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 10967237 : 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 10967237 : if ( !isSBAStereoMode )
72 : {
73 8776286 : nSubframes = ( sts[0]->core == TCX_10_CORE || ( sts[0]->core != sts[1]->core ) ) ? NB_DIV : 1;
74 8776286 : sfbConf = ( sts[0]->core == TCX_20_CORE ) ? &hStereoMdct->stbParamsTCX20 : &hStereoMdct->stbParamsTCX10;
75 8776286 : if ( sts[0]->last_core_from_bs == ACELP_CORE )
76 : {
77 36700 : sfbConf = &hStereoMdct->stbParamsTCX20afterACELP;
78 : }
79 :
80 8776286 : if ( hStereoMdct->use_itd )
81 : {
82 : int16_t I;
83 :
84 483490 : 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 483490 : hStereoMdct->itd = 0.f;
88 483490 : if ( hStereoMdct->itd_mode )
89 : {
90 108807 : /*(*nb_bits) += */ read_itd( st0, &I );
91 108807 : stereo_dft_dequantize_itd( &I, &hStereoMdct->itd, st0->output_Fs );
92 : }
93 : }
94 :
95 17791097 : for ( k = 0; k < nSubframes; k++ )
96 : {
97 9014811 : mdct_stereo_mode = get_next_indice( st0, 1 );
98 9014811 : if ( mdct_stereo_mode )
99 : {
100 8678466 : mdct_stereo_mode = 1 + get_next_indice( st0, 1 );
101 : }
102 9014811 : switch ( mdct_stereo_mode )
103 : {
104 336345 : case 0:
105 336345 : hStereoMdct->mdct_stereo_mode[k] = SMDCT_DUAL_MONO;
106 336345 : break;
107 6071944 : case 1:
108 6071944 : hStereoMdct->mdct_stereo_mode[k] = SMDCT_MS_FULL;
109 6071944 : break;
110 2606522 : case 2:
111 2606522 : hStereoMdct->mdct_stereo_mode[k] = SMDCT_BW_MS;
112 2606522 : break;
113 0 : default:
114 0 : assert( !"Not supported stereo mode\n" );
115 : }
116 :
117 9014811 : if ( !mct_on )
118 : {
119 3070238 : if ( sts[0]->core == sts[1]->core || k == 0 )
120 : {
121 3052834 : hStereoMdct->global_ild[k] = get_next_indice( st0, SMDCT_GLOBAL_ILD_BITS );
122 6002675 : assert( ( hStereoMdct->global_ild[k] > 0 ) && ( hStereoMdct->global_ild[k] < SMDCT_ILD_RANGE ) );
123 : }
124 : else
125 : {
126 17404 : hStereoMdct->global_ild[1] = hStereoMdct->global_ild[0];
127 : }
128 : }
129 :
130 9014811 : set_s( ms_mask[k], ( hStereoMdct->mdct_stereo_mode[k] == SMDCT_MS_FULL ) ? 1 : 0, sfbConf->nBandsStereoCore );
131 :
132 9014811 : if ( hStereoMdct->mdct_stereo_mode[k] == SMDCT_BW_MS )
133 : {
134 108621316 : for ( i = 0; i < sfbConf->nBandsStereoCore; i++ )
135 : {
136 106014794 : ms_mask[k][i] = get_next_indice( st0, 1 );
137 : }
138 : }
139 :
140 9014811 : if ( st0->igf )
141 : {
142 6101602 : mdct_stereo_mode = get_next_indice( st0, 1 );
143 6101602 : if ( mdct_stereo_mode )
144 : {
145 4011379 : mdct_stereo_mode = 1 + get_next_indice( st0, 1 );
146 : }
147 :
148 6101602 : switch ( mdct_stereo_mode )
149 : {
150 2090223 : case 0:
151 2090223 : hStereoMdct->IGFStereoMode[k] = SMDCT_DUAL_MONO;
152 2090223 : break;
153 2784739 : case 1:
154 2784739 : hStereoMdct->IGFStereoMode[k] = SMDCT_MS_FULL;
155 2784739 : break;
156 1226640 : case 2:
157 1226640 : hStereoMdct->IGFStereoMode[k] = SMDCT_BW_MS;
158 1226640 : break;
159 0 : default:
160 0 : assert( !"Not supported stereo mode\n" );
161 : }
162 :
163 6101602 : set_s( &ms_mask[k][sfbConf->nBandsStereoCore], ( hStereoMdct->IGFStereoMode[k] == SMDCT_MS_FULL ) ? 1 : 0, sfbConf->sfbCnt - sfbConf->nBandsStereoCore );
164 :
165 6101602 : if ( hStereoMdct->IGFStereoMode[k] == SMDCT_BW_MS )
