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| 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 /* Convert Left/Right stereo signal to adaptive Mid/Side representation */ |
| 42 void silk_stereo_LR_to_MS( |
| 43 stereo_enc_state *state, /* I/O State
*/ |
| 44 opus_int16 x1[], /* I/O Left inp
ut signal, becomes mid signal */ |
| 45 opus_int16 x2[], /* I/O Right in
put signal, becomes side signal */ |
| 46 opus_int8 ix[ 2 ][ 3 ], /* O Quantiza
tion indices */ |
| 47 opus_int8 *mid_only_flag, /* O Flag: on
ly mid signal coded */ |
| 48 opus_int32 mid_side_rates_bps[], /* O Bitrates
for mid and side signals */ |
| 49 opus_int32 total_rate_bps, /* I Total bi
trate */ |
| 50 opus_int prev_speech_act_Q8, /* I Speech a
ctivity level in previous frame */ |
| 51 opus_int toMono, /* I Last fra
me before a stereo->mono transition */ |
| 52 opus_int fs_kHz, /* I Sample r
ate (kHz) */ |
| 53 opus_int frame_length /* I Number o
f samples */ |
| 54 ); |
| 55 |
| 56 /* Convert adaptive Mid/Side representation to Left/Right stereo signal */ |
| 57 void silk_stereo_MS_to_LR( |
| 58 stereo_dec_state *state, /* I/O State
*/ |
| 59 opus_int16 x1[], /* I/O Left inp
ut signal, becomes mid signal */ |
| 60 opus_int16 x2[], /* I/O Right in
put signal, becomes side signal */ |
| 61 const opus_int32 pred_Q13[], /* I Predicto
rs */ |
| 62 opus_int fs_kHz, /* I Samples
rate (kHz) */ |
| 63 opus_int frame_length /* I Number o
f samples */ |
| 64 ); |
| 65 |
| 66 /* Find least-squares prediction gain for one signal based on another and quanti
ze it */ |
| 67 opus_int32 silk_stereo_find_predictor( /* O Returns
predictor in Q13 */ |
| 68 opus_int32 *ratio_Q14, /* O Ratio of
residual and mid energies */ |
| 69 const opus_int16 x[], /* I Basis si
gnal */ |
| 70 const opus_int16 y[], /* I Target s
ignal */ |
| 71 opus_int32 mid_res_amp_Q0[], /* I/O Smoothed
mid, residual norms */ |
| 72 opus_int length, /* I Number o
f samples */ |
| 73 opus_int smooth_coef_Q16 /* I Smoothin
g coefficient */ |
| 74 ); |
| 75 |
| 76 /* Quantize mid/side predictors */ |
| 77 void silk_stereo_quant_pred( |
| 78 opus_int32 pred_Q13[], /* I/O Predicto
rs (out: quantized) */ |
| 79 opus_int8 ix[ 2 ][ 3 ] /* O Quantiza
tion indices */ |
| 80 ); |
| 81 |
| 82 /* Entropy code the mid/side quantization indices */ |
| 83 void silk_stereo_encode_pred( |
| 84 ec_enc *psRangeEnc, /* I/O Compress
or data structure */ |
| 85 opus_int8 ix[ 2 ][ 3 ] /* I Quantiza
tion indices */ |
| 86 ); |
| 87 |
| 88 /* Entropy code the mid-only flag */ |
| 89 void silk_stereo_encode_mid_only( |
| 90 ec_enc *psRangeEnc, /* I/O Compress
or data structure */ |
| 91 opus_int8 mid_only_flag |
| 92 ); |
| 93 |
| 94 /* Decode mid/side predictors */ |
| 95 void silk_stereo_decode_pred( |
| 96 ec_dec *psRangeDec, /* I/O Compress
or data structure */ |
| 97 opus_int32 pred_Q13[] /* O Predicto
rs */ |
| 98 ); |
| 99 |
| 100 /* Decode mid-only flag */ |
| 101 void silk_stereo_decode_mid_only( |
| 102 ec_dec *psRangeDec, /* I/O Compress
or data structure */ |
| 103 opus_int *decode_only_mid /* O Flag tha
t only mid channel has been coded */ |
| 104 ); |
| 105 |
| 106 /* Encodes signs of excitation */ |
| 107 void silk_encode_signs( |
| 108 ec_enc *psRangeEnc, /* I/O Comp
ressor data structure */ |
| 109 const opus_int8 pulses[], /* I puls
e signal */ |
| 110 opus_int length, /* I leng
th of input */ |
| 111 const opus_int signalType, /* I Sign
al type */ |
| 112 const opus_int quantOffsetType, /* I Quan
tization offset type */ |
| 113 const opus_int sum_pulses[ MAX_NB_SHELL_BLOCKS ] /* I Sum
of absolute pulses per block */ |
| 114 ); |
| 115 |
| 116 /* Decodes signs of excitation */ |
| 117 void silk_decode_signs( |
