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 26.173 22 ANSI-C code for the Adaptive Multi-Rate - Wideband (AMR-WB) speech codec 23 Available from http://www.3gpp.org 24 25 (C) 2007, 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 Pathname: ./cpp/include/pvamrwbdecoder_acelp.h 35 36 Date: 01/04/2007 37 38 ------------------------------------------------------------------------------ 39 REVISION HISTORY 40 41 Description: 42 ------------------------------------------------------------------------------ 43 INCLUDE DESCRIPTION 44 45 ------------------------------------------------------------------------------ 46 */ 47 48 #ifndef PVAMRWBDECODER_ACELP_H 49 #define PVAMRWBDECODER_ACELP_H 50 51 52 /*---------------------------------------------------------------------------- 53 ; INCLUDES 54 ----------------------------------------------------------------------------*/ 55 56 #include "pv_amr_wb_type_defs.h" 57 #include "pvamrwbdecoder_mem_funcs.h" 58 59 #ifdef __cplusplus 60 extern "C" 61 { 62 #endif 63 64 /*-----------------------------------------------------------------* 65 * LPC prototypes * 66 *-----------------------------------------------------------------*/ 67 68 void isf_extrapolation(int16 HfIsf[]); 69 70 void Init_Lagconc(int16 lag_hist[]); 71 void lagconceal( 72 int16 gain_hist[], /* (i) : Gain history */ 73 int16 lag_hist[], /* (i) : Subframe size */ 74 int16 * T0, 75 int16 * old_T0, 76 int16 * seed, 77 int16 unusable_frame 78 ); 79 80 void agc2_amr_wb( 81 int16 * sig_in, /* input : postfilter input signal */ 82 int16 * sig_out, /* in/out: postfilter output signal */ 83 int16 l_trm /* input : subframe size */ 84 ); 85 86 void low_pass_filt_7k_init(int16 mem[]); 87 void low_pass_filt_7k( 88 int16 signal[], /* input: signal */ 89 int16 lg, /* input: length of input */ 90 int16 mem[], /* in/out: memory (size=30) */ 91 int16 x[] 92 ); 93 94 int16 median5(int16 x[]); 95 96 void Isp_Az( 97 int16 isp[], /* (i) Q15 : Immittance spectral pairs */ 98 int16 a[], /* (o) Q12 : predictor coefficients (order = M) */ 99 int16 m, 100 int16 adaptive_scaling /* (i) 0 : adaptive scaling disabled */ 101 /* 1 : adaptive scaling enabled */ 102 ); 103 void Isf_isp( 104 int16 isf[], /* (i) Q15 : isf[m] normalized (range: 0.0<=val<=0.5) */ 105 int16 isp[], /* (o) Q15 : isp[m] (range: -1<=val<1) */ 106 int16 m /* (i) : LPC order */ 107 ); 108 void interpolate_isp( 109 int16 isp_old[], /* input : isps from past frame */ 110 int16 isp_new[], /* input : isps from present frame */ 111 const int16 frac[], /* input : fraction for 3 first subfr (Q15) */ 112 int16 Az[] /* output: LP coefficients in 4 subframes */ 113 ); 114 void weight_amrwb_lpc( 115 int16 a[], /* (i) Q12 : a[m+1] LPC coefficients */ 116 int16 ap[], /* (o) Q12 : Spectral expanded LPC coefficients */ 117 int16 gamma, /* (i) Q15 : Spectral expansion factor. */ 118 int16 m /* (i) : LPC order. */ 119 ); 120 121 122 /*-----------------------------------------------------------------* 123 * isf quantizers * 124 *-----------------------------------------------------------------*/ 125 126 void Disf_ns( 127 int16 * indice, /* input: quantization indices */ 128 int16 * isf_q /* input : ISF in the frequency domain (0..0.5) */ 129 ); 130 131 void Dpisf_2s_46b( 132 int16 * indice, /* input: quantization indices */ 133 int16 * isf_q, /* output: quantized ISF in frequency domain (0..0.5) */ 134 int16 * past_isfq, /* i/0 : past ISF quantizer */ 135 int16 * isfold, /* input : past quantized ISF */ 136 int16 * isf_buf, /* input : isf buffer */ 137 int16 bfi, /* input : Bad frame indicator */ 138 int16 enc_dec 139 ); 140 void Dpisf_2s_36b( 141 int16 * indice, /* input: quantization indices */ 142 int16 * isf_q, /* output: quantized ISF in frequency domain (0..0.5) */ 143 int16 * past_isfq, /* i/0 : past ISF quantizer */ 144 int16 * isfold, /* input : past quantized ISF */ 145 int16 * isf_buf, /* input : isf buffer */ 146 int16 bfi, /* input : Bad frame indicator */ 147 int16 enc_dec 148 ); 149 150 151 void Reorder_isf( 152 int16 * isf, /* (i/o) Q15: ISF in the frequency domain (0..0.5) */ 153 int16 min_dist, /* (i) Q15 : minimum distance to keep */ 154 int16 n /* (i) : number of ISF */ 155 ); 156 157 /*-----------------------------------------------------------------* 158 * filter prototypes * 159 *-----------------------------------------------------------------*/ 160 161 void oversamp_12k8_to_16k_init( 162 int16 mem[] /* output: memory (2*NB_COEF_UP) set to zeros */ 163 ); 164 void oversamp_12k8_to_16k( 165 int16 sig12k8[], /* input: signal to oversampling */ 166 int16 lg, /* input: length of input */ 167 int16 sig16k[], /* output: oversampled signal */ 168 int16 mem[], /* in/out: memory (2*NB_COEF_UP) */ 169 int16 signal[] 170 ); 171 172 void highpass_50Hz_at_12k8_init(int16 mem[]); 173 void highpass_50Hz_at_12k8( 174 int16 signal[], /* input/output signal */ 175 int16 lg, /* lenght of signal */ 176 int16 mem[] /* filter memory [6] */ 177 ); 178 void highpass_400Hz_at_12k8_init(int16 mem[]); 179 void highpass_400Hz_at_12k8( 180 int16 signal[], /* input/output signal */ 181 int16 lg, /* lenght of signal */ 182 int16 mem[] /* filter memory [6] */ 183 ); 184 185 void band_pass_6k_7k_init(int16 mem[]); 186 void band_pass_6k_7k( 187 int16 signal[], /* input: signal */ 188 int16 lg, /* input: length of input */ 189 int16 mem[], /* in/out: memory (size=30) */ 190 int16 x[] 191 ); 192 193 194 void preemph_amrwb_dec( 195 int16 x[], /* (i/o) : input signal overwritten by the output */ 196 int16 mu, /* (i) Q15 : preemphasis coefficient */ 197 int16 lg /* (i) : lenght of filtering */ 198 ); 199 200 void deemphasis_32( 201 int16 x_hi[], /* (i) : input signal (bit31..16) */ 202 int16 x_lo[], /* (i) : input signal (bit15..4) */ 203 int16 y[], /* (o) : output signal (x16) */ 204 int16 mu, /* (i) Q15 : deemphasis factor */ 205 int16 L, /* (i) : vector size */ 206 int16 * mem /* (i/o) : memory (y[-1]) */ 207 ); 208 209 210 void wb_syn_filt( 211 int16 a[], /* (i) Q12 : a[m+1] prediction coefficients */ 212 int16 m, /* (i) : order of LP filter */ 213 int16 x[], /* (i) : input signal */ 214 int16 y[], /* (o) : output signal */ 215 int16 lg, /* (i) : size of filtering */ 216 int16 mem[], /* (i/o) : memory associated with this filtering. */ 217 int16 update, /* (i) : 0=no update, 1=update of memory. */ 218 int16 y_buf[] 219 ); 220 void Syn_filt_32( 221 int16 a[], /* (i) Q12 : a[m+1] prediction coefficients */ 222 int16 m, /* (i) : order of LP filter */ 223 int16 exc[], /* (i) Qnew: excitation (exc[i] >> Qnew) */ 224 int16 Qnew, /* (i) : exc scaling = 0(min) to 8(max) */ 225 int16 sig_hi[], /* (o) /16 : synthesis high */ 226 int16 sig_lo[], /* (o) /16 : synthesis low */ 227 int16 lg /* (i) : size of filtering */ 228 ); 229 230 /*-----------------------------------------------------------------* 231 * pitch prototypes * 232 *-----------------------------------------------------------------*/ 