1 /******************************************************************************
2 *
3 * Copyright (C) 2015 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 /*!
21 **************************************************************************
22 * \file ih264d_parse_headers.c
23 *
24 * \brief
25 * Contains High level syntax[above slice] parsing routines
26 *
27 * \date
28 * 19/12/2002
29 *
30 * \author AI
31 **************************************************************************
32 */
33 #include "ih264_typedefs.h"
34 #include "ih264_macros.h"
35 #include "ih264_platform_macros.h"
36 #include "ih264d_bitstrm.h"
37 #include "ih264d_structs.h"
38 #include "ih264d_parse_cavlc.h"
39 #include "ih264d_defs.h"
40 #include "ih264d_defs.h"
41 #include "ih264d_defs.h"
42 #include "ih264d_parse_slice.h"
43 #include "ih264d_tables.h"
44 #include "ih264d_utils.h"
45 #include "ih264d_nal.h"
46 #include "ih264d_deblocking.h"
47
48 #include "ih264d_mem_request.h"
49 #include "ih264d_debug.h"
50 #include "ih264d_error_handler.h"
51 #include "ih264d_mb_utils.h"
52 #include "ih264d_sei.h"
53 #include "ih264d_vui.h"
54 #include "ih264d_thread_parse_decode.h"
55 #include "ih264d_thread_compute_bs.h"
56 #include "ih264d_quant_scaling.h"
57 #include "ih264d_defs.h"
58 #include "ivd.h"
59 #include "ih264d.h"
60
61 /*****************************************************************************/
62 /* */
63 /* Function Name : ih264d_parse_slice_partition */
64 /* */
65 /* Description : This function is intended to parse and decode slice part */
66 /* itions. Currently it's not implemented. Decoder will */
67 /* print a message, skips this NAL and continues */
68 /* Inputs : ps_dec Decoder parameters */
69 /* ps_bitstrm Bitstream */
70 /* Globals : None */
71 /* Processing : This functionality needs to be implemented */
72 /* Outputs : None */
73 /* Returns : None */
74 /* */
75 /* Issues : Not implemented */
76 /* */
77 /* Revision History: */
78 /* */
79 /* DD MM YYYY Author(s) Changes (Describe the changes made) */
80 /* 06 05 2002 NS Draft */
81 /* */
82 /*****************************************************************************/
83
ih264d_parse_slice_partition(dec_struct_t * ps_dec,dec_bit_stream_t * ps_bitstrm)84 WORD32 ih264d_parse_slice_partition(dec_struct_t * ps_dec,
85 dec_bit_stream_t * ps_bitstrm)
86 {
87 H264_DEC_DEBUG_PRINT("\nSlice partition not supported");
88 UNUSED(ps_dec);
89 UNUSED(ps_bitstrm);
90 return (0);
91 }
92
93 /*****************************************************************************/
94 /* */
95 /* Function Name : ih264d_parse_sei */
96 /* */
97 /* Description : This function is intended to parse and decode SEI */
98 /* Currently it's not implemented. Decoder will print a */
99 /* message, skips this NAL and continues */
100 /* Inputs : ps_dec Decoder parameters */
101 /* ps_bitstrm Bitstream */
102 /* Globals : None */
103 /* Processing : This functionality needs to be implemented */
104 /* Outputs : None */
105 /* Returns : None */
106 /* */
107 /* Issues : Not implemented */
108 /* */
109 /* Revision History: */
110 /* */
111 /* DD MM YYYY Author(s) Changes (Describe the changes made) */
112 /* 06 05 2002 NS Draft */
113 /* */
114 /*****************************************************************************/
ih264d_parse_sei(dec_struct_t * ps_dec,dec_bit_stream_t * ps_bitstrm)115 WORD32 ih264d_parse_sei(dec_struct_t * ps_dec, dec_bit_stream_t * ps_bitstrm)
116 {
117 UNUSED(ps_dec);
118 UNUSED(ps_bitstrm);
119 return (0);
120 }
121
122 /*****************************************************************************/
123 /* */
124 /* Function Name : ih264d_parse_filler_data */
125 /* */
126 /* Description : This function is intended to parse and decode filler */
127 /* data NAL. Currently it's not implemented. Decoder will */
128 /* print a message, skips this NAL and continues */
129 /* Inputs : ps_dec Decoder parameters */
130 /* ps_bitstrm Bitstream */
131 /* Globals : None */
132 /* Processing : This functionality needs to be implemented */
133 /* Outputs : None */
134 /* Returns : None */
135 /* */
136 /* Issues : Not implemented */
137 /* */
138 /* Revision History: */
139 /* */
140 /* DD MM YYYY Author(s) Changes (Describe the changes made) */
141 /* 06 05 2002 NS Draft */
142 /* */
143 /*****************************************************************************/
ih264d_parse_filler_data(dec_struct_t * ps_dec,dec_bit_stream_t * ps_bitstrm)144 WORD32 ih264d_parse_filler_data(dec_struct_t * ps_dec,
145 dec_bit_stream_t * ps_bitstrm)
146 {
147 UNUSED(ps_dec);
148 UNUSED(ps_bitstrm);
149 return (0);
150 }
151
152 /*****************************************************************************/
153 /* */
154 /* Function Name : ih264d_parse_end_of_stream */
155 /* */
156 /* Description : This function is intended to parse and decode end of */
157 /* sequence. Currently it's not implemented. Decoder will */
158 /* print a message, skips this NAL and continues */
159 /* Inputs : ps_dec Decoder parameters */
160 /* Globals : None */
161 /* Processing : This functionality needs to be implemented */
162 /* Outputs : None */
163 /* Returns : None */
164 /* */
165 /* Issues : Not implemented */
166 /* */
167 /* Revision History: */
168 /* */
169 /* DD MM YYYY Author(s) Changes (Describe the changes made) */
170 /* 06 05 2002 NS Draft */
171 /* */
172 /*****************************************************************************/
ih264d_parse_end_of_stream(dec_struct_t * ps_dec)173 void ih264d_parse_end_of_stream(dec_struct_t * ps_dec)
174 {
175 UNUSED(ps_dec);
176 return;
177 }
178
179 /*!
