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 * ilbc.h 13 * 14 * This header file contains all of the API's for iLBC. 15 * 16 */ 17 18 #ifndef WEBRTC_MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_INTERFACE_ILBC_H_ 19 #define WEBRTC_MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_INTERFACE_ILBC_H_ 20 21 /* 22 * Define the fixpoint numeric formats 23 */ 24 25 #include "webrtc/typedefs.h" 26 27 /* 28 * Solution to support multiple instances 29 * Customer has to cast instance to proper type 30 */ 31 32 typedef struct iLBC_encinst_t_ iLBC_encinst_t; 33 34 typedef struct iLBC_decinst_t_ iLBC_decinst_t; 35 36 /* 37 * Comfort noise constants 38 */ 39 40 #define ILBC_SPEECH 1 41 #define ILBC_CNG 2 42 43 #ifdef __cplusplus 44 extern "C" { 45 #endif 46 47 /**************************************************************************** 48 * WebRtcIlbcfix_XxxAssign(...) 49 * 50 * These functions assigns the encoder/decoder instance to the specified 51 * memory location 52 * 53 * Input: 54 * - XXX_xxxinst : Pointer to created instance that should be 55 * assigned 56 * - ILBCXXX_inst_Addr : Pointer to the desired memory space 57 * - size : The size that this structure occupies (in Word16) 58 * 59 * Return value : 0 - Ok 60 * -1 - Error 61 */ 62 63 int16_t WebRtcIlbcfix_EncoderAssign(iLBC_encinst_t **iLBC_encinst, 64 int16_t *ILBCENC_inst_Addr, 65 int16_t *size); 66 int16_t WebRtcIlbcfix_DecoderAssign(iLBC_decinst_t **iLBC_decinst, 67 int16_t *ILBCDEC_inst_Addr, 68 int16_t *size); 69 70 71 /**************************************************************************** 72 * WebRtcIlbcfix_XxxAssign(...) 73 * 74 * These functions create a instance to the specified structure 75 * 76 * Input: 77 * - XXX_inst : Pointer to created instance that should be created 78 * 79 * Return value : 0 - Ok 80 * -1 - Error 81 */ 82 83 int16_t WebRtcIlbcfix_EncoderCreate(iLBC_encinst_t **iLBC_encinst); 84 int16_t WebRtcIlbcfix_DecoderCreate(iLBC_decinst_t **iLBC_decinst); 85 86 /**************************************************************************** 87 * WebRtcIlbcfix_XxxFree(...) 88 * 89 * These functions frees the dynamic memory of a specified instance 90 * 91 * Input: 92 * - XXX_inst : Pointer to created instance that should be freed 93 * 94 * Return value : 0 - Ok 95 * -1 - Error 96 */ 97 98 int16_t WebRtcIlbcfix_EncoderFree(iLBC_encinst_t *iLBC_encinst); 99 int16_t WebRtcIlbcfix_DecoderFree(iLBC_decinst_t *iLBC_decinst); 100 101 102 /**************************************************************************** 103 * WebRtcIlbcfix_EncoderInit(...) 104 * 105 * This function initializes a iLBC instance 106 * 107 * Input: 108 * - iLBCenc_inst : iLBC instance, i.e. the user that should receive 109 * be initialized 110 * - frameLen : The frame length of the codec 20/30 (ms) 111 * 112 * Return value : 0 - Ok 113 * -1 - Error 114 */ 115 116 int16_t WebRtcIlbcfix_EncoderInit(iLBC_encinst_t *iLBCenc_inst, 117 int16_t frameLen); 118 119 /**************************************************************************** 120 * WebRtcIlbcfix_Encode(...) 121 * 122 * This function encodes one iLBC frame. Input speech length has be a 123 * multiple of the frame length. 124 * 125 * Input: 126 * - iLBCenc_inst : iLBC instance, i.e. the user that should encode 127 * a package 128 * - speechIn : Input speech vector 129 * - len : Samples in speechIn (160, 240, 320 or 480) 130 * 131 * Output: 132 * - encoded : The encoded data vector 133 * 134 * Return value : >0 - Length (in bytes) of coded data 135 * -1 - Error 136 */ 137 138 int16_t WebRtcIlbcfix_Encode(iLBC_encinst_t *iLBCenc_inst, 139 const int16_t *speechIn, 140 int16_t len, 141 int16_t *encoded); 142 143 /**************************************************************************** 144 * WebRtcIlbcfix_DecoderInit(...) 