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 1238640 : 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 2477280 : for ( i = 0; i < N; i++ )
102 : {
103 : /* Ensure the indices are within range -- may go out of range due to frame loss */
104 1238640 : ind1[i] = check_bounds_s( ind1[i], 0, 30 );
105 1238640 : ind2[i] = check_bounds_s( ind2[i], 0, 7 );
106 1238640 : index = ( ( ind1[i] < 15 ? 15 - ind1[i] : ind1[i] - 15 ) << 3 ) + ind2[i];
107 1238640 : gout[i] = ind1[i] < 15 ? -dft_res_gains_q[index][0] : dft_res_gains_q[index][0];
108 1238640 : rout[i] = dft_res_gains_q[index][1];
109 : }
110 :
111 1238640 : return;
112 : }
113 :
114 : /*---------------------------------------------------------------------------
115 : * stereo_dft_dequantize_res_gains_f()
116 : *
117 : * returns interepolated values for non-integer indices
118 : *---------------------------------------------------------------------------*/
119 :
120 783966 : 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 1567932 : for ( i = 0; i < N; i++ )
131 : {
132 : /* Ensure the indices are within range -- may go out of range due to frame loss */
133 783966 : ind1[i] = check_bounds( ind1[i], 0, 31 );
134 783966 : ind2[i] = check_bounds( ind2[i], 0, 7 );
135 :
136 : /* compensate for the offset and extract/remove sign of first index */
137 783966 : sign = ind1[i] < 15 ? -1 : 1;
138 783966 : i1 = (int16_t) floorf( ind1[i] < 15 ? 15 - ind1[i] : ind1[i] - 15 );
139 783966 : fi = ( ind1[i] < 15 ? 15 - ind1[i] : ind1[i] - 15 ) - i1;
140 :
141 783966 : j1 = (int16_t) floorf( ind2[i] );
142 783966 : fj = ind2[i] - j1;
143 :
144 : /* choose base indices for interpolation */
145 783966 : ji = min( fj < .5 ? j1 : j1 + 1, 7 );
146 783966 : ij = min( fi < .5 ? i1 : i1 + 1, 15 );
147 :
148 : /* interpolate values from table */
149 783966 : if ( i1 < 15 )
150 : {
151 782082 : 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 1884 : gout[i] = sign * dft_res_gains_q[120 + ji][0];
156 : }
157 :
158 783966 : if ( j1 < 7 )
159 : {
160 783933 : 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 33 : rout[i] = dft_res_gains_q[( ij << 3 ) + 7][1];
165 : }
166 : }
167 :
168 783966 : return;
169 : }
170 :
171 :
172 : /*-------------------------------------------------------------------------
173 : * stereo_dft_dequantize_ipd()
174 : *
175 : * Dequantize IPDs
176 : *-------------------------------------------------------------------------*/
177 :
178 12537 : 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 12537 : if ( bits == 2 ) /* 2-bit phase quantization for the highest frequency band only */
188 : {
189 816 : delta = EVS_PI / 2.f;
190 : }
191 11721 : else if ( bits == 3 )
192 : {
193 0 : delta = EVS_PI / 4.f;
194 : }
195 11721 : else if ( bits == 4 )
196 : {
197 11721 : delta = EVS_PI / 8.f;
198 : }
199 : else
200 : {
201 0 : delta = EVS_PI / 4.f;
202 0 : assert( 0 );
203 : }
204 :
205 25074 : for ( i = 0; i < N; i++ )
206 : {
207 12537 : out[i] = ind[i] * delta - EVS_PI;
208 : }
209 :
210 12537 : return;
211 : }
212 :
213 :
214 : /*-------------------------------------------------------------------------
215 : * stereo_dft_dequantize_itd()
216 : *
217 : * Dequantize ITDs
218 : *-------------------------------------------------------------------------*/
219 :
220 87144 : 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 87144 : mask = ( 1 << ( STEREO_DFT_ITD_NBITS - 1 ) ) - 1;
229 87144 : itd = ( ind[0] & mask ) + STEREO_DFT_ITD_MIN;
230 :
231 87144 : if ( ( ind[0] >> ( STEREO_DFT_ITD_NBITS - 1 ) ) )
232 : {
233 56142 : itd *= -1;
234 : }
235 87144 : assert( ( ABSVAL( itd ) <= STEREO_DFT_ITD_MAX ) && ( ABSVAL( itd ) >= STEREO_DFT_ITD_MIN ) );
236 :
237 : /*Convert back @ fs*/
238 87144 : *out = (float) ( itd * output_Fs ) / ( (float) ( STEREO_DFT_ITD_FS ) );
239 :
240 87144 : return;
241 : }
242 :
243 :
244 : /*-------------------------------------------------------------------------
245 : * stereo_dft_dec_create()
246 : *
247 : * Create DFT stereo handle
248 : *------------------------------------------------------------------------*/
249 :
250 2898 : 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 2898 : if ( *hStereoDft != NULL )
262 : {
263 0 : return IVAS_ERROR( IVAS_ERR_INTERNAL_FATAL, "Error: DFT Stereo memory already allocated\n" );
264 : }
265 :
266 2898 : 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 2898 : 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 2898 : 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 2898 : 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 2898 : hStereoDft_loc->hConfig->force_mono_transmission = 0;
287 :
288 2898 : if ( sba_dirac_stereo_flag )
289 : {
290 288 : ivas_sba_dirac_stereo_config( hStereoDft_loc->hConfig );
291 : }
292 : else
293 : {
294 2610 : stereo_dft_config( hStereoDft_loc->hConfig, element_brate, &tmpS, &tmpS );
295 : }
296 :
297 2898 : stereo_dft_dec_open( hStereoDft_loc, output_Fs, nchan_transport );
298 :
299 2898 : *hStereoDft = hStereoDft_loc;
300 :
301 2898 : return IVAS_ERR_OK;
302 : }
303 :
304 :
305 : /*-------------------------------------------------------------------------
306 : * stereo_dft_dec_open()
307 : *
308 : * Open DFT decoder stereo handle
309 : *-------------------------------------------------------------------------*/
310 :
311 2898 : 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 2898 : hStereoDft->N = (int16_t) ( STEREO_DFT_HOP_MAX * output_Fs / 48000 );
319 :
320 : /*Init. DFT sizes*/
321 2898 : hStereoDft->NFFT = (int16_t) ( STEREO_DFT32MS_N_MAX * output_Fs / 48000 );
322 :
323 2898 : hStereoDft->dft_trigo_8k = dft_trigo_32k;
324 2898 : hStereoDft->dft_trigo_12k8 = dft_trigo_12k8;
325 2898 : hStereoDft->dft_trigo_16k = dft_trigo_32k;
326 :
327 2898 : hStereoDft->dft32ms_ovl = (int16_t) ( ( STEREO_DFT32MS_OVL_MAX * output_Fs ) / 48000 );
328 2898 : hStereoDft->win232ms_8k = dft_win232ms_8k;
329 2898 : hStereoDft->win232ms_12k8 = dft_win232ms_12k8;
330 2898 : hStereoDft->win232ms_16k = dft_win232ms_16k;
331 :
332 2898 : hStereoDft->dft32ms_ovl2 = (int16_t) ( ( STEREO_DFT32MS_OVL2_MAX * output_Fs ) / 48000 );
333 2898 : hStereoDft->win32ms_8k = dft_win232ms_8k + 1;
334 2898 : hStereoDft->win32ms_12k8 = dft_win232ms_12k8 + 1;
335 2898 : hStereoDft->win32ms_16k = dft_win232ms_16k + 1;
336 :
337 2898 : if ( output_Fs == 16000 )
338 : {
339 267 : hStereoDft->dft_trigo = dft_trigo_32k;
340 267 : hStereoDft->dft_trigo_step = STEREO_DFT_TRIGO_SRATE_16k_STEP;
341 267 : hStereoDft->win232ms = dft_win232ms_16k;
342 267 : hStereoDft->win32ms = dft_win232ms_16k + 1;
343 : }
344 2631 : else if ( output_Fs == 32000 )
345 : {
346 633 : hStereoDft->dft_trigo = dft_trigo_32k;
347 633 : hStereoDft->dft_trigo_step = STEREO_DFT_TRIGO_SRATE_32k_STEP;
348 633 : hStereoDft->win232ms = dft_win232ms_32k;
349 633 : hStereoDft->win32ms = dft_win232ms_32k + 1;
350 : }
351 : else
352 : {
353 1998 : assert( output_Fs == 48000 );
354 1998 : hStereoDft->dft_trigo = dft_trigo_48k;
355 1998 : hStereoDft->dft_trigo_step = STEREO_DFT_TRIGO_SRATE_48k_STEP;
356 1998 : hStereoDft->win232ms = dft_win232ms_48k;
357 1998 : hStereoDft->win32ms = dft_win232ms_48k + 1;
358 : }
359 :
360 2898 : hStereoDft->win_8k = dft_win_8k;
361 :
362 : /*Bands: find the number of bands, Nyquist freq. is not taken into account*/
363 2898 : set_s( hStereoDft->band_res, hStereoDft->hConfig->band_res, STEREO_DFT_DEC_DFT_NB );
364 :
365 2898 : hStereoDft->nbands = stereo_dft_band_config( hStereoDft->band_limits, hStereoDft->band_res[0], hStereoDft->NFFT, DEC );
366 2898 : hStereoDft->hb_stefi_delay = NS2SA( output_Fs, STEREO_DFT_TD_STEFI_DELAY_NS );
367 :
368 2898 : if ( nchan_transport > 2 )
369 : {
370 132 : hStereoDft->min_smooth_gains = min_smooth_gains2;
371 132 : hStereoDft->max_smooth_gains = max_smooth_gains2;
372 : }
373 : else
374 : {
375 2766 : hStereoDft->min_smooth_gains = min_smooth_gains1;
376 2766 : hStereoDft->max_smooth_gains = max_smooth_gains1;
377 : }
378 :
379 : /* reset DFT stereo memories */
380 2898 : stereo_dft_dec_reset( hStereoDft );
381 :
382 2898 : return;
383 : }
384 :
385 :
386 : /*-------------------------------------------------------------------------
387 : * stereo_dft_dec_reset()
388 : *
389 : * Reset DFT stereo memories
390 : *------------------------------------------------------------------------*/
391 :
392 2898 : 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 2898 : set_s( hStereoDft->prm_res, hStereoDft->hConfig->prm_res, STEREO_DFT_DEC_DFT_NB );
401 :
402 : /* SIDE_GAIN */
403 2898 : set_s( hStereoDft->side_gain_index, 15, STEREO_DFT_BAND_MAX );
404 2898 : set_s( hStereoDft->side_gain_index_previous, 15, STEREO_DFT_BAND_MAX );
405 :
406 : /*residual prediction*/
407 2898 : set_s( hStereoDft->res_pred_mode, hStereoDft->hConfig->res_pred_mode, STEREO_DFT_DEC_DFT_NB );
408 14490 : for ( i = 0; i < STEREO_DFT_PAST_MAX; i++ )
409 : {
410 11592 : set_zero( hStereoDft->DFT_past_DMX[i], STEREO_DFT32MS_N_32k );
411 11592 : set_zero( hStereoDft->past_res_pred_gain[i], STEREO_DFT_BAND_MAX );
412 : }
413 :
414 2898 : hStereoDft->past_DMX_pos = 0;
415 :
416 2898 : set_s( hStereoDft->res_pred_index_previous, 0, STEREO_DFT_BAND_MAX );
417 :
418 40572 : for ( i = 0; i < STEREO_DFT_BAND_MAX; i++ )
419 : {
420 37674 : hStereoDft->res_gains_ind[0][i] = 15.f;
421 : }
422 :
423 2898 : set_zero( hStereoDft->res_gains_ind[1], STEREO_DFT_BAND_MAX );
424 :
425 : /*residual coding*/
426 2898 : set_s( hStereoDft->res_cod_mode, hStereoDft->hConfig->res_cod_mode, STEREO_DFT_DEC_DFT_NB );
427 2898 : hStereoDft->res_cod_band_max = dft_band_res_cod[hStereoDft->hConfig->band_res][hStereoDft->hConfig->res_cod_mode];
428 2898 : set_zero( hStereoDft->res_cod_mem, STEREO_DFT_OVL_8k );
429 :
430 2898 : hStereoDft->res_pred_band_min = max( STEREO_DFT_RES_PRED_BAND_MIN, hStereoDft->res_cod_band_max );
431 :
432 2898 : hStereoDft->stab_fac_smooth_res = 0.f;
433 2898 : bass_psfilter_init( hStereoDft->hBpf );
434 :
435 2898 : tcxltp_dec_init( hStereoDft->hTcxLtpDec, 0, MODE1, IVAS_CPE_DFT, PIT_MAX, 12800 );
436 :
437 2898 : hStereoDft->reverb_flag = 0;
438 :
439 2898 : hStereoDft->bpf_error_signal_last = 0.0f;
440 2898 : hStereoDft->bpf_error_ratio_mem = 1.0f;
441 2898 : hStereoDft->res_hb_nrg_mem = 0.0f;
442 :
443 : /*reset parameters*/
444 2898 : set_zero( hStereoDft->side_gain, STEREO_DFT_DEC_DFT_NB * STEREO_DFT_BAND_MAX );
445 2898 : set_zero( hStereoDft->gipd, STEREO_DFT_DEC_DFT_NB );
446 2898 : set_zero( hStereoDft->itd, STEREO_DFT_DEC_DFT_NB );
447 2898 : set_zero( hStereoDft->res_pred_gain, STEREO_DFT_DEC_DFT_NB * STEREO_DFT_BAND_MAX );
448 :
449 2898 : hStereoDft->wasTransient = 0;
450 2898 : hStereoDft->attackPresent = 0;
451 :
452 2898 : hStereoDft->lt_pred_gain = 0.0f;
453 2898 : hStereoDft->lt_pred_gain_variation = 0.0f;
454 2898 : hStereoDft->lt_var_mean_ratio = STEREO_DFT_RES_RATIO_LIMIT;
455 2898 : hStereoDft->stefi_short_gain = 1.0f;
456 2898 : hStereoDft->stefi_long_gain = 0.0f;
457 :
458 2898 : set_zero( hStereoDft->g_state, STEREO_DFT_BAND_MAX );
459 :
460 2898 : init_basic_allpass( &hStereoDft->ap1, dft_ap_gains[0], dft_ap_delays[0] );
461 2898 : init_basic_allpass( &hStereoDft->ap2, dft_ap_gains[1], dft_ap_delays[1] );
462 2898 : init_basic_allpass( &hStereoDft->ap3, dft_ap_gains[2], dft_ap_delays[2] );
463 :
464 2898 : set_zero( hStereoDft->ap_delay_mem, NS2SA( 16000, DELAY_BWE_TOTAL_NS ) );
465 2898 : set_zero( hStereoDft->ap_fade_mem, STEREO_DFT_ALLPASS_FADELEN_16k );
466 2898 : hStereoDft->ap_wasTransient = 0;
467 2898 : set_zero( hStereoDft->smooth_dmx_nrg, STEREO_DFT_BAND_MAX );
468 2898 : set_zero( hStereoDft->smooth_res_nrg, STEREO_DFT_BAND_MAX );
469 :
470 2898 : set_s( hStereoDft->core_hist, ACELP_CORE, STEREO_DFT_CORE_HIST_MAX );
471 :
472 2898 : set_zero( hStereoDft->hb_stefi_sig, L_FRAME48k + NS2SA( 48000, STEREO_DFT_TD_STEFI_DELAY_NS ) );
473 2898 : set_zero( hStereoDft->hb_nrg, STEREO_DFT_CORE_HIST_MAX );
474 2898 : set_zero( hStereoDft->td_gain, STEREO_DFT_CORE_HIST_MAX );
475 :
476 : /* PLC parameters */
477 2898 : set_zero( hStereoDft->res_mem, STEREO_DFT_RES_BW_MAX );
478 2898 : hStereoDft->time_offs = 0;
479 2898 : hStereoDft->past_dmx_nrg = 0;
480 2898 : hStereoDft->sg_mean = 0.0f;
481 2898 : hStereoDft->sg_mem_corrupt = 0;
482 2898 : hStereoDft->recovery_flg = 0;
483 :
484 37674 : for ( i = 0; i < SBA_DIRAC_STEREO_NUM_BANDS; i++ )
485 : {
486 34776 : set_zero( hStereoDft->smooth_buf[i], SBA_DIRAC_NRG_SMOOTH_LONG + 1 );
487 : }
488 2898 : set_zero( hStereoDft->smooth_fac[0], SBA_DIRAC_STEREO_NUM_BANDS );
489 2898 : set_zero( hStereoDft->smooth_fac[1], SBA_DIRAC_STEREO_NUM_BANDS );
490 :
491 2898 : hStereoDft->itd_xfade_target = 0.0f;
492 2898 : hStereoDft->itd_xfade_step = 0.0f;
493 2898 : hStereoDft->itd_xfade_counter = 0;
494 2898 : hStereoDft->itd_xfade_prev = 0.0f;
495 2898 : hStereoDft->last_active_element_brate = 0;
496 2898 : hStereoDft->ipd_xfade_target = 0.0f;
497 2898 : hStereoDft->ipd_xfade_step = 0.0f;
498 2898 : hStereoDft->ipd_xfade_counter = 0;
499 2898 : hStereoDft->ipd_xfade_prev = 0.0f;
500 :
501 32058 : for ( b = 0; b < hStereoDft->nbands; b++ )
502 : {
503 87480 : for ( i = 0; i < 2; i++ )
504 : {
505 291600 : for ( j = 0; j < 4; j++ )
506 : {
507 233280 : hStereoDft->mixer_mat_smooth[i][j][b] = 0.0f;
508 : }
509 : }
510 : }
511 2898 : hStereoDft->first_frame = 1;
512 2898 : hStereoDft->g_L_prev = 0.f;
513 2898 : hStereoDft->g_R_prev = 0.f;
514 :
515 2898 : return;
516 : }
517 :
518 :
519 : /*-------------------------------------------------------------------------
520 : * stereo_dft_dec_update()
521 : *
522 : * Update DFT memories for new frame
523 : *-------------------------------------------------------------------------*/
524 :
