1 /*********************************************************************** 2 Copyright (c) 2006-2011, Skype Limited. All rights reserved. 3 Redistribution and use in source and binary forms, with or without 4 modification, are permitted provided that the following conditions 5 are met: 6 - Redistributions of source code must retain the above copyright notice, 7 this list of conditions and the following disclaimer. 8 - Redistributions in binary form must reproduce the above copyright 9 notice, this list of conditions and the following disclaimer in the 10 documentation and/or other materials provided with the distribution. 11 - Neither the name of Internet Society, IETF or IETF Trust, nor the 12 names of specific contributors, may be used to endorse or promote 13 products derived from this software without specific prior written 14 permission. 15 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 16 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 19 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 20 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 21 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 22 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 23 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 24 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 25 POSSIBILITY OF SUCH DAMAGE. 26 ***********************************************************************/ 27 28 #ifndef SILK_MAIN_H 29 #define SILK_MAIN_H 30 31 #include "SigProc_FIX.h" 32 #include "define.h" 33 #include "structs.h" 34 #include "tables.h" 35 #include "PLC.h" 36 #include "control.h" 37 #include "debug.h" 38 #include "entenc.h" 39 #include "entdec.h" 40 41 #if defined(OPUS_X86_MAY_HAVE_SSE4_1) 42 #include "x86/main_sse.h" 43 #endif 44 45 #if (defined(OPUS_ARM_ASM) || defined(OPUS_ARM_MAY_HAVE_NEON_INTR)) 46 #include "arm/NSQ_del_dec_arm.h" 47 #endif 48 49 /* Convert Left/Right stereo signal to adaptive Mid/Side representation */ 50 void silk_stereo_LR_to_MS( 51 stereo_enc_state *state, /* I/O State */ 52 opus_int16 x1[], /* I/O Left input signal, becomes mid signal */ 53 opus_int16 x2[], /* I/O Right input signal, becomes side signal */ 54 opus_int8 ix[ 2 ][ 3 ], /* O Quantization indices */ 55 opus_int8 *mid_only_flag, /* O Flag: only mid signal coded */ 56 opus_int32 mid_side_rates_bps[], /* O Bitrates for mid and side signals */ 57 opus_int32 total_rate_bps, /* I Total bitrate */ 58 opus_int prev_speech_act_Q8, /* I Speech activity level in previous frame */ 59 opus_int toMono, /* I Last frame before a stereo->mono transition */ 60 opus_int fs_kHz, /* I Sample rate (kHz) */ 61 opus_int frame_length /* I Number of samples */ 62 ); 63 64 /* Convert adaptive Mid/Side representation to Left/Right stereo signal */ 65 void silk_stereo_MS_to_LR( 66 stereo_dec_state *state, /* I/O State */ 67 opus_int16 x1[], /* I/O Left input signal, becomes mid signal */ 68 opus_int16 x2[], /* I/O Right input signal, becomes side signal */ 69 const opus_int32 pred_Q13[], /* I Predictors */ 70 opus_int fs_kHz, /* I Samples rate (kHz) */ 71 opus_int frame_length /* I Number of samples */ 72 ); 73 74 /* Find least-squares prediction gain for one signal based on another and quantize it */ 75 opus_int32 silk_stereo_find_predictor( /* O Returns predictor in Q13 */ 76 opus_int32 *ratio_Q14, /* O Ratio of residual and mid energies */ 77 const opus_int16 x[], /* I Basis signal */ 78 const opus_int16 y[], /* I Target signal */ 79 opus_int32 mid_res_amp_Q0[], /* I/O Smoothed mid, residual norms */ 80 opus_int length, /* I