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 "cnst.h"
38 : #include "rom_com.h"
39 : #include "rom_dec.h"
40 : #include "prot.h"
41 : #include "ivas_prot.h"
42 : #include "ivas_cnst.h"
43 : #include "ivas_rom_com.h"
44 : #include "ivas_rom_dec.h"
45 : #ifdef DEBUGGING
46 : #include "debug.h"
47 : #endif
48 : #include "wmc_auto.h"
49 :
50 :
51 : /*-------------------------------------------------------------------*
52 : * Local constants
53 : *-------------------------------------------------------------------*/
54 :
55 : #define STEFI_DELAY_IND( d, buf_ind ) ( ( buf_ind ) + STEREO_DFT_PAST_MAX - ( d ) + 1 ) % STEREO_DFT_PAST_MAX
56 :
57 : #define STEREO_DFT_RES_RATIO_LIMIT 0.18f
58 : #define STEREO_DFT_LT_PREDGAIN_UPD 0.1f
59 : #define STEREO_DFT_VR_PREDGAIN_UPD 0.1f
60 : #define STEREO_DFT_STEFFI_PG_THRESHOLD 0.6f
61 : #define STEREO_DFT_STEFFI_RATIO_UP_HIGH 0.03f
62 : #define STEREO_DFT_STEFFI_RATIO_DOWN_HIGH 0.05f
63 : #define STEREO_DFT_STEFFI_RATIO_UP_LOW 0.1f
64 : #define STEREO_DFT_STEFFI_RATIO_DOWN_LOW 0.001f
65 : #define STEREO_DFT_STEFFI_DELAY_SHORT 2
66 : #define STEREO_DFT_STEFFI_DELAY_LONG 4
67 : #define STEREO_DFT_STEFFI_DELAY_OFFSET 2
68 : #define STEREO_DFT_STEFFI_GAIN_REST_AMT 0.6f
69 : #define STEREO_DFT_STEFFI_GAIN_AMP 1.0f
70 :
71 :
72 : #define STEREO_DFT_BPF_SIZE 40 /* BPF: Number of weights for BPF in DFT: 40*40Hz=1.6kHz*/
73 :
74 :
75 : /*-------------------------------------------------------------------------
76 : * Local function prototypes
77 : *-------------------------------------------------------------------------*/
78 :
79 : static void stereo_dft_dec_open( STEREO_DFT_DEC_DATA_HANDLE hStereoDft, const int32_t output_Fs, const int16_t nchan_transport );
80 :
81 : static void stereo_dft_compute_td_stefi_params( STEREO_DFT_DEC_DATA_HANDLE hStereoDft, const float samp_ratio );
82 :
83 : static void stereo_dft_adapt_sf_delay( STEREO_DFT_DEC_DATA_HANDLE hStereoDft, float *pPredGain );
84 :
85 :
86 : /*-------------------------------------------------------------------------
87 : * stereo_dft_dequantize_res_gains()
88 : *
89 : * joint dequantizer for side channel prediction gain and residual energy
90 : *-------------------------------------------------------------------------*/
91 :
92 16852650 : static void stereo_dft_dequantize_res_gains(
93 : int16_t *ind1,
94 : int16_t *ind2,
95 : float *gout,
96 : float *rout,
97 : const int16_t N )
98 : {
99 : int16_t i, index;
100 :
101 33705300 : for ( i = 0; i < N; i++ )
102 : {
103 : /* Ensure the indices are within range -- may go out of range due to frame loss */
104 16852650 : ind1[i] = check_bounds_s( ind1[i], 0, 30 );
105 16852650 : ind2[i] = check_bounds_s( ind2[i], 0, 7 );
106 16852650 : index = ( ( ind1[i] < 15 ? 15 - ind1[i] : ind1[i] - 15 ) << 3 ) + ind2[i];
107 16852650 : gout[i] = ind1[i] < 15 ? -dft_res_gains_q[index][0] : dft_res_gains_q[index][0];
108 16852650 : rout[i] = dft_res_gains_q[index][1];
109 : }
110 :
111 16852650 : return;
112 : }
113 :
114 : /*---------------------------------------------------------------------------
115 : * stereo_dft_dequantize_res_gains_f()
116 : *
117 : * returns interepolated values for non-integer indices
118 : *---------------------------------------------------------------------------*/
119 :
120 11121489 : static void stereo_dft_dequantize_res_gains_f(
121 : float *ind1,
122 : float *ind2,
123 : float *gout,
124 : float *rout,
125 : const int16_t N )
126 : {
127 : int16_t i, i1, j1, sign, ji, ij;
128 : float fi, fj;
129 :
130 22242978 : for ( i = 0; i < N; i++ )
131 : {
132 : /* Ensure the indices are within range -- may go out of range due to frame loss */
133 11121489 : ind1[i] = check_bounds( ind1[i], 0, 31 );
134 11121489 : ind2[i] = check_bounds( ind2[i], 0, 7 );
135 :
136 : /* compensate for the offset and extract/remove sign of first index */
137 11121489 : sign = ind1[i] < 15 ? -1 : 1;
138 11121489 : i1 = (int16_t) floorf( ind1[i] < 15 ? 15 - ind1[i] : ind1[i] - 15 );
139 11121489 : fi = ( ind1[i] < 15 ? 15 - ind1[i] : ind1[i] - 15 ) - i1;
140 :
141 11121489 : j1 = (int16_t) floorf( ind2[i] );
142 11121489 : fj = ind2[i] - j1;
143 :
144 : /* choose base indices for interpolation */
145 11121489 : ji = min( fj < .5 ? j1 : j1 + 1, 7 );
146 11121489 : ij = min( fi < .5 ? i1 : i1 + 1, 15 );
147 :
148 : /* interpolate values from table */
149 11121489 : if ( i1 < 15 )
150 : {
151 10807062 : gout[i] = sign * ( ( 1 - fi ) * dft_res_gains_q[( i1 << 3 ) + ji][0] + fi * dft_res_gains_q[( ( i1 + 1 ) << 3 ) + ji][0] );
152 : }
153 : else
154 : {
155 314427 : gout[i] = sign * dft_res_gains_q[120 + ji][0];
156 : }
157 :
158 11121489 : if ( j1 < 7 )
159 : {
160 11117628 : rout[i] = ( 1 - fj ) * dft_res_gains_q[( ij << 3 ) + j1][1] + fj * dft_res_gains_q[( ij << 3 ) + j1 + 1][1];
161 : }
162 : else
163 : {
164 3861 : rout[i] = dft_res_gains_q[( ij << 3 ) + 7][1];
165 : }
166 : }
167 :
168 11121489 : return;
169 : }
170 :
171 :
172 : /*-------------------------------------------------------------------------
173 : * stereo_dft_dequantize_ipd()
174 : *
175 : * Dequantize IPDs
176 : *-------------------------------------------------------------------------*/
177 :
178 48636 : static void stereo_dft_dequantize_ipd(
179 : int16_t *ind,
180 : float *out,
181 : const int16_t N,
182 : const int16_t bits )
183 : {
184 : int16_t i;
185 : float delta;
186 :
187 48636 : if ( bits == 2 ) /* 2-bit phase quantization for the highest frequency band only */
188 : {
189 1200 : delta = EVS_PI / 2.f;
190 : }
191 47436 : else if ( bits == 3 )
192 : {
193 0 : delta = EVS_PI / 4.f;
194 : }
195 47436 : else if ( bits == 4 )
196 : {
197 47436 : delta = EVS_PI / 8.f;
198 : }
199 : else
200 : {
201 0 : delta = EVS_PI / 4.f;
202 0 : assert( 0 );
203 : }
204 :
205 97272 : for ( i = 0; i < N; i++ )
206 : {
207 48636 : out[i] = ind[i] * delta - EVS_PI;
208 : }
209 :
210 48636 : return;
211 : }
212 :
213 :
214 : /*-------------------------------------------------------------------------
215 : * stereo_dft_dequantize_itd()
216 : *
217 : * Dequantize ITDs
218 : *-------------------------------------------------------------------------*/
219 :
220 522366 : void stereo_dft_dequantize_itd(
221 : int16_t *ind,
222 : float *out,
223 : const int32_t output_Fs )
224 : {
225 : int16_t itd;
226 : int16_t mask;
227 :
228 522366 : mask = ( 1 << ( STEREO_DFT_ITD_NBITS - 1 ) ) - 1;
229 522366 : itd = ( ind[0] & mask ) + STEREO_DFT_ITD_MIN;
230 :
231 522366 : if ( ( ind[0] >> ( STEREO_DFT_ITD_NBITS - 1 ) ) )
232 : {
233 202407 : itd *= -1;
234 : }
235 522366 : assert( ( ABSVAL( itd ) <= STEREO_DFT_ITD_MAX ) && ( ABSVAL( itd ) >= STEREO_DFT_ITD_MIN ) );
236 :
237 : /*Convert back @ fs*/
238 522366 : *out = (float) ( itd * output_Fs ) / ( (float) ( STEREO_DFT_ITD_FS ) );
239 :
240 522366 : return;
241 : }
242 :
243 :
244 : /*-------------------------------------------------------------------------
245 : * stereo_dft_dec_create()
246 : *
247 : * Create DFT stereo handle
248 : *------------------------------------------------------------------------*/
249 :
250 52425 : ivas_error stereo_dft_dec_create(
251 : STEREO_DFT_DEC_DATA_HANDLE *hStereoDft, /* i/o: decoder DFT stereo handle */
252 : const int32_t element_brate, /* i : element bitrate */
253 : const int32_t output_Fs, /* i : output sampling rate */
254 : const int16_t sba_dirac_stereo_flag, /* i : signal stereo output for SBA DirAC */
255 : const int16_t nchan_transport /* i : number of transport channels */
256 : )
257 : {
258 : STEREO_DFT_DEC_DATA_HANDLE hStereoDft_loc;
259 : int16_t tmpS;
260 :
261 52425 : if ( *hStereoDft != NULL )
262 : {
263 0 : return IVAS_ERROR( IVAS_ERR_INTERNAL_FATAL, "Error: DFT Stereo memory already allocated\n" );
264 : }
265 :
266 52425 : if ( ( hStereoDft_loc = (STEREO_DFT_DEC_DATA_HANDLE) malloc( sizeof( STEREO_DFT_DEC_DATA ) ) ) == NULL )
267 : {
268 0 : return ( IVAS_ERROR( IVAS_ERR_FAILED_ALLOC, "Can not allocate memory for DFT Stereo\n" ) );
269 : }
270 :
271 52425 : if ( ( hStereoDft_loc->hConfig = (STEREO_DFT_CONFIG_DATA_HANDLE) malloc( sizeof( STEREO_DFT_CONFIG_DATA ) ) ) == NULL )
272 : {
273 0 : return ( IVAS_ERROR( IVAS_ERR_FAILED_ALLOC, "Can not allocate memory for DFT Stereo Config\n" ) );
274 : }
275 :
276 52425 : if ( ( hStereoDft_loc->hBpf = (BPF_DEC_HANDLE) malloc( sizeof( BPF_DEC_DATA ) ) ) == NULL )
277 : {
278 0 : return ( IVAS_ERROR( IVAS_ERR_FAILED_ALLOC, "Can not allocate memory for BPF handle\n" ) );
279 : }
280 :
281 52425 : if ( ( hStereoDft_loc->hTcxLtpDec = (TCX_LTP_DEC_HANDLE) malloc( sizeof( TCX_LTP_DEC_DATA ) ) ) == NULL )
282 : {
283 0 : return ( IVAS_ERROR( IVAS_ERR_FAILED_ALLOC, "Can not allocate memory for TCX-LTP handle\n" ) );
284 : }
285 :
286 52425 : hStereoDft_loc->hConfig->force_mono_transmission = 0;
287 :
288 52425 : if ( sba_dirac_stereo_flag )
289 : {
290 1908 : ivas_sba_dirac_stereo_config( hStereoDft_loc->hConfig );
291 : }
292 : else
293 : {
294 50517 : stereo_dft_config( hStereoDft_loc->hConfig, element_brate, &tmpS, &tmpS );
295 : }
296 :
297 52425 : stereo_dft_dec_open( hStereoDft_loc, output_Fs, nchan_transport );
298 :
299 52425 : *hStereoDft = hStereoDft_loc;
300 :
301 52425 : return IVAS_ERR_OK;
302 : }
303 :
304 :
305 : /*-------------------------------------------------------------------------
306 : * stereo_dft_dec_open()
307 : *
308 : * Open DFT decoder stereo handle
309 : *-------------------------------------------------------------------------*/
310 :
311 52425 : static void stereo_dft_dec_open(
312 : STEREO_DFT_DEC_DATA_HANDLE hStereoDft, /* i/o: decoder DFT stereo handle */
313 : const int32_t output_Fs, /* i : output sampling rate */
314 : const int16_t nchan_transport /* i : number of transport channels */
315 : )
316 : {
317 : /*Sizes*/
318 52425 : hStereoDft->N = (int16_t) ( STEREO_DFT_HOP_MAX * output_Fs / 48000 );
319 :
320 : /*Init. DFT sizes*/
321 52425 : hStereoDft->NFFT = (int16_t) ( STEREO_DFT32MS_N_MAX * output_Fs / 48000 );
322 :
323 52425 : hStereoDft->dft_trigo_8k = dft_trigo_32k;
324 52425 : hStereoDft->dft_trigo_12k8 = dft_trigo_12k8;
325 52425 : hStereoDft->dft_trigo_16k = dft_trigo_32k;
326 :
327 52425 : hStereoDft->dft32ms_ovl = (int16_t) ( ( STEREO_DFT32MS_OVL_MAX * output_Fs ) / 48000 );
328 52425 : hStereoDft->win232ms_8k = dft_win232ms_8k;
329 52425 : hStereoDft->win232ms_12k8 = dft_win232ms_12k8;
330 52425 : hStereoDft->win232ms_16k = dft_win232ms_16k;
331 :
332 52425 : hStereoDft->dft32ms_ovl2 = (int16_t) ( ( STEREO_DFT32MS_OVL2_MAX * output_Fs ) / 48000 );
333 52425 : hStereoDft->win32ms_8k = dft_win232ms_8k + 1;
334 52425 : hStereoDft->win32ms_12k8 = dft_win232ms_12k8 + 1;
335 52425 : hStereoDft->win32ms_16k = dft_win232ms_16k + 1;
336 :
337 52425 : if ( output_Fs == 16000 )
338 : {
339 3534 : hStereoDft->dft_trigo = dft_trigo_32k;
340 3534 : hStereoDft->dft_trigo_step = STEREO_DFT_TRIGO_SRATE_16k_STEP;
341 3534 : hStereoDft->win232ms = dft_win232ms_16k;
342 3534 : hStereoDft->win32ms = dft_win232ms_16k + 1;
343 : }
344 48891 : else if ( output_Fs == 32000 )
345 : {
346 7605 : hStereoDft->dft_trigo = dft_trigo_32k;
347 7605 : hStereoDft->dft_trigo_step = STEREO_DFT_TRIGO_SRATE_32k_STEP;
348 7605 : hStereoDft->win232ms = dft_win232ms_32k;
349 7605 : hStereoDft->win32ms = dft_win232ms_32k + 1;
350 : }
351 : else
352 : {
353 41286 : assert( output_Fs == 48000 );
354 41286 : hStereoDft->dft_trigo = dft_trigo_48k;
355 41286 : hStereoDft->dft_trigo_step = STEREO_DFT_TRIGO_SRATE_48k_STEP;
356 41286 : hStereoDft->win232ms = dft_win232ms_48k;
357 41286 : hStereoDft->win32ms = dft_win232ms_48k + 1;
358 : }
359 :
360 52425 : hStereoDft->win_8k = dft_win_8k;
361 :
362 : /*Bands: find the number of bands, Nyquist freq. is not taken into account*/
363 52425 : set_s( hStereoDft->band_res, hStereoDft->hConfig->band_res, STEREO_DFT_DEC_DFT_NB );
364 :
365 52425 : hStereoDft->nbands = stereo_dft_band_config( hStereoDft->band_limits, hStereoDft->band_res[0], hStereoDft->NFFT, DEC );
366 52425 : hStereoDft->hb_stefi_delay = NS2SA( output_Fs, STEREO_DFT_TD_STEFI_DELAY_NS );
367 :
368 52425 : if ( nchan_transport > 2 )
369 : {
370 756 : hStereoDft->min_smooth_gains = min_smooth_gains2;
371 756 : hStereoDft->max_smooth_gains = max_smooth_gains2;
372 : }
373 : else
374 : {
375 51669 : hStereoDft->min_smooth_gains = min_smooth_gains1;
376 51669 : hStereoDft->max_smooth_gains = max_smooth_gains1;
377 : }
378 :
379 : /* reset DFT stereo memories */
380 52425 : stereo_dft_dec_reset( hStereoDft );
381 :
382 52425 : return;
383 : }
384 :
385 :
386 : /*-------------------------------------------------------------------------
387 : * stereo_dft_dec_reset()
388 : *
389 : * Reset DFT stereo memories
390 : *------------------------------------------------------------------------*/
391 :
392 52425 : void stereo_dft_dec_reset(
393 : STEREO_DFT_DEC_DATA_HANDLE hStereoDft /* i/o: decoder DFT stereo handle */
394 : )
395 : {
396 : int16_t i;
397 : int16_t j, b;
398 :
399 : /*Configuration*/
400 52425 : set_s( hStereoDft->prm_res, hStereoDft->hConfig->prm_res, STEREO_DFT_DEC_DFT_NB );
401 :
402 : /* SIDE_GAIN */
403 52425 : set_s( hStereoDft->side_gain_index, 15, STEREO_DFT_BAND_MAX );
404 52425 : set_s( hStereoDft->side_gain_index_previous, 15, STEREO_DFT_BAND_MAX );
405 :
406 : /*residual prediction*/
407 52425 : set_s( hStereoDft->res_pred_mode, hStereoDft->hConfig->res_pred_mode, STEREO_DFT_DEC_DFT_NB );
408 262125 : for ( i = 0; i < STEREO_DFT_PAST_MAX; i++ )
409 : {
410 209700 : set_zero( hStereoDft->DFT_past_DMX[i], STEREO_DFT32MS_N_32k );
411 209700 : set_zero( hStereoDft->past_res_pred_gain[i], STEREO_DFT_BAND_MAX );
412 : }
413 :
414 52425 : hStereoDft->past_DMX_pos = 0;
415 :
416 52425 : set_s( hStereoDft->res_pred_index_previous, 0, STEREO_DFT_BAND_MAX );
417 :
418 733950 : for ( i = 0; i < STEREO_DFT_BAND_MAX; i++ )
419 : {
420 681525 : hStereoDft->res_gains_ind[0][i] = 15.f;
421 : }
422 :
423 52425 : set_zero( hStereoDft->res_gains_ind[1], STEREO_DFT_BAND_MAX );
424 :
425 : /*residual coding*/
426 52425 : set_s( hStereoDft->res_cod_mode, hStereoDft->hConfig->res_cod_mode, STEREO_DFT_DEC_DFT_NB );
427 52425 : hStereoDft->res_cod_band_max = dft_band_res_cod[hStereoDft->hConfig->band_res][hStereoDft->hConfig->res_cod_mode];
428 52425 : set_zero( hStereoDft->res_cod_mem, STEREO_DFT_OVL_8k );
429 :
430 52425 : hStereoDft->res_pred_band_min = max( STEREO_DFT_RES_PRED_BAND_MIN, hStereoDft->res_cod_band_max );
431 :
432 52425 : hStereoDft->stab_fac_smooth_res = 0.f;
433 52425 : bass_psfilter_init( hStereoDft->hBpf );
434 :
435 52425 : tcxltp_dec_init( hStereoDft->hTcxLtpDec, 0, MODE1, IVAS_CPE_DFT, PIT_MAX, 12800 );
436 :
437 52425 : hStereoDft->reverb_flag = 0;
438 :
439 52425 : hStereoDft->bpf_error_signal_last = 0.0f;
440 52425 : hStereoDft->bpf_error_ratio_mem = 1.0f;
441 52425 : hStereoDft->res_hb_nrg_mem = 0.0f;
442 :
443 : /*reset parameters*/
444 52425 : set_zero( hStereoDft->side_gain, STEREO_DFT_DEC_DFT_NB * STEREO_DFT_BAND_MAX );
445 52425 : set_zero( hStereoDft->gipd, STEREO_DFT_DEC_DFT_NB );
446 52425 : set_zero( hStereoDft->itd, STEREO_DFT_DEC_DFT_NB );
447 52425 : set_zero( hStereoDft->res_pred_gain, STEREO_DFT_DEC_DFT_NB * STEREO_DFT_BAND_MAX );
448 :
449 52425 : hStereoDft->wasTransient = 0;
450 52425 : hStereoDft->attackPresent = 0;
451 :
452 52425 : hStereoDft->lt_pred_gain = 0.0f;
453 52425 : hStereoDft->lt_pred_gain_variation = 0.0f;
454 52425 : hStereoDft->lt_var_mean_ratio = STEREO_DFT_RES_RATIO_LIMIT;
455 52425 : hStereoDft->stefi_short_gain = 1.0f;
456 52425 : hStereoDft->stefi_long_gain = 0.0f;
457 :
458 52425 : set_zero( hStereoDft->g_state, STEREO_DFT_BAND_MAX );
459 :
460 52425 : init_basic_allpass( &hStereoDft->ap1, dft_ap_gains[0], dft_ap_delays[0] );
461 52425 : init_basic_allpass( &hStereoDft->ap2, dft_ap_gains[1], dft_ap_delays[1] );
462 52425 : init_basic_allpass( &hStereoDft->ap3, dft_ap_gains[2], dft_ap_delays[2] );
463 :
464 52425 : set_zero( hStereoDft->ap_delay_mem, NS2SA( 16000, DELAY_BWE_TOTAL_NS ) );
465 52425 : set_zero( hStereoDft->ap_fade_mem, STEREO_DFT_ALLPASS_FADELEN_16k );
466 52425 : hStereoDft->ap_wasTransient = 0;
467 52425 : set_zero( hStereoDft->smooth_dmx_nrg, STEREO_DFT_BAND_MAX );
468 52425 : set_zero( hStereoDft->smooth_res_nrg, STEREO_DFT_BAND_MAX );
469 :
470 52425 : set_s( hStereoDft->core_hist, ACELP_CORE, STEREO_DFT_CORE_HIST_MAX );
471 :
472 52425 : set_zero( hStereoDft->hb_stefi_sig, L_FRAME48k + NS2SA( 48000, STEREO_DFT_TD_STEFI_DELAY_NS ) );
473 52425 : set_zero( hStereoDft->hb_nrg, STEREO_DFT_CORE_HIST_MAX );
