1 /******************************************************************************
2 *
3 * Copyright (C) 2018 The Android Open Source Project
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 *
17 *****************************************************************************
18 * Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
19 */
20 #include <stdlib.h>
21 #include <stdio.h>
22 #include <math.h>
23 #include <string.h>
24 #include "impd_type_def.h"
25 #include "impd_drc_extr_delta_coded_info.h"
26 #include "impd_drc_common.h"
27 #include "impd_drc_struct.h"
28 #include "impd_parametric_drc_dec.h"
29 #include "impd_drc_filter_bank.h"
30 #include "impd_drc_rom.h"
31
32 #define PI 3.14159265f
33
34 #ifndef max
35 #define max(a, b) (((a) > (b)) ? (a) : (b))
36 #endif
37 #ifndef min
38 #define min(a, b) (((a) < (b)) ? (a) : (b))
39 #endif
40
impd_init_parametric_drc(WORD32 drc_frame_size,WORD32 sampling_rate,WORD32 sub_band_domain_mode,ia_parametric_drc_params_struct * p_parametricdrc_params)41 WORD32 impd_init_parametric_drc(
42 WORD32 drc_frame_size, WORD32 sampling_rate, WORD32 sub_band_domain_mode,
43 ia_parametric_drc_params_struct* p_parametricdrc_params) {
44 static const WORD32 sub_band_count_tbl[4] = {0, 64, 71, 256};
45 p_parametricdrc_params->drc_frame_size = drc_frame_size;
46 p_parametricdrc_params->sampling_rate = sampling_rate;
47 p_parametricdrc_params->sub_band_domain_mode = sub_band_domain_mode;
48
49 p_parametricdrc_params->sub_band_count =
50 sub_band_count_tbl[sub_band_domain_mode];
51
52 return 0;
53 }
54
impd_init_parametric_drc_feed_fwd(ia_drc_config * pstr_drc_config,WORD32 instance_idx,WORD32 ch_count_from_dwnmix_id,ia_parametric_drc_params_struct * p_parametricdrc_params)55 WORD32 impd_init_parametric_drc_feed_fwd(
56 ia_drc_config* pstr_drc_config, WORD32 instance_idx,
57 WORD32 ch_count_from_dwnmix_id,
58 ia_parametric_drc_params_struct* p_parametricdrc_params) {
59 WORD32 err = 0, i = 0;
60
61 WORD32 parametric_drc_idx =
62 p_parametricdrc_params->parametric_drc_idx[instance_idx];
63 WORD32 gain_set_index = p_parametricdrc_params->gain_set_index[instance_idx];
64 WORD32* channel_map = p_parametricdrc_params->channel_map[instance_idx];
65
66 ia_drc_coeff_parametric_drc_struct* hDrcCoefficientsParametricDrcBs =
67 &(pstr_drc_config->str_drc_config_ext.str_drc_coeff_param_drc);
68 ia_parametric_drc_type_feed_forward_struct* hParametricDrcTypeFeedForwardBs =
69 &(pstr_drc_config->str_drc_config_ext
70 .str_parametric_drc_instructions[parametric_drc_idx]
71 .str_parametric_drc_type_feed_forward);
72 ia_parametric_drc_type_ff_params_struct*
73 pstr_parametric_ffwd_type_drc_params =
74 &(p_parametricdrc_params
75 ->str_parametric_drc_instance_params[instance_idx]
76 .str_parametric_drc_type_ff_params);
77
78 /* level estimation */
79 pstr_parametric_ffwd_type_drc_params->frame_size =
80 p_parametricdrc_params->parametric_drc_frame_size;
81 pstr_parametric_ffwd_type_drc_params->sub_band_domain_mode =
82 p_parametricdrc_params->sub_band_domain_mode;
83 pstr_parametric_ffwd_type_drc_params->sub_band_count =
84 p_parametricdrc_params->sub_band_count;
85 pstr_parametric_ffwd_type_drc_params->sub_band_compensation_type = 0;
86
87 if (pstr_parametric_ffwd_type_drc_params->sub_band_domain_mode ==
88 SUBBAND_DOMAIN_MODE_QMF64) {
89 if (p_parametricdrc_params->sampling_rate == 48000) {
90 pstr_parametric_ffwd_type_drc_params->sub_band_compensation_type = 1;
91 } else {
92 /* support of other sampling rates than 48000 might be missing */
93 return UNEXPECTED_ERROR;
94 }
95 }
96
97 pstr_parametric_ffwd_type_drc_params->audio_num_chan =
98 p_parametricdrc_params->audio_num_chan;
99 pstr_parametric_ffwd_type_drc_params->level_estim_k_weighting_type =
100 hParametricDrcTypeFeedForwardBs->level_estim_k_weighting_type;
101 pstr_parametric_ffwd_type_drc_params->level_estim_integration_time =
102 hParametricDrcTypeFeedForwardBs->level_estim_integration_time;
103 pstr_parametric_ffwd_type_drc_params->level_estim_frame_index = 0;
104 pstr_parametric_ffwd_type_drc_params->level_estim_frame_count =
105 hParametricDrcTypeFeedForwardBs->level_estim_integration_time /
106 pstr_parametric_ffwd_type_drc_params->frame_size;
107
108 memset(pstr_parametric_ffwd_type_drc_params->level, 0,
109 PARAM_DRC_TYPE_FF_LEVEL_ESTIM_FRAME_COUNT_MAX * sizeof(FLOAT32));
110
111 if (ch_count_from_dwnmix_id != 0) {
112 memcpy(pstr_parametric_ffwd_type_drc_params->level_estim_ch_weight,
113 hDrcCoefficientsParametricDrcBs
114 ->str_parametric_drc_gain_set_params[gain_set_index]
115 .level_estim_ch_weight,
116 ch_count_from_dwnmix_id * sizeof(FLOAT32));
117 } else {
118 for (i = 0; i < pstr_parametric_ffwd_type_drc_params->audio_num_chan; i++) {
119 pstr_parametric_ffwd_type_drc_params->level_estim_ch_weight[i] =
120 (FLOAT32)channel_map[i];
121 }
122 }
123
124 if (pstr_parametric_ffwd_type_drc_params->sub_band_domain_mode ==
125 SUBBAND_DOMAIN_MODE_OFF) {
126 err = impd_init_lvl_est_filt_time(
127 pstr_parametric_ffwd_type_drc_params->level_estim_k_weighting_type,
128 p_parametricdrc_params->sampling_rate,
