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 <string.h>
21 #include "ixheaacd_sbr_common.h"
22 #include <ixheaacd_type_def.h>
23
24 #include "ixheaacd_constants.h"
25 #include <ixheaacd_basic_ops32.h>
26 #include <ixheaacd_basic_ops16.h>
27 #include <ixheaacd_basic_ops40.h>
28 #include "ixheaacd_basic_ops.h"
29 #include "ixheaacd_defines.h"
30
31 #include "ixheaacd_intrinsics.h"
32 #include "ixheaacd_sbr_const.h"
33 #include <ixheaacd_basic_op.h>
34 #include "ixheaacd_defines.h"
35 #include "ixheaacd_bitbuffer.h"
36 #include "ixheaacd_pns.h"
37
38 #include <ixheaacd_aac_rom.h>
39 #include "ixheaacd_pulsedata.h"
40
41 #include "ixheaacd_drc_data_struct.h"
42 #include "ixheaacd_lt_predict.h"
43 #include "ixheaacd_channelinfo.h"
44 #include "ixheaacd_drc_dec.h"
45
46 #include "ixheaacd_sbrdecoder.h"
47
48 #include "ixheaacd_sbrdecsettings.h"
49 #include "ixheaacd_sbr_scale.h"
50 #include "ixheaacd_lpp_tran.h"
51 #include "ixheaacd_env_extr_part.h"
52 #include <ixheaacd_sbr_rom.h>
53 #include "ixheaacd_hybrid.h"
54 #include "ixheaacd_ps_dec.h"
55 #include "ixheaacd_ps_bitdec.h"
56 #include "ixheaacd_env_extr.h"
57 #include "ixheaacd_common_rom.h"
58 #include "ixheaacd_freq_sca.h"
59
60 #include "ixheaacd_qmf_dec.h"
61
62 #include "ixheaacd_env_calc.h"
63
64 #include "ixheaacd_pvc_dec.h"
65 #include "ixheaacd_sbr_dec.h"
66 #include "ixheaacd_env_dec.h"
67 #include "ixheaacd_basic_funcs.h"
68 #include "ixheaacd_sbr_crc.h"
69
70 #include "ixheaacd_audioobjtypes.h"
71
ixheaacd_downmix_to_monosbr(WORD16 * core_sample_buf,WORD32 ch_fac)72 VOID ixheaacd_downmix_to_monosbr(WORD16 *core_sample_buf, WORD32 ch_fac) {
73 WORD32 i;
74 WORD16 *ptr1 = &core_sample_buf[0];
75 WORD16 *ptr2 = &core_sample_buf[1];
76
77 for (i = MAX_FRAME_SIZE - 1; i >= 0; i--) {
78 *ptr1 = ((*ptr1 >> 1) + (*ptr2 >> 1));
79
80 ptr1 += ch_fac;
81 ptr2 += ch_fac;
82 }
83 }
84
ixheaacd_sbr_dec_reset(ia_sbr_dec_struct * ptr_sbr_dec,ia_sbr_header_data_struct * ptr_header_data,FLAG low_pow_flag,ixheaacd_misc_tables * pstr_common_tables,WORD32 pitch_in_bins,WORD32 audio_object_type)85 static WORD32 ixheaacd_sbr_dec_reset(ia_sbr_dec_struct *ptr_sbr_dec,
86 ia_sbr_header_data_struct *ptr_header_data,
87 FLAG low_pow_flag,
88 ixheaacd_misc_tables *pstr_common_tables,
89 WORD32 pitch_in_bins,
90 WORD32 audio_object_type) {
91 WORD32 old_lsb, new_lsb;
92 WORD32 l;
93 WORD32 err = 0;
94 WORD32 num_time_slots = ptr_sbr_dec->str_codec_qmf_bank.num_time_slots;
95 WORD32 upsample_ratio_idx = ptr_header_data->sbr_ratio_idx;
96 WORD32 op_delay = 6 + SBR_HF_ADJ_OFFSET;
97 WORD32 hbe_flag = ptr_header_data->hbe_flag;
98 WORD32 usac_flag = ptr_header_data->usac_flag;
99
100 if (ptr_header_data->is_usf_4) {
101 op_delay = op_delay + 6;
102 }
103
104 ixheaacd_reset_sbrenvelope_calc(&ptr_sbr_dec->str_sbr_calc_env);
105
106 new_lsb = ptr_header_data->pstr_freq_band_data->sub_band_start;
107 ptr_sbr_dec->str_synthesis_qmf_bank.lsb = new_lsb;
108 ptr_sbr_dec->str_synthesis_qmf_bank.usb =
109 ptr_header_data->pstr_freq_band_data->sub_band_end;
110
111 old_lsb = ptr_sbr_dec->str_synthesis_qmf_bank.lsb;
112 ptr_sbr_dec->str_codec_qmf_bank.lsb = 0;
