1 /* ------------------------------------------------------------------ 2 * Copyright (C) 1998-2009 PacketVideo 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either 13 * express or implied. 14 * See the License for the specific language governing permissions 15 * and limitations under the License. 16 * ------------------------------------------------------------------- 17 */ 18 /**************************************************************************************** 19 Portions of this file are derived from the following 3GPP standard: 20 21 3GPP TS 26.073 22 ANSI-C code for the Adaptive Multi-Rate (AMR) speech codec 23 Available from http://www.3gpp.org 24 25 (C) 2004, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TTA, TTC) 26 Permission to distribute, modify and use this file under the standard license 27 terms listed above has been obtained from the copyright holder. 28 ****************************************************************************************/ 29 /* 30 Filename: /audio/gsm_amr/c/include/vad2.h 31 32 ------------------------------------------------------------------------------ 33 REVISION HISTORY 34 35 Description: Placed header file in the proper template format. Added 36 parameter pOverflow for the basic math ops. 37 38 Description: Added pOverflow to the r_fft function prototype. 39 40 Description: Added pOverflow to the LTP_flag_update prototype. 41 42 Description: Replaced "int" and/or "char" with OSCL defined types. 43 44 Description: Moved _cplusplus #ifdef after Include section. 45 46 Who: Date: 47 Description: 48 49 ------------------------------------------------------------------------------ 50 INCLUDE DESCRIPTION 51 52 This file contains all the constant definitions, prototype and structure 53 definitions needed by vad_2.c 54 55 ------------------------------------------------------------------------------ 56 */ 57 58 /*---------------------------------------------------------------------------- 59 ; CONTINUE ONLY IF NOT ALREADY DEFINED 60 ----------------------------------------------------------------------------*/ 61 #ifndef vad_2_h 62 #define vad_2_h "$Id $" 63 64 /*---------------------------------------------------------------------------- 65 ; INCLUDES 66 ----------------------------------------------------------------------------*/ 67 #include "typedef.h" 68 69 /*--------------------------------------------------------------------------*/ 70 #ifdef __cplusplus 71 extern "C" 72 { 73 #endif 74 75 /*---------------------------------------------------------------------------- 76 ; MACROS 77 ; Define module specific macros here 78 ----------------------------------------------------------------------------*/ 79 80 /*---------------------------------------------------------------------------- 81 ; DEFINES 82 ; Include all pre-processor statements here. 83 ----------------------------------------------------------------------------*/ 84 85 #define YES 1 86 #define NO 0 87 #define ON 1 88 #define OFF 0 89 #define TRUE 1 90 #define FALSE 0 91 92 #define FRM_LEN 80 93 #define DELAY 24 94 #define FFT_LEN 128 95 96 #define NUM_CHAN 16 97 #define LO_CHAN 0 98 #define HI_CHAN 15 99 100 #define UPDATE_THLD 35 101 #define HYSTER_CNT_THLD 6 102 #define UPDATE_CNT_THLD 50 103 104 #define SHIFT_STATE_0 0 /* channel energy scaled as 22,9 */ 105 #define SHIFT_STATE_1 1 /* channel energy scaled as 27,4 */ 106 107 #define NOISE_FLOOR_CHAN_0 512 /* 1.0 scaled as 22,9 */ 108 #define MIN_CHAN_ENRG_0 32 /* 0.0625 scaled as 22,9 */ 109 #define MIN_NOISE_ENRG_0 32 /* 0.0625 scaled as 22,9 */ 110 #define INE_NOISE_0 8192 /* 16.0 scaled as 22,9 */ 111 #define FRACTIONAL_BITS_0 9 /* used as input to