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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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| 69 unsigned j = (i + InterpolationFactor); | 69 unsigned j = (i + InterpolationFactor); |
| 70 if (j >= NumberOfTotalElevations) | 70 if (j >= NumberOfTotalElevations) |
| 71 j = i; // for last elevation interpolate with itself | 71 j = i; // for last elevation interpolate with itself |
| 72 | 72 |
| 73 // Create the interpolated convolution kernels and delays. | 73 // Create the interpolated convolution kernels and delays. |
| 74 for (unsigned jj = 1; jj < InterpolationFactor; ++jj) { | 74 for (unsigned jj = 1; jj < InterpolationFactor; ++jj) { |
| 75 float x = | 75 float x = |
| 76 static_cast<float>(jj) / static_cast<float>(InterpolationFactor); | 76 static_cast<float>(jj) / static_cast<float>(InterpolationFactor); |
| 77 m_elevations[i + jj] = HRTFElevation::createByInterpolatingSlices( | 77 m_elevations[i + jj] = HRTFElevation::createByInterpolatingSlices( |
| 78 m_elevations[i].get(), m_elevations[j].get(), x, sampleRate); | 78 m_elevations[i].get(), m_elevations[j].get(), x, sampleRate); |
| 79 DCHECK(m_elevations[i + jj].get()); | 79 ASSERT(m_elevations[i + jj].get()); |
| 80 } | 80 } |
| 81 } | 81 } |
| 82 } | 82 } |
| 83 } | 83 } |
| 84 | 84 |
| 85 void HRTFDatabase::getKernelsFromAzimuthElevation(double azimuthBlend, | 85 void HRTFDatabase::getKernelsFromAzimuthElevation(double azimuthBlend, |
| 86 unsigned azimuthIndex, | 86 unsigned azimuthIndex, |
| 87 double elevationAngle, | 87 double elevationAngle, |
| 88 HRTFKernel*& kernelL, | 88 HRTFKernel*& kernelL, |
| 89 HRTFKernel*& kernelR, | 89 HRTFKernel*& kernelR, |
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| 119 elevationAngle = | 119 elevationAngle = |
| 120 clampTo<double, double>(elevationAngle, MinElevation, MaxElevation); | 120 clampTo<double, double>(elevationAngle, MinElevation, MaxElevation); |
| 121 | 121 |
| 122 unsigned elevationIndex = | 122 unsigned elevationIndex = |
| 123 static_cast<int>(InterpolationFactor * (elevationAngle - MinElevation) / | 123 static_cast<int>(InterpolationFactor * (elevationAngle - MinElevation) / |
| 124 RawElevationAngleSpacing); | 124 RawElevationAngleSpacing); |
| 125 return elevationIndex; | 125 return elevationIndex; |
| 126 } | 126 } |
| 127 | 127 |
| 128 } // namespace blink | 128 } // namespace blink |
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