Line data Source code
1 : /******************************************************************************************************
2 :
3 : (C) 2022-2025 IVAS codec Public Collaboration with portions copyright Dolby International AB, Ericsson AB,
4 : Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V., Huawei Technologies Co. LTD.,
5 : Koninklijke Philips N.V., Nippon Telegraph and Telephone Corporation, Nokia Technologies Oy, Orange,
6 : Panasonic Holdings Corporation, Qualcomm Technologies, Inc., VoiceAge Corporation, and other
7 : contributors to this repository. All Rights Reserved.
8 :
9 : This software is protected by copyright law and by international treaties.
10 : The IVAS codec Public Collaboration consisting of Dolby International AB, Ericsson AB,
11 : Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V., Huawei Technologies Co. LTD.,
12 : Koninklijke Philips N.V., Nippon Telegraph and Telephone Corporation, Nokia Technologies Oy, Orange,
13 : Panasonic Holdings Corporation, Qualcomm Technologies, Inc., VoiceAge Corporation, and other
14 : contributors to this repository retain full ownership rights in their respective contributions in
15 : the software. This notice grants no license of any kind, including but not limited to patent
16 : license, nor is any license granted by implication, estoppel or otherwise.
17 :
18 : Contributors are required to enter into the IVAS codec Public Collaboration agreement before making
19 : contributions.
20 :
21 : This software is provided "AS IS", without any express or implied warranties. The software is in the
22 : development stage. It is intended exclusively for experts who have experience with such software and
23 : solely for the purpose of inspection. All implied warranties of non-infringement, merchantability
24 : and fitness for a particular purpose are hereby disclaimed and excluded.
25 :
26 : Any dispute, controversy or claim arising under or in relation to providing this software shall be
27 : submitted to and settled by the final, binding jurisdiction of the courts of Munich, Germany in
28 : accordance with the laws of the Federal Republic of Germany excluding its conflict of law rules and
29 : the United Nations Convention on Contracts on the International Sales of Goods.
30 :
31 : *******************************************************************************************************/
32 :
33 : #include <assert.h>
34 : #include <stdint.h>
35 : #include "options.h"
36 : #include <math.h>
37 : #include "ivas_cnst.h"
38 : #include "ivas_prot.h"
39 : #include "prot.h"
40 : #include "wmc_auto.h"
41 :
42 :
43 : /*-------------------------------------------------------------------*
44 : * Local function prototypes
45 : *-------------------------------------------------------------------*/
46 :
47 : static void inverseBwMS( const int16_t startLine, const int16_t stopLine, float x0[], float x1[], const float norm_fac );
48 :
49 :
50 : /*-------------------------------------------------------------------*
51 : * parse_stereo_from_bitstream
52 : *
53 : *
54 : *-------------------------------------------------------------------*/
55 :
56 2770262 : void parse_stereo_from_bitstream(
57 : STEREO_MDCT_DEC_DATA_HANDLE hStereoMdct, /* i/o: MDCT stereo decoder structure */
58 : Decoder_State **sts, /* i/o: decoder state structure */