474 52425 : set_zero( hStereoDft->td_gain, STEREO_DFT_CORE_HIST_MAX );
475 :
476 : /* PLC parameters */
477 52425 : set_zero( hStereoDft->res_mem, STEREO_DFT_RES_BW_MAX );
478 52425 : hStereoDft->time_offs = 0;
479 52425 : hStereoDft->past_dmx_nrg = 0;
480 52425 : hStereoDft->sg_mean = 0.0f;
481 52425 : hStereoDft->sg_mem_corrupt = 0;
482 52425 : hStereoDft->recovery_flg = 0;
483 :
484 681525 : for ( i = 0; i < SBA_DIRAC_STEREO_NUM_BANDS; i++ )
485 : {
486 629100 : set_zero( hStereoDft->smooth_buf[i], SBA_DIRAC_NRG_SMOOTH_LONG + 1 );
487 : }
488 52425 : set_zero( hStereoDft->smooth_fac[0], SBA_DIRAC_STEREO_NUM_BANDS );
489 52425 : set_zero( hStereoDft->smooth_fac[1], SBA_DIRAC_STEREO_NUM_BANDS );
490 :
491 52425 : hStereoDft->itd_xfade_target = 0.0f;
492 52425 : hStereoDft->itd_xfade_step = 0.0f;
493 52425 : hStereoDft->itd_xfade_counter = 0;
494 52425 : hStereoDft->itd_xfade_prev = 0.0f;
495 52425 : hStereoDft->last_active_element_brate = 0;
496 52425 : hStereoDft->ipd_xfade_target = 0.0f;
497 52425 : hStereoDft->ipd_xfade_step = 0.0f;
498 52425 : hStereoDft->ipd_xfade_counter = 0;
499 52425 : hStereoDft->ipd_xfade_prev = 0.0f;
500 :
501 600024 : for ( b = 0; b < hStereoDft->nbands; b++ )
502 : {
503 1642797 : for ( i = 0; i < 2; i++ )
504 : {
505 5475990 : for ( j = 0; j < 4; j++ )
506 : {
507 4380792 : hStereoDft->mixer_mat_smooth[i][j][b] = 0.0f;
508 : }
509 : }
510 : }
511 52425 : hStereoDft->first_frame = 1;
512 52425 : hStereoDft->g_L_prev = 0.f;
513 52425 : hStereoDft->g_R_prev = 0.f;
514 :
515 52425 : return;
516 : }
517 :
518 :
519 : /*-------------------------------------------------------------------------
520 : * stereo_dft_dec_update()
521 : *
522 : * Update DFT memories for new frame
523 : *-------------------------------------------------------------------------*/
524 :
525 2428773 : void stereo_dft_dec_update(
526 : STEREO_DFT_DEC_DATA_HANDLE hStereoDft, /* i/o: decoder DFT stereo handle */
527 : const int16_t output_frame, /* i : output frame length */
528 : const int16_t sba_dirac_stereo_flag /* i : signal stereo output for SBA DirAC */
529 : )
530 : {
531 : int16_t b, i, k_offset;
532 :
533 : /* Initialization */
534 2428773 : k_offset = STEREO_DFT_OFFSET; /*Add an offset*/
535 :
536 : /* Update parameters */
537 34002822 : for ( i = 0; i < k_offset * STEREO_DFT_BAND_MAX; i++ )
538 : {
539 31574049 : hStereoDft->side_gain[i] = hStereoDft->side_gain[STEREO_DFT_NBDIV * STEREO_DFT_BAND_MAX + i];
540 31574049 : hStereoDft->res_pred_gain[i] = hStereoDft->res_pred_gain[STEREO_DFT_NBDIV * STEREO_DFT_BAND_MAX + i];
541 : }
542 :
543 4857546 : for ( i = 0; i < k_offset; i++ )
544 : {
545 2428773 : hStereoDft->gipd[i] = hStereoDft->gipd[STEREO_DFT_NBDIV + i];
546 : }
547 :
548 : /* Update configuration memories */
549 4857546 : for ( i = 0; i < k_offset; i++ )
550 : {
551 2428773 : hStereoDft->band_res[i] = hStereoDft->band_res[i + STEREO_DFT_NBDIV];
552 2428773 : hStereoDft->prm_res[i] = hStereoDft->prm_res[i + STEREO_DFT_NBDIV];
553 2428773 : hStereoDft->itd[i] = hStereoDft->itd[STEREO_DFT_NBDIV + i];
554 2428773 : hStereoDft->res_cod_mode[i] = hStereoDft->res_cod_mode[i + STEREO_DFT_NBDIV];
555 2428773 : hStereoDft->res_pred_mode[i] = hStereoDft->res_pred_mode[i + STEREO_DFT_NBDIV];
556 : }
557 :
558 : /* Load new configurations */
559 2428773 : set_s( hStereoDft->band_res + k_offset, hStereoDft->hConfig->band_res, STEREO_DFT_NBDIV );
560 2428773 : set_s( hStereoDft->prm_res + k_offset, hStereoDft->hConfig->prm_res, STEREO_DFT_NBDIV );
561 2428773 : set_s( hStereoDft->res_pred_mode + k_offset, hStereoDft->hConfig->res_pred_mode, STEREO_DFT_NBDIV );
562 2428773 : set_s( hStereoDft->res_cod_mode + k_offset, hStereoDft->hConfig->res_cod_mode, STEREO_DFT_NBDIV );
563 :
564 : /*Update attack info*/
565 2428773 : if ( hStereoDft->attackPresent )
566 : {
567 48420 : hStereoDft->wasTransient = 1;
568 : }
569 2380353 : else if ( hStereoDft->wasTransient )
570 : {
571 42102 : hStereoDft->wasTransient = 0;
572 : }
573 :
574 7286319 : for ( i = STEREO_DFT_CORE_HIST_MAX - 1; i > 0; i-- )
575 : {
576 4857546 : hStereoDft->core_hist[i] = hStereoDft->core_hist[i - 1];
577 : }
578 :
579 2428773 : mvr2r( hStereoDft->hb_stefi_sig + output_frame, hStereoDft->hb_stefi_sig, hStereoDft->hb_stefi_delay );
580 2428773 : mvr2r( hStereoDft->hb_nrg, hStereoDft->hb_nrg + 1, STEREO_DFT_CORE_HIST_MAX - 1 );
581 2428773 : mvr2r( hStereoDft->td_gain, hStereoDft->td_gain + 1, STEREO_DFT_CORE_HIST_MAX - 1 );
582 :
583 2428773 : if ( sba_dirac_stereo_flag )
584 : {
585 : /* buffer update, push back by 2 because of 2 subframes */
586 3395874 : for ( b = 0; b < hStereoDft->nbands; b++ )
587 : {
588 30950970 : for ( i = SBA_DIRAC_NRG_SMOOTH_LONG; i > 1; i-- )
589 : {
590 27855873 : hStereoDft->smooth_buf[b][i] = hStereoDft->smooth_buf[b][i - 2];
591 : }
592 : }
593 : }
594 :
595 2428773 : return;
596 : }
597 :
598 :
599 : /*-------------------------------------------------------------------------
600 : * stereo_dft_dec_destroy()
601 : *
602 : * destroy DFT stereo handle
603 : *-------------------------------------------------------------------------*/
604 :
605 52425 : void stereo_dft_dec_destroy(
606 : STEREO_DFT_DEC_DATA_HANDLE *hStereoDft_glob /* i/o: decoder DFT stereo handle */
607 : )
608 : {
609 : STEREO_DFT_DEC_DATA_HANDLE hStereoDft;
610 :
611 52425 : hStereoDft = *hStereoDft_glob;
612 :
613 52425 : if ( hStereoDft->hConfig != NULL )
614 : {
615 52425 : free( hStereoDft->hConfig );
616 52425 : hStereoDft->hConfig = NULL;
617 : }
618 :
619 52425 : if ( hStereoDft->hBpf != NULL )
620 : {
621 52425 : free( hStereoDft->hBpf );
622 52425 : hStereoDft->hBpf = NULL;
623 : }
624 :
625 52425 : if ( hStereoDft->hTcxLtpDec != NULL )
626 : {
627 52425 : free( hStereoDft->hTcxLtpDec );
628 52425 : hStereoDft->hTcxLtpDec = NULL;
629 : }
630 :
631 52425 : free( hStereoDft );
632 52425 : hStereoDft = NULL;
633 :
634 52425 : return;
635 : }
636 :
637 :
638 : /*-------------------------------------------------------------------------
639 : * stereo_dft_dec_analyze()
640 : *
641 : * DFT analysis on a 20ms frame
642 : *-------------------------------------------------------------------------*/
643 :
644 7579677 : void stereo_dft_dec_analyze(
645 : CPE_DEC_HANDLE hCPE, /* i/o: CPE decoder structure */
646 : const float *input, /* i : input signal */
647 : float out_DFT[CPE_CHANNELS][STEREO_DFT_BUF_MAX], /* o : DFT buffers */
648 : const int16_t chan, /* i : channel number */
649 : const int16_t input_frame, /* i : input frame size */
650 : const int16_t output_frame, /* i : output frame size */
651 : const DFT_STEREO_DEC_ANA_TYPE ana_type, /* i : type of signal to analyse */
652 : const int16_t k_offset, /* i : offset of DFT */
653 : const int16_t delay /* i : delay in samples for input signal */
654 : )
655 : {
656 : int16_t i, k;
657 : STEREO_DFT_DEC_DATA_HANDLE hStereoDft;
658 : float *pInput, *pInput_buff;
659 : float *mem, input_buff[STEREO_DFT32MS_OVL_MAX + L_FRAME48k];
660 : float DFT[STEREO_DFT32MS_N_MAX], *pDFT_out;
661 : int16_t NFFT, NFFT_core, ovl, zp;
662 : #if defined( DEBUG_MODE_DFT ) || defined( DEBUG_STEREO_DFT_NOCORE )
663 : int16_t N;
664 : #endif
665 : int16_t offset;
666 : float fac;
667 : const float *trigo, *win_left, *win_right, *win2;
668 : float trigo_dec[STEREO_DFT32MS_N_MAX / 2 + 1];
669 : int16_t trigo_step;
670 : int32_t inputFs;
671 : int16_t delay_dec;
672 : int16_t mem_size;
673 : int16_t ovl2;
674 :
675 7579677 : push_wmops( "DFT_analysis" );
676 :
677 7579677 : hStereoDft = hCPE->hStereoDft;
678 :
679 7579677 : assert( output_frame == STEREO_DFT_NBDIV * hStereoDft->N );
680 :
681 : /*-----------------------------------------------------------------*
682 : * Initialization
683 : *-----------------------------------------------------------------*/
684 :
685 7579677 : if ( input_frame == output_frame )
686 : {
687 2839599 : trigo = hStereoDft->dft_trigo;
688 2839599 : trigo_step = hStereoDft->dft_trigo_step * STEREO_DFT_TRIGO_DEC_STEP;
689 2839599 : win_right = hStereoDft->win32ms;
690 2839599 : win_left = hStereoDft->win32ms;
691 2839599 : win2 = hStereoDft->win232ms;
692 :
693 2839599 : if ( ana_type == DFT_STEREO_DEC_ANA_BPF )
694 : {
695 204519 : assert( ( chan == 0 ) && "DFT stereo: BPF memory only for M channel" );
696 204519 : mem = hCPE->input_mem_BPF[chan];
697 : }
698 2635080 : else if ( ana_type == DFT_STEREO_DEC_ANA_LB || ana_type == DFT_STEREO_DEC_ANA_LB_ADD )
699 : {
700 101985 : mem = hCPE->input_mem_LB[chan];
701 : }
702 : else
703 : {
704 2533095 : mem = hCPE->input_mem[chan];
705 : }
706 : }
707 4740078 : else if ( input_frame == L_FRAME )
708 : {
709 2175435 : trigo = hStereoDft->dft_trigo_12k8;
710 2175435 : trigo_step = STEREO_DFT_TRIGO_SRATE_12k8_STEP * STEREO_DFT_TRIGO_DEC_STEP;
711 2175435 : win_right = hStereoDft->win32ms_12k8;
712 2175435 : win_left = hStereoDft->win32ms_12k8;
713 2175435 : win2 = hStereoDft->win232ms_12k8;
714 :
715 2175435 : if ( ana_type == DFT_STEREO_DEC_ANA_BPF )
716 : {
717 868368 : assert( ( chan == 0 ) && "DFT stereo: BPF memory only for M channel" );
718 868368 : mem = hCPE->input_mem_BPF[chan];
719 : }
720 1307067 : else if ( ana_type == DFT_STEREO_DEC_ANA_LB || ana_type == DFT_STEREO_DEC_ANA_LB_ADD )
721 : {
722 615579 : mem = hCPE->input_mem_LB[chan];
723 : }
724 : else
725 : {
726 691488 : assert( ( chan == 1 ) && "12.8kHz sampling rate only for second channel, i.e. residual coding or allpass signal" );
727 691488 : mem = hCPE->input_mem[chan];
728 : }
729 : }
730 2564643 : else if ( input_frame == L_FRAME16k )
731 : {
732 1912704 : trigo = hStereoDft->dft_trigo_16k;
733 1912704 : trigo_step = STEREO_DFT_TRIGO_SRATE_16k_STEP * STEREO_DFT_TRIGO_DEC_STEP;
734 1912704 : win_right = hStereoDft->win32ms_16k;
735 1912704 : win_left = hStereoDft->win32ms_16k;
736 1912704 : win2 = hStereoDft->win232ms_16k;
737 :
738 1912704 : if ( ana_type == DFT_STEREO_DEC_ANA_BPF )
739 : {
740 965310 : assert( ( chan == 0 ) && "DFT stereo: BPF memory only for M channel" );
741 965310 : mem = hCPE->input_mem_BPF[chan];
742 : }
743 947394 : else if ( ana_type == DFT_STEREO_DEC_ANA_LB || ana_type == DFT_STEREO_DEC_ANA_LB_ADD )
744 : {
745 458232 : mem = hCPE->input_mem_LB[chan];
746 : }
747 : else
748 : {
749 489162 : assert( ( chan == 1 ) && hCPE->hStereoDft->hConfig->res_pred_mode == STEREO_DFT_RESPRED_ESF && "16kHz sampling rate only for second channel with allpass signal" );
750 489162 : mem = hCPE->input_mem[chan];
751 : }
752 : }
753 651939 : else if ( input_frame == L_FRAME8k )
754 : {
755 651939 : assert( ( chan == 1 ) && "DFT stereo: 8kHz analysis only for residual coding" );
756 651939 : trigo = hStereoDft->dft_trigo_8k;
757 651939 : trigo_step = STEREO_DFT_TRIGO_SRATE_8k_STEP * STEREO_DFT_TRIGO_DEC_STEP;
758 651939 : win_right = hStereoDft->win32ms_8k;
759 651939 : win_left = hStereoDft->win32ms_8k;
760 651939 : win2 = hStereoDft->win232ms_8k;
761 651939 : mem = hCPE->input_mem[chan];
762 : }
763 : else
764 : {
765 0 : IVAS_ERROR( IVAS_ERR_INTERNAL_FATAL, "Error in DFT stereo: sampling rate not supported" );
766 0 : mem = NULL; /* to avoid compilation warning */
767 0 : trigo = NULL; /* to avoid compilation warning */
768 0 : trigo_step = -1; /* to avoid compilation warning */
769 0 : win_right = NULL; /* to avoid compilation warning */
770 0 : win_left = NULL; /* to avoid compilation warning */
771 0 : win2 = NULL; /* to avoid compilation warning */
772 : }
773 :
774 7579677 : inputFs = input_frame * FRAMES_PER_SEC;
775 7579677 : delay_dec = NS2SA( inputFs, STEREO_DFT32MS_OVL_NS );
776 7579677 : zp = NS2SA( inputFs, STEREO_DFT32MS_ZP_NS );
777 7579677 : ovl = NS2SA( inputFs, STEREO_DFT32MS_OVL_NS );
778 : #ifdef DEBUG_MODE_DFT
779 : N = NS2SA( inputFs, STEREO_DFT32MS_HOP_NS );
780 : #endif
781 7579677 : NFFT = NS2SA( inputFs, STEREO_DFT32MS_N_NS );
782 7579677 : fac = (float) ( hStereoDft->NFFT ) / (float) ( NFFT );
783 7579677 : ovl2 = NS2SA( inputFs, STEREO_DFT32MS_OVL2_NS );
784 :
785 : /* Offset for the time buffers */
786 7579677 : assert( ( delay >= -NS2SA( input_frame * FRAMES_PER_SEC, STEREO_DFT_DELAY_DEC_BWE_NS + STEREO_DFT_OVL_NS / 2 ) ) && ( delay <= NS2SA( input_frame * FRAMES_PER_SEC, STEREO_DFT_OVL_NS ) ) );
787 7579677 : mem_size = delay_dec + delay;
788 :
789 : /* Update buffers */
790 7579677 : mvr2r( mem, input_buff, mem_size );
791 7579677 : mvr2r( input, input_buff + mem_size, input_frame );
792 7579677 : mvr2r( input_buff + input_frame, mem, mem_size );
793 7579677 : pInput_buff = input_buff;
794 :
795 7579677 : if ( hCPE->nchan_out == 1 && hCPE->hStereoDft->hConfig->res_cod_mode == STEREO_DFT_RES_COD_OFF )
796 : {
797 1843248 : pop_wmops();
798 1843248 : return;
799 : }
800 :
801 : #ifdef DEBUG_MODE_DFT
802 : {
803 : int16_t tmp[L_FRAME48k];
804 : char file_name[50] = { 0 };
805 : #ifdef DEBUG_STEREO_DFT_NOCORE
806 : if ( ana_type == DFT_STEREO_DEC_ANA_NOCORE && delay == 0 )
807 : {
808 : sprintf( file_name, "./res/stereo_dft_enc_M_S_%d_c%d_b0.pcm", input_frame * FRAMES_PER_SEC, chan );
809 : dbgread( tmp, sizeof( int16_t ), 2 * N, file_name );
810 : for ( i = 0; i < input_frame; i++ )
811 : {
812 : pInput_buff[mem_size + i] = (float) ( tmp[i] );
813 : }
814 : mvr2r( input_buff + input_frame, mem, mem_size );
815 : }
816 : #endif
817 : offset = 0;
818 : pInput = pInput_buff + offset;
819 : for ( i = 0; i < 2 * N; i++ )
820 : {
821 : tmp[i] = (int16_t) ( pInput[i] + 0.5f );
822 : }
823 : if ( ana_type != DFT_STEREO_DEC_ANA_BPF )
824 : {
825 : sprintf( file_name, "./res/stereo_dft_dec_M_S_c%d_%d.pcm", input_frame * FRAMES_PER_SEC, chan );
826 : }
827 : else
828 : {
829 : sprintf( file_name, "./res/stereo_dft_dec_BPF_c%d_%d.pcm", input_frame * FRAMES_PER_SEC, chan );
830 : }
831 : dbgwrite( tmp, sizeof( int16_t ), 2 * N, 1, file_name );
832 : }
833 : #endif
834 :
835 : /*-----------------------------------------------------------------*
836 : * DFT Analysis: loop over frame
837 : *-----------------------------------------------------------------*/
838 :
839 5736429 : assert( k_offset <= STEREO_DFT_NBDIV );
840 :
841 606169221 : for ( i = 0; i < NFFT / 4; i++ )
842 : {
843 600432792 : trigo_dec[i] = trigo[i * trigo_step];
844 600432792 : trigo_dec[NFFT / 2 - i] = trigo[i * trigo_step];
845 : }
846 5736429 : trigo_dec[NFFT / 4] = trigo[NFFT / 4 * trigo_step];
847 :
848 14340147 : for ( k = 0; k < STEREO_DFT_NBDIV - k_offset; k++ )
849 : {
850 8603718 : set_f( DFT, 0, STEREO_DFT32MS_N_MAX );
851 8603718 : if ( k == 0 )
852 : {
853 4331799 : offset = 0;
854 : }
855 : else
856 : {
857 : /* If OVL2 = OVL offset = 10ms */
858 4271919 : offset = NS2SA( inputFs, STEREO_DFT32MS_WIN_CENTER_NS - STEREO_DFT32MS_OVL2_NS / 2 );
859 : }
860 :
861 8603718 : pInput = pInput_buff + offset;
862 8603718 : pDFT_out = out_DFT[chan] + k * STEREO_DFT32MS_N_MAX;
863 :
864 : /*Forwards FFT: L and R*/
865 : /* Zero Padding & Flat Portion */
866 8603718 : mvr2r( pInput, DFT + zp, NFFT - 2 * zp );
867 :
868 : /* Overlapping portions */
869 8603718 : if ( k == 0 )
870 : {
871 274241514 : for ( i = 0; i < ovl; i++ )
872 : {
873 269909715 : DFT[i + zp] *= win_left[STEREO_DFT32MS_STEP * i];
874 : }
875 814060944 : for ( i = 0; i < ovl2; i++ )
876 : {
877 809729145 : DFT[NFFT - zp - 1 - i] *= win2[i];
878 : }
879 : }
880 : else
881 : {
882 798963774 : for ( i = 0; i < ovl2; i++ )
883 : {
884 794691855 : DFT[i + zp] *= win2[i];
885 : }
886 269169204 : for ( i = 0; i < ovl; i++ )
887 : {
888 264897285 : DFT[NFFT - zp - i - 1] *= win_right[STEREO_DFT32MS_STEP * i];
889 : }
890 : }
891 :
892 8603718 : rfft( DFT, trigo_dec, NFFT, -1 );
893 :
894 : /*Resampling: filtering+scaling*/
895 8603718 : if ( ana_type == DFT_STEREO_DEC_ANA_FB || ana_type == DFT_STEREO_DEC_ANA_LB || ana_type == DFT_STEREO_DEC_ANA_NOCORE )
896 : {
897 7074876 : pDFT_out[0] = DFT[0] * fac; /*DC*/
898 7074876 : if ( NFFT == hStereoDft->NFFT ) /*Nyquist*/
899 : {
900 2602920 : pDFT_out[1] = DFT[1] * fac;
901 : }
902 : else
903 : {
904 4471956 : pDFT_out[1] = 0.f;
905 : }
906 2948589060 : for ( i = 2; i < NFFT; i++ )
907 : {
908 2941514184 : pDFT_out[i] = DFT[i] * fac;
909 : }
910 2085587580 : for ( i = NFFT; i < hStereoDft->NFFT; i++ )
911 : {
912 2078512704 : pDFT_out[i] = 0.f;
913 : }
914 : }
915 1528842 : else if ( ana_type == DFT_STEREO_DEC_ANA_BPF )
916 : {
917 1468536 : pDFT_out[0] -= DFT[0] * fac * dft_bpf_weights[0];
918 :
919 58741440 : for ( i = 1; i < STEREO_DFT_BPF_SIZE; i++ )
920 : {
921 57272904 : pDFT_out[2 * i] -= DFT[2 * i] * fac * dft_bpf_weights[i];
922 57272904 : pDFT_out[2 * i + 1] -= DFT[2 * i + 1] * fac * dft_bpf_weights[i];
923 : }
924 : }