Number of samples */ 81 opus_int smooth_coef_Q16 /* I Smoothing coefficient */ 82 ); 83 84 /* Quantize mid/side predictors */ 85 void silk_stereo_quant_pred( 86 opus_int32 pred_Q13[], /* I/O Predictors (out: quantized) */ 87 opus_int8 ix[ 2 ][ 3 ] /* O Quantization indices */ 88 ); 89 90 /* Entropy code the mid/side quantization indices */ 91 void silk_stereo_encode_pred( 92 ec_enc *psRangeEnc, /* I/O Compressor data structure */ 93 opus_int8 ix[ 2 ][ 3 ] /* I Quantization indices */ 94 ); 95 96 /* Entropy code the mid-only flag */ 97 void silk_stereo_encode_mid_only( 98 ec_enc *psRangeEnc, /* I/O Compressor data structure */ 99 opus_int8 mid_only_flag 100 ); 101 102 /* Decode mid/side predictors */ 103 void silk_stereo_decode_pred( 104 ec_dec *psRangeDec, /* I/O Compressor data structure */ 105 opus_int32 pred_Q13[] /* O Predictors */ 106 ); 107 108 /* Decode mid-only flag */ 109 void silk_stereo_decode_mid_only( 110 ec_dec *psRangeDec, /* I/O Compressor data structure */ 111 opus_int *decode_only_mid /* O Flag that only mid channel has been coded */ 112 ); 113 114 /* Encodes signs of excitation */ 115 void silk_encode_signs( 116 ec_enc *psRangeEnc, /* I/O Compressor data structure */ 117 const opus_int8 pulses[], /* I pulse signal */ 118 opus_int length, /* I length of input */ 119 const opus_int signalType, /* I Signal type */ 120 const opus_int quantOffsetType, /* I Quantization offset type */ 121 const opus_int sum_pulses[ MAX_NB_SHELL_BLOCKS ] /* I Sum of absolute pulses per block */ 122 ); 123 124 /* Decodes signs of excitation */ 125 void silk_decode_signs( 126 ec_dec *psRangeDec, /* I/O Compressor data structure */ 127 opus_int16 pulses[], /* I/O pulse signal */ 128 opus_int length, /* I length of input */ 129 const opus_int signalType, /* I Signal type */ 130 const opus_int quantOffsetType, /* I Quantization offset type */ 131 const opus_int sum_pulses[ MAX_NB_SHELL_BLOCKS ] /* I Sum of absolute pulses per block */ 132 ); 133 134 /* Check encoder control struct */ 135 opus_int check_control_input( 136 silk_EncControlStruct *encControl /* I Control structure */ 137 ); 138 139 /* Control internal sampling rate */ 140 opus_int silk_control_audio_bandwidth( 141 silk_encoder_state *psEncC, /* I/O Pointer to Silk encoder state */ 142 silk_EncControlStruct *encControl /* I Control structure */ 143 ); 144 145 /* Control SNR of redidual quantizer */ 146 opus_int silk_control_SNR( 147 silk_encoder_state *psEncC, /* I/O Pointer to Silk encoder state */ 148 opus_int32 TargetRate_bps /* I Target max bitrate (bps) */ 149 ); 150 151 /***************/ 152 /* Shell coder */ 153 /***************/ 154 155 /* Encode quantization indices of excitation */ 156 void silk_encode_pulses( 157 ec_enc *psRangeEnc, /* I/O compressor data structure */ 158 const opus_int signalType, /* I Signal type */ 159 const opus_int quantOffsetType, /* I quantOffsetType */ 160 opus_int8 pulses[], /* I quantization indices */ 161 const opus_int frame_length /* I Frame length */ 162 ); 163 164 /* Shell encoder, operates on one shell code frame of 16 pulses */ 165 void silk_shell_encoder( 166 ec_enc *psRangeEnc, /* I/O compressor data structure */ 167 const opus_int *pulses0 /* I data: nonnegative pulse amplitudes */ 168 ); 169 170 /* Shell decoder, operates on one shell code frame of 16 pulses */ 171 void silk_shell_decoder( 172 opus_int16 *pulses0, /* O data: nonnegative pulse amplitudes */ 173 ec_dec *psRangeDec, /* I/O Compressor data structure */ 174 const opus_int pulses4 /* I number of pulses per pulse-subframe */ 175 ); 176 177 /* Gain scalar quantization with hysteresis, uniform on log scale */ 178 void silk_gains_quant( 179 opus_int8 ind[ MAX_NB_SUBFR ], /* O gain indices */ 180 opus_int32 gain_Q16[ MAX_NB_SUBFR ], /* I/O gains (quantized out) */ 181 opus_int8 *prev_ind, /* I/O last index in previous frame */ 182 const opus_int conditional, /* I first gain is delta coded if 1 */ 183 const opus_int nb_subfr /* I number of subframes */ 184 ); 185 186 /* Gains scalar dequantization, uniform on log scale */ 187 void silk_gains_dequant( 188 opus_int32 gain_Q16[ MAX_NB_SUBFR ], /* O quantized gains */ 189 const opus_int8 ind[ MAX_NB_SUBFR ], /* I gain indices */ 190 opus_int8 *prev_ind, /* I/O last index in previous frame */ 191 const opus_int conditional, /* I first gain is delta coded if 1 */ 192 const opus_int nb_subfr /* I number of subframes */ 193 ); 194 195 /* Compute unique identifier of gain indices vector */ 196 opus_int32 silk_gains_ID( /* O returns unique identifier of gains */ 197 const opus_int8 ind[ MAX_NB_SUBFR ], /* I gain indices */ 198 const opus_int nb_subfr /* I number of subframes */ 199 ); 200 201 /* Interpolate two vectors */ 202 void silk_interpolate( 203 opus_int16 xi[ MAX_LPC_ORDER ], /* O interpolated vector */ 204 const opus_int16 x0[ MAX_LPC_ORDER ], /* I first vector */ 205 const opus_int16 x1[ MAX_LPC_ORDER ], /* I second vector */ 206 const opus_int ifact_Q2, /* I interp. factor, weight on 2nd vector */ 207 const opus_int d /* I number of parameters */ 208 ); 209 210 /* LTP tap quantizer */ 211 void silk_quant_LTP_gains( 212 opus_int16 B_Q14[ MAX_NB_SUBFR * LTP_ORDER ], /* O Quantized LTP gains */ 213 opus_int8 cbk_index[ MAX_NB_SUBFR ], /* O Codebook Index */ 214 opus_int8 *periodicity_index, /* O Periodicity Index */ 215 opus_int32 *sum_gain_dB_Q7, /* I/O Cumulative max prediction gain */ 216 opus_int *pred_gain_dB_Q7, /* O LTP prediction gain */ 217 const opus_int32 XX_Q17[ MAX_NB_SUBFR*LTP_ORDER*LTP_ORDER ], /* I Correlation matrix in Q18 */ 218 const opus_int32 xX_Q17[ MAX_NB_SUBFR*LTP_ORDER ], /* I Correlation vector in Q18 */ 219 const opus_int subfr_len, /* I Number of samples per subframe */ 220 const opus_int nb_subfr, /* I Number of subframes */ 221 int arch /* I Run-time architecture */ 222 ); 223 224 /* Entropy constrained matrix-weighted VQ, for a single input data vector */ 225 void silk_VQ_WMat_EC_c( 226 opus_int8 *ind, /* O index of best codebook vector */ 227 opus_int32 *res_nrg_Q15, /* O best residual energy */ 228 opus_int32 *rate_dist_Q8, /* O best total bitrate */ 229 opus_int *gain_Q7, /* O sum of absolute LTP coefficients */ 230 const opus_int32 *XX_Q17, /* I correlation matrix */ 231 const opus_int32 *xX_Q17, /* I correlation vector */ 232 const opus_int8 *cb_Q7, /* I codebook */ 233 const opus_uint8 *cb_gain_Q7, /* I codebook effective gain */ 234 const opus_uint8 *cl_Q5, /* I code length for each codebook vector */ 235 const opus_int subfr_len, /* I number of samples per subframe */ 236 const opus_int32 max_gain_Q7, /* I maximum sum of absolute LTP coefficients */ 237 const opus_int L /* I number of vectors in codebook */ 238 ); 239 240 #if !defined(OVERRIDE_silk_VQ_WMat_EC) 241 #define silk_VQ_WMat_EC(ind, res_nrg_Q15, rate_dist_Q8, gain_Q7, XX_Q17, xX_Q17, cb_Q7, cb_gain_Q7, cl_Q5, subfr_len, max_gain_Q7, L, arch) \ 242 ((void)(arch),silk_VQ_WMat_EC_c(ind, res_nrg_Q15, rate_dist_Q8, gain_Q7, XX_Q17, xX_Q17, cb_Q7, cb_gain_Q7, cl_Q5, subfr_len, max_gain_Q7, L)) 243 #endif 244 245 /************************************/ 246 /* Noise shaping