59 : const int16_t mct_on, /* i : flag mct block (1) or stereo (0)*/
60 : const int16_t isSBAStereoMode, /* i : flag core coding for SBA */
61 : Decoder_State *st0, /* i/o: decoder state structure for Bstr*/
62 : int16_t ms_mask[NB_DIV][MAX_SFB] /* o : bandwise MS mask */
63 : )
64 : {
65 : int16_t i, k, nSubframes, mdct_stereo_mode;
66 : STEREO_MDCT_BAND_PARAMETERS *sfbConf;
67 : #ifdef DEBUGGING
68 : int16_t nbits_start = st0->next_bit_pos;
69 : #endif
70 :
71 2770262 : if ( !isSBAStereoMode )
72 : {
73 2175133 : nSubframes = ( sts[0]->core == TCX_10_CORE || ( sts[0]->core != sts[1]->core ) ) ? NB_DIV : 1;
74 2175133 : sfbConf = ( sts[0]->core == TCX_20_CORE ) ? &hStereoMdct->stbParamsTCX20 : &hStereoMdct->stbParamsTCX10;
75 2175133 : if ( sts[0]->last_core_from_bs == ACELP_CORE )
76 : {
77 6742 : sfbConf = &hStereoMdct->stbParamsTCX20afterACELP;
78 : }
79 :
80 2175133 : if ( hStereoMdct->use_itd )
81 : {
82 : int16_t I;
83 :
84 53517 : hStereoMdct->itd_mode = get_next_indice( st0, STEREO_DFT_ITD_MODE_NBITS );
85 : /*(*nb_bits) += STEREO_DFT_ITD_MODE_NBITS;*/ /*ITD mode flag: 1bit*/
86 :
87 53517 : hStereoMdct->itd = 0.f;
88 53517 : if ( hStereoMdct->itd_mode )
89 : {
90 23898 : /*(*nb_bits) += */ read_itd( st0, &I );
91 23898 : stereo_dft_dequantize_itd( &I, &hStereoMdct->itd, st0->output_Fs );
92 : }
93 : }
94 :
95 4419345 : for ( k = 0; k < nSubframes; k++ )
96 : {
97 2244212 : mdct_stereo_mode = get_next_indice( st0, 1 );
98 2244212 : if ( mdct_stereo_mode )
99 : {
100 2208104 : mdct_stereo_mode = 1 + get_next_indice( st0, 1 );
101 : }
102 2244212 : switch ( mdct_stereo_mode )
103 : {
104 36108 : case 0:
105 36108 : hStereoMdct->mdct_stereo_mode[k] = SMDCT_DUAL_MONO;
106 36108 : break;
107 1330780 : case 1:
108 1330780 : hStereoMdct->mdct_stereo_mode[k] = SMDCT_MS_FULL;
109 1330780 : break;
110 877324 : case 2:
111 877324 : hStereoMdct->mdct_stereo_mode[k] = SMDCT_BW_MS;
112 877324 : break;
113 0 : default:
114 0 : assert( !"Not supported stereo mode\n" );
115 : }
116 :
117 2244212 : if ( !mct_on )
118 : {
119 746796 : if ( sts[0]->core == sts[1]->core || k == 0 )
120 : {
121 743602 : hStereoMdct->global_ild[k] = get_next_indice( st0, SMDCT_GLOBAL_ILD_BITS );
122 1487204 : assert( ( hStereoMdct->global_ild[k] > 0 ) && ( hStereoMdct->global_ild[k] < SMDCT_ILD_RANGE ) );
123 : }
124 : else
125 : {
126 3194 : hStereoMdct->global_ild[1] = hStereoMdct->global_ild[0];
127 : }
128 : }
129 :
130 2244212 : set_s( ms_mask[k], ( hStereoMdct->mdct_stereo_mode[k] == SMDCT_MS_FULL ) ? 1 : 0, sfbConf->nBandsStereoCore );
131 :
132 2244212 : if ( hStereoMdct->mdct_stereo_mode[k] == SMDCT_BW_MS )
133 : {
134 39068233 : for ( i = 0; i < sfbConf->nBandsStereoCore; i++ )
135 : {
136 38190909 : ms_mask[k][i] = get_next_indice( st0, 1 );
137 : }
138 : }
139 :
140 2244212 : if ( st0->igf )
141 : {
142 1147694 : mdct_stereo_mode = get_next_indice( st0, 1 );
143 1147694 : if ( mdct_stereo_mode )
144 : {
145 674663 : mdct_stereo_mode = 1 + get_next_indice( st0, 1 );
146 : }
147 :
148 1147694 : switch ( mdct_stereo_mode )
149 : {
150 473031 : case 0:
151 473031 : hStereoMdct->IGFStereoMode[k] = SMDCT_DUAL_MONO;
152 473031 : break;
153 527200 : case 1:
154 527200 : hStereoMdct->IGFStereoMode[k] = SMDCT_MS_FULL;
155 527200 : break;
156 147463 : case 2:
157 147463 : hStereoMdct->IGFStereoMode[k] = SMDCT_BW_MS;
158 147463 : break;