| 118 ec_dec *psRangeDec, /* I/O Comp
ressor data structure */ |
| 119 opus_int pulses[], /* I/O puls
e signal */ |
| 120 opus_int length, /* I leng
th of input */ |
| 121 const opus_int signalType, /* I Sign
al type */ |
| 122 const opus_int quantOffsetType, /* I Quan
tization offset type */ |
| 123 const opus_int sum_pulses[ MAX_NB_SHELL_BLOCKS ] /* I Sum
of absolute pulses per block */ |
| 124 ); |
| 125 |
| 126 /* Check encoder control struct */ |
| 127 opus_int check_control_input( |
| 128 silk_EncControlStruct *encControl /* I Control
structure */ |
| 129 ); |
| 130 |
| 131 /* Control internal sampling rate */ |
| 132 opus_int silk_control_audio_bandwidth( |
| 133 silk_encoder_state *psEncC, /* I/O Pointer
to Silk encoder state */ |
| 134 silk_EncControlStruct *encControl /* I Control
structure */ |
| 135 ); |
| 136 |
| 137 /* Control SNR of redidual quantizer */ |
| 138 opus_int silk_control_SNR( |
| 139 silk_encoder_state *psEncC, /* I/O Pointer
to Silk encoder state */ |
| 140 opus_int32 TargetRate_bps /* I Target m
ax bitrate (bps) */ |
| 141 ); |
| 142 |
| 143 /***************/ |
| 144 /* Shell coder */ |
| 145 /***************/ |
| 146 |
| 147 /* Encode quantization indices of excitation */ |
| 148 void silk_encode_pulses( |
| 149 ec_enc *psRangeEnc, /* I/O compress
or data structure */ |
| 150 const opus_int signalType, /* I Signal t
ype */ |
| 151 const opus_int quantOffsetType, /* I quantOff
setType */ |
| 152 opus_int8 pulses[], /* I quantiza
tion indices */ |
| 153 const opus_int frame_length /* I Frame le
ngth */ |
| 154 ); |
| 155 |
| 156 /* Shell encoder, operates on one shell code frame of 16 pulses */ |
| 157 void silk_shell_encoder( |
| 158 ec_enc *psRangeEnc, /* I/O compress
or data structure */ |
| 159 const opus_int *pulses0 /* I data: no
nnegative pulse amplitudes */ |
| 160 ); |
| 161 |
| 162 /* Shell decoder, operates on one shell code frame of 16 pulses */ |
| 163 void silk_shell_decoder( |
| 164 opus_int *pulses0, /* O data: no
nnegative pulse amplitudes */ |
| 165 ec_dec *psRangeDec, /* I/O Compress
or data structure */ |
| 166 const opus_int pulses4 /* I number o
f pulses per pulse-subframe */ |
| 167 ); |
| 168 |
| 169 /* Gain scalar quantization with hysteresis, uniform on log scale */ |
| 170 void silk_gains_quant( |
| 171 opus_int8 ind[ MAX_NB_SUBFR ], /* O gain ind
ices */ |
| 172 opus_int32 gain_Q16[ MAX_NB_SUBFR ], /* I/O gains (q
uantized out) */ |
| 173 opus_int8 *prev_ind, /* I/O last ind
ex in previous frame */ |
| 174 const opus_int conditional, /* I first ga
in is delta coded if 1 */ |
| 175 const opus_int nb_subfr /* I number o
f subframes */ |
| 176 ); |
| 177 |
| 178 /* Gains scalar dequantization, uniform on log scale */ |
| 179 void silk_gains_dequant( |
| 180 opus_int32 gain_Q16[ MAX_NB_SUBFR ], /* O quantize
d gains */ |
| 181 const opus_int8 ind[ MAX_NB_SUBFR ], /* I gain ind
ices */ |
| 182 opus_int8 *prev_ind, /* I/O last ind
ex in previous frame */ |
| 183 const opus_int conditional, /* I first ga
in is delta coded if 1 */ |
| 184 const opus_int nb_subfr /* I number o
f subframes */ |
| 185 ); |
| 186 |
| 187 /* Compute unique identifier of gain indices vector */ |
| 188 opus_int32 silk_gains_ID( /* O returns
unique identifier of gains */ |
| 189 const opus_int8 ind[ MAX_NB_SUBFR ], /* I gain ind
ices */ |
| 190 const opus_int nb_subfr /* I number o
f subframes */ |
| 191 ); |
| 192 |
| 193 /* Interpolate two vectors */ |
| 194 void silk_interpolate( |
| 195 opus_int16 xi[ MAX_LPC_ORDER ], /* O interpol
ated vector */ |
| 196 const opus_int16 x0[ MAX_LPC_ORDER ], /* I first ve
ctor */ |
| 197 const opus_int16 x1[ MAX_LPC_ORDER ], /* I second v
ector */ |
| 198 const opus_int ifact_Q2, /* I interp.