525 207003 : 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 207003 : k_offset = STEREO_DFT_OFFSET; /*Add an offset*/
535 :
536 : /* Update parameters */
537 2898042 : for ( i = 0; i < k_offset * STEREO_DFT_BAND_MAX; i++ )
538 : {
539 2691039 : hStereoDft->side_gain[i] = hStereoDft->side_gain[STEREO_DFT_NBDIV * STEREO_DFT_BAND_MAX + i];
540 2691039 : hStereoDft->res_pred_gain[i] = hStereoDft->res_pred_gain[STEREO_DFT_NBDIV * STEREO_DFT_BAND_MAX + i];
541 : }
542 :
543 414006 : for ( i = 0; i < k_offset; i++ )
544 : {
545 207003 : hStereoDft->gipd[i] = hStereoDft->gipd[STEREO_DFT_NBDIV + i];
546 : }
547 :
548 : /* Update configuration memories */
549 414006 : for ( i = 0; i < k_offset; i++ )
550 : {
551 207003 : hStereoDft->band_res[i] = hStereoDft->band_res[i + STEREO_DFT_NBDIV];
552 207003 : hStereoDft->prm_res[i] = hStereoDft->prm_res[i + STEREO_DFT_NBDIV];
553 207003 : hStereoDft->itd[i] = hStereoDft->itd[STEREO_DFT_NBDIV + i];
554 207003 : hStereoDft->res_cod_mode[i] = hStereoDft->res_cod_mode[i + STEREO_DFT_NBDIV];
555 207003 : hStereoDft->res_pred_mode[i] = hStereoDft->res_pred_mode[i + STEREO_DFT_NBDIV];
556 : }
557 :
558 : /* Load new configurations */
559 207003 : set_s( hStereoDft->band_res + k_offset, hStereoDft->hConfig->band_res, STEREO_DFT_NBDIV );
560 207003 : set_s( hStereoDft->prm_res + k_offset, hStereoDft->hConfig->prm_res, STEREO_DFT_NBDIV );
561 207003 : set_s( hStereoDft->res_pred_mode + k_offset, hStereoDft->hConfig->res_pred_mode, STEREO_DFT_NBDIV );
562 207003 : set_s( hStereoDft->res_cod_mode + k_offset, hStereoDft->hConfig->res_cod_mode, STEREO_DFT_NBDIV );
563 :
564 : /*Update attack info*/
565 207003 : if ( hStereoDft->attackPresent )
566 : {
567 4788 : hStereoDft->wasTransient = 1;
568 : }
569 202215 : else if ( hStereoDft->wasTransient )
570 : {
571 4122 : hStereoDft->wasTransient = 0;
572 : }
573 :
574 621009 : for ( i = STEREO_DFT_CORE_HIST_MAX - 1; i > 0; i-- )
575 : {
576 414006 : hStereoDft->core_hist[i] = hStereoDft->core_hist[i - 1];
577 : }
578 :
579 207003 : mvr2r( hStereoDft->hb_stefi_sig + output_frame, hStereoDft->hb_stefi_sig, hStereoDft->hb_stefi_delay );
580 207003 : mvr2r( hStereoDft->hb_nrg, hStereoDft->hb_nrg + 1, STEREO_DFT_CORE_HIST_MAX - 1 );
581 207003 : mvr2r( hStereoDft->td_gain, hStereoDft->td_gain + 1, STEREO_DFT_CORE_HIST_MAX - 1 );
582 :
583 207003 : if ( sba_dirac_stereo_flag )
584 : {
585 : /* buffer update, push back by 2 because of 2 subframes */
586 377994 : for ( b = 0; b < hStereoDft->nbands; b++ )
587 : {
588 3456300 : for ( i = SBA_DIRAC_NRG_SMOOTH_LONG; i > 1; i-- )
589 : {
590 3110670 : hStereoDft->smooth_buf[b][i] = hStereoDft->smooth_buf[b][i - 2];
591 : }
592 : }
593 : }
594 :
595 207003 : return;
596 : }
597 :
598 :
599 : /*-------------------------------------------------------------------------
600 : * stereo_dft_dec_destroy()
601 : *
602 : * destroy DFT stereo handle
603 : *-------------------------------------------------------------------------*/
604 :
605 2898 : 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 2898 : hStereoDft = *hStereoDft_glob;
612 :
613 2898 : if ( hStereoDft->hConfig != NULL )
614 : {
615 2898 : free( hStereoDft->hConfig );
616 2898 : hStereoDft->hConfig = NULL;
617 : }
618 :
619 2898 : if ( hStereoDft->hBpf != NULL )
620 : {
621 2898 : free( hStereoDft->hBpf );
622 2898 : hStereoDft->hBpf = NULL;
623 : }
624 :
625 2898 : if ( hStereoDft->hTcxLtpDec != NULL )
626 : {
627 2898 : free( hStereoDft->hTcxLtpDec );
628 2898 : hStereoDft->hTcxLtpDec = NULL;
629 : }
630 :
631 2898 : free( hStereoDft );
632 2898 : hStereoDft = NULL;
633 :
634 2898 : return;
635 : }
636 :
637 :
638 : /*-------------------------------------------------------------------------
639 : * stereo_dft_dec_analyze()
640 : *
641 : * DFT analysis on a 20ms frame
642 : *-------------------------------------------------------------------------*/
643 :
644 592923 : 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 592923 : push_wmops( "DFT_analysis" );
676 :
677 592923 : hStereoDft = hCPE->hStereoDft;
678 :
679 592923 : assert( output_frame == STEREO_DFT_NBDIV * hStereoDft->N );
680 :
681 : /*-----------------------------------------------------------------*
682 : * Initialization
683 : *-----------------------------------------------------------------*/
684 :
685 592923 : if ( input_frame == output_frame )
686 : {
687 219135 : trigo = hStereoDft->dft_trigo;
688 219135 : trigo_step = hStereoDft->dft_trigo_step * STEREO_DFT_TRIGO_DEC_STEP;
689 219135 : win_right = hStereoDft->win32ms;
690 219135 : win_left = hStereoDft->win32ms;
691 219135 : win2 = hStereoDft->win232ms;
692 :
693 219135 : if ( ana_type == DFT_STEREO_DEC_ANA_BPF )
694 : {
695 15369 : assert( ( chan == 0 ) && "DFT stereo: BPF memory only for M channel" );
696 15369 : mem = hCPE->input_mem_BPF[chan];
697 : }
698 203766 : else if ( ana_type == DFT_STEREO_DEC_ANA_LB || ana_type == DFT_STEREO_DEC_ANA_LB_ADD )
699 : {
700 10266 : mem = hCPE->input_mem_LB[chan];
701 : }
702 : else
703 : {
704 193500 : mem = hCPE->input_mem[chan];
705 : }
706 : }
707 373788 : else if ( input_frame == L_FRAME )
708 : {
709 180867 : trigo = hStereoDft->dft_trigo_12k8;
710 180867 : trigo_step = STEREO_DFT_TRIGO_SRATE_12k8_STEP * STEREO_DFT_TRIGO_DEC_STEP;
711 180867 : win_right = hStereoDft->win32ms_12k8;
712 180867 : win_left = hStereoDft->win32ms_12k8;
713 180867 : win2 = hStereoDft->win232ms_12k8;
714 :
715 180867 : if ( ana_type == DFT_STEREO_DEC_ANA_BPF )
716 : {
717 64209 : assert( ( chan == 0 ) && "DFT stereo: BPF memory only for M channel" );
718 64209 : mem = hCPE->input_mem_BPF[chan];
719 : }
720 116658 : else if ( ana_type == DFT_STEREO_DEC_ANA_LB || ana_type == DFT_STEREO_DEC_ANA_LB_ADD )
721 : {
722 56373 : mem = hCPE->input_mem_LB[chan];
723 : }
724 : else
725 : {
726 60285 : assert( ( chan == 1 ) && "12.8kHz sampling rate only for second channel, i.e. residual coding or allpass signal" );
727 60285 : mem = hCPE->input_mem[chan];
728 : }
729 : }
730 192921 : else if ( input_frame == L_FRAME16k )
731 : {
732 142752 : trigo = hStereoDft->dft_trigo_16k;
733 142752 : trigo_step = STEREO_DFT_TRIGO_SRATE_16k_STEP * STEREO_DFT_TRIGO_DEC_STEP;
734 142752 : win_right = hStereoDft->win32ms_16k;
735 142752 : win_left = hStereoDft->win32ms_16k;
736 142752 : win2 = hStereoDft->win232ms_16k;
737 :
738 142752 : if ( ana_type == DFT_STEREO_DEC_ANA_BPF )
739 : {
740 67674 : assert( ( chan == 0 ) && "DFT stereo: BPF memory only for M channel" );
741 67674 : mem = hCPE->input_mem_BPF[chan];
742 : }
743 75078 : else if ( ana_type == DFT_STEREO_DEC_ANA_LB || ana_type == DFT_STEREO_DEC_ANA_LB_ADD )
744 : {
745 45054 : mem = hCPE->input_mem_LB[chan];
746 : }
747 : else
748 : {
749 30024 : assert( ( chan == 1 ) && hCPE->hStereoDft->hConfig->res_pred_mode == STEREO_DFT_RESPRED_ESF && "16kHz sampling rate only for second channel with allpass signal" );
750 30024 : mem = hCPE->input_mem[chan];
751 : }
752 : }
753 50169 : else if ( input_frame == L_FRAME8k )
754 : {
755 50169 : assert( ( chan == 1 ) && "DFT stereo: 8kHz analysis only for residual coding" );
756 50169 : trigo = hStereoDft->dft_trigo_8k;
757 50169 : trigo_step = STEREO_DFT_TRIGO_SRATE_8k_STEP * STEREO_DFT_TRIGO_DEC_STEP;
758 50169 : win_right = hStereoDft->win32ms_8k;
759 50169 : win_left = hStereoDft->win32ms_8k;
760 50169 : win2 = hStereoDft->win232ms_8k;
761 50169 : 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 592923 : inputFs = input_frame * FRAMES_PER_SEC;
775 592923 : delay_dec = NS2SA( inputFs, STEREO_DFT32MS_OVL_NS );
776 592923 : zp = NS2SA( inputFs, STEREO_DFT32MS_ZP_NS );
777 592923 : ovl = NS2SA( inputFs, STEREO_DFT32MS_OVL_NS );
778 : #ifdef DEBUG_MODE_DFT
779 : N = NS2SA( inputFs, STEREO_DFT32MS_HOP_NS );
780 : #endif
781 592923 : NFFT = NS2SA( inputFs, STEREO_DFT32MS_N_NS );
782 592923 : fac = (float) ( hStereoDft->NFFT ) / (float) ( NFFT );
783 592923 : ovl2 = NS2SA( inputFs, STEREO_DFT32MS_OVL2_NS );
784 :
785 : /* Offset for the time buffers */
786 592923 : 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 592923 : mem_size = delay_dec + delay;
788 :
789 : /* Update buffers */
790 592923 : mvr2r( mem, input_buff, mem_size );
791 592923 : mvr2r( input, input_buff + mem_size, input_frame );
792 592923 : mvr2r( input_buff + input_frame, mem, mem_size );
793 592923 : pInput_buff = input_buff;
794 :
795 592923 : if ( hCPE->nchan_out == 1 && hCPE->hStereoDft->hConfig->res_cod_mode == STEREO_DFT_RES_COD_OFF )
796 : {
797 120840 : pop_wmops();
798 120840 : 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 472083 : assert( k_offset <= STEREO_DFT_NBDIV );
840 :
841 49319067 : for ( i = 0; i < NFFT / 4; i++ )
842 : {
843 48846984 : trigo_dec[i] = trigo[i * trigo_step];
844 48846984 : trigo_dec[NFFT / 2 - i] = trigo[i * trigo_step];
845 : }
846 472083 : trigo_dec[NFFT / 4] = trigo[NFFT / 4 * trigo_step];
847 :
848 1202253 : for ( k = 0; k < STEREO_DFT_NBDIV - k_offset; k++ )
849 : {
850 730170 : set_f( DFT, 0, STEREO_DFT32MS_N_MAX );
851 730170 : if ( k == 0 )
852 : {
853 367986 : offset = 0;
854 : }
855 : else
856 : {
857 : /* If OVL2 = OVL offset = 10ms */
858 362184 : offset = NS2SA( inputFs, STEREO_DFT32MS_WIN_CENTER_NS - STEREO_DFT32MS_OVL2_NS / 2 );
859 : }
860 :
861 730170 : pInput = pInput_buff + offset;
862 730170 : pDFT_out = out_DFT[chan] + k * STEREO_DFT32MS_N_MAX;
863 :
864 : /*Forwards FFT: L and R*/
865 : /* Zero Padding & Flat Portion */
866 730170 : mvr2r( pInput, DFT + zp, NFFT - 2 * zp );
867 :
868 : /* Overlapping portions */
869 730170 : if ( k == 0 )
870 : {
871 22102371 : for ( i = 0; i < ovl; i++ )
872 : {
873 21734385 : DFT[i + zp] *= win_left[STEREO_DFT32MS_STEP * i];
874 : }
875 65571141 : for ( i = 0; i < ovl2; i++ )
876 : {
877 65203155 : DFT[NFFT - zp - 1 - i] *= win2[i];
878 : }
879 : }
880 : else
881 : {
882 64212189 : for ( i = 0; i < ovl2; i++ )
883 : {
884 63850005 : DFT[i + zp] *= win2[i];
885 : }
886 21645519 : for ( i = 0; i < ovl; i++ )
887 : {
888 21283335 : DFT[NFFT - zp - i - 1] *= win_right[STEREO_DFT32MS_STEP * i];
889 : }
890 : }
891 :
892 730170 : rfft( DFT, trigo_dec, NFFT, -1 );
893 :
894 : /*Resampling: filtering+scaling*/
895 730170 : if ( ana_type == DFT_STEREO_DEC_ANA_FB || ana_type == DFT_STEREO_DEC_ANA_LB || ana_type == DFT_STEREO_DEC_ANA_NOCORE )
896 : {
897 570996 : pDFT_out[0] = DFT[0] * fac; /*DC*/
898 570996 : if ( NFFT == hStereoDft->NFFT ) /*Nyquist*/
899 : {
900 191562 : pDFT_out[1] = DFT[1] * fac;
901 : }
902 : else
903 : {
904 379434 : pDFT_out[1] = 0.f;
905 : }
906 226209228 : for ( i = 2; i < NFFT; i++ )
907 : {
908 225638232 : pDFT_out[i] = DFT[i] * fac;
909 : }
910 168289332 : for ( i = NFFT; i < hStereoDft->NFFT; i++ )
911 : {
912 167718336 : pDFT_out[i] = 0.f;
913 : }
914 : }
915 159174 : else if ( ana_type == DFT_STEREO_DEC_ANA_BPF )
916 : {
917 152826 : pDFT_out[0] -= DFT[0] * fac * dft_bpf_weights[0];
918 :
919 6113040 : for ( i = 1; i < STEREO_DFT_BPF_SIZE; i++ )
920 : {
921 5960214 : pDFT_out[2 * i] -= DFT[2 * i] * fac * dft_bpf_weights[i];
922 5960214 : pDFT_out[2 * i + 1] -= DFT[2 * i + 1] * fac * dft_bpf_weights[i];
923 : }
924 : }
925 6348 : else if ( ana_type == DFT_STEREO_DEC_ANA_HB_ADD )
926 : {
927 258 : NFFT_core = NS2SA( hCPE->hCoreCoder[0]->L_frame * FRAMES_PER_SEC, STEREO_DFT32MS_N_NS );
928 :
929 147522 : for ( i = NFFT_core; i < NFFT; i++ )
930 : {
931 147264 : pDFT_out[i] += DFT[i] * fac;
932 : }
933 : }
934 : else
935 : {
936 6090 : pDFT_out[0] += DFT[0] * fac; /*DC*/
937 6090 : if ( NFFT == hStereoDft->NFFT ) /*Nyquist*/
938 : {
939 3360 : pDFT_out[1] += DFT[1] * fac;
940 : }
941 3181110 : for ( i = 2; i < NFFT; i++ )
942 : {
943 3175020 : pDFT_out[i] += DFT[i] * fac;
944 : }
945 : }
946 : }
947 :
948 472083 : pop_wmops();
949 472083 : return;
950 : }
951 :
952 : /*-------------------------------------------------------------------------
953 : * stereo_dft_dec_synthesize()
954 : *
955 : * Inverse DFT on a 20ms frame
956 : *-------------------------------------------------------------------------*/
957 :
958 302310 : 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 302310 : push_wmops( "DFT_synthesis" );
979 :
980 : /*-----------------------------------------------------------------*
981 : * Initialization
982 : *-----------------------------------------------------------------*/
983 :
984 302310 : hStereoDft = hCPE->hStereoDft;
985 :
986 302310 : outputFs = output_frame * FRAMES_PER_SEC;
987 :
988 302310 : zp = NS2SA( outputFs, STEREO_DFT32MS_ZP_NS );
989 302310 : ovl = NS2SA( outputFs, STEREO_DFT32MS_OVL_NS );
990 302310 : win = hStereoDft->win32ms;
991 302310 : NFFT = NS2SA( outputFs, STEREO_DFT32MS_N_NS );
992 302310 : ovl2 = NS2SA( outputFs, STEREO_DFT32MS_OVL2_NS );
993 302310 : flat_portion_end = NS2SA( outputFs, STEREO_DFT32MS_WIN_CENTER_NS - STEREO_DFT32MS_OVL2_NS / 2 );
994 302310 : win2 = hStereoDft->win232ms;
995 :
996 302310 : p_DFT = DFT[chan];
997 302310 : set_f( output, 0, NS2SA( outputFs, FRAME_SIZE_NS ) );
998 :
999 : /* deactivating the spectrum scrambling on active speech */
1000 302310 : 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 177384 : hCPE->stereo_switching_counter = 10;
1003 : }
1004 :
1005 302310 : if ( hCPE->stereo_switching_counter == 0 )
1006 : {
1007 : /* Set the level of dispersion */
1008 0 : 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 302310 : moffset = max( 0, 6 - hCPE->NbFrameMod );
1011 :
1012 : /*-----------------------------------------------------------------*
1013 : * Synthesis
1014 : *-----------------------------------------------------------------*/
1015 :
1016 302310 : trigo_step = hStereoDft->dft_trigo_step * STEREO_DFT_TRIGO_DEC_STEP;
1017 51507990 : for ( i = 0; i < NFFT / 4; i++ )
1018 : {