129 &pstr_parametric_ffwd_type_drc_params->pre_filt_coeff,
130 &pstr_parametric_ffwd_type_drc_params->rlb_filt_coeff);
131
132 if (err) return (err);
133 } else {
134 err = impd_init_lvl_est_filt_subband(
135 pstr_parametric_ffwd_type_drc_params->level_estim_k_weighting_type,
136 p_parametricdrc_params->sampling_rate,
137 p_parametricdrc_params->sub_band_domain_mode,
138 p_parametricdrc_params->sub_band_count,
139 pstr_parametric_ffwd_type_drc_params->sub_band_compensation_type,
140 pstr_parametric_ffwd_type_drc_params->weighting_filt,
141 &pstr_parametric_ffwd_type_drc_params->filt_coeff_subband);
142
143 if (err) return (err);
144 }
145
146 pstr_parametric_ffwd_type_drc_params->node_count =
147 hParametricDrcTypeFeedForwardBs->node_count;
148
149 memcpy(pstr_parametric_ffwd_type_drc_params->node_level,
150 hParametricDrcTypeFeedForwardBs->node_level,
151 pstr_parametric_ffwd_type_drc_params->node_count * sizeof(WORD32));
152 memcpy(pstr_parametric_ffwd_type_drc_params->node_gain,
153 hParametricDrcTypeFeedForwardBs->node_gain,
154 pstr_parametric_ffwd_type_drc_params->node_count * sizeof(WORD32));
155
156 pstr_parametric_ffwd_type_drc_params->ref_level_parametric_drc =
157 hDrcCoefficientsParametricDrcBs
158 ->str_parametric_drc_gain_set_params[gain_set_index]
159 .drc_input_loudness;
160
161 {
162 WORD32 gain_smooth_attack_time_fast =
163 hParametricDrcTypeFeedForwardBs->gain_smooth_attack_time_fast;
164 WORD32 gain_smooth_release_time_fast =
165 hParametricDrcTypeFeedForwardBs->gain_smooth_release_time_fast;
166 WORD32 gain_smooth_attack_time_slow =
167 hParametricDrcTypeFeedForwardBs->gain_smooth_attack_time_slow;
168 WORD32 gain_smooth_release_time_slow =
169 hParametricDrcTypeFeedForwardBs->gain_smooth_release_time_slow;
170 WORD32 gain_smooth_hold_off =
171 hParametricDrcTypeFeedForwardBs->gain_smooth_hold_off;
172 WORD32 sampling_rate = p_parametricdrc_params->sampling_rate;
173 WORD32 parametric_drc_frame_size =
174 p_parametricdrc_params->parametric_drc_frame_size;
175
176 pstr_parametric_ffwd_type_drc_params->gain_smooth_attack_alpha_fast =
177 1 -
178 (FLOAT32)exp(-1.0 * parametric_drc_frame_size /
179 (gain_smooth_attack_time_fast * sampling_rate * 0.001));
180 pstr_parametric_ffwd_type_drc_params->gain_smooth_rel_alpha_fast =
181 1 -
182 (FLOAT32)exp(-1.0 * parametric_drc_frame_size /
183 (gain_smooth_release_time_fast * sampling_rate * 0.001));
184 pstr_parametric_ffwd_type_drc_params->gain_smooth_attack_alpha_slow =
185 1 -
186 (FLOAT32)exp(-1.0 * parametric_drc_frame_size /
187 (gain_smooth_attack_time_slow * sampling_rate * 0.001));
188 pstr_parametric_ffwd_type_drc_params->gain_smooth_rel_alpha_slow =
189 1 -
190 (FLOAT32)exp(-1.0 * parametric_drc_frame_size /
191 (gain_smooth_release_time_slow * sampling_rate * 0.001));
192 pstr_parametric_ffwd_type_drc_params->gain_smooth_hold_off_count =
193 gain_smooth_hold_off * 256 * sampling_rate /
194 (parametric_drc_frame_size * 48000);
195 pstr_parametric_ffwd_type_drc_params->gain_smooth_attack_threshold =
196 hParametricDrcTypeFeedForwardBs->gain_smooth_attack_threshold;
197 pstr_parametric_ffwd_type_drc_params->gain_smooth_rel_threshold =
198 hParametricDrcTypeFeedForwardBs->gain_smooth_rel_threshold;
199 }
200
201 err =
202 impd_parametric_ffwd_type_drc_reset(pstr_parametric_ffwd_type_drc_params);
203
204 if (err) return (err);
205
206 return 0;
207 }
208
impd_init_parametric_drc_lim(ia_drc_config * pstr_drc_config,WORD32 instance_idx,WORD32 ch_count_from_dwnmix_id,ia_parametric_drc_params_struct * p_parametricdrc_params,pVOID * mem_ptr)209 VOID impd_init_parametric_drc_lim(
210 ia_drc_config* pstr_drc_config, WORD32 instance_idx,
211 WORD32 ch_count_from_dwnmix_id,
212 ia_parametric_drc_params_struct* p_parametricdrc_params, pVOID* mem_ptr) {
213 WORD32 i = 0;
214 UWORD32 j;
215 UWORD32 attack, sec_len;
216
217 WORD32 parametric_drc_idx =
218 p_parametricdrc_params->parametric_drc_idx[instance_idx];
219 WORD32 gain_set_index = p_parametricdrc_params->gain_set_index[instance_idx];
220 WORD32* channel_map = p_parametricdrc_params->channel_map[instance_idx];
221
222 ia_drc_coeff_parametric_drc_struct* hDrcCoefficientsParametricDrcBs =
223 &(pstr_drc_config->str_drc_config_ext.str_drc_coeff_param_drc);
224 ia_parametric_drc_lim_struct* hParametricDrcTypeLimBs =
225 &(pstr_drc_config->str_drc_config_ext
226 .str_parametric_drc_instructions[parametric_drc_idx]
227 .parametric_drc_lim);
228 ia_parametric_drc_type_lim_params_struct*
229 pstr_parametric_lim_type_drc_params =
230 &(p_parametricdrc_params
231 ->str_parametric_drc_instance_params[instance_idx]
232 .str_parametric_drc_type_lim_params);
233
234 pstr_parametric_lim_type_drc_params->frame_size =
235 p_parametricdrc_params->drc_frame_size;
236 pstr_parametric_lim_type_drc_params->audio_num_chan =
237 p_parametricdrc_params->audio_num_chan;
238
239 if (ch_count_from_dwnmix_id != 0) {
240 memcpy(pstr_parametric_lim_type_drc_params->level_estim_ch_weight,
241 hDrcCoefficientsParametricDrcBs
242 ->str_parametric_drc_gain_set_params[gain_set_index]
243 .level_estim_ch_weight,
