1 /******************************************************************************
2 *
3 * Copyright (C) 2012 Ittiam Systems Pvt Ltd, Bangalore
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 /**
19 *******************************************************************************
20 * @file
21 * ihevcd_parse_headers.c
22 *
23 * @brief
24 * Contains functions for parsing headers
25 *
26 * @author
27 * Harish
28 *
29 * @par List of Functions:
30 *
31 * @remarks
32 * None
33 *
34 *******************************************************************************
35 */
36
37 /*****************************************************************************/
38 /* File Includes */
39 /*****************************************************************************/
40 #include <stdio.h>
41 #include <stddef.h>
42 #include <stdlib.h>
43 #include <string.h>
44 #include <assert.h>
45
46 #include "ihevc_typedefs.h"
47 #include "iv.h"
48 #include "ivd.h"
49 #include "ihevcd_cxa.h"
50
51 #include "ihevc_defs.h"
52 #include "ihevc_debug.h"
53 #include "ihevc_defs.h"
54 #include "ihevc_structs.h"
55 #include "ihevc_buf_mgr.h"
56 #include "ihevc_dpb_mgr.h"
57 #include "ihevc_macros.h"
58 #include "ihevc_platform_macros.h"
59 #include "ihevc_cabac_tables.h"
60 #include "ihevc_common_tables.h"
61 #include "ihevc_quant_tables.h"
62
63 #include "ihevcd_trace.h"
64 #include "ihevcd_defs.h"
65 #include "ihevcd_function_selector.h"
66 #include "ihevcd_structs.h"
67 #include "ihevcd_error.h"
68 #include "ihevcd_debug.h"
69 #include "ihevcd_nal.h"
70 #include "ihevcd_bitstream.h"
71 #include "ihevcd_parse_headers.h"
72 #include "ihevcd_parse_slice_header.h"
73 #include "ihevcd_ref_list.h"
74
75 mv_buf_t* ihevcd_mv_mgr_get_poc(buf_mgr_t *ps_mv_buf_mgr, UWORD32 abs_poc);
76
77 /**
78 *******************************************************************************
79 *
80 * @brief
81 * Parses VPS operation point
82 *
83 * @par Description
84 * Parses VPS operation point as per section 7.3.5
85 *
86 * @param[out] ps_vps
87 * Pointer to VPS structure
88 *
89 * @param[in] ps_bitstrm
90 * Pointer to bitstream structure
91 *
92 * @param[in] ops_idx
93 * Operating point index
94 *
95 * @returns Error code from IHEVCD_ERROR_T
96 *
97 * @remarks
98 *
99 *******************************************************************************
100 */
ihevcd_operation_point_set(vps_t * ps_vps,bitstrm_t * ps_bitstrm,WORD32 ops_idx)101 IHEVCD_ERROR_T ihevcd_operation_point_set(vps_t *ps_vps, bitstrm_t *ps_bitstrm, WORD32 ops_idx)
102 {
103 WORD32 i;
104 WORD32 value;
105
106 IHEVCD_ERROR_T ret = (IHEVCD_ERROR_T)IHEVCD_SUCCESS;
107 UNUSED(ops_idx);
108 for(i = 0; i <= ps_vps->i1_vps_max_nuh_reserved_zero_layer_id; i++)
109 {
110 BITS_PARSE("list_entry_l0[ i ]", value, ps_bitstrm, 1);
111 //ps_vps->ai1_layer_id_included_flag[ops_idx][i] = value;
112
113 }
114 UNUSED(value);
115
116 return ret;
117 }
118
119 /**
120 *******************************************************************************
121 *
122 * @brief
123 * Parses pic_lismod_t (picture list mod syntax) Section:7.3.8.3 Reference
124 * picture list mod syntax
125 *
126 * @par Description:
127 * Parse pict list mod synt and update pic_lismod_t struct
128 *
129 * @param[in] ps_codec
130 * Pointer to codec context
131 *
132 * @returns Error code from IHEVCD_ERROR_T
133 *
134 * @remarks
135 *
136 *
137 *******************************************************************************
138 */
139
ihevcd_ref_pic_list_modification(bitstrm_t * ps_bitstrm,slice_header_t * ps_slice_hdr,WORD32 num_poc_total_curr)140 WORD32 ihevcd_ref_pic_list_modification(bitstrm_t *ps_bitstrm,
141 slice_header_t *ps_slice_hdr,
142 WORD32 num_poc_total_curr)
143 {
144 WORD32 ret = IHEVCD_SUCCESS;
145 WORD32 value;
146 WORD32 i;
147 rplm_t *ps_rplm;
148 WORD32 num_bits_list_entry;
149
150 ps_rplm = &(ps_slice_hdr->s_rplm);
151
152 /* Calculate Ceil(Log2(num_poc_total_curr)) */
153 {
154 num_bits_list_entry = 32 - CLZ(num_poc_total_curr);
155 /* Check if num_poc_total_curr is power of 2 */
156 if(0 == (num_poc_total_curr & (num_poc_total_curr - 1)))
157 {
158 num_bits_list_entry--;
159 }
160 }
161
162 if(ps_slice_hdr->i1_slice_type == PSLICE || ps_slice_hdr->i1_slice_type == BSLICE)
163 {
164 BITS_PARSE("ref_pic_list_modification_flag_l0", value, ps_bitstrm, 1);
165 ps_rplm->i1_ref_pic_list_modification_flag_l0 = value;
166
167 if(ps_rplm->i1_ref_pic_list_modification_flag_l0)