166 : {
167 8314696 : for ( i = sfbConf->nBandsStereoCore; i < sfbConf->sfbCnt; i++ )
168 : {
169 7088056 : ms_mask[k][i] = get_next_indice( st0, 1 );
170 : }
171 : }
172 : }
173 : else
174 : {
175 2913209 : hStereoMdct->IGFStereoMode[k] = SMDCT_DUAL_MONO;
176 : }
177 : }
178 : }
179 :
180 10967237 : if ( !mct_on )
181 : {
182 5163210 : hStereoMdct->split_ratio = SMDCT_EQUAL_RATIO_RANGE; /* Equal bits to both channels */
183 5163210 : hStereoMdct->split_ratio = get_next_indice( st0, SMDCT_NBBITS_SPLIT_RATIO );
184 :
185 5163210 : 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 10967237 : 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 8955902 : 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 8955902 : STEREO_MDCT_BAND_PARAMETERS *sfbConf = NULL;
228 : float nrgRatio;
229 :
230 8955902 : nSubframes = 2;
231 8955902 : if ( ( core_l <= TCX_20_CORE && core_r <= TCX_20_CORE ) || tmp_plc_upmix )
232 : {
233 8715937 : nSubframes = 1;
234 : }
235 :
236 18151769 : for ( k = 0; k < nSubframes; k++ )
237 : {
238 9195867 : sfbConf = ( core_l == TCX_20_CORE ) ? &hStereoMdct->stbParamsTCX20 : &hStereoMdct->stbParamsTCX10;
239 :
240 9195867 : if ( last_core_l == ACELP_CORE || last_core_r == ACELP_CORE )
241 : {
242 37082 : sfbConf = &hStereoMdct->stbParamsTCX20afterACELP;
243 : }
244 :
245 9195867 : if ( mdct_stereo_mode[k] == SMDCT_MS_FULL )
246 : {
247 3096887739 : for ( i = 0; i < sfbConf->sfbOffset[sfbConf->nBandsStereoCore]; i++ )
248 : {
249 3090707012 : if ( spec_r_0[k][i] == 0.0f )
250 : {
251 1034309888 : spec_r[k][i] *= NF_RED_FAC;
252 : }
253 : }
254 6180727 : inverseMS( sfbConf->sfbOffset[sfbConf->nBandsStereoCore], spec_l[k], spec_r[k], SQRT2_OVER_2 );
255 : }
256 3015140 : else if ( mdct_stereo_mode[k] == SMDCT_BW_MS )
257 : {
258 111518531 : for ( sfb = 0; sfb < sfbConf->nBandsStereoCore; sfb++ )
259 : {
260 108845911 : if ( ms_mask[k][sfb] )
261 : {
262 938968682 : for ( i = sfbConf->sfbOffset[sfb]; i < sfbConf->sfbOffset[sfb + 1]; i++ )
263 : {
264 871302320 : if ( spec_r_0[k][i] == 0.0f )
265 : {
266 274139094 : spec_r[k][i] *= NF_RED_FAC;
267 : }
268 : }
269 67666362 : 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 9195867 : if ( igf )
281 : {
282 6191454 : if ( hStereoMdct->IGFStereoMode[k] == SMDCT_MS_FULL )
283 : {
284 889314745 : for ( i = sfbConf->sfbOffset[sfbConf->nBandsStereoCore]; i < sfbConf->sfbOffset[sfbConf->sfbCnt]; i++ )
285 : {
286 886494730 : if ( spec_r_0[k][i] == 0.0f )
287 : {
288 256572160 : spec_r[k][i] *= NF_RED_FAC;
289 : }
290 : }
291 2820015 : 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 3371439 : else if ( hStereoMdct->IGFStereoMode[k] == SMDCT_BW_MS )
294 : {
295 8388856 : for ( sfb = sfbConf->nBandsStereoCore; sfb < sfbConf->sfbCnt; sfb++ )
296 : {
297 7152893 : if ( ms_mask[k][sfb] )
298 : {
299 181109311 : for ( i = sfbConf->sfbOffset[sfb]; i < sfbConf->sfbOffset[sfb + 1]; i++ )
300 : {
301 177332544 : if ( spec_r_0[k][i] == 0.0f )
302 : {
303 49855876 : spec_r[k][i] *= NF_RED_FAC;
304 : }
305 : }
306 3776767 : 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 9195867 : if ( !mct_on )
319 : {
320 3251294 : nrgRatio = (float) SMDCT_ILD_RANGE / hStereoMdct->global_ild[k] - 1; /* nrgRatio = nrg[1]/nrg[0] */