factor, weight on 2nd vector */ |
| 199 const opus_int d /* I number o
f parameters */ |
| 200 ); |
| 201 |
| 202 /* LTP tap quantizer */ |
| 203 void silk_quant_LTP_gains( |
| 204 opus_int16 B_Q14[ MAX_NB_SUBFR * LTP_ORDER ], /* I
/O (un)quantized LTP gains */ |
| 205 opus_int8 cbk_index[ MAX_NB_SUBFR ], /* O
Codebook Index */ |
| 206 opus_int8 *periodicity_index, /* O
Periodicity Index */ |
| 207 const opus_int32 W_Q18[ MAX_NB_SUBFR*LTP_ORDER*LTP_ORDER ], /* I
Error Weights in Q18 */ |
| 208 opus_int mu_Q9, /* I
Mu value (R/D tradeoff) */ |
| 209 opus_int lowComplexity, /* I
Flag for low complexity */ |
| 210 const opus_int nb_subfr /* I
number of subframes */ |
| 211 ); |
| 212 |
| 213 /* Entropy constrained matrix-weighted VQ, for a single input data vector */ |
| 214 void silk_VQ_WMat_EC( |
| 215 opus_int8 *ind, /* O index of
best codebook vector */ |
| 216 opus_int32 *rate_dist_Q14, /* O best wei
ghted quant error + mu * rate */ |
| 217 const opus_int16 *in_Q14, /* I input ve
ctor to be quantized */ |
| 218 const opus_int32 *W_Q18, /* I weightin
g matrix */ |
| 219 const opus_int8 *cb_Q7, /* I codebook
*/ |
| 220 const opus_uint8 *cl_Q5, /* I code len
gth for each codebook vector */ |
| 221 const opus_int mu_Q9, /* I tradeoff
betw. weighted error and rate */ |
| 222 opus_int L /* I number o
f vectors in codebook */ |
| 223 ); |
| 224 |
| 225 /************************************/ |
| 226 /* Noise shaping quantization (NSQ) */ |
| 227 /************************************/ |
| 228 void silk_NSQ( |
| 229 const silk_encoder_state *psEncC, /* I
/O Encoder State */ |
| 230 silk_nsq_state *NSQ, /* I
/O NSQ state */ |
| 231 SideInfoIndices *psIndices, /* I
/O Quantization Indices */ |
| 232 const opus_int32 x_Q3[], /* I
Prefiltered input signal */ |
| 233 opus_int8 pulses[], /* O
Quantized pulse signal */ |
| 234 const opus_int16 PredCoef_Q12[ 2 * MAX_LPC_ORDER ], /* I
Short term prediction coefs */ |
| 235 const opus_int16 LTPCoef_Q14[ LTP_ORDER * MAX_NB_SUBFR ], /* I
Long term prediction coefs */ |
| 236 const opus_int16 AR2_Q13[ MAX_NB_SUBFR * MAX_SHAPE_LPC_ORDER ], /
* I Noise shaping coefs */ |
| 237 const opus_int HarmShapeGain_Q14[ MAX_NB_SUBFR ], /* I
Long term shaping coefs */ |
| 238 const opus_int Tilt_Q14[ MAX_NB_SUBFR ], /* I
Spectral tilt */ |
| 239 const opus_int32 LF_shp_Q14[ MAX_NB_SUBFR ], /* I
Low frequency shaping coefs */ |
| 240 const opus_int32 Gains_Q16[ MAX_NB_SUBFR ], /* I
Quantization step sizes */ |
| 241 const opus_int pitchL[ MAX_NB_SUBFR ], /* I
Pitch lags */ |
| 242 const opus_int Lambda_Q10, /* I
Rate/distortion tradeoff */ |
| 243 const opus_int LTP_scale_Q14 /* I
LTP state scaling */ |
| 244 ); |
| 245 |
| 246 /* Noise shaping using delayed decision */ |
| 247 void silk_NSQ_del_dec( |
| 248 const silk_encoder_state *psEncC, /* I
/O Encoder State */ |
| 249 silk_nsq_state *NSQ, /* I
/O NSQ state */ |
| 250 SideInfoIndices *psIndices, /* I
/O Quantization Indices */ |