925 60306 : else if ( ana_type == DFT_STEREO_DEC_ANA_HB_ADD )
926 : {
927 5748 : NFFT_core = NS2SA( hCPE->hCoreCoder[0]->L_frame * FRAMES_PER_SEC, STEREO_DFT32MS_N_NS );
928 :
929 3157812 : for ( i = NFFT_core; i < NFFT; i++ )
930 : {
931 3152064 : pDFT_out[i] += DFT[i] * fac;
932 : }
933 : }
934 : else
935 : {
936 54558 : pDFT_out[0] += DFT[0] * fac; /*DC*/
937 54558 : if ( NFFT == hStereoDft->NFFT ) /*Nyquist*/
938 : {
939 27645 : pDFT_out[1] += DFT[1] * fac;
940 : }
941 27484194 : for ( i = 2; i < NFFT; i++ )
942 : {
943 27429636 : pDFT_out[i] += DFT[i] * fac;
944 : }
945 : }
946 : }
947 :
948 5736429 : pop_wmops();
949 5736429 : return;
950 : }
951 :
952 : /*-------------------------------------------------------------------------
953 : * stereo_dft_dec_synthesize()
954 : *
955 : * Inverse DFT on a 20ms frame
956 : *-------------------------------------------------------------------------*/
957 :
958 3418857 : void stereo_dft_dec_synthesize(
959 : CPE_DEC_HANDLE hCPE, /* i/o: CPE decoder structure */
960 : float DFT[CPE_CHANNELS][STEREO_DFT_BUF_MAX], /* i : DFT buffers */
961 : const int16_t chan, /* i : channel number */
962 : float output[L_FRAME48k], /* o : output synthesis signal */
963 : const int16_t output_frame /* i : output frame length */
964 : )
965 : {
966 : int16_t i, k;
967 : int16_t offset;
968 : STEREO_DFT_DEC_DATA_HANDLE hStereoDft;
969 : float *p_DFT;
970 : const float *win, *win2;
971 : float trigo_dec[STEREO_DFT32MS_N_MAX / 2 + 1];
972 : int16_t trigo_step;
973 : int16_t ovl, zp, NFFT;
974 : int32_t outputFs;
975 : int16_t ovl2, flat_portion_end;
976 : float ola_buff[STEREO_DFT32MS_OVL2_MAX];
977 : int16_t moffset;
978 3418857 : push_wmops( "DFT_synthesis" );
979 :
980 : /*-----------------------------------------------------------------*
981 : * Initialization
982 : *-----------------------------------------------------------------*/
983 :
984 3418857 : hStereoDft = hCPE->hStereoDft;
985 :
986 3418857 : outputFs = output_frame * FRAMES_PER_SEC;
987 :
988 3418857 : zp = NS2SA( outputFs, STEREO_DFT32MS_ZP_NS );
989 3418857 : ovl = NS2SA( outputFs, STEREO_DFT32MS_OVL_NS );
990 3418857 : win = hStereoDft->win32ms;
991 3418857 : NFFT = NS2SA( outputFs, STEREO_DFT32MS_N_NS );
992 3418857 : ovl2 = NS2SA( outputFs, STEREO_DFT32MS_OVL2_NS );
993 3418857 : flat_portion_end = NS2SA( outputFs, STEREO_DFT32MS_WIN_CENTER_NS - STEREO_DFT32MS_OVL2_NS / 2 );
994 3418857 : win2 = hStereoDft->win232ms;
995 :
996 3418857 : p_DFT = DFT[chan];
997 3418857 : set_f( output, 0, NS2SA( outputFs, FRAME_SIZE_NS ) );
998 :
999 : /* deactivating the spectrum scrambling on active speech */
1000 3418857 : if ( ( chan == 0 && hCPE->hCoreCoder[0]->last_coder_type > UNVOICED ) || hCPE->last_element_mode == IVAS_CPE_MDCT || hCPE->last_element_mode < IVAS_CPE_DFT )
1001 : {
1002 1923462 : hCPE->stereo_switching_counter = 10;
1003 : }
1004 :
1005 3418857 : if ( hCPE->stereo_switching_counter == 0 )
1006 : {
1007 : /* Set the level of dispersion */
1008 111 : hCPE->NbFrameMod = (int16_t) ( 12.0f * max( -0.1f, min( 0.4, hCPE->lt_es_em ) ) + 1.2f + 0.5f ); /* -0.1: -0.4 ; -0.1 -> 0, 0.4 -> 6*/
1009 : }
1010 3418857 : moffset = max( 0, 6 - hCPE->NbFrameMod );
1011 :
1012 : /*-----------------------------------------------------------------*
1013 : * Synthesis
1014 : *-----------------------------------------------------------------*/
1015 :
1016 3418857 : trigo_step = hStereoDft->dft_trigo_step * STEREO_DFT_TRIGO_DEC_STEP;
1017 607761417 : for ( i = 0; i < NFFT / 4; i++ )
1018 : {
1019 604342560 : trigo_dec[i] = hStereoDft->dft_trigo[i * trigo_step];
1020 604342560 : trigo_dec[NFFT / 2 - i] = hStereoDft->dft_trigo[i * trigo_step];
1021 : }
1022 3418857 : trigo_dec[NFFT / 4] = hStereoDft->dft_trigo[NFFT / 4 * trigo_step];
1023 :
1024 10256571 : for ( k = 0; k < STEREO_DFT_NBDIV; k++ )
1025 : {
1026 : /* scrambling the spectrum */
1027 6837714 : if ( hCPE->stereo_switching_counter <= 6 && chan == 1 && ( hCPE->lt_es_em > -0.4f || hCPE->NbFrameMod > 4 ) )
1028 : {
1029 3211050 : for ( i = 3; i < NFFT - moffset - 1; i++ )
1030 : {
1031 3207516 : p_DFT[i] = -p_DFT[i + moffset + 1];
1032 : }
1033 : }
1034 6834180 : else if ( hCPE->stereo_switching_counter < 7 && ( hCPE->lt_es_em > 0.2f || hCPE->NbFrameMod > 4 ) )
1035 : {
1036 3180516 : for ( i = 16 - hCPE->NbFrameMod; i < NFFT - moffset - 1; i++ )
1037 : {
1038 3177000 : p_DFT[i - 2] = -p_DFT[i + moffset + 1];
1039 : }
1040 : }
1041 :
1042 : /*IFFT*/
1043 6837714 : rfft( p_DFT, trigo_dec, NFFT, +1 );
1044 :
1045 6837714 : if ( k == 0 )
1046 : {
1047 3418857 : offset = 0;
1048 :
1049 : /* Left OLA - 3.125ms */
1050 381132957 : for ( i = 0; i < ovl; i++ )
1051 : {
1052 377714100 : output[offset + i] = hCPE->output_mem[chan][i] + p_DFT[zp + i] * win[STEREO_DFT32MS_STEP * i];
1053 : }
1054 : /* Flat Portion */
1055 456675777 : for ( i = ovl; i < flat_portion_end; i++ )
1056 : {
1057 453256920 : output[offset + i] = p_DFT[zp + i];
1058 : }
1059 : /* Right OLA */
1060 1136561157 : for ( i = 0; i < ovl2; i++ )
1061 : {
1062 1133142300 : ola_buff[i] = win2[ovl2 - 1 - i] * p_DFT[NFFT - zp - ovl2 + i];
1063 : }
1064 : }
1065 : else
1066 : {
1067 : /* If OVL2 = OVL offset = 10ms */
1068 3418857 : offset = flat_portion_end;
1069 :
1070 : /* Left OLA */
1071 1136561157 : for ( i = 0; i < ovl2; i++ )
1072 : {
1073 1133142300 : output[offset + i] = ola_buff[i] + p_DFT[zp + i] * win2[i];
1074 : }
1075 : /* Flat Portion */
1076 456675777 : for ( i = ovl2; i < NFFT - 2 * zp - ovl; i++ )
1077 : {
1078 453256920 : output[offset + i] = p_DFT[zp + i];
1079 : }
1080 : /* Right OLA - 3.125ms */
1081 381132957 : for ( i = 0; i < ovl; i++ )
1082 : {
1083 377714100 : hCPE->output_mem[chan][i] = win[STEREO_DFT32MS_STEP * ( ovl - 1 - i )] * p_DFT[NFFT - zp - ovl + i];
1084 : }
1085 : }
1086 :
1087 6837714 : p_DFT += STEREO_DFT32MS_N_MAX;
1088 : }
1089 :
1090 : #ifdef DEBUG_MODE_DFT
1091 : {
1092 : int16_t tmp[1024];
1093 : char file_name[50] = { 0 };
1094 :
1095 : for ( i = 0; i < output_frame; i++ )
1096 : {
1097 : tmp[i] = (int16_t) ( output[i] + 0.5f );
1098 : }
1099 : sprintf( file_name, "./res/stereo_dft_ch%d_output.pcm", chan );
1100 : dbgwrite( tmp, sizeof( int16_t ), output_frame, 1, file_name );
1101 : }
1102 : #endif
1103 :
1104 3418857 : pop_wmops();
1105 3418857 : return;
1106 : }
1107 :
1108 :
1109 : /*-------------------------------------------------------------------------
1110 : * stereo_dft_dec()
1111 : *
1112 : * DFT-based stereo main processing function
1113 : *-------------------------------------------------------------------------*/
1114 :
1115 1624011 : void stereo_dft_dec(
1116 : STEREO_DFT_DEC_DATA_HANDLE hStereoDft, /* i/o: decoder DFT stereo handle */
1117 : Decoder_State *st0, /* i/o: decoder state structure */
1118 : float DFT[CPE_CHANNELS][STEREO_DFT_BUF_MAX], /* i/o: DFT buffers */
1119 : float *input_mem, /* i/o: mem of buffer DFT analysis */
1120 : STEREO_CNG_DEC_HANDLE hStereoCng, /* i/o: Stereo CNG data structure */
1121 : const int16_t sba_dirac_stereo_flag, /* i : signal stereo output for SBA DirAC */
1122 : const int16_t sba_mono_flag, /* i : signal mono output for SBA DirAC */
1123 : ivas_spar_md_dec_state_t *hMdDec, /* i : SPAR MD handle for upmixing */
1124 : const int16_t cross_fade_start_offset, /* i : SPAR mixer delay compensation */
1125 : const int32_t output_Fs, /* i : Fs for delay calculation */
1126 : const int16_t nchan_transport, /* i : number of transpor channels */
1127 : const int16_t num_md_sub_frames /* i : number of MD subframes */
1128 : )
1129 : {
1130 : int16_t i, k, b, N_div, stop;
1131 : float DFT_L[STEREO_DFT32MS_N_MAX];
1132 : float DFT_R[STEREO_DFT32MS_N_MAX];
1133 : float DFT_PRED_RES[STEREO_DFT32MS_N_32k];
1134 : float *pDFT_DMX;
1135 : float *pDFT_DMX1;
1136 : float *pDFT_RES;
1137 : float g, tmp;
1138 : float *pPredGain;
1139 : float *pSideGain;
1140 : float c0, s0;
1141 : int16_t k_offset;
1142 : float *pgIpd;
1143 : int16_t NFFT_inner;
1144 : float gamma;
1145 : float samp_ratio;
1146 : int16_t prev_bfi;
1147 : float dmx_nrg;
1148 : int16_t idx_k0, idx_k1;
1149 : int16_t output_frame;
1150 : int16_t plocs[STEREO_DFT_RES_N_PEAKS_MAX];
1151 : int16_t num_plocs;
1152 : float plocsi[STEREO_DFT_RES_N_PEAKS_MAX];
1153 : float ftmp, N1, N2, coh;
1154 : float lev1, lev2, cna_level, scale_fact0, scale_fact, *ptr_per;
1155 1624011 : HANDLE_FD_CNG_DEC hFdCngDec = st0->hFdCngDec;
1156 1624011 : HANDLE_FD_CNG_COM hFdCngCom = hFdCngDec->hFdCngCom;
1157 1624011 : int16_t *cna_seed = &( hFdCngCom->seed );
1158 : float DFT_W, DFT_Y;
1159 :
1160 1624011 : output_frame = (int16_t) ( st0->output_Fs / FRAMES_PER_SEC );
1161 :
1162 : /*------------------------------------------------------------------*
1163 : * Initialization
1164 : *-----------------------------------------------------------------*/
1165 :
1166 1624011 : samp_ratio = (float) st0->sr_core / (float) st0->output_Fs;
1167 :
1168 1624011 : stop = STEREO_DFT32MS_N_32k / 2;
1169 :
1170 : /* Analyze nature of current frame */
1171 1532976 : hStereoDft->trans = ( ( ( st0->clas_dec == ONSET ) || ( st0->clas_dec == SIN_ONSET ) || ( st0->clas_dec == UNVOICED_CLAS ) || ( st0->clas_dec == UNVOICED_TRANSITION ) ) || ( st0->stab_fac <= 0.25f ) ) ||
1172 3156987 : ( st0->core == TCX_20_CORE && ( ( st0->hTcxCfg->tcx_last_overlap_mode == MIN_OVERLAP ) || ( st0->hTcxCfg->tcx_last_overlap_mode == HALF_OVERLAP ) ) ) || ( st0->core == TCX_10_CORE );
1173 :
1174 : #ifdef DEBUG_MODE_DFT
1175 : {
1176 : int16_t tmps;
1177 : int16_t tmp_output_frame = (int16_t) ( st0->output_Fs / FRAMES_PER_SEC );
1178 : dbgwrite( &( hStereoDft->attackPresent ), sizeof( int16_t ), 1, tmp_output_frame, "res/stereo_attack.pcm" );
1179 : dbgwrite( &( hStereoDft->trans ), sizeof( int16_t ), 1, tmp_output_frame, "res/stereo_trans.pcm" );
1180 : tmps = (int16_t) ( 100.f * ( st0->stab_fac ) + 0.5f );
1181 : dbgwrite( &tmps, sizeof( int16_t ), 1, tmp_output_frame, "res/stereo_stab.pcm" );
1182 : }
1183 : #endif
1184 :
1185 : /* Initialization */
1186 1624011 : k_offset = 1;
1187 1624011 : N_div = STEREO_DFT_NBDIV;
1188 1624011 : prev_bfi = st0->prev_old_bfi; /* The core decoding is already completed here and the prev_bfi has been updated for the next frame.
1189 : The prev_old_bfi still holds the prev_bfi for the current frame. */
1190 : /* make sure number of bands corresponds to output bwidth in case it is lower than parameter bwidth */
1191 1624011 : if ( output_frame < inner_frame_tbl[st0->bwidth] && !sba_dirac_stereo_flag )
1192 : {
1193 207432 : hStereoDft->nbands = stereo_dft_band_config( hStereoDft->band_limits, hStereoDft->band_res[k_offset], hStereoDft->NFFT, DEC );
1194 : }
1195 :
1196 1624011 : if ( !st0->bfi )
1197 : {
1198 : /* Smoothing for the current frame */
1199 1590789 : if ( sba_dirac_stereo_flag )
1200 : {
1201 296937 : ivas_sba_dirac_stereo_smooth_parameters( hStereoDft, hMdDec, cross_fade_start_offset, output_Fs, num_md_sub_frames );
1202 : }
1203 : else
1204 : {
1205 1293852 : stereo_dft_dec_smooth_parameters( hStereoDft, hStereoCng->prev_sid_nodata, hStereoCng->active_frame_counter, st0->element_brate );
1206 : }
1207 : }
1208 :
1209 1624011 : dmx_nrg = 0.0f;
1210 1624011 : if ( prev_bfi )
1211 : {
1212 33066 : dmx_nrg = stereo_dft_dmx_swb_nrg( DFT[0], DFT[0] + STEREO_DFT32MS_N_MAX, min( hStereoDft->NFFT, STEREO_DFT32MS_N_32k ) );
1213 : }
1214 :
1215 : #ifdef DEBUG_MODE_DFT
1216 : dbgwrite( hStereoDft->res_pred_gain + STEREO_DFT_BAND_MAX, sizeof( float ), hStereoDft->nbands, 1, "./res/stereo_dft_dec_gainPred.pcm" );
1217 : #endif
1218 :
1219 : #ifdef DEBUG_PRINT
1220 : printf( "\nframe: %d\n", frame );
1221 : #endif
1222 4872033 : for ( k = 0; k < N_div; k++ )
1223 : {
1224 3248022 : pDFT_DMX = DFT[0] + k * STEREO_DFT32MS_N_MAX;
1225 3248022 : pDFT_RES = DFT[1] + k * STEREO_DFT32MS_N_MAX;
1226 3248022 : pDFT_DMX1 = 0;
1227 3248022 : if ( nchan_transport > 1 )
1228 : {
1229 310668 : pDFT_DMX1 = DFT[1] + k * STEREO_DFT32MS_N_MAX;
1230 : }
1231 :
1232 : /*Apply Stereo*/
1233 3248022 : if ( hStereoDft->hConfig->dmx_active )
1234 : {
1235 3248022 : g = 1.f;
1236 3248022 : c0 = 1.f;
1237 3248022 : s0 = 0.f;
1238 :
1239 : /* since delay is just 3.125ms, the parameters received are used for the second window */
1240 3248022 : pSideGain = hStereoDft->side_gain + ( k + k_offset ) * STEREO_DFT_BAND_MAX;
1241 3248022 : pgIpd = hStereoDft->gipd + ( k + k_offset );
1242 3248022 : pPredGain = hStereoDft->res_pred_gain + ( k + k_offset ) * STEREO_DFT_BAND_MAX;
1243 :
1244 : #ifdef DEBUG_PRINT
1245 : if ( k == 0 )
1246 : {
1247 : printf( "Window0\n" );
1248 : }
1249 : else
1250 : {
1251 : printf( "Window1\n" );
1252 : }
1253 : for ( b = 0; b < hStereoDft->nbands; b++ )
1254 : printf( "%.6f ", pSideGain[b] );
1255 : printf( "\n" );
1256 : for ( b = 0; b < hStereoDft->nbands; b++ )
1257 : printf( "%.6f ", pPredGain[b] );
1258 : printf( "\n" );
1259 : #endif
1260 :
1261 : /* Use coarse band partition in inactive frames */
1262 3248022 : if ( hStereoDft->frame_sid_nodata && !sba_dirac_stereo_flag )
1263 : {
1264 84942 : NFFT_inner = STEREO_DFT32MS_N_MAX * inner_frame_tbl[st0->bwidth] / L_FRAME48k;
1265 84942 : hStereoDft->nbands = stereo_dft_band_config( hStereoDft->band_limits, 2, NFFT_inner, DEC );
1266 : }
1267 :
1268 :
1269 3248022 : if ( st0->bfi )
1270 : {
1271 66444 : hStereoDft->past_DMX_pos = ( hStereoDft->past_DMX_pos + STEREO_DFT_PAST_MAX - 1 ) % STEREO_DFT_PAST_MAX;
1272 : }
1273 :
1274 3248022 : if ( !( sba_dirac_stereo_flag && nchan_transport >= 2 ) )
1275 : {
1276 2937354 : stereo_dft_generate_res_pred( hStereoDft, samp_ratio, pDFT_DMX, DFT_PRED_RES, pPredGain, k, DFT[1] + k * STEREO_DFT32MS_N_MAX, &stop, st0->bfi );
1277 : }
1278 :
1279 3248022 : if ( hStereoDft->res_cod_band_max > 0 )
1280 : {
1281 950592 : if ( !st0->bfi )
1282 : {
1283 923820 : if ( k == 1 )
1284 : {
1285 461910 : mvr2r( pDFT_RES, hStereoDft->res_mem, 2 * hStereoDft->band_limits[hStereoDft->res_cod_band_max] );
1286 461910 : hStereoDft->time_offs = 0;
1287 : }
1288 : }
1289 : else
1290 : {
1291 26772 : stereo_dft_res_ecu( hStereoDft, pDFT_RES, DFT_PRED_RES, k, output_frame, prev_bfi, dmx_nrg, &num_plocs, plocs, plocsi, input_mem );
1292 : }
1293 : }
1294 :
1295 : #ifdef DEBUGGING
1296 : if ( dbgflag( "write_res" ) )
1297 : {
1298 : dbgwrite( pDFT_RES, sizeof( float ), 2 * hStereoDft->band_limits[hStereoDft->res_cod_band_max], 1, "dec_res.float" );
1299 : }
1300 :
1301 : if ( dbgflag( "read_res" ) )
1302 : {
1303 : dbgread( pDFT_RES, sizeof( float ), 2 * hStereoDft->band_limits[hStereoDft->res_cod_band_max], "dec_res.float" );
1304 : }
1305 : #endif
1306 : /* Apply active DMX */
1307 : /* pDFT_RES is used for the second channel in inactive frames */
1308 3248022 : if ( hStereoDft->frame_sid_nodata && !sba_dirac_stereo_flag )
1309 : {
1310 84942 : DFT_L[0] = pDFT_DMX[0];
1311 84942 : DFT_R[0] = pDFT_RES[0];
1312 : }
1313 : else
1314 : {
1315 3163080 : DFT_L[0] = pDFT_DMX[0];
1316 3163080 : DFT_R[0] = pDFT_DMX[0];
1317 : }
1318 :
1319 3248022 : if ( hStereoDft->frame_sid_nodata || st0->VAD == 0 )
1320 : {
1321 538452 : hFdCngDec->cna_nbands = 0;
1322 : }
1323 :
1324 34930398 : for ( b = 0; b < hStereoDft->nbands; b++ )
1325 : {
1326 31682376 : g = pSideGain[b];
1327 31682376 : if ( hStereoDft->frame_sid_nodata && !sba_dirac_stereo_flag )
1328 : {
1329 497496 : g = hStereoDft->g_state[b];
1330 : }
1331 :
1332 : /* store side gains from inactive frames for later use by the stereo CNA */
1333 31682376 : if ( hStereoDft->band_limits[b] < L_FRAME16k && ( hStereoDft->frame_sid_nodata || st0->VAD == 0 ) )
1334 : {
1335 5224476 : hFdCngDec->cna_nbands = b + 1;
1336 5224476 : hFdCngDec->cna_band_limits[b] = hStereoDft->band_limits[b];
1337 5224476 : hFdCngDec->cna_g_state[b] = g;
1338 : }
1339 :
1340 : #ifdef DEBUG_MODE_DFT
1341 : if ( b < hStereoDft->res_cod_band_max )
1342 : {
1343 : dbgwrite( &g, sizeof( float ), 1, 1, "./res/stereo_dft_dec_g.pcm" );
1344 : }
1345 : #endif
1346 : /* No residual coding in inactive frames, instead pDFT_RES is used for the second channel */
1347 31682376 : if ( b >= hStereoDft->res_cod_band_max && !hStereoDft->frame_sid_nodata && !( sba_dirac_stereo_flag && hMdDec ) )
1348 : {
1349 : /*filter non-coded frequencies. It removes some MDCT frequency aliasing*/
1350 826425000 : for ( i = hStereoDft->band_limits[b]; i < hStereoDft->band_limits[b + 1]; i++ )
1351 : {
1352 805654674 : pDFT_RES[2 * i] = 0.f;
1353 805654674 : pDFT_RES[2 * i + 1] = 0.f;
1354 : }
1355 : }
1356 :
1357 31682376 : if ( hStereoDft->frame_sid_nodata && !sba_dirac_stereo_flag )
1358 : {
