Line data Source code
1 : /******************************************************************************************************
2 :
3 : (C) 2022-2026 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 : /*====================================================================================
34 : EVS Codec 3GPP TS26.443 Nov 04, 2021. Version 12.14.0 / 13.10.0 / 14.6.0 / 15.4.0 / 16.3.0
35 : ====================================================================================*/
36 :
37 : #include <assert.h>
38 : #include <stdint.h>
39 : #include "options.h"
40 : #ifdef DEBUGGING
41 : #include "debug.h"
42 : #endif
43 : #include <math.h>
44 : #include "cnst.h"
45 : #include "rom_enc.h"
46 : #include "rom_com.h"
47 : #include "prot.h"
48 : #include "ivas_prot.h"
49 : #include "wmc_auto.h"
50 :
51 : /*-------------------------------------------------------------------*
52 : * Local constants
53 : *-------------------------------------------------------------------*/
54 :
55 : #define BWD_MIN_BRATE_WIDER_BW_MDCT IVAS_48k
56 : #define BWD_MIN_BRATE_WIDER_BW_MASA IVAS_48k
57 : #define BWD_MIN_BRATE_WIDER_BW_ISM IVAS_32k
58 : #define BWD_MAX_BRATE_WIDER_BW_MDCT IVAS_80k
59 : #define BWD_MAX_BRATE_WIDER_BW_ISM IVAS_64k
60 :
61 : #define ALPHA_BWD 0.75f
62 : #define BWD_LT_THRESH 0.6f
63 :
64 : #define BWD_COUNT_MAX 100
65 : #define BWD_COUNT_WIDER_BW 10
66 : #define BWD_COUNT_WIDER_BW_MDCT 0
67 :
68 : #define CLDFB_ENER_OFFSET 1.6f
69 :
70 : /*-------------------------------------------------------------------*
71 : * bw_detect()
72 : *
73 : * bandwidth detector
74 : *-------------------------------------------------------------------*/
75 :
76 2983174 : void bw_detect(
77 : Encoder_State *st, /* i/o: Encoder State */
78 : const float signal_in[], /* i : input signal */
79 : float *spectrum, /* i : MDCT spectrum */
80 : const float *enerBuffer, /* i : energy buffer */
81 : const IVAS_FORMAT ivas_format, /* i : IVAS format */
82 : const int16_t mct_on /* i : flag MCT mode */
83 : )
84 : {
85 : int16_t i, j, k, bw_max, bin_width, n_bins;
86 : float spect[L_FRAME48k], in_win[BWD_TOTAL_WIDTH];
87 : float spect_bin[BWD_N_BINS_MAX];
88 : float cldfb_bin[9];
89 : const float *pt, *pt1;
90 : float max_NB, max_WB, max_SWB, max_FB, mean_NB, mean_WB, mean_SWB, mean_FB;
91 2983174 : int16_t cldfb_bin_width = 4;
92 : int16_t bwd_count_wider_bw, l_frame;
93 :
94 2983174 : bwd_count_wider_bw = BWD_COUNT_WIDER_BW;
95 2983174 : if ( st->ini_frame > 0 && ( ( st->element_mode == IVAS_CPE_MDCT && ( st->element_brate >= BWD_MIN_BRATE_WIDER_BW_MDCT || mct_on ) ) ||
96 876920 : ( st->is_ism_format && st->element_brate >= BWD_MIN_BRATE_WIDER_BW_ISM ) ||
97 72700 : ( ivas_format == MASA_FORMAT && st->element_brate >= BWD_MIN_BRATE_WIDER_BW_MASA ) ) )
98 : {
99 2443297 : bwd_count_wider_bw = BWD_COUNT_WIDER_BW_MDCT;
