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_ILBC_H_ 19 #define WEBRTC_MODULES_AUDIO_CODING_CODECS_ILBC_ILBC_H_ 20 21 #include <stddef.h> 22 23 /* 24 * Define the fixpoint numeric formats 25 */ 26 27 #include "webrtc/typedefs.h" 28 29 /* 30 * Solution to support multiple instances 31 * Customer has to cast instance to proper type 32 */ 33 34 typedef struct iLBC_encinst_t_ IlbcEncoderInstance; 35 36 typedef struct iLBC_decinst_t_ IlbcDecoderInstance; 37 38 /* 39 * Comfort noise constants 40 */ 41 42 #define ILBC_SPEECH 1 43 #define ILBC_CNG 2 44 45 #ifdef __cplusplus 46 extern "C" { 47 #endif 48 49 /**************************************************************************** 50 * WebRtcIlbcfix_XxxAssign(...) 51 * 52 * These functions assigns the encoder/decoder instance to the specified 53 * memory location 54 * 55 * Input: 56 * - XXX_xxxinst : Pointer to created instance that should be 57 * assigned 58 * - ILBCXXX_inst_Addr : Pointer to the desired memory space 59 * - size : The size that this structure occupies (in Word16) 60 * 61 * Return value : 0 - Ok 62 * -1 - Error 63 */ 64 65 int16_t WebRtcIlbcfix_EncoderAssign(IlbcEncoderInstance **iLBC_encinst, 66 int16_t *ILBCENC_inst_Addr, 67 int16_t *size); 68 int16_t WebRtcIlbcfix_DecoderAssign(IlbcDecoderInstance **iLBC_decinst, 69 int16_t *ILBCDEC_inst_Addr, 70 int16_t *size); 71 72 73 /**************************************************************************** 74 * WebRtcIlbcfix_XxxAssign(...) 75 * 76 * These functions create a instance to the specified structure 77 * 78 * Input: 79 * - XXX_inst : Pointer to created instance that should be created 80 * 81 * Return value : 0 - Ok 82 * -1 - Error 83 */ 84 85 int16_t WebRtcIlbcfix_EncoderCreate(IlbcEncoderInstance **iLBC_encinst); 86 int16_t WebRtcIlbcfix_DecoderCreate(IlbcDecoderInstance **iLBC_decinst); 87 88 /**************************************************************************** 89 * WebRtcIlbcfix_XxxFree(...) 90 * 91 * These functions frees the dynamic memory of a specified instance 92 * 93 * Input: 94 * - XXX_inst : Pointer to created instance that should be freed 95 * 96 * Return value : 0 - Ok 97 * -1 - Error 98 */ 99 100 int16_t WebRtcIlbcfix_EncoderFree(IlbcEncoderInstance *iLBC_encinst); 101 int16_t WebRtcIlbcfix_DecoderFree(IlbcDecoderInstance *iLBC_decinst); 102 103 104 /**************************************************************************** 105 * WebRtcIlbcfix_EncoderInit(...) 106 * 107 * This function initializes a iLBC instance 108 * 109 * Input: 110 * - iLBCenc_inst : iLBC instance, i.e. the user that should receive 111 * be initialized 112 * - frameLen : The frame length of the codec 20/30 (ms) 113 * 114 * Return value : 0 - Ok 115 * -1 - Error 116 */ 117 118 int16_t WebRtcIlbcfix_EncoderInit(IlbcEncoderInstance *iLBCenc_inst, 119 int16_t frameLen); 120 121 /**************************************************************************** 122 * WebRtcIlbcfix_Encode(...) 123 * 124 * This function encodes one iLBC frame. Input speech length has be a 125 * multiple of the frame length. 