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 ------------------------------------------------------------------------------ 31 32 33 34 Filename: /audio/gsm_amr/c/src/include/dtx_enc.h 35 36 Date: 01/29/2002 37 38 ------------------------------------------------------------------------------ 39 REVISION HISTORY 40 41 Description: Replaced "int" and/or "char" with OSCL defined types. 42 43 Description: Moved _cplusplus #ifdef after Include section. 44 45 Description: 46 47 ------------------------------------------------------------------------------ 48 INCLUDE DESCRIPTION 49 50 File : dtx_enc.h 51 Purpose : DTX mode computation of SID parameters 52 53 ------------------------------------------------------------------------------ 54 */ 55 56 #ifndef dtx_enc_h 57 #define dtx_enc_h "$Id $" 58 59 /*---------------------------------------------------------------------------- 60 ; INCLUDES 61 ----------------------------------------------------------------------------*/ 62 #include "typedef.h" 63 #include "cnst.h" 64 #include "q_plsf.h" 65 #include "gc_pred.h" 66 #include "mode.h" 67 #include "dtx_common_def.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 /*---------------------------------------------------------------------------- 86 ; EXTERNAL VARIABLES REFERENCES 87 ; [Declare variables used in this module but defined elsewhere] 88 ----------------------------------------------------------------------------*/ 89 extern const Word16 lsp_init_data[]; 90 /*---------------------------------------------------------------------------- 91 ; SIMPLE TYPEDEF'S 92 ----------------------------------------------------------------------------*/ 93 94 /*---------------------------------------------------------------------------- 95 ; ENUMERATED TYPEDEF'S 96 ----------------------------------------------------------------------------*/ 97 98 /*---------------------------------------------------------------------------- 99 ; STRUCTURES TYPEDEF'S 100 ----------------------------------------------------------------------------*/ 101 typedef struct 102 { 103 Word16 lsp_hist[M * DTX_HIST_SIZE]; 104 Word16 log_en_hist[DTX_HIST_SIZE]; 105 Word16 hist_ptr; 106 Word16 log_en_index; 107 Word16 init_lsf_vq_index; 108 Word16 lsp_index[3]; 109 110 /* DTX handler stuff */ 111 Word16 dtxHangoverCount; 112 Word16 decAnaElapsedCount; 113 114 } dtx_encState; 115 116 /*---------------------------------------------------------------------------- 117 ; GLOBAL FUNCTION DEFINITIONS 118 ; [List function prototypes here] 119 ----------------------------------------------------------------------------*/ 120 /* 121 ************************************************************************** 122 * Function : dtx_enc_init 123 * Purpose : Allocates memory and initializes state variables 124 * Description : Stores pointer to filter status struct in *st. This 125 * pointer has to be passed to dtx_enc in each call. 126 * Returns : 0 on success 127 * 128 ************************************************************************** 129 */ 130 Word16 dtx_enc_init(dtx_encState **st); 131 132 /* 133 ************************************************************************** 134 * 135 * Function : dtx_enc_reset 136 * Purpose : Resets state memory 137 * Returns : 0 on success 138 * 139 ************************************************************************** 140 */ 141 Word16 dtx_enc_reset(dtx_encState *st); 142 143 /* 144 ************************************************************************** 145 * 146 * Function : dtx_enc_exit 147 * Purpose : The memory used for state memory is freed 148 * Description : Stores NULL in *st 149 * 150 ************************************************************************** 151 */ 152 void dtx_enc_exit(dtx_encState **st); 153 154 /* 155 ************************************************************************** 156 * 157 * Function : dtx_enc 158 * Purpose : 159 * Description : 160 * 161 ************************************************************************** 162 */ 163 void dtx_enc(dtx_encState *st, /* i/o : State struct */ 164 Word16 computeSidFlag, /* i : compute SID */ 165 Q_plsfState *qSt, /* i/o : Qunatizer state struct */ 166 gc_predState* predState, /* i/o : State struct */ 167 Word16 **anap, /* o : analysis parameters */ 168 Flag *pOverflow /* i/o : overflow indicator */ 169 ); 170 171 /* 172 ************************************************************************** 173 * 174 * Function : dtx_buffer 175 * Purpose : handles the DTX buffer 176 * 177 ************************************************************************** 178 */ 179 void dtx_buffer(dtx_encState *st, /* i/o : State struct */ 180 Word16 lsp_new[], /* i : LSP vector */ 181 Word16 speech[], /* i : speech samples */ 182 Flag *pOverflow /* i/o : overflow indicator */ 183 ); 184 185 /* 186 ************************************************************************** 187 * 188 * Function : tx_dtx_handler 189 * Purpose : adds extra speech hangover to analyze speech on the decoding side. 190 * Description : returns 1 when a new SID analysis may be made 191 * otherwise it adds the appropriate hangover after a sequence 192 * with out updates of SID parameters . 193 * 194 ************************************************************************** 195 */ 196 Word16 tx_dtx_handler(dtx_encState *st, /* i/o : State struct */ 197 Word16 vad_flag, /* i : vad decision */ 198 enum Mode *usedMode, /* i/o : mode changed or not */ 199 Flag *pOverflow /* i/o : overflow indicator */ 200 ); 201 202 203 #ifdef __cplusplus 204 } 205 #endif 206 207 #endif /* _dtx_enc_h_ */ 208 209 210
