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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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23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND | 23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | 24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 */ | 27 */ |
28 | 28 |
29 #include "platform/audio/HRTFDatabase.h" | 29 #include "platform/audio/HRTFDatabase.h" |
30 | 30 |
31 #if ENABLE(WEB_AUDIO) | 31 #if ENABLE(WEB_AUDIO) |
32 | 32 |
| 33 #include "wtf/MathExtras.h" |
| 34 |
33 namespace blink { | 35 namespace blink { |
34 | 36 |
35 const int HRTFDatabase::MinElevation = -45; | 37 const int HRTFDatabase::MinElevation = -45; |
36 const int HRTFDatabase::MaxElevation = 90; | 38 const int HRTFDatabase::MaxElevation = 90; |
37 const unsigned HRTFDatabase::RawElevationAngleSpacing = 15; | 39 const unsigned HRTFDatabase::RawElevationAngleSpacing = 15; |
38 const unsigned HRTFDatabase::NumberOfRawElevations = 10; // -45 -> +90 (each 15
degrees) | 40 const unsigned HRTFDatabase::NumberOfRawElevations = 10; // -45 -> +90 (each 15
degrees) |
39 const unsigned HRTFDatabase::InterpolationFactor = 1; | 41 const unsigned HRTFDatabase::InterpolationFactor = 1; |
40 const unsigned HRTFDatabase::NumberOfTotalElevations = NumberOfRawElevations * I
nterpolationFactor; | 42 const unsigned HRTFDatabase::NumberOfTotalElevations = NumberOfRawElevations * I
nterpolationFactor; |
41 | 43 |
42 PassOwnPtr<HRTFDatabase> HRTFDatabase::create(float sampleRate) | 44 PassOwnPtr<HRTFDatabase> HRTFDatabase::create(float sampleRate) |
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99 kernelR = 0; | 101 kernelR = 0; |
100 return; | 102 return; |
101 } | 103 } |
102 | 104 |
103 hrtfElevation->getKernelsFromAzimuth(azimuthBlend, azimuthIndex, kernelL, ke
rnelR, frameDelayL, frameDelayR); | 105 hrtfElevation->getKernelsFromAzimuth(azimuthBlend, azimuthIndex, kernelL, ke
rnelR, frameDelayL, frameDelayR); |
104 } | 106 } |
105 | 107 |
106 unsigned HRTFDatabase::indexFromElevationAngle(double elevationAngle) | 108 unsigned HRTFDatabase::indexFromElevationAngle(double elevationAngle) |
107 { | 109 { |
108 // Clamp to allowed range. | 110 // Clamp to allowed range. |
109 elevationAngle = std::max(static_cast<double>(MinElevation), elevationAngle)
; | 111 elevationAngle = clampTo<double, double>(elevationAngle, MinElevation, MaxEl
evation); |
110 elevationAngle = std::min(static_cast<double>(MaxElevation), elevationAngle)
; | |
111 | 112 |
112 unsigned elevationIndex = static_cast<int>(InterpolationFactor * (elevationA
ngle - MinElevation) / RawElevationAngleSpacing); | 113 unsigned elevationIndex = static_cast<int>(InterpolationFactor * (elevationA
ngle - MinElevation) / RawElevationAngleSpacing); |
113 return elevationIndex; | 114 return elevationIndex; |
114 } | 115 } |
115 | 116 |
116 } // namespace blink | 117 } // namespace blink |
117 | 118 |
118 #endif // ENABLE(WEB_AUDIO) | 119 #endif // ENABLE(WEB_AUDIO) |
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