1019 51205680 : trigo_dec[i] = hStereoDft->dft_trigo[i * trigo_step];
1020 51205680 : trigo_dec[NFFT / 2 - i] = hStereoDft->dft_trigo[i * trigo_step];
1021 : }
1022 302310 : trigo_dec[NFFT / 4] = hStereoDft->dft_trigo[NFFT / 4 * trigo_step];
1023 :
1024 906930 : for ( k = 0; k < STEREO_DFT_NBDIV; k++ )
1025 : {
1026 : /* scrambling the spectrum */
1027 604620 : if ( hCPE->stereo_switching_counter <= 6 && chan == 1 && ( hCPE->lt_es_em > -0.4f || hCPE->NbFrameMod > 4 ) )
1028 : {
1029 0 : for ( i = 3; i < NFFT - moffset - 1; i++ )
1030 : {
1031 0 : p_DFT[i] = -p_DFT[i + moffset + 1];
1032 : }
1033 : }
1034 604620 : else if ( hCPE->stereo_switching_counter < 7 && ( hCPE->lt_es_em > 0.2f || hCPE->NbFrameMod > 4 ) )
1035 : {
1036 0 : for ( i = 16 - hCPE->NbFrameMod; i < NFFT - moffset - 1; i++ )
1037 : {
1038 0 : p_DFT[i - 2] = -p_DFT[i + moffset + 1];
1039 : }
1040 : }
1041 :
1042 : /*IFFT*/
1043 604620 : rfft( p_DFT, trigo_dec, NFFT, +1 );
1044 :
1045 604620 : if ( k == 0 )
1046 : {
1047 302310 : offset = 0;
1048 :
1049 : /* Left OLA - 3.125ms */
1050 32305860 : for ( i = 0; i < ovl; i++ )
1051 : {
1052 32003550 : output[offset + i] = hCPE->output_mem[chan][i] + p_DFT[zp + i] * win[STEREO_DFT32MS_STEP * i];
1053 : }
1054 : /* Flat Portion */
1055 38706570 : for ( i = ovl; i < flat_portion_end; i++ )
1056 : {
1057 38404260 : output[offset + i] = p_DFT[zp + i];
1058 : }
1059 : /* Right OLA */
1060 96312960 : for ( i = 0; i < ovl2; i++ )
1061 : {
1062 96010650 : 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 302310 : offset = flat_portion_end;
1069 :
1070 : /* Left OLA */
1071 96312960 : for ( i = 0; i < ovl2; i++ )
1072 : {
1073 96010650 : output[offset + i] = ola_buff[i] + p_DFT[zp + i] * win2[i];
1074 : }
1075 : /* Flat Portion */
1076 38706570 : for ( i = ovl2; i < NFFT - 2 * zp - ovl; i++ )
1077 : {
1078 38404260 : output[offset + i] = p_DFT[zp + i];
1079 : }
1080 : /* Right OLA - 3.125ms */
1081 32305860 : for ( i = 0; i < ovl; i++ )
1082 : {
1083 32003550 : hCPE->output_mem[chan][i] = win[STEREO_DFT32MS_STEP * ( ovl - 1 - i )] * p_DFT[NFFT - zp - ovl + i];
1084 : }
1085 : }
1086 :
1087 604620 : 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 302310 : pop_wmops();
1105 302310 : return;
1106 : }
1107 :
1108 :
1109 : /*-------------------------------------------------------------------------
1110 : * stereo_dft_dec()
1111 : *
1112 : * DFT-based stereo main processing function
1113 : *-------------------------------------------------------------------------*/
1114 :
1115 144057 : 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 144057 : HANDLE_FD_CNG_DEC hFdCngDec = st0->hFdCngDec;
1156 144057 : HANDLE_FD_CNG_COM hFdCngCom = hFdCngDec->hFdCngCom;
1157 144057 : int16_t *cna_seed = &( hFdCngCom->seed );
1158 : float DFT_W, DFT_Y;
1159 :
1160 144057 : output_frame = (int16_t) ( st0->output_Fs / FRAMES_PER_SEC );
1161 :
1162 : /*------------------------------------------------------------------*
1163 : * Initialization
1164 : *-----------------------------------------------------------------*/
1165 :
1166 144057 : samp_ratio = (float) st0->sr_core / (float) st0->output_Fs;
1167 :
1168 144057 : stop = STEREO_DFT32MS_N_32k / 2;
1169 :
1170 : /* Analyze nature of current frame */
1171 134403 : 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 278460 : ( 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 144057 : k_offset = 1;
1187 144057 : N_div = STEREO_DFT_NBDIV;
1188 144057 : 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 144057 : if ( output_frame < inner_frame_tbl[st0->bwidth] && !sba_dirac_stereo_flag )
1192 : {
1193 20334 : hStereoDft->nbands = stereo_dft_band_config( hStereoDft->band_limits, hStereoDft->band_res[k_offset], hStereoDft->NFFT, DEC );
1194 : }
1195 :
1196 144057 : if ( !st0->bfi )
1197 : {
1198 : /* Smoothing for the current frame */
1199 141225 : if ( sba_dirac_stereo_flag )
1200 : {
1201 32043 : ivas_sba_dirac_stereo_smooth_parameters( hStereoDft, hMdDec, cross_fade_start_offset, output_Fs, num_md_sub_frames );
1202 : }
1203 : else
1204 : {
1205 109182 : stereo_dft_dec_smooth_parameters( hStereoDft, hStereoCng->prev_sid_nodata, hStereoCng->active_frame_counter, st0->element_brate );
1206 : }
1207 : }
1208 :
1209 144057 : dmx_nrg = 0.0f;
1210 144057 : if ( prev_bfi )
1211 : {
1212 2778 : 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 432171 : for ( k = 0; k < N_div; k++ )
1223 : {
1224 288114 : pDFT_DMX = DFT[0] + k * STEREO_DFT32MS_N_MAX;
1225 288114 : pDFT_RES = DFT[1] + k * STEREO_DFT32MS_N_MAX;
1226 288114 : pDFT_DMX1 = 0;
1227 288114 : if ( nchan_transport > 1 )
1228 : {
1229 37656 : pDFT_DMX1 = DFT[1] + k * STEREO_DFT32MS_N_MAX;
1230 : }
1231 :
1232 : /*Apply Stereo*/
1233 288114 : if ( hStereoDft->hConfig->dmx_active )
1234 : {
1235 288114 : g = 1.f;
1236 288114 : c0 = 1.f;
1237 288114 : s0 = 0.f;
1238 :
1239 : /* since delay is just 3.125ms, the parameters received are used for the second window */
1240 288114 : pSideGain = hStereoDft->side_gain + ( k + k_offset ) * STEREO_DFT_BAND_MAX;
1241 288114 : pgIpd = hStereoDft->gipd + ( k + k_offset );
1242 288114 : 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 288114 : if ( hStereoDft->frame_sid_nodata && !sba_dirac_stereo_flag )
1263 : {
1264 32610 : NFFT_inner = STEREO_DFT32MS_N_MAX * inner_frame_tbl[st0->bwidth] / L_FRAME48k;
1265 32610 : hStereoDft->nbands = stereo_dft_band_config( hStereoDft->band_limits, 2, NFFT_inner, DEC );
1266 : }
1267 :
1268 :
1269 288114 : if ( st0->bfi )
1270 : {
1271 5664 : hStereoDft->past_DMX_pos = ( hStereoDft->past_DMX_pos + STEREO_DFT_PAST_MAX - 1 ) % STEREO_DFT_PAST_MAX;
1272 : }
1273 :
1274 288114 : if ( !( sba_dirac_stereo_flag && nchan_transport >= 2 ) )
1275 : {
1276 250458 : 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 288114 : if ( hStereoDft->res_cod_band_max > 0 )
1280 : {
1281 72402 : if ( !st0->bfi )
1282 : {
1283 69876 : if ( k == 1 )
1284 : {
1285 34938 : mvr2r( pDFT_RES, hStereoDft->res_mem, 2 * hStereoDft->band_limits[hStereoDft->res_cod_band_max] );
1286 34938 : hStereoDft->time_offs = 0;
1287 : }
1288 : }
1289 : else
1290 : {
1291 2526 : 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 288114 : if ( hStereoDft->frame_sid_nodata && !sba_dirac_stereo_flag )
1309 : {
1310 32610 : DFT_L[0] = pDFT_DMX[0];
1311 32610 : DFT_R[0] = pDFT_RES[0];
1312 : }
1313 : else
1314 : {
1315 255504 : DFT_L[0] = pDFT_DMX[0];
1316 255504 : DFT_R[0] = pDFT_DMX[0];
1317 : }
1318 :
1319 288114 : if ( hStereoDft->frame_sid_nodata || st0->VAD == 0 )
1320 : {
1321 72618 : hFdCngDec->cna_nbands = 0;
1322 : }
1323 :
1324 2946234 : for ( b = 0; b < hStereoDft->nbands; b++ )
1325 : {
1326 2658120 : g = pSideGain[b];
1327 2658120 : if ( hStereoDft->frame_sid_nodata && !sba_dirac_stereo_flag )
1328 : {
1329 190530 : g = hStereoDft->g_state[b];
1330 : }
1331 :
1332 : /* store side gains from inactive frames for later use by the stereo CNA */
1333 2658120 : if ( hStereoDft->band_limits[b] < L_FRAME16k && ( hStereoDft->frame_sid_nodata || st0->VAD == 0 ) )
1334 : {
1335 616026 : hFdCngDec->cna_nbands = b + 1;
1336 616026 : hFdCngDec->cna_band_limits[b] = hStereoDft->band_limits[b];
1337 616026 : 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 2658120 : 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 58394496 : for ( i = hStereoDft->band_limits[b]; i < hStereoDft->band_limits[b + 1]; i++ )
1351 : {
1352 56944836 : pDFT_RES[2 * i] = 0.f;
1353 56944836 : pDFT_RES[2 * i + 1] = 0.f;
1354 : }
1355 : }
1356 :
1357 2658120 : 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 190530 : hFdCngDec->cna_cm[b] = hStereoCng->cm[b];
1362 :
1363 : /* Calculate gamma */
1364 190530 : if ( hStereoCng->cm[b] < 0.9f )
1365 : {
1366 190530 : gamma = hStereoCng->cm[b];
1367 190530 : gamma = gamma / ( 1 - gamma );
1368 190530 : gamma = sqrtf( gamma + 1 - g * g ) - sqrtf( gamma );
1369 : }
1370 : else
1371 : {
1372 0 : gamma = 0;
1373 : }
1374 :
1375 9772320 : 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 9581790 : DFT_L[2 * i] = ( 1 + g ) * pDFT_DMX[2 * i] + gamma * pDFT_RES[2 * i];
1379 9581790 : DFT_R[2 * i] = ( 1 - g ) * pDFT_DMX[2 * i] - gamma * pDFT_RES[2 * i];
1380 :
1381 9581790 : DFT_L[2 * i + 1] = ( 1 + g ) * pDFT_DMX[2 * i + 1] + gamma * pDFT_RES[2 * i + 1];
1382 9581790 : DFT_R[2 * i + 1] = ( 1 - g ) * pDFT_DMX[2 * i + 1] - gamma * pDFT_RES[2 * i + 1];
1383 : }
1384 :
1385 190530 : if ( pgIpd[0] != 0.f )
1386 : {
1387 76290 : c0 = cosf( pgIpd[0] );
1388 76290 : s0 = sinf( pgIpd[0] );
1389 3748416 : for ( i = hStereoDft->band_limits[b]; i < hStereoDft->band_limits[b + 1]; i++ )
1390 : {
1391 : /*rotate L*/
1392 3672126 : tmp = DFT_L[2 * i] * c0 - DFT_L[2 * i + 1] * s0;
1393 3672126 : DFT_L[2 * i + 1] = DFT_L[2 * i] * s0 + DFT_L[2 * i + 1] * c0;
1394 3672126 : DFT_L[2 * i] = tmp;
1395 : }
1396 : }
1397 : }
1398 2467590 : else if ( sba_dirac_stereo_flag && hMdDec )
1399 : {
1400 :
1401 655920 : if ( nchan_transport == 1 )
1402 : {
1403 225864 : if ( sba_mono_flag )
1404 : {
1405 43920 : if ( b == 0 )
1406 : {
1407 3660 : i = 0;
1408 :
1409 3660 : DFT_W = hStereoDft->mixer_mat_smooth[0][0][b + k * IVAS_MAX_NUM_BANDS] * pDFT_DMX[2 * i];
1410 3660 : DFT_L[2 * i] = DFT_W;
1411 3660 : DFT_R[2 * i] = 0.f;
1412 :
1413 3660 : DFT_W = hStereoDft->mixer_mat_smooth[0][0][b + k * IVAS_MAX_NUM_BANDS] * pDFT_DMX[2 * i + 1];
1414 3660 : DFT_L[2 * i + 1] = DFT_W;
1415 3660 : DFT_R[2 * i + 1] = 0.f;
1416 : }
1417 970692 : for ( i = hStereoDft->band_limits[b]; i < min( stop, hStereoDft->band_limits[b + 1] ); i++ )
1418 : {
1419 926772 : 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];
1420 926772 : DFT_L[2 * i] = DFT_W;
1421 926772 : DFT_R[2 * i] = 0.f;
1422 :
1423 926772 : 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];
1424 926772 : DFT_L[2 * i + 1] = DFT_W;
1425 926772 : DFT_R[2 * i + 1] = 0.f;
1426 : }
1427 870288 : for ( ; i < hStereoDft->band_limits[b + 1]; i++ )
1428 : {
1429 826368 : DFT_W = hStereoDft->mixer_mat_smooth[0][0][b + k * IVAS_MAX_NUM_BANDS] * pDFT_DMX[2 * i];
1430 826368 : DFT_L[2 * i] = DFT_W;
1431 826368 : DFT_R[2 * i] = 0.f;
1432 :
1433 826368 : DFT_W = hStereoDft->mixer_mat_smooth[0][0][b + k * IVAS_MAX_NUM_BANDS] * pDFT_DMX[2 * i + 1];
1434 826368 : DFT_L[2 * i + 1] = DFT_W;
1435 826368 : DFT_R[2 * i + 1] = 0.f;
1436 : }
1437 : }
1438 : else
1439 : {
1440 181944 : if ( b == 0 )
1441 : {
1442 16344 : i = 0;
1443 :
1444 16344 : DFT_W = hStereoDft->mixer_mat_smooth[0][0][b + k * IVAS_MAX_NUM_BANDS] * pDFT_DMX[2 * i];
1445 16344 : DFT_Y = hStereoDft->mixer_mat_smooth[1][0][b + k * IVAS_MAX_NUM_BANDS] * pDFT_DMX[2 * i];
1446 :
1447 16344 : DFT_L[2 * i] = DFT_W + DFT_Y;
1448 16344 : DFT_R[2 * i] = DFT_W - DFT_Y;
1449 :
1450 16344 : DFT_W = hStereoDft->mixer_mat_smooth[0][0][b + k * IVAS_MAX_NUM_BANDS] * pDFT_DMX[2 * i + 1];
1451 16344 : DFT_Y = hStereoDft->mixer_mat_smooth[1][0][b + k * IVAS_MAX_NUM_BANDS] * pDFT_DMX[2 * i + 1];
1452 :
1453 16344 : DFT_L[2 * i + 1] = DFT_W + DFT_Y;
1454 16344 : DFT_R[2 * i + 1] = DFT_W - DFT_Y;
1455 : }
1456 3830688 : for ( i = hStereoDft->band_limits[b]; i < min( stop, hStereoDft->band_limits[b + 1] ); i++ )
1457 : {
1458 3648744 : 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];
1459 3648744 : 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];
1460 :
1461 3648744 : DFT_L[2 * i] = DFT_W + DFT_Y;
1462 3648744 : DFT_R[2 * i] = DFT_W - DFT_Y;
1463 :
1464 3648744 : 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];
1465 3648744 : 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];
1466 :
1467 3648744 : DFT_L[2 * i + 1] = DFT_W + DFT_Y;
1468 3648744 : DFT_R[2 * i + 1] = DFT_W - DFT_Y;
1469 : }
1470 2092536 : for ( ; i < hStereoDft->band_limits[b + 1]; i++ )
1471 : {
1472 1910592 : DFT_W = hStereoDft->mixer_mat_smooth[0][0][b + k * IVAS_MAX_NUM_BANDS] * pDFT_DMX[2 * i];
1473 1910592 : DFT_Y = hStereoDft->mixer_mat_smooth[1][0][b + k * IVAS_MAX_NUM_BANDS] * pDFT_DMX[2 * i];
1474 :
1475 1910592 : DFT_L[2 * i] = DFT_W + DFT_Y;
1476 1910592 : DFT_R[2 * i] = DFT_W - DFT_Y;
1477 :
1478 1910592 : DFT_W = hStereoDft->mixer_mat_smooth[0][0][b + k * IVAS_MAX_NUM_BANDS] * pDFT_DMX[2 * i + 1];
1479 1910592 : DFT_Y = hStereoDft->mixer_mat_smooth[1][0][b + k * IVAS_MAX_NUM_BANDS] * pDFT_DMX[2 * i + 1];
1480 :
1481 1910592 : DFT_L[2 * i + 1] = DFT_W + DFT_Y;
1482 1910592 : DFT_R[2 * i + 1] = DFT_W - DFT_Y;
1483 : }
1484 : }
1485 : }
1486 430056 : else if ( nchan_transport >= 2 )
1487 : {
1488 430056 : if ( b == 0 )
1489 : {
1490 37656 : i = 0;
1491 :
1492 37656 : DFT_W = pDFT_DMX[2 * i];
1493 37656 : DFT_Y = hStereoDft->mixer_mat_smooth[1][0][b + k * IVAS_MAX_NUM_BANDS] * pDFT_DMX[2 * i] + pDFT_DMX1[2 * i];
1494 :
1495 37656 : DFT_L[2 * i] = DFT_W + DFT_Y;
1496 37656 : DFT_R[2 * i] = DFT_W - DFT_Y;
1497 :
1498 37656 : DFT_W = pDFT_DMX[2 * i + 1];
1499 37656 : DFT_Y = hStereoDft->mixer_mat_smooth[1][0][b + k * IVAS_MAX_NUM_BANDS] * pDFT_DMX[2 * i + 1] + pDFT_DMX1[2 * i + 1];
1500 :
1501 37656 : DFT_L[2 * i + 1] = DFT_W + DFT_Y;
1502 37656 : DFT_R[2 * i + 1] = DFT_W - DFT_Y;
1503 : }
1504 14976720 : for ( i = hStereoDft->band_limits[b]; i < hStereoDft->band_limits[b + 1]; i++ )
1505 : {
1506 14546664 : DFT_W = pDFT_DMX[2 * i];
1507 14546664 : DFT_Y = hStereoDft->mixer_mat_smooth[1][0][b + k * IVAS_MAX_NUM_BANDS] * pDFT_DMX[2 * i] + pDFT_DMX1[2 * i];
1508 :
1509 14546664 : DFT_L[2 * i] = DFT_W + DFT_Y;
1510 14546664 : DFT_R[2 * i] = DFT_W - DFT_Y;
1511 :
1512 14546664 : DFT_W = pDFT_DMX[2 * i + 1];
1513 14546664 : DFT_Y = hStereoDft->mixer_mat_smooth[1][0][b + k * IVAS_MAX_NUM_BANDS] * pDFT_DMX[2 * i + 1] + pDFT_DMX1[2 * i + 1];
1514 :
1515 14546664 : DFT_L[2 * i + 1] = DFT_W + DFT_Y;
1516 14546664 : DFT_R[2 * i + 1] = DFT_W - DFT_Y;
1517 : }
1518 : }