321 3251294 : 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 3251294 : if ( hStereoMdct->smooth_ratio > 1.3f )
324 : {
325 666272 : hStereoMdct->reverse_dmx = 1;
326 : }
327 2585022 : else if ( hStereoMdct->smooth_ratio < 0.9f )
328 : {
329 678712 : hStereoMdct->reverse_dmx = 0;
330 : }
331 :
332 3251294 : if ( ( nrgRatio > 1.0f ) && ( k < ( ( core_r == TCX_10_CORE ) ? NB_DIV : 1 ) ) )
333 : {
334 1036499 : v_multc( spec_r[k], nrgRatio, spec_r[k], L_frameTCX_r );
335 : }
336 2214795 : else if ( ( nrgRatio < 1.0f ) && ( k < ( ( core_l == TCX_10_CORE ) ? NB_DIV : 1 ) ) )
337 : {
338 771869 : v_multc( spec_l[k], 1.0f / nrgRatio, spec_l[k], L_frameTCX_l );
339 : }
340 : }
341 : } /* for k */
342 :
343 8955902 : return;
344 : }
345 :
346 :
347 : /*-------------------------------------------------------------------*
348 : * inverseBwMS()
349 : *
350 : * Band-wise M/S stereo processing
351 : *-------------------------------------------------------------------*/
352 :
353 82629133 : 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 5143463407 : for ( j = startLine; j < stopLine; j++ )
365 : {
366 5060834274 : tmpValue = x0[j];
367 5060834274 : x0[j] = ( x0[j] + x1[j] ) * norm_fac;
368 5060834274 : x1[j] = ( tmpValue - x1[j] ) * norm_fac;
369 : }
370 :
371 82629133 : return;
372 : }
373 :
374 :
375 : /*-------------------------------------------------------------------*
376 : * inverseMS()
377 : *
378 : * M/S stereo processing
379 : *-------------------------------------------------------------------*/
380 :
381 11186004 : 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 11186004 : inverseBwMS( 0, L_frame, x0, x1, norm_fac );
389 :
390 11186004 : return;
391 : }
392 :
393 :
394 : /*-------------------------------------------------------------------*
395 : * initMdctStereoDecData()
396 : *
397 : * Initialize MDCT stereo decoder configuration
398 : *-------------------------------------------------------------------*/
399 :
400 18654527 : 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 18654527 : tcx_coded_lines = getNumTcxCodedLines( bwidth );
411 :
412 : /*Initialize sfb parameteres for TCX20 */
413 18654527 : 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 18654527 : 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 18654527 : 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 18654527 : if ( igf )
422 : {
423 : /* calculate the igf start band from the igf start line */
424 10113465 : stereo_mdct_init_igf_start_band( &( hStereoMdct->stbParamsTCX20 ), 1.0f, bwidth, element_brate );
425 10113465 : stereo_mdct_init_igf_start_band( &( hStereoMdct->stbParamsTCX10 ), 0.5f, bwidth, element_brate );
426 10113465 : stereo_mdct_init_igf_start_band( &( hStereoMdct->stbParamsTCX20afterACELP ), 1.25f, bwidth, element_brate );
427 : }
428 : else
429 : {
430 8541062 : hStereoMdct->stbParamsTCX20.sfbIgfStart = -1;
431 8541062 : hStereoMdct->stbParamsTCX10.sfbIgfStart = -1;
432 8541062 : hStereoMdct->stbParamsTCX20afterACELP.sfbIgfStart = -1;
433 8541062 : hStereoMdct->stbParamsTCX10.nBandsStereoCore = hStereoMdct->stbParamsTCX10.sfbCnt;
434 8541062 : hStereoMdct->stbParamsTCX20.nBandsStereoCore = hStereoMdct->stbParamsTCX20.sfbCnt;
