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 <stdint.h>
34 : #include "options.h"
35 : #include "math.h"
36 : #include "prot.h"
37 : #include "ivas_prot.h"
38 : #include "ivas_cnst.h"
39 : #include "ivas_rom_com.h"
40 : #ifdef DEBUGGING
41 : #include "debug.h"
42 : #endif
43 : #include "wmc_auto.h"
44 :
45 :
46 : /*-----------------------------------------------------------------------------------------*
47 : * Function ivas_lfe_arith_coding()
48 : *
49 : * LFE Arithmetic coding block. Writes encoded data to bitstream.
50 : *-----------------------------------------------------------------------------------------*/
51 :
52 244073 : static void ivas_lfe_arith_coding(
53 : LFE_ENC_HANDLE hLFE,
54 : BSTR_ENC_HANDLE hBstr,
55 : const int16_t quant_strategy,
56 : int16_t *values )
57 : {
58 : Tastat as;
59 : int16_t index, i;
60 : int16_t max_value, offset;
61 : uint16_t num_ele_per_grp;
62 : int16_t num_groups;
63 244073 : index = 0;
64 244073 : num_ele_per_grp = IVAS_LFE_NUM_COEFFS_IN_SUBGRP << 1;
65 244073 : num_groups = ivas_lfe_num_dct_pass_bins_tbl[quant_strategy] >> 1;
66 :
67 1220365 : for ( i = 0; i < num_groups; i++ )
68 : {
69 976292 : max_value = ivas_lfe_num_ele_in_coder_models[quant_strategy][i];
70 976292 : ari_start_encoding_14bits( &as );
71 976292 : offset = 4 * i;
72 :
73 4881460 : for ( index = 0; index < num_ele_per_grp; index++ )
74 : {
75 3905168 : if ( values[index + offset] > max_value )
76 : {
77 1743 : values[index + offset] = max_value;
78 : }
79 3905168 : ivas_ari_encode_14bits_ext( hBstr, &as, values[index + offset], hLFE->cum_freq_models[quant_strategy][i] );
80 : }
81 :
82 976292 : ivas_ari_done_encoding_14bits( hBstr, &as );
83 : }
84 :
85 244073 : return;
86 : }
87 :
88 :
89 : /*-----------------------------------------------------------------------------------------*
90 : * Function ivas_lfe_enc_quant()
91 : *
92 : * LFE quatization block, calls arithmetic coding block inside
93 : *-----------------------------------------------------------------------------------------*/
94 :
95 419802 : static void ivas_lfe_enc_quant(
96 : LFE_ENC_HANDLE hLFE,
97 : float *pLfe_dct,
98 : BSTR_ENC_HANDLE hBstr )
99 : {
100 : int16_t bits_written;
101 : int16_t nb_ind_tot;
102 : uint16_t quant_strategy, write_bit;
103 : int16_t num_quant_strategies;
104 : int16_t shift_bits;
105 : int16_t values[IVAS_LFE_MAX_NUM_DCT_COEFFS << 1];
106 : float temp_lfe_dct[IVAS_LFE_MAX_NUM_DCT_COEFFS];
107 : int16_t target_bits;
108 : int16_t base2_num_bits_tot;
109 : int16_t coding_strategy;
110 : int16_t bits_written_arith_enc;
111 : int16_t next_ind_pos_arith_enc;
112 419802 : int16_t num_ele_per_grp = IVAS_LFE_NUM_COEFFS_IN_SUBGRP << 1;
113 :
114 419802 : target_bits = (int16_t) ( IVAS_LFE_BITRATE_5000 / FRAMES_PER_SEC );
115 :
116 419802 : write_bit = 0;
117 419802 : num_quant_strategies = IVAS_MAX_NUM_QUANT_STRATS;
118 419802 : shift_bits = IVAS_LFE_SHIFT_BITS;
119 419802 : bits_written = hBstr->nb_bits_tot;
120 419802 : nb_ind_tot = hBstr->nb_ind_tot;
121 :