113 ptr_sbr_dec->str_codec_qmf_bank.usb = old_lsb;
114
115 {
116 WORD32 *plpc_filt_states_real =
117 &ptr_sbr_dec->str_hf_generator.lpc_filt_states_real[0][old_lsb];
118 WORD32 *plpc_filt_states_real_1 =
119 &ptr_sbr_dec->str_hf_generator.lpc_filt_states_real[1][old_lsb];
120
121 WORD32 *plpc_filt_states_imag =
122 &ptr_sbr_dec->str_hf_generator.lpc_filt_states_imag[0][old_lsb];
123 WORD32 *plpc_filt_states_imag_1 =
124 &ptr_sbr_dec->str_hf_generator.lpc_filt_states_imag[1][old_lsb];
125
126 for (l = new_lsb - old_lsb - 1; l >= 0; l--) {
127 *plpc_filt_states_real++ = *plpc_filt_states_real_1++ = 0L;
128
129 if (!low_pow_flag) {
130 *plpc_filt_states_imag++ = *plpc_filt_states_imag_1++ = 0L;
131 }
132 }
133 }
134
135 if (usac_flag) {
136 WORD32 start_band;
137 WORD32 stop_band;
138 WORD32 start_slot = SBR_HF_ADJ_OFFSET;
139 WORD32 k;
140
141 start_band = ptr_header_data->pstr_freq_band_data->qmf_sb_prev;
142 stop_band = ptr_header_data->pstr_freq_band_data->sub_band_start;
143 if (!hbe_flag) {
144 for (l = 0; l < SBR_HF_ADJ_OFFSET; l++) {
145 for (k = start_band; k < stop_band; k++) {
146 ptr_sbr_dec->qmf_buf_real[l][k] = 0.0;
147 ptr_sbr_dec->qmf_buf_imag[l][k] = 0.0;
148 }
149 }
150 for (l = start_slot; l < op_delay; l++) {
151 for (k = start_band; k < stop_band; k++) {
152 ptr_sbr_dec->qmf_buf_real[l][k] = 0.0;
153 ptr_sbr_dec->qmf_buf_imag[l][k] = 0.0;
154 }
155 }
156 }
157 if (hbe_flag && ptr_sbr_dec->p_hbe_txposer != NULL) {
158 WORD32 k, i;
159 WORD32 err = ixheaacd_qmf_hbe_data_reinit(
160 ptr_sbr_dec->p_hbe_txposer,
161 ptr_header_data->pstr_freq_band_data->freq_band_table,
162 ptr_header_data->pstr_freq_band_data->num_sf_bands,
163 ptr_header_data->is_usf_4);
164 if (err) return err;
165
166 for (k = 0; k < 2; k++) {
167 if (!((upsample_ratio_idx == SBR_UPSAMPLE_IDX_4_1) && (k == 0))) {
168 WORD32 xpos_delay = num_time_slots * k;
169 if (upsample_ratio_idx == SBR_UPSAMPLE_IDX_4_1) {
170 xpos_delay = num_time_slots * k - 32;
171 }
172
173 for (i = 0; i < 8; i++) {
174 memmove(ptr_sbr_dec->ph_vocod_qmf_real[i],
175 ptr_sbr_dec->ph_vocod_qmf_real[num_time_slots + i],
176 64 * sizeof(FLOAT32));
177 memmove(ptr_sbr_dec->ph_vocod_qmf_imag[i],
178 ptr_sbr_dec->ph_vocod_qmf_imag[num_time_slots + i],
179 64 * sizeof(FLOAT32));
180 }
181
182 err = ixheaacd_qmf_hbe_apply(
183 ptr_sbr_dec->p_hbe_txposer,
184 ptr_sbr_dec->qmf_buf_real + op_delay + xpos_delay,
185 ptr_sbr_dec->qmf_buf_imag + op_delay + xpos_delay, num_time_slots,
186 ptr_sbr_dec->ph_vocod_qmf_real + op_delay,
187 ptr_sbr_dec->ph_vocod_qmf_imag + op_delay, pitch_in_bins);
188 if (err) return err;
189
190 if (upsample_ratio_idx == SBR_UPSAMPLE_IDX_4_1) {
191 ixheaacd_hbe_repl_spec(&ptr_sbr_dec->p_hbe_txposer->x_over_qmf[0],
192 ptr_sbr_dec->ph_vocod_qmf_real + op_delay,
193 ptr_sbr_dec->ph_vocod_qmf_imag + op_delay,
194 num_time_slots,
195 ptr_sbr_dec->p_hbe_txposer->max_stretch);
196 }
197 }
198 }
199 }
200 }
201
202 if (!usac_flag) {
203 err |= ixheaacd_reset_hf_generator(&ptr_sbr_dec->str_hf_generator,
204 ptr_header_data, audio_object_type);
205
206 err |= ixheaacd_derive_lim_band_tbl(
207 ptr_header_data,