1519 : else
1520 : {
1521 : assert( "nhcan_transport must be 1 or 1!" );
1522 : }
1523 : }
1524 : else
1525 : {
1526 39073410 : for ( i = hStereoDft->band_limits[b]; i < min( stop, hStereoDft->band_limits[b + 1] ); i++ )
1527 : {
1528 37261740 : tmp = g * pDFT_DMX[2 * i] + pDFT_RES[2 * i] + DFT_PRED_RES[2 * i];
1529 :
1530 37261740 : DFT_L[2 * i] = pDFT_DMX[2 * i] + tmp;
1531 37261740 : DFT_R[2 * i] = pDFT_DMX[2 * i] - tmp;
1532 :
1533 37261740 : tmp = g * pDFT_DMX[2 * i + 1] + pDFT_RES[2 * i + 1] + DFT_PRED_RES[2 * i + 1];
1534 :
1535 37261740 : DFT_L[2 * i + 1] = pDFT_DMX[2 * i + 1] + tmp;
1536 37261740 : DFT_R[2 * i + 1] = pDFT_DMX[2 * i + 1] - tmp;
1537 :
1538 : #ifdef DEBUG_STEREO_DFT_OUTRESPRED
1539 : DFT_L[2 * i] = DFT_PRED_RES[2 * i];
1540 : DFT_R[2 * i] = -DFT_PRED_RES[2 * i];
1541 : DFT_L[2 * i + 1] = DFT_PRED_RES[2 * i + 1];
1542 : DFT_R[2 * i + 1] = -DFT_PRED_RES[2 * i + 1];
1543 : #endif /* DEBUG_STEREO_DFT_OUTRESPRED */
1544 : }
1545 :
1546 22942806 : for ( ; i < hStereoDft->band_limits[b + 1]; i++ )
1547 : {
1548 21131136 : tmp = g * pDFT_DMX[2 * i] + pDFT_RES[2 * i];
1549 :
1550 21131136 : DFT_L[2 * i] = pDFT_DMX[2 * i] + tmp;
1551 21131136 : DFT_R[2 * i] = pDFT_DMX[2 * i] - tmp;
1552 :
1553 21131136 : tmp = g * pDFT_DMX[2 * i + 1] + pDFT_RES[2 * i + 1];
1554 :
1555 21131136 : DFT_L[2 * i + 1] = pDFT_DMX[2 * i + 1] + tmp;
1556 21131136 : DFT_R[2 * i + 1] = pDFT_DMX[2 * i + 1] - tmp;
1557 :
1558 : #ifdef DEBUG_STEREO_DFT_OUTRESPRED
1559 : DFT_L[2 * i] = 0.f;
1560 : DFT_R[2 * i] = 0.f;
1561 : DFT_L[2 * i + 1] = 0.f;
1562 : DFT_R[2 * i + 1] = 0.f;
1563 : #endif /* DEBUG_STEREO_DFT_OUTRESPRED */
1564 : }
1565 :
1566 : /* Active Upmix */
1567 1811670 : if ( pgIpd[0] != 0.f )
1568 : {
1569 299784 : c0 = cosf( pgIpd[0] );
1570 299784 : s0 = sinf( pgIpd[0] );
1571 9505146 : for ( i = hStereoDft->band_limits[b]; i < hStereoDft->band_limits[b + 1]; i++ )
1572 : {
1573 : /*rotate L*/
1574 9205362 : tmp = DFT_L[2 * i] * c0 - DFT_L[2 * i + 1] * s0;
1575 9205362 : DFT_L[2 * i + 1] = DFT_L[2 * i] * s0 + DFT_L[2 * i + 1] * c0;
1576 9205362 : DFT_L[2 * i] = tmp;
1577 : }
1578 : }
1579 : }
1580 : }
1581 :
1582 288114 : if ( hStereoDft->frame_sid_nodata || st0->VAD == 0 )
1583 : {
1584 72618 : hFdCngDec->cna_band_limits[hFdCngDec->cna_nbands] = hStereoDft->band_limits[hFdCngDec->cna_nbands];
1585 : }
1586 :
1587 288114 : if ( hStereoDft->frame_sid_nodata && !sba_dirac_stereo_flag )
1588 : {
1589 32610 : hStereoCng->first_SID = 0;
1590 32610 : hStereoCng->first_SID_after_TD = 0;
1591 : }
1592 :
1593 9137394 : for ( i = hStereoDft->band_limits[b]; i < hStereoDft->NFFT / 2; i++ )
1594 : {
1595 8849280 : DFT_L[2 * i] = 0.f;
1596 8849280 : DFT_L[2 * i + 1] = 0.f;
1597 8849280 : DFT_R[2 * i] = 0.f;
1598 8849280 : DFT_R[2 * i + 1] = 0.f;
1599 : }
1600 :
1601 : /*Nyquist Freq.*/
1602 288114 : if ( hStereoDft->band_limits[b] == hStereoDft->NFFT / 2 )
1603 : {
1604 229086 : DFT_L[1] = pDFT_DMX[1] + g * pDFT_DMX[1];
1605 229086 : DFT_R[1] = pDFT_DMX[1] - g * pDFT_DMX[1];
1606 229086 : DFT_L[1] *= INV_SQRT_2;
1607 229086 : DFT_R[1] *= INV_SQRT_2;
1608 : }
1609 : else
1610 : {
1611 59028 : DFT_L[1] = 0.f;
1612 59028 : DFT_R[1] = 0.f;
1613 : }
1614 : }
1615 : else
1616 : {
1617 0 : pPredGain = NULL; /* to avoid compilation warnings */
1618 0 : pSideGain = NULL;
1619 :
1620 : #ifndef DEBUG_STEREO_DFT_NOSTEREO
1621 : /* Dummy upmix-> mono binauralization */
1622 0 : for ( i = 0; i < hStereoDft->NFFT; i++ )
1623 : {
1624 0 : DFT_L[i] = ( pDFT_DMX[i] + pDFT_RES[i] );
1625 0 : DFT_R[i] = ( pDFT_DMX[i] - pDFT_RES[i] );
1626 : }
1627 : #else
1628 : /*Copy DMX to Left channel and reset Right channel*/
1629 : mvr2r( pDFT_DMX, DFT_L, hStereoDft->NFFT );
1630 : mvr2r( pDFT_DMX, DFT_R, hStereoDft->NFFT );
1631 : #endif
1632 : }
1633 :
1634 : /* Comfort Noise Addition */
1635 288114 : if ( st0->flag_cna )
1636 : {
1637 239532 : ptr_per = &hFdCngDec->smoothed_psd[hFdCngCom->startBand];
1638 :
1639 239532 : scale_fact0 = 0.0f;
1640 239532 : if ( hFdCngDec->cna_rescale_fact > 0 )
1641 : {
1642 90189 : scale_fact0 = output_frame / 2 * sqrtf( hFdCngDec->cna_rescale_fact * 0.5f );
1643 : }
1644 :
1645 1886322 : for ( b = 0; b < hFdCngDec->cna_nbands; b++ )
1646 : {
1647 : /* calculate gamma factor reflecting inter-channel correlation and side gain (ILD) */
1648 1646790 : coh = hFdCngDec->cna_cm[b];
1649 1646790 : g = hFdCngDec->cna_g_state[b];
1650 :
1651 1646790 : if ( coh < 0.9f )
1652 : {
1653 1565922 : gamma = coh;
1654 1565922 : gamma = gamma / ( 1 - gamma );
1655 1565922 : gamma = sqrtf( gamma + 1 - g * g ) - sqrtf( gamma );
1656 : }
1657 : else
1658 : {
1659 80868 : gamma = 0;
1660 : }
1661 :
1662 39732378 : for ( i = max( hFdCngDec->cna_band_limits[b], hFdCngCom->startBand / 2 ); i < min( hFdCngDec->cna_band_limits[b + 1], L_FRAME16k / 2 ); i++ )
1663 : {
1664 38085588 : lev1 = *ptr_per++;
1665 38085588 : lev2 = *ptr_per++;
1666 :
1667 38085588 : if ( lev1 > 0 && lev2 > 0 && max( lev1, lev2 ) / min( lev1, lev2 ) > 1.2f )
1668 : {
1669 : /* take the minimum of two adjacent frequency bins */
1670 1634574 : cna_level = min( lev1, lev2 );
1671 : }
1672 : else
1673 : {
1674 : /* take the average of two adjacent frequency bins */
1675 36451014 : cna_level = 0.5f * ( lev1 + lev2 );
1676 : }
1677 :
1678 38085588 : scale_fact = scale_fact0 * sqrtf( cna_level );
1679 :
1680 : /* generate comfort noise from gaussian noise and add to the decoded DFT spectrum */
1681 38085588 : N1 = scale_fact * rand_gauss( &ftmp, cna_seed );
1682 38085588 : N2 = scale_fact * rand_gauss( &ftmp, cna_seed );
1683 38085588 : DFT_L[2 * i] += ( 1 + g ) * N1 + gamma * N2;
1684 38085588 : DFT_R[2 * i] += ( 1 - g ) * N1 - gamma * N2;
1685 :
1686 38085588 : N1 = scale_fact * rand_gauss( &ftmp, cna_seed );
1687 38085588 : N2 = scale_fact * rand_gauss( &ftmp, cna_seed );
1688 38085588 : DFT_L[2 * i + 1] += ( 1 + g ) * N1 + gamma * N2;
1689 38085588 : DFT_R[2 * i + 1] += ( 1 - g ) * N1 - gamma * N2;
1690 : }
1691 : }
1692 :
1693 : /* update CNA re-scaling factor */
1694 239532 : hFdCngDec->cna_rescale_fact = 0.8f * hFdCngDec->cna_act_fact;
1695 239532 : if ( !hFdCngDec->first_cna_noise_updated )
1696 : {
1697 145104 : hFdCngDec->cna_rescale_fact = 0;
1698 : }
1699 : }
1700 :
1701 : /* Update memories */
1702 288114 : hStereoDft->past_DMX_pos = ( hStereoDft->past_DMX_pos + 1 ) % STEREO_DFT_PAST_MAX;
1703 288114 : mvr2r( pDFT_DMX, hStereoDft->DFT_past_DMX[hStereoDft->past_DMX_pos], min( hStereoDft->NFFT, STEREO_DFT32MS_N_32k ) );
1704 : #ifndef DEBUG_STEREO_DFT_NOSTEREO
1705 288114 : if ( pPredGain )
1706 : {
1707 288114 : stereo_dft_adapt_sf_delay( hStereoDft, pPredGain );
1708 : }
1709 : #endif
1710 :
1711 288114 : mvr2r( DFT_L, DFT[0] + k * STEREO_DFT32MS_N_MAX, hStereoDft->NFFT );
1712 288114 : mvr2r( DFT_R, DFT[1] + k * STEREO_DFT32MS_N_MAX, hStereoDft->NFFT );
1713 : }
1714 :
1715 144057 : if ( st0->bfi && !prev_bfi )
1716 : {
1717 2016 : idx_k0 = ( hStereoDft->past_DMX_pos + STEREO_DFT_PAST_MAX - 1 ) % STEREO_DFT_PAST_MAX;
1718 2016 : idx_k1 = ( idx_k0 + 1 ) % STEREO_DFT_PAST_MAX;
1719 : /*dmx energy memory*/
1720 2016 : 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 ) );
1721 : }
1722 :
1723 144057 : stereo_dft_compute_td_stefi_params( hStereoDft, samp_ratio );
1724 :
1725 144057 : return;
1726 : }
1727 :
1728 :
1729 : /*-------------------------------------------------------------------------
1730 : * stereo_dft_dec_res()
1731 : *
1732 : * Decode the residual signal
1733 : *-------------------------------------------------------------------------*/
1734 :
1735 50169 : void stereo_dft_dec_res(
1736 : CPE_DEC_HANDLE hCPE, /* i/o: decoder CPE handle */
1737 : float res_buf[STEREO_DFT_N_8k], /* i : residual buffer */
1738 : float *output /* o : output */
1739 : )
1740 : {
1741 : int16_t i;
1742 : float win[L_FRAME8k + STEREO_DFT_OVL_8k];
1743 : float bpf_error_signal_8k[L_FRAME8k];
1744 : int16_t prev_bfi;
1745 : float fac, step;
1746 : int16_t res_bpf_flag;
1747 :
1748 50169 : 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.
1749 : The prev_old_bfi still holds the prev_bfi for the current frame. */
1750 :
1751 : /* flush memories when switching residual coding on */
1752 50169 : if ( hCPE->hStereoDft->res_cod_mode[STEREO_DFT_OFFSET - 1] == STEREO_DFT_RES_COD_OFF )
1753 : {
1754 426 : set_zero( hCPE->hStereoDft->res_cod_mem, STEREO_DFT_OVL_8k );
1755 426 : set_zero( hCPE->input_mem[1], NS2SA( 8000, STEREO_DFT32MS_OVL_NS ) );
1756 426 : set_zero( hCPE->hStereoDft->hBpf->pst_old_syn, STEREO_DFT_NBPSF_PIT_MAX_8k );
1757 426 : hCPE->hStereoDft->hBpf->pst_mem_deemp_err = 0.f;
1758 : }
1759 :
1760 : /*Inverse MDCT*/
1761 50169 : TCX_MDCT_Inverse( res_buf, win, STEREO_DFT_OVL_8k, L_FRAME8k - STEREO_DFT_OVL_8k, STEREO_DFT_OVL_8k, IVAS_CPE_DFT );
1762 :
1763 50169 : if ( !prev_bfi )
1764 : {
1765 : /*OLA*/
1766 : /*overlapping parts*/
1767 3462954 : for ( i = 0; i < STEREO_DFT_OVL_8k; i++ )
1768 : {
1769 3414180 : win[i] = hCPE->hStereoDft->res_cod_mem[i] + win[i] * hCPE->hStereoDft->win_8k[i];
1770 3414180 : hCPE->hStereoDft->res_cod_mem[i] = win[L_FRAME8k + i] * hCPE->hStereoDft->win_8k[STEREO_DFT_OVL_8k - 1 - i];
1771 : }
1772 : }
1773 : else
1774 : {
1775 : /* For first good frame, ola memory contains extended ECU buffer -- need to crossfade instead of OLA */
1776 1395 : step = (float) ( 1.0f / STEREO_DFT_OVL_8k );
1777 1395 : fac = 0;
1778 99045 : for ( i = 0; i < STEREO_DFT_OVL_8k; i++ )
1779 : {
1780 97650 : 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];
1781 97650 : hCPE->hStereoDft->res_cod_mem[i] = win[L_FRAME8k + i] * hCPE->hStereoDft->win_8k[STEREO_DFT_OVL_8k - 1 - i];
1782 97650 : fac += step;
1783 : }
1784 : }
1785 :
1786 : #ifdef DEBUG_STEREO_DFT_NOQRES
1787 : {
1788 : int16_t tmp[1024];
1789 : dbgread( &tmp, sizeof( int16_t ), L_FRAME8k, "./res/stereo_dft_enc_res_original.pcm" );
1790 : for ( i = 0; i < L_FRAME8k; i++ )
1791 : {
1792 : win[i] = (float) ( tmp[i] );
1793 : }
1794 : }
1795 : #endif
1796 50169 : mvr2r( win, output, L_FRAME8k );
1797 :
1798 : #ifdef DEBUG_MODE_DFT
1799 : {
1800 : int16_t tmp[L_FRAME8k];
1801 :
1802 : for ( i = 0; i < L_FRAME8k; i++ )
1803 : {
1804 : tmp[i] = (int16_t) ( win[i] );
1805 : }
1806 : dbgwrite( tmp, sizeof( int16_t ), L_FRAME8k, 1, "./res/stereo_dft_dec_res_decoded.pcm" );
1807 : }
1808 : #endif
1809 50169 : if ( hCPE->hCoreCoder[0]->core == ACELP_CORE )
1810 : {
1811 : /* bass post-filter */
1812 32430 : 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,
1813 32430 : hCPE->hCoreCoder[0]->stab_fac, &hCPE->hStereoDft->stab_fac_smooth_res, hCPE->hCoreCoder[0]->last_coder_type, bpf_error_signal_8k );
1814 :
1815 32430 : res_bpf_flag = res_bpf_adapt( hCPE->hStereoDft, bpf_error_signal_8k, res_buf );
1816 32430 : if ( prev_bfi )
1817 : {
1818 : /* Ramp up BPF contribution for the first good frame */
1819 687 : step = (float) ( 1.0f / L_FRAME8k );
1820 687 : fac = 0;
1821 110607 : for ( i = 0; i < L_FRAME8k; i++ )
1822 : {
1823 109920 : bpf_error_signal_8k[i] *= fac;
1824 109920 : fac += step;
1825 : }
1826 : }
1827 :
1828 32430 : if ( res_bpf_flag )
1829 : {
1830 31452 : v_sub( output, bpf_error_signal_8k, output, L_FRAME8k );
1831 : }
1832 : }
1833 17739 : else if ( hCPE->hCoreCoder[0]->last_core == ACELP_CORE )
1834 : {
1835 0 : set_zero( hCPE->hStereoDft->hBpf->pst_old_syn, STEREO_DFT_NBPSF_PIT_MAX_8k );
1836 0 : hCPE->hStereoDft->hBpf->pst_mem_deemp_err = 0.f;
1837 : }
1838 : #ifdef DEBUG_MODE_DFT
1839 : {
1840 : int16_t v;
1841 : int16_t out_bpf[L_FRAME8k];
1842 :
1843 : if ( hCPE->hCoreCoder[0]->core == ACELP_CORE )
1844 : {
1845 : for ( v = 0; v < L_FRAME8k; v++ )
1846 : {
1847 : out_bpf[v] = (int16_t) bpf_error_signal_8k[v];
1848 : }
1849 : }
1850 : else
1851 : {
1852 : set_s( out_bpf, 0, L_FRAME8k );
1853 : }
1854 : dbgwrite( out_bpf, sizeof( int16_t ), L_FRAME8k, 1, "res/bpf_res.pcm" );
1855 : }
1856 : #endif
1857 :
1858 50169 : return;
1859 : }
1860 :
1861 :
1862 : /*-------------------------------------------------------------------------
1863 : * stereo_dft_dec_read_BS()
1864 : *
1865 : * Read bitstream
1866 : *-------------------------------------------------------------------------*/
1867 :
1868 158025 : void stereo_dft_dec_read_BS(
1869 : const int32_t ivas_total_brate, /* i : IVAS total bitrate */
1870 : const int32_t element_brate, /* i : element bitrate */
1871 : int32_t *total_brate, /* o : total bitrate */
1872 : Decoder_State *st, /* i/o: decoder state structure */
1873 : STEREO_DFT_DEC_DATA_HANDLE hStereoDft, /* i/o: decoder stereo handle */
1874 : const int16_t bwidth, /* i : bandwidth */
1875 : const int16_t output_frame, /* i : output frame length */
1876 : float res_buf[STEREO_DFT_N_8k], /* o : residual buffer */
1877 : int16_t *nb_bits, /* o : number of bits read */
1878 : float *coh, /* i/o: Coherence */
1879 : const int16_t ivas_format /* i : ivas format */
1880 : )
1881 : {
1882 : int16_t b, N_div, nbands;
1883 : int16_t NFFT_inner;
1884 : int16_t k, k_offset;
1885 : int16_t I;
1886 : int16_t max_bits;
1887 : uint16_t bit_stream_side[800]; /*Max bits per frame for 30kbps*/
1888 : RangeUniDecState range_uni_dec_state;
1889 : ECSQ_instance ecsq_inst;
1890 :
1891 : /* needed for provisorial reordering of indices */
1892 : int16_t ind1[STEREO_DFT_BAND_MAX];
1893 : int16_t n_bits;
1894 : int16_t nb, ind1_ipd[STEREO_DFT_BAND_MAX], ind1_pred[STEREO_DFT_BAND_MAX];
1895 : int16_t sign_flag;
1896 : float sg_tmp[STEREO_DFT_BAND_MAX];
1897 : float res_pred_gain_tmp[STEREO_DFT_BAND_MAX];
1898 : int16_t itd_mode;
1899 :
1900 : #ifdef DEBUG_MODE_DFT
1901 : static FILE *pF = NULL;
1902 : static FILE *ITD_values = NULL, *side_gain_values = NULL, *RPG_values = NULL;
1903 :
1904 : if ( pF == NULL )