| 251 const opus_int32 x_Q3[], /* I
Prefiltered input signal */ |
| 252 opus_int8 pulses[], /* O
Quantized pulse signal */ |
| 253 const opus_int16 PredCoef_Q12[ 2 * MAX_LPC_ORDER ], /* I
Short term prediction coefs */ |
| 254 const opus_int16 LTPCoef_Q14[ LTP_ORDER * MAX_NB_SUBFR ], /* I
Long term prediction coefs */ |
| 255 const opus_int16 AR2_Q13[ MAX_NB_SUBFR * MAX_SHAPE_LPC_ORDER ], /
* I Noise shaping coefs */ |
| 256 const opus_int HarmShapeGain_Q14[ MAX_NB_SUBFR ], /* I
Long term shaping coefs */ |
| 257 const opus_int Tilt_Q14[ MAX_NB_SUBFR ], /* I
Spectral tilt */ |
| 258 const opus_int32 LF_shp_Q14[ MAX_NB_SUBFR ], /* I
Low frequency shaping coefs */ |
| 259 const opus_int32 Gains_Q16[ MAX_NB_SUBFR ], /* I
Quantization step sizes */ |
| 260 const opus_int pitchL[ MAX_NB_SUBFR ], /* I
Pitch lags */ |
| 261 const opus_int Lambda_Q10, /* I
Rate/distortion tradeoff */ |
| 262 const opus_int LTP_scale_Q14 /* I
LTP state scaling */ |
| 263 ); |
| 264 |
| 265 /************/ |
| 266 /* Silk VAD */ |
| 267 /************/ |
| 268 /* Initialize the Silk VAD */ |
| 269 opus_int silk_VAD_Init( /* O Return v
alue, 0 if success */ |
| 270 silk_VAD_state *psSilk_VAD /* I/O Pointer
to Silk VAD state */ |
| 271 ); |
| 272 |
| 273 /* Get speech activity level in Q8 */ |
| 274 opus_int silk_VAD_GetSA_Q8( /* O Return v
alue, 0 if success */ |
| 275 silk_encoder_state *psEncC, /* I/O Encoder
state */ |
| 276 const opus_int16 pIn[] /* I PCM inpu
t */ |
| 277 ); |
| 278 |
| 279 /* Low-pass filter with variable cutoff frequency based on */ |
| 280 /* piece-wise linear interpolation between elliptic filters */ |
| 281 /* Start by setting transition_frame_no = 1; */ |
| 282 void silk_LP_variable_cutoff( |
| 283 silk_LP_state *psLP, /* I/O LP filte
r state */ |
| 284 opus_int16 *frame, /* I/O Low-pass
filtered output signal */ |
| 285 const opus_int frame_length /* I Frame le
ngth */ |
| 286 ); |
| 287 |
| 288 /******************/ |
| 289 /* NLSF Quantizer */ |
| 290 /******************/ |
| 291 /* Limit, stabilize, convert and quantize NLSFs */ |
| 292 void silk_process_NLSFs( |
| 293 silk_encoder_state *psEncC, /* I/O Enco
der state */ |
| 294 opus_int16 PredCoef_Q12[ 2 ][ MAX_LPC_ORDER ], /* O Pred
iction coefficients */ |
| 295 opus_int16 pNLSF_Q15[ MAX_LPC_ORDER ], /* I/O Norm
alized LSFs (quant out) (0 - (2^15-1)) */ |
| 296 const opus_int16 prev_NLSFq_Q15[ MAX_LPC_ORDER ] /* I Prev
ious Normalized LSFs (0 - (2^15-1)) */ |
| 297 ); |
| 298 |
| 299 opus_int32 silk_NLSF_encode( /* O Returns
RD value in Q25 */ |
| 300 opus_int8 *NLSFIndices, /* I Codebook
path vector [ LPC_ORDER + 1 ] */ |
| 301 opus_int16 *pNLSF_Q15, /* I/O Quantize
d NLSF vector [ LPC_ORDER ] */ |
| 302 const silk_NLSF_CB_struct *psNLSF_CB, /* I Codebook
object */ |
| 303 const opus_int16 *pW_QW, /* I NLSF wei
ght vector [ LPC_ORDER ] */ |
| 304 const opus_int NLSF_mu_Q20, /* I Rate wei
ght for the RD optimization */ |
| 305 const opus_int nSurvivors, /* I Max surv