435 8541062 : hStereoMdct->stbParamsTCX20afterACELP.nBandsStereoCore = hStereoMdct->stbParamsTCX20afterACELP.sfbCnt;
436 : }
437 :
438 18654527 : return;
439 : }
440 :
441 :
442 : /*-------------------------------------------------------------------*
443 : * initMdctStereoDtxData()
444 : *
445 : * Allocate and initialize structures for MDCT-Stereo DTX operation
446 : *-------------------------------------------------------------------*/
447 :
448 323 : ivas_error initMdctStereoDtxData(
449 : CPE_DEC_HANDLE hCPE /* i/o: CPE handle */
450 : )
451 : {
452 : int16_t ch;
453 : ivas_error error;
454 :
455 323 : error = IVAS_ERR_OK;
456 :
457 969 : for ( ch = 0; ch < CPE_CHANNELS; ch++ )
458 : {
459 646 : DEC_CORE_HANDLE st = hCPE->hCoreCoder[ch];
460 :
461 646 : 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 :
473 646 : if ( st->first_CNG == 0 )
474 : {
475 628 : if ( ch == 1 && st->cng_sba_flag )
476 : {
477 202 : st->hFdCngDec->hFdCngCom->seed += 3;
478 : }
479 : }
480 :
481 646 : if ( st->cldfbAna == NULL )
482 : {
483 : /* open analysis for max. sampling rate 48kHz */
484 452 : if ( ( error = openCldfb( &st->cldfbAna, CLDFB_ANALYSIS, 48000, CLDFB_PROTOTYPE_1_25MS ) ) != IVAS_ERR_OK )
485 : {
486 0 : return error;
487 : }
488 : }
489 :
490 646 : if ( st->cldfbBPF == NULL )
491 : {
492 : /* open analysis BPF for max. internal sampling rate 16kHz */
493 452 : if ( ( error = openCldfb( &st->cldfbBPF, CLDFB_ANALYSIS, 16000, CLDFB_PROTOTYPE_1_25MS ) ) != IVAS_ERR_OK )
494 : {
495 0 : return error;
496 : }
497 : }
498 : }
499 :
500 323 : return error;
501 : }
502 :
503 : /*-------------------------------------------------------------------*
504 : * synchonize_channels_mdct_sid()
505 : *
506 : * Synchronize channels in SID frame in MDCT stereo
507 : *-------------------------------------------------------------------*/
508 :
509 58811344 : 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 58811344 : st = sts[n];
517 :
518 58811344 : if ( st->element_mode == IVAS_CPE_MDCT && st->total_brate == SID_2k40 )
519 : {
520 12492 : if ( n == 1 )
521 : {
522 : /* synchronize channels */
523 6246 : sts[1]->L_frame = sts[0]->L_frame;
524 6246 : sts[1]->cng_type = sts[0]->cng_type;
525 6246 : sts[1]->bwidth = sts[0]->bwidth;
526 6246 : 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 6246 : 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 6246 : 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 12492 : 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 */
539 610 : configureFdCngDec( st->hFdCngDec, st->bwidth, st->element_brate, st->L_frame, st->last_L_frame, st->element_mode );
540 : }
541 : }
542 :
543 58811344 : 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 13830 : 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 13830 : sts[0] = hCPE->hCoreCoder[0];
566 13830 : sts[1] = hCPE->hCoreCoder[1];
567 :
568 : /* synch buffers for inactive frames, but not for transition frames */
569 13830 : if ( hCPE->last_element_brate <= IVAS_SID_5k2 )
570 : {
571 13309 : mvr2r( output[0], output[1], output_frame );
572 13309 : mvr2r( synth[0], synth[1], output_frame );
573 : }
574 :
575 13830 : 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 12602 : for ( int16_t p = 0; p < sts[0]->hFdCngDec->hFdCngCom->npart; p++ )
579 : {