180 **************************************************************************
181 * \if Function name : ih264d_parse_pps \endif
182 *
183 * \brief
184 * Decodes Picture Parameter set
185 *
186 * \return
187 * 0 on Success and Error code otherwise
188 **************************************************************************
189 */
ih264d_parse_pps(dec_struct_t * ps_dec,dec_bit_stream_t * ps_bitstrm)190 WORD32 ih264d_parse_pps(dec_struct_t * ps_dec, dec_bit_stream_t * ps_bitstrm)
191 {
192 UWORD8 uc_temp;
193 dec_seq_params_t * ps_sps = NULL;
194 dec_pic_params_t * ps_pps = NULL;
195 UWORD32 *pu4_bitstrm_buf = ps_dec->ps_bitstrm->pu4_buffer;
196 UWORD32 *pu4_bitstrm_ofst = &ps_dec->ps_bitstrm->u4_ofst;
197
198 /* Variables used for error resilience checks */
199 UWORD32 u4_temp;
200 WORD32 i_temp;
201
202 /* For High profile related syntax elements */
203 UWORD8 u1_more_data_flag;
204 WORD32 i4_i;
205
206 /*--------------------------------------------------------------------*/
207 /* Decode pic_parameter_set_id and find corresponding pic params */
208 /*--------------------------------------------------------------------*/
209 u4_temp = ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf);
210 if(u4_temp & MASK_ERR_PIC_SET_ID)
211 return ERROR_INV_SPS_PPS_T;
212 ps_pps = ps_dec->pv_scratch_sps_pps;
213 *ps_pps = ps_dec->ps_pps[u4_temp];
214 ps_pps->u1_pic_parameter_set_id = (WORD8)u4_temp;
215 COPYTHECONTEXT("PPS: pic_parameter_set_id",ps_pps->u1_pic_parameter_set_id);
216
217 /************************************************/
218 /* initilization of High profile syntax element */
219 /************************************************/
220 ps_pps->i4_transform_8x8_mode_flag = 0;
221 ps_pps->i4_pic_scaling_matrix_present_flag = 0;
222
223 /*--------------------------------------------------------------------*/
224 /* Decode seq_parameter_set_id and map it to a seq_parameter_set */
225 /*--------------------------------------------------------------------*/
226 u4_temp = ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf);
227 if(u4_temp & MASK_ERR_SEQ_SET_ID)
228 return ERROR_INV_SPS_PPS_T;
229 COPYTHECONTEXT("PPS: seq_parameter_set_id",u4_temp);
230 ps_sps = &ps_dec->ps_sps[u4_temp];
231 ps_pps->ps_sps = ps_sps;
232
233 /*--------------------------------------------------------------------*/
234 /* Decode entropy_coding_mode */
235 /*--------------------------------------------------------------------*/
236 ps_pps->u1_entropy_coding_mode = ih264d_get_bit_h264(ps_bitstrm);
237 COPYTHECONTEXT("PPS: entropy_coding_mode_flag",ps_pps->u1_entropy_coding_mode);
238
239 ps_pps->u1_pic_order_present_flag = ih264d_get_bit_h264(ps_bitstrm);
240 COPYTHECONTEXT("PPS: pic_order_present_flag",ps_pps->u1_pic_order_present_flag);
241
242 /*--------------------------------------------------------------------*/
243 /* Decode num_slice_groups_minus1 */
244 /*--------------------------------------------------------------------*/
245 u4_temp = ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf) + 1;
246 if(u4_temp != 1)
247 {
248 UWORD32 i4_error_code;
249 i4_error_code = ERROR_FEATURE_UNAVAIL;
250 return i4_error_code;
251 }
252 ps_pps->u1_num_slice_groups = u4_temp;
253 COPYTHECONTEXT("PPS: num_slice_groups_minus1",ps_pps->u1_num_slice_groups -1);
254
255 /*--------------------------------------------------------------------*/