168 for(i = 0; i < ps_slice_hdr->i1_num_ref_idx_l0_active; i++)
169 {
170 BITS_PARSE("list_entry_l0", value, ps_bitstrm, num_bits_list_entry);
171 ps_rplm->i1_list_entry_l0[i] = value;
172
173 ps_rplm->i1_list_entry_l0[i] = CLIP3(ps_rplm->i1_list_entry_l0[i], 0, num_poc_total_curr - 1);
174 }
175 }
176
177 if(ps_slice_hdr->i1_slice_type == BSLICE)
178 {
179 BITS_PARSE("ref_pic_list_modification_flag_l1", value, ps_bitstrm, 1);
180 ps_rplm->i1_ref_pic_list_modification_flag_l1 = value;
181
182 if(ps_rplm->i1_ref_pic_list_modification_flag_l1)
183 for(i = 0; i < ps_slice_hdr->i1_num_ref_idx_l1_active; i++)
184 {
185 BITS_PARSE("list_entry_l1", value, ps_bitstrm, num_bits_list_entry);
186 ps_rplm->i1_list_entry_l1[i] = value;
187
188 ps_rplm->i1_list_entry_l1[i] = CLIP3(ps_rplm->i1_list_entry_l1[i], 0, num_poc_total_curr - 1);
189 }
190
191 }
192
193 return ret;
194 }
195
196 /**
197 *******************************************************************************
198 *
199 * @brief
200 * Parse Slice Header
201 * slice_header_syntax()
202 *
203 * @par Description:
204 * Parse Slice Header as per Section: 7.3.8
205 *
206 * @param[in] ps_codec
207 * Pointer to codec context
208 *
209 * @returns Error code from IHEVCD_ERROR_T
210 *
211 * @remarks
212 *
213 *
214 *******************************************************************************
215 */
216
ihevcd_parse_slice_header(codec_t * ps_codec,nal_header_t * ps_nal)217 IHEVCD_ERROR_T ihevcd_parse_slice_header(codec_t *ps_codec,
218 nal_header_t *ps_nal)
219 {
220 IHEVCD_ERROR_T ret = (IHEVCD_ERROR_T)IHEVCD_SUCCESS;
221 UWORD32 value;
222 WORD32 i4_value;
223 WORD32 i, j;
224 WORD32 sps_id;
225
226 pps_t *ps_pps;
227 sps_t *ps_sps;
228 slice_header_t *ps_slice_hdr;
229 WORD32 disable_deblocking_filter_flag;
230 bitstrm_t *ps_bitstrm = &ps_codec->s_parse.s_bitstrm;
231 WORD32 idr_pic_flag;
232 WORD32 pps_id;
233 WORD32 first_slice_in_pic_flag;
234 WORD32 no_output_of_prior_pics_flag = 0;
235 WORD8 i1_nal_unit_type = ps_nal->i1_nal_unit_type;
236 WORD32 num_poc_total_curr = 0;
237 UWORD32 slice_address;
238 WORD32 prev_slice_incomplete_flag = 0;
239
240 if(ps_codec->i4_slice_error == 1)
241 return ret;
242
243 idr_pic_flag = (NAL_IDR_W_LP == i1_nal_unit_type) ||
244 (NAL_IDR_N_LP == i1_nal_unit_type);
245
246
247 BITS_PARSE("first_slice_in_pic_flag", first_slice_in_pic_flag, ps_bitstrm, 1);
248 if((NAL_BLA_W_LP <= i1_nal_unit_type) &&
249 (NAL_RSV_RAP_VCL23 >= i1_nal_unit_type))
250 {
251 BITS_PARSE("no_output_of_prior_pics_flag", no_output_of_prior_pics_flag, ps_bitstrm, 1);
252 }
253 UEV_PARSE("pic_parameter_set_id", pps_id, ps_bitstrm);
254 if(pps_id < 0 || pps_id > MAX_PPS_CNT - 2)
255 {
256 return IHEVCD_INVALID_PARAMETER;
257 }
258
259 /* Get the current PPS structure */
260 ps_pps = ps_codec->s_parse.ps_pps_base + pps_id;
261 if(0 == ps_pps->i1_pps_valid)
262 {
263 pps_t *ps_pps_ref = ps_codec->ps_pps_base;
264 while(0 == ps_pps_ref->i1_pps_valid)
265 {
266 ps_pps_ref++;
267 if((ps_pps_ref - ps_codec->ps_pps_base >= MAX_PPS_CNT - 1))
268 return IHEVCD_INVALID_HEADER;
269 }
270
271 ihevcd_copy_pps(ps_codec, pps_id, ps_pps_ref->i1_pps_id);
272 }
273
274 /* Get SPS id for the current PPS */
275 sps_id = ps_pps->i1_sps_id;
276
277 /* Get the current SPS structure */
278 ps_sps = ps_codec->s_parse.ps_sps_base + sps_id;
279
280 /* When the current slice is the first in a pic,
281 * check whether the previous frame is complete
282 * If the previous frame is incomplete -
283 * treat the remaining CTBs as skip */
284 if((0 != ps_codec->u4_pic_cnt || ps_codec->i4_pic_present) &&
285 first_slice_in_pic_flag)
286 {
287 if(ps_codec->i4_pic_present)
288 {
289 slice_header_t *ps_slice_hdr_next;
290 ps_codec->i4_slice_error = 1;
291 ps_codec->s_parse.i4_cur_slice_idx--;
292 if(ps_codec->s_parse.i4_cur_slice_idx < 0)
293 ps_codec->s_parse.i4_cur_slice_idx = 0;
294
295 ps_slice_hdr_next = ps_codec->s_parse.ps_slice_hdr_base + ((ps_codec->s_parse.i4_cur_slice_idx + 1) & (MAX_SLICE_HDR_CNT - 1));
296 ps_slice_hdr_next->i2_ctb_x = 0;
297 ps_slice_hdr_next->i2_ctb_y = ps_codec->s_parse.ps_sps->i2_pic_ht_in_ctb;
298 return ret;
299 }
300 else
301 {
302 ps_codec->i4_slice_error = 0;
303 }
304 }
305
306 if(first_slice_in_pic_flag)
307 {
308 ps_codec->s_parse.i4_cur_slice_idx = 0;
309 }
310 else
311 {
312 /* If the current slice is not the first slice in the pic,