122 :
123 419802 : for ( quant_strategy = 0; quant_strategy < num_quant_strategies; quant_strategy++ )
124 : {
125 : float lfe_abs_sum;
126 : int16_t num_dct_pass_bins;
127 : int16_t max_of_vals, num_groups;
128 : int16_t shift;
129 : uint16_t min_shift, i, j;
130 : uint16_t max_shift;
131 : uint16_t max_value, num_lfe_ele;
132 : uint16_t all_zeros_dct;
133 :
134 419802 : lfe_abs_sum = 0;
135 419802 : coding_strategy = 0;
136 419802 : num_dct_pass_bins = ivas_lfe_num_dct_pass_bins_tbl[quant_strategy];
137 419802 : max_of_vals = 0;
138 419802 : num_groups = num_dct_pass_bins >> 1;
139 419802 : shift = 0;
140 419802 : min_shift = ivas_lfe_min_shift_tbl[quant_strategy];
141 419802 : max_shift = min_shift * IVAS_LFE_SHIFTS_PER_DOUBLE + ( 1 << shift_bits ) - 1;
142 419802 : num_lfe_ele = num_dct_pass_bins * IVAS_LFE_NUM_COEFFS_IN_SUBGRP;
143 419802 : all_zeros_dct = 0;
144 419802 : max_value = ivas_lfe_num_ele_in_coder_models[quant_strategy][0];
145 :
146 419802 : mvr2r( &pLfe_dct[IVAS_LFE_MAX_NUM_DCT_PASS_BINS], &pLfe_dct[num_dct_pass_bins], num_dct_pass_bins );
147 :
148 2099010 : for ( i = 0; i < num_groups; i++ )
149 : {
150 1679208 : temp_lfe_dct[4 * i] = pLfe_dct[2 * i];
151 1679208 : lfe_abs_sum += fabsf( temp_lfe_dct[4 * i] );
152 1679208 : temp_lfe_dct[4 * i + 1] = pLfe_dct[2 * i + 1];
153 1679208 : lfe_abs_sum += fabsf( temp_lfe_dct[4 * i + 1] );
154 :
155 1679208 : temp_lfe_dct[4 * i + 2] = pLfe_dct[2 * i + num_dct_pass_bins];
156 1679208 : lfe_abs_sum += fabsf( temp_lfe_dct[4 * i + 2] );
157 1679208 : temp_lfe_dct[4 * i + 3] = pLfe_dct[2 * i + num_dct_pass_bins + 1];
158 1679208 : lfe_abs_sum += fabsf( temp_lfe_dct[4 * i + 3] );
159 : }
160 :
161 419802 : if ( lfe_abs_sum <= IVAS_LFE_ABS_SUM_FLT_THR )
162 : {
163 296 : shift = max_shift;
164 : }
165 : else
166 : {
167 419506 : shift = (int16_t) floorf( IVAS_LFE_SHIFTS_PER_DOUBLE * log2_f( max_value / lfe_abs_sum ) );
168 : }
169 :
170 419802 : shift = max( min_shift * IVAS_LFE_SHIFTS_PER_DOUBLE, min( max_shift, shift ) );
171 :
172 : while ( 1 )
173 : {
174 419802 : if ( shift == max_shift )
175 : {
176 : /* write all LFE bits as 0 */
177 175729 : all_zeros_dct = 1;
178 175729 : break;
179 : }
180 : else
181 : {
182 244073 : max_of_vals = 0;
183 4149241 : for ( i = 0; i < num_lfe_ele; i++ )
184 : {
185 : float temp;
186 3905168 : temp = temp_lfe_dct[i] * powf( 2, ( (float) shift / IVAS_LFE_SHIFTS_PER_DOUBLE ) );
187 :
188 3905168 : if ( temp < 0 )
189 : {
190 1958885 : values[i] = (int16_t) ( temp - 0.5f );
191 : }
192 : else
193 : {
194 1946283 : values[i] = (int16_t) ( temp + 0.5f );
195 : }
196 :
197 3905168 : if ( max_of_vals < abs( values[i] ) )
198 : {
199 514084 : max_of_vals = (int16_t) abs( values[i] );
200 : }
201 : }
202 : }
203 244073 : if ( max_of_vals <= max_value )
204 : {
205 244073 : break;
206 : }
207 0 : shift = shift - 1;
208 : }
209 :
210 419802 : if ( shift < min_shift * IVAS_LFE_SHIFTS_PER_DOUBLE )
211 : {
212 0 : continue;
213 : }
214 :
215 419802 : if ( all_zeros_dct != 1 )
216 : {