256 /* Other parameter set values */
257 /*--------------------------------------------------------------------*/
258 u4_temp = 1 + ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf);
259 if(u4_temp > H264_MAX_REF_IDX)
260 return ERROR_REF_IDX;
261 ps_pps->u1_num_ref_idx_lx_active[0] = u4_temp;
262 COPYTHECONTEXT("PPS: num_ref_idx_l0_active_minus1",
263 ps_pps->u1_num_ref_idx_lx_active[0] - 1);
264
265 u4_temp = 1 + ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf);
266 if(u4_temp > H264_MAX_REF_IDX)
267 return ERROR_REF_IDX;
268 ps_pps->u1_num_ref_idx_lx_active[1] = u4_temp;
269 COPYTHECONTEXT("PPS: num_ref_idx_l1_active_minus1",
270 ps_pps->u1_num_ref_idx_lx_active[1] - 1);
271
272 ps_pps->u1_wted_pred_flag = ih264d_get_bit_h264(ps_bitstrm);
273 COPYTHECONTEXT("PPS: weighted prediction u4_flag",ps_pps->u1_wted_pred_flag);
274 uc_temp = ih264d_get_bits_h264(ps_bitstrm, 2);
275 COPYTHECONTEXT("PPS: weighted_bipred_idc",uc_temp);
276 ps_pps->u1_wted_bipred_idc = uc_temp;
277
278 if(ps_pps->u1_wted_bipred_idc > MAX_WEIGHT_BIPRED_IDC)
279 return ERROR_INV_SPS_PPS_T;
280
281 i_temp = 26 + ih264d_sev(pu4_bitstrm_ofst, pu4_bitstrm_buf);
282
283 if((i_temp < 0) || (i_temp > 51))
284 return ERROR_INV_RANGE_QP_T;
285
286 ps_pps->u1_pic_init_qp = i_temp;
287 COPYTHECONTEXT("PPS: pic_init_qp_minus26",ps_pps->u1_pic_init_qp - 26);
288
289 i_temp = 26 + ih264d_sev(pu4_bitstrm_ofst, pu4_bitstrm_buf);
290
291 if((i_temp < 0) || (i_temp > 51))
292 return ERROR_INV_RANGE_QP_T;
293
294 ps_pps->u1_pic_init_qs = i_temp;
295 COPYTHECONTEXT("PPS: pic_init_qs_minus26",ps_pps->u1_pic_init_qs - 26);
296
297 i_temp = ih264d_sev(pu4_bitstrm_ofst, pu4_bitstrm_buf);
298 if((i_temp < -12) || (i_temp > 12))
299 return ERROR_INV_RANGE_QP_T;
300 ps_pps->i1_chroma_qp_index_offset = i_temp;
301 COPYTHECONTEXT("PPS: chroma_qp_index_offset",ps_pps->i1_chroma_qp_index_offset);
302
303 /***************************************************************************/
304 /* initialize second_chroma_qp_index_offset to i1_chroma_qp_index_offset if */
305 /* second_chroma_qp_index_offset is not present in bit-ps_bitstrm */
306 /***************************************************************************/
307 ps_pps->i1_second_chroma_qp_index_offset =
308 ps_pps->i1_chroma_qp_index_offset;
309
310 ps_pps->u1_deblocking_filter_parameters_present_flag = ih264d_get_bit_h264(
311 ps_bitstrm);
312 COPYTHECONTEXT("PPS: deblocking_filter_control_present_flag",
313 ps_pps->u1_deblocking_filter_parameters_present_flag);
314 ps_pps->u1_constrained_intra_pred_flag = ih264d_get_bit_h264(ps_bitstrm);
315 COPYTHECONTEXT("PPS: constrained_intra_pred_flag",
316 ps_pps->u1_constrained_intra_pred_flag);
317 ps_pps->u1_redundant_pic_cnt_present_flag = ih264d_get_bit_h264(ps_bitstrm);
318 COPYTHECONTEXT("PPS: redundant_pic_cnt_present_flag",
319 ps_pps->u1_redundant_pic_cnt_present_flag);
320
321 /* High profile related syntax elements */
322 u1_more_data_flag = MORE_RBSP_DATA(ps_bitstrm);
323 if(u1_more_data_flag && (ps_pps->ps_sps->u1_profile_idc == HIGH_PROFILE_IDC))
324 {
325 /* read transform_8x8_mode_flag */
326 ps_pps->i4_transform_8x8_mode_flag = (WORD32)ih264d_get_bit_h264(
327 ps_bitstrm);
328
329 /* read pic_scaling_matrix_present_flag */
330 ps_pps->i4_pic_scaling_matrix_present_flag =
331 (WORD32)ih264d_get_bit_h264(ps_bitstrm);
332
333 if(ps_pps->i4_pic_scaling_matrix_present_flag)