208 ptr_sbr_dec->str_hf_generator.pstr_settings->str_patch_param,
209 ptr_sbr_dec->str_hf_generator.pstr_settings->num_patches,
210 pstr_common_tables);
211 }
212
213 return err;
214 }
215
ixheaacd_prepare_upsamp(ia_sbr_header_data_struct ** ptr_header_data,ia_sbr_channel_struct * pstr_sbr_channel[2],WORD32 num_channels)216 WORD32 ixheaacd_prepare_upsamp(ia_sbr_header_data_struct **ptr_header_data,
217 ia_sbr_channel_struct *pstr_sbr_channel[2],
218 WORD32 num_channels) {
219 WORD16 err = 0;
220 WORD32 lr;
221 ia_sbr_qmf_filter_bank_struct *sbr_qmf_bank;
222
223 for (lr = 0; lr < num_channels; lr++) {
224 ptr_header_data[lr]->pstr_freq_band_data->sub_band_start =
225 NO_ANALYSIS_CHANNELS;
226 ptr_header_data[lr]->pstr_freq_band_data->sub_band_end =
227 NO_SYNTHESIS_CHANNELS;
228
229 sbr_qmf_bank = &pstr_sbr_channel[lr]->str_sbr_dec.str_synthesis_qmf_bank;
230 sbr_qmf_bank->lsb = NO_ANALYSIS_CHANNELS;
231 sbr_qmf_bank->usb = NO_SYNTHESIS_CHANNELS;
232
233 sbr_qmf_bank = &pstr_sbr_channel[lr]->str_sbr_dec.str_codec_qmf_bank;
234 sbr_qmf_bank->lsb = 0;
235 sbr_qmf_bank->usb = NO_ANALYSIS_CHANNELS;
236 ptr_header_data[lr]->sync_state = UPSAMPLING;
237 }
238 return err;
239 }
240
ixheaacd_applysbr(ia_handle_sbr_dec_inst_struct self,ia_aac_dec_sbr_bitstream_struct * p_sbr_bit_stream,WORD16 * core_sample_buf,WORD16 * codec_num_channels,FLAG frame_status,FLAG down_samp_flag,FLAG down_mix_flag,ia_sbr_scr_struct * sbr_scratch_struct,WORD32 ps_enable,WORD32 ch_fac,WORD32 slot_element,ia_bit_buf_struct * it_bit_buff,ia_drc_dec_struct * pstr_drc_dec,WORD eld_sbr_flag,WORD32 audio_object_type)241 WORD16 ixheaacd_applysbr(ia_handle_sbr_dec_inst_struct self,
242 ia_aac_dec_sbr_bitstream_struct *p_sbr_bit_stream,
243 WORD16 *core_sample_buf, WORD16 *codec_num_channels,
244 FLAG frame_status, FLAG down_samp_flag,
245 FLAG down_mix_flag,
246 ia_sbr_scr_struct *sbr_scratch_struct,
247 WORD32 ps_enable, WORD32 ch_fac, WORD32 slot_element,
248 ia_bit_buf_struct *it_bit_buff,
249 ia_drc_dec_struct *pstr_drc_dec, WORD eld_sbr_flag,
250 WORD32 audio_object_type) {
251 WORD32 k;
252 FLAG prev_ps_flag = 0;
253 FLAG ps_flag = 0;
254 FLAG stereo = 0;
255 FLAG low_pow_flag = 0;
256 FLAG header_flag = 1;
257 FLAG dual_mono = 0;
258 WORD32 err = 0;
259 WORD32 num_channels = *codec_num_channels;
260 FLAG prev_stereo;
261 WORD32 ele_channels = 0;
262 WORD32 num_elements = p_sbr_bit_stream->no_elements;
263 WORD32 usac_flag = self->aot_usac_flag;
264
265 ia_sbr_channel_struct *pstr_sbr_channel[2];
266 ia_sbr_header_data_struct *ptr_header_data[MAXNRSBRCHANNELS];
267
268 WORD32 initial_sync_state;
269
270 ia_sbr_header_data_struct *ptr_sbr_dflt_header =
271 (ia_sbr_header_data_struct *)(&self->str_sbr_dflt_header);
272
273 ia_sbr_frame_info_data_struct *ptr_frame_data[2];
274
275 for (k = 0; k < 2; k++) {
276 ptr_frame_data[k] = (ia_sbr_frame_info_data_struct *)self->frame_buffer[k];
277
278 pstr_sbr_channel[k] = self->pstr_sbr_channel[k];
279
280 ptr_header_data[k] = self->pstr_sbr_header[k];
281
282 if (audio_object_type == AOT_ER_AAC_ELD) {
283 ptr_frame_data[k]->eld_sbr_flag = eld_sbr_flag;
