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 /* filterbank_tables.c*/ 12 /* This file contains variables that are used in filterbanks.c*/ 13 14 #include "filterbank_tables.h" 15 #include "settings.h" 16 17 /* The composite all-pass filter factors */ 18 const float WebRtcIsac_kCompositeApFactorsFloat[4] = { 19 0.03470000000000f, 0.15440000000000f, 0.38260000000000f, 0.74400000000000f}; 20 21 /* The upper channel all-pass filter factors */ 22 const float WebRtcIsac_kUpperApFactorsFloat[2] = { 23 0.03470000000000f, 0.38260000000000f}; 24 25 /* The lower channel all-pass filter factors */ 26 const float WebRtcIsac_kLowerApFactorsFloat[2] = { 27 0.15440000000000f, 0.74400000000000f}; 28 29 /* The matrix for transforming the backward composite state to upper channel state */ 30 const float WebRtcIsac_kTransform1Float[8] = { 31 -0.00158678506084f, 0.00127157815343f, -0.00104805672709f, 0.00084837248079f, 32 0.00134467983258f, -0.00107756549387f, 0.00088814793277f, -0.00071893072525f}; 33 34 /* The matrix for transforming the backward composite state to lower channel state */ 35 const float WebRtcIsac_kTransform2Float[8] = { 36 -0.00170686041697f, 0.00136780109829f, -0.00112736532350f, 0.00091257055385f, 37 0.00103094281812f, -0.00082615076557f, 0.00068092756088f, -0.00055119165484f}; 38