313 * but the first one to be parsed, set the current slice indx to 1
314 * Treat the first slice to be missing and copy the current slice header
315 * to the first one */
316 if(0 == ps_codec->i4_pic_present)
317 ps_codec->s_parse.i4_cur_slice_idx = 1;
318 }
319
320 ps_slice_hdr = ps_codec->s_parse.ps_slice_hdr_base + (ps_codec->s_parse.i4_cur_slice_idx & (MAX_SLICE_HDR_CNT - 1));
321
322
323 if((ps_pps->i1_dependent_slice_enabled_flag) &&
324 (!first_slice_in_pic_flag))
325 {
326 BITS_PARSE("dependent_slice_flag", value, ps_bitstrm, 1);
327
328 /* If dependendent slice, copy slice header from previous slice */
329 if(value && (ps_codec->s_parse.i4_cur_slice_idx > 0))
330 {
331 ihevcd_copy_slice_hdr(ps_codec,
332 (ps_codec->s_parse.i4_cur_slice_idx & (MAX_SLICE_HDR_CNT - 1)),
333 ((ps_codec->s_parse.i4_cur_slice_idx - 1) & (MAX_SLICE_HDR_CNT - 1)));
334 }
335 ps_slice_hdr->i1_dependent_slice_flag = value;
336 }
337 else
338 {
339 ps_slice_hdr->i1_dependent_slice_flag = 0;
340 }
341 ps_slice_hdr->i1_nal_unit_type = i1_nal_unit_type;
342 ps_slice_hdr->i1_pps_id = pps_id;
343 ps_slice_hdr->i1_first_slice_in_pic_flag = first_slice_in_pic_flag;
344
345 ps_slice_hdr->i1_no_output_of_prior_pics_flag = 1;
346 if((NAL_BLA_W_LP <= i1_nal_unit_type) &&
347 (NAL_RSV_RAP_VCL23 >= i1_nal_unit_type))
348 {
349 ps_slice_hdr->i1_no_output_of_prior_pics_flag = no_output_of_prior_pics_flag;
350 }
351 ps_slice_hdr->i1_pps_id = pps_id;
352
353 if(!ps_slice_hdr->i1_first_slice_in_pic_flag)
354 {
355 WORD32 num_bits;
356
357 /* Use CLZ to compute Ceil( Log2( PicSizeInCtbsY ) ) */
358 num_bits = 32 - CLZ(ps_sps->i4_pic_size_in_ctb - 1);
359 BITS_PARSE("slice_address", value, ps_bitstrm, num_bits);
360
361 slice_address = value;
362 /* If slice address is greater than the number of CTBs in a picture,
363 * ignore the slice */
364 if(value >= ps_sps->i4_pic_size_in_ctb || value == 0)
365 return IHEVCD_IGNORE_SLICE;
366 }
367 else
368 {
369 slice_address = 0;
370 }
371
372 if(!ps_slice_hdr->i1_dependent_slice_flag)
373 {
374 ps_slice_hdr->i1_pic_output_flag = 1;
375 ps_slice_hdr->i4_pic_order_cnt_lsb = 0;
376 ps_slice_hdr->i1_num_long_term_sps = 0;
377 ps_slice_hdr->i1_num_long_term_pics = 0;
378
379 for(i = 0; i < ps_pps->i1_num_extra_slice_header_bits; i++)
380 {
381 BITS_PARSE("slice_reserved_undetermined_flag[ i ]", value, ps_bitstrm, 1);
382 //slice_reserved_undetermined_flag[ i ]
383 }
384 UEV_PARSE("slice_type", value, ps_bitstrm);
385 if(value > 2)
386 {
387 return IHEVCD_INVALID_PARAMETER;
388 }
389 ps_slice_hdr->i1_slice_type = value;
390
391 /* If the picture is IRAP, slice type must be equal to ISLICE */
392 if((ps_slice_hdr->i1_nal_unit_type >= NAL_BLA_W_LP) &&
393 (ps_slice_hdr->i1_nal_unit_type <= NAL_RSV_RAP_VCL23))
394 ps_slice_hdr->i1_slice_type = ISLICE;
395
396 if((ps_slice_hdr->i1_slice_type < 0) ||
397 (ps_slice_hdr->i1_slice_type > 2))
398 return IHEVCD_IGNORE_SLICE;
399
400 if(ps_pps->i1_output_flag_present_flag)
401 {
402 BITS_PARSE("pic_output_flag", value, ps_bitstrm, 1);
403 ps_slice_hdr->i1_pic_output_flag = value;
404 }
405 ps_slice_hdr->i1_colour_plane_id = 0;
406 if(1 == ps_sps->i1_separate_colour_plane_flag)
407 {
408 BITS_PARSE("colour_plane_id", value, ps_bitstrm, 2);
409 ps_slice_hdr->i1_colour_plane_id = value;
410 }
411 ps_slice_hdr->i1_slice_temporal_mvp_enable_flag = 0;
412
413 if(!idr_pic_flag)
414 {
415
416 WORD32 st_rps_idx;
417 WORD32 num_neg_pics;
418 WORD32 num_pos_pics;
419 WORD8 *pi1_used;
420
421 BITS_PARSE("pic_order_cnt_lsb", value, ps_bitstrm, ps_sps->i1_log2_max_pic_order_cnt_lsb);
422 //value = ihevcd_extend_sign_bit(value, ps_sps->i1_log2_max_pic_order_cnt_lsb);
423 ps_slice_hdr->i4_pic_order_cnt_lsb = value;
424
425 BITS_PARSE("short_term_ref_pic_set_sps_flag", value, ps_bitstrm, 1);
426 ps_slice_hdr->i1_short_term_ref_pic_set_sps_flag = value;
427
428 if(1 == ps_slice_hdr->i1_short_term_ref_pic_set_sps_flag)
429 {
430 WORD32 numbits;
431
432 ps_slice_hdr->i1_short_term_ref_pic_set_idx = 0;
433 if(ps_sps->i1_num_short_term_ref_pic_sets > 1)
434 {
435 numbits = 32 - CLZ(ps_sps->i1_num_short_term_ref_pic_sets - 1);
436 BITS_PARSE("short_term_ref_pic_set_idx", value, ps_bitstrm, numbits);
437 ps_slice_hdr->i1_short_term_ref_pic_set_idx = value;
438 }
439
440 st_rps_idx = ps_slice_hdr->i1_short_term_ref_pic_set_idx;
441 num_neg_pics = ps_sps->as_stref_picset[st_rps_idx].i1_num_neg_pics;
442 num_pos_pics = ps_sps->as_stref_picset[st_rps_idx].i1_num_pos_pics;