ivors after first stage */ |
| 306 const opus_int signalType /* I Signal t
ype: 0/1/2 */ |
| 307 ); |
| 308 |
| 309 /* Compute quantization errors for an LPC_order element input vector for a VQ co
debook */ |
| 310 void silk_NLSF_VQ( |
| 311 opus_int32 err_Q26[], /* O Quantiza
tion errors [K] */ |
| 312 const opus_int16 in_Q15[], /* I Input ve
ctors to be quantized [LPC_order] */ |
| 313 const opus_uint8 pCB_Q8[], /* I Codebook
vectors [K*LPC_order] */ |
| 314 const opus_int K, /* I Number o
f codebook vectors */ |
| 315 const opus_int LPC_order /* I Number o
f LPCs */ |
| 316 ); |
| 317 |
| 318 /* Delayed-decision quantizer for NLSF residuals */ |
| 319 opus_int32 silk_NLSF_del_dec_quant( /* O Returns
RD value in Q25 */ |
| 320 opus_int8 indices[], /* O Quantiza
tion indices [ order ] */ |
| 321 const opus_int16 x_Q10[], /* I Input [
order ] */ |
| 322 const opus_int16 w_Q5[], /* I Weights
[ order ] */ |
| 323 const opus_uint8 pred_coef_Q8[], /* I Backward
predictor coefs [ order ] */ |
| 324 const opus_int16 ec_ix[], /* I Indices
to entropy coding tables [ order ] */ |
| 325 const opus_uint8 ec_rates_Q5[], /* I Rates []
*/ |
| 326 const opus_int quant_step_size_Q16, /* I Quantiza
tion step size */ |
| 327 const opus_int16 inv_quant_step_size_Q6, /* I Inverse
quantization step size */ |
| 328 const opus_int32 mu_Q20, /* I R/D trad
eoff */ |
| 329 const opus_int16 order /* I Number o
f input values */ |
| 330 ); |
| 331 |
| 332 /* Unpack predictor values and indices for entropy coding tables */ |
| 333 void silk_NLSF_unpack( |
| 334 opus_int16 ec_ix[], /* O Indices
to entropy tables [ LPC_ORDER ] */ |
| 335 opus_uint8 pred_Q8[], /* O LSF pred
ictor [ LPC_ORDER ] */ |
| 336 const silk_NLSF_CB_struct *psNLSF_CB, /* I Codebook
object */ |
| 337 const opus_int CB1_index /* I Index of
vector in first LSF codebook */ |
| 338 ); |
| 339 |
| 340 /***********************/ |
| 341 /* NLSF vector decoder */ |
| 342 /***********************/ |
| 343 void silk_NLSF_decode( |
| 344 opus_int16 *pNLSF_Q15, /* O Quantize
d NLSF vector [ LPC_ORDER ] */ |
| 345 opus_int8 *NLSFIndices, /* I Codebook
path vector [ LPC_ORDER + 1 ] */ |
| 346 const silk_NLSF_CB_struct *psNLSF_CB /* I Codebook
object */ |
| 347 ); |
| 348 |
| 349 /****************************************************/ |
| 350 /* Decoder Functions */ |
| 351 /****************************************************/ |
| 352 opus_int silk_init_decoder( |
| 353 silk_decoder_state *psDec /* I/O Decoder
state pointer */ |
| 354 ); |
| 355 |
| 356 /* Set decoder sampling rate */ |
| 357 opus_int silk_decoder_set_fs( |
| 358 silk_decoder_state *psDec, /* I/O Decoder
state pointer */ |
| 359 opus_int fs_kHz, /* I Sampling
frequency (kHz) */ |
| 360 opus_int32 fs_API_Hz /* I API Samp
ling frequency (Hz) */ |
| 361 ); |
| 362 |
| 363 /****************/ |
| 364 /* Decode frame */ |
| 365 /****************/ |
| 366 opus_int silk_decode_frame( |