159 0 : default:
160 0 : assert( !"Not supported stereo mode\n" );
161 : }
162 :
163 1147694 : set_s( &ms_mask[k][sfbConf->nBandsStereoCore], ( hStereoMdct->IGFStereoMode[k] == SMDCT_MS_FULL ) ? 1 : 0, sfbConf->sfbCnt - sfbConf->nBandsStereoCore );
164 :
165 1147694 : if ( hStereoMdct->IGFStereoMode[k] == SMDCT_BW_MS )
166 : {
167 1009097 : for ( i = sfbConf->nBandsStereoCore; i < sfbConf->sfbCnt; i++ )
168 : {
169 861634 : ms_mask[k][i] = get_next_indice( st0, 1 );
170 : }
171 : }
172 : }
173 : else
174 : {
175 1096518 : hStereoMdct->IGFStereoMode[k] = SMDCT_DUAL_MONO;
176 : }
177 : }
178 : }
179 :
180 2770262 : if ( !mct_on )
181 : {
182 1313318 : hStereoMdct->split_ratio = SMDCT_EQUAL_RATIO_RANGE; /* Equal bits to both channels */
183 1313318 : hStereoMdct->split_ratio = get_next_indice( st0, SMDCT_NBBITS_SPLIT_RATIO );
184 :
185 1313318 : assert( hStereoMdct->split_ratio > 0 );
186 : }
187 :
188 : #ifdef DEBUGGING
189 : {
190 : int16_t nBitsStereo = st0->next_bit_pos - nbits_start;
191 :
192 : assert( nBitsStereo <= st0->bits_frame_nominal );
193 : }
194 : #endif
195 :
196 2770262 : return;
197 : }
198 :
199 :
200 : /*-------------------------------------------------------------------*
201 : * stereo_decoder_tcx()
202 : *
203 : * apply stereo processing (inverse MS and global ILD)
204 : *-------------------------------------------------------------------*/
205 :
206 : #define NF_RED_FAC 0.75f
207 :
208 2280782 : void stereo_decoder_tcx(
209 : STEREO_MDCT_DEC_DATA *hStereoMdct, /* i/o: MDCT stereo decoder structure */
210 : int16_t ms_mask[NB_DIV][MAX_SFB], /* i : bandwise MS mask */
211 : float *spec_r_0[NB_DIV], /* i/o: spectrum right channel */
212 : float *spec_l[], /* i/o: spectrum left channel [NB_DIV][N] */
213 : float *spec_r[], /* i/o: spectrum right channel [NB_DIV][N] */
214 : const int16_t mdct_stereo_mode[], /* i : stereo mode (FB/band wise MS, dual mono */
215 : const int16_t core_l, /* i : core for left channel (TCX20/TCX10) */
216 : const int16_t core_r, /* i : core for right channel (TCX20/TCX10) */
217 : const int16_t igf, /* i : flag for IGF activity */
218 : const int16_t L_frameTCX_l, /* i : TCX frame length of left channel */
219 : const int16_t L_frameTCX_r, /* i : TCX frame length of right channel */
220 : const int16_t mct_on, /* i : flag mct block (1) or stereo (0) */
221 : const int16_t last_core_l, /* i : last core for left channel */
222 : const int16_t last_core_r, /* i : last core for right channel */
223 : const int16_t tmp_plc_upmix /* i : indicates temp upmix for PLC decision */
224 : )
225 : {
226 : int16_t i, k, sfb, nSubframes;
227 2280782 : STEREO_MDCT_BAND_PARAMETERS *sfbConf = NULL;
228 : float nrgRatio;
229 :
230 2280782 : nSubframes = 2;
231 2280782 : if ( ( core_l <= TCX_20_CORE && core_r <= TCX_20_CORE ) || tmp_plc_upmix )
232 : {
233 2211179 : nSubframes = 1;
234 : }
235 :
236 4631167 : for ( k = 0; k < nSubframes; k++ )
237 : {
238 2350385 : sfbConf = ( core_l == TCX_20_CORE ) ? &hStereoMdct->stbParamsTCX20 : &hStereoMdct->stbParamsTCX10;
239 :
240 2350385 : if ( last_core_l == ACELP_CORE || last_core_r == ACELP_CORE )
241 : {
242 6834 : sfbConf = &hStereoMdct->stbParamsTCX20afterACELP;
243 : }
244 :
245 2350385 : if ( mdct_stereo_mode[k] == SMDCT_MS_FULL )
246 : {
247 642143007 : for ( i = 0; i < sfbConf->sfbOffset[sfbConf->nBandsStereoCore]; i++ )