334 {
335 /* read the scaling matrices */
336 for(i4_i = 0; i4_i < (6 + (ps_pps->i4_transform_8x8_mode_flag << 1)); i4_i++)
337 {
338 ps_pps->u1_pic_scaling_list_present_flag[i4_i] =
339 ih264d_get_bit_h264(ps_bitstrm);
340
341 if(ps_pps->u1_pic_scaling_list_present_flag[i4_i])
342 {
343 if(i4_i < 6)
344 {
345 ih264d_scaling_list(
346 ps_pps->i2_pic_scalinglist4x4[i4_i],
347 16,
348 &ps_pps->u1_pic_use_default_scaling_matrix_flag[i4_i],
349 ps_bitstrm);
350 }
351 else
352 {
353 ih264d_scaling_list(
354 ps_pps->i2_pic_scalinglist8x8[i4_i - 6],
355 64,
356 &ps_pps->u1_pic_use_default_scaling_matrix_flag[i4_i],
357 ps_bitstrm);
358 }
359 }
360 }
361 }
362
363 /* read second_chroma_qp_index_offset syntax element */
364 ps_pps->i1_second_chroma_qp_index_offset = ih264d_sev(
365 pu4_bitstrm_ofst, pu4_bitstrm_buf);
366
367 if((ps_pps->i1_second_chroma_qp_index_offset + 12) > 24)
368 return ERROR_INV_RANGE_QP_T;
369 }
370
371 /* In case bitstream read has exceeded the filled size, then
372 return an error */
373 if(ps_bitstrm->u4_ofst > ps_bitstrm->u4_max_ofst + 8)
374 {
375 return ERROR_INV_SPS_PPS_T;
376 }
377 ps_pps->u1_is_valid = TRUE;
378 ps_dec->ps_pps[ps_pps->u1_pic_parameter_set_id] = *ps_pps;
379 return OK;
380 }
381
382 /*!
383 **************************************************************************
384 * \if Function name : ih264d_parse_sps \endif
385 *
386 * \brief
387 * Decodes Sequence parameter set from the bitstream
388 *
389 * \return
390 * 0 on Success and Error code otherwise
391 **************************************************************************
392 */
ih264d_correct_level_idc(UWORD32 u4_level_idc,UWORD32 u4_total_mbs)393 UWORD32 ih264d_correct_level_idc(UWORD32 u4_level_idc, UWORD32 u4_total_mbs)
394 {
395 UWORD32 u4_max_mbs_allowed;
396
397 switch(u4_level_idc)
398 {
399 case H264_LEVEL_1_0:
400 u4_max_mbs_allowed = MAX_MBS_LEVEL_10;
401 break;
402 case H264_LEVEL_1_1:
403 u4_max_mbs_allowed = MAX_MBS_LEVEL_11;
404 break;
405 case H264_LEVEL_1_2:
406 u4_max_mbs_allowed = MAX_MBS_LEVEL_12;
407 break;
408 case H264_LEVEL_1_3:
409 u4_max_mbs_allowed = MAX_MBS_LEVEL_13;
410 break;
411 case H264_LEVEL_2_0:
412 u4_max_mbs_allowed = MAX_MBS_LEVEL_20;
413 break;
414 case H264_LEVEL_2_1:
415 u4_max_mbs_allowed = MAX_MBS_LEVEL_21;
416 break;
417 case H264_LEVEL_2_2:
418 u4_max_mbs_allowed = MAX_MBS_LEVEL_22;
419 break;
420 case H264_LEVEL_3_0:
421 u4_max_mbs_allowed = MAX_MBS_LEVEL_30;
422 break;
423 case H264_LEVEL_3_1:
424 u4_max_mbs_allowed = MAX_MBS_LEVEL_31;
425 break;
426 case H264_LEVEL_3_2:
427 u4_max_mbs_allowed = MAX_MBS_LEVEL_32;
428 break;
429 case H264_LEVEL_4_0:
430 u4_max_mbs_allowed = MAX_MBS_LEVEL_40;
431 break;
432 case H264_LEVEL_4_1:
433 u4_max_mbs_allowed = MAX_MBS_LEVEL_41;
434 break;
435 case H264_LEVEL_4_2:
436 u4_max_mbs_allowed = MAX_MBS_LEVEL_42;
437 break;
438 case H264_LEVEL_5_0:
439 u4_max_mbs_allowed = MAX_MBS_LEVEL_50;
440 break;
441 case H264_LEVEL_5_1:
442 default:
443 u4_max_mbs_allowed = MAX_MBS_LEVEL_51;
444 break;
445
446 }
447
448 /*correct of the level is incorrect*/
449 if(u4_total_mbs > u4_max_mbs_allowed)
450 {
451 if(u4_total_mbs > MAX_MBS_LEVEL_50)
452 u4_level_idc = H264_LEVEL_5_1;
453 else if(u4_total_mbs > MAX_MBS_LEVEL_42)
454 u4_level_idc = H264_LEVEL_5_0;
455 else if(u4_total_mbs > MAX_MBS_LEVEL_41)
456 u4_level_idc = H264_LEVEL_4_2;