244 ch_count_from_dwnmix_id * sizeof(FLOAT32));
245 } else {
246 for (i = 0; i < pstr_parametric_lim_type_drc_params->audio_num_chan; i++) {
247 pstr_parametric_lim_type_drc_params->level_estim_ch_weight[i] =
248 (FLOAT32)channel_map[i];
249 }
250 }
251
252 attack = (UWORD32)(hParametricDrcTypeLimBs->parametric_lim_attack *
253 p_parametricdrc_params->sampling_rate / 1000);
254
255 sec_len = (UWORD32)sqrt(attack + 1);
256
257 pstr_parametric_lim_type_drc_params->sec_len = sec_len;
258 pstr_parametric_lim_type_drc_params->num_max_buf_sec = (attack + 1) / sec_len;
259 if (pstr_parametric_lim_type_drc_params->num_max_buf_sec * sec_len <
260 (attack + 1))
261 pstr_parametric_lim_type_drc_params->num_max_buf_sec++;
262
263 pstr_parametric_lim_type_drc_params->max_buf = (FLOAT32*)(*mem_ptr);
264 *mem_ptr = (pVOID)((SIZE_T)(*mem_ptr) +
265 pstr_parametric_lim_type_drc_params->num_max_buf_sec *
266 sec_len * sizeof(FLOAT32));
267
268 pstr_parametric_lim_type_drc_params->attack_ms =
269 (FLOAT32)hParametricDrcTypeLimBs->parametric_lim_attack;
270 pstr_parametric_lim_type_drc_params->release_ms =
271 (FLOAT32)hParametricDrcTypeLimBs->parametric_lim_release;
272 pstr_parametric_lim_type_drc_params->attack = attack;
273 pstr_parametric_lim_type_drc_params->attack_constant =
274 (FLOAT32)pow(0.1, 1.0 / (attack + 1));
275 pstr_parametric_lim_type_drc_params->release_constant = (FLOAT32)pow(
276 0.1, 1.0 / (hParametricDrcTypeLimBs->parametric_lim_release *
277 p_parametricdrc_params->sampling_rate / 1000 +
278 1));
279 pstr_parametric_lim_type_drc_params->threshold = (FLOAT32)pow(
280 10.0f, 0.05f * hParametricDrcTypeLimBs->parametric_lim_threshold);
281 pstr_parametric_lim_type_drc_params->channels =
282 pstr_parametric_lim_type_drc_params->audio_num_chan;
283 pstr_parametric_lim_type_drc_params->sampling_rate =
284 p_parametricdrc_params->sampling_rate;
285 pstr_parametric_lim_type_drc_params->cor = 1.0f;
286 pstr_parametric_lim_type_drc_params->smooth_state_0 = 1.0;
287
288 for (j = 0; j < pstr_parametric_lim_type_drc_params->num_max_buf_sec *
289 pstr_parametric_lim_type_drc_params->sec_len;
290 j++) {
291 pstr_parametric_lim_type_drc_params->max_buf[j] = 0.f;
292 }
293 }
294
impd_init_parametric_drcInstance(ia_drc_config * pstr_drc_config,WORD32 instance_idx,WORD32 ch_count_from_dwnmix_id,ia_parametric_drc_params_struct * p_parametricdrc_params,pVOID * mem_ptr)295 WORD32 impd_init_parametric_drcInstance(
296 ia_drc_config* pstr_drc_config, WORD32 instance_idx,
297 WORD32 ch_count_from_dwnmix_id,
298 ia_parametric_drc_params_struct* p_parametricdrc_params, pVOID* mem_ptr) {
299 WORD32 err = 0;
300
301 WORD32 parametric_drc_idx =
302 p_parametricdrc_params->parametric_drc_idx[instance_idx];
303 ia_parametric_drc_instructions_struct* hParametricDrcInstructions =
304 &(pstr_drc_config->str_drc_config_ext
305 .str_parametric_drc_instructions[parametric_drc_idx]);
306
307 p_parametricdrc_params->str_parametric_drc_instance_params[instance_idx]
308 .disable_paramteric_drc =
309 hParametricDrcInstructions->disable_paramteric_drc;
310 p_parametricdrc_params->str_parametric_drc_instance_params[instance_idx]
311 .parametric_drc_type = hParametricDrcInstructions->parametric_drc_type;
312 p_parametricdrc_params->str_parametric_drc_instance_params[instance_idx]
313 .str_spline_nodes.num_nodes = p_parametricdrc_params->num_nodes;
314
315 if (p_parametricdrc_params->str_parametric_drc_instance_params[instance_idx]
316 .disable_paramteric_drc == 0) {
317 if (p_parametricdrc_params->str_parametric_drc_instance_params[instance_idx]
318 .parametric_drc_type == PARAM_DRC_TYPE_FF) {
319 err = impd_init_parametric_drc_feed_fwd(pstr_drc_config, instance_idx,
320 ch_count_from_dwnmix_id,
321 p_parametricdrc_params);
322
323 if (err) return (err);
324
325 } else if (p_parametricdrc_params
326 ->str_parametric_drc_instance_params[instance_idx]
327 .parametric_drc_type == PARAM_DRC_TYPE_LIM) {
328 p_parametricdrc_params->str_parametric_drc_instance_params[instance_idx]
329 .str_spline_nodes.num_nodes = p_parametricdrc_params->drc_frame_size;
330
331 impd_init_parametric_drc_lim(pstr_drc_config, instance_idx,
332 ch_count_from_dwnmix_id,
333 p_parametricdrc_params, mem_ptr);
334
335 } else {
336 return (UNEXPECTED_ERROR);
337 }
338 }
339
340 return 0;
341 }
342
impd_init_parametric_drc_after_config(ia_drc_config * pstr_drc_config,ia_drc_loudness_info_set_struct * pstr_loudness_info,ia_parametric_drc_params_struct * p_parametricdrc_params,pVOID * mem_ptr)343 WORD32 impd_init_parametric_drc_after_config(
344 ia_drc_config* pstr_drc_config,
345 ia_drc_loudness_info_set_struct* pstr_loudness_info,
346 ia_parametric_drc_params_struct* p_parametricdrc_params, pVOID* mem_ptr) {
347 WORD32 err = 0, instance_idx = 0, gain_set_index = 0,
348 side_chain_config_type = 0, downmix_id = 0,
349 ch_count_from_dwnmix_id = 0, L = 0;
350
351 p_parametricdrc_params->parametric_drc_frame_size =
352 pstr_drc_config->str_drc_config_ext.str_drc_coeff_param_drc
353 .parametric_drc_frame_size;
354 p_parametricdrc_params->reset_parametric_drc =
355 pstr_drc_config->str_drc_config_ext.str_drc_coeff_param_drc