126 * 127 * Input: 128 * - iLBCenc_inst : iLBC instance, i.e. the user that should encode 129 * a package 130 * - speechIn : Input speech vector 131 * - len : Samples in speechIn (160, 240, 320 or 480) 132 * 133 * Output: 134 * - encoded : The encoded data vector 135 * 136 * Return value : >0 - Length (in bytes) of coded data 137 * -1 - Error 138 */ 139 140 int WebRtcIlbcfix_Encode(IlbcEncoderInstance *iLBCenc_inst, 141 const int16_t *speechIn, 142 size_t len, 143 uint8_t* encoded); 144 145 /**************************************************************************** 146 * WebRtcIlbcfix_DecoderInit(...) 147 * 148 * This function initializes a iLBC instance with either 20 or 30 ms frames 149 * Alternatively the WebRtcIlbcfix_DecoderInit_XXms can be used. Then it's 150 * not needed to specify the frame length with a variable. 151 * 152 * Input: 153 * - IlbcDecoderInstance : iLBC decoder instance 154 * - frameLen : The frame length of the codec 20/30 (ms) 155 * 156 * Return value : 0 - Ok 157 * -1 - Error 158 */ 159 160 int16_t WebRtcIlbcfix_DecoderInit(IlbcDecoderInstance *iLBCdec_inst, 161 int16_t frameLen); 162 void WebRtcIlbcfix_DecoderInit20Ms(IlbcDecoderInstance* iLBCdec_inst); 163 void WebRtcIlbcfix_Decoderinit30Ms(IlbcDecoderInstance* iLBCdec_inst); 164 165 /**************************************************************************** 166 * WebRtcIlbcfix_Decode(...) 167 * 168 * This function decodes a packet with iLBC frame(s). Output speech length 169 * will be a multiple of 160 or 240 samples ((160 or 240)*frames/packet). 170 * 171 * Input: 172 * - iLBCdec_inst : iLBC instance, i.e. the user that should decode 173 * a packet 174 * - encoded : Encoded iLBC frame(s) 175 * - len : Bytes in encoded vector 176 * 177 * Output: 178 * - decoded : The decoded vector 179 * - speechType : 1 normal, 2 CNG 180 * 181 * Return value : >0 - Samples in decoded vector 182 * -1 - Error 183 */ 184 185 int WebRtcIlbcfix_Decode(IlbcDecoderInstance* iLBCdec_inst, 186 const uint8_t* encoded, 187 size_t len, 188 int16_t* decoded, 189 int16_t* speechType); 190 int WebRtcIlbcfix_Decode20Ms(IlbcDecoderInstance* iLBCdec_inst, 191 const uint8_t* encoded, 192 size_t len, 193 int16_t* decoded, 194 int16_t* speechType); 195 int WebRtcIlbcfix_Decode30Ms(IlbcDecoderInstance* iLBCdec_inst, 196 const uint8_t* encoded, 197 size_t len, 198 int16_t* decoded, 199 int16_t* speechType); 200 201 /**************************************************************************** 202 * WebRtcIlbcfix_DecodePlc(...) 203 * 204 * This function conducts PLC for iLBC frame(s). Output speech length 205 * will be a multiple of 160 or 240 samples. 206 * 207 * Input: 208 * - iLBCdec_inst : iLBC instance, i.e. the user that should perform 209 * a PLC 210 * - noOfLostFrames : Number of PLC frames to produce 211 * 212 * Output: 213 * - decoded : The "decoded" vector 214 * 215 * Return value : Samples in decoded PLC vector 216 */ 217 218 size_t WebRtcIlbcfix_DecodePlc(IlbcDecoderInstance *iLBCdec_inst, 219 int16_t *decoded, 220 size_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 : Samples in decoded PLC vector 237 */ 238 239 size_t WebRtcIlbcfix_NetEqPlc(IlbcDecoderInstance *iLBCdec_inst, 240 int16_t *decoded, 241 size_t noOfLostFrames); 242 243 /**************************************************************************** 244 * WebRtcIlbcfix_version(...) 245 * 246 * This function returns the version number of iLBC 247 * 248 * Output: 249 * - version : Version number of iLBC (maximum 20 char) 250 */ 251 252 void WebRtcIlbcfix_version(char *version); 253 254 #ifdef __cplusplus 255 } 256 #endif 257 258 #endif // WEBRTC_MODULES_AUDIO_CODING_CODECS_ILBC_ILBC_H_ 259