443 pi1_used = ps_sps->as_stref_picset[st_rps_idx].ai1_used;
444 }
445 else
446 {
447 ret = ihevcd_short_term_ref_pic_set(ps_bitstrm,
448 &ps_sps->as_stref_picset[0],
449 ps_sps->i1_num_short_term_ref_pic_sets,
450 ps_sps->i1_num_short_term_ref_pic_sets,
451 &ps_slice_hdr->s_stref_picset);
452 if (ret != IHEVCD_SUCCESS)
453 {
454 return ret;
455 }
456 st_rps_idx = ps_sps->i1_num_short_term_ref_pic_sets;
457 num_neg_pics = ps_slice_hdr->s_stref_picset.i1_num_neg_pics;
458 num_pos_pics = ps_slice_hdr->s_stref_picset.i1_num_pos_pics;
459 pi1_used = ps_slice_hdr->s_stref_picset.ai1_used;
460 }
461
462 if(ps_sps->i1_long_term_ref_pics_present_flag)
463 {
464 if(ps_sps->i1_num_long_term_ref_pics_sps > 0)
465 {
466 UEV_PARSE("num_long_term_sps", value, ps_bitstrm);
467 if(value > ps_sps->i1_num_long_term_ref_pics_sps)
468 {
469 return IHEVCD_INVALID_PARAMETER;
470 }
471 ps_slice_hdr->i1_num_long_term_sps = value;
472 }
473 UEV_PARSE("num_long_term_pics", value, ps_bitstrm);
474 if((value + ps_slice_hdr->i1_num_long_term_sps + num_neg_pics + num_pos_pics) > (MAX_DPB_SIZE - 1))
475 {
476 return IHEVCD_INVALID_PARAMETER;
477 }
478 ps_slice_hdr->i1_num_long_term_pics = value;
479
480 for(i = 0; i < (ps_slice_hdr->i1_num_long_term_sps +
481 ps_slice_hdr->i1_num_long_term_pics); i++)
482 {
483 if(i < ps_slice_hdr->i1_num_long_term_sps)
484 {
485 /* Use CLZ to compute Ceil( Log2( num_long_term_ref_pics_sps ) ) */
486 if (ps_sps->i1_num_long_term_ref_pics_sps > 1)
487 {
488 WORD32 num_bits = 32 - CLZ(ps_sps->i1_num_long_term_ref_pics_sps - 1);
489 BITS_PARSE("lt_idx_sps[ i ]", value, ps_bitstrm, num_bits);
490 }
491 else
492 {
493 value = 0;
494 }
495 ps_slice_hdr->ai4_poc_lsb_lt[i] = ps_sps->au2_lt_ref_pic_poc_lsb_sps[value];
496 ps_slice_hdr->ai1_used_by_curr_pic_lt_flag[i] = ps_sps->ai1_used_by_curr_pic_lt_sps_flag[value];
497
498 }
499 else
500 {
501 BITS_PARSE("poc_lsb_lt[ i ]", value, ps_bitstrm, ps_sps->i1_log2_max_pic_order_cnt_lsb);
502 ps_slice_hdr->ai4_poc_lsb_lt[i] = value;
503
504 BITS_PARSE("used_by_curr_pic_lt_flag[ i ]", value, ps_bitstrm, 1);
505 ps_slice_hdr->ai1_used_by_curr_pic_lt_flag[i] = value;
506
507 }
508 BITS_PARSE("delta_poc_msb_present_flag[ i ]", value, ps_bitstrm, 1);
509 ps_slice_hdr->ai1_delta_poc_msb_present_flag[i] = value;
510
511
512 ps_slice_hdr->ai1_delta_poc_msb_cycle_lt[i] = 0;
513 if(ps_slice_hdr->ai1_delta_poc_msb_present_flag[i])
514 {
515
516 UEV_PARSE("delata_poc_msb_cycle_lt[ i ]", value, ps_bitstrm);
517 ps_slice_hdr->ai1_delta_poc_msb_cycle_lt[i] = value;
518 }
519
520 if((i != 0) && (i != ps_slice_hdr->i1_num_long_term_sps))
521 {
522 ps_slice_hdr->ai1_delta_poc_msb_cycle_lt[i] += ps_slice_hdr->ai1_delta_poc_msb_cycle_lt[i - 1];
523 }
524
525 }
526 }
527
528 for(i = 0; i < num_neg_pics + num_pos_pics; i++)
529 {
530 if(pi1_used[i])
531 {
532 num_poc_total_curr++;
533 }
534 }
535 for(i = 0; i < ps_slice_hdr->i1_num_long_term_sps + ps_slice_hdr->i1_num_long_term_pics; i++)
536 {
537 if(ps_slice_hdr->ai1_used_by_curr_pic_lt_flag[i])
538 {
539 num_poc_total_curr++;
540 }
541 }
542
543
544 if(ps_sps->i1_sps_temporal_mvp_enable_flag)
545 {
546 BITS_PARSE("enable_temporal_mvp_flag", value, ps_bitstrm, 1);
547 ps_slice_hdr->i1_slice_temporal_mvp_enable_flag = value;
548 }
549
550 }
551 ps_slice_hdr->i1_slice_sao_luma_flag = 0;
552 ps_slice_hdr->i1_slice_sao_chroma_flag = 0;
553 if(ps_sps->i1_sample_adaptive_offset_enabled_flag)
554 {
555 BITS_PARSE("slice_sao_luma_flag", value, ps_bitstrm, 1);
556 ps_slice_hdr->i1_slice_sao_luma_flag = value;
557
558 BITS_PARSE("slice_sao_chroma_flag", value, ps_bitstrm, 1);
559 ps_slice_hdr->i1_slice_sao_chroma_flag = value;
560
561 }
562
563 ps_slice_hdr->i1_max_num_merge_cand = 1;
564 ps_slice_hdr->i1_cabac_init_flag = 0;
565
566 ps_slice_hdr->i1_num_ref_idx_l0_active = 0;
567 ps_slice_hdr->i1_num_ref_idx_l1_active = 0;
568 ps_slice_hdr->i1_slice_cb_qp_offset = 0;
569 ps_slice_hdr->i1_slice_cr_qp_offset = 0;
570 if((PSLICE == ps_slice_hdr->i1_slice_type) ||
571 (BSLICE == ps_slice_hdr->i1_slice_type))
572 {
573 BITS_PARSE("num_ref_idx_active_override_flag", value, ps_bitstrm, 1);
574 ps_slice_hdr->i1_num_ref_idx_active_override_flag = value;
575
576 if(ps_slice_hdr->i1_num_ref_idx_active_override_flag)
577 {
578 UEV_PARSE("num_ref_idx_l0_active_minus1", value, ps_bitstrm);
579 if(value > MAX_DPB_SIZE - 2)
580 {
581 return IHEVCD_INVALID_PARAMETER;