284 ptr_frame_data[k]->num_time_slots = ptr_header_data[0]->num_time_slots;
285 }
286
287 ptr_frame_data[k]->usac_independency_flag = self->usac_independency_flag;
288 ptr_frame_data[k]->mps_sbr_flag = (self->stereo_config_idx == 3) ? 1 : 0;
289 ptr_frame_data[k]->stereo_config_idx = self->stereo_config_idx;
290 ptr_frame_data[k]->inter_tes_flag = self->inter_tes_flag;
291 ptr_frame_data[k]->sbr_mode = self->sbr_mode;
292
293 if (!usac_flag) {
294 ptr_frame_data[k]->usac_independency_flag = 0;
295 ptr_frame_data[k]->mps_sbr_flag = 0;
296 ptr_frame_data[k]->stereo_config_idx = -1;
297 ptr_frame_data[k]->inter_tes_flag = 0;
298 ptr_frame_data[k]->sbr_mode = ORIG_SBR;
299 }
300 }
301
302 for (k = 0; k < *codec_num_channels; k++) {
303 ptr_header_data[k]->usac_flag = self->aot_usac_flag;
304
305 ptr_header_data[k]->usac_independency_flag = self->usac_independency_flag;
306 ptr_header_data[k]->hbe_flag = self->hbe_flag;
307 ptr_header_data[k]->pvc_flag = self->pvc_flag;
308
309 if (!usac_flag) {
310 ptr_header_data[k]->usac_independency_flag = 0;
311 ptr_header_data[k]->hbe_flag = 0;
312 ptr_header_data[k]->pvc_flag = 0;
313 }
314 }
315
316 initial_sync_state = ptr_header_data[0]->sync_state;
317
318 low_pow_flag = !usac_flag;
319 self->pstr_sbr_tables->sbr_rand_ph =
320 self->pstr_sbr_tables->env_calc_tables_ptr->sbr_rand_ph;
321
322 if (ps_enable) {
323 if (num_channels == 1) {
324 low_pow_flag = 0;
325 }
326 }
327
328 if (audio_object_type == AOT_ER_AAC_ELD) {
329 low_pow_flag = 0;
330 }
331
332 prev_stereo = (ptr_header_data[0]->channel_mode == SBR_STEREO);
333
334 if (ps_enable) prev_ps_flag = (ptr_header_data[0]->channel_mode == PS_STEREO);
335
336 ptr_header_data[0]->err_flag_prev = ptr_header_data[0]->err_flag;
337
338 if (p_sbr_bit_stream->no_elements == 0) {
339 frame_status = 0;
340 ptr_header_data[0]->sync_state = UPSAMPLING;
341 if (num_channels == 2) ptr_header_data[1]->sync_state = UPSAMPLING;
342 }
343
344 if ((usac_flag)) {
345 if ((p_sbr_bit_stream->no_elements) &&
346 (p_sbr_bit_stream->str_sbr_ele->size_payload > 0)) {
347 num_elements = p_sbr_bit_stream->no_elements;
348 } else {
349 num_elements = 0;
350 }
351 }
352
353 for (k = 0; k < num_elements; k++) {
354 struct ia_bit_buf_struct local_bit_buf;
355 ia_sbr_element_stream_struct *ptr_bit_str_ele =
356 &p_sbr_bit_stream->str_sbr_ele[k];
357 ele_channels =
358 (p_sbr_bit_stream->str_sbr_ele[0].sbr_ele_id == SBR_ID_CPE) ? 2 : 1;
359
360 switch (ptr_bit_str_ele->sbr_ele_id) {
361 case SBR_ID_SCE:
362 case SBR_ID_CCE:
363 if (num_channels == 2) {
364 dual_mono = 1;
365 }
366 stereo = 0;
367 break;
368 case SBR_ID_CPE:
369 stereo = 1;
370 ptr_header_data[1] = ptr_header_data[0];
371
372 memcpy(self->pstr_sbr_header[1], self->pstr_sbr_header[0],
373 sizeof(ia_sbr_header_data_struct));
374 break;
375 default:
376 frame_status = 0;
377 }
378
379 if (frame_status) {
380 if (!usac_flag) {
381 ixheaacd_create_init_bit_buf(&local_bit_buf,
382 (UWORD8 *)ptr_bit_str_ele->ptr_sbr_data,
383 ptr_bit_str_ele->size_payload);
384
385 it_bit_buff = &local_bit_buf;
386 if (audio_object_type == AOT_ER_AAC_ELD) {
387 if (eld_sbr_flag != 1) {