580 12081 : 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 13830 : if ( hCPE->last_element_brate <= IVAS_SID_5k2 )
586 : {
587 13309 : delta = 1;
588 13309 : if ( output_frame == L_FRAME16k )
589 : {
590 4050 : delta = 2;
591 : }
592 9259 : else if ( output_frame == L_FRAME32k )
593 : {
594 4201 : delta = 4;
595 : }
596 5058 : else if ( output_frame == L_FRAME48k )
597 : {
598 5058 : delta = 6;
599 : }
600 :
601 13309 : delay_buf_out_len = delta * HQ_DELAY_COMP;
602 13309 : tcxltp_mem_in_len = NS2SA( sts[0]->output_Fs, TCXLTP_DELAY_NS );
603 :
604 13309 : assert( delay_buf_out_len > tcxltp_mem_in_len );
605 :
606 123813 : for ( i = 0; i < tcxltp_mem_in_len; i++ )
607 : {
608 110504 : sts[0]->hTcxLtpDec->tcxltp_mem_in[i] = INV_SQRT2 * ( sts[0]->hTcxLtpDec->tcxltp_mem_in[i] + sts[1]->hTcxLtpDec->tcxltp_mem_in[i] );
609 110504 : sts[0]->delay_buf_out[i] = INV_SQRT2 * ( sts[0]->delay_buf_out[i] + sts[1]->delay_buf_out[i] );
610 110504 : sts[0]->hHQ_core->old_out[i] = INV_SQRT2 * ( sts[0]->hHQ_core->old_out[i] + sts[1]->hHQ_core->old_out[i] );
611 110504 : 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 455325 : for ( ; i < delay_buf_out_len; i++ )
614 : {
615 442016 : sts[0]->delay_buf_out[i] = INV_SQRT2 * ( sts[0]->delay_buf_out[i] + sts[1]->delay_buf_out[i] );
616 442016 : sts[0]->hHQ_core->old_out[i] = INV_SQRT2 * ( sts[0]->hHQ_core->old_out[i] + sts[1]->hHQ_core->old_out[i] );
617 442016 : 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 8301109 : for ( ; i < output_frame; i++ )
620 : {
621 8287800 : sts[0]->hHQ_core->old_out[i] = INV_SQRT2 * ( sts[0]->hHQ_core->old_out[i] + sts[1]->hHQ_core->old_out[i] );
622 8287800 : 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 13830 : 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 240850 : 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 240850 : step = 1.f;
648 240850 : fade = 1.f;
649 240850 : dmx_len = output_frame;
650 :
651 240850 : if ( hCPE->last_element_brate <= IVAS_SID_5k2 )
652 : {
653 502 : crossfade_len = NS2SA( hCPE->hCoreCoder[0]->output_Fs, IVAS_DEC_DELAY_NS - DELAY_CLDFB_NS );
654 502 : 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 240348 : else if ( hCPE->element_brate <= IVAS_SID_5k2 && hCPE->last_element_brate > IVAS_SID_5k2 )
658 : {
659 521 : crossfade_len = output_frame / 4;
660 521 : step /= -crossfade_len;
661 521 : fade = 0.f;
662 521 : dmx_len = crossfade_len;
663 : }
664 239827 : else if ( hCPE->last_element_mode == IVAS_CPE_DFT && hCPE->last_element_brate <= IVAS_32k )
665 : {
666 585 : crossfade_len = NS2SA( hCPE->hCoreCoder[0]->output_Fs, DELAY_CLDFB_NS );
667 585 : step /= crossfade_len;
668 : }
669 : else
670 : {
671 239242 : crossfade_len = 0;
672 : }
673 :
674 : /* apply crossfade */
675 400670 : for ( i = 0; i < crossfade_len; i++ )
676 : {
677 159820 : output[0][i] = output[0][i] * fade + ( output[0][i] + output[1][i] ) * INV_SQRT2 * ( 1 - fade );
678 159820 : fade -= step;
679 : }
680 :
681 : /* apply passive downmix on all-active-frame part */
682 181220710 : for ( ; i < dmx_len; i++ )
683 : {
684 180979860 : output[0][i] = ( output[0][i] + output[1][i] ) * INV_SQRT_2;
685 : }
686 :
687 240850 : return;
688 : }
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