1359 : /* Low pass filter coherence */
1360 : /* store coherence from inactive frames for later use by the stereo CNA */
1361 497496 : hFdCngDec->cna_cm[b] = hStereoCng->cm[b];
1362 :
1363 : /* Calculate gamma */
1364 497496 : if ( hStereoCng->cm[b] < 0.9f )
1365 : {
1366 497340 : gamma = hStereoCng->cm[b];
1367 497340 : gamma = gamma / ( 1 - gamma );
1368 497340 : gamma = sqrtf( gamma + 1 - g * g ) - sqrtf( gamma );
1369 : }
1370 : else
1371 : {
1372 156 : gamma = 0;
1373 : }
1374 :
1375 25649034 : for ( i = hStereoDft->band_limits[b]; i < hStereoDft->band_limits[b + 1]; i++ )
1376 : {
1377 : /* Create L and R signals with the correct coherence by mixing channel 0 (pDFT_DMX) and channel 1 (pDFT_RES) */
1378 25151538 : DFT_L[2 * i] = ( 1 + g ) * pDFT_DMX[2 * i] + gamma * pDFT_RES[2 * i];
1379 25151538 : DFT_R[2 * i] = ( 1 - g ) * pDFT_DMX[2 * i] - gamma * pDFT_RES[2 * i];
1380 :
1381 25151538 : DFT_L[2 * i + 1] = ( 1 + g ) * pDFT_DMX[2 * i + 1] + gamma * pDFT_RES[2 * i + 1];
1382 25151538 : DFT_R[2 * i + 1] = ( 1 - g ) * pDFT_DMX[2 * i + 1] - gamma * pDFT_RES[2 * i + 1];
1383 : }
1384 :
1385 497496 : if ( pgIpd[0] != 0.f )
1386 : {
1387 : volatile float pgIpd_tmp;
1388 :
1389 105252 : pgIpd_tmp = pgIpd[0];
1390 105252 : c0 = cosf( pgIpd_tmp );
1391 105252 : s0 = sinf( pgIpd_tmp );
1392 5003742 : for ( i = hStereoDft->band_limits[b]; i < hStereoDft->band_limits[b + 1]; i++ )
1393 : {
1394 : /*rotate L*/
1395 4898490 : tmp = DFT_L[2 * i] * c0 - DFT_L[2 * i + 1] * s0;
1396 4898490 : DFT_L[2 * i + 1] = DFT_L[2 * i] * s0 + DFT_L[2 * i + 1] * c0;
1397 4898490 : DFT_L[2 * i] = tmp;
1398 : }
1399 : }
1400 : }
1401 31184880 : else if ( sba_dirac_stereo_flag && hMdDec )
1402 : {
1403 :
1404 5661594 : if ( nchan_transport == 1 )
1405 : {
1406 2112840 : if ( sba_mono_flag )
1407 : {
1408 750888 : if ( b == 0 )
1409 : {
1410 62574 : i = 0;
1411 :
1412 62574 : DFT_W = hStereoDft->mixer_mat_smooth[0][0][b + k * IVAS_MAX_NUM_BANDS] * pDFT_DMX[2 * i];
1413 62574 : DFT_L[2 * i] = DFT_W;
1414 62574 : DFT_R[2 * i] = 0.f;
1415 :
1416 62574 : DFT_W = hStereoDft->mixer_mat_smooth[0][0][b + k * IVAS_MAX_NUM_BANDS] * pDFT_DMX[2 * i + 1];
1417 62574 : DFT_L[2 * i + 1] = DFT_W;
1418 62574 : DFT_R[2 * i + 1] = 0.f;
1419 : }
1420 16680762 : for ( i = hStereoDft->band_limits[b]; i < min( stop, hStereoDft->band_limits[b + 1] ); i++ )
1421 : {
1422 15929874 : DFT_W = hStereoDft->mixer_mat_smooth[0][0][b + k * IVAS_MAX_NUM_BANDS] * pDFT_DMX[2 * i] + ( hStereoDft->mixer_mat_smooth[0][1][b + k * IVAS_MAX_NUM_BANDS] + hStereoDft->mixer_mat_smooth[0][2][b + k * IVAS_MAX_NUM_BANDS] + hStereoDft->mixer_mat_smooth[0][3][b + k * IVAS_MAX_NUM_BANDS] ) * DFT_PRED_RES[2 * i];
1423 15929874 : DFT_L[2 * i] = DFT_W;
1424 15929874 : DFT_R[2 * i] = 0.f;
1425 :
1426 15929874 : DFT_W = hStereoDft->mixer_mat_smooth[0][0][b + k * IVAS_MAX_NUM_BANDS] * pDFT_DMX[2 * i + 1] + ( hStereoDft->mixer_mat_smooth[0][1][b + k * IVAS_MAX_NUM_BANDS] + hStereoDft->mixer_mat_smooth[0][2][b + k * IVAS_MAX_NUM_BANDS] + hStereoDft->mixer_mat_smooth[0][3][b + k * IVAS_MAX_NUM_BANDS] ) * DFT_PRED_RES[2 * i + 1];
1427 15929874 : DFT_L[2 * i + 1] = DFT_W;
1428 15929874 : DFT_R[2 * i + 1] = 0.f;
1429 : }
1430 14793960 : for ( ; i < hStereoDft->band_limits[b + 1]; i++ )
1431 : {
1432 14043072 : DFT_W = hStereoDft->mixer_mat_smooth[0][0][b + k * IVAS_MAX_NUM_BANDS] * pDFT_DMX[2 * i];
1433 14043072 : DFT_L[2 * i] = DFT_W;
1434 14043072 : DFT_R[2 * i] = 0.f;
1435 :
1436 14043072 : DFT_W = hStereoDft->mixer_mat_smooth[0][0][b + k * IVAS_MAX_NUM_BANDS] * pDFT_DMX[2 * i + 1];
1437 14043072 : DFT_L[2 * i + 1] = DFT_W;
1438 14043072 : DFT_R[2 * i + 1] = 0.f;
1439 : }
1440 : }
1441 : else
1442 : {
1443 1361952 : if ( b == 0 )
1444 : {
1445 122592 : i = 0;
1446 :
1447 122592 : DFT_W = hStereoDft->mixer_mat_smooth[0][0][b + k * IVAS_MAX_NUM_BANDS] * pDFT_DMX[2 * i];
1448 122592 : DFT_Y = hStereoDft->mixer_mat_smooth[1][0][b + k * IVAS_MAX_NUM_BANDS] * pDFT_DMX[2 * i];
1449 :
1450 122592 : DFT_L[2 * i] = DFT_W + DFT_Y;
1451 122592 : DFT_R[2 * i] = DFT_W - DFT_Y;
1452 :
1453 122592 : DFT_W = hStereoDft->mixer_mat_smooth[0][0][b + k * IVAS_MAX_NUM_BANDS] * pDFT_DMX[2 * i + 1];
1454 122592 : DFT_Y = hStereoDft->mixer_mat_smooth[1][0][b + k * IVAS_MAX_NUM_BANDS] * pDFT_DMX[2 * i + 1];
1455 :
1456 122592 : DFT_L[2 * i + 1] = DFT_W + DFT_Y;
1457 122592 : DFT_R[2 * i + 1] = DFT_W - DFT_Y;
1458 : }
1459 31738944 : for ( i = hStereoDft->band_limits[b]; i < min( stop, hStereoDft->band_limits[b + 1] ); i++ )
1460 : {
1461 30376992 : DFT_W = hStereoDft->mixer_mat_smooth[0][0][b + k * IVAS_MAX_NUM_BANDS] * pDFT_DMX[2 * i] + ( hStereoDft->mixer_mat_smooth[0][1][b + k * IVAS_MAX_NUM_BANDS] + hStereoDft->mixer_mat_smooth[0][2][b + k * IVAS_MAX_NUM_BANDS] + hStereoDft->mixer_mat_smooth[0][3][b + k * IVAS_MAX_NUM_BANDS] ) * DFT_PRED_RES[2 * i];
1462 30376992 : DFT_Y = hStereoDft->mixer_mat_smooth[1][0][b + k * IVAS_MAX_NUM_BANDS] * pDFT_DMX[2 * i] + ( hStereoDft->mixer_mat_smooth[1][1][b + k * IVAS_MAX_NUM_BANDS] + hStereoDft->mixer_mat_smooth[1][2][b + k * IVAS_MAX_NUM_BANDS] + hStereoDft->mixer_mat_smooth[1][3][b + k * IVAS_MAX_NUM_BANDS] ) * DFT_PRED_RES[2 * i];
1463 :
1464 30376992 : DFT_L[2 * i] = DFT_W + DFT_Y;
1465 30376992 : DFT_R[2 * i] = DFT_W - DFT_Y;
1466 :
1467 30376992 : DFT_W = hStereoDft->mixer_mat_smooth[0][0][b + k * IVAS_MAX_NUM_BANDS] * pDFT_DMX[2 * i + 1] + ( hStereoDft->mixer_mat_smooth[0][1][b + k * IVAS_MAX_NUM_BANDS] + hStereoDft->mixer_mat_smooth[0][2][b + k * IVAS_MAX_NUM_BANDS] + hStereoDft->mixer_mat_smooth[0][3][b + k * IVAS_MAX_NUM_BANDS] ) * DFT_PRED_RES[2 * i + 1];
1468 30376992 : DFT_Y = hStereoDft->mixer_mat_smooth[1][0][b + k * IVAS_MAX_NUM_BANDS] * pDFT_DMX[2 * i + 1] + ( hStereoDft->mixer_mat_smooth[1][1][b + k * IVAS_MAX_NUM_BANDS] + hStereoDft->mixer_mat_smooth[1][2][b + k * IVAS_MAX_NUM_BANDS] + hStereoDft->mixer_mat_smooth[1][3][b + k * IVAS_MAX_NUM_BANDS] ) * DFT_PRED_RES[2 * i + 1];
1469 :
1470 30376992 : DFT_L[2 * i + 1] = DFT_W + DFT_Y;
1471 30376992 : DFT_R[2 * i + 1] = DFT_W - DFT_Y;
1472 : }
1473 12242208 : for ( ; i < hStereoDft->band_limits[b + 1]; i++ )
1474 : {
1475 10880256 : DFT_W = hStereoDft->mixer_mat_smooth[0][0][b + k * IVAS_MAX_NUM_BANDS] * pDFT_DMX[2 * i];
1476 10880256 : DFT_Y = hStereoDft->mixer_mat_smooth[1][0][b + k * IVAS_MAX_NUM_BANDS] * pDFT_DMX[2 * i];
1477 :
1478 10880256 : DFT_L[2 * i] = DFT_W + DFT_Y;
1479 10880256 : DFT_R[2 * i] = DFT_W - DFT_Y;
1480 :
1481 10880256 : DFT_W = hStereoDft->mixer_mat_smooth[0][0][b + k * IVAS_MAX_NUM_BANDS] * pDFT_DMX[2 * i + 1];
1482 10880256 : DFT_Y = hStereoDft->mixer_mat_smooth[1][0][b + k * IVAS_MAX_NUM_BANDS] * pDFT_DMX[2 * i + 1];
1483 :
1484 10880256 : DFT_L[2 * i + 1] = DFT_W + DFT_Y;
1485 10880256 : DFT_R[2 * i + 1] = DFT_W - DFT_Y;
1486 : }
1487 : }
1488 : }
1489 3548754 : else if ( nchan_transport >= 2 )
1490 : {
1491 3548754 : if ( b == 0 )
1492 : {
1493 310668 : i = 0;
1494 :
1495 310668 : DFT_W = pDFT_DMX[2 * i];
1496 310668 : DFT_Y = hStereoDft->mixer_mat_smooth[1][0][b + k * IVAS_MAX_NUM_BANDS] * pDFT_DMX[2 * i] + pDFT_DMX1[2 * i];
1497 :
1498 310668 : DFT_L[2 * i] = DFT_W + DFT_Y;
1499 310668 : DFT_R[2 * i] = DFT_W - DFT_Y;
1500 :
1501 310668 : DFT_W = pDFT_DMX[2 * i + 1];
1502 310668 : DFT_Y = hStereoDft->mixer_mat_smooth[1][0][b + k * IVAS_MAX_NUM_BANDS] * pDFT_DMX[2 * i + 1] + pDFT_DMX1[2 * i + 1];
1503 :
1504 310668 : DFT_L[2 * i + 1] = DFT_W + DFT_Y;
1505 310668 : DFT_R[2 * i + 1] = DFT_W - DFT_Y;
1506 : }
1507 123676806 : for ( i = hStereoDft->band_limits[b]; i < hStereoDft->band_limits[b + 1]; i++ )
1508 : {
1509 120128052 : DFT_W = pDFT_DMX[2 * i];
1510 120128052 : DFT_Y = hStereoDft->mixer_mat_smooth[1][0][b + k * IVAS_MAX_NUM_BANDS] * pDFT_DMX[2 * i] + pDFT_DMX1[2 * i];
1511 :
1512 120128052 : DFT_L[2 * i] = DFT_W + DFT_Y;
1513 120128052 : DFT_R[2 * i] = DFT_W - DFT_Y;
1514 :
1515 120128052 : DFT_W = pDFT_DMX[2 * i + 1];
1516 120128052 : DFT_Y = hStereoDft->mixer_mat_smooth[1][0][b + k * IVAS_MAX_NUM_BANDS] * pDFT_DMX[2 * i + 1] + pDFT_DMX1[2 * i + 1];
1517 :
1518 120128052 : DFT_L[2 * i + 1] = DFT_W + DFT_Y;
1519 120128052 : DFT_R[2 * i + 1] = DFT_W - DFT_Y;
1520 : }
1521 : }
1522 : else
1523 : {
1524 : assert( "nhcan_transport must be 1 or 1!" );
1525 : }
1526 : }
1527 : else
1528 : {
1529 582342504 : for ( i = hStereoDft->band_limits[b]; i < min( stop, hStereoDft->band_limits[b + 1] ); i++ )
1530 : {
1531 556819218 : tmp = g * pDFT_DMX[2 * i] + pDFT_RES[2 * i] + DFT_PRED_RES[2 * i];
1532 :
1533 556819218 : DFT_L[2 * i] = pDFT_DMX[2 * i] + tmp;
1534 556819218 : DFT_R[2 * i] = pDFT_DMX[2 * i] - tmp;
1535 :
1536 556819218 : tmp = g * pDFT_DMX[2 * i + 1] + pDFT_RES[2 * i + 1] + DFT_PRED_RES[2 * i + 1];
1537 :
1538 556819218 : DFT_L[2 * i + 1] = pDFT_DMX[2 * i + 1] + tmp;
1539 556819218 : DFT_R[2 * i + 1] = pDFT_DMX[2 * i + 1] - tmp;
1540 :
1541 : #ifdef DEBUG_STEREO_DFT_OUTRESPRED
1542 : DFT_L[2 * i] = DFT_PRED_RES[2 * i];
1543 : DFT_R[2 * i] = -DFT_PRED_RES[2 * i];
1544 : DFT_L[2 * i + 1] = DFT_PRED_RES[2 * i + 1];
1545 : DFT_R[2 * i + 1] = -DFT_PRED_RES[2 * i + 1];
1546 : #endif /* DEBUG_STEREO_DFT_OUTRESPRED */
1547 : }
1548 :
1549 293370582 : for ( ; i < hStereoDft->band_limits[b + 1]; i++ )
1550 : {
1551 267847296 : tmp = g * pDFT_DMX[2 * i] + pDFT_RES[2 * i];
1552 :
1553 267847296 : DFT_L[2 * i] = pDFT_DMX[2 * i] + tmp;
1554 267847296 : DFT_R[2 * i] = pDFT_DMX[2 * i] - tmp;
1555 :
1556 267847296 : tmp = g * pDFT_DMX[2 * i + 1] + pDFT_RES[2 * i + 1];
1557 :
1558 267847296 : DFT_L[2 * i + 1] = pDFT_DMX[2 * i + 1] + tmp;
1559 267847296 : DFT_R[2 * i + 1] = pDFT_DMX[2 * i + 1] - tmp;
1560 :
1561 : #ifdef DEBUG_STEREO_DFT_OUTRESPRED
1562 : DFT_L[2 * i] = 0.f;
1563 : DFT_R[2 * i] = 0.f;
1564 : DFT_L[2 * i + 1] = 0.f;
1565 : DFT_R[2 * i + 1] = 0.f;
1566 : #endif /* DEBUG_STEREO_DFT_OUTRESPRED */
1567 : }
1568 :
1569 : /* Active Upmix */
1570 25523286 : if ( pgIpd[0] != 0.f )
1571 : {
1572 : volatile float pgIpd_tmp;
1573 :
1574 3665640 : pgIpd_tmp = pgIpd[0];
1575 3665640 : c0 = cosf( pgIpd_tmp );
1576 3665640 : s0 = sinf( pgIpd_tmp );
1577 117040587 : for ( i = hStereoDft->band_limits[b]; i < hStereoDft->band_limits[b + 1]; i++ )
1578 : {
1579 : /*rotate L*/
1580 113374947 : tmp = DFT_L[2 * i] * c0 - DFT_L[2 * i + 1] * s0;
1581 113374947 : DFT_L[2 * i + 1] = DFT_L[2 * i] * s0 + DFT_L[2 * i + 1] * c0;
1582 113374947 : DFT_L[2 * i] = tmp;
1583 : }
1584 : }
1585 : }
1586 : }
1587 :
1588 3248022 : if ( hStereoDft->frame_sid_nodata || st0->VAD == 0 )
1589 : {
1590 538452 : hFdCngDec->cna_band_limits[hFdCngDec->cna_nbands] = hStereoDft->band_limits[hFdCngDec->cna_nbands];
1591 : }
1592 :
1593 3248022 : if ( hStereoDft->frame_sid_nodata && !sba_dirac_stereo_flag )
1594 : {
1595 84942 : hStereoCng->first_SID = 0;
1596 84942 : hStereoCng->first_SID_after_TD = 0;
1597 : }
1598 :
1599 115852182 : for ( i = hStereoDft->band_limits[b]; i < hStereoDft->NFFT / 2; i++ )
1600 : {
1601 112604160 : DFT_L[2 * i] = 0.f;
1602 112604160 : DFT_L[2 * i + 1] = 0.f;
1603 112604160 : DFT_R[2 * i] = 0.f;
1604 112604160 : DFT_R[2 * i + 1] = 0.f;
1605 : }
1606 :
1607 : /*Nyquist Freq.*/
1608 3248022 : if ( hStereoDft->band_limits[b] == hStereoDft->NFFT / 2 )
1609 : {
1610 2596290 : DFT_L[1] = pDFT_DMX[1] + g * pDFT_DMX[1];
1611 2596290 : DFT_R[1] = pDFT_DMX[1] - g * pDFT_DMX[1];
1612 2596290 : DFT_L[1] *= INV_SQRT_2;
1613 2596290 : DFT_R[1] *= INV_SQRT_2;
1614 : }
1615 : else
1616 : {
1617 651732 : DFT_L[1] = 0.f;
1618 651732 : DFT_R[1] = 0.f;
1619 : }
1620 : }
1621 : else
1622 : {
1623 0 : pPredGain = NULL; /* to avoid compilation warnings */
1624 0 : pSideGain = NULL;
1625 :
1626 : #ifndef DEBUG_STEREO_DFT_NOSTEREO
1627 : /* Dummy upmix-> mono binauralization */
1628 0 : for ( i = 0; i < hStereoDft->NFFT; i++ )
1629 : {
1630 0 : DFT_L[i] = ( pDFT_DMX[i] + pDFT_RES[i] );
1631 0 : DFT_R[i] = ( pDFT_DMX[i] - pDFT_RES[i] );
1632 : }
1633 : #else
1634 : /*Copy DMX to Left channel and reset Right channel*/
1635 : mvr2r( pDFT_DMX, DFT_L, hStereoDft->NFFT );
1636 : mvr2r( pDFT_DMX, DFT_R, hStereoDft->NFFT );
1637 : #endif
1638 : }
1639 :
1640 : /* Comfort Noise Addition */
1641 3248022 : if ( st0->flag_cna )
1642 : {
1643 2776080 : ptr_per = &hFdCngDec->smoothed_psd[hFdCngCom->startBand];
1644 :
1645 2776080 : scale_fact0 = 0.0f;
1646 2776080 : if ( hFdCngDec->cna_rescale_fact > 0 )
1647 : {
1648 2329626 : scale_fact0 = output_frame / 2 * sqrtf( hFdCngDec->cna_rescale_fact * 0.5f );
1649 : }
1650 :
1651 27392916 : for ( b = 0; b < hFdCngDec->cna_nbands; b++ )
1652 : {
1653 : /* calculate gamma factor reflecting inter-channel correlation and side gain (ILD) */
1654 24616836 : coh = hFdCngDec->cna_cm[b];
1655 24616836 : g = hFdCngDec->cna_g_state[b];
1656 :
1657 24616836 : if ( coh < 0.9f )
1658 : {
1659 19617924 : gamma = coh;
1660 19617924 : gamma = gamma / ( 1 - gamma );
1661 19617924 : gamma = sqrtf( gamma + 1 - g * g ) - sqrtf( gamma );
1662 : }
1663 : else
1664 : {
1665 4998912 : gamma = 0;
1666 : }
1667 :
1668 466013556 : for ( i = max( hFdCngDec->cna_band_limits[b], hFdCngCom->startBand / 2 ); i < min( hFdCngDec->cna_band_limits[b + 1], L_FRAME16k / 2 ); i++ )
1669 : {
1670 441396720 : lev1 = *ptr_per++;
1671 441396720 : lev2 = *ptr_per++;
1672 :
1673 441396720 : if ( lev1 > 0 && lev2 > 0 && max( lev1, lev2 ) / min( lev1, lev2 ) > 1.2f )
1674 : {
1675 : /* take the minimum of two adjacent frequency bins */
1676 29093490 : cna_level = min( lev1, lev2 );
1677 : }
1678 : else
1679 : {
1680 : /* take the average of two adjacent frequency bins */
1681 412303230 : cna_level = 0.5f * ( lev1 + lev2 );
1682 : }
1683 :
1684 441396720 : scale_fact = scale_fact0 * sqrtf( cna_level );
1685 :
1686 : /* generate comfort noise from gaussian noise and add to the decoded DFT spectrum */
1687 441396720 : N1 = scale_fact * rand_gauss( &ftmp, cna_seed );
1688 441396720 : N2 = scale_fact * rand_gauss( &ftmp, cna_seed );
1689 441396720 : DFT_L[2 * i] += ( 1 + g ) * N1 + gamma * N2;
1690 441396720 : DFT_R[2 * i] += ( 1 - g ) * N1 - gamma * N2;
1691 :
1692 441396720 : N1 = scale_fact * rand_gauss( &ftmp, cna_seed );
1693 441396720 : N2 = scale_fact * rand_gauss( &ftmp, cna_seed );
1694 441396720 : DFT_L[2 * i + 1] += ( 1 + g ) * N1 + gamma * N2;
1695 441396720 : DFT_R[2 * i + 1] += ( 1 - g ) * N1 - gamma * N2;
1696 : }
1697 : }
1698 :
1699 : /* update CNA re-scaling factor */
1700 2776080 : hFdCngDec->cna_rescale_fact = 0.8f * hFdCngDec->cna_act_fact;
1701 2776080 : if ( !hFdCngDec->first_cna_noise_updated )
1702 : {
1703 423528 : hFdCngDec->cna_rescale_fact = 0;
1704 : }
1705 : }
1706 :
1707 : /* Update memories */
1708 3248022 : hStereoDft->past_DMX_pos = ( hStereoDft->past_DMX_pos + 1 ) % STEREO_DFT_PAST_MAX;
1709 3248022 : mvr2r( pDFT_DMX, hStereoDft->DFT_past_DMX[hStereoDft->past_DMX_pos], min( hStereoDft->NFFT, STEREO_DFT32MS_N_32k ) );
1710 : #ifndef DEBUG_STEREO_DFT_NOSTEREO
1711 3248022 : if ( pPredGain )
1712 : {
1713 3248022 : stereo_dft_adapt_sf_delay( hStereoDft, pPredGain );
1714 : }
1715 : #endif
1716 :
1717 3248022 : mvr2r( DFT_L, DFT[0] + k * STEREO_DFT32MS_N_MAX, hStereoDft->NFFT );
1718 3248022 : mvr2r( DFT_R, DFT[1] + k * STEREO_DFT32MS_N_MAX, hStereoDft->NFFT );
1719 : }
1720 :
1721 1624011 : if ( st0->bfi && !prev_bfi )
1722 : {
1723 25146 : idx_k0 = ( hStereoDft->past_DMX_pos + STEREO_DFT_PAST_MAX - 1 ) % STEREO_DFT_PAST_MAX;
1724 25146 : idx_k1 = ( idx_k0 + 1 ) % STEREO_DFT_PAST_MAX;
1725 : /*dmx energy memory*/
1726 25146 : hStereoDft->past_dmx_nrg = stereo_dft_dmx_swb_nrg( hStereoDft->DFT_past_DMX[idx_k0], hStereoDft->DFT_past_DMX[idx_k1], min( hStereoDft->NFFT, STEREO_DFT32MS_N_32k ) );
1727 : }
1728 :
1729 1624011 : stereo_dft_compute_td_stefi_params( hStereoDft, samp_ratio );
1730 :
1731 1624011 : return;
1732 : }
1733 :
1734 :
1735 : /*-------------------------------------------------------------------------
1736 : * stereo_dft_dec_res()
1737 : *
1738 : * Decode the residual signal
1739 : *-------------------------------------------------------------------------*/
1740 :
1741 651939 : void stereo_dft_dec_res(
1742 : CPE_DEC_HANDLE hCPE, /* i/o: decoder CPE handle */
1743 : float res_buf[STEREO_DFT_N_8k], /* i : residual buffer */
1744 : float *output /* o : output */
1745 : )
1746 : {
1747 : int16_t i;
1748 : float win[L_FRAME8k + STEREO_DFT_OVL_8k];
1749 : float bpf_error_signal_8k[L_FRAME8k];
1750 : int16_t prev_bfi;
1751 : float fac, step;
1752 : int16_t res_bpf_flag;
1753 :
1754 651939 : prev_bfi = hCPE->hCoreCoder[0]->prev_old_bfi; /* The core decoding is already completed here and the prev_bfi has been updated for the next frame.