388 ixheaacd_read_bits_buf(&local_bit_buf, LEN_NIBBLE);
389 }
390 } else {
391 ixheaacd_read_bits_buf(&local_bit_buf, LEN_NIBBLE);
392 }
393 }
394 if (ptr_bit_str_ele->extension_type == SBR_EXTENSION_CRC) {
395 WORD32 crc_bits = 0;
396 WORD32 crc_check_flag = 0;
397 crc_check_flag = 1;
398 crc_bits = (((ptr_bit_str_ele->size_payload - 1) << 3) +
399 (4 - SBR_CYC_REDCY_CHK_BITS));
400
401 if (crc_bits < 0) {
402 crc_check_flag = 0;
403 frame_status = 0;
404 }
405 if (crc_check_flag)
406 frame_status = ixheaacd_sbr_crccheck(it_bit_buff, crc_bits);
407 }
408
409 if (!usac_flag) header_flag = ixheaacd_read_bits_buf(it_bit_buff, 1);
410
411 if (audio_object_type != AOT_ER_AAC_ELD) {
412 if (header_flag) {
413 header_flag = ixheaacd_sbr_read_header_data(
414 ptr_header_data[k], it_bit_buff, stereo, ptr_sbr_dflt_header);
415 if (usac_flag) {
416 if ((self->ptr_pvc_data_str->prev_pvc_mode == 0) &&
417 (ptr_header_data[k]->pvc_mode != 0)) {
418 self->ptr_pvc_data_str->prev_pvc_id = 0;
419 }
420 self->ptr_pvc_data_str->prev_pvc_mode =
421 ptr_header_data[k]->pvc_mode;
422 if (ptr_header_data[k]->pvc_mode == 0) {
423 ptr_frame_data[k]->sbr_mode = ORIG_SBR;
424 } else {
425 ptr_frame_data[k]->sbr_mode = PVC_SBR;
426 }
427 }
428 if (header_flag == SBR_RESET) {
429 err = ixheaacd_calc_frq_bnd_tbls(ptr_header_data[k],
430
431 self->pstr_common_tables);
432 if (!err) {
433 WORD32 lr;
434 WORD32 lr1 = ps_enable ? 2 : num_channels;
435 for (lr = 0; lr < lr1; lr++) {
436 ptr_frame_data[lr]->reset_flag = 1;
437
438 err |= ixheaacd_sbr_dec_reset(
439 &(pstr_sbr_channel[lr]->str_sbr_dec), ptr_header_data[k],
440 low_pow_flag, self->pstr_common_tables,
441 ptr_frame_data[k]->pitch_in_bins, audio_object_type);
442 if (err < 0) return err;
443 }
444 }
445
446 if (err == 0) {
447 ptr_header_data[k]->sync_state = SBR_ACTIVE;
448 }
449 }
450 }
451 } else {
452 if (header_flag) {
453 header_flag = ixheaacd_sbr_read_header_data(
454 ptr_header_data[k], it_bit_buff, stereo, ptr_sbr_dflt_header);
455 if (usac_flag) {
456 if ((self->ptr_pvc_data_str->prev_pvc_mode == 0) &&
457 (ptr_header_data[k]->pvc_mode != 0)) {
458 self->ptr_pvc_data_str->prev_pvc_id = 0;
459 }
460 self->ptr_pvc_data_str->prev_pvc_mode =
461 ptr_header_data[k]->pvc_mode;
462 if (ptr_header_data[k]->pvc_mode == 0) {
463 ptr_frame_data[k]->sbr_mode = ORIG_SBR;
464 } else {
465 ptr_frame_data[k]->sbr_mode = PVC_SBR;
466 }
467 }
468
469 if (header_flag == SBR_RESET) {
470 err = ixheaacd_calc_frq_bnd_tbls(ptr_header_data[k],
471
472 self->pstr_common_tables);
473 if (err) {
474 return err;
475 }
476 }
477 }
478
479 {
480 WORD32 lr;
481 WORD32 lr1 = ps_enable ? 2 : num_channels;
482 for (lr = 0; lr < lr1; lr++) {
483 ptr_frame_data[lr]->reset_flag = 1;
484 if (ptr_header_data[k]->status) {
485 err |= ixheaacd_sbr_dec_reset(
486 &(pstr_sbr_channel[lr]->str_sbr_dec), ptr_header_data[k],
487 low_pow_flag, self->pstr_common_tables,
488 ptr_frame_data[k]->pitch_in_bins, audio_object_type);
489 if (err < 0) return err;
490 }
491 }
492 ptr_header_data[k]->status = 0;
493 }
494
495 if (err == 0) {
496 ptr_header_data[k]->sync_state = SBR_ACTIVE;
497 }