quantization (NSQ) */ 247 /************************************/ 248 249 void silk_NSQ_c( 250 const silk_encoder_state *psEncC, /* I Encoder State */ 251 silk_nsq_state *NSQ, /* I/O NSQ state */ 252 SideInfoIndices *psIndices, /* I/O Quantization Indices */ 253 const opus_int16 x16[], /* I Input */ 254 opus_int8 pulses[], /* O Quantized pulse signal */ 255 const opus_int16 PredCoef_Q12[ 2 * MAX_LPC_ORDER ], /* I Short term prediction coefs */ 256 const opus_int16 LTPCoef_Q14[ LTP_ORDER * MAX_NB_SUBFR ], /* I Long term prediction coefs */ 257 const opus_int16 AR_Q13[ MAX_NB_SUBFR * MAX_SHAPE_LPC_ORDER ], /* I Noise shaping coefs */ 258 const opus_int HarmShapeGain_Q14[ MAX_NB_SUBFR ], /* I Long term shaping coefs */ 259 const opus_int Tilt_Q14[ MAX_NB_SUBFR ], /* I Spectral tilt */ 260 const opus_int32 LF_shp_Q14[ MAX_NB_SUBFR ], /* I Low frequency shaping coefs */ 261 const opus_int32 Gains_Q16[ MAX_NB_SUBFR ], /* I Quantization step sizes */ 262 const opus_int pitchL[ MAX_NB_SUBFR ], /* I Pitch lags */ 263 const opus_int Lambda_Q10, /* I Rate/distortion tradeoff */ 264 const opus_int LTP_scale_Q14 /* I LTP state scaling */ 265 ); 266 267 #if !defined(OVERRIDE_silk_NSQ) 268 #define silk_NSQ(psEncC, NSQ, psIndices, x16, pulses, PredCoef_Q12, LTPCoef_Q14, AR_Q13, \ 269 HarmShapeGain_Q14, Tilt_Q14, LF_shp_Q14, Gains_Q16, pitchL, Lambda_Q10, LTP_scale_Q14, arch) \ 270 ((void)(arch),silk_NSQ_c(psEncC, NSQ, psIndices, x16, pulses, PredCoef_Q12, LTPCoef_Q14, AR_Q13, \ 271 HarmShapeGain_Q14, Tilt_Q14, LF_shp_Q14, Gains_Q16, pitchL, Lambda_Q10, LTP_scale_Q14)) 272 #endif 273 274 /* Noise shaping using delayed decision */ 275 void silk_NSQ_del_dec_c( 276 const silk_encoder_state *psEncC, /* I Encoder State */ 277 silk_nsq_state *NSQ, /* I/O NSQ state */ 278 SideInfoIndices *psIndices, /* I/O Quantization Indices */ 279 const opus_int16 x16[], /* I Input */ 280 opus_int8 pulses[], /* O Quantized pulse signal */ 281 const opus_int16 PredCoef_Q12[ 2 * MAX_LPC_ORDER ], /* I Short term prediction coefs */ 282 const opus_int16 LTPCoef_Q14[ LTP_ORDER * MAX_NB_SUBFR ], /* I Long term prediction coefs */ 283 const opus_int16 AR_Q13[ MAX_NB_SUBFR * MAX_SHAPE_LPC_ORDER ], /* I Noise shaping coefs */ 284 const opus_int HarmShapeGain_Q14[ MAX_NB_SUBFR ], /* I Long term shaping coefs */ 285 const opus_int Tilt_Q14[ MAX_NB_SUBFR ], /* I Spectral tilt */ 286 const opus_int32 LF_shp_Q14[ MAX_NB_SUBFR ], /* I Low frequency shaping coefs */ 287 const opus_int32 Gains_Q16[ MAX_NB_SUBFR ], /* I Quantization step sizes */ 288 const opus_int pitchL[ MAX_NB_SUBFR ], /* I Pitch lags */ 289 const opus_int Lambda_Q10, /* I Rate/distortion tradeoff */ 290 const opus_int LTP_scale_Q14 /* I LTP state scaling */ 291 ); 292 293 #if !defined(OVERRIDE_silk_NSQ_del_dec) 294 #define silk_NSQ_del_dec(psEncC, NSQ, psIndices, x16, pulses, PredCoef_Q12, LTPCoef_Q14, AR_Q13, \ 295 HarmShapeGain_Q14, Tilt_Q14, LF_shp_Q14, Gains_Q16, pitchL, Lambda_Q10, LTP_scale_Q14, arch) \ 296 ((void)(arch),silk_NSQ_del_dec_c(psEncC, NSQ, psIndices, x16, pulses, PredCoef_Q12, LTPCoef_Q14, AR_Q13, \ 297 HarmShapeGain_Q14, Tilt_Q14, LF_shp_Q14, Gains_Q16, pitchL, Lambda_Q10, LTP_scale_Q14)) 298 #endif 299 300 /************/ 301 /* Silk VAD */ 302 /************/ 303 /* Initialize the Silk VAD */ 304 opus_int silk_VAD_Init( /* O Return value, 0 if success */ 305 silk_VAD_state *psSilk_VAD /* I/O Pointer to Silk VAD state */ 306 ); 307 308 /* Get speech activity level in Q8 */ 309 opus_int silk_VAD_GetSA_Q8_c( /* O Return value, 0 if success */ 310 