1905 : pF = fopen( "./res/stereo_dft_dec_ind.txt", "w" );
1906 : if ( ITD_values == NULL )
1907 : ITD_values = fopen( "./res/itd_indicies_dec.txt", "w" );
1908 : if ( side_gain_values == NULL )
1909 : side_gain_values = fopen( "./res/side_gain_indicies_dec.txt", "w" );
1910 : if ( RPG_values == NULL )
1911 : RPG_values = fopen( "./res/rpg_indicies_dec.txt", "w" );
1912 :
1913 : assert( *nb_bits <= 800 );
1914 : #endif
1915 : /*------------------------------------------------------------------*
1916 : * Initialization
1917 : *-----------------------------------------------------------------*/
1918 :
1919 158025 : k_offset = STEREO_DFT_OFFSET;
1920 :
1921 158025 : if ( ivas_total_brate == IVAS_SID_5k2 )
1922 : {
1923 4287 : if ( ivas_format == MASA_FORMAT )
1924 : {
1925 222 : hStereoDft->frame_nodata = 0;
1926 222 : hStereoDft->frame_sid_nodata = 1;
1927 222 : hStereoDft->frame_sid = 1;
1928 222 : *nb_bits = 0;
1929 : }
1930 : else
1931 : {
1932 4065 : hStereoDft->frame_nodata = 0;
1933 4065 : hStereoDft->frame_sid_nodata = 1;
1934 4065 : hStereoDft->frame_sid = 1;
1935 4065 : *nb_bits = ( IVAS_SID_5k2 - SID_2k40 ) / FRAMES_PER_SEC - SID_FORMAT_NBITS;
1936 : }
1937 : }
1938 153738 : else if ( ivas_total_brate == FRAME_NO_DATA )
1939 : {
1940 26517 : hStereoDft->frame_nodata = 1;
1941 26517 : hStereoDft->frame_sid_nodata = 1;
1942 26517 : hStereoDft->frame_sid = 0;
1943 26517 : *nb_bits = 0;
1944 26517 : *total_brate = 0;
1945 26517 : hStereoDft->itd[k = hStereoDft->prm_res[k_offset] - 1 + k_offset] = hStereoDft->itd_xfade_target;
1946 26517 : hStereoDft->gipd[hStereoDft->prm_res[k_offset] - 1 + k_offset] = hStereoDft->ipd_xfade_target;
1947 :
1948 26517 : return;
1949 : }
1950 : else
1951 : {
1952 127221 : hStereoDft->frame_nodata = 0;
1953 127221 : hStereoDft->frame_sid_nodata = 0;
1954 127221 : hStereoDft->frame_sid = 0;
1955 :
1956 127221 : st->total_brate = *nb_bits * FRAMES_PER_SEC;
1957 : }
1958 :
1959 131508 : hStereoDft->reverb_flag = 0;
1960 :
1961 : /* reverse the bitstream */
1962 24168480 : for ( b = 0; b < *nb_bits; b++ )
1963 : {
1964 24036972 : bit_stream_side[b] = st->bit_stream[-b];
1965 : }
1966 :
1967 : /* make sure the padding bits read ahead by the arithmetic coder (up to 16) or range coder (up to 32) have binary values */
1968 4339764 : for ( ; b < *nb_bits + 32; b++ )
1969 : {
1970 4208256 : bit_stream_side[b] = 0;
1971 : }
1972 131508 : st->bit_stream = bit_stream_side;
1973 :
1974 : /*init*/
1975 131508 : max_bits = *nb_bits;
1976 131508 : *nb_bits = 0;
1977 131508 : N_div = STEREO_DFT_NBDIV;
1978 :
1979 131508 : if ( ivas_total_brate > IVAS_SID_5k2 )
1980 : {
1981 127221 : mvr2r( hStereoDft->side_gain + 2 * STEREO_DFT_BAND_MAX, sg_tmp, STEREO_DFT_BAND_MAX );
1982 127221 : mvr2r( hStereoDft->res_pred_gain + 2 * STEREO_DFT_BAND_MAX, res_pred_gain_tmp, STEREO_DFT_BAND_MAX );
1983 : }
1984 :
1985 : /* attackPresent always set to 0 in SID frames */
1986 131508 : if ( hStereoDft->frame_sid )
1987 : {
1988 4287 : hStereoDft->attackPresent = 0;
1989 : }
1990 : else
1991 : {
1992 127221 : hStereoDft->attackPresent = get_next_indice( st, 1 );
1993 127221 : ( *nb_bits )++;
1994 : }
1995 :
1996 : /* read res_cod_mode from bitstream */
1997 131508 : if ( bwidth == WB && hStereoDft->hConfig->ada_wb_res_cod_mode )
1998 : {
1999 9657 : hStereoDft->res_cod_mode[k_offset] = get_next_indice( st, 1 );
2000 9657 : ( *nb_bits )++;
2001 : #ifdef DEBUG_MODE_DFT
2002 : fprintf( pF, "res_cod_mode: %d\n", hStereoDft->res_cod_mode[k_offset] );
2003 : #endif
2004 : }
2005 :
2006 : /* read number of bands in the bitstream - depends on the audio bandwidth and not to output_Fs */
2007 131508 : if ( hStereoDft->frame_sid )
2008 : {
2009 4287 : NFFT_inner = STEREO_DFT32MS_N_MAX * inner_frame_tbl[bwidth] / L_FRAME48k;
2010 : }
2011 : else
2012 : {
2013 127221 : NFFT_inner = STEREO_DFT32MS_N_MAX * inner_frame_tbl[st->bwidth] / L_FRAME48k;
2014 : }
2015 :
2016 : /* Use coarse band partition in inactive frames */
2017 131508 : if ( hStereoDft->frame_sid )
2018 : {
2019 4287 : hStereoDft->band_res[k_offset] = STEREO_DFT_BAND_RES_LOW;
2020 4287 : hStereoDft->res_cod_mode[k_offset] = STEREO_DFT_RES_COD_OFF;
2021 4287 : hStereoDft->nbands = stereo_dft_band_config( hStereoDft->band_limits, hStereoDft->band_res[k_offset], min( STEREO_DFT32MS_N_MAX, NFFT_inner ), DEC );
2022 :
2023 4287 : if ( hStereoDft->nbands > STEREO_DFT_COH_MAXBAND )
2024 : {
2025 648 : hStereoDft->band_limits[STEREO_DFT_COH_MAXBAND] = hStereoDft->band_limits[hStereoDft->nbands];
2026 648 : hStereoDft->nbands = STEREO_DFT_COH_MAXBAND;
2027 : }
2028 : }
2029 : else
2030 : {
2031 127221 : hStereoDft->nbands = stereo_dft_band_config( hStereoDft->band_limits, hStereoDft->band_res[k_offset], NFFT_inner, DEC );
2032 : }
2033 :
2034 131508 : hStereoDft->res_cod_band_max = dft_band_res_cod[hStereoDft->band_res[k_offset]][hStereoDft->res_cod_mode[k_offset]];
2035 131508 : 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 ) );
2036 131508 : hStereoDft->res_cod_line_max = 8 * ( hStereoDft->res_cod_line_max / 8 );
2037 131508 : hStereoDft->res_pred_band_min = max( STEREO_DFT_RES_PRED_BAND_MIN, hStereoDft->res_cod_band_max );
2038 :
2039 : #ifdef DEBUG_MODE_DFT
2040 : 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 );
2041 : fprintf( pF, "stereo Bands: %d\n", hStereoDft->nbands );
2042 : #endif
2043 :
2044 : /*Copy config. for all DFT frames*/
2045 131508 : set_s( hStereoDft->band_res + k_offset + 1, hStereoDft->band_res[k_offset], N_div - 1 );
2046 131508 : set_s( hStereoDft->prm_res + k_offset + 1, hStereoDft->prm_res[k_offset], N_div - 1 );
2047 131508 : set_s( hStereoDft->res_pred_mode + k_offset + 1, hStereoDft->res_pred_mode[k_offset], N_div - 1 );
2048 131508 : set_s( hStereoDft->res_cod_mode + k_offset + 1, hStereoDft->res_cod_mode[k_offset], N_div - 1 );
2049 :
2050 : /*------------------------------------------------------------------*
2051 : * Read DFT stereo parameters
2052 : *-----------------------------------------------------------------*/
2053 :
2054 : /* Sent from the latest to the oldest */
2055 263016 : for ( k = hStereoDft->prm_res[k_offset] - 1; k < N_div; k += hStereoDft->prm_res[k + k_offset] )
2056 : {
2057 : #ifdef DEBUG_MODE_DFT
2058 : fprintf( pF, "ch[%d]:", k );
2059 : #endif
2060 : /* reset parameters */
2061 131508 : set_zero( hStereoDft->side_gain + ( k + k_offset ) * STEREO_DFT_BAND_MAX, STEREO_DFT_BAND_MAX );
2062 131508 : hStereoDft->gipd[k + k_offset] = 0.f;
2063 131508 : set_zero( hStereoDft->res_pred_gain + ( k + k_offset ) * STEREO_DFT_BAND_MAX, STEREO_DFT_BAND_MAX );
2064 :
2065 : #ifdef DEBUG_MODE_DFT
2066 : fprintf( pF, "ITD: %d ", hStereoDft->hConfig->itd_mode );
2067 : #endif
2068 :
2069 131508 : if ( !( ivas_format == MASA_FORMAT && ivas_total_brate <= IVAS_SID_5k2 ) )
2070 : {
2071 : /*------------------------------------------------------------------*
2072 : * read Side gains
2073 : *-----------------------------------------------------------------*/
2074 :
2075 : /* side gain */
2076 : /* get coding type */
2077 : /* Do not read and decode side gain if a NO_DATA frame */
2078 131286 : if ( !hStereoDft->frame_nodata )
2079 : {
2080 131286 : n_bits = 0;
2081 131286 : nb = st->next_bit_pos;
2082 131286 : n_bits = read_flag_EC_DFT( &st->bit_stream[nb], &hStereoDft->side_gain_flag_1 );
2083 131286 : nb += n_bits;
2084 :
2085 131286 : if ( hStereoDft->side_gain_flag_1 == 0 )
2086 : {
2087 102252 : b = read_BS_adapt_GR_sg( st->bit_stream, nb, ind1, hStereoDft->nbands, &hStereoDft->side_gain_flag_2, dft_maps_sg );
2088 102252 : n_bits += b;
2089 : }
2090 : else
2091 : {
2092 29034 : if ( hStereoDft->side_gain_flag_1 == 2 ) /* differential */
2093 : {
2094 25959 : b = read_BS_GR( st->bit_stream, nb, ind1, hStereoDft->nbands, &hStereoDft->side_gain_flag_2 );
2095 25959 : n_bits += b;
2096 264192 : for ( b = 0; b < hStereoDft->nbands; b++ )
2097 : {
2098 238233 : ind1[b] += hStereoDft->side_gain_index_previous[b];
2099 : }
2100 : }
2101 : else
2102 : {
2103 20799 : for ( b = 0; b < hStereoDft->nbands; b++ )
2104 : {
2105 17724 : ind1[b] = get_value( &st->bit_stream[nb], STEREO_DFT_SIDEGAIN_NBITS );
2106 17724 : nb += STEREO_DFT_SIDEGAIN_NBITS;
2107 17724 : n_bits += STEREO_DFT_SIDEGAIN_NBITS;
2108 : }
2109 : }
2110 : }
2111 :
2112 1369926 : for ( b = 0; b < hStereoDft->nbands; b++ )
2113 : {
2114 1238640 : hStereoDft->side_gain_index_previous[b] = ind1[b];
2115 :
2116 1238640 : hStereoDft->res_gains_ind[0][b + STEREO_DFT_BAND_MAX] = ind1[b];
2117 : }
2118 :
2119 : #ifdef DEBUG_MODE_DFT
2120 : for ( b = 0; b < hStereoDft->nbands; b++ )
2121 : {
2122 : fprintf( pF, "Side gain: %d ", ind1[b] );
2123 : fprintf( side_gain_values, " %d ", ind1[b] );
2124 : }
2125 : #endif
2126 131286 : st->next_bit_pos += n_bits;
2127 131286 : ( *nb_bits ) += n_bits;
2128 : }
2129 :
2130 : /*------------------------------------------------------------------*
2131 : * read ITDs
2132 : *-----------------------------------------------------------------*/
2133 :
2134 131286 : if ( !hStereoDft->frame_sid_nodata )
2135 : {
2136 127221 : itd_mode = get_next_indice( st, STEREO_DFT_ITD_MODE_NBITS );
2137 127221 : ( *nb_bits ) += STEREO_DFT_ITD_MODE_NBITS; /*ITD mode flag: 1bit*/
2138 :
2139 127221 : hStereoDft->itd[k + k_offset] = 0.f;
2140 127221 : if ( itd_mode )
2141 : {
2142 76749 : ( *nb_bits ) += read_itd( st, &I );
2143 76749 : stereo_dft_dequantize_itd( &I, hStereoDft->itd + k + k_offset, st->output_Fs );
2144 : #ifdef DEBUG_MODE_DFT
2145 : fprintf( pF, "ITD: %d ", I );
2146 : fprintf( ITD_values, "%d %d ", frame, I );
2147 : #endif
2148 : }
2149 : }
2150 4065 : 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 ) )
2151 : {
2152 4065 : itd_mode = get_next_indice( st, STEREO_DFT_ITD_MODE_NBITS );
2153 4065 : ( *nb_bits ) += STEREO_DFT_ITD_MODE_NBITS; /*ITD mode flag: 1bit*/
2154 :
2155 4065 : hStereoDft->itd[k + k_offset] = 0.f;
2156 4065 : if ( itd_mode )
2157 : {
2158 90 : sign_flag = get_next_indice( st, 1 );
2159 90 : I = get_next_indice( st, STEREO_DFT_SID_ITD_NBITS );
2160 90 : ( *nb_bits ) += STEREO_DFT_SID_ITD_NBITS + 1;
2161 90 : I = I << STEREO_DFT_SID_ITD_FAC;
2162 90 : I += 256 * sign_flag;
2163 90 : stereo_dft_dequantize_itd( &I, hStereoDft->itd + k + k_offset, st->output_Fs );
2164 : #ifdef DEBUG_MODE_DFT
2165 : fprintf( pF, "ITD: %d ", I );
2166 : fprintf( ITD_values, "%d %d ", frame, I );
2167 : #endif
2168 : }
2169 : }
2170 :
2171 : /*------------------------------------------------------------------*
2172 : * read IPDs
2173 : *-----------------------------------------------------------------*/
2174 :
2175 131286 : n_bits = 0;
2176 131286 : nb = st->next_bit_pos;
2177 :
2178 131286 : if ( !hStereoDft->frame_sid_nodata )
2179 : {
2180 : /* Active frame */
2181 127221 : hStereoDft->no_ipd_flag = st->bit_stream[nb];
2182 127221 : nb += 1;
2183 127221 : n_bits += 1;
2184 127221 : if ( hStereoDft->no_ipd_flag == 0 )
2185 : {
2186 11721 : ind1_ipd[0] = get_value( &st->bit_stream[nb], STEREO_DFT_GIPD_NBITS );
2187 11721 : nb += STEREO_DFT_GIPD_NBITS;
2188 11721 : n_bits += STEREO_DFT_GIPD_NBITS;
2189 11721 : stereo_dft_dequantize_ipd( &ind1_ipd[0], hStereoDft->gipd + ( k + k_offset ), 1, STEREO_DFT_GIPD_NBITS );
2190 : }
2191 : }
2192 4065 : else if ( *nb_bits <= ( ( IVAS_SID_5k2 - SID_2k40 ) / FRAMES_PER_SEC - STEREO_DFT_FLAG_BITS - STEREO_DFT_SID_GIPD_NBITS - SID_FORMAT_NBITS ) )
2193 : {
2194 : /* SID frame, only read IPD only if enough bits left in bitstream */
2195 4065 : hStereoDft->no_ipd_flag = st->bit_stream[nb];
2196 4065 : nb += 1;
2197 4065 : n_bits += 1;
2198 4065 : if ( hStereoDft->no_ipd_flag == 0 )
2199 : {
2200 816 : ind1_ipd[0] = get_value( &st->bit_stream[nb], STEREO_DFT_SID_GIPD_NBITS );
2201 816 : nb += STEREO_DFT_SID_GIPD_NBITS;
2202 816 : n_bits += STEREO_DFT_SID_GIPD_NBITS;
2203 816 : stereo_dft_dequantize_ipd( &ind1_ipd[0], hStereoDft->gipd + ( k + k_offset ), 1, STEREO_DFT_SID_GIPD_NBITS );
2204 : }
2205 : }
2206 : else
2207 : {
2208 0 : hStereoDft->no_ipd_flag = 1;
2209 : }
2210 :
2211 131286 : st->next_bit_pos += n_bits;
2212 131286 : ( *nb_bits ) += n_bits;
2213 :
2214 : /*------------------------------------------------------------------*
2215 : * read Residual parameters
2216 : *-----------------------------------------------------------------*/
2217 :
2218 : /* Residual prediction */ /* Switch it off if ITD detected */
2219 131286 : n_bits = 0;
2220 131286 : nb = st->next_bit_pos;
2221 :
2222 : /* Not used in inactive frames */
2223 131286 : if ( !hStereoDft->frame_sid_nodata )
2224 : {
2225 127221 : if ( hStereoDft->res_pred_mode[k + k_offset] && ( hStereoDft->attackPresent == 0 ) )
2226 : {
2227 122589 : nbands = min( hStereoDft->nbands, STEREO_DFT_RES_PRED_BAND_MAX );
2228 :
2229 122589 : hStereoDft->reverb_flag = 0;
2230 122589 : hStereoDft->nbands_respred = nbands;
2231 :
2232 : /* Read bit for adaptive SF (WB/SWB & FB) */
2233 122589 : if ( hStereoDft->hConfig->res_cod_mode == STEREO_DFT_RES_COD_OFF )
2234 : {
2235 74157 : hStereoDft->reverb_flag = get_next_indice( st, STEREO_DFT_REVERB_MODE_NBITS );
2236 74157 : ( *nb_bits ) += STEREO_DFT_REVERB_MODE_NBITS;
2237 74157 : nb += STEREO_DFT_REVERB_MODE_NBITS;
2238 : #ifdef DEBUG_MODE_DFT
2239 : fprintf( RPG_values, " reverb_flag %d ", hStereoDft->reverb_flag );
2240 : #endif
2241 74157 : if ( hStereoDft->reverb_flag )
2242 : {
2243 19686 : nbands -= STEREO_DFT_RES_PRED_BAND_MIN_CONST;
2244 : }
2245 : }
2246 :
2247 : /* get coding type */
2248 122589 : b = read_flag_EC_DFT( &st->bit_stream[nb], &hStereoDft->res_pred_flag_0 );
2249 122589 : nb += b;
2250 122589 : n_bits += b;
2251 :
2252 122589 : if ( hStereoDft->res_pred_flag_0 == 0 )
2253 : {
2254 : #ifdef DEBUG_MODE_DFT
2255 : fprintf( RPG_values, "flag: 0" );