100 : }
101 :
102 2983174 : if ( st->input_Fs > 8000 )
103 : {
104 2982374 : if ( enerBuffer != NULL )
105 : {
106 : float ScalFac;
107 :
108 887006 : ScalFac = 1 / ( st->cldfbAnaEnc->scale * st->cldfbAnaEnc->scale * 8.f );
109 887006 : set_f( cldfb_bin, 0.001f, 9 );
110 :
111 : /* NB: 1.2 - 2.8 kHz, 4 cldfb-bands*/
112 887006 : cldfb_bin[0] += sum_f( &( enerBuffer[3] ), cldfb_bin_width );
113 :
114 : /* WB: 4.4 - 7.2 kHz, 8 cldfb-bands, mid band(14) counted twice */
115 887006 : if ( st->input_Fs >= 16000 )
116 : {
117 887006 : cldfb_bin[1] += sum_f( &( enerBuffer[11] ), cldfb_bin_width );
118 887006 : cldfb_bin[2] += sum_f( &( enerBuffer[14] ), cldfb_bin_width );
119 : }
120 :
121 : /* SWB: 9.2 - 15.6 kHz, 16 cldfb-bands */
122 887006 : if ( st->input_Fs >= 32000 )
123 : {
124 820036 : cldfb_bin[3] += sum_f( &( enerBuffer[23] ), cldfb_bin_width );
125 820036 : cldfb_bin[4] += sum_f( &( enerBuffer[27] ), cldfb_bin_width );
126 820036 : cldfb_bin[5] += sum_f( &( enerBuffer[31] ), cldfb_bin_width );
127 820036 : cldfb_bin[6] += sum_f( &( enerBuffer[35] ), cldfb_bin_width );
128 : }
129 :
130 : /* FB: 16.8 - 20.0 kHz, 8 cldfb-bands */
131 887006 : if ( st->input_Fs >= 48000 )
132 : {
133 714778 : cldfb_bin[7] += sum_f( &( enerBuffer[42] ), cldfb_bin_width );
134 714778 : cldfb_bin[8] += sum_f( &( enerBuffer[46] ), cldfb_bin_width );
135 : }
136 :
137 8870060 : for ( i = 0; i < 9; i++ )
138 : {
139 7983054 : cldfb_bin[i] = (float) log10( cldfb_bin[i] * ScalFac ); /* see formula used in perform_noise_estimation_enc() for CNG */
140 : }
141 : }
142 : else
143 : {
144 : /* set width of a speactral bin (corresponds to 1.5kHz) */
145 2095368 : if ( st->input_Fs == 16000 )
146 : {
147 135320 : bw_max = WB;
148 135320 : bin_width = 60;
149 135320 : n_bins = 5; /* spectrum to 7.5 kHz */
150 : }
151 1960048 : else if ( st->input_Fs == 32000 )
152 : {
153 255577 : bw_max = SWB;
154 255577 : bin_width = 30;
155 255577 : n_bins = 10; /* spectrum to 15 kHz */
156 : }
157 : else /* st->input_Fs == 48000 */
158 : {
159 1704471 : bw_max = FB;
160 1704471 : bin_width = 20;
161 1704471 : n_bins = BWD_N_BINS_MAX; /* spectrum to 19.5 kHz */
162 : }
163 :
164 2095368 : if ( signal_in != NULL )
165 : {
166 : /*---------------------------------------------------------------------*
167 : * windowing of the input signal
168 : *---------------------------------------------------------------------*/
169 :
170 2040 : pt = signal_in;
171 2040 : pt1 = hann_window_320;
172 :
173 : /* 1st half of the window */
174 328440 : for ( i = 0; i < BWD_TOTAL_WIDTH / 2; i++ )
175 : {
176 326400 : in_win[i] = *pt++ * *pt1++;
177 : }
178 2040 : pt1--;
179 :
180 : /* 2nd half of the window */
181 328440 : for ( ; i < BWD_TOTAL_WIDTH; i++ )
182 : {
183 326400 : in_win[i] = *pt++ * *pt1--;