457 else if(u4_total_mbs > MAX_MBS_LEVEL_40)
458 u4_level_idc = H264_LEVEL_4_1;
459 else if(u4_total_mbs > MAX_MBS_LEVEL_32)
460 u4_level_idc = H264_LEVEL_4_0;
461 else if(u4_total_mbs > MAX_MBS_LEVEL_31)
462 u4_level_idc = H264_LEVEL_3_2;
463 else if(u4_total_mbs > MAX_MBS_LEVEL_30)
464 u4_level_idc = H264_LEVEL_3_1;
465 else if(u4_total_mbs > MAX_MBS_LEVEL_21)
466 u4_level_idc = H264_LEVEL_3_0;
467 else if(u4_total_mbs > MAX_MBS_LEVEL_20)
468 u4_level_idc = H264_LEVEL_2_1;
469 else if(u4_total_mbs > MAX_MBS_LEVEL_10)
470 u4_level_idc = H264_LEVEL_2_0;
471 }
472
473 return (u4_level_idc);
474
475 }
ih264d_parse_sps(dec_struct_t * ps_dec,dec_bit_stream_t * ps_bitstrm)476 WORD32 ih264d_parse_sps(dec_struct_t *ps_dec, dec_bit_stream_t *ps_bitstrm)
477 {
478 UWORD8 i;
479 dec_seq_params_t *ps_seq = NULL;
480 UWORD8 u1_profile_idc, u1_level_idc, u1_seq_parameter_set_id;
481 UWORD16 i2_max_frm_num;
482 UWORD32 *pu4_bitstrm_buf = ps_bitstrm->pu4_buffer;
483 UWORD32 *pu4_bitstrm_ofst = &ps_bitstrm->u4_ofst;
484 UWORD8 u1_frm, uc_constraint_set0_flag, uc_constraint_set1_flag;
485
486 UWORD32 u4_temp;
487 WORD32 pic_height_in_map_units_minus1 = 0;
488 UWORD32 u2_pic_wd = 0;
489 UWORD32 u2_pic_ht = 0;
490 UWORD32 u2_frm_wd_y = 0;
491 UWORD32 u2_frm_ht_y = 0;
492 UWORD32 u2_frm_wd_uv = 0;
493 UWORD32 u2_frm_ht_uv = 0;
494 UWORD32 u2_crop_offset_y = 0;
495 UWORD32 u2_crop_offset_uv = 0;
496 WORD32 ret;
497 UWORD32 u4_num_reorder_frames;
498 /* High profile related syntax element */
499 WORD32 i4_i;
500 /* G050 */
501 UWORD8 u1_frame_cropping_flag, u1_frame_cropping_rect_left_ofst,
502 u1_frame_cropping_rect_right_ofst,
503 u1_frame_cropping_rect_top_ofst,
504 u1_frame_cropping_rect_bottom_ofst;
505 /* G050 */
506 /*--------------------------------------------------------------------*/
507 /* Decode seq_parameter_set_id and profile and level values */
508 /*--------------------------------------------------------------------*/
509 SWITCHONTRACE;
510 u1_profile_idc = ih264d_get_bits_h264(ps_bitstrm, 8);
511 COPYTHECONTEXT("SPS: profile_idc",u1_profile_idc);
512
513 /* G050 */
514 uc_constraint_set0_flag = ih264d_get_bit_h264(ps_bitstrm);
515 uc_constraint_set1_flag = ih264d_get_bit_h264(ps_bitstrm);
516 ih264d_get_bit_h264(ps_bitstrm);
517
518 /*****************************************************/
519 /* Read 5 bits for uc_constraint_set3_flag (1 bit) */
520 /* and reserved_zero_4bits (4 bits) - Sushant */
521 /*****************************************************/
522 ih264d_get_bits_h264(ps_bitstrm, 5);
523 /* G050 */
524
525 /* Check whether particular profile is suported or not */
526 /* Check whether particular profile is suported or not */
527 if((u1_profile_idc != MAIN_PROFILE_IDC) &&
528
529 (u1_profile_idc != BASE_PROFILE_IDC) &&
530
531 (u1_profile_idc != HIGH_PROFILE_IDC)
532
533 )
534 {
535
536 if((uc_constraint_set1_flag != 1) && (uc_constraint_set0_flag != 1))
537 {
538 if(NULL != ps_dec)
539 {
540 UWORD32 i4_error_code;
541 i4_error_code = ERROR_FEATURE_UNAVAIL;
542 return i4_error_code;
543 }
544 else
545 {
546 return (ERROR_FEATURE_UNAVAIL);
547 }
548 }
549 }
550
551 u1_level_idc = ih264d_get_bits_h264(ps_bitstrm, 8);
552
553
554
555 COPYTHECONTEXT("SPS: u4_level_idc",u1_level_idc);
556
557 u4_temp = ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf);
558 if(u4_temp & MASK_ERR_SEQ_SET_ID)
559 return ERROR_INV_SPS_PPS_T;