145 * 146 * This function initializes a iLBC instance with either 20 or 30 ms frames 147 * Alternatively the WebRtcIlbcfix_DecoderInit_XXms can be used. Then it's 148 * not needed to specify the frame length with a variable. 149 * 150 * Input: 151 * - iLBC_decinst_t : iLBC instance, i.e. the user that should receive 152 * be initialized 153 * - frameLen : The frame length of the codec 20/30 (ms) 154 * 155 * Return value : 0 - Ok 156 * -1 - Error 157 */ 158 159 int16_t WebRtcIlbcfix_DecoderInit(iLBC_decinst_t *iLBCdec_inst, 160 int16_t frameLen); 161 int16_t WebRtcIlbcfix_DecoderInit20Ms(iLBC_decinst_t *iLBCdec_inst); 162 int16_t WebRtcIlbcfix_Decoderinit30Ms(iLBC_decinst_t *iLBCdec_inst); 163 164 /**************************************************************************** 165 * WebRtcIlbcfix_Decode(...) 166 * 167 * This function decodes a packet with iLBC frame(s). Output speech length 168 * will be a multiple of 160 or 240 samples ((160 or 240)*frames/packet). 169 * 170 * Input: 171 * - iLBCdec_inst : iLBC instance, i.e. the user that should decode 172 * a packet 173 * - encoded : Encoded iLBC frame(s) 174 * - len : Bytes in encoded vector 175 * 176 * Output: 177 * - decoded : The decoded vector 178 * - speechType : 1 normal, 2 CNG 179 * 180 * Return value : >0 - Samples in decoded vector 181 * -1 - Error 182 */ 183 184 int16_t WebRtcIlbcfix_Decode(iLBC_decinst_t *iLBCdec_inst, 185 const int16_t* encoded, 186 int16_t len, 187 int16_t *decoded, 188 int16_t *speechType); 189 int16_t WebRtcIlbcfix_Decode20Ms(iLBC_decinst_t *iLBCdec_inst, 190 const int16_t *encoded, 191 int16_t len, 192 int16_t *decoded, 193 int16_t *speechType); 194 int16_t WebRtcIlbcfix_Decode30Ms(iLBC_decinst_t *iLBCdec_inst, 195 const int16_t *encoded, 196 int16_t len, 197 int16_t *decoded, 198 int16_t *speechType); 199 200 /**************************************************************************** 201 * WebRtcIlbcfix_DecodePlc(...) 202 * 203 * This function conducts PLC for iLBC frame(s). Output speech length 204 * will be a multiple of 160 or 240 samples. 205 * 206 * Input: 207 * - iLBCdec_inst : iLBC instance, i.e. the user that should perform 208 * a PLC 209 * - noOfLostFrames : Number of PLC frames to produce 210 * 211 * Output: 212 * - decoded : The "decoded" vector 213 * 214 * Return value : >0 - Samples in decoded PLC vector 215 * -1 - Error 216 */ 217 218 int16_t WebRtcIlbcfix_DecodePlc(iLBC_decinst_t *iLBCdec_inst, 219 int16_t *decoded, 220 int16_t noOfLostFrames); 221 222 /**************************************************************************** 223 * WebRtcIlbcfix_NetEqPlc(...) 224 * 225 * This function updates the decoder when a packet loss has occured, but it 226 * does not produce any PLC data. Function can be used if another PLC method 227 * is used (i.e NetEq). 228 * 229 * Input: 230 * - iLBCdec_inst : iLBC instance that should be updated 231 * - noOfLostFrames : Number of lost frames 232 * 233 * Output: 234 * - decoded : The "decoded" vector (nothing in this case) 235 * 236 * Return value : >0 - Samples in decoded PLC vector 237 * -1 - Error 238 */ 239 240 int16_t WebRtcIlbcfix_NetEqPlc(iLBC_decinst_t *iLBCdec_inst, 241 int16_t *decoded, 242 int16_t noOfLostFrames); 243 244 /**************************************************************************** 245 * WebRtcIlbcfix_version(...) 246 * 247 * This function returns the version number of iLBC 248 * 249 * Output: 250 * - version : Version number of iLBC (maximum 20 char) 251 */ 252 253 void WebRtcIlbcfix_version(char *version); 254 255 #ifdef __cplusplus 256 } 257 #endif 258 259 #endif 260