184 : }
185 :
186 : /*---------------------------------------------------------------------*
187 : * tranform into frequency domain
188 : *---------------------------------------------------------------------*/
189 :
190 2040 : edct( in_win, spect, BWD_TOTAL_WIDTH, st->element_mode );
191 : }
192 : else
193 : {
194 2093328 : l_frame = (int16_t) ( st->input_Fs / FRAMES_PER_SEC );
195 2093328 : if ( st->core == TCX_10_CORE )
196 : {
197 132352 : l_frame /= 2;
198 : }
199 :
200 2093328 : bin_width *= ( l_frame / BWD_TOTAL_WIDTH );
201 2093328 : mvr2r( spectrum, spect, l_frame );
202 : }
203 : /*---------------------------------------------------------------------*
204 : * compute energy per spectral bins
205 : *---------------------------------------------------------------------*/
206 :
207 2095368 : set_f( spect_bin, 0.001f, n_bins );
208 :
209 9950623 : for ( k = 0; k <= bw_max; k++ )
210 : {
211 25390493 : for ( i = bwd_start_bin[k]; i <= bwd_end_bin[k]; i++ )
212 : {
213 1025665858 : for ( j = 0; j < bin_width; j++ )
214 : {
215 1008130620 : spect_bin[i] += spect[i * bin_width + j] * spect[i * bin_width + j];
216 : }
217 17535238 : spect_bin[i] = (float) log10( spect_bin[i] );
218 : }
219 : }
220 : }
221 :
222 2982374 : if ( enerBuffer != NULL )
223 : {
224 : /* cldfb detections */
225 887006 : mean_NB = mean( cldfb_bin, 1 ); /* NB: 1.2 - 2.8 kHz, 4 cldfb-bands (1 bin) */
226 887006 : maximum( cldfb_bin, 1, &max_NB );
227 887006 : mean_WB = mean( cldfb_bin + 1, 2 ); /* WB: 4.4 - 7.2 kHz, 8 cldfb-bands (2 bins) */
228 887006 : maximum( cldfb_bin + 1, 2, &max_WB );
229 :
230 887006 : mean_NB += CLDFB_ENER_OFFSET;
231 887006 : max_NB += CLDFB_ENER_OFFSET;
232 887006 : mean_WB += CLDFB_ENER_OFFSET;
233 887006 : max_WB += CLDFB_ENER_OFFSET;
234 :
235 887006 : if ( st->input_Fs == 16000 )
236 : {
237 : /* for 16kHz sampled inputs, do not check SWB & FB */
238 66970 : mean_SWB = 0.0f;
239 66970 : max_SWB = 0.0f;
240 66970 : mean_FB = 0.0f;
241 66970 : max_FB = 0.0f;
242 : }
243 820036 : else if ( st->input_Fs == 32000 )
244 : {
245 : /* for 32kHz sampled inputs, do not check FB */
246 105258 : mean_FB = 0.0f;
247 105258 : max_FB = 0.0f;
248 105258 : mean_SWB = mean( cldfb_bin + 3, 4 ); /* SWB: 9.2 - 15.6 kHz, 16 cldfb-bands (4 bins) */
249 105258 : maximum( cldfb_bin + 3, 4, &max_SWB );
250 105258 : mean_SWB += CLDFB_ENER_OFFSET;
251 105258 : max_SWB += CLDFB_ENER_OFFSET;
252 : }
253 : else
254 : {
255 714778 : mean_SWB = mean( cldfb_bin + 3, 4 ); /* SWB: 9.2 - 15.6 kHz, 16 cldfb-bands (4 bins) */
256 714778 : maximum( cldfb_bin + 3, 4, &max_SWB );
257 714778 : mean_FB = mean( cldfb_bin + 7, 2 ); /* FB: 16.8 - 20.0 kHz, 8 cldfb-bands (2 bins) */
258 714778 : maximum( cldfb_bin + 7, 2, &max_FB );
259 :
260 714778 : mean_SWB += CLDFB_ENER_OFFSET;
261 714778 : max_SWB += CLDFB_ENER_OFFSET;