498 }
499 }
500
501 if (err || (ptr_header_data[k]->sync_state == SBR_NOT_INITIALIZED)) {
502 WORD32 lr1 = ps_enable ? 2 : num_channels;
503 ixheaacd_prepare_upsamp(ptr_header_data, pstr_sbr_channel, lr1);
504 }
505
506 if (frame_status && (ptr_header_data[k]->sync_state == SBR_ACTIVE)) {
507 if (stereo) {
508 frame_status = ixheaacd_sbr_read_cpe(ptr_header_data[0], ptr_frame_data,
509 it_bit_buff, self->pstr_sbr_tables,
510 audio_object_type);
511 } else {
512 if (ps_enable) {
513 if (down_mix_flag) {
514 self->pstr_ps_stereo_dec->force_mono = 1;
515 } else {
516 self->pstr_ps_stereo_dec->force_mono = 0;
517 }
518 } else {
519 self->pstr_ps_stereo_dec = 0;
520 }
521 if (ptr_frame_data[k]->sbr_mode == ORIG_SBR) {
522 frame_status = ixheaacd_sbr_read_sce(
523 ptr_header_data[k], ptr_frame_data[k], self->pstr_ps_stereo_dec,
524 it_bit_buff, self->pstr_sbr_tables, audio_object_type);
525 } else if (ptr_frame_data[k]->sbr_mode == PVC_SBR) {
526 frame_status = ixheaacd_sbr_read_pvc_sce(
527 ptr_frame_data[k], it_bit_buff, 0, self->ptr_pvc_data_str,
528 self->pstr_sbr_tables, ptr_header_data[k]);
529 if (frame_status < 0) return frame_status;
530 }
531 }
532 if (audio_object_type != AOT_ER_AAC_ELD) {
533 WORD32 total_bits_read;
534 total_bits_read = ixheaacd_no_bits_read(it_bit_buff);
535 if (total_bits_read > (ptr_bit_str_ele->size_payload << 3) ||
536 total_bits_read < ((ptr_bit_str_ele->size_payload << 3) - 8)) {
537 frame_status = 0;
538 }
539 }
540 }
541 }
542
543 if (!usac_flag) {
544 if (!frame_status || (ptr_header_data[0]->sync_state != SBR_ACTIVE) ||
545 ptr_header_data[0]->err_flag) {
546 ptr_header_data[0]->err_flag = 1;
547 stereo = (num_channels == 2) ? 1 : 0;
548 if (ptr_header_data[0]->channel_mode == 0) {
549 ptr_header_data[0]->channel_mode = stereo ? SBR_STEREO : SBR_MONO;
550 }
551 }
552
553 if (!(stereo || dual_mono)) {
554 ptr_frame_data[0]->coupling_mode = COUPLING_OFF;
555 ptr_frame_data[1]->coupling_mode = COUPLING_OFF;
556 }
557
558 if (ptr_header_data[0]->sync_state == SBR_NOT_INITIALIZED) {
559 WORD32 lr1 = ps_enable ? 2 : num_channels;
560 ixheaacd_prepare_upsamp(ptr_header_data, pstr_sbr_channel, lr1);
561 }
562 }
563
564 if (ptr_header_data[0]->sync_state == SBR_ACTIVE) {
565 if (ptr_frame_data[0]->sbr_mode == PVC_SBR) {
566 ixheaacd_dec_sbrdata_for_pvc(ptr_header_data[0], ptr_frame_data[0],
567 pstr_sbr_channel[0]->pstr_prev_frame_data);
568 } else if (ptr_frame_data[0]->sbr_mode == ORIG_SBR) {
569 ixheaacd_dec_sbrdata(
570 ptr_header_data[0], ptr_header_data[1], ptr_frame_data[0],
571 pstr_sbr_channel[0]->pstr_prev_frame_data,
572 (stereo || dual_mono) ? ptr_frame_data[1] : NULL,
573 (stereo || dual_mono) ? pstr_sbr_channel[1]->pstr_prev_frame_data
574 : NULL,
575 self->pstr_common_tables);
576 }
577
578 if (ptr_header_data[0]->channel_mode == PS_STEREO &&
579 (audio_object_type != AOT_ER_AAC_ELD &&
580 audio_object_type != AOT_ER_AAC_LD)) {
581 ixheaacd_decode_ps_data(self->pstr_ps_stereo_dec);
582 ps_flag = 1;
583 self->ps_present = ps_flag;
584 }
585
586 ptr_frame_data[0]->max_qmf_subband_aac =
587 ptr_header_data[0]->pstr_freq_band_data->sub_band_start;