1755 : The prev_old_bfi still holds the prev_bfi for the current frame. */
1756 :
1757 : /* flush memories when switching residual coding on */
1758 651939 : if ( hCPE->hStereoDft->res_cod_mode[STEREO_DFT_OFFSET - 1] == STEREO_DFT_RES_COD_OFF )
1759 : {
1760 3648 : set_zero( hCPE->hStereoDft->res_cod_mem, STEREO_DFT_OVL_8k );
1761 3648 : set_zero( hCPE->input_mem[1], NS2SA( 8000, STEREO_DFT32MS_OVL_NS ) );
1762 3648 : set_zero( hCPE->hStereoDft->hBpf->pst_old_syn, STEREO_DFT_NBPSF_PIT_MAX_8k );
1763 3648 : hCPE->hStereoDft->hBpf->pst_mem_deemp_err = 0.f;
1764 : }
1765 :
1766 : /*Inverse MDCT*/
1767 651939 : TCX_MDCT_Inverse( res_buf, win, STEREO_DFT_OVL_8k, L_FRAME8k - STEREO_DFT_OVL_8k, STEREO_DFT_OVL_8k, IVAS_CPE_DFT );
1768 :
1769 651939 : if ( !prev_bfi )
1770 : {
1771 : /*OLA*/
1772 : /*overlapping parts*/
1773 45085284 : for ( i = 0; i < STEREO_DFT_OVL_8k; i++ )
1774 : {
1775 44450280 : win[i] = hCPE->hStereoDft->res_cod_mem[i] + win[i] * hCPE->hStereoDft->win_8k[i];
1776 44450280 : hCPE->hStereoDft->res_cod_mem[i] = win[L_FRAME8k + i] * hCPE->hStereoDft->win_8k[STEREO_DFT_OVL_8k - 1 - i];
1777 : }
1778 : }
1779 : else
1780 : {
1781 : /* For first good frame, ola memory contains extended ECU buffer -- need to crossfade instead of OLA */
1782 16935 : step = (float) ( 1.0f / STEREO_DFT_OVL_8k );
1783 16935 : fac = 0;
1784 1202385 : for ( i = 0; i < STEREO_DFT_OVL_8k; i++ )
1785 : {
1786 1185450 : win[i] = ( 1.0f - fac * fac ) * hCPE->hStereoDft->res_cod_mem[i] + ( 1.0f - ( 1.0f - fac ) * ( 1.0f - fac ) ) * win[i] * hCPE->hStereoDft->win_8k[i];
1787 1185450 : hCPE->hStereoDft->res_cod_mem[i] = win[L_FRAME8k + i] * hCPE->hStereoDft->win_8k[STEREO_DFT_OVL_8k - 1 - i];
1788 1185450 : fac += step;
1789 : }
1790 : }
1791 :
1792 : #ifdef DEBUG_STEREO_DFT_NOQRES
1793 : {
1794 : int16_t tmp[1024];
1795 : dbgread( &tmp, sizeof( int16_t ), L_FRAME8k, "./res/stereo_dft_enc_res_original.pcm" );
1796 : for ( i = 0; i < L_FRAME8k; i++ )
1797 : {
1798 : win[i] = (float) ( tmp[i] );
1799 : }
1800 : }
1801 : #endif
1802 651939 : mvr2r( win, output, L_FRAME8k );
1803 :
1804 : #ifdef DEBUG_MODE_DFT
1805 : {
1806 : int16_t tmp[L_FRAME8k];
1807 :
1808 : for ( i = 0; i < L_FRAME8k; i++ )
1809 : {
1810 : tmp[i] = (int16_t) ( win[i] );
1811 : }
1812 : dbgwrite( tmp, sizeof( int16_t ), L_FRAME8k, 1, "./res/stereo_dft_dec_res_decoded.pcm" );
1813 : }
1814 : #endif
1815 651939 : if ( hCPE->hCoreCoder[0]->core == ACELP_CORE )
1816 : {
1817 : /* bass post-filter */
1818 299076 : bass_psfilter( hCPE->hStereoDft->hBpf, hCPE->hCoreCoder[0]->Opt_AMR_WB, output, L_FRAME8k, hCPE->hCoreCoder[0]->old_pitch_buf + ( L_FRAME8k / STEREO_DFT_L_SUBFR_8k ), hCPE->hCoreCoder[0]->bpf_off,
1819 299076 : hCPE->hCoreCoder[0]->stab_fac, &hCPE->hStereoDft->stab_fac_smooth_res, hCPE->hCoreCoder[0]->last_coder_type, bpf_error_signal_8k );
1820 :
1821 299076 : res_bpf_flag = res_bpf_adapt( hCPE->hStereoDft, bpf_error_signal_8k, res_buf );
1822 299076 : if ( prev_bfi )
1823 : {
1824 : /* Ramp up BPF contribution for the first good frame */
1825 7362 : step = (float) ( 1.0f / L_FRAME8k );
1826 7362 : fac = 0;
1827 1185282 : for ( i = 0; i < L_FRAME8k; i++ )
1828 : {
1829 1177920 : bpf_error_signal_8k[i] *= fac;
1830 1177920 : fac += step;
1831 : }
1832 : }
1833 :
1834 299076 : if ( res_bpf_flag )
1835 : {
1836 279585 : v_sub( output, bpf_error_signal_8k, output, L_FRAME8k );
1837 : }
1838 : }
1839 352863 : else if ( hCPE->hCoreCoder[0]->last_core == ACELP_CORE )
1840 : {
1841 0 : set_zero( hCPE->hStereoDft->hBpf->pst_old_syn, STEREO_DFT_NBPSF_PIT_MAX_8k );
1842 0 : hCPE->hStereoDft->hBpf->pst_mem_deemp_err = 0.f;
1843 : }
1844 : #ifdef DEBUG_MODE_DFT
1845 : {
1846 : int16_t v;
1847 : int16_t out_bpf[L_FRAME8k];
1848 :
1849 : if ( hCPE->hCoreCoder[0]->core == ACELP_CORE )
1850 : {
1851 : for ( v = 0; v < L_FRAME8k; v++ )
1852 : {
1853 : out_bpf[v] = (int16_t) bpf_error_signal_8k[v];
1854 : }
1855 : }
1856 : else
1857 : {
1858 : set_s( out_bpf, 0, L_FRAME8k );
1859 : }
1860 : dbgwrite( out_bpf, sizeof( int16_t ), L_FRAME8k, 1, "res/bpf_res.pcm" );
1861 : }
1862 : #endif
1863 :
1864 651939 : return;
1865 : }
1866 :
1867 :
1868 : /*-------------------------------------------------------------------------
1869 : * stereo_dft_dec_read_BS()
1870 : *
1871 : * Read bitstream
1872 : *-------------------------------------------------------------------------*/
1873 :
1874 1776990 : void stereo_dft_dec_read_BS(
1875 : const int32_t ivas_total_brate, /* i : IVAS total bitrate */
1876 : const int32_t element_brate, /* i : element bitrate */
1877 : int32_t *total_brate, /* o : total bitrate */
1878 : Decoder_State *st, /* i/o: decoder state structure */
1879 : STEREO_DFT_DEC_DATA_HANDLE hStereoDft, /* i/o: decoder stereo handle */
1880 : const int16_t bwidth, /* i : bandwidth */
1881 : const int16_t output_frame, /* i : output frame length */
1882 : float res_buf[STEREO_DFT_N_8k], /* o : residual buffer */
1883 : int16_t *nb_bits, /* o : number of bits read */
1884 : float *coh, /* i/o: Coherence */
1885 : const int16_t ivas_format /* i : ivas format */
1886 : )
1887 : {
1888 : int16_t b, N_div, nbands;
1889 : int16_t NFFT_inner;
1890 : int16_t k, k_offset;
1891 : int16_t I;
1892 : int16_t max_bits;
1893 : uint16_t bit_stream_side[800]; /*Max bits per frame for 30kbps*/
1894 : RangeUniDecState range_uni_dec_state;
1895 : ECSQ_instance ecsq_inst;
1896 :
1897 : /* needed for provisorial reordering of indices */
1898 : int16_t ind1[STEREO_DFT_BAND_MAX];
1899 : int16_t n_bits;
1900 : int16_t nb, ind1_ipd[STEREO_DFT_BAND_MAX], ind1_pred[STEREO_DFT_BAND_MAX];
1901 : int16_t sign_flag;
1902 : float sg_tmp[STEREO_DFT_BAND_MAX];
1903 : float res_pred_gain_tmp[STEREO_DFT_BAND_MAX];
1904 : int16_t itd_mode;
1905 :
1906 : #ifdef DEBUG_MODE_DFT
1907 : static FILE *pF = NULL;
1908 : static FILE *ITD_values = NULL, *side_gain_values = NULL, *RPG_values = NULL;
1909 :
1910 : if ( pF == NULL )
1911 : pF = fopen( "./res/stereo_dft_dec_ind.txt", "w" );
1912 : if ( ITD_values == NULL )
1913 : ITD_values = fopen( "./res/itd_indicies_dec.txt", "w" );
1914 : if ( side_gain_values == NULL )
1915 : side_gain_values = fopen( "./res/side_gain_indicies_dec.txt", "w" );
1916 : if ( RPG_values == NULL )
1917 : RPG_values = fopen( "./res/rpg_indicies_dec.txt", "w" );
1918 :
1919 : assert( *nb_bits <= 800 );
1920 : #endif
1921 : /*------------------------------------------------------------------*
1922 : * Initialization
1923 : *-----------------------------------------------------------------*/
1924 :
1925 1776990 : k_offset = STEREO_DFT_OFFSET;
1926 :
1927 1776990 : if ( ivas_total_brate == IVAS_SID_5k2 )
1928 : {
1929 11532 : if ( ivas_format == MASA_FORMAT )
1930 : {
1931 591 : hStereoDft->frame_nodata = 0;
1932 591 : hStereoDft->frame_sid_nodata = 1;
1933 591 : hStereoDft->frame_sid = 1;
1934 591 : *nb_bits = 0;
1935 : }
1936 : else
1937 : {
1938 10941 : hStereoDft->frame_nodata = 0;
1939 10941 : hStereoDft->frame_sid_nodata = 1;
1940 10941 : hStereoDft->frame_sid = 1;
1941 10941 : *nb_bits = ( IVAS_SID_5k2 - SID_2k40 ) / FRAMES_PER_SEC - SID_FORMAT_NBITS;
1942 : }
1943 : }
1944 1765458 : else if ( ivas_total_brate == FRAME_NO_DATA )
1945 : {
1946 68643 : hStereoDft->frame_nodata = 1;
1947 68643 : hStereoDft->frame_sid_nodata = 1;
1948 68643 : hStereoDft->frame_sid = 0;
1949 68643 : *nb_bits = 0;
1950 68643 : *total_brate = 0;
1951 68643 : hStereoDft->itd[k = hStereoDft->prm_res[k_offset] - 1 + k_offset] = hStereoDft->itd_xfade_target;
1952 68643 : hStereoDft->gipd[hStereoDft->prm_res[k_offset] - 1 + k_offset] = hStereoDft->ipd_xfade_target;
1953 :
1954 68643 : return;
1955 : }
1956 : else
1957 : {
1958 1696815 : hStereoDft->frame_nodata = 0;
1959 1696815 : hStereoDft->frame_sid_nodata = 0;
1960 1696815 : hStereoDft->frame_sid = 0;
1961 :
1962 1696815 : st->total_brate = *nb_bits * FRAMES_PER_SEC;
1963 : }
1964 :
1965 1708347 : hStereoDft->reverb_flag = 0;
1966 :
1967 : /* reverse the bitstream */
1968 329406216 : for ( b = 0; b < *nb_bits; b++ )
1969 : {
1970 327697869 : bit_stream_side[b] = st->bit_stream[-b];
1971 : }
1972 :
1973 : /* make sure the padding bits read ahead by the arithmetic coder (up to 16) or range coder (up to 32) have binary values */
1974 56375451 : for ( ; b < *nb_bits + 32; b++ )
1975 : {
1976 54667104 : bit_stream_side[b] = 0;
1977 : }
1978 1708347 : st->bit_stream = bit_stream_side;
1979 :
1980 : /*init*/
1981 1708347 : max_bits = *nb_bits;
1982 1708347 : *nb_bits = 0;
1983 1708347 : N_div = STEREO_DFT_NBDIV;
1984 :
1985 1708347 : if ( ivas_total_brate > IVAS_SID_5k2 )
1986 : {
1987 1696815 : mvr2r( hStereoDft->side_gain + 2 * STEREO_DFT_BAND_MAX, sg_tmp, STEREO_DFT_BAND_MAX );
1988 1696815 : mvr2r( hStereoDft->res_pred_gain + 2 * STEREO_DFT_BAND_MAX, res_pred_gain_tmp, STEREO_DFT_BAND_MAX );
1989 : }
1990 :
1991 : /* attackPresent always set to 0 in SID frames */
1992 1708347 : if ( hStereoDft->frame_sid )
1993 : {
1994 11532 : hStereoDft->attackPresent = 0;
1995 : }
1996 : else
1997 : {
1998 1696815 : hStereoDft->attackPresent = get_next_indice( st, 1 );
1999 1696815 : ( *nb_bits )++;
2000 : }
2001 :
2002 : /* read res_cod_mode from bitstream */
2003 1708347 : if ( bwidth == WB && hStereoDft->hConfig->ada_wb_res_cod_mode )
2004 : {
2005 131478 : hStereoDft->res_cod_mode[k_offset] = get_next_indice( st, 1 );
2006 131478 : ( *nb_bits )++;
2007 : #ifdef DEBUG_MODE_DFT
2008 : fprintf( pF, "res_cod_mode: %d\n", hStereoDft->res_cod_mode[k_offset] );
2009 : #endif
2010 : }
2011 :
2012 : /* read number of bands in the bitstream - depends on the audio bandwidth and not to output_Fs */
2013 1708347 : if ( hStereoDft->frame_sid )
2014 : {
2015 11532 : NFFT_inner = STEREO_DFT32MS_N_MAX * inner_frame_tbl[bwidth] / L_FRAME48k;
2016 : }
2017 : else
2018 : {
2019 1696815 : NFFT_inner = STEREO_DFT32MS_N_MAX * inner_frame_tbl[st->bwidth] / L_FRAME48k;
2020 : }
2021 :
2022 : /* Use coarse band partition in inactive frames */
2023 1708347 : if ( hStereoDft->frame_sid )
2024 : {
2025 11532 : hStereoDft->band_res[k_offset] = STEREO_DFT_BAND_RES_LOW;
2026 11532 : hStereoDft->res_cod_mode[k_offset] = STEREO_DFT_RES_COD_OFF;
2027 11532 : hStereoDft->nbands = stereo_dft_band_config( hStereoDft->band_limits, hStereoDft->band_res[k_offset], min( STEREO_DFT32MS_N_MAX, NFFT_inner ), DEC );
2028 :
2029 11532 : if ( hStereoDft->nbands > STEREO_DFT_COH_MAXBAND )
2030 : {
2031 1740 : hStereoDft->band_limits[STEREO_DFT_COH_MAXBAND] = hStereoDft->band_limits[hStereoDft->nbands];
2032 1740 : hStereoDft->nbands = STEREO_DFT_COH_MAXBAND;
2033 : }
2034 : }
2035 : else
2036 : {
2037 1696815 : hStereoDft->nbands = stereo_dft_band_config( hStereoDft->band_limits, hStereoDft->band_res[k_offset], NFFT_inner, DEC );
2038 : }
2039 :
2040 1708347 : hStereoDft->res_cod_band_max = dft_band_res_cod[hStereoDft->band_res[k_offset]][hStereoDft->res_cod_mode[k_offset]];
2041 1708347 : hStereoDft->res_cod_line_max = (int16_t) ( 0.5f + ( hStereoDft->band_limits[hStereoDft->res_cod_band_max] - 1 ) * 2.f * output_frame / (float) ( hStereoDft->NFFT ) );
2042 1708347 : hStereoDft->res_cod_line_max = 8 * ( hStereoDft->res_cod_line_max / 8 );
2043 1708347 : hStereoDft->res_pred_band_min = max( STEREO_DFT_RES_PRED_BAND_MIN, hStereoDft->res_cod_band_max );
2044 :
2045 : #ifdef DEBUG_MODE_DFT
2046 : fprintf( pF, "stereo Data: %d %d %d %d %d\n", hStereoDft->band_res[k_offset], hStereoDft->prm_res[k_offset], hStereoDft->res_pred_mode[k_offset], hStereoDft->res_cod_mode[k_offset], hStereoDft->res_cod_band_max );
2047 : fprintf( pF, "stereo Bands: %d\n", hStereoDft->nbands );
2048 : #endif
2049 :
2050 : /*Copy config. for all DFT frames*/
2051 1708347 : set_s( hStereoDft->band_res + k_offset + 1, hStereoDft->band_res[k_offset], N_div - 1 );
2052 1708347 : set_s( hStereoDft->prm_res + k_offset + 1, hStereoDft->prm_res[k_offset], N_div - 1 );
2053 1708347 : set_s( hStereoDft->res_pred_mode + k_offset + 1, hStereoDft->res_pred_mode[k_offset], N_div - 1 );
2054 1708347 : set_s( hStereoDft->res_cod_mode + k_offset + 1, hStereoDft->res_cod_mode[k_offset], N_div - 1 );
2055 :
2056 : /*------------------------------------------------------------------*
2057 : * Read DFT stereo parameters
2058 : *-----------------------------------------------------------------*/
2059 :
2060 : /* Sent from the latest to the oldest */
2061 3416694 : for ( k = hStereoDft->prm_res[k_offset] - 1; k < N_div; k += hStereoDft->prm_res[k + k_offset] )
2062 : {
2063 : #ifdef DEBUG_MODE_DFT
2064 : fprintf( pF, "ch[%d]:", k );
2065 : #endif
2066 : /* reset parameters */
2067 1708347 : set_zero( hStereoDft->side_gain + ( k + k_offset ) * STEREO_DFT_BAND_MAX, STEREO_DFT_BAND_MAX );
2068 1708347 : hStereoDft->gipd[k + k_offset] = 0.f;
2069 1708347 : set_zero( hStereoDft->res_pred_gain + ( k + k_offset ) * STEREO_DFT_BAND_MAX, STEREO_DFT_BAND_MAX );
2070 :
2071 : #ifdef DEBUG_MODE_DFT
2072 : fprintf( pF, "ITD: %d ", hStereoDft->hConfig->itd_mode );
2073 : #endif
2074 :
2075 1708347 : if ( !( ivas_format == MASA_FORMAT && ivas_total_brate <= IVAS_SID_5k2 ) )
2076 : {
2077 : /*------------------------------------------------------------------*
2078 : * read Side gains
2079 : *-----------------------------------------------------------------*/
2080 :
2081 : /* side gain */
2082 : /* get coding type */
2083 : /* Do not read and decode side gain if a NO_DATA frame */
2084 1707756 : if ( !hStereoDft->frame_nodata )
2085 : {
2086 1707756 : n_bits = 0;
2087 1707756 : nb = st->next_bit_pos;
2088 1707756 : n_bits = read_flag_EC_DFT( &st->bit_stream[nb], &hStereoDft->side_gain_flag_1 );
2089 1707756 : nb += n_bits;
2090 :
2091 1707756 : if ( hStereoDft->side_gain_flag_1 == 0 )
2092 : {
2093 1166637 : b = read_BS_adapt_GR_sg( st->bit_stream, nb, ind1, hStereoDft->nbands, &hStereoDft->side_gain_flag_2, dft_maps_sg );
2094 1166637 : n_bits += b;
2095 : }
2096 : else
2097 : {
2098 541119 : if ( hStereoDft->side_gain_flag_1 == 2 ) /* differential */
2099 : {
2100 533136 : b = read_BS_GR( st->bit_stream, nb, ind1, hStereoDft->nbands, &hStereoDft->side_gain_flag_2 );
2101 533136 : n_bits += b;
2102 5845035 : for ( b = 0; b < hStereoDft->nbands; b++ )
2103 : {
2104 5311899 : ind1[b] += hStereoDft->side_gain_index_previous[b];
2105 : }
2106 : }
2107 : else
2108 : {
2109 75048 : for ( b = 0; b < hStereoDft->nbands; b++ )
2110 : {
2111 67065 : ind1[b] = get_value( &st->bit_stream[nb], STEREO_DFT_SIDEGAIN_NBITS );
2112 67065 : nb += STEREO_DFT_SIDEGAIN_NBITS;
2113 67065 : n_bits += STEREO_DFT_SIDEGAIN_NBITS;
2114 : }
2115 : }
2116 : }
2117 :
2118 18560406 : for ( b = 0; b < hStereoDft->nbands; b++ )
2119 : {
2120 16852650 : hStereoDft->side_gain_index_previous[b] = ind1[b];
2121 :
2122 16852650 : hStereoDft->res_gains_ind[0][b + STEREO_DFT_BAND_MAX] = ind1[b];
2123 : }
2124 :
2125 : #ifdef DEBUG_MODE_DFT
2126 : for ( b = 0; b < hStereoDft->nbands; b++ )
2127 : {
2128 : fprintf( pF, "Side gain: %d ", ind1[b] );
2129 : fprintf( side_gain_values, " %d ", ind1[b] );
2130 : }
2131 : #endif
2132 1707756 : st->next_bit_pos += n_bits;
2133 1707756 : ( *nb_bits ) += n_bits;
2134 : }
2135 :
2136 : /*------------------------------------------------------------------*
2137 : * read ITDs
2138 : *-----------------------------------------------------------------*/
2139 :
2140 1707756 : if ( !hStereoDft->frame_sid_nodata )
2141 : {
2142 1696815 : itd_mode = get_next_indice( st, STEREO_DFT_ITD_MODE_NBITS );
2143 1696815 : ( *nb_bits ) += STEREO_DFT_ITD_MODE_NBITS; /*ITD mode flag: 1bit*/
2144 :
2145 1696815 : hStereoDft->itd[k + k_offset] = 0.f;
2146 1696815 : if ( itd_mode )
2147 : {
2148 440655 : ( *nb_bits ) += read_itd( st, &I );
2149 440655 : stereo_dft_dequantize_itd( &I, hStereoDft->itd + k + k_offset, st->output_Fs );
2150 : #ifdef DEBUG_MODE_DFT
2151 : fprintf( pF, "ITD: %d ", I );
2152 : fprintf( ITD_values, "%d %d ", frame, I );
2153 : #endif
2154 : }
2155 : }
2156 10941 : else if ( *nb_bits <= ( ( IVAS_SID_5k2 - SID_2k40 ) / FRAMES_PER_SEC - STEREO_DFT_ITD_MODE_NBITS - STEREO_DFT_SID_ITD_NBITS - 1 - SID_FORMAT_NBITS ) )
2157 : {
2158 10941 : itd_mode = get_next_indice( st, STEREO_DFT_ITD_MODE_NBITS );
2159 10941 : ( *nb_bits ) += STEREO_DFT_ITD_MODE_NBITS; /*ITD mode flag: 1bit*/
2160 :
2161 10941 : hStereoDft->itd[k + k_offset] = 0.f;
2162 10941 : if ( itd_mode )
2163 : {
2164 894 : sign_flag = get_next_indice( st, 1 );
2165 894 : I = get_next_indice( st, STEREO_DFT_SID_ITD_NBITS );
2166 894 : ( *nb_bits ) += STEREO_DFT_SID_ITD_NBITS + 1;
2167 894 : I = I << STEREO_DFT_SID_ITD_FAC;
2168 894 : I += 256 * sign_flag;