silk_encoder_state *psEncC, /* I/O Encoder state */ 311 const opus_int16 pIn[] /* I PCM input */ 312 ); 313 314 #if !defined(OVERRIDE_silk_VAD_GetSA_Q8) 315 #define silk_VAD_GetSA_Q8(psEnC, pIn, arch) ((void)(arch),silk_VAD_GetSA_Q8_c(psEnC, pIn)) 316 #endif 317 318 /* Low-pass filter with variable cutoff frequency based on */ 319 /* piece-wise linear interpolation between elliptic filters */ 320 /* Start by setting transition_frame_no = 1; */ 321 void silk_LP_variable_cutoff( 322 silk_LP_state *psLP, /* I/O LP filter state */ 323 opus_int16 *frame, /* I/O Low-pass filtered output signal */ 324 const opus_int frame_length /* I Frame length */ 325 ); 326 327 /******************/ 328 /* NLSF Quantizer */ 329 /******************/ 330 /* Limit, stabilize, convert and quantize NLSFs */ 331 void silk_process_NLSFs( 332 silk_encoder_state *psEncC, /* I/O Encoder state */ 333 opus_int16 PredCoef_Q12[ 2 ][ MAX_LPC_ORDER ], /* O Prediction coefficients */ 334 opus_int16 pNLSF_Q15[ MAX_LPC_ORDER ], /* I/O Normalized LSFs (quant out) (0 - (2^15-1)) */ 335 const opus_int16 prev_NLSFq_Q15[ MAX_LPC_ORDER ] /* I Previous Normalized LSFs (0 - (2^15-1)) */ 336 ); 337 338 opus_int32 silk_NLSF_encode( /* O Returns RD value in Q25 */ 339 opus_int8 *NLSFIndices, /* I Codebook path vector [ LPC_ORDER + 1 ] */ 340 opus_int16 *pNLSF_Q15, /* I/O Quantized NLSF vector [ LPC_ORDER ] */ 341 const silk_NLSF_CB_struct *psNLSF_CB, /* I Codebook object */ 342 const opus_int16 *pW_QW, /* I NLSF weight vector [ LPC_ORDER ] */ 343 const opus_int NLSF_mu_Q20, /* I Rate weight for the RD optimization */ 344 const opus_int nSurvivors, /* I Max survivors after first stage */ 345 const opus_int signalType /* I Signal type: 0/1/2 */ 346 ); 347 348 /* Compute quantization errors for an LPC_order element input vector for a VQ codebook */ 349 void silk_NLSF_VQ( 350 opus_int32 err_Q26[], /* O Quantization errors [K] */ 351 const opus_int16 in_Q15[], /* I Input vectors to be quantized [LPC_order] */ 352 const opus_uint8 pCB_Q8[], /* I Codebook vectors [K*LPC_order] */ 353 const opus_int16 pWght_Q9[], /* I Codebook weights [K*LPC_order] */ 354 const opus_int K, /* I Number of codebook vectors */ 355 const opus_int LPC_order /* I Number of LPCs */ 356 ); 357 358 /* Delayed-decision quantizer for NLSF residuals */ 359 opus_int32 silk_NLSF_del_dec_quant( /* O Returns RD value in Q25 */ 360 opus_int8 indices[], /* O Quantization indices [ order ] */ 361 const opus_int16 x_Q10[], /* I Input [ order ] */ 362 const opus_int16 w_Q5[], /* I Weights [ order ] */ 363 const opus_uint8 pred_coef_Q8[], /* I Backward predictor coefs [ order ] */ 364 const opus_int16 ec_ix[], /* I Indices to entropy coding tables [ order ] */ 365 const opus_uint8 ec_rates_Q5[], /* I Rates [] */ 366 const opus_int quant_step_size_Q16, /* I Quantization step size */ 367 const opus_int16 inv_quant_step_size_Q6, /* I Inverse quantization step size */ 368 const opus_int32 mu_Q20, /* I R/D tradeoff */ 369 const opus_int16 order /* I Number of input values */ 370 ); 371 372 /* Unpack predictor values and indices for entropy coding tables */ 373 void silk_NLSF_unpack( 374 opus_int16 ec_ix[], /* O Indices to entropy tables [ LPC_ORDER ] */ 375 opus_uint8 pred_Q8[], /* O LSF predictor [ LPC_ORDER ] */ 376 const silk_NLSF_CB_struct *psNLSF_CB, /* I Codebook object */ 377 const opus_int CB1_index /* I Index of vector in first LSF codebook */ 378 ); 379 380 /***********************/ 381 /* NLSF vector decoder */ 382 /***********************/ 383 void silk_NLSF_decode( 384 opus_int16 *pNLSF_Q15, /* O Quantized NLSF vector [ LPC_ORDER ] */ 385 opus_int8 *NLSFIndices, /* I Codebook path vector [ LPC_ORDER + 1 ] */ 386 const silk_NLSF_CB_struct *psNLSF_CB /* I Codebook object */ 387 ); 388 389 /****************************************************/ 390 /* Decoder Functions */ 391 /****************************************************/ 392 opus_int silk_init_decoder( 393 silk_decoder_state *psDec /* I/O Decoder state pointer */ 394 ); 395 396 /* Set decoder sampling rate */ 397 opus_int silk_decoder_set_fs( 398 silk_decoder_state *psDec, /* I/O Decoder state pointer */ 399 opus_int fs_kHz, /* I Sampling frequency (kHz) */ 400 opus_int32 fs_API_Hz /* I API Sampling frequency (Hz) */ 401 ); 402 403 /****************/ 404 /* Decode frame */ 405 /****************/ 406 opus_int silk_decode_frame( 407 silk_decoder_state *psDec, /* I/O Pointer to Silk decoder state */ 408 ec_dec *psRangeDec, /* I/O Compressor data structure */ 409 opus_int16 pOut[], /* O Pointer to output speech frame */ 410 opus_int32 *pN, /* O Pointer to size of output frame */ 411 opus_int lostFlag, /* I 0: no loss, 1 loss, 2 decode fec */ 412 opus_int condCoding, /* I The type of conditional coding to use */ 413 int arch /* I Run-time architecture */ 414 ); 415 416 /* Decode indices from bitstream */ 417 void silk_decode_indices( 418 silk_decoder_state *psDec, /* I/O State */ 419 ec_dec *psRangeDec, /* I/O Compressor data structure */ 420 opus_int FrameIndex, /* I Frame number */ 421 opus_int decode_LBRR, /* I Flag indicating LBRR data is being decoded */ 422 opus_int condCoding /* I The type of conditional coding to use */ 423 ); 424 425 /* Decode parameters from payload */ 426 void silk_decode_parameters( 427 silk_decoder_state *psDec, /* I/O State */ 428 silk_decoder_control *psDecCtrl, /* I/O Decoder control */ 429 opus_int condCoding /* I The type of conditional coding to use */ 430 ); 431 432 /* Core decoder. Performs inverse NSQ operation LTP + LPC */ 433 void silk_decode_core( 434 silk_decoder_state *psDec, /* I/O Decoder state */ 435 silk_decoder_control *psDecCtrl, /* I Decoder control */ 436 opus_int16 xq[], /* O Decoded speech */ 437 const opus_int16 pulses[ MAX_FRAME_LENGTH ], /* I Pulse signal */ 438 int arch /* I Run-time architecture */ 439 ); 440 441 /* Decode quantization indices of excitation (Shell coding) */ 442 void silk_decode_pulses( 443 ec_dec *psRangeDec, /* I/O Compressor data structure */ 444 opus_int16 pulses[], /* O Excitation signal */ 445 const opus_int signalType, /* I Sigtype */ 446 const opus_int quantOffsetType, /* I quantOffsetType */ 447 const opus_int frame_length /* I Frame length */ 448 ); 449 450 /******************/ 451 /* CNG */ 452 /******************/ 453 454 /* Reset CNG */ 455 void silk_CNG_Reset( 456 silk_decoder_state *psDec /* I/O Decoder state */ 457 ); 458 459 /* Updates CNG estimate, and applies the CNG when packet was lost */ 460 void silk_CNG( 461 silk_decoder_state *psDec, /* I/O Decoder state */ 462 silk_decoder_control *psDecCtrl, /* I/O Decoder control */ 463 opus_int16 frame[], /* I/O Signal */ 464 opus_int length /* I Length of residual */ 465 ); 466 467 /* Encoding of various parameters */ 468 void silk_encode_indices( 469 silk_encoder_state *psEncC, /* I/O Encoder state */ 470 ec_enc *psRangeEnc, /* I/O Compressor data structure */ 471 opus_int FrameIndex, /* I Frame number */ 472 opus_int encode_LBRR, /* I Flag indicating LBRR data is being encoded */ 473 opus_int condCoding /* I The type of conditional coding to use */ 474 ); 475 476 #endif 477