248 : {
249 640748414 : if ( spec_r_0[k][i] == 0.0f )
250 : {
251 243005501 : spec_r[k][i] *= NF_RED_FAC;
252 : }
253 : }
254 1394593 : inverseMS( sfbConf->sfbOffset[sfbConf->nBandsStereoCore], spec_l[k], spec_r[k], SQRT2_OVER_2 );
255 : }
256 955792 : else if ( mdct_stereo_mode[k] == SMDCT_BW_MS )
257 : {
258 41038704 : for ( sfb = 0; sfb < sfbConf->nBandsStereoCore; sfb++ )
259 : {
260 40119564 : if ( ms_mask[k][sfb] )
261 : {
262 315431524 : for ( i = sfbConf->sfbOffset[sfb]; i < sfbConf->sfbOffset[sfb + 1]; i++ )
263 : {
264 291385102 : if ( spec_r_0[k][i] == 0.0f )
265 : {
266 76223638 : spec_r[k][i] *= NF_RED_FAC;
267 : }
268 : }
269 24046422 : inverseBwMS( sfbConf->sfbOffset[sfb], sfbConf->sfbOffset[sfb + 1], spec_l[k], spec_r[k], SQRT2_OVER_2 );
270 : }
271 : }
272 : }
273 : #ifdef DEBUGGING
274 : else if ( mdct_stereo_mode[k] != SMDCT_DUAL_MONO )
275 : {
276 : assert( !"Not supported MDCT stereo mode!\n" );
277 : }
278 : #endif
279 :
280 2350385 : if ( igf )
281 : {
282 1192139 : if ( hStereoMdct->IGFStereoMode[k] == SMDCT_MS_FULL )
283 : {
284 167340344 : for ( i = sfbConf->sfbOffset[sfbConf->nBandsStereoCore]; i < sfbConf->sfbOffset[sfbConf->sfbCnt]; i++ )
285 : {
286 166793402 : if ( spec_r_0[k][i] == 0.0f )
287 : {
288 54492454 : spec_r[k][i] *= NF_RED_FAC;
289 : }
290 : }
291 546942 : inverseMS( sfbConf->sfbOffset[sfbConf->sfbCnt] - sfbConf->sfbOffset[sfbConf->nBandsStereoCore], &spec_l[k][sfbConf->sfbOffset[sfbConf->nBandsStereoCore]], &spec_r[k][sfbConf->sfbOffset[sfbConf->nBandsStereoCore]], SQRT2_OVER_2 );
292 : }
293 645197 : else if ( hStereoMdct->IGFStereoMode[k] == SMDCT_BW_MS )
294 : {
295 1031613 : for ( sfb = sfbConf->nBandsStereoCore; sfb < sfbConf->sfbCnt; sfb++ )
296 : {
297 881349 : if ( ms_mask[k][sfb] )
298 : {
299 22501638 : for ( i = sfbConf->sfbOffset[sfb]; i < sfbConf->sfbOffset[sfb + 1]; i++ )
300 : {
301 22032902 : if ( spec_r_0[k][i] == 0.0f )
302 : {
303 6227880 : spec_r[k][i] *= NF_RED_FAC;
304 : }
305 : }
306 468736 : inverseBwMS( sfbConf->sfbOffset[sfb], sfbConf->sfbOffset[sfb + 1], spec_l[k], spec_r[k], SQRT2_OVER_2 );
307 : }
308 : }
309 : }
310 : #ifdef DEBUGGING
311 : else if ( hStereoMdct->IGFStereoMode[k] != SMDCT_DUAL_MONO )
312 : {
313 : assert( !"Not supported MDCT stereo mode!\n" );
314 : }
315 : #endif
316 : }
317 :
318 2350385 : if ( !mct_on )
319 : {
320 852969 : nrgRatio = (float) SMDCT_ILD_RANGE / hStereoMdct->global_ild[k] - 1; /* nrgRatio = nrg[1]/nrg[0] */
321 852969 : hStereoMdct->smooth_ratio = 0.8f * hStereoMdct->smooth_ratio + 0.2f * nrgRatio;
322 : /* set flag to reverse dmx computation in case of right-side panning, only relevant for mono output */
323 852969 : if ( hStereoMdct->smooth_ratio > 1.3f )
324 : {
325 99912 : hStereoMdct->reverse_dmx = 1;
326 : }
327 753057 : else if ( hStereoMdct->smooth_ratio < 0.9f )
328 : {
329 114306 : hStereoMdct->reverse_dmx = 0;
330 : }
331 :
332 852969 : if ( ( nrgRatio > 1.0f ) && ( k < ( ( core_r == TCX_10_CORE ) ? NB_DIV : 1 ) ) )
333 : {
334 281195 : v_multc( spec_r[k], nrgRatio, spec_r[k], L_frameTCX_r );
335 : }
336 571774 : else if ( ( nrgRatio < 1.0f ) && ( k < ( ( core_l == TCX_10_CORE ) ? NB_DIV : 1 ) ) )
337 : {
338 152624 : v_multc( spec_l[k], 1.0f / nrgRatio, spec_l[k], L_frameTCX_l );
339 : }
340 : }
341 : } /* for k */
342 :
343 2280782 : return;
344 : }
345 :
346 :