582 }
583 ps_slice_hdr->i1_num_ref_idx_l0_active = value + 1;
584
585 if(BSLICE == ps_slice_hdr->i1_slice_type)
586 {
587 UEV_PARSE("num_ref_idx_l1_active_minus1", value, ps_bitstrm);
588 if(value > MAX_DPB_SIZE - 2)
589 {
590 return IHEVCD_INVALID_PARAMETER;
591 }
592 ps_slice_hdr->i1_num_ref_idx_l1_active = value + 1;
593 }
594
595 }
596 else
597 {
598 ps_slice_hdr->i1_num_ref_idx_l0_active = ps_pps->i1_num_ref_idx_l0_default_active;
599 if(BSLICE == ps_slice_hdr->i1_slice_type)
600 {
601 ps_slice_hdr->i1_num_ref_idx_l1_active = ps_pps->i1_num_ref_idx_l1_default_active;
602 }
603 }
604
605 if(0 == num_poc_total_curr)
606 return IHEVCD_IGNORE_SLICE;
607 if((ps_pps->i1_lists_modification_present_flag) && (num_poc_total_curr > 1))
608 {
609 ihevcd_ref_pic_list_modification(ps_bitstrm,
610 ps_slice_hdr, num_poc_total_curr);
611 }
612 else
613 {
614 ps_slice_hdr->s_rplm.i1_ref_pic_list_modification_flag_l0 = 0;
615 ps_slice_hdr->s_rplm.i1_ref_pic_list_modification_flag_l1 = 0;
616 }
617
618 if(BSLICE == ps_slice_hdr->i1_slice_type)
619 {
620 BITS_PARSE("mvd_l1_zero_flag", value, ps_bitstrm, 1);
621 ps_slice_hdr->i1_mvd_l1_zero_flag = value;
622 }
623
624 ps_slice_hdr->i1_cabac_init_flag = 0;
625 if(ps_pps->i1_cabac_init_present_flag)
626 {
627 BITS_PARSE("cabac_init_flag", value, ps_bitstrm, 1);
628 ps_slice_hdr->i1_cabac_init_flag = value;
629
630 }
631 ps_slice_hdr->i1_collocated_from_l0_flag = 1;
632 ps_slice_hdr->i1_collocated_ref_idx = 0;
633 if(ps_slice_hdr->i1_slice_temporal_mvp_enable_flag)
634 {
635 if(BSLICE == ps_slice_hdr->i1_slice_type)
636 {
637 BITS_PARSE("collocated_from_l0_flag", value, ps_bitstrm, 1);
638 ps_slice_hdr->i1_collocated_from_l0_flag = value;
639 }
640
641 if((ps_slice_hdr->i1_collocated_from_l0_flag && (ps_slice_hdr->i1_num_ref_idx_l0_active > 1)) ||
642 (!ps_slice_hdr->i1_collocated_from_l0_flag && (ps_slice_hdr->i1_num_ref_idx_l1_active > 1)))
643 {
644 UEV_PARSE("collocated_ref_idx", value, ps_bitstrm);
645 if((PSLICE == ps_slice_hdr->i1_slice_type || BSLICE == ps_slice_hdr->i1_slice_type) &&
646 ps_slice_hdr->i1_collocated_from_l0_flag)
647 {
648 if(value >= ps_slice_hdr->i1_num_ref_idx_l0_active)
649 {
650 return IHEVCD_INVALID_PARAMETER;
651 }
652 }
653 if(BSLICE == ps_slice_hdr->i1_slice_type && !ps_slice_hdr->i1_collocated_from_l0_flag)
654 {
655 if(value >= ps_slice_hdr->i1_num_ref_idx_l1_active)
656 {
657 return IHEVCD_INVALID_PARAMETER;
658 }
659 }
660 ps_slice_hdr->i1_collocated_ref_idx = value;
661 }
662
663 }
664
665 if((ps_pps->i1_weighted_pred_flag && (PSLICE == ps_slice_hdr->i1_slice_type)) ||
666 (ps_pps->i1_weighted_bipred_flag && (BSLICE == ps_slice_hdr->i1_slice_type)))
667 {
668 ihevcd_parse_pred_wt_ofst(ps_bitstrm, ps_sps, ps_pps, ps_slice_hdr);
669 }
670 UEV_PARSE("five_minus_max_num_merge_cand", value, ps_bitstrm);
671 if(value > 4)
672 {
673 return IHEVCD_INVALID_PARAMETER;
674 }
675 ps_slice_hdr->i1_max_num_merge_cand = 5 - value;
676
677 }
678 SEV_PARSE("slice_qp_delta", i4_value, ps_bitstrm);
679 if((i4_value + ps_pps->i1_pic_init_qp) < 0 || (i4_value + ps_pps->i1_pic_init_qp) > MAX_HEVC_QP)
680 {
681 return IHEVCD_INVALID_PARAMETER;
682 }
683 ps_slice_hdr->i1_slice_qp_delta = i4_value;
684
685 if(ps_pps->i1_pic_slice_level_chroma_qp_offsets_present_flag)
686 {
687 SEV_PARSE("slice_cb_qp_offset", i4_value, ps_bitstrm);
688 if(i4_value < -12 || i4_value > 12)
689 {
690 return IHEVCD_INVALID_PARAMETER;
691 }
692 ps_slice_hdr->i1_slice_cb_qp_offset = i4_value;
693
694 SEV_PARSE("slice_cr_qp_offset", i4_value, ps_bitstrm);
695 if(i4_value < -12 || i4_value > 12)
696 {
697 return IHEVCD_INVALID_PARAMETER;
698 }
699 ps_slice_hdr->i1_slice_cr_qp_offset = i4_value;
700
701 }
702 ps_slice_hdr->i1_deblocking_filter_override_flag = 0;
703 ps_slice_hdr->i1_slice_disable_deblocking_filter_flag = ps_pps->i1_pic_disable_deblocking_filter_flag;
704 ps_slice_hdr->i1_beta_offset_div2 = ps_pps->i1_beta_offset_div2;
705 ps_slice_hdr->i1_tc_offset_div2 = ps_pps->i1_tc_offset_div2;
706
707 disable_deblocking_filter_flag = ps_pps->i1_pic_disable_deblocking_filter_flag;
708
709 if(ps_pps->i1_deblocking_filter_control_present_flag)
710 {
711
712 if(ps_pps->i1_deblocking_filter_override_enabled_flag)
713 {
714 BITS_PARSE("deblocking_filter_override_flag", value, ps_bitstrm, 1);
715 ps_slice_hdr->i1_deblocking_filter_override_flag = value;
716 }
717
718 if(ps_slice_hdr->i1_deblocking_filter_override_flag)
