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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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21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | 21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
22 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | 22 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
23 */ | 23 */ |
24 | 24 |
25 #include "config.h" | 25 #include "config.h" |
26 | 26 |
27 #if ENABLE(WEB_AUDIO) | 27 #if ENABLE(WEB_AUDIO) |
28 | 28 |
29 #include "platform/audio/EqualPowerPanner.h" | 29 #include "platform/audio/EqualPowerPanner.h" |
30 | 30 |
31 #include <algorithm> | |
32 #include "platform/audio/AudioBus.h" | 31 #include "platform/audio/AudioBus.h" |
33 #include "platform/audio/AudioUtilities.h" | 32 #include "platform/audio/AudioUtilities.h" |
34 #include "wtf/MathExtras.h" | 33 #include "wtf/MathExtras.h" |
| 34 #include <algorithm> |
| 35 #include <cmath> |
35 | 36 |
36 // Use a 50ms smoothing / de-zippering time-constant. | 37 // Use a 50ms smoothing / de-zippering time-constant. |
37 const float SmoothingTimeConstant = 0.050f; | 38 const float SmoothingTimeConstant = 0.050f; |
38 | 39 |
39 namespace blink { | 40 namespace blink { |
40 | 41 |
41 EqualPowerPanner::EqualPowerPanner(float sampleRate) | 42 EqualPowerPanner::EqualPowerPanner(float sampleRate) |
42 : Panner(PanningModelEqualPower) | 43 : Panner(PanningModelEqualPower) |
43 , m_isFirstRender(true) | 44 , m_isFirstRender(true) |
44 , m_gainL(0.0) | 45 , m_gainL(0.0) |
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63 | 64 |
64 const float* sourceL = inputBus->channel(0)->data(); | 65 const float* sourceL = inputBus->channel(0)->data(); |
65 const float* sourceR = numberOfInputChannels > 1 ? inputBus->channel(1)->dat
a() : sourceL; | 66 const float* sourceR = numberOfInputChannels > 1 ? inputBus->channel(1)->dat
a() : sourceL; |
66 float* destinationL = outputBus->channelByType(AudioBus::ChannelLeft)->mutab
leData(); | 67 float* destinationL = outputBus->channelByType(AudioBus::ChannelLeft)->mutab
leData(); |
67 float* destinationR = outputBus->channelByType(AudioBus::ChannelRight)->muta
bleData(); | 68 float* destinationR = outputBus->channelByType(AudioBus::ChannelRight)->muta
bleData(); |
68 | 69 |
69 if (!sourceL || !sourceR || !destinationL || !destinationR) | 70 if (!sourceL || !sourceR || !destinationL || !destinationR) |
70 return; | 71 return; |
71 | 72 |
72 // Clamp azimuth to allowed range of -180 -> +180. | 73 // Clamp azimuth to allowed range of -180 -> +180. |
73 azimuth = std::max(-180.0, azimuth); | 74 azimuth = clampTo(azimuth, -180.0, 180.0); |
74 azimuth = std::min(180.0, azimuth); | |
75 | 75 |
76 // Alias the azimuth ranges behind us to in front of us: | 76 // Alias the azimuth ranges behind us to in front of us: |
77 // -90 -> -180 to -90 -> 0 and 90 -> 180 to 90 -> 0 | 77 // -90 -> -180 to -90 -> 0 and 90 -> 180 to 90 -> 0 |
78 if (azimuth < -90) | 78 if (azimuth < -90) |
79 azimuth = -180 - azimuth; | 79 azimuth = -180 - azimuth; |
80 else if (azimuth > 90) | 80 else if (azimuth > 90) |
81 azimuth = 180 - azimuth; | 81 azimuth = 180 - azimuth; |
82 | 82 |
83 double desiredPanPosition; | 83 double desiredPanPosition; |
84 double desiredGainL; | 84 double desiredGainL; |
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148 } | 148 } |
149 } | 149 } |
150 | 150 |
151 m_gainL = gainL; | 151 m_gainL = gainL; |
152 m_gainR = gainR; | 152 m_gainR = gainR; |
153 } | 153 } |
154 | 154 |
155 } // namespace blink | 155 } // namespace blink |
156 | 156 |
157 #endif // ENABLE(WEB_AUDIO) | 157 #endif // ENABLE(WEB_AUDIO) |
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