1 /* 2 * Copyright (c) 2011 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 #include "webrtc/modules/audio_coding/neteq/random_vector.h" 12 13 namespace webrtc { 14 15 const int16_t RandomVector::kRandomTable[RandomVector::kRandomTableSize] = { 16 2680, 5532, 441, 5520, 16170, -5146, -1024, -8733, 3115, 9598, -10380, 17 -4959, -1280, -21716, 7133, -1522, 13458, -3902, 2789, -675, 3441, 5016, 18 -13599, -4003, -2739, 3922, -7209, 13352, -11617, -7241, 12905, -2314, 5426, 19 10121, -9702, 11207, -13542, 1373, 816, -5934, -12504, 4798, 1811, 4112, 20 -613, 201, -10367, -2960, -2419, 3442, 4299, -6116, -6092, 1552, -1650, 21 -480, -1237, 18720, -11858, -8303, -8212, 865, -2890, -16968, 12052, -5845, 22 -5912, 9777, -5665, -6294, 5426, -4737, -6335, 1652, 761, 3832, 641, -8552, 23 -9084, -5753, 8146, 12156, -4915, 15086, -1231, -1869, 11749, -9319, -6403, 24 11407, 6232, -1683, 24340, -11166, 4017, -10448, 3153, -2936, 6212, 2891, 25 -866, -404, -4807, -2324, -1917, -2388, -6470, -3895, -10300, 5323, -5403, 26 2205, 4640, 7022, -21186, -6244, -882, -10031, -3395, -12885, 7155, -5339, 27 5079, -2645, -9515, 6622, 14651, 15852, 359, 122, 8246, -3502, -6696, -3679, 28 -13535, -1409, -704, -7403, -4007, 1798, 279, -420, -12796, -14219, 1141, 29 3359, 11434, 7049, -6684, -7473, 14283, -4115, -9123, -8969, 4152, 4117, 30 13792, 5742, 16168, 8661, -1609, -6095, 1881, 14380, -5588, 6758, -6425, 31 -22969, -7269, 7031, 1119, -1611, -5850, -11281, 3559, -8952, -10146, -4667, 32 -16251, -1538, 2062, -1012, -13073, 227, -3142, -5265, 20, 5770, -7559, 33 4740, -4819, 992, -8208, -7130, -4652, 6725, 7369, -1036, 13144, -1588, 34 -5304, -2344, -449, -5705, -8894, 5205, -17904, -11188, -1022, 4852, 10101, 35 -5255, -4200, -752, 7941, -1543, 5959, 14719, 13346, 17045, -15605, -1678, 36 -1600, -9230, 68, 23348, 1172, 7750, 11212, -18227, 9956, 4161, 883, 3947, 37 4341, 1014, -4889, -2603, 1246, -5630, -3596, -870, -1298, 2784, -3317, 38 -6612, -20541, 4166, 4181, -8625, 3562, 12890, 4761, 3205, -12259, -8579 }; 39 40 void RandomVector::Reset() { 41 seed_ = 777; 42 seed_increment_ = 1; 43 } 44 45 void RandomVector::Generate(size_t length, int16_t* output) { 46 for (size_t i = 0; i < length; i++) { 47 seed_ += seed_increment_; 48 size_t position = seed_ & (kRandomTableSize - 1); 49 output[i] = kRandomTable[position]; 50 } 51 } 52 53 void RandomVector::IncreaseSeedIncrement(int16_t increase_by) { 54 seed_increment_+= increase_by; 55 seed_increment_ &= kRandomTableSize - 1; 56 } 57 } // namespace webrtc 58