2256 : #endif
2257 24609 : b = read_BS_adapt_GR_rpg( st->bit_stream, nb, ind1_pred, hStereoDft->res_pred_band_min, nbands, &hStereoDft->res_pred_flag_1 );
2258 24609 : n_bits += b;
2259 : }
2260 : else
2261 : {
2262 97980 : if ( hStereoDft->res_pred_flag_0 == 2 )
2263 : {
2264 : #ifdef DEBUG_MODE_DFT
2265 : fprintf( RPG_values, "flag: 2" );
2266 : #endif
2267 88296 : 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 );
2268 :
2269 88296 : n_bits += b;
2270 708441 : for ( b = hStereoDft->res_pred_band_min; b < nbands; b++ )
2271 : {
2272 620145 : ind1_pred[b] += hStereoDft->res_pred_index_previous[b];
2273 : }
2274 : }
2275 : else
2276 : {
2277 : #ifdef DEBUG_MODE_DFT
2278 : fprintf( RPG_values, "flag: 1" );
2279 : #endif
2280 67938 : for ( b = hStereoDft->res_pred_band_min; b < nbands; b++ )
2281 : {
2282 58254 : ind1_pred[b] = get_value( &st->bit_stream[nb], STEREO_DFT_RES_GAINS_BITS );
2283 58254 : nb += STEREO_DFT_RES_GAINS_BITS;
2284 58254 : n_bits += STEREO_DFT_RES_GAINS_BITS;
2285 : }
2286 : }
2287 : }
2288 :
2289 364749 : for ( b = 0; b < hStereoDft->res_pred_band_min; b++ )
2290 : {
2291 242160 : I = 0;
2292 242160 : 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 );
2293 242160 : hStereoDft->res_pred_index_previous[b] = I;
2294 242160 : hStereoDft->res_gains_ind[1][b + STEREO_DFT_BAND_MAX] = 0;
2295 : }
2296 :
2297 970209 : for ( b = hStereoDft->res_pred_band_min; b < nbands; b++ )
2298 : {
2299 847620 : I = ind1_pred[b];
2300 847620 : 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 );
2301 : #ifdef DEBUG_MODE_DFT
2302 : fprintf( pF, "Res pred values: %d ", I );
2303 : if ( hStereoDft->res_pred_flag_0 == 2 )
2304 : fprintf( RPG_values, " %d(%d) ", I, hStereoDft->res_pred_index_previous[b] );
2305 : else
2306 : fprintf( RPG_values, " %d ", I );
2307 : #endif
2308 847620 : hStereoDft->res_pred_index_previous[b] = I;
2309 847620 : hStereoDft->res_gains_ind[1][b + STEREO_DFT_BAND_MAX] = I;
2310 : }
2311 :
2312 204783 : for ( ; b < hStereoDft->nbands; b++ )
2313 : {
2314 82194 : I = 0;
2315 82194 : 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 );
2316 82194 : hStereoDft->res_pred_index_previous[b] = I;
2317 82194 : hStereoDft->res_gains_ind[1][b + STEREO_DFT_BAND_MAX] = 0;
2318 : }
2319 : }
2320 : else
2321 : {
2322 47814 : for ( b = 0; b < hStereoDft->nbands; b++ )
2323 : {
2324 43182 : I = 0;
2325 43182 : 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 );
2326 43182 : hStereoDft->res_pred_index_previous[b] = I;
2327 43182 : hStereoDft->res_gains_ind[1][b + STEREO_DFT_BAND_MAX] = I;
2328 : }
2329 : }
2330 :
2331 127221 : st->next_bit_pos += n_bits;
2332 127221 : ( *nb_bits ) += n_bits;
2333 : }
2334 : else
2335 : {
2336 : /* Dequantize sidegain if SID frame */
2337 4065 : if ( hStereoDft->frame_sid )
2338 : {
2339 27549 : for ( b = 0; b < hStereoDft->nbands; b++ )
2340 : {
2341 23484 : I = 0;
2342 23484 : 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 );
2343 : }
2344 : }
2345 : }
2346 : }
2347 :
2348 : #ifdef DEBUG_MODE_DFT
2349 : /*fprintf(stderr, "\nbres: %d\n", *nb_bits - nb_bits0);*/
2350 : #endif
2351 : }
2352 :
2353 131508 : if ( !( ivas_format == MASA_FORMAT && ivas_total_brate <= IVAS_SID_5k2 ) )
2354 : {
2355 131286 : if ( hStereoDft->side_gain_flag_1 != 2 )
2356 : {
2357 105327 : hStereoDft->sg_mem_corrupt = 0;
2358 : }
2359 : }
2360 :
2361 131508 : if ( ivas_total_brate > IVAS_SID_5k2 )
2362 : {
2363 127221 : hStereoDft->recovery_flg = stereo_dft_sg_recovery( hStereoDft );
2364 :
2365 127221 : if ( hStereoDft->recovery_flg )
2366 : {
2367 189 : mvr2r( sg_tmp, hStereoDft->side_gain + 2 * STEREO_DFT_BAND_MAX, STEREO_DFT_BAND_MAX );
2368 189 : mvr2r( res_pred_gain_tmp, hStereoDft->res_pred_gain + 2 * STEREO_DFT_BAND_MAX, STEREO_DFT_BAND_MAX );
2369 : }
2370 : }
2371 :
2372 : /*----------------------------------------------------------------*
2373 : * Residual decoding: spectral lines
2374 : *----------------------------------------------------------------*/
2375 :
2376 : /* Residual coding not used in inactive frames */
2377 131508 : if ( hStereoDft->res_cod_band_max > 0 && !hStereoDft->frame_sid_nodata )
2378 : {
2379 : int16_t dec[STEREO_DFT_N_MAX_RES];
2380 :
2381 50169 : I = get_next_indice( st, STEREO_DFT_RES_GLOBAL_GAIN_BITS );
2382 50169 : ( *nb_bits ) += STEREO_DFT_RES_GLOBAL_GAIN_BITS;
2383 :
2384 : #ifdef DEBUG_MODE_DFT
2385 : fprintf( pF, "\nGain: %d ", I );
2386 : #endif
2387 :
2388 50169 : push_wmops( "residual_decode" );
2389 50169 : if ( I != ECSQ_GLOBAL_GAIN_INDEX_ALL_ZERO )
2390 : {
2391 48828 : ECSQ_init_instance( &ecsq_inst, 0 /*dummy index*/, &range_uni_dec_state );
2392 :
2393 48828 : rc_uni_dec_init( &range_uni_dec_state, bit_stream_side + *nb_bits, max_bits - *nb_bits );
2394 :
2395 48828 : hStereoDft->res_global_gain = ECSQ_dequantize_gain( I );
2396 :
2397 48828 : ecsq_inst.config_index = 2 * hStereoDft->res_cod_mode[k_offset] - 1;
2398 :
2399 48828 : ECSQ_decode( &ecsq_inst, hStereoDft->res_cod_line_max, dec );
2400 :
2401 48828 : n_bits = rc_uni_dec_finish( &range_uni_dec_state );
2402 :
2403 : #ifdef DEBUGGING
2404 : /* IVAS_fmToDo: the assert has to be changed with proper bitstream error handling */
2405 : assert( range_uni_dec_state.bit_error_detected == 0 );
2406 : #endif
2407 :
2408 48828 : set_zero( res_buf, STEREO_DFT_N_8k );
2409 48828 : ECSQ_dequantize_vector( dec, hStereoDft->res_global_gain, hStereoDft->res_cod_line_max, res_buf );
2410 : }
2411 : else
2412 : {
2413 1341 : set_s( dec, 0, hStereoDft->res_cod_line_max );
2414 1341 : hStereoDft->res_global_gain = 0.0f;
2415 1341 : n_bits = 0;
2416 1341 : set_zero( res_buf, STEREO_DFT_N_8k );
2417 : }
2418 :
2419 50169 : ( *nb_bits ) += n_bits;
2420 50169 : pop_wmops();
2421 :
2422 : #ifdef DEBUG_MODE_DFT
2423 : fprintf( pF, "%d (max: %d)", n_bits + STEREO_DFT_RES_GLOBAL_GAIN_BITS, max_bits );
2424 : /*fprintf(pF, "%d (max: %d)", n_bits, max_bits);*/
2425 : #endif
2426 : }
2427 :
2428 131508 : if ( hStereoDft->frame_sid && !( ivas_format == MASA_FORMAT && ivas_total_brate <= IVAS_SID_5k2 ) )
2429 : {
2430 4065 : stereo_dft_dec_sid_coh( st, hStereoDft->nbands, coh, nb_bits );
2431 : }
2432 :
2433 131508 : if ( ivas_total_brate == IVAS_SID_5k2 && ivas_format != MASA_FORMAT )
2434 : {
2435 4065 : *nb_bits = (int16_t) ( ( element_brate - SID_2k40 ) / FRAMES_PER_SEC ); /* => hCPE->hCoreCoder[0]->total_brate = SID_2k40; */
2436 : }
2437 : {
2438 131508 : *total_brate = element_brate - ( *nb_bits * FRAMES_PER_SEC );
2439 : }
2440 :
2441 : #ifdef DEBUG_MODE_DFT
2442 : /*fprintf(pF, "Total bits: %d", (*nb_bits));*/
2443 : fprintf( pF, "\n" );
2444 : fprintf( ITD_values, "\n" );
2445 : fprintf( side_gain_values, "\n" );
2446 : fprintf( RPG_values, "\n" );
2447 : #endif
2448 :
2449 131508 : return;
2450 : }
2451 :
2452 :
2453 : /*-------------------------------------------------------------------------
2454 : * stereo_dft_compute_td_stefi_params()
2455 : *
2456 : *
2457 : *-------------------------------------------------------------------------*/
2458 :
2459 144057 : static void stereo_dft_compute_td_stefi_params(
2460 : STEREO_DFT_DEC_DATA_HANDLE hStereoDft, /* i/o: decoder DFT stereo handle */
2461 : const float samp_ratio /* i : sampling ratio */
2462 : )
2463 : {
2464 : int16_t pdmx_ind;
2465 : float g2;
2466 : int16_t bin0;
2467 : int16_t band0;
2468 : int16_t b;
2469 : int16_t nbands;
2470 : int16_t bres;
2471 : float wsum;
2472 : float pred_gain_avg, pred_g;
2473 : float nrg_DMX, nrg_pred_DMX;
2474 :
2475 144057 : pdmx_ind = hStereoDft->past_DMX_pos;
2476 144057 : bres = hStereoDft->band_res[1];
2477 :
2478 144057 : if ( hStereoDft->core_hist[1] != ACELP_CORE || hStereoDft->wasTransient )
2479 : {
2480 70242 : hStereoDft->td_gain[0] = 0;
2481 :
2482 70242 : return;
2483 : }
2484 :
2485 73815 : bin0 = (int16_t) ( samp_ratio * hStereoDft->NFFT / 2 + .5 );
2486 73815 : bin0 = min( bin0, hStereoDft->band_limits[hStereoDft->nbands] );
2487 73815 : b = hStereoDft->nbands;
2488 230562 : while ( hStereoDft->band_limits[b] > bin0 )
2489 : {
2490 156747 : b--;
2491 : }
2492 73815 : band0 = b;
2493 :
2494 : /* calculate averages over high bands */
2495 73815 : pred_g = pred_gain_avg = 0;
2496 73815 : nbands = 0;
2497 73815 : wsum = 0;
2498 225915 : for ( b = band0; b < hStereoDft->nbands; b++ )
2499 : {
2500 154104 : 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 )
2501 : {
2502 2004 : hStereoDft->td_gain[0] = 0;
2503 2004 : return;
2504 : }
2505 152100 : 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];
2506 152100 : 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];
2507 :
2508 152100 : nbands++;
2509 152100 : wsum += dft_res_pred_weights[bres][b - band0];
2510 : }
2511 :
2512 71811 : if ( nbands == 0 )
2513 : {
2514 : /* apparently, there is nothing to do here */
2515 8919 : hStereoDft->td_gain[0] = 0;
2516 8919 : return;
2517 : }
2518 :
2519 62892 : pred_g /= wsum;
2520 62892 : pred_gain_avg /= wsum;
2521 :
2522 62892 : nrg_DMX = hStereoDft->hb_nrg[0];
2523 62892 : nrg_pred_DMX = hStereoDft->hb_nrg[1];
2524 :
2525 62892 : g2 = pred_g * sqrtf( ( 0.001f + nrg_DMX ) / ( 0.001f + nrg_pred_DMX ) );
2526 :
2527 62892 : 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 );
2528 :
2529 62892 : return;
2530 : }
2531 :
2532 :
2533 : /*-------------------------------------------------------------------------
2534 : * stereo_dft_generate_res_pred()
2535 : *
2536 : *
2537 : *-------------------------------------------------------------------------*/
2538 252048 : void stereo_dft_generate_res_pred(
2539 : STEREO_DFT_DEC_DATA_HANDLE hStereoDft, /* i/o: decoder DFT stereo handle */
2540 : const float samp_ratio, /* i : sampling ratio */
2541 : float *pDFT_DMX, /* i : downmix signal */
2542 : float *DFT_PRED_RES, /* o : residual prediction signal */
2543 : float *pPredGain, /* i : residual prediction gains */
2544 : const int16_t k, /* i : subframe index */
2545 : float *ap_filt_DMX, /* i : enhanced stereo filling signal */
2546 : int16_t *stop, /* o : last FD stereo filling bin */
2547 : const int16_t bfi /* i : BFI flag */
2548 : )
2549 : {
2550 : /* general variables */
2551 : int16_t i, b;
2552 : int16_t begin, end;
2553 : int16_t bin0, band0; /* ESF->Stefi crossover bin/band */
2554 : int16_t lb_stefi_start_band;
2555 :
2556 : /* variables for enhanced stereo filling */
2557 : float norm_fac;
2558 : float alpha, gain_limit;
2559 :
2560 : /* variables for stereo filling */
2561 : int16_t d_long, d_short, d_long_ind, d_short_ind;
2562 : float g_short, g_long;
2563 : float dmx_nrg, rev_nrg;
2564 : float past_dmx_nrg;
2565 : float pred_gain_avg;
2566 : float g2;
2567 : int16_t nbands_respred;
2568 :
2569 252048 : push_wmops( "gen_respred" );
2570 :
2571 : /* smoothing and limiting parameters */
2572 252048 : alpha = hStereoDft->wasTransient ? 0 : 0.2f; /* no smoothing after transients */
2573 252048 : gain_limit = 2;
2574 :
2575 : /* residual prediction only used up to 16 kHz (SWB) */
2576 252048 : nbands_respred = min( hStereoDft->nbands, STEREO_DFT_RES_PRED_BAND_MAX );
2577 :
2578 : /* In ACELP mode the downmix signal is not available in bandwidth extension area. *
2579 : * Therefore, the downmix energy in the corresponding subbands is estimated. */
2580 252048 : bin0 = (int16_t) ( samp_ratio * hStereoDft->NFFT / 2 + .5 );
2581 252048 : bin0 = min( bin0, hStereoDft->band_limits[hStereoDft->nbands] );
2582 252048 : b = hStereoDft->nbands;
2583 811158 : while ( hStereoDft->band_limits[b] >= bin0 )
2584 : {
2585 559110 : b--;
2586 : }
2587 252048 : band0 = b;
2588 :
2589 252048 : if ( hStereoDft->res_pred_mode[k + STEREO_DFT_OFFSET] < STEREO_DFT_RESPRED_ESF )
2590 : {
2591 : /* no ESF signal available, use stereo filling over whole spectrum */
2592 106602 : lb_stefi_start_band = max( hStereoDft->res_pred_band_min, hStereoDft->res_cod_band_max );
2593 : }
2594 : else
2595 : {
2596 : /* ESF signal available, use ESF in lowband, stereo filling in highband */
2597 145446 : lb_stefi_start_band = max( band0, hStereoDft->res_cod_band_max );
2598 : }
2599 :
2600 252048 : if ( bfi )
2601 : {
2602 6936 : lb_stefi_start_band = 0;
2603 : }
2604 :
2605 : /* lowband: use ESF if available, else use stereo filling */
2606 252048 : if ( hStereoDft->res_pred_mode[k + STEREO_DFT_OFFSET] == STEREO_DFT_RESPRED_ESF )
2607 : {
2608 : /* ESF in lowband */
2609 : /* main loop over core region*/
2610 1179378 : for ( b = hStereoDft->res_cod_band_max; b <= band0; b++ )
2611 : {
2612 1033932 : dmx_nrg = EPSILON;
2613 1033932 : rev_nrg = EPSILON;
2614 :
2615 : /* calculate band energies (low band only in case of ACELP) */
2616 21434598 : for ( i = hStereoDft->band_limits[b]; i < min( hStereoDft->band_limits[b + 1], bin0 ); i++ )
2617 : {
2618 20400666 : dmx_nrg += pDFT_DMX[2 * i] * pDFT_DMX[2 * i] + pDFT_DMX[2 * i + 1] * pDFT_DMX[2 * i + 1];
2619 20400666 : rev_nrg += ap_filt_DMX[2 * i] * ap_filt_DMX[2 * i] + ap_filt_DMX[2 * i + 1] * ap_filt_DMX[2 * i + 1];
2620 : }
2621 :
2622 : /* smoothing */
2623 1033932 : hStereoDft->smooth_res_nrg[b] = alpha * hStereoDft->smooth_res_nrg[b] + ( 1 - alpha ) * rev_nrg;
2624 1033932 : hStereoDft->smooth_dmx_nrg[b] = alpha * hStereoDft->smooth_dmx_nrg[b] + ( 1 - alpha ) * dmx_nrg;
2625 :
2626 : /* normalization factor */
2627 1033932 : norm_fac = sqrtf( hStereoDft->smooth_dmx_nrg[b] / hStereoDft->smooth_res_nrg[b] );
2628 :
2629 : /* gain compressor */
2630 1033932 : norm_fac *= min( max( 0.8f, 1 / norm_fac ), 1.25f );
2631 :
2632 : /* gain limiter */
2633 1033932 : norm_fac = min( norm_fac, gain_limit );
2634 :
2635 21434598 : for ( i = hStereoDft->band_limits[b]; i < min( hStereoDft->band_limits[b + 1], bin0 ); i++ )
2636 : {
2637 20400666 : DFT_PRED_RES[2 * i] = norm_fac * pPredGain[b] * ap_filt_DMX[2 * i];