356 .reset_parametric_drc;
357 p_parametricdrc_params->num_nodes =
358 p_parametricdrc_params->drc_frame_size /
359 p_parametricdrc_params->parametric_drc_frame_size;
360
361 switch (p_parametricdrc_params->sub_band_domain_mode) {
362 case SUBBAND_DOMAIN_MODE_QMF64:
363 L = AUDIO_CODEC_SUBBAND_DOWNSAMPLING_FACTOR_QMF64;
364 break;
365 case SUBBAND_DOMAIN_MODE_QMF71:
366 L = AUDIO_CODEC_SUBBAND_DOWNSAMPLING_FACTOR_QMF71;
367 break;
368 case SUBBAND_DOMAIN_MODE_STFT256:
369 L = AUDIO_CODEC_SUBBAND_DOWNSAMPLING_FACTOR_STFT256;
370 break;
371 case SUBBAND_DOMAIN_MODE_OFF:
372 default:
373 L = 0;
374 break;
375 }
376
377 if (p_parametricdrc_params->sub_band_domain_mode != SUBBAND_DOMAIN_MODE_OFF &&
378 p_parametricdrc_params->parametric_drc_frame_size != L) {
379 return (EXTERNAL_ERROR);
380 }
381
382 for (instance_idx = 0;
383 instance_idx < p_parametricdrc_params->parametric_drc_instance_count;
384 instance_idx++) {
385 gain_set_index = p_parametricdrc_params->gain_set_index[instance_idx];
386 side_chain_config_type =
387 pstr_drc_config->str_drc_config_ext.str_drc_coeff_param_drc
388 .str_parametric_drc_gain_set_params[gain_set_index]
389 .side_chain_config_type;
390 downmix_id = pstr_drc_config->str_drc_config_ext.str_drc_coeff_param_drc
391 .str_parametric_drc_gain_set_params[gain_set_index]
392 .downmix_id;
393
394 if (side_chain_config_type == 1 &&
395 downmix_id ==
396 p_parametricdrc_params
397 ->dwnmix_id_from_drc_instructions[instance_idx]) {
398 ch_count_from_dwnmix_id =
399 pstr_drc_config->str_drc_config_ext.str_drc_coeff_param_drc
400 .str_parametric_drc_gain_set_params[gain_set_index]
401 .ch_count_from_dwnmix_id;
402 } else {
403 ch_count_from_dwnmix_id = 0;
404 }
405
406 if (pstr_drc_config->str_drc_config_ext.str_drc_coeff_param_drc
407 .str_parametric_drc_gain_set_params[gain_set_index]
408 .drc_input_loudness_present == 0) {
409 WORD32 n = 0, m = 0, drcInputLoudnessFound = 0;
410 FLOAT32 drc_input_loudness = 0.f;
411
412 for (n = 0; n < pstr_loudness_info->loudness_info_count; n++) {
413 ia_loudness_info_struct* loudness_info =
414 &pstr_loudness_info->loudness_info[n];
415 if (p_parametricdrc_params
416 ->dwnmix_id_from_drc_instructions[instance_idx] ==
417 loudness_info->downmix_id) {
418 if (0 == loudness_info->drc_set_id) {
419 for (m = 0; m < loudness_info->measurement_count; m++) {
420 if (loudness_info->loudness_measure[m].method_def ==
421 METHOD_DEFINITION_PROGRAM_LOUDNESS) {
422 drc_input_loudness =
423 loudness_info->loudness_measure[m].method_val;
424 drcInputLoudnessFound = 1;
425 break;
426 }
427 }
428 if (drcInputLoudnessFound == 0) {
429 for (m = 0; m < loudness_info->measurement_count; m++) {
430 if (loudness_info->loudness_measure[m].method_def ==
431 METHOD_DEFINITION_ANCHOR_LOUDNESS) {
432 drc_input_loudness =
433 loudness_info->loudness_measure[m].method_val;
434 drcInputLoudnessFound = 1;
435 break;
436 }
437 }
438 }
439 }
440 }
441 }
442 if (drcInputLoudnessFound == 0) {
443 for (n = 0; n < pstr_loudness_info->loudness_info_count; n++) {
444 ia_loudness_info_struct* loudness_info =
445 &pstr_loudness_info->loudness_info[n];
446 if (0 == loudness_info->downmix_id) {
447 if (0 == loudness_info->drc_set_id) {
448 for (m = 0; m < loudness_info->measurement_count; m++) {
449 if (loudness_info->loudness_measure[m].method_def ==
450 METHOD_DEFINITION_PROGRAM_LOUDNESS) {
451 drc_input_loudness =
452 loudness_info->loudness_measure[m].method_val;
453 drcInputLoudnessFound = 1;
454 break;
455 }
456 }
457 if (drcInputLoudnessFound == 0) {
458 for (m = 0; m < loudness_info->measurement_count; m++) {
459 if (loudness_info->loudness_measure[m].method_def ==
460 METHOD_DEFINITION_ANCHOR_LOUDNESS) {
461 drc_input_loudness =
462 loudness_info->loudness_measure[m].method_val;
463 drcInputLoudnessFound = 1;
464 break;
465 }
466 }
467 }
468 }
469 }
470 }
471 }
472 if (drcInputLoudnessFound == 0) {
473 return (UNEXPECTED_ERROR);
474 } else {
475 pstr_drc_config->str_drc_config_ext.str_drc_coeff_param_drc
476 .str_parametric_drc_gain_set_params[gain_set_index]
477 .drc_input_loudness = drc_input_loudness;
478 }
479 }
480
481 impd_init_parametric_drcInstance(pstr_drc_config, instance_idx,
482 ch_count_from_dwnmix_id,
483 p_parametricdrc_params, mem_ptr);
484 if (err) return (err);
485 }
486
487 return 0;
488 }
489
impd_init_lvl_est_filt_time(WORD32 level_estim_k_weighting_type,WORD32 sampling_rate,ia_2nd_order_filt_coeff_struct * pre_filt_coeff,ia_2nd_order_filt_coeff_struct * rlb_filt_coeff)490 WORD32 impd_init_lvl_est_filt_time(
491 WORD32 level_estim_k_weighting_type, WORD32 sampling_rate,
492 ia_2nd_order_filt_coeff_struct* pre_filt_coeff,
493 ia_2nd_order_filt_coeff_struct* rlb_filt_coeff) {
494 WORD32 i;
495 const FLOAT32* ptr_samp_tbl;
496
497 switch (sampling_rate) {
498 case 96000:
499 i = 0;
500 break;
501 case 88200:
502 i = 1;
503 break;
504 case 64000:
505 i = 2;
506 break;
507 case 48000:
508 i = 3;
509 break;
510 case 44100:
511 i = 4;
512 break;
513 case 32000:
514 i = 5;
515 break;
516 case 24000:
517 i = 6;
518 break;
519 case 22050:
520 i = 7;
521 break;
522 case 16000:
523 i = 8;
524 break;
525 case 12000:
526 i = 9;
527 break;
528 case 11025:
529 i = 10;
530 break;
531 case 8000:
532 i = 11;
533 break;
534 case 7350:
535 i = 12;
536 break;
537 default:
538 i = 3;
539 break;
540 }
541
542 ptr_samp_tbl = samp_rate_tbl[i];
543
544 if (level_estim_k_weighting_type == 2) {
545 pre_filt_coeff->b0 = ptr_samp_tbl[0];
546 pre_filt_coeff->b1 = ptr_samp_tbl[1];
547 pre_filt_coeff->b2 = ptr_samp_tbl[2];
548 pre_filt_coeff->a1 = ptr_samp_tbl[3];
549 pre_filt_coeff->a2 = ptr_samp_tbl[4];
550 }
551
552 if (level_estim_k_weighting_type == 1 || level_estim_k_weighting_type == 2) {
553 rlb_filt_coeff->b0 = ptr_samp_tbl[5];
554 rlb_filt_coeff->b1 = ptr_samp_tbl[6];
555 rlb_filt_coeff->b2 = ptr_samp_tbl[7];
556 rlb_filt_coeff->a1 = ptr_samp_tbl[8];
557 rlb_filt_coeff->a2 = ptr_samp_tbl[9];
558 }
559
560 return 0;
561 }
562
impd_init_lvl_est_filt_subband(WORD32 level_estim_k_weighting_type,WORD32 sampling_rate,WORD32 sub_band_domain_mode,WORD32 sub_band_count,WORD32 sub_band_compensation_type,FLOAT32 * weighting_filt,ia_2nd_order_filt_coeff_struct * filt_coeff_subband)563 WORD32 impd_init_lvl_est_filt_subband(
564 WORD32 level_estim_k_weighting_type, WORD32 sampling_rate,
565 WORD32 sub_band_domain_mode, WORD32 sub_band_count,
566 WORD32 sub_band_compensation_type, FLOAT32* weighting_filt,
567 ia_2nd_order_filt_coeff_struct* filt_coeff_subband) {
568 FLOAT32 w0, alpha, sinw0, cosw0;
569 FLOAT32 b0, b1, b2, a0, a1, a2;
570 FLOAT32 num_real, num_imag, den_real, den_imag;
571 const FLOAT32* f_bands_nrm;
572 WORD32 b;
573 WORD32 i;
574 const FLOAT32* ptr_samp_tbl;
575
576 switch (sampling_rate) {
577 case 96000:
578 i = 0;
579 break;
580 case 88200:
581 i = 1;
582 break;
583 case 64000:
584 i = 2;
585 break;
586 case 48000:
587 i = 3;
588 break;
589 case 44100:
590 i = 4;
591 break;
592 case 32000:
593 i = 5;
594 break;
595 case 24000:
596 i = 6;
597 break;
598 case 22050:
599 i = 7;
600 break;
601 case 16000:
602 i = 8;
603 break;
604 case 12000:
605 i = 9;
606 break;
607 case 11025:
608 i = 10;
609 break;
610 case 8000:
611 i = 11;
612 break;
613 case 7350:
614 i = 12;
615 break;
616 default:
617 i = 3;
618 break;
619 }
620
621 ptr_samp_tbl = samp_rate_tbl[i];
622
623 switch (sub_band_domain_mode) {
624 case SUBBAND_DOMAIN_MODE_QMF64:
625 f_bands_nrm = f_bands_nrm_QMF64;
626 break;
627 case SUBBAND_DOMAIN_MODE_QMF71:
628 f_bands_nrm = f_bands_nrm_QMF71;
629 break;
630 case SUBBAND_DOMAIN_MODE_STFT256:
631 f_bands_nrm = f_bands_nrm_STFT256;
632 break;
633 default:
634 return UNEXPECTED_ERROR;
635 break;
636 }
637
638 for (b = 0; b < sub_band_count; b++) {
639 weighting_filt[b] = 1.f;
640 }
641
642 if (level_estim_k_weighting_type == 2) {
643 b0 = ptr_samp_tbl[0];
644 b1 = ptr_samp_tbl[1];
645 b2 = ptr_samp_tbl[2];
646 a1 = ptr_samp_tbl[3];
647 a2 = ptr_samp_tbl[4];
648 a0 = 1.f;
649
650 for (b = 0; b < sub_band_count; b++) {
651 num_real = b0 + b1 * (FLOAT32)cos(PI * f_bands_nrm[b]) +
652 b2 * (FLOAT32)cos(PI * 2 * f_bands_nrm[b]);
653 num_imag = -b1 * (FLOAT32)sin(PI * f_bands_nrm[b]) -
654 b2 * (FLOAT32)sin(PI * 2 * f_bands_nrm[b]);
655 den_real = a0 + a1 * (FLOAT32)cos(PI * f_bands_nrm[b]) +
656 a2 * (FLOAT32)cos(PI * 2 * f_bands_nrm[b]);
657 den_imag = -a1 * (FLOAT32)sin(PI * f_bands_nrm[b]) -
658 a2 * (FLOAT32)sin(PI * 2 * f_bands_nrm[b]);
659
660 weighting_filt[b] *=
661 (FLOAT32)(sqrt((num_real * num_real + num_imag * num_imag) /
662 (den_real * den_real + den_imag * den_imag)));
663 }
664 }
665
666 if (level_estim_k_weighting_type == 1 || level_estim_k_weighting_type == 2) {
667 b0 = ptr_samp_tbl[5];
668 b1 = ptr_samp_tbl[6];
669 b2 = ptr_samp_tbl[7];
670 a1 = ptr_samp_tbl[8];
671 a2 = ptr_samp_tbl[9];
672 a0 = 1.f;
673
674 for (b = 0; b < sub_band_count; b++) {
675 if (!(sub_band_compensation_type == 1 && b == 0)) {
676 num_real = (FLOAT32)(b0 + b1 * cos(PI * f_bands_nrm[b]) +
677 b2 * cos(PI * 2 * f_bands_nrm[b]));
678 num_imag = (FLOAT32)(-b1 * sin(PI * f_bands_nrm[b]) -
679 b2 * sin(PI * 2 * f_bands_nrm[b]));
680 den_real = (FLOAT32)(a0 + a1 * cos(PI * f_bands_nrm[b]) +
681 a2 * cos(PI * 2 * f_bands_nrm[b]));
682 den_imag = (FLOAT32)(-a1 * sin(PI * f_bands_nrm[b]) -
683 a2 * sin(PI * 2 * f_bands_nrm[b]));
684
685 weighting_filt[b] *=
686 (FLOAT32)(sqrt((num_real * num_real + num_imag * num_imag) /
687 (den_real * den_real + den_imag * den_imag)));
688 }
689 }
690
691 if (sub_band_compensation_type == 1) {
692 w0 = 2.0f * PI * 38.0f / (FLOAT32)sampling_rate *
693 AUDIO_CODEC_SUBBAND_DOWNSAMPLING_FACTOR_QMF64;
694 sinw0 = (FLOAT32)sin(w0);
695 cosw0 = (FLOAT32)cos(w0);
696 alpha = sinw0;
697
698 b0 = (1 + cosw0) / 2;
699 b1 = -(1 + cosw0);
700 b2 = (1 + cosw0) / 2;
701 a0 = 1 + alpha;
702 a1 = -2 * cosw0;
703 a2 = 1 - alpha;
704
705 filt_coeff_subband->b0 = b0 / a0;
706 filt_coeff_subband->b1 = b1 / a0;
707 filt_coeff_subband->b2 = b2 / a0;
708 filt_coeff_subband->a1 = a1 / a0;
709 filt_coeff_subband->a2 = a2 / a0;
710 }
711 }
712
713 return 0;
714 }
715
impd_parametric_ffwd_type_drc_reset(ia_parametric_drc_type_ff_params_struct * pstr_parametric_ffwd_type_drc_params)716 WORD32 impd_parametric_ffwd_type_drc_reset(