719 {
720 BITS_PARSE("slice_disable_deblocking_filter_flag", value, ps_bitstrm, 1);
721 ps_slice_hdr->i1_slice_disable_deblocking_filter_flag = value;
722 disable_deblocking_filter_flag = ps_slice_hdr->i1_slice_disable_deblocking_filter_flag;
723
724 if(!ps_slice_hdr->i1_slice_disable_deblocking_filter_flag)
725 {
726 SEV_PARSE("beta_offset_div2", i4_value, ps_bitstrm);
727 if(i4_value < -6 || i4_value > 6)
728 {
729 return IHEVCD_INVALID_PARAMETER;
730 }
731 ps_slice_hdr->i1_beta_offset_div2 = i4_value;
732
733 SEV_PARSE("tc_offset_div2", i4_value, ps_bitstrm);
734 if(i4_value < -6 || i4_value > 6)
735 {
736 return IHEVCD_INVALID_PARAMETER;
737 }
738 ps_slice_hdr->i1_tc_offset_div2 = i4_value;
739
740 }
741 }
742 }
743
744 ps_slice_hdr->i1_slice_loop_filter_across_slices_enabled_flag = ps_pps->i1_loop_filter_across_slices_enabled_flag;
745 if(ps_pps->i1_loop_filter_across_slices_enabled_flag &&
746 (ps_slice_hdr->i1_slice_sao_luma_flag || ps_slice_hdr->i1_slice_sao_chroma_flag || !disable_deblocking_filter_flag))
747 {
748 BITS_PARSE("slice_loop_filter_across_slices_enabled_flag", value, ps_bitstrm, 1);
749 ps_slice_hdr->i1_slice_loop_filter_across_slices_enabled_flag = value;
750 }
751
752 }
753
754 /* Check sanity of slice */
755 if((!first_slice_in_pic_flag) &&
756 (ps_codec->i4_pic_present))
757 {
758 slice_header_t *ps_slice_hdr_base = ps_codec->ps_slice_hdr_base;
759
760
761 /* According to the standard, the above conditions must be satisfied - But for error resilience,
762 * only the following conditions are checked */
763 if((ps_slice_hdr_base->i1_pps_id != ps_slice_hdr->i1_pps_id) ||
764 (ps_slice_hdr_base->i4_pic_order_cnt_lsb != ps_slice_hdr->i4_pic_order_cnt_lsb))
765 {
766 return IHEVCD_IGNORE_SLICE;
767 }
768
769 }
770
771
772 if(0 == ps_codec->i4_pic_present)
773 {
774 ps_slice_hdr->i4_abs_pic_order_cnt = ihevcd_calc_poc(ps_codec, ps_nal, ps_sps->i1_log2_max_pic_order_cnt_lsb, ps_slice_hdr->i4_pic_order_cnt_lsb);
775 }
776 else
777 {
778 ps_slice_hdr->i4_abs_pic_order_cnt = ps_codec->s_parse.i4_abs_pic_order_cnt;
779 }
780
781
782 if(!first_slice_in_pic_flag)
783 {
784 /* Check if the current slice belongs to the same pic (Pic being parsed) */
785 if(ps_codec->s_parse.i4_abs_pic_order_cnt == ps_slice_hdr->i4_abs_pic_order_cnt)
786 {
787
788 /* If the Next CTB's index is less than the slice address,
789 * the previous slice is incomplete.
790 * Indicate slice error, and treat the remaining CTBs as skip */
791 if(slice_address > ps_codec->s_parse.i4_next_ctb_indx)
792 {
793 if(ps_codec->i4_pic_present)
794 {
795 prev_slice_incomplete_flag = 1;
796 }
797 else
798 {
799 return IHEVCD_IGNORE_SLICE;
800 }
801 }
802 /* If the slice address is less than the next CTB's index,
803 * extra CTBs have been decoded in the previous slice.
804 * Ignore the current slice. Treat it as incomplete */
805 else if(slice_address < ps_codec->s_parse.i4_next_ctb_indx)
806 {
807 return IHEVCD_IGNORE_SLICE;
808 }
809 else
810 {
811 ps_codec->i4_slice_error = 0;
812 }
813 }
814
815 /* The current slice does not belong to the pic that is being parsed */
816 else
817 {
818 /* The previous pic is incomplete.
819 * Treat the remaining CTBs as skip */
820 if(ps_codec->i4_pic_present)
821 {
822 slice_header_t *ps_slice_hdr_next;
823 ps_codec->i4_slice_error = 1;
824 ps_codec->s_parse.i4_cur_slice_idx--;
825 if(ps_codec->s_parse.i4_cur_slice_idx < 0)
826 ps_codec->s_parse.i4_cur_slice_idx = 0;
827
828 ps_slice_hdr_next = ps_codec->s_parse.ps_slice_hdr_base + ((ps_codec->s_parse.i4_cur_slice_idx + 1) & (MAX_SLICE_HDR_CNT - 1));
829 ps_slice_hdr_next->i2_ctb_x = 0;
830 ps_slice_hdr_next->i2_ctb_y = ps_codec->s_parse.ps_sps->i2_pic_ht_in_ctb;
831 return ret;
832 }
833
834 /* If the previous pic is complete,
835 * return if the current slice is dependant
836 * otherwise, update the parse context's POC */
837 else
838 {
839 if(ps_slice_hdr->i1_dependent_slice_flag)
840 return IHEVCD_IGNORE_SLICE;
841
842 ps_codec->s_parse.i4_abs_pic_order_cnt = ps_slice_hdr->i4_abs_pic_order_cnt;
843 }
844 }
845 }
846
847 /* If the slice is the first slice in the pic, update the parse context's POC */
848 else
849 {
850 /* If the first slice is repeated, ignore the second occurrence
851 * If any other slice is repeated, the CTB addr will be greater than the slice addr,
852 * and hence the second occurrence is ignored */