262 714778 : mean_FB += CLDFB_ENER_OFFSET;
263 714778 : max_FB += CLDFB_ENER_OFFSET;
264 : }
265 : }
266 : else
267 : {
268 2095368 : mean_NB = mean( spect_bin + bwd_start_bin[0], bwd_end_bin[0] - bwd_start_bin[0] + 1 ); /* NB: 1.5-3.0kHz (1 bin) */
269 2095368 : maximum( spect_bin + bwd_start_bin[0], bwd_end_bin[0] - bwd_start_bin[0] + 1, &max_NB );
270 2095368 : mean_WB = mean( spect_bin + bwd_start_bin[1], bwd_end_bin[1] - bwd_start_bin[1] + 1 ); /* WB: 4.5-7.5kHz (2 bins) */
271 2095368 : maximum( spect_bin + bwd_start_bin[1], bwd_end_bin[1] - bwd_start_bin[1] + 1, &max_WB );
272 :
273 2095368 : if ( st->input_Fs == 16000 )
274 : {
275 : /* for 16kHz sampled inputs, do not check SWB & FB */
276 135320 : mean_SWB = 0.0f;
277 135320 : max_SWB = 0.0f;
278 135320 : mean_FB = 0.0f;
279 135320 : max_FB = 0.0f;
280 : }
281 1960048 : else if ( st->input_Fs == 32000 )
282 : {
283 255577 : mean_SWB = mean( spect_bin + bwd_start_bin[2], bwd_end_bin[2] - bwd_start_bin[2] + 1 ); /* SWB: 9.0-15.0kHz (4 bins) */
284 255577 : maximum( spect_bin + bwd_start_bin[2], bwd_end_bin[2] - bwd_start_bin[2] + 1, &max_SWB );
285 :
286 : /* for 32kHz sampled inputs, do not check FB */
287 255577 : mean_FB = 0.0f;
288 255577 : max_FB = 0.0f;
289 : }
290 : else
291 : {
292 1704471 : mean_SWB = mean( spect_bin + bwd_start_bin[2], bwd_end_bin[2] - bwd_start_bin[2] + 1 ); /* SWB: 9.0-15.0kHz (4 bins) */
293 1704471 : maximum( spect_bin + bwd_start_bin[2], bwd_end_bin[2] - bwd_start_bin[2] + 1, &max_SWB );
294 1704471 : mean_FB = mean( spect_bin + bwd_start_bin[3], bwd_end_bin[3] - bwd_start_bin[3] + 1 ); /* FB: 16.5-19.5kHz (2 bins) */
295 1704471 : maximum( spect_bin + bwd_start_bin[3], bwd_end_bin[3] - bwd_start_bin[3] + 1, &max_FB );
296 : }
297 : }
298 :
299 : /*---------------------------------------------------------------------*
300 : * update LT counters and energies
301 : *---------------------------------------------------------------------*/
302 :
303 2982374 : if ( st->localVAD || st->lp_noise > 30 )
304 : {
305 2724884 : st->lt_mean_NB = ALPHA_BWD * st->lt_mean_NB + ( 1 - ALPHA_BWD ) * mean_NB;
306 2724884 : st->lt_mean_WB = ALPHA_BWD * st->lt_mean_WB + ( 1 - ALPHA_BWD ) * mean_WB;
307 2724884 : st->lt_mean_SWB = ALPHA_BWD * st->lt_mean_SWB + ( 1 - ALPHA_BWD ) * mean_SWB;
308 :
309 2724884 : if ( enerBuffer != NULL )
310 : {
311 796346 : if ( 0.9f * max_WB > BWD_LT_THRESH * st->lt_mean_NB )
312 : {
313 572749 : if ( 2.5f * max_WB > max_NB )
314 : {
315 572384 : st->count_WB++;
316 : }
317 : }
318 : else
319 : {
320 223597 : if ( 3.5f * mean_WB < mean_NB )
321 : {
322 12286 : st->count_WB--;
323 : }
324 : }
325 :
326 796346 : if ( 0.83f * max_SWB > BWD_LT_THRESH * st->lt_mean_WB && max_WB > BWD_LT_THRESH * st->lt_mean_NB )
327 : {
328 564813 : if ( 2 * max_SWB > max_WB )
