTConvolver is also fftSize() / 2, and is in addition t
o its tailTime of the | 306 // The latency of a FFTConvolver is also fftSize() / 2, and is in addition t
o its tailTime of the |
307 // same value. | 307 // same value. |
308 return (fftSize() / 2) / static_cast<double>(sampleRate()); | 308 return (fftSize() / 2) / static_cast<double>(sampleRate()); |
309 } | 309 } |
310 | 310 |
311 } // namespace WebCore | 311 } // namespace blink |
312 | 312 |
313 #endif // ENABLE(WEB_AUDIO) | 313 #endif // ENABLE(WEB_AUDIO) |
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