1 /* 2 * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #ifndef WEBRTC_MODULES_AUDIO_PROCESSING_VAD_VAD_AUDIO_PROC_INTERNAL_H_ 12 #define WEBRTC_MODULES_AUDIO_PROCESSING_VAD_VAD_AUDIO_PROC_INTERNAL_H_ 13 14 namespace webrtc { 15 16 // These values should match MATLAB counterparts for unit-tests to pass. 17 static const double kCorrWeight[] = {1.000000, 18 0.985000, 19 0.970225, 20 0.955672, 21 0.941337, 22 0.927217, 23 0.913308, 24 0.899609, 25 0.886115, 26 0.872823, 27 0.859730, 28 0.846834, 29 0.834132, 30 0.821620, 31 0.809296, 32 0.797156, 33 0.785199}; 34 35 static const double kLpcAnalWin[] = { 36 0.00000000, 0.01314436, 0.02628645, 0.03942400, 0.05255473, 0.06567639, 37 0.07878670, 0.09188339, 0.10496421, 0.11802689, 0.13106918, 0.14408883, 38 0.15708358, 0.17005118, 0.18298941, 0.19589602, 0.20876878, 0.22160547, 39 0.23440387, 0.24716177, 0.25987696, 0.27254725, 0.28517045, 0.29774438, 40 0.31026687, 0.32273574, 0.33514885, 0.34750406, 0.35979922, 0.37203222, 41 0.38420093, 0.39630327, 0.40833713, 0.42030043, 0.43219112, 0.44400713, 42 0.45574642, 0.46740697, 0.47898676, 0.49048379, 0.50189608, 0.51322164, 43 0.52445853, 0.53560481, 0.54665854, 0.55761782, 0.56848075, 0.57924546, 44 0.58991008, 0.60047278, 0.61093173, 0.62128512, 0.63153117, 0.64166810, 45 0.65169416, 0.66160761, 0.67140676, 0.68108990, 0.69065536, 0.70010148, 46 0.70942664, 0.71862923, 0.72770765, 0.73666033, 0.74548573, 0.75418233, 47 0.76274862, 0.77118312, 0.77948437, 0.78765094, 0.79568142, 0.80357442, 48 0.81132858, 0.81894256, 0.82641504, 0.83374472, 0.84093036, 0.84797069, 49 0.85486451, 0.86161063, 0.86820787, 0.87465511, 0.88095122, 0.88709512, 50 0.89308574, 0.89892206, 0.90460306, 0.91012776, 0.91549520, 0.92070447, 51 0.92575465, 0.93064488, 0.93537432, 0.93994213, 0.94434755, 0.94858979, 52 0.95266814, 0.95658189, 0.96033035, 0.96391289, 0.96732888, 0.97057773, 53 0.97365889, 0.97657181, 0.97931600, 0.98189099, 0.98429632, 0.98653158, 54 0.98859639, 0.99049038, 0.99221324, 0.99376466, 0.99514438, 0.99635215, 55 0.99738778, 0.99825107, 0.99894188, 0.99946010, 0.99980562, 0.99997840, 56 0.99997840, 0.99980562, 0.99946010, 0.99894188, 0.99825107, 0.99738778, 57 0.99635215, 0.99514438, 0.99376466, 0.99221324, 0.99049038, 0.98859639, 58 0.98653158, 0.98429632, 0.98189099, 0.97931600, 0.97657181, 0.97365889, 59 0.97057773, 0.96732888, 0.96391289, 0.96033035, 0.95658189, 0.95266814, 60 0.94858979, 0.94434755, 0.93994213, 0.93537432, 0.93064488, 0.92575465, 61 0.92070447, 0.91549520, 0.91012776, 0.90460306, 0.89892206, 0.89308574, 62 0.88709512, 0.88095122, 0.87465511, 0.86820787, 0.86161063, 0.85486451, 63 0.84797069, 0.84093036, 0.83374472, 0.82641504, 0.81894256, 0.81132858, 64 0.80357442, 0.79568142, 0.78765094, 0.77948437, 0.77118312, 0.76274862, 65 0.75418233, 0.74548573, 0.73666033, 0.72770765, 0.71862923, 0.70942664, 66 0.70010148, 0.69065536, 0.68108990, 0.67140676, 0.66160761, 0.65169416, 67 0.64166810, 0.63153117, 0.62128512, 0.61093173, 0.60047278, 0.58991008, 68 0.57924546, 0.56848075, 0.55761782, 0.54665854, 0.53560481, 0.52445853, 69 0.51322164, 0.50189608, 0.49048379, 0.47898676, 0.46740697, 0.45574642, 70 0.44400713, 0.43219112, 0.42030043, 0.40833713, 0.39630327, 0.38420093, 71 0.37203222, 0.35979922, 0.34750406, 0.33514885, 0.32273574, 0.31026687, 72 0.29774438, 0.28517045, 0.27254725, 0.25987696, 0.24716177, 0.23440387, 73 0.22160547, 0.20876878, 0.19589602, 0.18298941, 0.17005118, 0.15708358, 74 0.14408883, 0.13106918, 0.11802689, 0.10496421, 0.09188339, 0.07878670, 75 0.06567639, 0.05255473, 0.03942400, 0.02628645, 0.01314436, 0.00000000}; 76 77 static const size_t kFilterOrder = 2; 78 static const float kCoeffNumerator[kFilterOrder + 1] = {0.974827f, 79 -1.949650f, 80 0.974827f}; 81 static const float kCoeffDenominator[kFilterOrder + 1] = {1.0f, 82 -1.971999f, 83 0.972457f}; 84 85 static_assert(kFilterOrder + 1 == 86 sizeof(kCoeffNumerator) / sizeof(kCoeffNumerator[0]), 87 "numerator coefficients incorrect size"); 88 static_assert(kFilterOrder + 1 == 89 sizeof(kCoeffDenominator) / sizeof(kCoeffDenominator[0]), 90 "denominator coefficients incorrect size"); 91 92 } // namespace webrtc 93 94 #endif // WEBRTC_MODULES_AUDIO_PROCESSING_VAD_VAD_AUDIO_PROCESSING_H_ 95