853 if(ps_codec->s_parse.i4_abs_pic_order_cnt == ps_slice_hdr->i4_abs_pic_order_cnt)
854 return IHEVCD_IGNORE_SLICE;
855
856 ps_codec->s_parse.i4_abs_pic_order_cnt = ps_slice_hdr->i4_abs_pic_order_cnt;
857 }
858
859 // printf("POC: %d\n", ps_slice_hdr->i4_abs_pic_order_cnt);
860 // AEV_TRACE("POC", ps_slice_hdr->i4_abs_pic_order_cnt, 0);
861 ps_slice_hdr->i4_num_entry_point_offsets = 0;
862 if((ps_pps->i1_tiles_enabled_flag) ||
863 (ps_pps->i1_entropy_coding_sync_enabled_flag))
864 {
865 UEV_PARSE("num_entry_point_offsets", value, ps_bitstrm);
866 ps_slice_hdr->i4_num_entry_point_offsets = value;
867
868 {
869 WORD32 max_num_entry_point_offsets;
870 if((ps_pps->i1_tiles_enabled_flag) &&
871 (ps_pps->i1_entropy_coding_sync_enabled_flag))
872 {
873 max_num_entry_point_offsets = ps_pps->i1_num_tile_columns * ps_sps->i2_pic_ht_in_ctb - 1;
874 }
875 else if(ps_pps->i1_tiles_enabled_flag)
876 {
877 max_num_entry_point_offsets = ps_pps->i1_num_tile_columns * ps_pps->i1_num_tile_rows - 1 ;
878 }
879 else
880 {
881 max_num_entry_point_offsets = (ps_sps->i2_pic_ht_in_ctb - 1);
882 }
883
884 if(ps_slice_hdr->i4_num_entry_point_offsets < 0 || ps_slice_hdr->i4_num_entry_point_offsets > max_num_entry_point_offsets)
885 {
886 return IHEVCD_INVALID_PARAMETER;
887 }
888 }
889
890 if(ps_slice_hdr->i4_num_entry_point_offsets > 0)
891 {
892 UEV_PARSE("offset_len_minus1", value, ps_bitstrm);
893 if(value > 31)
894 {
895 return IHEVCD_INVALID_PARAMETER;
896 }
897 ps_slice_hdr->i1_offset_len = value + 1;
898
899 for(i = 0; i < ps_slice_hdr->i4_num_entry_point_offsets; i++)
900 {
901 BITS_PARSE("entry_point_offset", value, ps_bitstrm, ps_slice_hdr->i1_offset_len);
902
903 /* TODO: pu4_entry_point_offset needs to be initialized */
904 //ps_slice_hdr->pu4_entry_point_offset[i] = value;
905 }
906
907 }
908 }
909
910 if(ps_pps->i1_slice_header_extension_present_flag)
911 {
912 UEV_PARSE("slice_header_extension_length", value, ps_bitstrm);
913 if(value > 256)
914 {
915 return IHEVCD_INVALID_PARAMETER;
916 }
917 ps_slice_hdr->i2_slice_header_extension_length = value;
918
919
920 for(i = 0; i < ps_slice_hdr->i2_slice_header_extension_length; i++)
921 {
922 BITS_PARSE("slice_header_extension_data_byte", value, ps_bitstrm, 8);
923 }
924
925 }
926
927 ihevcd_bits_flush_to_byte_boundary(ps_bitstrm);
928
929 if((UWORD8 *)ps_bitstrm->pu4_buf > ps_bitstrm->pu1_buf_max)
930 return IHEVCD_INVALID_PARAMETER;
931
932 {
933 dpb_mgr_t *ps_dpb_mgr = (dpb_mgr_t *)ps_codec->pv_dpb_mgr;
934 WORD32 r_idx;
935
936 if((NAL_IDR_W_LP == ps_slice_hdr->i1_nal_unit_type) ||
937 (NAL_IDR_N_LP == ps_slice_hdr->i1_nal_unit_type) ||
938 (NAL_BLA_N_LP == ps_slice_hdr->i1_nal_unit_type) ||
939 (NAL_BLA_W_DLP == ps_slice_hdr->i1_nal_unit_type) ||
940 (NAL_BLA_W_LP == ps_slice_hdr->i1_nal_unit_type) ||
941 (0 == ps_codec->u4_pic_cnt))
942 {
943 for(i = 0; i < MAX_DPB_BUFS; i++)
944 {
945 if(ps_dpb_mgr->as_dpb_info[i].ps_pic_buf)
946 {
947 pic_buf_t *ps_pic_buf = ps_dpb_mgr->as_dpb_info[i].ps_pic_buf;
948 mv_buf_t *ps_mv_buf;
949
950 /* Long term index is set to MAX_DPB_BUFS to ensure it is not added as LT */
951 ihevc_dpb_mgr_del_ref((dpb_mgr_t *)ps_codec->pv_dpb_mgr, (buf_mgr_t *)ps_codec->pv_pic_buf_mgr, ps_pic_buf->i4_abs_poc);
952 /* Find buffer id of the MV bank corresponding to the buffer being freed (Buffer with POC of u4_abs_poc) */
953 ps_mv_buf = (mv_buf_t *)ps_codec->ps_mv_buf;
954 for(j = 0; j < ps_codec->i4_max_dpb_size; j++)
955 {
956 if(ps_mv_buf && ps_mv_buf->i4_abs_poc == ps_pic_buf->i4_abs_poc)
957 {
958 ihevc_buf_mgr_release((buf_mgr_t *)ps_codec->pv_mv_buf_mgr, j, BUF_MGR_REF);
959 break;
960 }
961 ps_mv_buf++;
962 }
963
964 }
965
966 }
967
968 /* Initialize the reference lists to NULL
969 * This is done to take care of the cases where the first pic is not IDR
970 * but the reference list is not created for the first pic because
971 * pic count is zero leaving the reference list uninitialised */
972 for(r_idx = 0; r_idx < MAX_DPB_SIZE; r_idx++)
973 {
974 ps_slice_hdr->as_ref_pic_list0[r_idx].pv_pic_buf = NULL;
975 ps_slice_hdr->as_ref_pic_list0[r_idx].pv_mv_buf = NULL;
976
977 ps_slice_hdr->as_ref_pic_list1[r_idx].pv_pic_buf = NULL;
978 ps_slice_hdr->as_ref_pic_list1[r_idx].pv_mv_buf = NULL;
979 }
980
981 }
982 else
983 {
984 ret = ihevcd_ref_list(ps_codec, ps_pps, ps_sps, ps_slice_hdr);
985 if ((WORD32)IHEVCD_SUCCESS != ret)
986 {
987 return ret;
988 }
989
990 }
991
992 }
993