347 : /*-------------------------------------------------------------------*
348 : * inverseBwMS()
349 : *
350 : * Band-wise M/S stereo processing
351 : *-------------------------------------------------------------------*/
352 :
353 26917129 : static void inverseBwMS(
354 : const int16_t startLine, /* i : start line of sfb */
355 : const int16_t stopLine, /* i : stop line of sfb */
356 : float x0[], /* i/o: mid/left channel coefficients */
357 : float x1[], /* i/o: side/right channel coefficients */
358 : const float norm_fac /* i : normalization factor */
359 : )
360 : {
361 : int16_t j;
362 : float tmpValue;
363 :
364 1155252881 : for ( j = startLine; j < stopLine; j++ )
365 : {
366 1128335752 : tmpValue = x0[j];
367 1128335752 : x0[j] = ( x0[j] + x1[j] ) * norm_fac;
368 1128335752 : x1[j] = ( tmpValue - x1[j] ) * norm_fac;
369 : }
370 :
371 26917129 : return;
372 : }
373 :
374 :
375 : /*-------------------------------------------------------------------*
376 : * inverseMS()
377 : *
378 : * M/S stereo processing
379 : *-------------------------------------------------------------------*/
380 :
381 2401971 : void inverseMS(
382 : const int16_t L_frame, /* i : frame length */
383 : float x0[], /* i/o: mid/left channel coefficients */
384 : float x1[], /* i/o: side/right channel coefficients */
385 : const float norm_fac /* i : normalization factor */
386 : )
387 : {
388 2401971 : inverseBwMS( 0, L_frame, x0, x1, norm_fac );
389 :
390 2401971 : return;
391 : }
392 :
393 :
394 : /*-------------------------------------------------------------------*
395 : * initMdctStereoDecData()
396 : *
397 : * Initialize MDCT stereo decoder configuration
398 : *-------------------------------------------------------------------*/
399 :
400 5289027 : void initMdctStereoDecData(
401 : STEREO_MDCT_DEC_DATA *hStereoMdct, /* i/o: mdct stereo parameters structure */
402 : const int16_t igf, /* i : flag indicating IGF activity */
403 : const H_IGF_GRID igfGrid, /* i : IGF grid configuration */
404 : const int32_t element_brate, /* i : element bitrate */
405 : const int16_t bwidth /* i : audio bandwidth */
406 : )
407 : {
408 : int16_t tcx_coded_lines;
409 :
410 5289027 : tcx_coded_lines = getNumTcxCodedLines( bwidth );
411 :
412 : /*Initialize sfb parameteres for TCX20 */
413 5289027 : stereo_mdct_init_bands( tcx_coded_lines, TCX_20_CORE, element_brate, igf, &igfGrid[IGF_GRID_LB_NORM], &hStereoMdct->stbParamsTCX20.sfbOffset[0], &hStereoMdct->stbParamsTCX20.sfbCnt );
414 :
415 : /*Initialize sfb parameteres for TCX10 */
416 5289027 : stereo_mdct_init_bands( tcx_coded_lines, TCX_10_CORE, element_brate, igf, &igfGrid[IGF_GRID_LB_SHORT], &hStereoMdct->stbParamsTCX10.sfbOffset[0], &hStereoMdct->stbParamsTCX10.sfbCnt );
417 :
418 : /*Initialize sfb parameteres for transition frames */
419 5289027 : stereo_mdct_init_bands( tcx_coded_lines, -1, element_brate, igf, &igfGrid[IGF_GRID_LB_TRAN], &hStereoMdct->stbParamsTCX20afterACELP.sfbOffset[0], &hStereoMdct->stbParamsTCX20afterACELP.sfbCnt );
420 :
421 5289027 : if ( igf )
422 : {
423 : /* calculate the igf start band from the igf start line */
424 2201187 : stereo_mdct_init_igf_start_band( &( hStereoMdct->stbParamsTCX20 ), 1.0f, bwidth, element_brate );
425 2201187 : stereo_mdct_init_igf_start_band( &( hStereoMdct->stbParamsTCX10 ), 0.5f, bwidth, element_brate );