588 if (stereo) {
589 ptr_frame_data[1]->max_qmf_subband_aac =
590 ptr_header_data[1]->pstr_freq_band_data->sub_band_start;
591 }
592 }
593 if (audio_object_type != AOT_ER_AAC_ELD) {
594 if ((initial_sync_state == SBR_NOT_INITIALIZED) &&
595 ptr_header_data[0]->err_flag) {
596 ptr_header_data[0]->sync_state = SBR_NOT_INITIALIZED;
597 }
598 } else {
599 ptr_header_data[0]->sync_state = SBR_ACTIVE;
600 }
601
602 if ((num_channels == 2) && !(stereo || dual_mono)) {
603 ixheaacd_downmix_to_monosbr(&core_sample_buf[slot_element], ch_fac);
604 }
605
606 if ((!prev_stereo && !prev_ps_flag) && (ps_flag)) {
607 WORD32 copy_size;
608 if (down_samp_flag)
609 copy_size = QMF_FILTER_STATE_SYN_SIZE_DOWN_SAMPLED;
610 else
611 copy_size = QMF_FILTER_STATE_SYN_SIZE;
612
613 memcpy(
614 pstr_sbr_channel[1]->str_sbr_dec.str_synthesis_qmf_bank.filter_states,
615 pstr_sbr_channel[0]->str_sbr_dec.str_synthesis_qmf_bank.filter_states,
616 copy_size * sizeof(WORD16));
617
618 pstr_sbr_channel[1]->str_sbr_dec.str_sbr_scale_fact.st_syn_scale =
619 pstr_sbr_channel[0]->str_sbr_dec.str_sbr_scale_fact.st_syn_scale;
620 }
621
622 if ((!prev_stereo && stereo && (num_channels == 2)) &&
623 (audio_object_type != AOT_ER_AAC_ELD)) {
624 WORD32 copy_size;
625 if (down_samp_flag)
626 copy_size = QMF_FILTER_STATE_SYN_SIZE_DOWN_SAMPLED;
627 else
628 copy_size = QMF_FILTER_STATE_SYN_SIZE;
629
630 memcpy(
631 pstr_sbr_channel[1]->str_sbr_dec.str_synthesis_qmf_bank.filter_states,
632 pstr_sbr_channel[0]->str_sbr_dec.str_synthesis_qmf_bank.filter_states,
633 copy_size * sizeof(WORD16));
634
635 pstr_sbr_channel[1]->str_sbr_dec.str_sbr_scale_fact.st_syn_scale =
636 pstr_sbr_channel[0]->str_sbr_dec.str_sbr_scale_fact.st_syn_scale;
637
638 memcpy(
639 pstr_sbr_channel[1]->str_sbr_dec.str_codec_qmf_bank.anal_filter_states,
640 pstr_sbr_channel[0]->str_sbr_dec.str_codec_qmf_bank.anal_filter_states,
641 QMF_FILTER_STATE_ANA_SIZE * sizeof(WORD16));
642
643 pstr_sbr_channel[1]->str_sbr_dec.str_sbr_scale_fact.st_lb_scale =
644 pstr_sbr_channel[0]->str_sbr_dec.str_sbr_scale_fact.st_lb_scale;
645
646 memcpy(pstr_sbr_channel[1]->str_sbr_dec.ptr_sbr_overlap_buf,
647 pstr_sbr_channel[0]->str_sbr_dec.ptr_sbr_overlap_buf,
648 MAX_OV_COLS * NO_SYNTHESIS_CHANNELS * sizeof(WORD32));
649
650 pstr_sbr_channel[1]->str_sbr_dec.str_sbr_scale_fact.ov_lb_scale =
651 pstr_sbr_channel[0]->str_sbr_dec.str_sbr_scale_fact.ov_lb_scale;
652 pstr_sbr_channel[1]->str_sbr_dec.str_sbr_scale_fact.ov_hb_scale =
653 pstr_sbr_channel[0]->str_sbr_dec.str_sbr_scale_fact.ov_hb_scale;
654 }
655 pstr_sbr_channel[0]->str_sbr_dec.time_sample_buf = self->time_sample_buf[0];
656 if (pstr_drc_dec == NULL) {
657 WORD32 err_code = 0;
658 err_code = ixheaacd_sbr_dec(
659 &pstr_sbr_channel[0]->str_sbr_dec, core_sample_buf + slot_element,
660 ptr_header_data[0], ptr_frame_data[0],
661 pstr_sbr_channel[0]->pstr_prev_frame_data, self->pstr_ps_stereo_dec,
662 &pstr_sbr_channel[1]->str_sbr_dec.str_synthesis_qmf_bank,
663 &pstr_sbr_channel[1]->str_sbr_dec.str_sbr_scale_fact,
664 (ptr_header_data[0]->sync_state == SBR_ACTIVE), low_pow_flag,