217 244073 : push_next_indice( hBstr, all_zeros_dct, 1 );
218 244073 : push_next_indice( hBstr, quant_strategy, 1 );
219 244073 : push_next_indice( hBstr, shift - min_shift * IVAS_LFE_SHIFTS_PER_DOUBLE, shift_bits );
220 : }
221 : else
222 : {
223 175729 : push_next_indice( hBstr, all_zeros_dct, 1 );
224 175729 : hLFE->lfe_bits = hBstr->nb_bits_tot - bits_written;
225 175729 : return;
226 : }
227 :
228 4149241 : for ( i = 0; i < num_lfe_ele; i++ )
229 : {
230 3905168 : if ( values[i] < 0 )
231 : {
232 1161422 : write_bit = 1;
233 1161422 : values[i] = values[i] + 1;
234 : }
235 : else
236 : {
237 2743746 : write_bit = 0;
238 : }
239 :
240 3905168 : values[i] = (int16_t) abs( values[i] );
241 :
242 3905168 : push_next_indice( hBstr, write_bit, 1 );
243 : }
244 :
245 244073 : bits_written_arith_enc = hBstr->nb_bits_tot;
246 244073 : next_ind_pos_arith_enc = hBstr->nb_ind_tot;
247 244073 : push_next_indice( hBstr, coding_strategy, 1 );
248 244073 : base2_num_bits_tot = hBstr->nb_bits_tot - bits_written;
249 :
250 244073 : ivas_lfe_arith_coding( hLFE, hBstr, quant_strategy, values );
251 :
252 1220365 : for ( i = 0; i < num_groups; i++ )
253 : {
254 976292 : int16_t base2_num_bits = hLFE->lfe_enc_indices_coeffs_tbl[quant_strategy][i];
255 976292 : base2_num_bits_tot += ( num_ele_per_grp * base2_num_bits );
256 : }
257 :
258 244073 : if ( ( base2_num_bits_tot ) < ( hBstr->nb_bits_tot - bits_written ) )
259 : {
260 433 : if ( quant_strategy == ( num_quant_strategies - 1 ) || ( ( target_bits + IVAS_LFE_ID_BITS ) >= base2_num_bits_tot ) )
261 : {
262 : /* reset bits buffer and code the indices with base 2 coding */
263 29899 : for ( j = hBstr->nb_ind_tot - 1; j >= next_ind_pos_arith_enc; j-- )
264 : {
265 29466 : hBstr->ind_list[j].nb_bits = -1;
266 : }
267 433 : hBstr->nb_ind_tot = next_ind_pos_arith_enc;
268 433 : hBstr->nb_bits_tot = bits_written_arith_enc;
269 433 : coding_strategy = 1;
270 433 : push_next_indice( hBstr, coding_strategy, 1 );
271 :
272 2165 : for ( i = 0; i < num_groups; i++ )
273 : {
274 1732 : int16_t base2_write_bits = hLFE->lfe_enc_indices_coeffs_tbl[quant_strategy][i];
275 1732 : int16_t offset = 4 * i;
276 1732 : max_value = ivas_lfe_num_ele_in_coder_models[quant_strategy][i];
277 :
278 8660 : for ( j = 0; j < num_ele_per_grp; j++ )
279 : {
280 6928 : if ( values[j + offset] > max_value )
281 : {
282 0 : values[j + offset] = max_value;
283 : }
284 6928 : push_next_indice( hBstr, values[j + offset], base2_write_bits );
285 : }
286 : }
287 433 : break;
288 : }
289 : }
290 : else
291 : {
292 243640 : if ( ( target_bits + IVAS_LFE_ID_BITS ) >= ( hBstr->nb_bits_tot - bits_written ) )
293 : {
294 243640 : break;
295 : }
296 : else
297 : {
298 0 : if ( quant_strategy < ( num_quant_strategies - 1 ) )
299 : {
300 0 : for ( j = hBstr->nb_ind_tot - 1; j >= nb_ind_tot; j-- )
301 : {
302 0 : hBstr->ind_list[j].nb_bits = -1;
303 : }
304 :
305 0 : hBstr->nb_bits_tot = bits_written;
306 0 : hBstr->nb_ind_tot = nb_ind_tot;
307 : }
308 : }
309 : }
310 : }
311 :