717 ia_parametric_drc_type_ff_params_struct*
718 pstr_parametric_ffwd_type_drc_params) {
719 WORD32 i = 0;
720
721 pstr_parametric_ffwd_type_drc_params->level_estim_frame_index = 0;
722 pstr_parametric_ffwd_type_drc_params->start_up_phase = 1;
723 for (i = 0; i < PARAM_DRC_TYPE_FF_LEVEL_ESTIM_FRAME_COUNT_MAX; i++) {
724 pstr_parametric_ffwd_type_drc_params->level[i] = 0.f;
725 }
726
727 for (i = 0; i < MAX_CHANNEL_COUNT; i++) {
728 pstr_parametric_ffwd_type_drc_params->pre_filt_state[i].z1 = 0.f;
729 pstr_parametric_ffwd_type_drc_params->pre_filt_state[i].z2 = 0.f;
730 pstr_parametric_ffwd_type_drc_params->rlb_filt_state[i].z1 = 0.f;
731 pstr_parametric_ffwd_type_drc_params->rlb_filt_state[i].z2 = 0.f;
732 pstr_parametric_ffwd_type_drc_params->filt_state_subband_real[i].z1 = 0.f;
733 pstr_parametric_ffwd_type_drc_params->filt_state_subband_real[i].z2 = 0.f;
734 pstr_parametric_ffwd_type_drc_params->filt_state_subband_imag[i].z1 = 0.f;
735 pstr_parametric_ffwd_type_drc_params->filt_state_subband_imag[i].z2 = 0.f;
736 }
737
738 pstr_parametric_ffwd_type_drc_params->db_level_smooth = -135.f;
739 pstr_parametric_ffwd_type_drc_params->db_gain_smooth = 0.f;
740 pstr_parametric_ffwd_type_drc_params->hold_counter = 0;
741
742 return 0;
743 }
744
impd_parametric_drc_instance_process(FLOAT32 * audio_in_out_buf[],FLOAT32 * audio_real_buff[],FLOAT32 * audio_imag_buff[],ia_parametric_drc_params_struct * p_parametricdrc_params,ia_parametric_drc_instance_params_struct * pstr_parametric_drc_instance_params)745 WORD32 impd_parametric_drc_instance_process(
746 FLOAT32* audio_in_out_buf[], FLOAT32* audio_real_buff[],
747 FLOAT32* audio_imag_buff[],
748 ia_parametric_drc_params_struct* p_parametricdrc_params,
749 ia_parametric_drc_instance_params_struct*
750 pstr_parametric_drc_instance_params) {
751 WORD32 err = 0, i = 0;
752
753 if (pstr_parametric_drc_instance_params->disable_paramteric_drc) {
754 for (i = 0; i < p_parametricdrc_params->num_nodes; i++) {
755 pstr_parametric_drc_instance_params->str_spline_nodes.str_node[i]
756 .loc_db_gain = 0.f;
757 pstr_parametric_drc_instance_params->str_spline_nodes.str_node[i].slope =
758 0.f;
759 pstr_parametric_drc_instance_params->str_spline_nodes.str_node[i].time =
760 (i + 1) * p_parametricdrc_params->parametric_drc_frame_size - 1;
761 }
762
763 } else {
764 if (pstr_parametric_drc_instance_params->parametric_drc_type ==
765 PARAM_DRC_TYPE_FF) {
766 ia_parametric_drc_type_ff_params_struct*
767 pstr_parametric_ffwd_type_drc_params =
768 &(pstr_parametric_drc_instance_params
769 ->str_parametric_drc_type_ff_params);
770 for (i = 0; i < p_parametricdrc_params->num_nodes; i++) {
771 err = impd_parametric_ffwd_type_drc_process(
772 audio_in_out_buf, audio_real_buff, audio_imag_buff, i,
773 pstr_parametric_ffwd_type_drc_params,
774 &pstr_parametric_drc_instance_params->str_spline_nodes);
775 if (err) return (err);
776 }
777
778 } else if (pstr_parametric_drc_instance_params->parametric_drc_type ==
779 PARAM_DRC_TYPE_LIM) {
780 return (UNEXPECTED_ERROR);
781
782 } else {
783 return (UNEXPECTED_ERROR);
784 }
785 }
786
787 return 0;
788 }
789
iir_second_order_filter(ia_2nd_order_filt_coeff_struct * coeff,ia_2nd_order_filt_state_struct * state,WORD32 frame_len,FLOAT32 * input,FLOAT32 * output)790 VOID iir_second_order_filter(ia_2nd_order_filt_coeff_struct* coeff,
791 ia_2nd_order_filt_state_struct* state,
792 WORD32 frame_len, FLOAT32* input,
793 FLOAT32* output) {
794 FLOAT32 z2 = state->z2;
795 FLOAT32 z1 = state->z1;
796 FLOAT32 z0;
797 WORD32 i;
798
799 for (i = 0; i < frame_len; i++) {
800 z0 = input[i] - coeff->a1 * z1 - coeff->a2 * z2;
801 output[i] = coeff->b0 * z0 + coeff->b1 * z1 + coeff->b2 * z2;
802 z2 = z1;
803 z1 = z0;
804 }
805 state->z1 = z1;
806 state->z2 = z2;
807 }
impd_parametric_ffwd_type_drc_process(FLOAT32 * audio_in_out_buf[],FLOAT32 * audio_real_buff[],FLOAT32 * audio_imag_buff[],WORD32 nodeIdx,ia_parametric_drc_type_ff_params_struct * pstr_parametric_ffwd_type_drc_params,ia_spline_nodes_struct * str_spline_nodes)808 WORD32 impd_parametric_ffwd_type_drc_process(
809 FLOAT32* audio_in_out_buf[], FLOAT32* audio_real_buff[],
810 FLOAT32* audio_imag_buff[], WORD32 nodeIdx,
811 ia_parametric_drc_type_ff_params_struct*
812 pstr_parametric_ffwd_type_drc_params,
813 ia_spline_nodes_struct* str_spline_nodes) {
814 WORD32 c, t, b, n, i, offset;
815 FLOAT32 x, y, channelLevel, level, levelDb, loc_db_gain, levelDelta, alpha;
816
817 WORD32 frame_size = pstr_parametric_ffwd_type_drc_params->frame_size;
818 WORD32 sub_band_count = pstr_parametric_ffwd_type_drc_params->sub_band_count;
819 FLOAT32* level_estim_ch_weight =
820 pstr_parametric_ffwd_type_drc_params->level_estim_ch_weight;
821 WORD32 level_estim_k_weighting_type =
822 pstr_parametric_ffwd_type_drc_params->level_estim_k_weighting_type;
823
824 ia_2nd_order_filt_coeff_struct preC =
825 pstr_parametric_ffwd_type_drc_params->pre_filt_coeff;
826 ia_2nd_order_filt_coeff_struct rlbC =
827 pstr_parametric_ffwd_type_drc_params->rlb_filt_coeff;
