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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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31 #if ENABLE(WEB_AUDIO) | 31 #if ENABLE(WEB_AUDIO) |
32 | 32 |
33 #include "platform/audio/Distance.h" | 33 #include "platform/audio/Distance.h" |
34 #include "wtf/Assertions.h" | 34 #include "wtf/Assertions.h" |
35 | 35 |
36 #include <math.h> | 36 #include <math.h> |
37 #include <algorithm> | 37 #include <algorithm> |
38 | 38 |
39 using namespace std; | 39 using namespace std; |
40 | 40 |
41 namespace WebCore { | 41 namespace blink { |
42 | 42 |
43 DistanceEffect::DistanceEffect() | 43 DistanceEffect::DistanceEffect() |
44 : m_model(ModelInverse) | 44 : m_model(ModelInverse) |
45 , m_isClamped(true) | 45 , m_isClamped(true) |
46 , m_refDistance(1.0) | 46 , m_refDistance(1.0) |
47 , m_maxDistance(10000.0) | 47 , m_maxDistance(10000.0) |
48 , m_rolloffFactor(1.0) | 48 , m_rolloffFactor(1.0) |
49 { | 49 { |
50 } | 50 } |
51 | 51 |
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80 double DistanceEffect::inverseGain(double distance) | 80 double DistanceEffect::inverseGain(double distance) |
81 { | 81 { |
82 return m_refDistance / (m_refDistance + m_rolloffFactor * (distance - m_refD
istance)); | 82 return m_refDistance / (m_refDistance + m_rolloffFactor * (distance - m_refD
istance)); |
83 } | 83 } |
84 | 84 |
85 double DistanceEffect::exponentialGain(double distance) | 85 double DistanceEffect::exponentialGain(double distance) |
86 { | 86 { |
87 return pow(distance / m_refDistance, -m_rolloffFactor); | 87 return pow(distance / m_refDistance, -m_rolloffFactor); |
88 } | 88 } |
89 | 89 |
90 } // namespace WebCore | 90 } // namespace blink |
91 | 91 |
92 #endif // ENABLE(WEB_AUDIO) | 92 #endif // ENABLE(WEB_AUDIO) |
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