| 367 silk_decoder_state *psDec, /* I/O Pointer
to Silk decoder state */ |
| 368 ec_dec *psRangeDec, /* I/O Compress
or data structure */ |
| 369 opus_int16 pOut[], /* O Pointer
to output speech frame */ |
| 370 opus_int32 *pN, /* O Pointer
to size of output frame */ |
| 371 opus_int lostFlag, /* I 0: no lo
ss, 1 loss, 2 decode fec */ |
| 372 opus_int condCoding /* I The type
of conditional coding to use */ |
| 373 ); |
| 374 |
| 375 /* Decode indices from bitstream */ |
| 376 void silk_decode_indices( |
| 377 silk_decoder_state *psDec, /* I/O State
*/ |
| 378 ec_dec *psRangeDec, /* I/O Compress
or data structure */ |
| 379 opus_int FrameIndex, /* I Frame nu
mber */ |
| 380 opus_int decode_LBRR, /* I Flag ind
icating LBRR data is being decoded */ |
| 381 opus_int condCoding /* I The type
of conditional coding to use */ |
| 382 ); |
| 383 |
| 384 /* Decode parameters from payload */ |
| 385 void silk_decode_parameters( |
| 386 silk_decoder_state *psDec, /* I/O State
*/ |
| 387 silk_decoder_control *psDecCtrl, /* I/O Decoder
control */ |
| 388 opus_int condCoding /* I The type
of conditional coding to use */ |
| 389 ); |
| 390 |
| 391 /* Core decoder. Performs inverse NSQ operation LTP + LPC */ |
| 392 void silk_decode_core( |
| 393 silk_decoder_state *psDec, /* I/O Decoder
state */ |
| 394 silk_decoder_control *psDecCtrl, /* I Decoder
control */ |
| 395 opus_int16 xq[], /* O Decoded
speech */ |
| 396 const opus_int pulses[ MAX_FRAME_LENGTH ] /* I Pulse si
gnal */ |
| 397 ); |
| 398 |
| 399 /* Decode quantization indices of excitation (Shell coding) */ |
| 400 void silk_decode_pulses( |
| 401 ec_dec *psRangeDec, /* I/O Compress
or data structure */ |
| 402 opus_int pulses[], /* O Excitati
on signal */ |
| 403 const opus_int signalType, /* I Sigtype
*/ |
| 404 const opus_int quantOffsetType, /* I quantOff
setType */ |
| 405 const opus_int frame_length /* I Frame le
ngth */ |
| 406 ); |
| 407 |
| 408 /******************/ |
| 409 /* CNG */ |
| 410 /******************/ |
| 411 |
| 412 /* Reset CNG */ |
| 413 void silk_CNG_Reset( |
| 414 silk_decoder_state *psDec /* I/O Decoder
state */ |
| 415 ); |
| 416 |
| 417 /* Updates CNG estimate, and applies the CNG when packet was lost */ |
| 418 void silk_CNG( |
| 419 silk_decoder_state *psDec, /* I/O Decoder
state */ |
| 420 silk_decoder_control *psDecCtrl, /* I/O Decoder
control */ |
| 421 opus_int16 frame[], /* I/O Signal
*/ |
| 422 opus_int length /* I Length o
f residual */ |
| 423 ); |
| 424 |
| 425 /* Encoding of various parameters */ |
| 426 void silk_encode_indices( |
| 427 silk_encoder_state *psEncC, /* I/O Encoder
state */ |
| 428 ec_enc *psRangeEnc, /* I/O Compress
or data structure */ |
| 429 opus_int FrameIndex, /* I Frame nu
mber */ |
| 430 opus_int encode_LBRR, /* I Flag ind
icating LBRR data is being encoded */ |
| 431 opus_int condCoding /* I The type
of conditional coding to use */ |
| 432 ); |
| 433 |
| 434 #endif |
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