994 /* Fill the remaining entries of the reference lists with the nearest POC
995 * This is done to handle cases where there is a corruption in the reference index */
996 if(ps_codec->i4_pic_present)
997 {
998 pic_buf_t *ps_pic_buf_ref;
999 mv_buf_t *ps_mv_buf_ref;
1000 WORD32 r_idx;
1001 dpb_mgr_t *ps_dpb_mgr = (dpb_mgr_t *)ps_codec->pv_dpb_mgr;
1002 buf_mgr_t *ps_mv_buf_mgr = (buf_mgr_t *)ps_codec->pv_mv_buf_mgr;
1003
1004 ps_pic_buf_ref = ihevc_dpb_mgr_get_ref_by_nearest_poc(ps_dpb_mgr, ps_slice_hdr->i4_abs_pic_order_cnt);
1005 if(NULL == ps_pic_buf_ref)
1006 {
1007 ps_pic_buf_ref = ps_codec->as_process[0].ps_cur_pic;
1008 ps_mv_buf_ref = ps_codec->s_parse.ps_cur_mv_buf;
1009 }
1010 else
1011 {
1012 ps_mv_buf_ref = ihevcd_mv_mgr_get_poc(ps_mv_buf_mgr, ps_pic_buf_ref->i4_abs_poc);
1013 }
1014
1015 for(r_idx = 0; r_idx < ps_slice_hdr->i1_num_ref_idx_l0_active; r_idx++)
1016 {
1017 if(NULL == ps_slice_hdr->as_ref_pic_list0[r_idx].pv_pic_buf)
1018 {
1019 ps_slice_hdr->as_ref_pic_list0[r_idx].pv_pic_buf = (void *)ps_pic_buf_ref;
1020 ps_slice_hdr->as_ref_pic_list0[r_idx].pv_mv_buf = (void *)ps_mv_buf_ref;
1021 }
1022 }
1023
1024 for(r_idx = ps_slice_hdr->i1_num_ref_idx_l0_active; r_idx < MAX_DPB_SIZE; r_idx++)
1025 {
1026 ps_slice_hdr->as_ref_pic_list0[r_idx].pv_pic_buf = (void *)ps_pic_buf_ref;
1027 ps_slice_hdr->as_ref_pic_list0[r_idx].pv_mv_buf = (void *)ps_mv_buf_ref;
1028 }
1029
1030 for(r_idx = 0; r_idx < ps_slice_hdr->i1_num_ref_idx_l1_active; r_idx++)
1031 {
1032 if(NULL == ps_slice_hdr->as_ref_pic_list1[r_idx].pv_pic_buf)
1033 {
1034 ps_slice_hdr->as_ref_pic_list1[r_idx].pv_pic_buf = (void *)ps_pic_buf_ref;
1035 ps_slice_hdr->as_ref_pic_list1[r_idx].pv_mv_buf = (void *)ps_mv_buf_ref;
1036 }
1037 }
1038
1039 for(r_idx = ps_slice_hdr->i1_num_ref_idx_l1_active; r_idx < MAX_DPB_SIZE; r_idx++)
1040 {
1041 ps_slice_hdr->as_ref_pic_list1[r_idx].pv_pic_buf = (void *)ps_pic_buf_ref;
1042 ps_slice_hdr->as_ref_pic_list1[r_idx].pv_mv_buf = (void *)ps_mv_buf_ref;
1043 }
1044 }
1045
1046 /* Update slice address in the header */
1047 if(!ps_slice_hdr->i1_first_slice_in_pic_flag)
1048 {
1049 ps_slice_hdr->i2_ctb_x = slice_address % ps_sps->i2_pic_wd_in_ctb;
1050 ps_slice_hdr->i2_ctb_y = slice_address / ps_sps->i2_pic_wd_in_ctb;
1051
1052 if(!ps_slice_hdr->i1_dependent_slice_flag)
1053 {
1054 ps_slice_hdr->i2_independent_ctb_x = ps_slice_hdr->i2_ctb_x;
1055 ps_slice_hdr->i2_independent_ctb_y = ps_slice_hdr->i2_ctb_y;
1056 }
1057 }
1058 else
1059 {
1060 ps_slice_hdr->i2_ctb_x = 0;
1061 ps_slice_hdr->i2_ctb_y = 0;
1062
1063 ps_slice_hdr->i2_independent_ctb_x = 0;
1064 ps_slice_hdr->i2_independent_ctb_y = 0;
1065 }
1066
1067 /* If the first slice in the pic is missing, copy the current slice header to
1068 * the first slice's header */
1069 if((!first_slice_in_pic_flag) &&
1070 (0 == ps_codec->i4_pic_present))
1071 {
1072 slice_header_t *ps_slice_hdr_prev = ps_codec->s_parse.ps_slice_hdr_base;
1073 ihevcd_copy_slice_hdr(ps_codec, 0, (ps_codec->s_parse.i4_cur_slice_idx & (MAX_SLICE_HDR_CNT - 1)));
1074
1075 prev_slice_incomplete_flag = 1;
1076 ASSERT(ps_codec->s_parse.i4_cur_slice_idx == 1);
1077
1078 ps_slice_hdr_prev->i2_ctb_x = 0;
1079 ps_slice_hdr_prev->i2_ctb_y = 0;
1080
1081 ps_codec->s_parse.i4_ctb_x = 0;
1082 ps_codec->s_parse.i4_ctb_y = 0;
1083
1084 ps_codec->s_parse.i4_cur_slice_idx = 0;
1085
1086 if((ps_slice_hdr->i2_ctb_x == 0) &&
1087 (ps_slice_hdr->i2_ctb_y == 0))
1088 {
1089 ps_slice_hdr->i2_ctb_x++;
1090 }
1091 }
1092
1093 {
1094 /* If skip B is enabled,
1095 * ignore pictures that are non-reference
1096 * TODO: (i1_nal_unit_type < NAL_BLA_W_LP) && (i1_nal_unit_type % 2 == 0) only says it is
1097 * sub-layer non-reference slice. May need to find a way to detect actual non-reference pictures*/
1098
1099 if((i1_nal_unit_type < NAL_BLA_W_LP) &&
1100 (i1_nal_unit_type % 2 == 0))
1101 {
1102 if(IVD_SKIP_B == ps_codec->e_pic_skip_mode)
1103 return IHEVCD_IGNORE_SLICE;
1104 }
1105
1106 /* If skip PB is enabled,
1107 * decode only I slices */
1108 if((IVD_SKIP_PB == ps_codec->e_pic_skip_mode) &&
1109 (ISLICE != ps_slice_hdr->i1_slice_type))
1110 {
1111 return IHEVCD_IGNORE_SLICE;
1112 }
1113 }
1114
1115 if(prev_slice_incomplete_flag)
1116 {
1117 ps_codec->i4_slice_error = 1;
1118 ps_codec->s_parse.i4_cur_slice_idx--;
1119 if(ps_codec->s_parse.i4_cur_slice_idx < 0)
1120 ps_codec->s_parse.i4_cur_slice_idx = 0;
1121 }
1122
1123 return ret;
1124 }
1125