560 u1_seq_parameter_set_id = u4_temp;
561 COPYTHECONTEXT("SPS: seq_parameter_set_id",
562 u1_seq_parameter_set_id);
563
564 /*--------------------------------------------------------------------*/
565 /* Find an seq param entry in seqparam array of decStruct */
566 /*--------------------------------------------------------------------*/
567
568 ps_seq = ps_dec->pv_scratch_sps_pps;
569 *ps_seq = ps_dec->ps_sps[u1_seq_parameter_set_id];
570
571 if(NULL == ps_dec->ps_cur_sps)
572 ps_dec->ps_cur_sps = ps_seq;
573
574 if((3 == ps_dec->i4_header_decoded) && (ps_seq->u1_profile_idc != u1_profile_idc))
575 {
576 ps_dec->u1_res_changed = 1;
577 return IVD_RES_CHANGED;
578 }
579
580 if((3 == ps_dec->i4_header_decoded) && (ps_seq->u1_level_idc != u1_level_idc))
581 {
582 ps_dec->u1_res_changed = 1;
583 return IVD_RES_CHANGED;
584 }
585
586 ps_seq->u1_profile_idc = u1_profile_idc;
587 ps_seq->u1_level_idc = u1_level_idc;
588 ps_seq->u1_seq_parameter_set_id = u1_seq_parameter_set_id;
589
590 /*******************************************************************/
591 /* Initializations for high profile - Sushant */
592 /*******************************************************************/
593 ps_seq->i4_chroma_format_idc = 1;
594 ps_seq->i4_bit_depth_luma_minus8 = 0;
595 ps_seq->i4_bit_depth_chroma_minus8 = 0;
596 ps_seq->i4_qpprime_y_zero_transform_bypass_flag = 0;
597 ps_seq->i4_seq_scaling_matrix_present_flag = 0;
598 if(u1_profile_idc == HIGH_PROFILE_IDC)
599 {
600
601 /* reading chroma_format_idc */
602 ps_seq->i4_chroma_format_idc = ih264d_uev(pu4_bitstrm_ofst,
603 pu4_bitstrm_buf);
604
605 /* Monochrome is not supported */
606 if(ps_seq->i4_chroma_format_idc != 1)
607 {
608 return ERROR_INV_SPS_PPS_T;
609 }
610
611 /* reading bit_depth_luma_minus8 */
612 ps_seq->i4_bit_depth_luma_minus8 = ih264d_uev(pu4_bitstrm_ofst,
613 pu4_bitstrm_buf);
614
615 if(ps_seq->i4_bit_depth_luma_minus8 != 0)
616 {
617 return ERROR_INV_SPS_PPS_T;
618 }
619
620 /* reading bit_depth_chroma_minus8 */
621 ps_seq->i4_bit_depth_chroma_minus8 = ih264d_uev(pu4_bitstrm_ofst,
622 pu4_bitstrm_buf);
623
624 if(ps_seq->i4_bit_depth_chroma_minus8 != 0)
625 {
626 return ERROR_INV_SPS_PPS_T;
627 }
628
629 /* reading qpprime_y_zero_transform_bypass_flag */
630 ps_seq->i4_qpprime_y_zero_transform_bypass_flag =
631 (WORD32)ih264d_get_bit_h264(ps_bitstrm);
632
633 if(ps_seq->i4_qpprime_y_zero_transform_bypass_flag != 0)
634 {
635 return ERROR_INV_SPS_PPS_T;
636 }
637
638 /* reading seq_scaling_matrix_present_flag */
639 ps_seq->i4_seq_scaling_matrix_present_flag =
640 (WORD32)ih264d_get_bit_h264(ps_bitstrm);
641
642 if(ps_seq->i4_seq_scaling_matrix_present_flag)
643 {
644 for(i4_i = 0; i4_i < 8; i4_i++)
645 {
646 ps_seq->u1_seq_scaling_list_present_flag[i4_i] =
647 ih264d_get_bit_h264(ps_bitstrm);
648
649 /* initialize u1_use_default_scaling_matrix_flag[i4_i] to zero */
650 /* before calling scaling list */
651 ps_seq->u1_use_default_scaling_matrix_flag[i4_i] = 0;
652
653 if(ps_seq->u1_seq_scaling_list_present_flag[i4_i])
654 {
655 if(i4_i < 6)
656 {
657 ih264d_scaling_list(
658 ps_seq->i2_scalinglist4x4[i4_i],
659 16,
660 &ps_seq->u1_use_default_scaling_matrix_flag[i4_i],
661 ps_bitstrm);
662 }
663 else
664 {
665 ih264d_scaling_list(
666 ps_seq->i2_scalinglist8x8[i4_i - 6],
667 64,
668 &ps_seq->u1_use_default_scaling_matrix_flag[i4_i],
669 ps_bitstrm);
670 }
671 }