2169 894 : stereo_dft_dequantize_itd( &I, hStereoDft->itd + k + k_offset, st->output_Fs );
2170 : #ifdef DEBUG_MODE_DFT
2171 : fprintf( pF, "ITD: %d ", I );
2172 : fprintf( ITD_values, "%d %d ", frame, I );
2173 : #endif
2174 : }
2175 : }
2176 :
2177 : /*------------------------------------------------------------------*
2178 : * read IPDs
2179 : *-----------------------------------------------------------------*/
2180 :
2181 1707756 : n_bits = 0;
2182 1707756 : nb = st->next_bit_pos;
2183 :
2184 1707756 : if ( !hStereoDft->frame_sid_nodata )
2185 : {
2186 : /* Active frame */
2187 1696815 : hStereoDft->no_ipd_flag = st->bit_stream[nb];
2188 1696815 : nb += 1;
2189 1696815 : n_bits += 1;
2190 1696815 : if ( hStereoDft->no_ipd_flag == 0 )
2191 : {
2192 47436 : ind1_ipd[0] = get_value( &st->bit_stream[nb], STEREO_DFT_GIPD_NBITS );
2193 47436 : nb += STEREO_DFT_GIPD_NBITS;
2194 47436 : n_bits += STEREO_DFT_GIPD_NBITS;
2195 47436 : stereo_dft_dequantize_ipd( &ind1_ipd[0], hStereoDft->gipd + ( k + k_offset ), 1, STEREO_DFT_GIPD_NBITS );
2196 : }
2197 : }
2198 10941 : else if ( *nb_bits <= ( ( IVAS_SID_5k2 - SID_2k40 ) / FRAMES_PER_SEC - STEREO_DFT_FLAG_BITS - STEREO_DFT_SID_GIPD_NBITS - SID_FORMAT_NBITS ) )
2199 : {
2200 : /* SID frame, only read IPD only if enough bits left in bitstream */
2201 10941 : hStereoDft->no_ipd_flag = st->bit_stream[nb];
2202 10941 : nb += 1;
2203 10941 : n_bits += 1;
2204 10941 : if ( hStereoDft->no_ipd_flag == 0 )
2205 : {
2206 1200 : ind1_ipd[0] = get_value( &st->bit_stream[nb], STEREO_DFT_SID_GIPD_NBITS );
2207 1200 : nb += STEREO_DFT_SID_GIPD_NBITS;
2208 1200 : n_bits += STEREO_DFT_SID_GIPD_NBITS;
2209 1200 : stereo_dft_dequantize_ipd( &ind1_ipd[0], hStereoDft->gipd + ( k + k_offset ), 1, STEREO_DFT_SID_GIPD_NBITS );
2210 : }
2211 : }
2212 : else
2213 : {
2214 0 : hStereoDft->no_ipd_flag = 1;
2215 : }
2216 :
2217 1707756 : st->next_bit_pos += n_bits;
2218 1707756 : ( *nb_bits ) += n_bits;
2219 :
2220 : /*------------------------------------------------------------------*
2221 : * read Residual parameters
2222 : *-----------------------------------------------------------------*/
2223 :
2224 : /* Residual prediction */ /* Switch it off if ITD detected */
2225 1707756 : n_bits = 0;
2226 1707756 : nb = st->next_bit_pos;
2227 :
2228 : /* Not used in inactive frames */
2229 1707756 : if ( !hStereoDft->frame_sid_nodata )
2230 : {
2231 1696815 : if ( hStereoDft->res_pred_mode[k + k_offset] && ( hStereoDft->attackPresent == 0 ) )
2232 : {
2233 1648581 : nbands = min( hStereoDft->nbands, STEREO_DFT_RES_PRED_BAND_MAX );
2234 :
2235 1648581 : hStereoDft->reverb_flag = 0;
2236 1648581 : hStereoDft->nbands_respred = nbands;
2237 :
2238 : /* Read bit for adaptive SF (WB/SWB & FB) */
2239 1648581 : if ( hStereoDft->hConfig->res_cod_mode == STEREO_DFT_RES_COD_OFF )
2240 : {
2241 1007841 : hStereoDft->reverb_flag = get_next_indice( st, STEREO_DFT_REVERB_MODE_NBITS );
2242 1007841 : ( *nb_bits ) += STEREO_DFT_REVERB_MODE_NBITS;
2243 1007841 : nb += STEREO_DFT_REVERB_MODE_NBITS;
2244 : #ifdef DEBUG_MODE_DFT
2245 : fprintf( RPG_values, " reverb_flag %d ", hStereoDft->reverb_flag );
2246 : #endif
2247 1007841 : if ( hStereoDft->reverb_flag )
2248 : {
2249 382635 : nbands -= STEREO_DFT_RES_PRED_BAND_MIN_CONST;
2250 : }
2251 : }
2252 :
2253 : /* get coding type */
2254 1648581 : b = read_flag_EC_DFT( &st->bit_stream[nb], &hStereoDft->res_pred_flag_0 );
2255 1648581 : nb += b;
2256 1648581 : n_bits += b;
2257 :
2258 1648581 : if ( hStereoDft->res_pred_flag_0 == 0 )
2259 : {
2260 : #ifdef DEBUG_MODE_DFT
2261 : fprintf( RPG_values, "flag: 0" );
2262 : #endif
2263 468873 : b = read_BS_adapt_GR_rpg( st->bit_stream, nb, ind1_pred, hStereoDft->res_pred_band_min, nbands, &hStereoDft->res_pred_flag_1 );
2264 468873 : n_bits += b;
2265 : }
2266 : else
2267 : {
2268 1179708 : if ( hStereoDft->res_pred_flag_0 == 2 )
2269 : {
2270 : #ifdef DEBUG_MODE_DFT
2271 : fprintf( RPG_values, "flag: 2" );
2272 : #endif
2273 1071132 : b = read_BS_GR( st->bit_stream, nb, &ind1_pred[hStereoDft->res_pred_band_min], nbands - hStereoDft->res_pred_band_min, &hStereoDft->res_pred_flag_1 );
2274 :
2275 1071132 : n_bits += b;
2276 8591895 : for ( b = hStereoDft->res_pred_band_min; b < nbands; b++ )
2277 : {
2278 7520763 : ind1_pred[b] += hStereoDft->res_pred_index_previous[b];
2279 : }
2280 : }
2281 : else
2282 : {
2283 : #ifdef DEBUG_MODE_DFT
2284 : fprintf( RPG_values, "flag: 1" );
2285 : #endif
2286 836604 : for ( b = hStereoDft->res_pred_band_min; b < nbands; b++ )
2287 : {
2288 728028 : ind1_pred[b] = get_value( &st->bit_stream[nb], STEREO_DFT_RES_GAINS_BITS );
2289 728028 : nb += STEREO_DFT_RES_GAINS_BITS;
2290 728028 : n_bits += STEREO_DFT_RES_GAINS_BITS;
2291 : }
2292 : }
2293 : }
2294 :
2295 4821111 : for ( b = 0; b < hStereoDft->res_pred_band_min; b++ )
2296 : {
2297 3172530 : I = 0;
2298 3172530 : stereo_dft_dequantize_res_gains( ind1 + b, &I, hStereoDft->side_gain + ( k + k_offset ) * STEREO_DFT_BAND_MAX + b, hStereoDft->res_pred_gain + ( k + k_offset ) * STEREO_DFT_BAND_MAX + b, 1 );
2299 3172530 : hStereoDft->res_pred_index_previous[b] = I;
2300 3172530 : hStereoDft->res_gains_ind[1][b + STEREO_DFT_BAND_MAX] = 0;
2301 : }
2302 :
2303 13221495 : for ( b = hStereoDft->res_pred_band_min; b < nbands; b++ )
2304 : {
2305 11572914 : I = ind1_pred[b];
2306 11572914 : stereo_dft_dequantize_res_gains( ind1 + b, &I, hStereoDft->side_gain + ( k + k_offset ) * STEREO_DFT_BAND_MAX + b, hStereoDft->res_pred_gain + ( k + k_offset ) * STEREO_DFT_BAND_MAX + b, 1 );
2307 : #ifdef DEBUG_MODE_DFT
2308 : fprintf( pF, "Res pred values: %d ", I );
2309 : if ( hStereoDft->res_pred_flag_0 == 2 )
2310 : fprintf( RPG_values, " %d(%d) ", I, hStereoDft->res_pred_index_previous[b] );
2311 : else
2312 : fprintf( RPG_values, " %d ", I );
2313 : #endif
2314 11572914 : hStereoDft->res_pred_index_previous[b] = I;
2315 11572914 : hStereoDft->res_gains_ind[1][b + STEREO_DFT_BAND_MAX] = I;
2316 : }
2317 :
2318 3202917 : for ( ; b < hStereoDft->nbands; b++ )
2319 : {
2320 1554336 : I = 0;
2321 1554336 : stereo_dft_dequantize_res_gains( ind1 + b, &I, hStereoDft->side_gain + ( k + k_offset ) * STEREO_DFT_BAND_MAX + b, hStereoDft->res_pred_gain + ( k + k_offset ) * STEREO_DFT_BAND_MAX + b, 1 );
2322 1554336 : hStereoDft->res_pred_index_previous[b] = I;
2323 1554336 : hStereoDft->res_gains_ind[1][b + STEREO_DFT_BAND_MAX] = 0;
2324 : }
2325 : }
2326 : else
2327 : {
2328 537963 : for ( b = 0; b < hStereoDft->nbands; b++ )
2329 : {
2330 489729 : I = 0;
2331 489729 : stereo_dft_dequantize_res_gains( ind1 + b, &I, hStereoDft->side_gain + ( k + k_offset ) * STEREO_DFT_BAND_MAX + b, hStereoDft->res_pred_gain + ( k + k_offset ) * STEREO_DFT_BAND_MAX + b, 1 );
2332 489729 : hStereoDft->res_pred_index_previous[b] = I;
2333 489729 : hStereoDft->res_gains_ind[1][b + STEREO_DFT_BAND_MAX] = I;
2334 : }
2335 : }
2336 :
2337 1696815 : st->next_bit_pos += n_bits;
2338 1696815 : ( *nb_bits ) += n_bits;
2339 : }
2340 : else
2341 : {
2342 : /* Dequantize sidegain if SID frame */
2343 10941 : if ( hStereoDft->frame_sid )
2344 : {
2345 74082 : for ( b = 0; b < hStereoDft->nbands; b++ )
2346 : {
2347 63141 : I = 0;
2348 63141 : stereo_dft_dequantize_res_gains( ind1 + b, &I, hStereoDft->side_gain + ( k + k_offset ) * STEREO_DFT_BAND_MAX + b, hStereoDft->res_pred_gain + ( k + k_offset ) * STEREO_DFT_BAND_MAX + b, 1 );
2349 : }
2350 : }
2351 : }
2352 : }
2353 :
2354 : #ifdef DEBUG_MODE_DFT
2355 : /*fprintf(stderr, "\nbres: %d\n", *nb_bits - nb_bits0);*/
2356 : #endif
2357 : }
2358 :
2359 1708347 : if ( !( ivas_format == MASA_FORMAT && ivas_total_brate <= IVAS_SID_5k2 ) )
2360 : {
2361 1707756 : if ( hStereoDft->side_gain_flag_1 != 2 )
2362 : {
2363 1174620 : hStereoDft->sg_mem_corrupt = 0;
2364 : }
2365 : }
2366 :
2367 1708347 : if ( ivas_total_brate > IVAS_SID_5k2 )
2368 : {
2369 1696815 : hStereoDft->recovery_flg = stereo_dft_sg_recovery( hStereoDft );
2370 :
2371 1696815 : if ( hStereoDft->recovery_flg )
2372 : {
2373 6474 : mvr2r( sg_tmp, hStereoDft->side_gain + 2 * STEREO_DFT_BAND_MAX, STEREO_DFT_BAND_MAX );
2374 6474 : mvr2r( res_pred_gain_tmp, hStereoDft->res_pred_gain + 2 * STEREO_DFT_BAND_MAX, STEREO_DFT_BAND_MAX );
2375 : }
2376 : }
2377 :
2378 : /*----------------------------------------------------------------*
2379 : * Residual decoding: spectral lines
2380 : *----------------------------------------------------------------*/
2381 :
2382 : /* Residual coding not used in inactive frames */
2383 1708347 : if ( hStereoDft->res_cod_band_max > 0 && !hStereoDft->frame_sid_nodata )
2384 : {
2385 : int16_t dec[STEREO_DFT_N_MAX_RES];
2386 :
2387 651939 : I = get_next_indice( st, STEREO_DFT_RES_GLOBAL_GAIN_BITS );
2388 651939 : ( *nb_bits ) += STEREO_DFT_RES_GLOBAL_GAIN_BITS;
2389 :
2390 : #ifdef DEBUG_MODE_DFT
2391 : fprintf( pF, "\nGain: %d ", I );
2392 : #endif
2393 :
2394 651939 : push_wmops( "residual_decode" );
2395 651939 : if ( I != ECSQ_GLOBAL_GAIN_INDEX_ALL_ZERO )
2396 : {
2397 600360 : ECSQ_init_instance( &ecsq_inst, 0 /*dummy index*/, &range_uni_dec_state );
2398 :
2399 600360 : rc_uni_dec_init( &range_uni_dec_state, bit_stream_side + *nb_bits, max_bits - *nb_bits );
2400 :
2401 600360 : hStereoDft->res_global_gain = ECSQ_dequantize_gain( I );
2402 :
2403 600360 : ecsq_inst.config_index = 2 * hStereoDft->res_cod_mode[k_offset] - 1;
2404 :
2405 600360 : ECSQ_decode( &ecsq_inst, hStereoDft->res_cod_line_max, dec );
2406 :
2407 600360 : n_bits = rc_uni_dec_finish( &range_uni_dec_state );
2408 :
2409 : #ifdef DEBUGGING
2410 : /* IVAS_fmToDo: the assert has to be changed with proper bitstream error handling */
2411 : assert( range_uni_dec_state.bit_error_detected == 0 );
2412 : #endif
2413 :
2414 600360 : set_zero( res_buf, STEREO_DFT_N_8k );
2415 600360 : ECSQ_dequantize_vector( dec, hStereoDft->res_global_gain, hStereoDft->res_cod_line_max, res_buf );
2416 : }
2417 : else
2418 : {
2419 51579 : set_s( dec, 0, hStereoDft->res_cod_line_max );
2420 51579 : hStereoDft->res_global_gain = 0.0f;
2421 51579 : n_bits = 0;
2422 51579 : set_zero( res_buf, STEREO_DFT_N_8k );
2423 : }
2424 :
2425 651939 : ( *nb_bits ) += n_bits;
2426 651939 : pop_wmops();
2427 :
2428 : #ifdef DEBUG_MODE_DFT
2429 : fprintf( pF, "%d (max: %d)", n_bits + STEREO_DFT_RES_GLOBAL_GAIN_BITS, max_bits );
2430 : /*fprintf(pF, "%d (max: %d)", n_bits, max_bits);*/
2431 : #endif
2432 : }
2433 :
2434 1708347 : if ( hStereoDft->frame_sid && !( ivas_format == MASA_FORMAT && ivas_total_brate <= IVAS_SID_5k2 ) )
2435 : {
2436 10941 : stereo_dft_dec_sid_coh( st, hStereoDft->nbands, coh, nb_bits );
2437 : }
2438 :
2439 1708347 : if ( ivas_total_brate == IVAS_SID_5k2 && ivas_format != MASA_FORMAT )
2440 : {
2441 10941 : *nb_bits = (int16_t) ( ( element_brate - SID_2k40 ) / FRAMES_PER_SEC ); /* => hCPE->hCoreCoder[0]->total_brate = SID_2k40; */
2442 : }
2443 : {
2444 1708347 : *total_brate = element_brate - ( *nb_bits * FRAMES_PER_SEC );
2445 : }
2446 :
2447 : #ifdef DEBUG_MODE_DFT
2448 : /*fprintf(pF, "Total bits: %d", (*nb_bits));*/
2449 : fprintf( pF, "\n" );
2450 : fprintf( ITD_values, "\n" );
2451 : fprintf( side_gain_values, "\n" );
2452 : fprintf( RPG_values, "\n" );
2453 : #endif
2454 :
2455 1708347 : return;
2456 : }
2457 :
2458 :
2459 : /*-------------------------------------------------------------------------
2460 : * stereo_dft_compute_td_stefi_params()
2461 : *
2462 : *
2463 : *-------------------------------------------------------------------------*/
2464 :
2465 1624011 : static void stereo_dft_compute_td_stefi_params(
2466 : STEREO_DFT_DEC_DATA_HANDLE hStereoDft, /* i/o: decoder DFT stereo handle */
2467 : const float samp_ratio /* i : sampling ratio */
2468 : )
2469 : {
2470 : int16_t pdmx_ind;
2471 : float g2;
2472 : int16_t bin0;
2473 : int16_t band0;
2474 : int16_t b;
2475 : int16_t nbands;
2476 : int16_t bres;
2477 : float wsum;
2478 : float pred_gain_avg, pred_g;
2479 : float nrg_DMX, nrg_pred_DMX;
2480 :
2481 1624011 : pdmx_ind = hStereoDft->past_DMX_pos;
2482 1624011 : bres = hStereoDft->band_res[1];
2483 :
2484 1624011 : if ( hStereoDft->core_hist[1] != ACELP_CORE || hStereoDft->wasTransient )
2485 : {
2486 934311 : hStereoDft->td_gain[0] = 0;
2487 :
2488 934311 : return;
2489 : }
2490 :
2491 689700 : bin0 = (int16_t) ( samp_ratio * hStereoDft->NFFT / 2 + .5 );
2492 689700 : bin0 = min( bin0, hStereoDft->band_limits[hStereoDft->nbands] );
2493 689700 : b = hStereoDft->nbands;
2494 2205777 : while ( hStereoDft->band_limits[b] > bin0 )
2495 : {
2496 1516077 : b--;
2497 : }
2498 689700 : band0 = b;
2499 :
2500 : /* calculate averages over high bands */
2501 689700 : pred_g = pred_gain_avg = 0;
2502 689700 : nbands = 0;
2503 689700 : wsum = 0;
2504 2160021 : for ( b = band0; b < hStereoDft->nbands; b++ )
2505 : {
2506 1488267 : if ( min( hStereoDft->past_res_pred_gain[STEFI_DELAY_IND( STEREO_DFT_TD_STEFI_SUBFR_DELAY + 1, pdmx_ind )][b], hStereoDft->past_res_pred_gain[STEFI_DELAY_IND( STEREO_DFT_TD_STEFI_SUBFR_DELAY + 2, pdmx_ind )][b] ) < 0 )
2507 : {
2508 17946 : hStereoDft->td_gain[0] = 0;
2509 17946 : return;
2510 : }
2511 1470321 : pred_g += ( hStereoDft->res_pred_gain[b + STEREO_DFT_BAND_MAX] + hStereoDft->res_pred_gain[b + 2 * STEREO_DFT_BAND_MAX] ) / 2 * dft_res_pred_weights[bres][b - band0];
2512 1470321 : pred_gain_avg += ( hStereoDft->past_res_pred_gain[STEFI_DELAY_IND( STEREO_DFT_TD_STEFI_SUBFR_DELAY + 2, pdmx_ind )][b] + hStereoDft->past_res_pred_gain[STEFI_DELAY_IND( STEREO_DFT_TD_STEFI_SUBFR_DELAY + 1, pdmx_ind )][b] ) / 2 * dft_res_pred_weights[bres][b - band0];
2513 :
2514 1470321 : nbands++;
2515 1470321 : wsum += dft_res_pred_weights[bres][b - band0];
2516 : }
2517 :
2518 671754 : if ( nbands == 0 )
2519 : {
2520 : /* apparently, there is nothing to do here */
2521 74853 : hStereoDft->td_gain[0] = 0;
2522 74853 : return;
2523 : }
2524 :
2525 596901 : pred_g /= wsum;
2526 596901 : pred_gain_avg /= wsum;
2527 :
2528 596901 : nrg_DMX = hStereoDft->hb_nrg[0];
2529 596901 : nrg_pred_DMX = hStereoDft->hb_nrg[1];
2530 :
2531 596901 : g2 = pred_g * sqrtf( ( 0.001f + nrg_DMX ) / ( 0.001f + nrg_pred_DMX ) );
2532 :
2533 596901 : hStereoDft->td_gain[0] = min( pred_gain_avg * STEREO_DFT_STEFFI_GAIN_AMP, pred_gain_avg * ( 1 - STEREO_DFT_STEFFI_GAIN_REST_AMT ) + g2 * STEREO_DFT_STEFFI_GAIN_REST_AMT );
2534 :
2535 596901 : return;
2536 : }
2537 :
2538 :
2539 : /*-------------------------------------------------------------------------
2540 : * stereo_dft_generate_res_pred()
2541 : *
2542 : *
2543 : *-------------------------------------------------------------------------*/
2544 2957070 : void stereo_dft_generate_res_pred(
2545 : STEREO_DFT_DEC_DATA_HANDLE hStereoDft, /* i/o: decoder DFT stereo handle */
2546 : const float samp_ratio, /* i : sampling ratio */
2547 : float *pDFT_DMX, /* i : downmix signal */
2548 : float *DFT_PRED_RES, /* o : residual prediction signal */
2549 : float *pPredGain, /* i : residual prediction gains */
2550 : const int16_t k, /* i : subframe index */
2551 : float *ap_filt_DMX, /* i : enhanced stereo filling signal */
2552 : int16_t *stop, /* o : last FD stereo filling bin */
2553 : const int16_t bfi /* i : BFI flag */
2554 : )
2555 : {
2556 : /* general variables */
2557 : int16_t i, b;
2558 : int16_t begin, end;
2559 : int16_t bin0, band0; /* ESF->Stefi crossover bin/band */
2560 : int16_t lb_stefi_start_band;
2561 :
2562 : /* variables for enhanced stereo filling */
2563 : float norm_fac;
2564 : float alpha, gain_limit;
2565 :
2566 : /* variables for stereo filling */
2567 : int16_t d_long, d_short, d_long_ind, d_short_ind;
2568 : float g_short, g_long;
2569 : float dmx_nrg, rev_nrg;
2570 : float past_dmx_nrg;
2571 : float pred_gain_avg;
2572 : float g2;
2573 : int16_t nbands_respred;
2574 :
2575 2957070 : push_wmops( "gen_respred" );
2576 :
2577 : /* smoothing and limiting parameters */
2578 2957070 : alpha = hStereoDft->wasTransient ? 0 : 0.2f; /* no smoothing after transients */
2579 2957070 : gain_limit = 2;
2580 :
2581 : /* residual prediction only used up to 16 kHz (SWB) */
2582 2957070 : nbands_respred = min( hStereoDft->nbands, STEREO_DFT_RES_PRED_BAND_MAX );
2583 :
2584 : /* In ACELP mode the downmix signal is not available in bandwidth extension area. *
2585 : * Therefore, the downmix energy in the corresponding subbands is estimated. */
2586 2957070 : bin0 = (int16_t) ( samp_ratio * hStereoDft->NFFT / 2 + .5 );
2587 2957070 : bin0 = min( bin0, hStereoDft->band_limits[hStereoDft->nbands] );
2588 2957070 : b = hStereoDft->nbands;
2589 9953802 : while ( hStereoDft->band_limits[b] >= bin0 )
2590 : {
2591 6996732 : b--;