fn10Log10() */ 112 113 #define NOISE_FLOOR_CHAN_1 16 /* 1.0 scaled as 27,4 */ 114 #define MIN_CHAN_ENRG_1 1 /* 0.0625 scaled as 27,4 */ 115 #define MIN_NOISE_ENRG_1 1 /* 0.0625 scaled as 27,4 */ 116 #define INE_NOISE_1 256 /* 16.0 scaled as 27,4 */ 117 #define FRACTIONAL_BITS_1 4 /* used as input to fn10Log10() */ 118 119 #define STATE_1_TO_0_SHIFT_R (FRACTIONAL_BITS_1-FRACTIONAL_BITS_0) /* state correction factor */ 120 #define STATE_0_TO_1_SHIFT_R (FRACTIONAL_BITS_0-FRACTIONAL_BITS_1) /* state correction factor */ 121 122 #define HIGH_ALPHA 29491 /* 0.9 scaled as 0,15 */ 123 #define LOW_ALPHA 22938 /* 0.7 scaled as 0,15 */ 124 #define ALPHA_RANGE (HIGH_ALPHA - LOW_ALPHA) 125 #define DEV_THLD 7168 /* 28.0 scaled as 7,8 */ 126 127 #define PRE_EMP_FAC (-26214) /* -0.8 scaled as 0,15 */ 128 129 #define CEE_SM_FAC 18022 /* 0.55 scaled as 0,15 */ 130 #define ONE_MINUS_CEE_SM_FAC 14746 /* 0.45 scaled as 0,15 */ 131 132 #define CNE_SM_FAC 3277 /* 0.1 scaled as 0,15 */ 133 #define ONE_MINUS_CNE_SM_FAC 29491 /* 0.9 scaled as 0,15 */ 134 135 #define FFT_HEADROOM 2 136 /*---------------------------------------------------------------------------- 137 ; EXTERNAL VARIABLES REFERENCES 138 ; Declare variables used in this module but defined elsewhere 139 ----------------------------------------------------------------------------*/ 140 141 /*---------------------------------------------------------------------------- 142 ; SIMPLE TYPEDEF'S 143 ----------------------------------------------------------------------------*/ 144 145 /*---------------------------------------------------------------------------- 146 ; ENUMERATED TYPEDEF'S 147 ----------------------------------------------------------------------------*/ 148 149 /*---------------------------------------------------------------------------- 150 ; STRUCTURES TYPEDEF'S 151 ----------------------------------------------------------------------------*/ 152 153 typedef struct 154 { 155 Word16 pre_emp_mem; 156 Word16 update_cnt; 157 Word16 hyster_cnt; 158 Word16 last_update_cnt; 159 Word16 ch_enrg_long_db[NUM_CHAN]; /* scaled as 7,8 */ 160 161 Word32 Lframe_cnt; 162 Word32 Lch_enrg[NUM_CHAN]; /* scaled as 22,9 or 27,4 */ 163 Word32 Lch_noise[NUM_CHAN]; /* scaled as 22,9 */ 164 165 Word16 last_normb_shift; /* last block norm shift count */ 166 167 Word16 tsnr; /* total signal-to-noise ratio in dB (scaled as 7,8) */ 168 Word16 hangover; 169 Word16 burstcount; 170 Word16 fupdate_flag; /* forced update flag from previous frame */ 171 Word16 negSNRvar; /* Negative SNR variance (scaled as 7,8) */ 172 Word16 negSNRbias; /* sensitivity bias from negative SNR variance (scaled as 15,0) */ 173 174 Word16 shift_state; /* use 22,9 or 27,4 scaling for ch_enrg[] */ 175 176 Word32 L_R0; 177 Word32 L_Rmax; 178 Flag LTP_flag; /* Use to indicate the the LTP gain is > LTP_THRESH */ 179 180 } vadState2; 181 /*---------------------------------------------------------------------------- 182 ; GLOBAL FUNCTION DEFINITIONS 183 ; Function Prototype declaration 184 ----------------------------------------------------------------------------*/ 185 Word16 vad2(Word16 *farray_ptr, vadState2 *st, Flag *pOverflow); 186 Word16 vad2_init(vadState2 **st); 187 Word16 vad2_reset(vadState2 *st); 188 void vad2_exit(vadState2 **state); 189 190 void r_fft(Word16 *farray_ptr, Flag *pOverflow); 191 192 void LTP_flag_update(vadState2 *st, Word16 mode, Flag *pOverflow); 193 194 /*---------------------------------------------------------------------------- 195 ; END 196 ----------------------------------------------------------------------------*/ 197 #ifdef __cplusplus 198 } 199 #endif 200 201 #endif /* _VAD2_H_ */ 202 203 204