329 : {
330 563201 : st->count_SWB++;
331 : }
332 : }
333 : else
334 : {
335 231533 : if ( 3 * mean_SWB < mean_WB )
336 : {
337 79749 : st->count_SWB--;
338 : }
339 : }
340 :
341 796346 : if ( max_FB > BWD_LT_THRESH * st->lt_mean_SWB && 0.83f * max_SWB > BWD_LT_THRESH * st->lt_mean_WB && max_WB > BWD_LT_THRESH * st->lt_mean_NB )
342 : {
343 384533 : if ( 3 * max_FB > max_SWB )
344 : {
345 383951 : st->count_FB++;
346 : }
347 : }
348 : else
349 : {
350 411813 : if ( 4.1f * mean_FB < mean_SWB )
351 : {
352 202725 : st->count_FB--;
353 : }
354 : }
355 : }
356 : else
357 : {
358 1928538 : if ( max_WB > BWD_LT_THRESH * st->lt_mean_NB )
359 : {
360 1638653 : if ( 2 * max_WB > max_NB )
361 : {
362 1635318 : st->count_WB++;
363 : }
364 : }
365 : else
366 : {
367 289885 : if ( 2.6f * mean_WB < mean_NB )
368 : {
369 75766 : st->count_WB--;
370 : }
371 : }
372 :
373 1928538 : if ( max_SWB > BWD_LT_THRESH * st->lt_mean_WB && max_WB > BWD_LT_THRESH * st->lt_mean_NB )
374 : {
375 1494578 : if ( 2 * max_SWB > max_WB )
376 : {
377 1481649 : st->count_SWB++;
378 : }
379 : }
380 : else
381 : {
382 433960 : if ( 3 * mean_SWB < mean_WB )
383 : {
384 176143 : st->count_SWB--;
385 : }
386 : }
387 :
388 1928538 : if ( max_FB > BWD_LT_THRESH * st->lt_mean_SWB && max_SWB > BWD_LT_THRESH * st->lt_mean_WB && max_WB > BWD_LT_THRESH * st->lt_mean_NB )
389 : {
390 1219490 : if ( 2 * max_FB > max_SWB )
391 : {
392 1209232 : st->count_FB++;
393 : }
394 : }
395 : else
396 : {
397 709048 : if ( 3 * mean_FB < mean_SWB )
398 : {
399 293004 : st->count_FB--;
400 : }
401 : }
402 : }
403 :
404 2724884 : st->count_WB = min( st->count_WB, BWD_COUNT_MAX );
405 2724884 : st->count_SWB = min( st->count_SWB, BWD_COUNT_MAX );
406 2724884 : st->count_FB = min( st->count_FB, BWD_COUNT_MAX );
407 2724884 : st->count_WB = max( st->count_WB, 0 );
408 2724884 : st->count_SWB = max( st->count_SWB, 0 );
409 2724884 : st->count_FB = max( st->count_FB, 0 );
410 :
411 : /*---------------------------------------------------------------------*
412 : * check against thresholds
413 : * detect a band-width change
414 : *---------------------------------------------------------------------*/
415 :
416 : /* switching to a higher BW */
417 2724884 : if ( st->last_input_bwidth == NB )
418 : {
419 1923 : if ( st->count_WB > bwd_count_wider_bw )
420 : {
421 47 : st->input_bwidth = WB;
422 47 : st->count_WB = BWD_COUNT_MAX;
423 :
424 47 : if ( st->count_SWB > bwd_count_wider_bw )
425 : {
426 27 : st->input_bwidth = SWB;
427 27 : st->count_SWB = BWD_COUNT_MAX;
428 :
429 27 : if ( st->count_FB > bwd_count_wider_bw )
430 : {
431 0 : st->input_bwidth = FB;
432 0 : st->count_FB = BWD_COUNT_MAX;
433 : }
434 : }
435 : }
436 : }
437 :
438 2724884 : if ( st->last_input_bwidth == WB && st->input_Fs > 16000 )
439 : {
