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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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31 #include <algorithm> | 31 #include <algorithm> |
32 #include "platform/audio/AudioBus.h" | 32 #include "platform/audio/AudioBus.h" |
33 #include "platform/audio/AudioUtilities.h" | 33 #include "platform/audio/AudioUtilities.h" |
34 #include "wtf/MathExtras.h" | 34 #include "wtf/MathExtras.h" |
35 | 35 |
36 // Use a 50ms smoothing / de-zippering time-constant. | 36 // Use a 50ms smoothing / de-zippering time-constant. |
37 const float SmoothingTimeConstant = 0.050f; | 37 const float SmoothingTimeConstant = 0.050f; |
38 | 38 |
39 using namespace std; | 39 using namespace std; |
40 | 40 |
41 namespace WebCore { | 41 namespace blink { |
42 | 42 |
43 EqualPowerPanner::EqualPowerPanner(float sampleRate) | 43 EqualPowerPanner::EqualPowerPanner(float sampleRate) |
44 : Panner(PanningModelEqualPower) | 44 : Panner(PanningModelEqualPower) |
45 , m_isFirstRender(true) | 45 , m_isFirstRender(true) |
46 , m_gainL(0.0) | 46 , m_gainL(0.0) |
47 , m_gainR(0.0) | 47 , m_gainR(0.0) |
48 { | 48 { |
49 m_smoothingConstant = AudioUtilities::discreteTimeConstantForSampleRate(Smoo
thingTimeConstant, sampleRate); | 49 m_smoothingConstant = AudioUtilities::discreteTimeConstantForSampleRate(Smoo
thingTimeConstant, sampleRate); |
50 } | 50 } |
51 | 51 |
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147 *destinationL++ = static_cast<float>(inputL * gainL); | 147 *destinationL++ = static_cast<float>(inputL * gainL); |
148 *destinationR++ = static_cast<float>(inputR + inputL * gainR); | 148 *destinationR++ = static_cast<float>(inputR + inputL * gainR); |
149 } | 149 } |
150 } | 150 } |
151 } | 151 } |
152 | 152 |
153 m_gainL = gainL; | 153 m_gainL = gainL; |
154 m_gainR = gainR; | 154 m_gainR = gainR; |
155 } | 155 } |
156 | 156 |
157 } // namespace WebCore | 157 } // namespace blink |
158 | 158 |
159 #endif // ENABLE(WEB_AUDIO) | 159 #endif // ENABLE(WEB_AUDIO) |
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