2592 : }
2593 2957070 : band0 = b;
2594 :
2595 2957070 : if ( hStereoDft->res_pred_mode[k + STEREO_DFT_OFFSET] < STEREO_DFT_RESPRED_ESF )
2596 : {
2597 : /* no ESF signal available, use stereo filling over whole spectrum */
2598 1064064 : lb_stefi_start_band = max( hStereoDft->res_pred_band_min, hStereoDft->res_cod_band_max );
2599 : }
2600 : else
2601 : {
2602 : /* ESF signal available, use ESF in lowband, stereo filling in highband */
2603 1893006 : lb_stefi_start_band = max( band0, hStereoDft->res_cod_band_max );
2604 : }
2605 :
2606 2957070 : if ( bfi )
2607 : {
2608 82758 : lb_stefi_start_band = 0;
2609 : }
2610 :
2611 : /* lowband: use ESF if available, else use stereo filling */
2612 2957070 : if ( hStereoDft->res_pred_mode[k + STEREO_DFT_OFFSET] == STEREO_DFT_RESPRED_ESF )
2613 : {
2614 : /* ESF in lowband */
2615 : /* main loop over core region*/
2616 15968196 : for ( b = hStereoDft->res_cod_band_max; b <= band0; b++ )
2617 : {
2618 14075190 : dmx_nrg = EPSILON;
2619 14075190 : rev_nrg = EPSILON;
2620 :
2621 : /* calculate band energies (low band only in case of ACELP) */
2622 285601704 : for ( i = hStereoDft->band_limits[b]; i < min( hStereoDft->band_limits[b + 1], bin0 ); i++ )
2623 : {
2624 271526514 : dmx_nrg += pDFT_DMX[2 * i] * pDFT_DMX[2 * i] + pDFT_DMX[2 * i + 1] * pDFT_DMX[2 * i + 1];
2625 271526514 : rev_nrg += ap_filt_DMX[2 * i] * ap_filt_DMX[2 * i] + ap_filt_DMX[2 * i + 1] * ap_filt_DMX[2 * i + 1];
2626 : }
2627 :
2628 : /* smoothing */
2629 14075190 : hStereoDft->smooth_res_nrg[b] = alpha * hStereoDft->smooth_res_nrg[b] + ( 1 - alpha ) * rev_nrg;
2630 14075190 : hStereoDft->smooth_dmx_nrg[b] = alpha * hStereoDft->smooth_dmx_nrg[b] + ( 1 - alpha ) * dmx_nrg;
2631 :
2632 : /* normalization factor */
2633 14075190 : norm_fac = sqrtf( hStereoDft->smooth_dmx_nrg[b] / hStereoDft->smooth_res_nrg[b] );
2634 :
2635 : /* gain compressor */
2636 14075190 : norm_fac *= min( max( 0.8f, 1 / norm_fac ), 1.25f );
2637 :
2638 : /* gain limiter */
2639 14075190 : norm_fac = min( norm_fac, gain_limit );
2640 :
2641 285601704 : for ( i = hStereoDft->band_limits[b]; i < min( hStereoDft->band_limits[b + 1], bin0 ); i++ )
2642 : {
2643 271526514 : DFT_PRED_RES[2 * i] = norm_fac * pPredGain[b] * ap_filt_DMX[2 * i];
2644 271526514 : DFT_PRED_RES[2 * i + 1] = norm_fac * pPredGain[b] * ap_filt_DMX[2 * i + 1];
2645 : }
2646 : }
2647 : }
2648 1064064 : else if ( hStereoDft->res_pred_mode[k + STEREO_DFT_OFFSET] == STEREO_DFT_RESPRED_STEFI )
2649 : {
2650 : /* stefi in lowband */
2651 979122 : set_zero( DFT_PRED_RES, 2 * hStereoDft->band_limits[lb_stefi_start_band] );
2652 :
2653 6052662 : for ( b = lb_stefi_start_band; b <= band0; b++ )
2654 : {
2655 5073540 : d_short_ind = STEREO_DFT_PAST_MAX - STEREO_DFT_STEFFI_DELAY_SHORT + b % 2;
2656 5073540 : d_long_ind = max( 4, (int16_t) ( ( STEREO_DFT_PAST_MAX + 4 - 1 ) * ( (float) b / ( hStereoDft->nbands - 1 ) ) + 0.5f ) ) - 4;
2657 : /* make sure d_short really corresponds to a shorter or equally long delay than d_long (e.g. not always the case for
2658 : * STEREO_DFT_STEFFI_DELAY_SHORT=3 and STEREO_DFT_STEFFI_DELAY_LONG=4)*/
2659 5073540 : d_short_ind = max( d_short_ind, d_long_ind );
2660 :
2661 : /* Even number of window sliding (assymmetric OLA) */
2662 5073540 : d_short_ind = 2 * ( d_short_ind / 2 );
2663 5073540 : d_long_ind = 2 * ( d_long_ind / 2 );
2664 :
2665 5073540 : d_short = STEREO_DFT_PAST_MAX - d_short_ind;
2666 5073540 : d_long = STEREO_DFT_PAST_MAX - d_long_ind;
2667 :
2668 5073540 : d_short_ind = ( d_short_ind + hStereoDft->past_DMX_pos + 1 ) % STEREO_DFT_PAST_MAX;
2669 5073540 : d_long_ind = ( d_long_ind + hStereoDft->past_DMX_pos + 1 ) % STEREO_DFT_PAST_MAX;
2670 :
2671 5073540 : g_short = hStereoDft->stefi_short_gain;
2672 5073540 : g_long = hStereoDft->stefi_long_gain;
2673 :
2674 : /* change mixing ratio if long and short delay are the same */
2675 5073540 : if ( d_short == d_long )
2676 : {
2677 741984 : g_short = 1;
2678 741984 : g_long = 0;
2679 : }
2680 :
2681 : /* Avoid transient components */
2682 5073540 : if ( hStereoDft->past_res_pred_gain[d_short_ind][b] == -1 && hStereoDft->past_res_pred_gain[d_long_ind][b] == -1 )
2683 : {
2684 151878 : g_long = 0.0f;
2685 151878 : g_short = 0.0f;
2686 : }
2687 4921662 : else if ( hStereoDft->past_res_pred_gain[d_short_ind][b] == -1 )
2688 : {
2689 103662 : g_long = 1.0f;
2690 103662 : g_short = 0.0f;
2691 : }
2692 4818000 : else if ( hStereoDft->past_res_pred_gain[d_long_ind][b] == -1 )
2693 : {
2694 104256 : g_long = 0.0f;
2695 104256 : g_short = 1.0f;
2696 : }
2697 :
2698 5073540 : if ( max( g_short, g_long ) > 0 )
2699 : {
2700 4921662 : past_dmx_nrg = EPSILON;
2701 4921662 : dmx_nrg = EPSILON;
2702 134855676 : for ( i = hStereoDft->band_limits[b]; i < min( bin0, hStereoDft->band_limits[b + 1] ); i++ )
2703 : {
2704 129934014 : dmx_nrg += pDFT_DMX[2 * i] * pDFT_DMX[2 * i] + pDFT_DMX[2 * i + 1] * pDFT_DMX[2 * i + 1];
2705 :
2706 129934014 : DFT_PRED_RES[2 * i] = g_short * ( hStereoDft->DFT_past_DMX[d_short_ind][2 * i] ) + g_long * ( hStereoDft->DFT_past_DMX[d_long_ind][2 * i] );
2707 129934014 : DFT_PRED_RES[2 * i + 1] = g_short * ( hStereoDft->DFT_past_DMX[d_short_ind][2 * i + 1] ) + g_long * ( hStereoDft->DFT_past_DMX[d_long_ind][2 * i + 1] );
2708 :
2709 129934014 : past_dmx_nrg += DFT_PRED_RES[2 * i] * DFT_PRED_RES[2 * i] + DFT_PRED_RES[2 * i + 1] * DFT_PRED_RES[2 * i + 1];
2710 : }
2711 4921662 : if ( !bfi || b >= hStereoDft->res_cod_band_max )
2712 : {
2713 4689522 : norm_fac = sqrtf( ( 0.001f + dmx_nrg ) / ( 0.001f + past_dmx_nrg ) );
2714 4689522 : g2 = pPredGain[b] * norm_fac;
2715 4689522 : pred_gain_avg = g_short * hStereoDft->past_res_pred_gain[d_short_ind][b] +
2716 4689522 : g_long * hStereoDft->past_res_pred_gain[d_long_ind][b];
2717 :
2718 4689522 : g2 = min( pred_gain_avg * STEREO_DFT_STEFFI_GAIN_AMP, pred_gain_avg * ( 1 - STEREO_DFT_STEFFI_GAIN_REST_AMT ) + g2 * STEREO_DFT_STEFFI_GAIN_REST_AMT );
2719 :
2720 133694976 : for ( i = hStereoDft->band_limits[b]; i < min( bin0, hStereoDft->band_limits[b + 1] ); i++ )
2721 : {
2722 129005454 : DFT_PRED_RES[2 * i] *= g2;
2723 129005454 : DFT_PRED_RES[2 * i + 1] *= g2;
2724 : }
2725 : }
2726 : }
2727 : else
2728 : {
2729 151878 : set_zero( DFT_PRED_RES + 2 * hStereoDft->band_limits[b], 2 * ( min( bin0, hStereoDft->band_limits[b + 1] ) - hStereoDft->band_limits[b] ) );
2730 : }
2731 : }
2732 : }
2733 :
2734 : #ifndef DEBUG_STEREO_DFT_NOCORE
2735 2957070 : if ( hStereoDft->band_limits[nbands_respred] > bin0 )
2736 : {
2737 : /* apply stereo filling in ACELP BWE region */
2738 2548320 : if ( hStereoDft->core_hist[0] == ACELP_CORE && hStereoDft->core_hist[STEREO_DFT_STEFFI_DELAY_SHORT / 2] == ACELP_CORE )
2739 : {
2740 : /* ACELP -> ACELP: nothing to do */
2741 1194246 : *stop = bin0;
2742 : }
2743 1354074 : else if ( hStereoDft->core_hist[STEREO_DFT_STEFFI_DELAY_SHORT / 2] == ACELP_CORE )
2744 : {
2745 : /* ACELP -> TCX/HQ core transition */
2746 : /* calculate high band energy only */
2747 81660 : dmx_nrg = EPSILON;
2748 21262140 : for ( i = bin0; i < hStereoDft->NFFT / 2; i++ )
2749 : {
2750 21180480 : dmx_nrg += pDFT_DMX[2 * i] * pDFT_DMX[2 * i] + pDFT_DMX[2 * i + 1] * pDFT_DMX[2 * i + 1];
2751 : }
2752 :
2753 81660 : hStereoDft->hb_nrg[0] += dmx_nrg * 2 / hStereoDft->NFFT;
2754 81660 : *stop = bin0;
2755 : }
2756 1272414 : else if ( hStereoDft->core_hist[0] == ACELP_CORE )
2757 : {
2758 : /* TCX/HQ core -> ACELP transition */
2759 : /* apply short delay only and blend to long/short gain */
2760 45624 : dmx_nrg = hStereoDft->hb_nrg_subr[k];
2761 45624 : d_short_ind = STEREO_DFT_PAST_MAX - STEREO_DFT_TD_STEFI_SUBFR_DELAY;
2762 :
2763 45624 : d_short_ind = ( d_short_ind + hStereoDft->past_DMX_pos + 1 ) % STEREO_DFT_PAST_MAX;
2764 :
2765 : /* calculate high band energy of past dmx */
2766 45624 : past_dmx_nrg = EPSILON;
2767 6793272 : for ( i = bin0; i < min( hStereoDft->NFFT / 2, STEREO_DFT32MS_N_32k / 2 ); i++ )
2768 : {
2769 6747648 : past_dmx_nrg += hStereoDft->DFT_past_DMX[d_short_ind][2 * i] * hStereoDft->DFT_past_DMX[d_short_ind][2 * i] + hStereoDft->DFT_past_DMX[d_short_ind][2 * i + 1] * hStereoDft->DFT_past_DMX[d_short_ind][2 * i + 1];
2770 : }
2771 :
2772 160038 : for ( b = band0; b < nbands_respred; b++ )
2773 : {
2774 114414 : g_short = hStereoDft->past_res_pred_gain[d_short_ind][b] < 0 ? 0 : ( 1.f + hStereoDft->stefi_short_gain ) / 2;
2775 :
2776 114414 : if ( g_short > 0 )
2777 : {
2778 109494 : norm_fac = sqrtf( ( 0.001f + dmx_nrg ) / ( 0.001f + past_dmx_nrg ) );
2779 109494 : g2 = pPredGain[b] * norm_fac;
2780 109494 : pred_gain_avg = hStereoDft->past_res_pred_gain[d_short_ind][b] * g_short;
2781 :
2782 109494 : g2 = min( pred_gain_avg * STEREO_DFT_STEFFI_GAIN_AMP, pred_gain_avg * ( 1 - STEREO_DFT_STEFFI_GAIN_REST_AMT ) + g2 * STEREO_DFT_STEFFI_GAIN_REST_AMT );
2783 6499254 : for ( i = max( hStereoDft->band_limits[b], bin0 ); i < min( hStereoDft->band_limits[b + 1], STEREO_DFT32MS_N_32k / 2 ); i++ )
2784 : {
2785 6389760 : DFT_PRED_RES[2 * i] = g2 * hStereoDft->DFT_past_DMX[d_short_ind][2 * i];
2786 6389760 : DFT_PRED_RES[2 * i + 1] = g2 * hStereoDft->DFT_past_DMX[d_short_ind][2 * i + 1];
2787 : }
2788 : }
2789 : else
2790 : {
2791 4920 : begin = max( hStereoDft->band_limits[b], bin0 );
2792 4920 : end = min( hStereoDft->band_limits[b + 1], STEREO_DFT32MS_N_32k / 2 );
2793 4920 : set_zero( DFT_PRED_RES + 2 * begin, 2 * ( end - begin ) );
2794 : }
2795 : }
2796 : }
2797 : else
2798 : #endif
2799 : {
2800 4193880 : for ( b = band0; b < nbands_respred; b++ )
2801 : {
2802 : /* TCX/HQ core -> TCX/HQ core: business as usual */
2803 2967090 : d_short_ind = STEREO_DFT_PAST_MAX - STEREO_DFT_STEFFI_DELAY_SHORT + b % 2;
2804 2967090 : d_long_ind = max( 4, (int16_t) ( ( STEREO_DFT_PAST_MAX + 4 - 1 ) * ( (float) b / ( hStereoDft->nbands - 1 ) ) + 0.5f ) ) - 4;
2805 : /* make sure d_short really corresponds to a shorter or equally long delay than d_long (e.g. not always the case for
2806 : * STEREO_DFT_STEFFI_DELAY_SHORT=3 and STEREO_DFT_STEFFI_DELAY_LONG=4)*/
2807 2967090 : d_short_ind = max( d_short_ind, d_long_ind );
2808 :
2809 : /* Even number of window sliding (assymmetric OLA) */
2810 2967090 : d_short_ind = 2 * ( d_short_ind / 2 );
2811 2967090 : d_long_ind = 2 * ( d_long_ind / 2 );
2812 :
2813 2967090 : d_short = STEREO_DFT_PAST_MAX - d_short_ind;
2814 2967090 : d_long = STEREO_DFT_PAST_MAX - d_long_ind;
2815 :
2816 2967090 : d_short_ind = ( d_short_ind + hStereoDft->past_DMX_pos + 1 ) % STEREO_DFT_PAST_MAX;
2817 2967090 : d_long_ind = ( d_long_ind + hStereoDft->past_DMX_pos + 1 ) % STEREO_DFT_PAST_MAX;
2818 :
2819 2967090 : g_short = hStereoDft->stefi_short_gain;
2820 2967090 : g_long = hStereoDft->stefi_long_gain;
2821 :
2822 : /* change mixing ratio if long and short delay are the same */
2823 2967090 : if ( d_short == d_long )
2824 : {
2825 2619078 : g_short = 1;
2826 2619078 : g_long = 0;
2827 : }
2828 :
2829 : /* Avoid transient components */
2830 2967090 : if ( hStereoDft->past_res_pred_gain[d_short_ind][b] == -1 && hStereoDft->past_res_pred_gain[d_long_ind][b] == -1 )
2831 : {
2832 78348 : g_long = 0.0f;
2833 78348 : g_short = 0.0f;
2834 : }
2835 2888742 : else if ( hStereoDft->past_res_pred_gain[d_short_ind][b] == -1 )
2836 : {
2837 5448 : g_long = 1.0f;
2838 5448 : g_short = 0.0f;
2839 : }
2840 2883294 : else if ( hStereoDft->past_res_pred_gain[d_long_ind][b] == -1 )
2841 : {
2842 6624 : g_long = 0.0f;
2843 6624 : g_short = 1.0f;
2844 : }
2845 : #ifndef DEBUG_STEREO_DFT_NOCORE
2846 2967090 : if ( hStereoDft->core_hist[d_short / 2] == ACELP_CORE )
2847 : {
2848 0 : g_short = 0;
2849 : }
2850 2967090 : if ( hStereoDft->core_hist[d_long / 2] == ACELP_CORE )
2851 : {
2852 21498 : g_long = 0;
2853 : }
2854 : #endif
2855 :
2856 2967090 : if ( max( g_short, g_long ) > 0 )
2857 : {
2858 2886555 : past_dmx_nrg = EPSILON;
2859 2886555 : dmx_nrg = EPSILON;
2860 175641933 : for ( i = max( hStereoDft->band_limits[b], bin0 ); i < min( hStereoDft->band_limits[b + 1], STEREO_DFT32MS_N_32k / 2 ); i++ )
2861 : {
2862 172755378 : dmx_nrg += pDFT_DMX[2 * i] * pDFT_DMX[2 * i] + pDFT_DMX[2 * i + 1] * pDFT_DMX[2 * i + 1];
2863 :
2864 172755378 : DFT_PRED_RES[2 * i] = g_short * ( hStereoDft->DFT_past_DMX[d_short_ind][2 * i] ) + g_long * ( hStereoDft->DFT_past_DMX[d_long_ind][2 * i] );
2865 172755378 : DFT_PRED_RES[2 * i + 1] = g_short * ( hStereoDft->DFT_past_DMX[d_short_ind][2 * i + 1] ) + g_long * ( hStereoDft->DFT_past_DMX[d_long_ind][2 * i + 1] );
2866 :
2867 172755378 : past_dmx_nrg += DFT_PRED_RES[2 * i] * DFT_PRED_RES[2 * i] + DFT_PRED_RES[2 * i + 1] * DFT_PRED_RES[2 * i + 1];
2868 : }
2869 :
2870 2886555 : norm_fac = sqrtf( ( 0.001f + dmx_nrg ) / ( 0.001f + past_dmx_nrg ) );
2871 2886555 : g2 = pPredGain[b] * norm_fac;
2872 2886555 : pred_gain_avg = g_short * hStereoDft->past_res_pred_gain[d_short_ind][b] + g_long * hStereoDft->past_res_pred_gain[d_long_ind][b];
2873 :
2874 2886555 : g2 = min( pred_gain_avg * STEREO_DFT_STEFFI_GAIN_AMP, pred_gain_avg * ( 1 - STEREO_DFT_STEFFI_GAIN_REST_AMT ) + g2 * STEREO_DFT_STEFFI_GAIN_REST_AMT );
2875 :
2876 175641933 : for ( i = max( hStereoDft->band_limits[b], bin0 ); i < min( hStereoDft->band_limits[b + 1], STEREO_DFT32MS_N_32k / 2 ); i++ )
2877 : {
2878 172755378 : DFT_PRED_RES[2 * i] *= g2;
2879 172755378 : DFT_PRED_RES[2 * i + 1] *= g2;
2880 : }
2881 : }
2882 : else
2883 : {
2884 80535 : begin = max( hStereoDft->band_limits[b], bin0 );
2885 80535 : end = min( hStereoDft->band_limits[b + 1], STEREO_DFT32MS_N_32k / 2 );
2886 80535 : set_zero( DFT_PRED_RES + 2 * begin, 2 * ( end - begin ) );
2887 : }
2888 : }
2889 : }
2890 : #ifndef DEBUG_STEREO_DFT_NOCORE
2891 : }
2892 : #endif
2893 :
2894 : /* update buffers */
2895 26337732 : for ( b = hStereoDft->res_pred_band_min; b < hStereoDft->nbands; b++ )
2896 : {
2897 23380662 : if ( hStereoDft->attackPresent || hStereoDft->wasTransient )
2898 : {
2899 1219980 : hStereoDft->past_res_pred_gain[( hStereoDft->past_DMX_pos + 1 ) % STEREO_DFT_PAST_MAX][b] = -1;
2900 : }
2901 : else
2902 : {
2903 22160682 : hStereoDft->past_res_pred_gain[( hStereoDft->past_DMX_pos + 1 ) % STEREO_DFT_PAST_MAX][b] = pPredGain[b];
2904 : }
2905 : }
2906 :
2907 2957070 : pop_wmops();
2908 2957070 : return;
2909 : }
2910 :
2911 :
2912 : /*---------------------------------------------------------------
2913 : * stereo_dft_dec_smooth_parameters()
2914 : *
2915 : *
2916 : * ---------------------------------------------------------------*/
2917 :
2918 1495974 : void stereo_dft_dec_smooth_parameters(
2919 : STEREO_DFT_DEC_DATA_HANDLE hStereoDft, /* i/o: decoder DFT stereo handle */
2920 : const int16_t prev_sid_nodata, /* i : Previous SID/No data indicator */
2921 : const int16_t active_frame_counter, /* i : Active frame counter */
2922 : const int32_t element_brate /* i : Element bitrate */
2923 : )
2924 : {
2925 : int16_t k_offset, k, k2, b, N_div;
2926 : float *pIpd, *pInterpol;
2927 : float *pgIpd;
2928 : float *pSideGain;
2929 : float diff_ipd;
2930 : int16_t nbands;
2931 : int16_t max_res_pred_ind;
2932 :
2933 1495974 : N_div = STEREO_DFT_NBDIV;
2934 1495974 : k_offset = STEREO_DFT_OFFSET;
2935 :
2936 1495974 : if ( hStereoDft->frame_sid_nodata || prev_sid_nodata )
2937 : {
2938 44883 : k = 1;
2939 303036 : for ( b = 0; b < hStereoDft->nbands; b++ )
2940 : {
2941 258153 : *( hStereoDft->side_gain + ( ( k + k_offset ) - 1 ) * STEREO_DFT_BAND_MAX + b ) = *( hStereoDft->side_gain + ( k + k_offset ) * STEREO_DFT_BAND_MAX + b );
2942 : }
2943 :
2944 44883 : if ( hStereoDft->frame_sid_nodata )
2945 : {
2946 : /* set new xfade target if new itd received */
2947 42471 : if ( hStereoDft->ipd_xfade_counter < STEREO_DFT_ITD_CNG_XFADE )
2948 : {
2949 41991 : if ( ( hStereoDft->gipd[k + k_offset] - hStereoDft->ipd_xfade_prev ) > EVS_PI )
2950 : {
2951 0 : hStereoDft->ipd_xfade_target = hStereoDft->gipd[k + k_offset] - 2 * EVS_PI;
2952 0 : hStereoDft->ipd_xfade_step = ( hStereoDft->ipd_xfade_target - hStereoDft->ipd_xfade_prev ) / ( STEREO_DFT_ITD_CNG_XFADE - hStereoDft->ipd_xfade_counter );
2953 : }
2954 41991 : else if ( ( hStereoDft->ipd_xfade_prev - hStereoDft->gipd[k + k_offset] ) > EVS_PI )
2955 : {
2956 303 : hStereoDft->ipd_xfade_target = hStereoDft->gipd[k + k_offset] + 2 * EVS_PI;
2957 303 : hStereoDft->ipd_xfade_step = ( hStereoDft->ipd_xfade_target - hStereoDft->ipd_xfade_prev ) / ( STEREO_DFT_ITD_CNG_XFADE - hStereoDft->ipd_xfade_counter );
2958 : }
2959 : else
2960 : {
2961 41688 : hStereoDft->ipd_xfade_target = hStereoDft->gipd[k + k_offset];