828 ia_2nd_order_filt_state_struct* preS =
829 pstr_parametric_ffwd_type_drc_params->pre_filt_state;
830 ia_2nd_order_filt_state_struct* rlbS =
831 pstr_parametric_ffwd_type_drc_params->rlb_filt_state;
832
833 ia_2nd_order_filt_coeff_struct rlbC_sb =
834 pstr_parametric_ffwd_type_drc_params->filt_coeff_subband;
835 ia_2nd_order_filt_state_struct* rlbS_sbReal =
836 pstr_parametric_ffwd_type_drc_params->filt_state_subband_real;
837 ia_2nd_order_filt_state_struct* rlbS_sbImag =
838 pstr_parametric_ffwd_type_drc_params->filt_state_subband_imag;
839 FLOAT32* weighting_filt =
840 pstr_parametric_ffwd_type_drc_params->weighting_filt;
841 WORD32 sub_band_compensation_type =
842 pstr_parametric_ffwd_type_drc_params->sub_band_compensation_type;
843
844 if (audio_in_out_buf != NULL) {
845 level = 0;
846 offset = nodeIdx * pstr_parametric_ffwd_type_drc_params->frame_size;
847 for (c = 0; c < pstr_parametric_ffwd_type_drc_params->audio_num_chan; c++) {
848 channelLevel = 0.f;
849
850 if (!level_estim_ch_weight[c]) continue;
851
852 if (level_estim_k_weighting_type == 0) {
853 for (t = 0; t < frame_size; t++) {
854 x = audio_in_out_buf[c][offset + t];
855
856 channelLevel += x * x;
857 }
858
859 } else if (level_estim_k_weighting_type == 1) {
860 for (t = 0; t < frame_size; t++) {
861 x = audio_in_out_buf[c][offset + t];
862
863 iir_second_order_filter(&rlbC, &rlbS[c], 1, &x, &x);
864
865 channelLevel += x * x;
866 }
867
868 } else if (level_estim_k_weighting_type == 2) {
869 for (t = 0; t < frame_size; t++) {
870 x = audio_in_out_buf[c][offset + t];
871
872 iir_second_order_filter(&preC, &preS[c], 1, &x, &x);
873
874 iir_second_order_filter(&rlbC, &rlbS[c], 1, &x, &x);
875
876 channelLevel += x * x;
877 }
878
879 } else {
880 return (UNEXPECTED_ERROR);
881 }
882
883 level += level_estim_ch_weight[c] * channelLevel;
884 }
885
886 } else {
887 level = 0;
888 offset = nodeIdx * pstr_parametric_ffwd_type_drc_params->sub_band_count;
889 for (c = 0; c < pstr_parametric_ffwd_type_drc_params->audio_num_chan; c++) {
890 channelLevel = 0.f;
891
892 if (!level_estim_ch_weight[c]) continue;
893
894 if (level_estim_k_weighting_type == 0) {
895 for (b = 0; b < sub_band_count; b++) {
896 x = audio_real_buff[c][offset + b];
897 y = audio_imag_buff[c][offset + b];
898
899 channelLevel += x * x + y * y;
900 }
901
902 } else if (level_estim_k_weighting_type == 1 ||
903 level_estim_k_weighting_type == 2) {
904 for (b = 0; b < sub_band_count; b++) {
905 x = audio_real_buff[c][offset + b] * weighting_filt[b];
906 y = audio_imag_buff[c][offset + b] * weighting_filt[b];
907
908 if (b == 0 && sub_band_compensation_type == 1) {
909 iir_second_order_filter(&rlbC_sb, &rlbS_sbReal[c], 1, &x, &x);
910
911 iir_second_order_filter(&rlbC_sb, &rlbS_sbImag[c], 1, &y, &y);
912 }
913
914 channelLevel += x * x + y * y;
915 }
916
917 } else {
918 return (UNEXPECTED_ERROR);
919 }
920
921 level += level_estim_ch_weight[c] * channelLevel;
922 }
923
924 level /= sub_band_count;
925 }
926 pstr_parametric_ffwd_type_drc_params
927 ->level[pstr_parametric_ffwd_type_drc_params->level_estim_frame_index] =
928 level;
929 pstr_parametric_ffwd_type_drc_params->level_estim_frame_index++;
930
931 level = 0.f;
932 if (pstr_parametric_ffwd_type_drc_params->start_up_phase) {
933 for (i = 0;
934 i < pstr_parametric_ffwd_type_drc_params->level_estim_frame_index;
935 i++) {
936 level += pstr_parametric_ffwd_type_drc_params->level[i];
937 }
938 level /= pstr_parametric_ffwd_type_drc_params->level_estim_frame_index *
939 pstr_parametric_ffwd_type_drc_params->frame_size;
940 } else {
941 for (i = 0;
942 i < pstr_parametric_ffwd_type_drc_params->level_estim_frame_count;
943 i++) {
944 level += pstr_parametric_ffwd_type_drc_params->level[i];
945 }
946 level /= pstr_parametric_ffwd_type_drc_params->level_estim_integration_time;
947 }
948 if (pstr_parametric_ffwd_type_drc_params->level_estim_frame_index ==
949 pstr_parametric_ffwd_type_drc_params->level_estim_frame_count) {
950 pstr_parametric_ffwd_type_drc_params->level_estim_frame_index = 0;
951 pstr_parametric_ffwd_type_drc_params->start_up_phase = 0;
952 }
953
954 if (level < 1e-10f) level = 1e-10f;
955 if (level_estim_k_weighting_type == 2) {
956 levelDb = -0.691f + 10 * (FLOAT32)log10(level) + 3;
957 } else {
958 levelDb = 10 * (FLOAT32)log10(level) + 3;
959 }
960 levelDb -= pstr_parametric_ffwd_type_drc_params->ref_level_parametric_drc;
961
962 for (n = 0; n < pstr_parametric_ffwd_type_drc_params->node_count; n++) {
963 if (levelDb <=
964 (FLOAT32)pstr_parametric_ffwd_type_drc_params->node_level[n]) {
965 break;
966 }
967 }
968 if (n == 0) {
969 loc_db_gain = (FLOAT32)pstr_parametric_ffwd_type_drc_params->node_gain[n];
970 } else if (n == pstr_parametric_ffwd_type_drc_params->node_count) {
971 loc_db_gain =
972 (FLOAT32)pstr_parametric_ffwd_type_drc_params->node_gain[n - 1] -
973 levelDb +
974 (FLOAT32)pstr_parametric_ffwd_type_drc_params->node_level[n - 1];
975 } else {
976 loc_db_gain =
977 (FLOAT32)pstr_parametric_ffwd_type_drc_params->node_gain[n] +
978 (levelDb -
979 (FLOAT32)pstr_parametric_ffwd_type_drc_params->node_level[n]) /