440 30473 : if ( st->count_SWB > bwd_count_wider_bw )
441 : {
442 30461 : st->input_bwidth = SWB;
443 30461 : st->count_SWB = BWD_COUNT_MAX;
444 :
445 30461 : if ( st->count_FB > bwd_count_wider_bw )
446 : {
447 30449 : st->input_bwidth = FB;
448 30449 : st->count_FB = BWD_COUNT_MAX;
449 : }
450 : }
451 : }
452 :
453 2724884 : if ( st->last_input_bwidth == SWB && st->input_Fs > 32000 )
454 : {
455 223164 : if ( st->count_FB > bwd_count_wider_bw )
456 : {
457 192939 : st->input_bwidth = FB;
458 192939 : st->count_FB = BWD_COUNT_MAX;
459 : }
460 : }
461 :
462 : /* switching to a lower BW */
463 2724884 : if ( st->last_input_bwidth == FB )
464 : {
465 1935533 : if ( st->count_FB < 10 )
466 : {
467 52 : st->input_bwidth = SWB;
468 52 : st->count_FB = 0;
469 : }
470 1935533 : if ( st->count_SWB < 10 )
471 : {
472 0 : st->input_bwidth = WB;
473 0 : st->count_SWB = 0;
474 0 : st->count_FB = 0;
475 : }
476 1935533 : if ( st->count_WB < 10 )
477 : {
478 42 : st->input_bwidth = NB;
479 42 : st->count_WB = 0;
480 42 : st->count_SWB = 0;
481 42 : st->count_FB = 0;
482 : }
483 : }
484 :
485 2724884 : if ( st->last_input_bwidth == SWB )
486 : {
487 560943 : if ( st->count_SWB < 10 )
488 : {
489 0 : st->input_bwidth = WB;
490 0 : st->count_SWB = 0;
491 0 : st->count_FB = 0;
492 : }
493 560943 : if ( st->count_WB < 10 )
494 : {
495 24 : st->input_bwidth = NB;
496 24 : st->count_WB = 0;
497 24 : st->count_SWB = 0;
498 24 : st->count_FB = 0;
499 : }
500 : }
501 :
502 2724884 : if ( st->last_input_bwidth == WB )
503 : {
504 226485 : if ( st->count_WB < 10 )
505 : {
506 12 : st->input_bwidth = NB;
507 12 : st->count_WB = 0;
508 12 : st->count_SWB = 0;
509 12 : st->count_FB = 0;
510 : }
511 : }
512 : }
513 : }
514 :
515 : /* verify that maximum encoded bandwidth (specified on the command line) is not exceeded */
516 2983174 : if ( st->input_bwidth > st->max_bwidth )
517 : {
518 223484 : st->input_bwidth = st->max_bwidth;
519 : }
520 :
521 2983174 : if ( st->element_mode == EVS_MONO )
522 : {
523 18500 : set_bw( -1, -1, st, st->codec_mode );
524 : }
525 :
526 2983174 : return;
527 : }
528 :
529 : /*-------------------------------------------------------------------*
530 : * set_bw()
531 : *
532 : * Set and limit the encoded bandwidth
533 : *-------------------------------------------------------------------*/
534 :
535 985472 : void set_bw(
536 : const int16_t element_mode, /* i : element mode */
537 : const int32_t element_brate, /* i : element bitrate */
538 : Encoder_State *st, /* i/o: Encoder State */
539 : const int16_t codec_mode /* i : codec mode */
540 : )
541 : {
542 : /* initialization */
543 985472 : st->bwidth = st->input_bwidth;
544 :
545 985472 : if ( codec_mode == MODE1 )
546 : {
547 : int32_t total_brate;
548 :
549 976142 : st->bwidth = st->input_bwidth;
550 976142 : total_brate = st->total_brate;