233 234 235 void Pred_lt4( 236 int16 exc[], /* in/out: excitation buffer */ 237 int16 T0, /* input : integer pitch lag */ 238 int16 frac, /* input : fraction of lag */ 239 int16 L_subfr /* input : subframe size */ 240 ); 241 242 /*-----------------------------------------------------------------* 243 * gain prototypes * 244 *-----------------------------------------------------------------*/ 245 246 247 void dec_gain2_amr_wb_init( 248 int16 * mem /* output : memory (4 words) */ 249 ); 250 void dec_gain2_amr_wb( 251 int16 index, /* (i) :index of quantization. */ 252 int16 nbits, /* (i) : number of bits (6 or 7) */ 253 int16 code[], /* (i) Q9 :Innovative vector. */ 254 int16 L_subfr, /* (i) :Subframe lenght. */ 255 int16 * gain_pit, /* (o) Q14 :Pitch gain. */ 256 int32 * gain_cod, /* (o) Q16 :Code gain. */ 257 int16 bfi, /* (i) :bad frame indicator */ 258 int16 prev_bfi, /* (i) : Previous BF indicator */ 259 int16 state, /* (i) : State of BFH */ 260 int16 unusable_frame, /* (i) : UF indicator */ 261 int16 vad_hist, /* (i) :number of non-speech frames */ 262 int16 * mem /* (i/o) : memory (4 words) */ 263 ); 264 265 /*-----------------------------------------------------------------* 266 * acelp prototypes * 267 *-----------------------------------------------------------------*/ 268 269 void dec_acelp_2p_in_64( 270 int16 index, /* (i) : 12 bits index */ 271 int16 code[] /* (o) :Q9 algebraic (fixed) codebook excitation */ 272 ); 273 274 void dec_acelp_4p_in_64( 275 int16 index[], /* (i) : index (20): 5+5+5+5 = 20 bits. */ 276 /* (i) : index (36): 9+9+9+9 = 36 bits. */ 277 /* (i) : index (44): 13+9+13+9 = 44 bits. */ 278 /* (i) : index (52): 13+13+13+13 = 52 bits. */ 279 /* (i) : index (64): 2+2+2+2+14+14+14+14 = 64 bits. */ 280 /* (i) : index (72): 10+2+10+2+10+14+10+14 = 72 bits. */ 281 /* (i) : index (88): 11+11+11+11+11+11+11+11 = 88 bits. */ 282 int16 nbbits, /* (i) : 20, 36, 44, 52, 64, 72 or 88 bits */ 283 int16 code[] /* (o) Q9: algebraic (fixed) codebook excitation */ 284 ); 285 void Pit_shrp( 286 int16 * x, /* in/out: impulse response (or algebraic code) */ 287 int16 pit_lag, /* input : pitch lag */ 288 int16 sharp, /* input : pitch sharpening factor (Q15) */ 289 int16 L_subfr /* input : subframe size */ 290 ); 291 292 293 /*-----------------------------------------------------------------* 294 * others prototypes * 295 *-----------------------------------------------------------------*/ 296 297 int16 voice_factor( /* (o) Q15 : factor (-1=unvoiced to 1=voiced) */ 298 int16 exc[], /* (i) Q_exc: pitch excitation */ 299 int16 Q_exc, /* (i) : exc format */ 300 int16 gain_pit, /* (i) Q14 : gain of pitch */ 301 int16 code[], /* (i) Q9 : Fixed codebook excitation */ 302 int16 gain_code, /* (i) Q0 : gain of code */ 303 int16 L_subfr /* (i) : subframe length */ 304 ); 305 306 void scale_signal( 307 int16 x[], /* (i/o) : signal to scale */ 308 int16 lg, /* (i) : size of x[] */ 309 int16 exp /* (i) : exponent: x = round(x << exp) */ 310 ); 311 312 int16 noise_gen_amrwb(int16 * seed); 313 314 315 void phase_dispersion( 316 int16 gain_code, /* (i) Q0 : gain of code */ 317 int16 gain_pit, /* (i) Q14 : gain of pitch */ 318 int16 code[], /* (i/o) : code vector */ 319 int16 mode, /* (i) : level, 0=hi, 1=lo, 2=off */ 320 int16 disp_mem[], /* (i/o) : memory (size = 8) */ 321 int16 ScratchMem[] 322 ); 323 324 #ifdef __cplusplus 325 } 326 #endif 327 328 #endif /* ACELP_H */ 329 330