426 2201187 : stereo_mdct_init_igf_start_band( &( hStereoMdct->stbParamsTCX20afterACELP ), 1.25f, bwidth, element_brate );
427 : }
428 : else
429 : {
430 3087840 : hStereoMdct->stbParamsTCX20.sfbIgfStart = -1;
431 3087840 : hStereoMdct->stbParamsTCX10.sfbIgfStart = -1;
432 3087840 : hStereoMdct->stbParamsTCX20afterACELP.sfbIgfStart = -1;
433 3087840 : hStereoMdct->stbParamsTCX10.nBandsStereoCore = hStereoMdct->stbParamsTCX10.sfbCnt;
434 3087840 : hStereoMdct->stbParamsTCX20.nBandsStereoCore = hStereoMdct->stbParamsTCX20.sfbCnt;
435 3087840 : hStereoMdct->stbParamsTCX20afterACELP.nBandsStereoCore = hStereoMdct->stbParamsTCX20afterACELP.sfbCnt;
436 : }
437 :
438 5289027 : return;
439 : }
440 :
441 :
442 : /*-------------------------------------------------------------------*
443 : * initMdctStereoDtxData()
444 : *
445 : * Allocate and initialize structures for MDCT-Stereo DTX operation
446 : *-------------------------------------------------------------------*/
447 :
448 89 : ivas_error initMdctStereoDtxData(
449 : CPE_DEC_HANDLE hCPE /* i/o: CPE handle */
450 : )
451 : {
452 : int16_t ch;
453 : ivas_error error;
454 :
455 89 : error = IVAS_ERR_OK;
456 :
457 267 : for ( ch = 0; ch < CPE_CHANNELS; ch++ )
458 : {
459 178 : DEC_CORE_HANDLE st = hCPE->hCoreCoder[ch];
460 :
461 178 : if ( st->hFdCngDec == NULL )
462 : {
463 : /* Create FD_CNG instance */
464 0 : if ( ( error = createFdCngDec( &st->hFdCngDec ) ) != IVAS_ERR_OK )
465 : {
466 0 : return error;
467 : }
468 :
469 : /* Init FD-CNG */
470 0 : initFdCngDec( st );
471 : }
472 :
473 178 : if ( st->first_CNG == 0 )
474 : {
475 178 : if ( ch == 1 && st->cng_sba_flag )
476 : {
477 49 : st->hFdCngDec->hFdCngCom->seed += 3;
478 : }
479 : }
480 :
481 178 : if ( st->cldfbAna == NULL )
482 : {
483 : /* open analysis for max. sampling rate 48kHz */
484 154 : if ( ( error = openCldfb( &st->cldfbAna, CLDFB_ANALYSIS, 48000, CLDFB_PROTOTYPE_1_25MS ) ) != IVAS_ERR_OK )
485 : {
486 0 : return error;
487 : }
488 : }
489 :
490 178 : if ( st->cldfbBPF == NULL )
491 : {
492 : /* open analysis BPF for max. internal sampling rate 16kHz */
493 154 : if ( ( error = openCldfb( &st->cldfbBPF, CLDFB_ANALYSIS, 16000, CLDFB_PROTOTYPE_1_25MS ) ) != IVAS_ERR_OK )
494 : {
495 0 : return error;
496 : }
497 : }
498 : }
499 :
500 89 : return error;
501 : }
502 :
503 : /*-------------------------------------------------------------------*
504 : * synchonize_channels_mdct_sid()
505 : *
506 : * Synchronize channels in SID frame in MDCT stereo
507 : *-------------------------------------------------------------------*/
508 :
509 16699767 : void synchonize_channels_mdct_sid(
510 : Decoder_State *sts[CPE_CHANNELS], /* i/o: decoder state structure */
511 : const int16_t n /* i : channel number */
512 : )
513 : {
514 : Decoder_State *st;
515 :
516 16699767 : st = sts[n];
517 :
518 16699767 : if ( st->element_mode == IVAS_CPE_MDCT && st->total_brate == SID_2k40 )
519 : {
520 3328 : if ( n == 1 )
521 : {
522 : /* synchronize channels */
523 1664 : sts[1]->L_frame = sts[0]->L_frame;
524 1664 : sts[1]->cng_type = sts[0]->cng_type;
525 1664 : sts[1]->bwidth = sts[0]->bwidth;
526 1664 : sts[0]->hFdCngDec->hFdCngCom->coherence[0] = sts[1]->hFdCngDec->hFdCngCom->coherence[0]; /* coherence is stored in sts[1] - see ivas_decision_matrix_dec() and FdCngDecodeMDCTStereoSID() */