551 :
552 976142 : if ( element_mode > IVAS_SCE )
553 : {
554 143807 : if ( element_brate < MIN_BRATE_SWB_STEREO )
555 : {
556 0 : st->bwidth = WB;
557 : }
558 : else
559 : {
560 143807 : if ( st->idchan == 0 || element_mode == IVAS_CPE_MDCT )
561 : {
562 139216 : if ( element_brate >= MIN_BRATE_FB_STEREO )
563 : {
564 38701 : st->bwidth = min( st->bwidth, FB );
565 : }
566 : else
567 : {
568 100515 : st->bwidth = min( st->bwidth, SWB );
569 : }
570 139216 : st->bwidth = max( st->bwidth, WB );
571 : }
572 : else
573 : {
574 4591 : st->bwidth = WB;
575 : }
576 : }
577 : }
578 832335 : else if ( element_mode == IVAS_SCE )
579 : {
580 823165 : if ( element_brate < MIN_BRATE_SWB_SCE || st->bwidth < WB )
581 : {
582 10437 : st->bwidth = WB;
583 : }
584 812728 : else if ( st->bwidth > SWB && ( ( element_brate < MIN_BRATE_FB_STEREO && !st->is_ism_format ) ||
585 21736 : ( element_brate < MIN_BRATE_FB_ISM && st->is_ism_format ) ) )
586 : {
587 23011 : st->bwidth = SWB;
588 : }
589 789717 : else if ( element_brate > BWD_MAX_BRATE_WIDER_BW_ISM )
590 : {
591 89124 : st->bwidth = st->max_bwidth;
592 : }
593 : }
594 : /* element_mode == EVS_MONO */
595 9170 : else if ( total_brate <= ACELP_9k60 && st->bwidth > WB )
596 : {
597 80 : st->bwidth = WB;
598 : }
599 9090 : else if ( total_brate >= ACELP_13k20 && total_brate <= ACELP_16k40 && st->bwidth > SWB )
600 : {
601 0 : st->bwidth = SWB;
602 : }
603 9090 : else if ( total_brate >= ACELP_32k && st->bwidth < WB )
604 : {
605 0 : st->bwidth = WB;
606 : }
607 : }
608 9330 : else if ( codec_mode == MODE2 )
609 : {
610 : int16_t n, bits_frame_nominal, tmpBandwidthMin;
611 :
612 9330 : bits_frame_nominal = (int16_t) ( st->total_brate / FRAMES_PER_SEC );
613 78420 : for ( n = 0; n < FRAME_SIZE_NB; n++ )
614 : {
615 78420 : if ( FrameSizeConfig[n].frame_bits == bits_frame_nominal )
616 : {
617 9330 : break;
618 : }
619 : }
620 9330 : if ( n == FRAME_SIZE_NB )
621 : {
622 0 : assert( !"Bitrate not supported: not part of EVS" );
623 : }
624 :
625 9330 : tmpBandwidthMin = FrameSizeConfig[n].bandwidth_min;
626 :
627 9330 : if ( st->rf_mode )
628 : {
629 1600 : tmpBandwidthMin = WB;
630 : }
631 :
632 9330 : st->bwidth = max( min( st->input_bwidth, FrameSizeConfig[n].bandwidth_max ), tmpBandwidthMin );
633 : }
634 :
635 985472 : return;
636 : }
637 :
638 : /*-------------------------------------------------------------------*
639 : * set_bw_stereo()
640 : *
641 : * Set encoded bandwidth for stereo (CPE) channels
642 : *-------------------------------------------------------------------*/
643 :
644 220516 : void set_bw_stereo(
645 : CPE_ENC_HANDLE hCPE /* i/o: CPE encoder structures */
646 : )
647 : {
648 220516 : Encoder_State **sts = hCPE->hCoreCoder;
649 :
650 220516 : if ( hCPE->element_brate > BWD_MAX_BRATE_WIDER_BW_MDCT )
651 : {
