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 /* 12 * filterbank_tables.h 13 * 14 * Header file for variables that are defined in 15 * filterbank_tables.c. 16 * 17 */ 18 19 #ifndef WEBRTC_MODULES_AUDIO_CODING_CODECS_ISAC_MAIN_SOURCE_FILTERBANK_TABLES_H_ 20 #define WEBRTC_MODULES_AUDIO_CODING_CODECS_ISAC_MAIN_SOURCE_FILTERBANK_TABLES_H_ 21 22 #include "structs.h" 23 24 /********************* Coefficient Tables ************************/ 25 /* The number of composite all-pass filter factors */ 26 #define NUMBEROFCOMPOSITEAPSECTIONS 4 27 28 /* The number of all-pass filter factors in an upper or lower channel*/ 29 #define NUMBEROFCHANNELAPSECTIONS 2 30 31 /* The composite all-pass filter factors */ 32 extern const float WebRtcIsac_kCompositeApFactorsFloat[4]; 33 34 /* The upper channel all-pass filter factors */ 35 extern const float WebRtcIsac_kUpperApFactorsFloat[2]; 36 37 /* The lower channel all-pass filter factors */ 38 extern const float WebRtcIsac_kLowerApFactorsFloat[2]; 39 40 /* The matrix for transforming the backward composite state to upper channel state */ 41 extern const float WebRtcIsac_kTransform1Float[8]; 42 43 /* The matrix for transforming the backward composite state to lower channel state */ 44 extern const float WebRtcIsac_kTransform2Float[8]; 45 46 #endif /* WEBRTC_MODULES_AUDIO_CODING_CODECS_ISAC_MAIN_SOURCE_FILTERBANK_TABLES_H_ */ 47