312 : /* bits spent for LFE coding */
313 244073 : hLFE->lfe_bits = hBstr->nb_bits_tot - bits_written;
314 :
315 244073 : return;
316 : }
317 :
318 :
319 : /*-----------------------------------------------------------------------------------------*
320 : * Function ivas_lfe_enc()
321 : *
322 : * LFE channel encoder
323 : *-----------------------------------------------------------------------------------------*/
324 :
325 419802 : void ivas_lfe_enc(
326 : LFE_ENC_HANDLE hLFE, /* i/o: LFE encoder handle */
327 : float data_lfe_ch[], /* i : input LFE signal */
328 : const int16_t input_frame, /* i : input frame length per channel */
329 : BSTR_ENC_HANDLE hBstr /* i/o: bitstream handle */
330 : )
331 : {
332 : float t_audio[L_FRAME48k];
333 : float wtda_audio[L_FRAME48k];
334 : float lfe_dct[IVAS_LFE_MAX_NUM_DCT_COEFFS];
335 : int16_t num_dct_pass_bins;
336 : int16_t fade_len, full_len, dct_len, zero_pad_len;
337 : const float *pWindow_coeffs;
338 :
339 : /* Initializations */
340 419802 : num_dct_pass_bins = IVAS_LFE_MAX_NUM_DCT_PASS_BINS;
341 419802 : fade_len = hLFE->pWindow_state->fade_len;
342 419802 : full_len = hLFE->pWindow_state->full_len;
343 419802 : dct_len = hLFE->pWindow_state->dct_len;
344 419802 : zero_pad_len = hLFE->pWindow_state->zero_pad_len;
345 419802 : pWindow_coeffs = hLFE->pWindow_state->pWindow_coeffs;
346 :
347 : /* Windowing */
348 419802 : ivas_dct_windowing( fade_len, full_len, dct_len, zero_pad_len, pWindow_coeffs, input_frame, wtda_audio, hLFE->old_wtda_audio, data_lfe_ch );
349 :
350 419802 : ivas_mdct( wtda_audio, t_audio, dct_len );
351 :
352 419802 : mvr2r( t_audio, lfe_dct, num_dct_pass_bins );
353 :
354 : /* windowing */
355 419802 : ivas_dct_windowing( fade_len, full_len, dct_len, zero_pad_len, pWindow_coeffs, input_frame, wtda_audio, hLFE->old_wtda_audio, data_lfe_ch + dct_len );
356 :
357 : /* mdct */
358 419802 : ivas_mdct( wtda_audio, t_audio, dct_len );
359 :
360 419802 : mvr2r( t_audio, lfe_dct + num_dct_pass_bins, num_dct_pass_bins );
361 :
362 419802 : ivas_lfe_enc_quant( hLFE, lfe_dct, hBstr );
363 :
364 419802 : return;
365 : }
366 :
367 :
368 : /*-------------------------------------------------------------------------
369 : * ivas_create_lfe_enc()
370 : *
371 : * Create, allocate and initialize IVAS encoder LFE handle
372 : *-------------------------------------------------------------------------*/
373 :
374 5847 : ivas_error ivas_create_lfe_enc(
375 : LFE_ENC_HANDLE *hLFE_out, /* o : IVAS LFE encoder structure */
376 : const int32_t input_Fs /* i : input sampling rate */
377 : )
378 : {
379 : int16_t input_frame;
380 : LFE_ENC_HANDLE hLFE;
381 : int16_t i, j;
382 :
383 5847 : input_frame = (int16_t) ( input_Fs / FRAMES_PER_SEC );
384 :
385 : /*-----------------------------------------------------------------*
386 : * Allocate LFE handle
387 : *-----------------------------------------------------------------*/
388 :
389 5847 : if ( ( hLFE = (LFE_ENC_HANDLE) malloc( sizeof( LFE_ENC_DATA ) ) ) == NULL )
390 : {