2638 20400666 : DFT_PRED_RES[2 * i + 1] = norm_fac * pPredGain[b] * ap_filt_DMX[2 * i + 1];
2639 : }
2640 : }
2641 : }
2642 106602 : else if ( hStereoDft->res_pred_mode[k + STEREO_DFT_OFFSET] == STEREO_DFT_RESPRED_STEFI )
2643 : {
2644 : /* stefi in lowband */
2645 73992 : set_zero( DFT_PRED_RES, 2 * hStereoDft->band_limits[lb_stefi_start_band] );
2646 :
2647 456582 : for ( b = lb_stefi_start_band; b <= band0; b++ )
2648 : {
2649 382590 : d_short_ind = STEREO_DFT_PAST_MAX - STEREO_DFT_STEFFI_DELAY_SHORT + b % 2;
2650 382590 : d_long_ind = max( 4, (int16_t) ( ( STEREO_DFT_PAST_MAX + 4 - 1 ) * ( (float) b / ( hStereoDft->nbands - 1 ) ) + 0.5f ) ) - 4;
2651 : /* make sure d_short really corresponds to a shorter or equally long delay than d_long (e.g. not always the case for
2652 : * STEREO_DFT_STEFFI_DELAY_SHORT=3 and STEREO_DFT_STEFFI_DELAY_LONG=4)*/
2653 382590 : d_short_ind = max( d_short_ind, d_long_ind );
2654 :
2655 : /* Even number of window sliding (assymmetric OLA) */
2656 382590 : d_short_ind = 2 * ( d_short_ind / 2 );
2657 382590 : d_long_ind = 2 * ( d_long_ind / 2 );
2658 :
2659 382590 : d_short = STEREO_DFT_PAST_MAX - d_short_ind;
2660 382590 : d_long = STEREO_DFT_PAST_MAX - d_long_ind;
2661 :
2662 382590 : d_short_ind = ( d_short_ind + hStereoDft->past_DMX_pos + 1 ) % STEREO_DFT_PAST_MAX;
2663 382590 : d_long_ind = ( d_long_ind + hStereoDft->past_DMX_pos + 1 ) % STEREO_DFT_PAST_MAX;
2664 :
2665 382590 : g_short = hStereoDft->stefi_short_gain;
2666 382590 : g_long = hStereoDft->stefi_long_gain;
2667 :
2668 : /* change mixing ratio if long and short delay are the same */
2669 382590 : if ( d_short == d_long )
2670 : {
2671 62574 : g_short = 1;
2672 62574 : g_long = 0;
2673 : }
2674 :
2675 : /* Avoid transient components */
2676 382590 : if ( hStereoDft->past_res_pred_gain[d_short_ind][b] == -1 && hStereoDft->past_res_pred_gain[d_long_ind][b] == -1 )
2677 : {
2678 14484 : g_long = 0.0f;
2679 14484 : g_short = 0.0f;
2680 : }
2681 368106 : else if ( hStereoDft->past_res_pred_gain[d_short_ind][b] == -1 )
2682 : {
2683 9234 : g_long = 1.0f;
2684 9234 : g_short = 0.0f;
2685 : }
2686 358872 : else if ( hStereoDft->past_res_pred_gain[d_long_ind][b] == -1 )
2687 : {
2688 9006 : g_long = 0.0f;
2689 9006 : g_short = 1.0f;
2690 : }
2691 :
2692 382590 : if ( max( g_short, g_long ) > 0 )
2693 : {
2694 368106 : past_dmx_nrg = EPSILON;
2695 368106 : dmx_nrg = EPSILON;
2696 10059618 : for ( i = hStereoDft->band_limits[b]; i < min( bin0, hStereoDft->band_limits[b + 1] ); i++ )
2697 : {
2698 9691512 : dmx_nrg += pDFT_DMX[2 * i] * pDFT_DMX[2 * i] + pDFT_DMX[2 * i + 1] * pDFT_DMX[2 * i + 1];
2699 :
2700 9691512 : 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] );
2701 9691512 : 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] );
2702 :
2703 9691512 : 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];
2704 : }
2705 368106 : if ( !bfi || b >= hStereoDft->res_cod_band_max )
2706 : {
2707 347526 : norm_fac = sqrtf( ( 0.001f + dmx_nrg ) / ( 0.001f + past_dmx_nrg ) );
2708 347526 : g2 = pPredGain[b] * norm_fac;
2709 347526 : pred_gain_avg = g_short * hStereoDft->past_res_pred_gain[d_short_ind][b] +
2710 347526 : g_long * hStereoDft->past_res_pred_gain[d_long_ind][b];
2711 :
2712 347526 : 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 );
2713 :
2714 9956718 : for ( i = hStereoDft->band_limits[b]; i < min( bin0, hStereoDft->band_limits[b + 1] ); i++ )
2715 : {
2716 9609192 : DFT_PRED_RES[2 * i] *= g2;
2717 9609192 : DFT_PRED_RES[2 * i + 1] *= g2;
2718 : }
2719 : }
2720 : }
2721 : else
2722 : {
2723 14484 : set_zero( DFT_PRED_RES + 2 * hStereoDft->band_limits[b], 2 * ( min( bin0, hStereoDft->band_limits[b + 1] ) - hStereoDft->band_limits[b] ) );
2724 : }
2725 : }
2726 : }
2727 :
2728 : #ifndef DEBUG_STEREO_DFT_NOCORE
2729 252048 : if ( hStereoDft->band_limits[nbands_respred] > bin0 )
2730 : {
2731 : /* apply stereo filling in ACELP BWE region */
2732 218238 : if ( hStereoDft->core_hist[0] == ACELP_CORE && hStereoDft->core_hist[STEREO_DFT_STEFFI_DELAY_SHORT / 2] == ACELP_CORE )
2733 : {
2734 : /* ACELP -> ACELP: nothing to do */
2735 127926 : *stop = bin0;
2736 : }
2737 90312 : else if ( hStereoDft->core_hist[STEREO_DFT_STEFFI_DELAY_SHORT / 2] == ACELP_CORE )
2738 : {
2739 : /* ACELP -> TCX/HQ core transition */
2740 : /* calculate high band energy only */
2741 6438 : dmx_nrg = EPSILON;
2742 1479846 : for ( i = bin0; i < hStereoDft->NFFT / 2; i++ )
2743 : {
2744 1473408 : dmx_nrg += pDFT_DMX[2 * i] * pDFT_DMX[2 * i] + pDFT_DMX[2 * i + 1] * pDFT_DMX[2 * i + 1];
2745 : }
2746 :
2747 6438 : hStereoDft->hb_nrg[0] += dmx_nrg * 2 / hStereoDft->NFFT;
2748 6438 : *stop = bin0;
2749 : }
2750 83874 : else if ( hStereoDft->core_hist[0] == ACELP_CORE )
2751 : {
2752 : /* TCX/HQ core -> ACELP transition */
2753 : /* apply short delay only and blend to long/short gain */
2754 4764 : dmx_nrg = hStereoDft->hb_nrg_subr[k];
2755 4764 : d_short_ind = STEREO_DFT_PAST_MAX - STEREO_DFT_TD_STEFI_SUBFR_DELAY;
2756 :
2757 4764 : d_short_ind = ( d_short_ind + hStereoDft->past_DMX_pos + 1 ) % STEREO_DFT_PAST_MAX;
2758 :
2759 : /* calculate high band energy of past dmx */
2760 4764 : past_dmx_nrg = EPSILON;
2761 697308 : for ( i = bin0; i < min( hStereoDft->NFFT / 2, STEREO_DFT32MS_N_32k / 2 ); i++ )
2762 : {
2763 692544 : 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];
2764 : }
2765 :
2766 16476 : for ( b = band0; b < nbands_respred; b++ )
2767 : {
2768 11712 : g_short = hStereoDft->past_res_pred_gain[d_short_ind][b] < 0 ? 0 : ( 1.f + hStereoDft->stefi_short_gain ) / 2;
2769 :
2770 11712 : if ( g_short > 0 )
2771 : {
2772 11136 : norm_fac = sqrtf( ( 0.001f + dmx_nrg ) / ( 0.001f + past_dmx_nrg ) );
2773 11136 : g2 = pPredGain[b] * norm_fac;
2774 11136 : pred_gain_avg = hStereoDft->past_res_pred_gain[d_short_ind][b] * g_short;
2775 :
2776 11136 : 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 );
2777 665280 : for ( i = max( hStereoDft->band_limits[b], bin0 ); i < min( hStereoDft->band_limits[b + 1], STEREO_DFT32MS_N_32k / 2 ); i++ )
2778 : {
2779 654144 : DFT_PRED_RES[2 * i] = g2 * hStereoDft->DFT_past_DMX[d_short_ind][2 * i];
2780 654144 : DFT_PRED_RES[2 * i + 1] = g2 * hStereoDft->DFT_past_DMX[d_short_ind][2 * i + 1];
2781 : }
2782 : }
2783 : else
2784 : {
2785 576 : begin = max( hStereoDft->band_limits[b], bin0 );
2786 576 : end = min( hStereoDft->band_limits[b + 1], STEREO_DFT32MS_N_32k / 2 );
2787 576 : set_zero( DFT_PRED_RES + 2 * begin, 2 * ( end - begin ) );
2788 : }
2789 : }
2790 : }
2791 : else
2792 : #endif
2793 : {
2794 258294 : for ( b = band0; b < nbands_respred; b++ )
2795 : {
2796 : /* TCX/HQ core -> TCX/HQ core: business as usual */
2797 179184 : d_short_ind = STEREO_DFT_PAST_MAX - STEREO_DFT_STEFFI_DELAY_SHORT + b % 2;
2798 179184 : d_long_ind = max( 4, (int16_t) ( ( STEREO_DFT_PAST_MAX + 4 - 1 ) * ( (float) b / ( hStereoDft->nbands - 1 ) ) + 0.5f ) ) - 4;
2799 : /* make sure d_short really corresponds to a shorter or equally long delay than d_long (e.g. not always the case for
2800 : * STEREO_DFT_STEFFI_DELAY_SHORT=3 and STEREO_DFT_STEFFI_DELAY_LONG=4)*/
2801 179184 : d_short_ind = max( d_short_ind, d_long_ind );
2802 :
2803 : /* Even number of window sliding (assymmetric OLA) */
2804 179184 : d_short_ind = 2 * ( d_short_ind / 2 );
2805 179184 : d_long_ind = 2 * ( d_long_ind / 2 );
2806 :
2807 179184 : d_short = STEREO_DFT_PAST_MAX - d_short_ind;
2808 179184 : d_long = STEREO_DFT_PAST_MAX - d_long_ind;
2809 :
2810 179184 : d_short_ind = ( d_short_ind + hStereoDft->past_DMX_pos + 1 ) % STEREO_DFT_PAST_MAX;
2811 179184 : d_long_ind = ( d_long_ind + hStereoDft->past_DMX_pos + 1 ) % STEREO_DFT_PAST_MAX;
2812 :
2813 179184 : g_short = hStereoDft->stefi_short_gain;
2814 179184 : g_long = hStereoDft->stefi_long_gain;
2815 :
2816 : /* change mixing ratio if long and short delay are the same */
2817 179184 : if ( d_short == d_long )
2818 : {
2819 167226 : g_short = 1;
2820 167226 : g_long = 0;
2821 : }
2822 :
2823 : /* Avoid transient components */
2824 179184 : if ( hStereoDft->past_res_pred_gain[d_short_ind][b] == -1 && hStereoDft->past_res_pred_gain[d_long_ind][b] == -1 )
2825 : {
2826 5718 : g_long = 0.0f;
2827 5718 : g_short = 0.0f;
2828 : }
2829 173466 : else if ( hStereoDft->past_res_pred_gain[d_short_ind][b] == -1 )
2830 : {
2831 120 : g_long = 1.0f;
2832 120 : g_short = 0.0f;
2833 : }
2834 173346 : else if ( hStereoDft->past_res_pred_gain[d_long_ind][b] == -1 )
2835 : {
2836 180 : g_long = 0.0f;
2837 180 : g_short = 1.0f;
2838 : }
2839 : #ifndef DEBUG_STEREO_DFT_NOCORE
2840 179184 : if ( hStereoDft->core_hist[d_short / 2] == ACELP_CORE )
2841 : {
2842 0 : g_short = 0;
2843 : }
2844 179184 : if ( hStereoDft->core_hist[d_long / 2] == ACELP_CORE )
2845 : {
2846 1140 : g_long = 0;
2847 : }
2848 : #endif
2849 :
2850 179184 : if ( max( g_short, g_long ) > 0 )
2851 : {
2852 173208 : past_dmx_nrg = EPSILON;
2853 173208 : dmx_nrg = EPSILON;
2854 11280864 : for ( i = max( hStereoDft->band_limits[b], bin0 ); i < min( hStereoDft->band_limits[b + 1], STEREO_DFT32MS_N_32k / 2 ); i++ )
2855 : {
2856 11107656 : dmx_nrg += pDFT_DMX[2 * i] * pDFT_DMX[2 * i] + pDFT_DMX[2 * i + 1] * pDFT_DMX[2 * i + 1];
2857 :
2858 11107656 : 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] );
2859 11107656 : 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] );
2860 :
2861 11107656 : 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];
2862 : }
2863 :
2864 173208 : norm_fac = sqrtf( ( 0.001f + dmx_nrg ) / ( 0.001f + past_dmx_nrg ) );
2865 173208 : g2 = pPredGain[b] * norm_fac;
2866 173208 : 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];
2867 :
2868 173208 : 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 );
2869 :
2870 11280864 : for ( i = max( hStereoDft->band_limits[b], bin0 ); i < min( hStereoDft->band_limits[b + 1], STEREO_DFT32MS_N_32k / 2 ); i++ )
2871 : {
2872 11107656 : DFT_PRED_RES[2 * i] *= g2;
2873 11107656 : DFT_PRED_RES[2 * i + 1] *= g2;
2874 : }
2875 : }
2876 : else
2877 : {
2878 5976 : begin = max( hStereoDft->band_limits[b], bin0 );
2879 5976 : end = min( hStereoDft->band_limits[b + 1], STEREO_DFT32MS_N_32k / 2 );
2880 5976 : set_zero( DFT_PRED_RES + 2 * begin, 2 * ( end - begin ) );
2881 : }
2882 : }
2883 : }
2884 : #ifndef DEBUG_STEREO_DFT_NOCORE
2885 : }
2886 : #endif
2887 :
2888 : /* update buffers */
2889 2118102 : for ( b = hStereoDft->res_pred_band_min; b < hStereoDft->nbands; b++ )
2890 : {
2891 1866054 : if ( hStereoDft->attackPresent || hStereoDft->wasTransient )
2892 : {
2893 101568 : hStereoDft->past_res_pred_gain[( hStereoDft->past_DMX_pos + 1 ) % STEREO_DFT_PAST_MAX][b] = -1;
2894 : }
2895 : else
2896 : {
2897 1764486 : hStereoDft->past_res_pred_gain[( hStereoDft->past_DMX_pos + 1 ) % STEREO_DFT_PAST_MAX][b] = pPredGain[b];
2898 : }
2899 : }
2900 :
2901 252048 : pop_wmops();
2902 252048 : return;
2903 : }
2904 :
2905 :
2906 : /*---------------------------------------------------------------
2907 : * stereo_dft_dec_smooth_parameters()
2908 : *
2909 : *
2910 : * ---------------------------------------------------------------*/
2911 :
2912 125208 : void stereo_dft_dec_smooth_parameters(
2913 : STEREO_DFT_DEC_DATA_HANDLE hStereoDft, /* i/o: decoder DFT stereo handle */
2914 : const int16_t prev_sid_nodata, /* i : Previous SID/No data indicator */
2915 : const int16_t active_frame_counter, /* i : Active frame counter */
2916 : const int32_t element_brate /* i : Element bitrate */
2917 : )
2918 : {
2919 : int16_t k_offset, k, k2, b, N_div;
2920 : float *pIpd, *pInterpol;
2921 : float *pgIpd;
2922 : float *pSideGain;
2923 : float diff_ipd;
2924 : int16_t nbands;
2925 : int16_t max_res_pred_ind;
2926 :
2927 125208 : N_div = STEREO_DFT_NBDIV;
2928 125208 : k_offset = STEREO_DFT_OFFSET;
2929 :
2930 125208 : if ( hStereoDft->frame_sid_nodata || prev_sid_nodata )
2931 : {
2932 17019 : k = 1;
2933 114144 : for ( b = 0; b < hStereoDft->nbands; b++ )
2934 : {
2935 97125 : *( hStereoDft->side_gain + ( ( k + k_offset ) - 1 ) * STEREO_DFT_BAND_MAX + b ) = *( hStereoDft->side_gain + ( k + k_offset ) * STEREO_DFT_BAND_MAX + b );
2936 : }
2937 :
2938 17019 : if ( hStereoDft->frame_sid_nodata )
2939 : {
2940 : /* set new xfade target if new itd received */
2941 16305 : if ( hStereoDft->ipd_xfade_counter < STEREO_DFT_ITD_CNG_XFADE )
2942 : {
2943 16014 : if ( ( hStereoDft->gipd[k + k_offset] - hStereoDft->ipd_xfade_prev ) > EVS_PI )
2944 : {
2945 0 : hStereoDft->ipd_xfade_target = hStereoDft->gipd[k + k_offset] - 2 * EVS_PI;
2946 0 : hStereoDft->ipd_xfade_step = ( hStereoDft->ipd_xfade_target - hStereoDft->ipd_xfade_prev ) / ( STEREO_DFT_ITD_CNG_XFADE - hStereoDft->ipd_xfade_counter );
2947 : }
2948 16014 : else if ( ( hStereoDft->ipd_xfade_prev - hStereoDft->gipd[k + k_offset] ) > EVS_PI )
2949 : {
2950 102 : hStereoDft->ipd_xfade_target = hStereoDft->gipd[k + k_offset] + 2 * EVS_PI;
2951 102 : hStereoDft->ipd_xfade_step = ( hStereoDft->ipd_xfade_target - hStereoDft->ipd_xfade_prev ) / ( STEREO_DFT_ITD_CNG_XFADE - hStereoDft->ipd_xfade_counter );
2952 : }
2953 : else
2954 : {
2955 15912 : hStereoDft->ipd_xfade_target = hStereoDft->gipd[k + k_offset];
2956 15912 : hStereoDft->ipd_xfade_step = ( hStereoDft->ipd_xfade_target - hStereoDft->ipd_xfade_prev ) / ( STEREO_DFT_ITD_CNG_XFADE - hStereoDft->ipd_xfade_counter );
2957 : }
2958 : }
2959 :
2960 : /* xfade */
2961 16305 : if ( hStereoDft->ipd_xfade_prev != hStereoDft->ipd_xfade_target && hStereoDft->ipd_xfade_counter < STEREO_DFT_ITD_CNG_XFADE && hStereoDft->last_active_element_brate <= 24400 )
2962 : {
2963 5892 : hStereoDft->gipd[k + k_offset] = hStereoDft->ipd_xfade_prev + hStereoDft->ipd_xfade_step;
2964 5892 : hStereoDft->ipd_xfade_prev = hStereoDft->gipd[k + k_offset];