652 70105 : sts[0]->bwidth = sts[0]->max_bwidth;
653 70105 : sts[1]->bwidth = sts[1]->max_bwidth;
654 : }
655 150411 : else if ( hCPE->element_mode == IVAS_CPE_MDCT )
656 : {
657 : /* ensure that both CPE channels have the same audio band-width */
658 150411 : if ( sts[0]->input_bwidth == sts[1]->input_bwidth )
659 : {
660 148626 : sts[0]->bwidth = sts[0]->input_bwidth;
661 148626 : sts[1]->bwidth = sts[0]->input_bwidth;
662 : }
663 : else
664 : {
665 1785 : sts[0]->bwidth = max( sts[0]->input_bwidth, sts[1]->input_bwidth );
666 1785 : sts[1]->bwidth = max( sts[0]->input_bwidth, sts[1]->input_bwidth );
667 : }
668 : }
669 :
670 220516 : sts[0]->bwidth = max( sts[0]->bwidth, WB );
671 220516 : sts[1]->bwidth = max( sts[1]->bwidth, WB );
672 :
673 220516 : return;
674 : }
675 :
676 : /*-------------------------------------------------------------------*
677 : * set_bw_mct()
678 : *
679 : * Set encoded bandwidth for MCT
680 : *-------------------------------------------------------------------*/
681 :
682 : /*! r: flag indicating whether the coded BW has changed */
683 306279 : int16_t set_bw_mct(
684 : CPE_ENC_HANDLE hCPE[MCT_MAX_BLOCKS], /* i/o: CPE encoder structures */
685 : const int16_t nCPE /* i : number of CPEs */
686 : )
687 : {
688 : Encoder_State *st;
689 : int16_t ch, cpe_id;
690 : int16_t mct_bwidth, last_mct_bwidth, bw_changed;
691 :
692 306279 : mct_bwidth = WB; /* minimum coded audio band-width */
693 306279 : last_mct_bwidth = hCPE[0]->hCoreCoder[0]->last_bwidth; /* supposes that LFE is not in the first channel */
694 :
695 1194647 : for ( cpe_id = 0; cpe_id < nCPE; cpe_id++ )
696 : {
697 2665104 : for ( ch = 0; ch < CPE_CHANNELS; ch++ )
698 : {
699 1776736 : st = hCPE[cpe_id]->hCoreCoder[ch];
700 1776736 : if ( st->mct_chan_mode == MCT_CHAN_MODE_IGNORE )
701 : {
702 186499 : continue;
703 : }
704 :
705 1590237 : mct_bwidth = max( mct_bwidth, st->input_bwidth );
706 : }
707 : }
708 :
709 1194647 : for ( cpe_id = 0; cpe_id < nCPE; cpe_id++ )
710 : {
711 888368 : if ( hCPE[cpe_id]->element_brate > BWD_MAX_BRATE_WIDER_BW_MDCT )
712 : {
713 643348 : mct_bwidth = max( mct_bwidth, hCPE[cpe_id]->hCoreCoder[0]->max_bwidth );
714 : }
715 : }
716 :
717 306279 : bw_changed = 0;
718 306279 : if ( mct_bwidth != last_mct_bwidth )
719 : {
720 179 : bw_changed = 1;
721 : }
722 :
723 : /*
724 : * always set bw for all CPEs even if it is the same value as before,
725 : * in case of bw + br switching when changing to MCT, this overwrites
726 : * potentially incorrect initial values
727 : */
728 1194647 : for ( cpe_id = 0; cpe_id < nCPE; cpe_id++ )
729 : {
730 2665104 : for ( ch = 0; ch < CPE_CHANNELS; ch++ )
731 : {
732 1776736 : st = hCPE[cpe_id]->hCoreCoder[ch];
733 1776736 : st->bwidth = mct_bwidth;
734 : }
735 : }
736 :
737 306279 : return bw_changed;
738 : }
|