391 0 : return ( IVAS_ERROR( IVAS_ERR_FAILED_ALLOC, "Can not allocate memory for LFE\n" ) );
392 : }
393 :
394 : /* initializations */
395 5847 : hLFE->lfe_bits = 0;
396 :
397 5847 : hLFE->pWindow_state = NULL;
398 5847 : hLFE->hBstr = NULL;
399 :
400 : /*-----------------------------------------------------------------*
401 : * Input memory buffer: allocate and initialize
402 : *-----------------------------------------------------------------*/
403 :
404 5847 : if ( ( hLFE->old_wtda_audio = (float *) malloc( sizeof( float ) * NS2SA( input_Fs, IVAS_LFE_FADE_NS ) ) ) == NULL )
405 : {
406 0 : return ( IVAS_ERROR( IVAS_ERR_FAILED_ALLOC, "Can not allocate memory for LFE memory\n" ) );
407 : }
408 :
409 5847 : set_zero( hLFE->old_wtda_audio, NS2SA( input_Fs, IVAS_LFE_FADE_NS ) );
410 :
411 : /*-----------------------------------------------------------------*
412 : * LFE Window: allocate and initialize
413 : *-----------------------------------------------------------------*/
414 :
415 5847 : if ( ( hLFE->pWindow_state = (LFE_WINDOW_HANDLE) malloc( sizeof( LFE_WINDOW_DATA ) ) ) == NULL )
416 : {
417 0 : return ( IVAS_ERROR( IVAS_ERR_FAILED_ALLOC, "Can not allocate memory for LFE window structure\n" ) );
418 : }
419 :
420 5847 : ivas_lfe_window_init( hLFE->pWindow_state, input_Fs, input_frame );
421 :
422 : /* Initialization for entropy coding */
423 5847 : hLFE->cum_freq_models[0][0] = ivas_str_lfe_freq_models.entropy_coder_model_fine_sg1;
424 5847 : hLFE->cum_freq_models[0][1] = ivas_str_lfe_freq_models.entropy_coder_model_fine_sg2;
425 5847 : hLFE->cum_freq_models[0][2] = ivas_str_lfe_freq_models.entropy_coder_model_fine_sg3;
426 5847 : hLFE->cum_freq_models[0][3] = ivas_str_lfe_freq_models.entropy_coder_model_fine_sg4;
427 5847 : hLFE->cum_freq_models[1][0] = ivas_str_lfe_freq_models.entropy_coder_model_coarse_sg1;
428 5847 : hLFE->cum_freq_models[1][1] = ivas_str_lfe_freq_models.entropy_coder_model_coarse_sg2;
429 5847 : hLFE->cum_freq_models[1][2] = ivas_str_lfe_freq_models.entropy_coder_model_coarse_sg3;
430 5847 : hLFE->cum_freq_models[1][3] = &ivas_str_lfe_freq_models.entropy_coder_model_coarse_sg4;
431 :
432 : /* Initialization base2 bits for each subgroup for no entropy coding */
433 17541 : for ( i = 0; i < IVAS_MAX_NUM_QUANT_STRATS; i++ )
434 : {
435 58470 : for ( j = 0; j < IVAS_MAX_NUM_DCT_COEF_GROUPS; j++ )
436 : {
437 46776 : hLFE->lfe_enc_indices_coeffs_tbl[i][j] =
438 46776 : (int16_t) ceilf( log2f( (float) ( ivas_lfe_num_ele_in_coder_models[i][j] + 1 ) ) );
439 : }
440 : }
441 :
442 5847 : *hLFE_out = hLFE;
443 :
444 5847 : return IVAS_ERR_OK;
445 : }
446 :
447 :
448 : /*-------------------------------------------------------------------------
449 : * ivas_lfe_enc_close()
450 : *
451 : * Destroy IVAS cncoder LFE handle
452 : *-------------------------------------------------------------------------*/
453 :
454 9920 : void ivas_lfe_enc_close(
455 : LFE_ENC_HANDLE *hLFE /* i/o: LFE encoder handle */
456 : )
457 : {
458 9920 : if ( hLFE == NULL || *hLFE == NULL )