2965 5892 : hStereoDft->ipd_xfade_counter++;
2966 : }
2967 : }
2968 : else
2969 : {
2970 : /* First active frame, "reset" everything if long enough active encoding, only triggered if STEREO_DFT_ITD_CNG_XFADE_RESET = -1 */
2971 714 : if ( active_frame_counter > STEREO_DFT_ITD_CNG_XFADE_RESET )
2972 : {
2973 0 : hStereoDft->ipd_xfade_target = hStereoDft->gipd[k + k_offset];
2974 0 : hStereoDft->ipd_xfade_prev = hStereoDft->gipd[k + k_offset];
2975 0 : hStereoDft->ipd_xfade_counter = 0;
2976 : }
2977 : }
2978 :
2979 34038 : for ( k2 = 1; k2 < hStereoDft->prm_res[k + k_offset]; k2++ )
2980 : {
2981 17019 : hStereoDft->gipd[( k + k_offset ) - k2] = hStereoDft->gipd[k + k_offset];
2982 : }
2983 :
2984 17019 : if ( hStereoDft->frame_sid_nodata )
2985 : {
2986 : /* set new xfade target if new itd received */
2987 16305 : if ( hStereoDft->itd_xfade_counter < STEREO_DFT_ITD_CNG_XFADE )
2988 : {
2989 16305 : hStereoDft->itd_xfade_target = hStereoDft->itd[k + k_offset];
2990 16305 : hStereoDft->itd_xfade_step = ( hStereoDft->itd_xfade_target - hStereoDft->itd_xfade_prev ) / ( STEREO_DFT_ITD_CNG_XFADE - hStereoDft->itd_xfade_counter );
2991 : }
2992 :
2993 : /* xfade */
2994 16305 : if ( hStereoDft->itd_xfade_prev != hStereoDft->itd_xfade_target && hStereoDft->itd_xfade_counter < STEREO_DFT_ITD_CNG_XFADE && hStereoDft->last_active_element_brate <= 24400 )
2995 : {
2996 873 : hStereoDft->itd[k + k_offset] = hStereoDft->itd_xfade_prev + hStereoDft->itd_xfade_step;
2997 873 : hStereoDft->itd_xfade_prev = hStereoDft->itd[k + k_offset];
2998 873 : hStereoDft->itd_xfade_counter++;
2999 : }
3000 : }
3001 : else
3002 : {
3003 : /* First active frame, "reset" everything if long enough active encoding, only triggered if STEREO_DFT_ITD_CNG_XFADE_RESET = -1 */
3004 714 : if ( active_frame_counter > STEREO_DFT_ITD_CNG_XFADE_RESET )
3005 : {
3006 0 : hStereoDft->itd_xfade_target = hStereoDft->itd[k + k_offset];
3007 0 : hStereoDft->itd_xfade_prev = hStereoDft->itd[k + k_offset];
3008 0 : hStereoDft->itd_xfade_counter = 0;
3009 : }
3010 :
3011 714 : hStereoDft->last_active_element_brate = element_brate;
3012 : }
3013 34038 : for ( k2 = 1; k2 < hStereoDft->prm_res[k + k_offset]; k2++ )
3014 : {
3015 17019 : hStereoDft->itd[( k + k_offset ) - k2] = hStereoDft->itd[k + k_offset];
3016 : }
3017 :
3018 17019 : return;
3019 : }
3020 :
3021 : /* Active frame, "reset" everything "reset" everything if long enough active encoding */
3022 108189 : if ( active_frame_counter > STEREO_DFT_ITD_CNG_XFADE_RESET )
3023 : {
3024 104586 : hStereoDft->itd_xfade_counter = 0;
3025 104586 : hStereoDft->itd_xfade_target = hStereoDft->itd[STEREO_DFT_NBDIV - 1];
3026 104586 : hStereoDft->itd_xfade_prev = hStereoDft->itd[STEREO_DFT_NBDIV - 1];
3027 104586 : hStereoDft->ipd_xfade_counter = 0;
3028 104586 : hStereoDft->ipd_xfade_target = hStereoDft->gipd[STEREO_DFT_NBDIV - 1];
3029 104586 : hStereoDft->ipd_xfade_prev = hStereoDft->gipd[STEREO_DFT_NBDIV - 1];
3030 : }
3031 :
3032 108189 : hStereoDft->last_active_element_brate = element_brate;
3033 :
3034 216378 : for ( k = hStereoDft->prm_res[k_offset] - 1; k < N_div; k += hStereoDft->prm_res[k + k_offset] )
3035 : {
3036 108189 : max_res_pred_ind = 0;
3037 :
3038 108189 : if ( hStereoDft->reverb_flag == 1 )
3039 : {
3040 15117 : nbands = min( 10, hStereoDft->nbands_respred );
3041 :
3042 : /*Shift 2 last bands residual prediction gains for SWB/FB*/
3043 15117 : if ( hStereoDft->band_res[k_offset] == STEREO_DFT_BAND_RES_HIGH )
3044 : {
3045 16500 : for ( b = hStereoDft->nbands_respred - 1; b >= nbands; b-- )
3046 : {
3047 10266 : hStereoDft->res_gains_ind[1][b + STEREO_DFT_BAND_MAX] =
3048 10266 : hStereoDft->res_gains_ind[1][b - STEREO_DFT_RES_PRED_BAND_MIN_RED + hStereoDft->res_pred_band_min + STEREO_DFT_BAND_MAX];
3049 10266 : hStereoDft->res_gains_ind[1][b - STEREO_DFT_RES_PRED_BAND_MIN_RED + hStereoDft->res_pred_band_min + STEREO_DFT_BAND_MAX] = 0;
3050 : }
3051 : }
3052 :
3053 : /* Get maximal index */
3054 82986 : for ( b = hStereoDft->res_pred_band_min; b < ( nbands - STEREO_DFT_RES_PRED_BAND_MIN_CONST ); b++ )
3055 : {
3056 67869 : if ( max_res_pred_ind < hStereoDft->res_gains_ind[1][b + STEREO_DFT_BAND_MAX] )
3057 : {
3058 26448 : max_res_pred_ind = (int16_t) hStereoDft->res_gains_ind[1][b + STEREO_DFT_BAND_MAX];
3059 : }
3060 : }
3061 :
3062 : /* predictive values */
3063 60468 : for ( ; b < nbands; b++ )
3064 : {
3065 45351 : assert( hStereoDft->res_gains_ind[1][b + STEREO_DFT_BAND_MAX] == 0 );
3066 45351 : hStereoDft->res_gains_ind[1][b + STEREO_DFT_BAND_MAX] = max_res_pred_ind;
3067 : }
3068 : }
3069 :
3070 108189 : for ( b = hStereoDft->res_pred_band_min; b < hStereoDft->res_cod_band_max; b++ )
3071 : {
3072 : float tmp;
3073 : int16_t tmps1, tmps2;
3074 :
3075 0 : hStereoDft->res_gains_ind[0][b] = hStereoDft->res_gains_ind[0][b + STEREO_DFT_BAND_MAX];
3076 : /*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);*/
3077 0 : tmps1 = (int16_t) ( hStereoDft->res_gains_ind[0][b] );
3078 0 : tmps2 = (int16_t) ( hStereoDft->res_gains_ind[1][b + STEREO_DFT_BAND_MAX] );
3079 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 );
3080 :
3081 0 : if ( hStereoDft->attackPresent )
3082 : {
3083 0 : hStereoDft->res_gains_ind[1][b] = 0.8f * hStereoDft->res_gains_ind[1][b];
3084 : }
3085 0 : else if ( hStereoDft->trans || ( hStereoDft->res_pred_mode[k] && ( hStereoDft->res_gains_ind[1][b + STEREO_DFT_BAND_MAX] < 2.f ) ) )
3086 : {
3087 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];
3088 : }
3089 : else
3090 : {
3091 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];
3092 : }
3093 :
3094 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 );
3095 : }
3096 :
3097 : /* Smoothing of prediction gains between ftrames */
3098 893226 : for ( ; b < hStereoDft->nbands; b++ )
3099 : {
3100 785037 : if ( hStereoDft->attackPresent )
3101 : {
3102 28530 : hStereoDft->res_gains_ind[0][b] = hStereoDft->res_gains_ind[0][b + STEREO_DFT_BAND_MAX];
3103 28530 : hStereoDft->res_gains_ind[1][b] = 0.8f * hStereoDft->res_gains_ind[1][b];
3104 : }
3105 756507 : else if ( hStereoDft->trans || ( hStereoDft->res_pred_mode[k] && ( hStereoDft->res_gains_ind[1][b + STEREO_DFT_BAND_MAX] < 2.f ) ) )
3106 : {
3107 435813 : hStereoDft->res_gains_ind[0][b] = hStereoDft->res_gains_ind[0][b + STEREO_DFT_BAND_MAX];
3108 :
3109 435813 : if ( hStereoDft->hConfig->band_res == STEREO_DFT_BAND_RES_LOW )
3110 : {
3111 98928 : 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];
3112 : }
3113 : else
3114 : {
3115 336885 : 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];
3116 : }
3117 : }
3118 : else
3119 : {
3120 320694 : if ( hStereoDft->hConfig->band_res == STEREO_DFT_BAND_RES_LOW )
3121 : {
3122 91818 : 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];
3123 91818 : 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];
3124 : }
3125 : else
3126 : {
3127 228876 : 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];
3128 228876 : 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];
3129 : }
3130 : }
3131 :
3132 785037 : if ( !hStereoDft->recovery_flg )
3133 : {
3134 783966 : 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 );
3135 : }
3136 : }
3137 :
3138 : /* Smoothing of IPDs*/
3139 108189 : pgIpd = hStereoDft->gipd + ( k + k_offset );
3140 108189 : diff_ipd = pgIpd[0] - pgIpd[-hStereoDft->prm_res[k + k_offset]];
3141 108189 : if ( diff_ipd < -EVS_PI )
3142 : {
3143 2115 : pgIpd[0] += PI2;
3144 : }
3145 106074 : else if ( diff_ipd > EVS_PI )
3146 : {
3147 714 : pgIpd[0] -= PI2;
3148 : }
3149 :
3150 108189 : if ( !hStereoDft->attackPresent )
3151 : {
3152 104268 : if ( hStereoDft->wasTransient )
3153 : {
3154 3777 : pgIpd[0] = 0.8f * pgIpd[0] + 0.2f * pgIpd[-hStereoDft->prm_res[k + k_offset]];
3155 : }
3156 : else
3157 : {
3158 100491 : pgIpd[0] = 0.5f * pgIpd[0] + 0.5f * pgIpd[-hStereoDft->prm_res[k + k_offset]];
3159 : }
3160 : }
3161 :
3162 :
3163 108189 : if ( !hStereoDft->attackPresent )
3164 : {
3165 104268 : pSideGain = hStereoDft->side_gain + ( k + k_offset ) * STEREO_DFT_BAND_MAX;
3166 349158 : for ( b = 0; b < hStereoDft->res_cod_band_max; b++ )
3167 : {
3168 244890 : 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];
3169 : }
3170 : }
3171 :
3172 : /*Interpolation between DFT slots*/
3173 216378 : for ( k2 = 1; k2 < hStereoDft->prm_res[k + k_offset]; k2++ )
3174 : {
3175 108189 : pInterpol = hStereoDft->gipd + ( ( k + k_offset ) - k2 );
3176 108189 : pIpd = hStereoDft->gipd + ( k + k_offset );
3177 108189 : if ( hStereoDft->attackPresent )
3178 : {
3179 3921 : *( pInterpol ) = *( pIpd );
3180 : }
3181 : else
3182 : {
3183 104268 : *( pInterpol ) = *( hStereoDft->gipd + ( k + k_offset - hStereoDft->prm_res[k + k_offset] ) );
3184 : }
3185 :
3186 1146651 : for ( b = 0; b < hStereoDft->nbands; b++ )
3187 : {
3188 1038462 : *( 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 );
3189 :
3190 1038462 : 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 ) ) )
3191 : {
3192 717768 : *( hStereoDft->side_gain + ( ( k + k_offset ) - k2 ) * STEREO_DFT_BAND_MAX + b ) = *( hStereoDft->side_gain + ( k + k_offset ) * STEREO_DFT_BAND_MAX + b );
3193 : }
3194 : else
3195 : {
3196 320694 : *( 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 );
3197 : }
3198 : }
3199 :
3200 108189 : hStereoDft->itd[( k + k_offset ) - k2] = hStereoDft->itd[k + k_offset];
3201 : } /*end of interpolation*/
3202 : }
3203 :
3204 108189 : return;
3205 : }
3206 :
3207 :
3208 : /*---------------------------------------------------------------
3209 : * stereo_dft_adapt_sf_delay()
3210 : *
3211 : *
3212 : * ---------------------------------------------------------------*/
3213 :
3214 288114 : static void stereo_dft_adapt_sf_delay(
3215 : STEREO_DFT_DEC_DATA_HANDLE hStereoDft,
3216 : float *pPredGain )
3217 : {
3218 : float var_mean_ratio;
3219 : float new_variation;
3220 : float target_delay;
3221 : float max_pg, sum_pg, alpha_up, alpha_down;
3222 : int16_t b;
3223 :
3224 288114 : max_pg = 0.0f;
3225 288114 : sum_pg = 0.0f;
3226 :
3227 : /* find sum and maximum of prediction gains */
3228 2584224 : for ( b = hStereoDft->res_pred_band_min; b < hStereoDft->nbands; b++ )
3229 : {
3230 2296110 : if ( pPredGain[b] > max_pg )
3231 : {
3232 622548 : max_pg = pPredGain[b];
3233 : }
3234 2296110 : sum_pg += pPredGain[b];
3235 : }
3236 :
3237 288114 : if ( sum_pg > 0.0f )
3238 : {
3239 : /* Calculate mean of the prediction gain */
3240 264699 : hStereoDft->lt_pred_gain = STEREO_DFT_LT_PREDGAIN_UPD * sum_pg + ( 1.0f - STEREO_DFT_LT_PREDGAIN_UPD ) * hStereoDft->lt_pred_gain;
3241 :
3242 : /* Calculate the variation of the prediction gain */
3243 264699 : new_variation = fabsf( sum_pg - hStereoDft->lt_pred_gain );
3244 264699 : hStereoDft->lt_pred_gain_variation = STEREO_DFT_VR_PREDGAIN_UPD * new_variation + ( 1.0f - STEREO_DFT_VR_PREDGAIN_UPD ) * hStereoDft->lt_pred_gain_variation;
3245 : }
3246 :
3247 : /* Calculate ratio of variation and mean of prediction gain */
3248 288114 : var_mean_ratio = STEREO_DFT_RES_RATIO_LIMIT;
3249 288114 : if ( hStereoDft->lt_pred_gain > 0.0f )
3250 : {
3251 282609 : var_mean_ratio = min( 1.5f * STEREO_DFT_RES_RATIO_LIMIT, hStereoDft->lt_pred_gain_variation / hStereoDft->lt_pred_gain );
3252 : }
3253 :
3254 288114 : if ( max_pg > STEREO_DFT_STEFFI_PG_THRESHOLD )
3255 : {
3256 : /* slow upwards */
3257 155970 : alpha_up = STEREO_DFT_STEFFI_RATIO_UP_HIGH;
3258 155970 : alpha_down = STEREO_DFT_STEFFI_RATIO_DOWN_HIGH;
3259 : }
3260 : else
3261 : {
3262 : /* slow downwards */
3263 132144 : alpha_up = STEREO_DFT_STEFFI_RATIO_UP_LOW;
3264 132144 : alpha_down = STEREO_DFT_STEFFI_RATIO_DOWN_LOW;
3265 : }
3266 :
3267 288114 : if ( var_mean_ratio > hStereoDft->lt_var_mean_ratio )
3268 : {
3269 83166 : hStereoDft->lt_var_mean_ratio = alpha_up * var_mean_ratio + ( 1.0f - alpha_up ) * hStereoDft->lt_var_mean_ratio;
3270 : }
3271 : else
3272 : {
3273 204948 : hStereoDft->lt_var_mean_ratio = alpha_down * var_mean_ratio + ( 1.0f - alpha_down ) * hStereoDft->lt_var_mean_ratio;
3274 : }
3275 :
3276 : /* Calculate a target delay for the stereo filling. Set the stereo filling delay lower when the prediction gain
3277 : variation is relatively high compared to the mean */
3278 288114 : if ( hStereoDft->lt_var_mean_ratio >= STEREO_DFT_RES_RATIO_LIMIT )
3279 : {
3280 108468 : target_delay = STEREO_DFT_STEFFI_DELAY_SHORT;
3281 : }
3282 : else
3283 : {
3284 179646 : 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 ) );
3285 : }
3286 :
3287 : /* Adapt the stereo filling delay by interpolating between two delay taps, one at the shortest delay and one at the longest delay */
3288 288114 : hStereoDft->stefi_short_gain = ( STEREO_DFT_STEFFI_DELAY_LONG - target_delay ) / ( STEREO_DFT_STEFFI_DELAY_LONG - STEREO_DFT_STEFFI_DELAY_SHORT );
3289 288114 : hStereoDft->stefi_long_gain = sqrtf( 1.0f - hStereoDft->stefi_short_gain * hStereoDft->stefi_short_gain );
3290 :
3291 : #ifdef DEBUG_MODE_DFT
3292 : dbgwrite( &hStereoDft->lt_pred_gain, sizeof( float ), 1, 1, "res/stereo_dft_lt_pred_gain_b.pcm" );
3293 : dbgwrite( &hStereoDft->lt_pred_gain_variation, sizeof( float ), 1, 1, "res/stereo_dft_lt_pred_gain_variance_b.pcm" );
3294 : dbgwrite( &hStereoDft->lt_var_mean_ratio, sizeof( float ), 1, 1, "res/stereo_dft_lt_var_mean_ratio_b.pcm" );
3295 : dbgwrite( &target_delay, sizeof( float ), 1, 1, "res/stereo_dft_target_delay.pcm" );
3296 : dbgwrite( &hStereoDft->stefi_short_gain, sizeof( float ), 1, 1, "res/stereo_dft_short_gain.pcm" );
3297 : dbgwrite( &hStereoDft->stefi_long_gain, sizeof( float ), 1, 1, "res/stereo_dft_long_gain.pcm" );
3298 : #endif /* DEBUG_MODE_DFT */
3299 :
3300 288114 : return;
3301 : }
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