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 /* 12 * filterbank_tables.c 13 * 14 * This file contains variables that are used in 15 * filterbanks.c 16 * 17 */ 18 19 #include "filterbank_tables.h" 20 21 /* HPstcoeff_in_Q14 = {a1, a2, b1 - b0 * a1, b2 - b0 * a2}; 22 * In float, they are: {-1.94895953203325f, 0.94984516000000f, 23 * -0.05101826139794f, 0.05015484000000f}; 24 */ 25 const int16_t WebRtcIsacfix_kHpStCoeffInQ30[8] = { 26 16189, -31932, /* Q30 lo/hi pair */ 27 17243, 15562, /* Q30 lo/hi pair */ 28 -17186, -26748, /* Q35 lo/hi pair */ 29 -27476, 26296 /* Q35 lo/hi pair */ 30 }; 31 32 /* HPstcoeff_out_1_Q14 = {a1, a2, b1 - b0 * a1, b2 - b0 * a2}; 33 * In float, they are: {-1.99701049409000f, 0.99714204490000f, 34 * 0.01701049409000f, -0.01704204490000f}; 35 */ 36 const int16_t WebRtcIsacfix_kHPStCoeffOut1Q30[8] = { 37 -1306, -32719, /* Q30 lo/hi pair */ 38 11486, 16337, /* Q30 lo/hi pair */ 39 26078, 8918, /* Q35 lo/hi pair */ 40 3956, -8935 /* Q35 lo/hi pair */ 41 }; 42 43 /* HPstcoeff_out_2_Q14 = {a1, a2, b1 - b0 * a1, b2 - b0 * a2}; 44 * In float, they are: {-1.98645294509837f, 0.98672435560000f, 45 * 0.00645294509837f, -0.00662435560000f}; 46 */ 47 const int16_t WebRtcIsacfix_kHPStCoeffOut2Q30[8] = { 48 -2953, -32546, /* Q30 lo/hi pair */ 49 32233, 16166, /* Q30 lo/hi pair */ 50 13217, 3383, /* Q35 lo/hi pair */ 51 -4597, -3473 /* Q35 lo/hi pair */ 52 }; 53 54 /* The upper channel all-pass filter factors */ 55 const int16_t WebRtcIsacfix_kUpperApFactorsQ15[2] = { 56 1137, 12537 57 }; 58 59 /* The lower channel all-pass filter factors */ 60 const int16_t WebRtcIsacfix_kLowerApFactorsQ15[2] = { 61 5059, 24379 62 }; 63