672 }
673 }
674 }
675 /*--------------------------------------------------------------------*/
676 /* Decode MaxFrameNum */
677 /*--------------------------------------------------------------------*/
678 u4_temp = 4 + ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf);
679 if(u4_temp > MAX_BITS_IN_FRAME_NUM)
680 {
681 return ERROR_INV_SPS_PPS_T;
682 }
683 ps_seq->u1_bits_in_frm_num = u4_temp;
684 COPYTHECONTEXT("SPS: log2_max_frame_num_minus4",
685 (ps_seq->u1_bits_in_frm_num - 4));
686
687 i2_max_frm_num = (1 << (ps_seq->u1_bits_in_frm_num));
688 ps_seq->u2_u4_max_pic_num_minus1 = i2_max_frm_num - 1;
689 /*--------------------------------------------------------------------*/
690 /* Decode picture order count and related values */
691 /*--------------------------------------------------------------------*/
692 u4_temp = ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf);
693
694 if(u4_temp > MAX_PIC_ORDER_CNT_TYPE)
695 {
696 return ERROR_INV_POC_TYPE_T;
697 }
698 ps_seq->u1_pic_order_cnt_type = u4_temp;
699 COPYTHECONTEXT("SPS: pic_order_cnt_type",ps_seq->u1_pic_order_cnt_type);
700
701 ps_seq->u1_num_ref_frames_in_pic_order_cnt_cycle = 1;
702 if(ps_seq->u1_pic_order_cnt_type == 0)
703 {
704 u4_temp = 4 + ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf);
705 if(u4_temp > MAX_BITS_IN_POC_LSB)
706 {
707 return ERROR_INV_SPS_PPS_T;
708 }
709 ps_seq->u1_log2_max_pic_order_cnt_lsb_minus = u4_temp;
710 ps_seq->i4_max_pic_order_cntLsb = (1 << u4_temp);
711 COPYTHECONTEXT("SPS: log2_max_pic_order_cnt_lsb_minus4",(u4_temp - 4));
712 }
713 else if(ps_seq->u1_pic_order_cnt_type == 1)
714 {
715 ps_seq->u1_delta_pic_order_always_zero_flag = ih264d_get_bit_h264(
716 ps_bitstrm);
717 COPYTHECONTEXT("SPS: delta_pic_order_always_zero_flag",
718 ps_seq->u1_delta_pic_order_always_zero_flag);
719
720 ps_seq->i4_ofst_for_non_ref_pic = ih264d_sev(pu4_bitstrm_ofst,
721 pu4_bitstrm_buf);
722 COPYTHECONTEXT("SPS: offset_for_non_ref_pic",
723 ps_seq->i4_ofst_for_non_ref_pic);
724
725 ps_seq->i4_ofst_for_top_to_bottom_field = ih264d_sev(
726 pu4_bitstrm_ofst, pu4_bitstrm_buf);
727 COPYTHECONTEXT("SPS: offset_for_top_to_bottom_field",
728 ps_seq->i4_ofst_for_top_to_bottom_field);
729
730 u4_temp = ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf);
731 if(u4_temp > 255)
732 return ERROR_INV_SPS_PPS_T;
733 ps_seq->u1_num_ref_frames_in_pic_order_cnt_cycle = u4_temp;
734 COPYTHECONTEXT("SPS: num_ref_frames_in_pic_order_cnt_cycle",
735 ps_seq->u1_num_ref_frames_in_pic_order_cnt_cycle);
736
737 for(i = 0; i < ps_seq->u1_num_ref_frames_in_pic_order_cnt_cycle; i++)
738 {
739 ps_seq->i4_ofst_for_ref_frame[i] = ih264d_sev(
740 pu4_bitstrm_ofst, pu4_bitstrm_buf);
741 COPYTHECONTEXT("SPS: offset_for_ref_frame",
742 ps_seq->i4_ofst_for_ref_frame[i]);
743 }
744 }
745
746 u4_temp = ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf);
747
748 if((u4_temp > H264_MAX_REF_PICS))
749 {
750 return ERROR_NUM_REF;
751 }
752
753 /* Compare with older num_ref_frames is header is already once */
754 if((3 == ps_dec->i4_header_decoded) && (ps_seq->u1_num_ref_frames != u4_temp))
755 {
756 ps_dec->u1_res_changed = 1;
757 return IVD_RES_CHANGED;
758 }
759
760 ps_seq->u1_num_ref_frames = u4_temp;
761 COPYTHECONTEXT("SPS: num_ref_frames",ps_seq->u1_num_ref_frames);
762
763 ps_seq->u1_gaps_in_frame_num_value_allowed_flag = ih264d_get_bit_h264(
764 ps_bitstrm);