527 1664 : sts[0]->hFdCngDec->hFdCngCom->no_side_flag = sts[1]->hFdCngDec->hFdCngCom->no_side_flag;
528 :
529 : /* configure when there is a switching from DFT CNG to MDCT CNG */
530 1664 : if ( sts[0]->first_CNG == 1 && sts[1]->first_CNG == 0 )
531 : {
532 0 : configureFdCngDec( st->hFdCngDec, st->bwidth, st->element_brate, st->L_frame, st->last_L_frame, st->element_mode );
533 : }
534 : }
535 :
536 3328 : if ( sts[0]->first_CNG == 0 )
537 : {
538 : /* configure CNG after reading first side info from SID to get correct values for L_frame and bwidth if first SID is also first valid frame */
539 178 : configureFdCngDec( st->hFdCngDec, st->bwidth, st->element_brate, st->L_frame, st->last_L_frame, st->element_mode );
540 : }
541 : }
542 :
543 16699767 : return;
544 : }
545 :
546 :
547 : /*-------------------------------------------------------------------*
548 : * updateBuffersForDmxMdctStereo()
549 : *
550 : * synch buffers between channels for mono output and
551 : * apply passive downmix to certain buffers to enable smooth transitions
552 : * between active/inactive coding in MDCT-Stereo DTX
553 : *-------------------------------------------------------------------*/
554 :
555 4095 : void updateBuffersForDmxMdctStereo(
556 : CPE_DEC_HANDLE hCPE, /* i/o: CPE handle */
557 : const int16_t output_frame, /* i : output frame length */
558 : float *output[CPE_CHANNELS], /* i/o: decoder output */
559 : float synth[CPE_CHANNELS][L_FRAME48k] /* i/o: decoder synthesis */
560 : )
561 : {
562 : int16_t delay_buf_out_len, tcxltp_mem_in_len, delta, i;
563 : Decoder_State *sts[CPE_CHANNELS];
564 :
565 4095 : sts[0] = hCPE->hCoreCoder[0];
566 4095 : sts[1] = hCPE->hCoreCoder[1];
567 :
568 : /* synch buffers for inactive frames, but not for transition frames */
569 4095 : if ( hCPE->last_element_brate <= IVAS_SID_5k2 )
570 : {
571 3952 : mvr2r( output[0], output[1], output_frame );
572 3952 : mvr2r( synth[0], synth[1], output_frame );
573 : }
574 :
575 4095 : if ( hCPE->element_brate == IVAS_SID_5k2 && hCPE->last_element_brate > IVAS_SID_5k2 )
576 : {
577 : /* in the first SID frame after an active frame, create mid noise shape here, in SID frames that follow inactive frames, it is done directly in the SID decoding since the mid shape is being used in CNG then */
578 3494 : for ( int16_t p = 0; p < sts[0]->hFdCngDec->hFdCngCom->npart; p++ )
579 : {
580 3351 : sts[0]->hFdCngDec->hFdCngCom->sidNoiseEst[p] = 0.5f * ( sts[0]->hFdCngDec->hFdCngCom->sidNoiseEst[p] + sts[1]->hFdCngDec->hFdCngCom->sidNoiseEst[p] );
581 : }
582 : }
583 :
584 : /* for transition of active->inactive frame, apply passive downmix on buffers */
585 4095 : if ( hCPE->last_element_brate <= IVAS_SID_5k2 )
586 : {
587 3952 : delta = 1;
588 3952 : if ( output_frame == L_FRAME16k )
589 : {
590 1044 : delta = 2;
591 : }
592 2908 : else if ( output_frame == L_FRAME32k )
593 : {
594 1074 : delta = 4;
595 : }
596 1834 : else if ( output_frame == L_FRAME48k )
597 : {
598 1834 : delta = 6;
599 : }
600 :
601 3952 : delay_buf_out_len = delta * HQ_DELAY_COMP;
602 3952 : tcxltp_mem_in_len = NS2SA( sts[0]->output_Fs, TCXLTP_DELAY_NS );
603 :
604 3952 : assert( delay_buf_out_len > tcxltp_mem_in_len );
605 :
606 38728 : for ( i = 0; i < tcxltp_mem_in_len; i++ )
607 : {
608 34776 : sts[0]->hTcxLtpDec->tcxltp_mem_in[i] = INV_SQRT2 * ( sts[0]->hTcxLtpDec->tcxltp_mem_in[i] + sts[1]->hTcxLtpDec->tcxltp_mem_in[i] );