980 (FLOAT32)(pstr_parametric_ffwd_type_drc_params->node_level[n - 1] -
981 pstr_parametric_ffwd_type_drc_params->node_level[n]) *
982 (FLOAT32)(pstr_parametric_ffwd_type_drc_params->node_gain[n - 1] -
983 pstr_parametric_ffwd_type_drc_params->node_gain[n]);
984 }
985
986 levelDelta = levelDb - pstr_parametric_ffwd_type_drc_params->db_level_smooth;
987 if (loc_db_gain < pstr_parametric_ffwd_type_drc_params->db_gain_smooth) {
988 if (levelDelta >
989 pstr_parametric_ffwd_type_drc_params->gain_smooth_attack_threshold) {
990 alpha =
991 pstr_parametric_ffwd_type_drc_params->gain_smooth_attack_alpha_fast;
992 } else {
993 alpha =
994 pstr_parametric_ffwd_type_drc_params->gain_smooth_attack_alpha_slow;
995 }
996 } else {
997 if (levelDelta <
998 -pstr_parametric_ffwd_type_drc_params->gain_smooth_rel_threshold) {
999 alpha = pstr_parametric_ffwd_type_drc_params->gain_smooth_rel_alpha_fast;
1000 } else {
1001 alpha = pstr_parametric_ffwd_type_drc_params->gain_smooth_rel_alpha_slow;
1002 }
1003 }
1004 if (loc_db_gain < pstr_parametric_ffwd_type_drc_params->db_gain_smooth ||
1005 pstr_parametric_ffwd_type_drc_params->hold_counter == 0) {
1006 pstr_parametric_ffwd_type_drc_params->db_level_smooth =
1007 (1 - alpha) * pstr_parametric_ffwd_type_drc_params->db_level_smooth +
1008 alpha * levelDb;
1009 pstr_parametric_ffwd_type_drc_params->db_gain_smooth =
1010 (1 - alpha) * pstr_parametric_ffwd_type_drc_params->db_gain_smooth +
1011 alpha * loc_db_gain;
1012 }
1013 if (pstr_parametric_ffwd_type_drc_params->hold_counter) {
1014 pstr_parametric_ffwd_type_drc_params->hold_counter -= 1;
1015 }
1016 if (loc_db_gain < pstr_parametric_ffwd_type_drc_params->db_gain_smooth) {
1017 pstr_parametric_ffwd_type_drc_params->hold_counter =
1018 pstr_parametric_ffwd_type_drc_params->gain_smooth_hold_off_count;
1019 }
1020
1021 str_spline_nodes->str_node[nodeIdx].loc_db_gain =
1022 pstr_parametric_ffwd_type_drc_params->db_gain_smooth;
1023 str_spline_nodes->str_node[nodeIdx].slope = 0.f;
1024 str_spline_nodes->str_node[nodeIdx].time =
1025 pstr_parametric_ffwd_type_drc_params->frame_size + offset - 1;
1026
1027 return 0;
1028 }
1029
impd_parametric_lim_type_drc_process(FLOAT32 * samples[],FLOAT32 loudness_normalization_gain_db,ia_parametric_drc_type_lim_params_struct * pstr_parametric_lim_type_drc_params,FLOAT32 * lpcm_gains)1030 WORD32 impd_parametric_lim_type_drc_process(
1031 FLOAT32* samples[], FLOAT32 loudness_normalization_gain_db,
1032 ia_parametric_drc_type_lim_params_struct*
1033 pstr_parametric_lim_type_drc_params,
1034 FLOAT32* lpcm_gains) {
1035 WORD32 i, j;
1036 FLOAT32 tmp, gain;
1037 // FLOAT32 min_gain = 1;
1038 FLOAT32 maximum, sectionMaximum;
1039 FLOAT32 loudness_normalization_gain =
1040 (FLOAT32)pow(10.0f, 0.05f * loudness_normalization_gain_db);
1041 FLOAT32* level_estim_ch_weight =
1042 pstr_parametric_lim_type_drc_params->level_estim_ch_weight;
1043 WORD32 num_channels = pstr_parametric_lim_type_drc_params->channels;
1044 WORD32 attack_time_samples = pstr_parametric_lim_type_drc_params->attack;
1045 FLOAT32 attack_constant =
1046 pstr_parametric_lim_type_drc_params->attack_constant;
1047 FLOAT32 release_constant =
1048 pstr_parametric_lim_type_drc_params->release_constant;
1049 FLOAT32 limit_threshold = pstr_parametric_lim_type_drc_params->threshold;
1050 FLOAT32* max_buf = pstr_parametric_lim_type_drc_params->max_buf;
1051 FLOAT32 gain_modified = pstr_parametric_lim_type_drc_params->cor;
1052 FLOAT64 pre_smoothed_gain =
1053 pstr_parametric_lim_type_drc_params->smooth_state_0;
1054
1055 for (i = 0; i < pstr_parametric_lim_type_drc_params->frame_size; i++) {
1056 tmp = 0.0f;
1057 for (j = 0; j < num_channels; j++) {
1058 if (!level_estim_ch_weight[j]) continue;
1059 tmp =
1060 max(tmp, (FLOAT32)fabs(loudness_normalization_gain *
1061 (level_estim_ch_weight[j]) * (samples[j][i])));
1062 }
1063
1064 for (j = attack_time_samples; j > 0; j--) {
1065 max_buf[j] = max_buf[j - 1];
1066 }
1067 max_buf[0] = tmp;
1068 sectionMaximum = tmp;
1069 for (j = 1; j < (attack_time_samples + 1); j++) {
1070 if (max_buf[j] > sectionMaximum) sectionMaximum = max_buf[j];
1071 }
1072 maximum = sectionMaximum;
1073
1074 if (maximum > limit_threshold) {
1075 gain = limit_threshold / maximum;
1076 } else {
1077 gain = 1;
1078 }
1079
1080 if (gain < pre_smoothed_gain) {
1081 gain_modified =
1082 min(gain_modified,
1083 (gain - 0.1f * (FLOAT32)pre_smoothed_gain) * 1.11111111f);
1084 } else {
1085 gain_modified = gain;
1086 }
1087
1088 if (gain_modified < pre_smoothed_gain) {
1089 pre_smoothed_gain =
1090 attack_constant * (pre_smoothed_gain - gain_modified) + gain_modified;
1091 pre_smoothed_gain = max(pre_smoothed_gain, gain);
1092 } else {
1093 pre_smoothed_gain =
1094 release_constant * (pre_smoothed_gain - gain_modified) +
1095 gain_modified;
1096 }
1097
1098 gain = (FLOAT32)pre_smoothed_gain;
1099
1100 lpcm_gains[i] = gain;
1101 }
1102
1103 pstr_parametric_lim_type_drc_params->cor = gain_modified;
1104 pstr_parametric_lim_type_drc_params->smooth_state_0 = pre_smoothed_gain;
1105 return 0;
1106 }
1107