459 : {
460 4073 : return;
461 : }
462 :
463 5847 : if ( ( *hLFE )->old_wtda_audio != NULL )
464 : {
465 5847 : free( ( *hLFE )->old_wtda_audio );
466 5847 : ( *hLFE )->old_wtda_audio = NULL;
467 : }
468 5847 : if ( ( *hLFE )->pWindow_state )
469 : {
470 5847 : free( ( *hLFE )->pWindow_state );
471 5847 : ( *hLFE )->pWindow_state = NULL;
472 : }
473 :
474 5847 : free( ( *hLFE ) );
475 5847 : ( *hLFE ) = NULL;
476 :
477 5847 : return;
478 : }
479 :
480 :
481 : /*-------------------------------------------------------------------------
482 : * ivas_create_lfe_lpf_enc()
483 : *
484 : * Create, allocate and initialize IVAS encoder LFE low pass filter state handle
485 : *-------------------------------------------------------------------------*/
486 :
487 384 : ivas_error ivas_create_lfe_lpf_enc(
488 : ivas_filters_process_state_t **hLfeLpf, /* o : LFE LPF handle */
489 : const int32_t input_Fs /* i : input sampling rate */
490 : )
491 : {
492 : const float *filt_coeff;
493 :
494 384 : if ( hLfeLpf == NULL )
495 : {
496 0 : return ( IVAS_ERROR( IVAS_ERR_UNEXPECTED_NULL_POINTER, "Can not allocate memory for LFE LPF\n" ) );
497 : }
498 :
499 : /*-----------------------------------------------------------------*
500 : * Allocate LFE LPF handle
501 : *-----------------------------------------------------------------*/
502 :
503 384 : if ( ( *hLfeLpf = (ivas_filters_process_state_t *) malloc( sizeof( ivas_filters_process_state_t ) ) ) == NULL )
504 : {
505 0 : return ( IVAS_ERROR( IVAS_ERR_FAILED_ALLOC, "Can not allocate memory for LFE LPF\n" ) );
506 : }
507 :
508 384 : ivas_lfe_lpf_select_filt_coeff( input_Fs, IVAS_FILTER_ORDER_4, &filt_coeff );
509 :
510 384 : ivas_filters_init( *hLfeLpf, filt_coeff, IVAS_FILTER_ORDER_4 );
511 :
512 384 : return IVAS_ERR_OK;
513 : }
514 :
515 :
516 : /*-------------------------------------------------------------------------
517 : * ivas_lfe_lpf_enc_close()
518 : *
519 : * Destroy IVAS cncoder LFE low pass filter state
520 : *-------------------------------------------------------------------------*/
521 :
522 4269 : void ivas_lfe_lpf_enc_close(
523 : ivas_filters_process_state_t **hLfeLpf /* i/o: LFE LPF handle */
524 : )
525 : {
526 4269 : if ( hLfeLpf == NULL || *hLfeLpf == NULL )
527 : {
528 3885 : return;
529 : }
530 :
531 384 : free( ( *hLfeLpf ) );
532 384 : ( *hLfeLpf ) = NULL;
533 :
534 384 : return;
535 : }
536 :
537 :
538 : /*-------------------------------------------------------------------------
539 : * ivas_lfe_lpf_enc_apply()
540 : *
541 : * Apply IVAS cncoder LFE low pass filter
542 : *-------------------------------------------------------------------------*/
543 :
544 728490 : void ivas_lfe_lpf_enc_apply(
545 : ivas_filters_process_state_t *hLfeLpf, /* i/o: LFE LPF handle */
546 : float data_lfe_ch[], /* i/o: LFE signal */
547 : const int16_t input_frame /* i : input frame length per channel */
548 : )
549 : {
550 728490 : ivas_filter_process( hLfeLpf, data_lfe_ch, input_frame );
551 :
552 728490 : return;
553 : }
|