665 sbr_scratch_struct->ptr_work_buf_core, self->pstr_sbr_tables,
666 self->pstr_common_tables, ch_fac, self->ptr_pvc_data_str, 0, NULL,
667 audio_object_type);
668 if (err_code) return err_code;
669 } else {
670 WORD32 err_code = 0;
671 err_code = ixheaacd_sbr_dec(
672 &pstr_sbr_channel[0]->str_sbr_dec, core_sample_buf + slot_element,
673 ptr_header_data[0], ptr_frame_data[0],
674 pstr_sbr_channel[0]->pstr_prev_frame_data, self->pstr_ps_stereo_dec,
675 &pstr_sbr_channel[1]->str_sbr_dec.str_synthesis_qmf_bank,
676 &pstr_sbr_channel[1]->str_sbr_dec.str_sbr_scale_fact,
677 (ptr_header_data[0]->sync_state == SBR_ACTIVE), low_pow_flag,
678 sbr_scratch_struct->ptr_work_buf_core, self->pstr_sbr_tables,
679 self->pstr_common_tables, ch_fac, self->ptr_pvc_data_str,
680 pstr_drc_dec->drc_on,
681 pstr_drc_dec->str_drc_channel_data[0].drc_factors_sbr,
682 audio_object_type);
683 if (err_code) return err_code;
684 }
685
686 if (!down_mix_flag && (stereo || dual_mono) && (num_channels == 2)) {
687 pstr_sbr_channel[1]->str_sbr_dec.time_sample_buf = self->time_sample_buf[1];
688
689 if (ele_channels == 1 && usac_flag) {
690 WORD32 err_code = ixheaacd_esbr_dec(
691 &pstr_sbr_channel[1]->str_sbr_dec, ptr_header_data[1],
692 ptr_frame_data[1], (ptr_header_data[1]->sync_state == SBR_ACTIVE),
693 low_pow_flag, self->pstr_sbr_tables, ch_fac);
694 if (err_code) return err_code;
695 } else {
696 if (pstr_drc_dec == NULL) {
697 WORD32 err_code = ixheaacd_sbr_dec(
698 &pstr_sbr_channel[1]->str_sbr_dec,
699 core_sample_buf + slot_element + 1, ptr_header_data[1],
700 ptr_frame_data[1], pstr_sbr_channel[1]->pstr_prev_frame_data, NULL,
701 NULL, NULL, (ptr_header_data[1]->sync_state == SBR_ACTIVE),
702 low_pow_flag, sbr_scratch_struct->ptr_work_buf_core,
703 self->pstr_sbr_tables, self->pstr_common_tables, ch_fac,
704 self->ptr_pvc_data_str, 0, NULL, audio_object_type);
705 if (err_code) return err_code;
706 } else {
707 WORD32 err_code = ixheaacd_sbr_dec(
708 &pstr_sbr_channel[1]->str_sbr_dec,
709 core_sample_buf + slot_element + 1, ptr_header_data[1],
710 ptr_frame_data[1], pstr_sbr_channel[1]->pstr_prev_frame_data, NULL,
711 NULL, NULL, (ptr_header_data[1]->sync_state == SBR_ACTIVE),
712 low_pow_flag, sbr_scratch_struct->ptr_work_buf_core,
713 self->pstr_sbr_tables, self->pstr_common_tables, ch_fac,
714 self->ptr_pvc_data_str, pstr_drc_dec->drc_on,
715 pstr_drc_dec->str_drc_channel_data[1].drc_factors_sbr,
716 audio_object_type);
717 if (err_code) return err_code;
718 }
719 }
720
721 } else {
722 if (audio_object_type != AOT_ER_AAC_ELD &&
723 audio_object_type != AOT_ER_AAC_LD)
724
725 {
726 if (sub_d((WORD16)ptr_header_data[0]->channel_mode, PS_STEREO) == 0) {
727 num_channels = 2;
728 }
729 }
730 }
731 *codec_num_channels = num_channels;
732 self->sbr_mode = ptr_frame_data[0]->sbr_mode;
733
734 if (pstr_drc_dec != NULL) {
735 WORD32 i, j;
736 for (i = 0; i < *codec_num_channels; i++) {
737 for (j = 0; j < 32; j++) {
738 memcpy(pstr_drc_dec->str_drc_channel_data[i].drc_factors_sbr[j],
739 pstr_drc_dec->str_drc_channel_data[i].drc_factors_sbr[j + 32],
740 64 * sizeof(WORD32));
741 }
742 }
743 }
744
745 return SBRDEC_OK;
746 }
747