2962 41688 : hStereoDft->ipd_xfade_step = ( hStereoDft->ipd_xfade_target - hStereoDft->ipd_xfade_prev ) / ( STEREO_DFT_ITD_CNG_XFADE - hStereoDft->ipd_xfade_counter );
2963 : }
2964 : }
2965 :
2966 : /* xfade */
2967 42471 : if ( hStereoDft->ipd_xfade_prev != hStereoDft->ipd_xfade_target && hStereoDft->ipd_xfade_counter < STEREO_DFT_ITD_CNG_XFADE && hStereoDft->last_active_element_brate <= 24400 )
2968 : {
2969 7857 : hStereoDft->gipd[k + k_offset] = hStereoDft->ipd_xfade_prev + hStereoDft->ipd_xfade_step;
2970 7857 : hStereoDft->ipd_xfade_prev = hStereoDft->gipd[k + k_offset];
2971 7857 : hStereoDft->ipd_xfade_counter++;
2972 : }
2973 : }
2974 : else
2975 : {
2976 : /* First active frame, "reset" everything if long enough active encoding, only triggered if STEREO_DFT_ITD_CNG_XFADE_RESET = -1 */
2977 2412 : if ( active_frame_counter > STEREO_DFT_ITD_CNG_XFADE_RESET )
2978 : {
2979 3 : hStereoDft->ipd_xfade_target = hStereoDft->gipd[k + k_offset];
2980 3 : hStereoDft->ipd_xfade_prev = hStereoDft->gipd[k + k_offset];
2981 3 : hStereoDft->ipd_xfade_counter = 0;
2982 : }
2983 : }
2984 :
2985 89766 : for ( k2 = 1; k2 < hStereoDft->prm_res[k + k_offset]; k2++ )
2986 : {
2987 44883 : hStereoDft->gipd[( k + k_offset ) - k2] = hStereoDft->gipd[k + k_offset];
2988 : }
2989 :
2990 44883 : if ( hStereoDft->frame_sid_nodata )
2991 : {
2992 : /* set new xfade target if new itd received */
2993 42471 : if ( hStereoDft->itd_xfade_counter < STEREO_DFT_ITD_CNG_XFADE )
2994 : {
2995 42228 : hStereoDft->itd_xfade_target = hStereoDft->itd[k + k_offset];
2996 42228 : hStereoDft->itd_xfade_step = ( hStereoDft->itd_xfade_target - hStereoDft->itd_xfade_prev ) / ( STEREO_DFT_ITD_CNG_XFADE - hStereoDft->itd_xfade_counter );
2997 : }
2998 :
2999 : /* xfade */
3000 42471 : if ( hStereoDft->itd_xfade_prev != hStereoDft->itd_xfade_target && hStereoDft->itd_xfade_counter < STEREO_DFT_ITD_CNG_XFADE && hStereoDft->last_active_element_brate <= 24400 )
3001 : {
3002 8973 : hStereoDft->itd[k + k_offset] = hStereoDft->itd_xfade_prev + hStereoDft->itd_xfade_step;
3003 8973 : hStereoDft->itd_xfade_prev = hStereoDft->itd[k + k_offset];
3004 8973 : hStereoDft->itd_xfade_counter++;
3005 : }
3006 : }
3007 : else
3008 : {
3009 : /* First active frame, "reset" everything if long enough active encoding, only triggered if STEREO_DFT_ITD_CNG_XFADE_RESET = -1 */
3010 2412 : if ( active_frame_counter > STEREO_DFT_ITD_CNG_XFADE_RESET )
3011 : {
3012 3 : hStereoDft->itd_xfade_target = hStereoDft->itd[k + k_offset];
3013 3 : hStereoDft->itd_xfade_prev = hStereoDft->itd[k + k_offset];
3014 3 : hStereoDft->itd_xfade_counter = 0;
3015 : }
3016 :
3017 2412 : hStereoDft->last_active_element_brate = element_brate;
3018 : }
3019 89766 : for ( k2 = 1; k2 < hStereoDft->prm_res[k + k_offset]; k2++ )
3020 : {
3021 44883 : hStereoDft->itd[( k + k_offset ) - k2] = hStereoDft->itd[k + k_offset];
3022 : }
3023 :
3024 44883 : return;
3025 : }
3026 :
3027 : /* Active frame, "reset" everything "reset" everything if long enough active encoding */
3028 1451091 : if ( active_frame_counter > STEREO_DFT_ITD_CNG_XFADE_RESET )
3029 : {
3030 1397082 : hStereoDft->itd_xfade_counter = 0;
3031 1397082 : hStereoDft->itd_xfade_target = hStereoDft->itd[STEREO_DFT_NBDIV - 1];
3032 1397082 : hStereoDft->itd_xfade_prev = hStereoDft->itd[STEREO_DFT_NBDIV - 1];
3033 1397082 : hStereoDft->ipd_xfade_counter = 0;
3034 1397082 : hStereoDft->ipd_xfade_target = hStereoDft->gipd[STEREO_DFT_NBDIV - 1];
3035 1397082 : hStereoDft->ipd_xfade_prev = hStereoDft->gipd[STEREO_DFT_NBDIV - 1];
3036 : }
3037 :
3038 1451091 : hStereoDft->last_active_element_brate = element_brate;
3039 :
3040 2902182 : for ( k = hStereoDft->prm_res[k_offset] - 1; k < N_div; k += hStereoDft->prm_res[k + k_offset] )
3041 : {
3042 1451091 : max_res_pred_ind = 0;
3043 :
3044 1451091 : if ( hStereoDft->reverb_flag == 1 )
3045 : {
3046 295371 : nbands = min( 10, hStereoDft->nbands_respred );
3047 :
3048 : /*Shift 2 last bands residual prediction gains for SWB/FB*/
3049 295371 : if ( hStereoDft->band_res[k_offset] == STEREO_DFT_BAND_RES_HIGH )
3050 : {
3051 425856 : for ( b = hStereoDft->nbands_respred - 1; b >= nbands; b-- )
3052 : {
3053 275352 : hStereoDft->res_gains_ind[1][b + STEREO_DFT_BAND_MAX] =
3054 275352 : hStereoDft->res_gains_ind[1][b - STEREO_DFT_RES_PRED_BAND_MIN_RED + hStereoDft->res_pred_band_min + STEREO_DFT_BAND_MAX];
3055 275352 : hStereoDft->res_gains_ind[1][b - STEREO_DFT_RES_PRED_BAND_MIN_RED + hStereoDft->res_pred_band_min + STEREO_DFT_BAND_MAX] = 0;
3056 : }
3057 : }
3058 :
3059 : /* Get maximal index */
3060 1742397 : for ( b = hStereoDft->res_pred_band_min; b < ( nbands - STEREO_DFT_RES_PRED_BAND_MIN_CONST ); b++ )
3061 : {
3062 1447026 : if ( max_res_pred_ind < hStereoDft->res_gains_ind[1][b + STEREO_DFT_BAND_MAX] )
3063 : {
3064 413892 : max_res_pred_ind = (int16_t) hStereoDft->res_gains_ind[1][b + STEREO_DFT_BAND_MAX];
3065 : }
3066 : }
3067 :
3068 : /* predictive values */
3069 1181484 : for ( ; b < nbands; b++ )
3070 : {
3071 886113 : assert( hStereoDft->res_gains_ind[1][b + STEREO_DFT_BAND_MAX] == 0 );
3072 886113 : hStereoDft->res_gains_ind[1][b + STEREO_DFT_BAND_MAX] = max_res_pred_ind;
3073 : }
3074 : }
3075 :
3076 1451091 : for ( b = hStereoDft->res_pred_band_min; b < hStereoDft->res_cod_band_max; b++ )
3077 : {
3078 : float tmp;
3079 : int16_t tmps1, tmps2;
3080 :
3081 0 : hStereoDft->res_gains_ind[0][b] = hStereoDft->res_gains_ind[0][b + STEREO_DFT_BAND_MAX];
3082 : /*stereo_dft_dequantize_res_gains_f(&hStereoDft->res_gains_ind[0][b], &hStereoDft->res_gains_ind[1][b+STEREO_DFT_BAND_MAX],hStereoDft->side_gain+(k+k_offset)*STEREO_DFT_BAND_MAX+b, hStereoDft->res_pred_gain+(k+k_offset)*STEREO_DFT_BAND_MAX+b, 1);*/
3083 0 : tmps1 = (int16_t) ( hStereoDft->res_gains_ind[0][b] );
3084 0 : tmps2 = (int16_t) ( hStereoDft->res_gains_ind[1][b + STEREO_DFT_BAND_MAX] );
3085 0 : stereo_dft_dequantize_res_gains( &tmps1, &tmps2, hStereoDft->side_gain + ( k + k_offset ) * STEREO_DFT_BAND_MAX + b, hStereoDft->res_pred_gain + ( k + k_offset ) * STEREO_DFT_BAND_MAX + b, 1 );
3086 :
3087 0 : if ( hStereoDft->attackPresent )
3088 : {
3089 0 : hStereoDft->res_gains_ind[1][b] = 0.8f * hStereoDft->res_gains_ind[1][b];
3090 : }
3091 0 : else if ( hStereoDft->trans || ( hStereoDft->res_pred_mode[k] && ( hStereoDft->res_gains_ind[1][b + STEREO_DFT_BAND_MAX] < 2.f ) ) )
3092 : {
3093 0 : hStereoDft->res_gains_ind[1][b] = 0.6f * hStereoDft->res_gains_ind[1][b] + 0.4f * hStereoDft->res_gains_ind[1][b + STEREO_DFT_BAND_MAX];
3094 : }
3095 : else
3096 : {
3097 0 : hStereoDft->res_gains_ind[1][b] = dft_alpha_s2[b] * hStereoDft->res_gains_ind[1][b] + ( 1 - dft_alpha_s2[b] ) * hStereoDft->res_gains_ind[1][b + STEREO_DFT_BAND_MAX];
3098 : }
3099 :
3100 0 : stereo_dft_dequantize_res_gains_f( &hStereoDft->res_gains_ind[0][b], &hStereoDft->res_gains_ind[1][b], &tmp, hStereoDft->res_pred_gain + ( k + k_offset ) * STEREO_DFT_BAND_MAX + b, 1 );
3101 : }
3102 :
3103 : /* Smoothing of prediction gains between ftrames */
3104 12609324 : for ( ; b < hStereoDft->nbands; b++ )
3105 : {
3106 11158233 : if ( hStereoDft->attackPresent )
3107 : {
3108 336408 : hStereoDft->res_gains_ind[0][b] = hStereoDft->res_gains_ind[0][b + STEREO_DFT_BAND_MAX];
3109 336408 : hStereoDft->res_gains_ind[1][b] = 0.8f * hStereoDft->res_gains_ind[1][b];
3110 : }
3111 10821825 : else if ( hStereoDft->trans || ( hStereoDft->res_pred_mode[k] && ( hStereoDft->res_gains_ind[1][b + STEREO_DFT_BAND_MAX] < 2.f ) ) )
3112 : {
3113 7032003 : hStereoDft->res_gains_ind[0][b] = hStereoDft->res_gains_ind[0][b + STEREO_DFT_BAND_MAX];
3114 :
3115 7032003 : if ( hStereoDft->hConfig->band_res == STEREO_DFT_BAND_RES_LOW )
3116 : {
3117 1384665 : hStereoDft->res_gains_ind[1][b] = dft_alpha_w_b2[b] * hStereoDft->res_gains_ind[1][b] + ( 1 - dft_alpha_w_b2[b] ) * hStereoDft->res_gains_ind[1][b + STEREO_DFT_BAND_MAX];
3118 : }
3119 : else
3120 : {
3121 5647338 : hStereoDft->res_gains_ind[1][b] = dft_alpha_w[b] * hStereoDft->res_gains_ind[1][b] + ( 1 - dft_alpha_w[b] ) * hStereoDft->res_gains_ind[1][b + STEREO_DFT_BAND_MAX];
3122 : }
3123 : }
3124 : else
3125 : {
3126 3789822 : if ( hStereoDft->hConfig->band_res == STEREO_DFT_BAND_RES_LOW )
3127 : {
3128 804015 : hStereoDft->res_gains_ind[0][b] = dft_alpha_s_b2[b] * hStereoDft->res_gains_ind[0][b] + ( 1 - dft_alpha_s_b2[b] ) * hStereoDft->res_gains_ind[0][b + STEREO_DFT_BAND_MAX];
3129 804015 : hStereoDft->res_gains_ind[1][b] = dft_alpha_s2_b2[b] * hStereoDft->res_gains_ind[1][b] + ( 1 - dft_alpha_s2_b2[b] ) * hStereoDft->res_gains_ind[1][b + STEREO_DFT_BAND_MAX];
3130 : }
3131 : else
3132 : {
3133 2985807 : hStereoDft->res_gains_ind[0][b] = dft_alpha_s[b] * hStereoDft->res_gains_ind[0][b] + ( 1 - dft_alpha_s[b] ) * hStereoDft->res_gains_ind[0][b + STEREO_DFT_BAND_MAX];
3134 2985807 : hStereoDft->res_gains_ind[1][b] = dft_alpha_s2[b] * hStereoDft->res_gains_ind[1][b] + ( 1 - dft_alpha_s2[b] ) * hStereoDft->res_gains_ind[1][b + STEREO_DFT_BAND_MAX];
3135 : }
3136 : }
3137 :
3138 11158233 : if ( !hStereoDft->recovery_flg )
3139 : {
3140 11121489 : stereo_dft_dequantize_res_gains_f( &hStereoDft->res_gains_ind[0][b], &hStereoDft->res_gains_ind[1][b], hStereoDft->side_gain + ( k + k_offset ) * STEREO_DFT_BAND_MAX + b, hStereoDft->res_pred_gain + ( k + k_offset ) * STEREO_DFT_BAND_MAX + b, 1 );
3141 : }
3142 : }
3143 :
3144 : /* Smoothing of IPDs*/
3145 1451091 : pgIpd = hStereoDft->gipd + ( k + k_offset );
3146 1451091 : diff_ipd = pgIpd[0] - pgIpd[-hStereoDft->prm_res[k + k_offset]];
3147 1451091 : if ( diff_ipd < -EVS_PI )
3148 : {
3149 90162 : pgIpd[0] += PI2;
3150 : }
3151 1360929 : else if ( diff_ipd > EVS_PI )
3152 : {
3153 71346 : pgIpd[0] -= PI2;
3154 : }
3155 :
3156 1451091 : if ( !hStereoDft->attackPresent )
3157 : {
3158 1409709 : if ( hStereoDft->wasTransient )
3159 : {
3160 39096 : pgIpd[0] = 0.8f * pgIpd[0] + 0.2f * pgIpd[-hStereoDft->prm_res[k + k_offset]];
3161 : }
3162 : else
3163 : {
3164 1370613 : pgIpd[0] = 0.5f * pgIpd[0] + 0.5f * pgIpd[-hStereoDft->prm_res[k + k_offset]];
3165 : }
3166 : }
3167 :
3168 :
3169 1451091 : if ( !hStereoDft->attackPresent )
3170 : {
3171 1409709 : pSideGain = hStereoDft->side_gain + ( k + k_offset ) * STEREO_DFT_BAND_MAX;
3172 4626459 : for ( b = 0; b < hStereoDft->res_cod_band_max; b++ )
3173 : {
3174 3216750 : pSideGain[b] = dft_res_cod_alpha[b] * pSideGain[b] + ( 1 - dft_res_cod_alpha[b] ) * pSideGain[b - hStereoDft->prm_res[k + k_offset] * STEREO_DFT_BAND_MAX];
3175 : }
3176 : }
3177 :
3178 : /*Interpolation between DFT slots*/
3179 2902182 : for ( k2 = 1; k2 < hStereoDft->prm_res[k + k_offset]; k2++ )
3180 : {
3181 1451091 : pInterpol = hStereoDft->gipd + ( ( k + k_offset ) - k2 );
3182 1451091 : pIpd = hStereoDft->gipd + ( k + k_offset );
3183 1451091 : if ( hStereoDft->attackPresent )
3184 : {
3185 41382 : *( pInterpol ) = *( pIpd );
3186 : }
3187 : else
3188 : {
3189 1409709 : *( pInterpol ) = *( hStereoDft->gipd + ( k + k_offset - hStereoDft->prm_res[k + k_offset] ) );
3190 : }
3191 :
3192 15913599 : for ( b = 0; b < hStereoDft->nbands; b++ )
3193 : {
3194 14462508 : *( hStereoDft->res_pred_gain + ( ( k + k_offset ) - k2 ) * STEREO_DFT_BAND_MAX + b ) = *( hStereoDft->res_pred_gain + ( k + k_offset - hStereoDft->prm_res[k + k_offset] ) * STEREO_DFT_BAND_MAX + b );
3195 :
3196 14462508 : if ( b < hStereoDft->res_cod_band_max || hStereoDft->attackPresent || hStereoDft->trans || ( hStereoDft->res_pred_mode[k] && ( hStereoDft->res_gains_ind[1][b + STEREO_DFT_BAND_MAX] < 2.f ) ) )
3197 : {
3198 10672686 : *( hStereoDft->side_gain + ( ( k + k_offset ) - k2 ) * STEREO_DFT_BAND_MAX + b ) = *( hStereoDft->side_gain + ( k + k_offset ) * STEREO_DFT_BAND_MAX + b );
3199 : }
3200 : else
3201 : {
3202 3789822 : *( hStereoDft->side_gain + ( ( k + k_offset ) - k2 ) * STEREO_DFT_BAND_MAX + b ) = *( hStereoDft->side_gain + ( k + k_offset - hStereoDft->prm_res[k + k_offset] ) * STEREO_DFT_BAND_MAX + b );
3203 : }
3204 : }
3205 :
3206 1451091 : hStereoDft->itd[( k + k_offset ) - k2] = hStereoDft->itd[k + k_offset];
3207 : } /*end of interpolation*/
3208 : }
3209 :
3210 1451091 : return;
3211 : }
3212 :
3213 :
3214 : /*---------------------------------------------------------------
3215 : * stereo_dft_adapt_sf_delay()
3216 : *
3217 : *
3218 : * ---------------------------------------------------------------*/
3219 :
3220 3248022 : static void stereo_dft_adapt_sf_delay(
3221 : STEREO_DFT_DEC_DATA_HANDLE hStereoDft,
3222 : float *pPredGain )
3223 : {
3224 : float var_mean_ratio;
3225 : float new_variation;
3226 : float target_delay;
3227 : float max_pg, sum_pg, alpha_up, alpha_down;
3228 : int16_t b;
3229 :
3230 3248022 : max_pg = 0.0f;
3231 3248022 : sum_pg = 0.0f;
3232 :
3233 : /* find sum and maximum of prediction gains */
3234 30177438 : for ( b = hStereoDft->res_pred_band_min; b < hStereoDft->nbands; b++ )
3235 : {
3236 26929416 : if ( pPredGain[b] > max_pg )
3237 : {
3238 8014617 : max_pg = pPredGain[b];
3239 : }
3240 26929416 : sum_pg += pPredGain[b];
3241 : }
3242 :
3243 3248022 : if ( sum_pg > 0.0f )
3244 : {
3245 : /* Calculate mean of the prediction gain */
3246 2929773 : hStereoDft->lt_pred_gain = STEREO_DFT_LT_PREDGAIN_UPD * sum_pg + ( 1.0f - STEREO_DFT_LT_PREDGAIN_UPD ) * hStereoDft->lt_pred_gain;
3247 :
3248 : /* Calculate the variation of the prediction gain */
3249 2929773 : new_variation = fabsf( sum_pg - hStereoDft->lt_pred_gain );
3250 2929773 : hStereoDft->lt_pred_gain_variation = STEREO_DFT_VR_PREDGAIN_UPD * new_variation + ( 1.0f - STEREO_DFT_VR_PREDGAIN_UPD ) * hStereoDft->lt_pred_gain_variation;
3251 : }
3252 :
3253 : /* Calculate ratio of variation and mean of prediction gain */
3254 3248022 : var_mean_ratio = STEREO_DFT_RES_RATIO_LIMIT;
3255 3248022 : if ( hStereoDft->lt_pred_gain > 0.0f )
3256 : {
3257 3121944 : var_mean_ratio = min( 1.5f * STEREO_DFT_RES_RATIO_LIMIT, hStereoDft->lt_pred_gain_variation / hStereoDft->lt_pred_gain );
3258 : }
3259 :
3260 3248022 : if ( max_pg > STEREO_DFT_STEFFI_PG_THRESHOLD )
3261 : {
3262 : /* slow upwards */
3263 1452501 : alpha_up = STEREO_DFT_STEFFI_RATIO_UP_HIGH;
3264 1452501 : alpha_down = STEREO_DFT_STEFFI_RATIO_DOWN_HIGH;
3265 : }
3266 : else
3267 : {
3268 : /* slow downwards */
3269 1795521 : alpha_up = STEREO_DFT_STEFFI_RATIO_UP_LOW;
3270 1795521 : alpha_down = STEREO_DFT_STEFFI_RATIO_DOWN_LOW;
3271 : }
3272 :
3273 3248022 : if ( var_mean_ratio > hStereoDft->lt_var_mean_ratio )
3274 : {
3275 1150611 : hStereoDft->lt_var_mean_ratio = alpha_up * var_mean_ratio + ( 1.0f - alpha_up ) * hStereoDft->lt_var_mean_ratio;
3276 : }
3277 : else
3278 : {
3279 2097411 : hStereoDft->lt_var_mean_ratio = alpha_down * var_mean_ratio + ( 1.0f - alpha_down ) * hStereoDft->lt_var_mean_ratio;
3280 : }
3281 :
3282 : /* Calculate a target delay for the stereo filling. Set the stereo filling delay lower when the prediction gain
3283 : variation is relatively high compared to the mean */
3284 3248022 : if ( hStereoDft->lt_var_mean_ratio >= STEREO_DFT_RES_RATIO_LIMIT )
3285 : {
3286 1464774 : target_delay = STEREO_DFT_STEFFI_DELAY_SHORT;
3287 : }
3288 : else
3289 : {
3290 1783248 : target_delay = min( STEREO_DFT_STEFFI_DELAY_LONG, STEREO_DFT_STEFFI_DELAY_SHORT + ( STEREO_DFT_STEFFI_DELAY_OFFSET + STEREO_DFT_STEFFI_DELAY_LONG - STEREO_DFT_STEFFI_DELAY_SHORT ) * ( 1.0f - hStereoDft->lt_var_mean_ratio / STEREO_DFT_RES_RATIO_LIMIT ) );
3291 : }
3292 :
3293 : /* Adapt the stereo filling delay by interpolating between two delay taps, one at the shortest delay and one at the longest delay */
3294 3248022 : hStereoDft->stefi_short_gain = ( STEREO_DFT_STEFFI_DELAY_LONG - target_delay ) / ( STEREO_DFT_STEFFI_DELAY_LONG - STEREO_DFT_STEFFI_DELAY_SHORT );
3295 3248022 : hStereoDft->stefi_long_gain = sqrtf( 1.0f - hStereoDft->stefi_short_gain * hStereoDft->stefi_short_gain );
3296 :
3297 : #ifdef DEBUG_MODE_DFT
3298 : dbgwrite( &hStereoDft->lt_pred_gain, sizeof( float ), 1, 1, "res/stereo_dft_lt_pred_gain_b.pcm" );
3299 : dbgwrite( &hStereoDft->lt_pred_gain_variation, sizeof( float ), 1, 1, "res/stereo_dft_lt_pred_gain_variance_b.pcm" );
3300 : dbgwrite( &hStereoDft->lt_var_mean_ratio, sizeof( float ), 1, 1, "res/stereo_dft_lt_var_mean_ratio_b.pcm" );
3301 : dbgwrite( &target_delay, sizeof( float ), 1, 1, "res/stereo_dft_target_delay.pcm" );
3302 : dbgwrite( &hStereoDft->stefi_short_gain, sizeof( float ), 1, 1, "res/stereo_dft_short_gain.pcm" );
3303 : dbgwrite( &hStereoDft->stefi_long_gain, sizeof( float ), 1, 1, "res/stereo_dft_long_gain.pcm" );
3304 : #endif /* DEBUG_MODE_DFT */
3305 :
3306 3248022 : return;
3307 : }
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