609 34776 : sts[0]->delay_buf_out[i] = INV_SQRT2 * ( sts[0]->delay_buf_out[i] + sts[1]->delay_buf_out[i] );
610 34776 : sts[0]->hHQ_core->old_out[i] = INV_SQRT2 * ( sts[0]->hHQ_core->old_out[i] + sts[1]->hHQ_core->old_out[i] );
611 34776 : sts[0]->hTcxLtpDec->tcxltp_mem_out[i] = INV_SQRT2 * ( sts[0]->hTcxLtpDec->tcxltp_mem_out[i] + sts[1]->hTcxLtpDec->tcxltp_mem_out[i] );
612 : }
613 143056 : for ( ; i < delay_buf_out_len; i++ )
614 : {
615 139104 : sts[0]->delay_buf_out[i] = INV_SQRT2 * ( sts[0]->delay_buf_out[i] + sts[1]->delay_buf_out[i] );
616 139104 : sts[0]->hHQ_core->old_out[i] = INV_SQRT2 * ( sts[0]->hHQ_core->old_out[i] + sts[1]->hHQ_core->old_out[i] );
617 139104 : sts[0]->hTcxLtpDec->tcxltp_mem_out[i] = INV_SQRT2 * ( sts[0]->hTcxLtpDec->tcxltp_mem_out[i] + sts[1]->hTcxLtpDec->tcxltp_mem_out[i] );
618 : }
619 2612152 : for ( ; i < output_frame; i++ )
620 : {
621 2608200 : sts[0]->hHQ_core->old_out[i] = INV_SQRT2 * ( sts[0]->hHQ_core->old_out[i] + sts[1]->hHQ_core->old_out[i] );
622 2608200 : sts[0]->hTcxLtpDec->tcxltp_mem_out[i] = INV_SQRT2 * ( sts[0]->hTcxLtpDec->tcxltp_mem_out[i] + sts[1]->hTcxLtpDec->tcxltp_mem_out[i] );
623 : }
624 : }
625 :
626 4095 : return;
627 : }
628 :
629 :
630 : /*-------------------------------------------------------------------*
631 : * applyDmxMdctStereo()
632 : *
633 : * apply passive downmix to certain buffers to enable smooth transitions
634 : * between active/inactive coding in MDCT-Stereo DTX
635 : *-------------------------------------------------------------------*/
636 :
637 48470 : void applyDmxMdctStereo(
638 : const CPE_DEC_HANDLE hCPE, /* i : CPE handle */
639 : float *output[CPE_CHANNELS], /* i/o: core decoder output */
640 : const int16_t output_frame /* i : output frame length */
641 : )
642 : {
643 : int16_t crossfade_len, i;
644 : int16_t dmx_len;
645 : float fade, step;
646 :
647 48470 : step = 1.f;
648 48470 : fade = 1.f;
649 48470 : dmx_len = output_frame;
650 :
651 48470 : if ( hCPE->last_element_brate <= IVAS_SID_5k2 )
652 : {
653 131 : crossfade_len = NS2SA( hCPE->hCoreCoder[0]->output_Fs, IVAS_DEC_DELAY_NS - DELAY_CLDFB_NS );
654 131 : step /= crossfade_len;
655 : }
656 : /* for first inactive CNG frame after active decoding we have to do a fade-OUT FROM the passive DMX */
657 48339 : else if ( hCPE->element_brate <= IVAS_SID_5k2 && hCPE->last_element_brate > IVAS_SID_5k2 )
658 : {
659 143 : crossfade_len = output_frame / 4;
660 143 : step /= -crossfade_len;
661 143 : fade = 0.f;
662 143 : dmx_len = crossfade_len;
663 : }
664 48196 : else if ( hCPE->last_element_mode == IVAS_CPE_DFT && hCPE->last_element_brate <= IVAS_32k )
665 : {
666 69 : crossfade_len = NS2SA( hCPE->hCoreCoder[0]->output_Fs, DELAY_CLDFB_NS );
667 69 : step /= crossfade_len;
668 : }
669 : else
670 : {
671 48127 : crossfade_len = 0;
672 : }
673 :
674 : /* apply crossfade */
675 88978 : for ( i = 0; i < crossfade_len; i++ )
676 : {
677 40508 : output[0][i] = output[0][i] * fade + ( output[0][i] + output[1][i] ) * INV_SQRT2 * ( 1 - fade );
678 40508 : fade -= step;
679 : }
680 :
681 : /* apply passive downmix on all-active-frame part */
682 34766362 : for ( ; i < dmx_len; i++ )
683 : {
684 34717892 : output[0][i] = ( output[0][i] + output[1][i] ) * INV_SQRT_2;
685 : }
686 :
687 48470 : return;
688 : }
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