765 COPYTHECONTEXT("SPS: gaps_in_frame_num_value_allowed_flag",
766 ps_seq->u1_gaps_in_frame_num_value_allowed_flag);
767
768 /*--------------------------------------------------------------------*/
769 /* Decode FrameWidth and FrameHeight and related values */
770 /*--------------------------------------------------------------------*/
771 ps_seq->u2_frm_wd_in_mbs = 1
772 + ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf);
773 COPYTHECONTEXT("SPS: pic_width_in_mbs_minus1",
774 ps_seq->u2_frm_wd_in_mbs - 1);
775 u2_pic_wd = (ps_seq->u2_frm_wd_in_mbs << 4);
776
777 pic_height_in_map_units_minus1 = ih264d_uev(pu4_bitstrm_ofst,
778 pu4_bitstrm_buf);
779 ps_seq->u2_frm_ht_in_mbs = 1 + pic_height_in_map_units_minus1;
780
781 u2_pic_ht = (ps_seq->u2_frm_ht_in_mbs << 4);
782
783 /*--------------------------------------------------------------------*/
784 /* Get the value of MaxMbAddress and Number of bits needed for it */
785 /*--------------------------------------------------------------------*/
786 ps_seq->u2_max_mb_addr = (ps_seq->u2_frm_wd_in_mbs
787 * ps_seq->u2_frm_ht_in_mbs) - 1;
788
789 ps_seq->u2_total_num_of_mbs = ps_seq->u2_max_mb_addr + 1;
790
791 ps_seq->u1_level_idc = ih264d_correct_level_idc(
792 u1_level_idc, ps_seq->u2_total_num_of_mbs);
793
794 u1_frm = ih264d_get_bit_h264(ps_bitstrm);
795 ps_seq->u1_frame_mbs_only_flag = u1_frm;
796
797 COPYTHECONTEXT("SPS: frame_mbs_only_flag", u1_frm);
798
799 if(!u1_frm)
800 {
801 u2_pic_ht <<= 1;
802 ps_seq->u1_mb_aff_flag = ih264d_get_bit_h264(ps_bitstrm);
803 COPYTHECONTEXT("SPS: mb_adaptive_frame_field_flag",
804 ps_seq->u1_mb_aff_flag);
805
806 }
807 else
808 ps_seq->u1_mb_aff_flag = 0;
809
810 ps_seq->u1_direct_8x8_inference_flag = ih264d_get_bit_h264(ps_bitstrm);
811
812 COPYTHECONTEXT("SPS: direct_8x8_inference_flag",
813 ps_seq->u1_direct_8x8_inference_flag);
814
815 /* G050 */
816 u1_frame_cropping_flag = ih264d_get_bit_h264(ps_bitstrm);
817 COPYTHECONTEXT("SPS: frame_cropping_flag",u1_frame_cropping_flag);
818
819 if(u1_frame_cropping_flag)
820 {
821 u1_frame_cropping_rect_left_ofst = ih264d_uev(pu4_bitstrm_ofst,
822 pu4_bitstrm_buf);
823 COPYTHECONTEXT("SPS: frame_cropping_rect_left_offset",
824 u1_frame_cropping_rect_left_ofst);
825 u1_frame_cropping_rect_right_ofst = ih264d_uev(pu4_bitstrm_ofst,
826 pu4_bitstrm_buf);
827 COPYTHECONTEXT("SPS: frame_cropping_rect_right_offset",
828 u1_frame_cropping_rect_right_ofst);
829 u1_frame_cropping_rect_top_ofst = ih264d_uev(pu4_bitstrm_ofst,
830 pu4_bitstrm_buf);
831 COPYTHECONTEXT("SPS: frame_cropping_rect_top_offset",
832 u1_frame_cropping_rect_top_ofst);
833 u1_frame_cropping_rect_bottom_ofst = ih264d_uev(pu4_bitstrm_ofst,
834 pu4_bitstrm_buf);
835 COPYTHECONTEXT("SPS: frame_cropping_rect_bottom_offset",
836 u1_frame_cropping_rect_bottom_ofst);
837 }
838 /* G050 */
839
840 ps_seq->u1_vui_parameters_present_flag = ih264d_get_bit_h264(ps_bitstrm);
841 COPYTHECONTEXT("SPS: vui_parameters_present_flag",
842 ps_seq->u1_vui_parameters_present_flag);
843
844 u2_frm_wd_y = u2_pic_wd + (UWORD8)(PAD_LEN_Y_H << 1);
845 if(1 == ps_dec->u4_share_disp_buf)
846 {
847 if(ps_dec->u4_app_disp_width > u2_frm_wd_y)
848 u2_frm_wd_y = ps_dec->u4_app_disp_width;
849 }
850
851 u2_frm_ht_y = u2_pic_ht + (UWORD8)(PAD_LEN_Y_V << 2);
852 u2_frm_wd_uv = u2_pic_wd + (UWORD8)(PAD_LEN_UV_H << 2);
853 u2_frm_wd_uv = MAX(u2_frm_wd_uv, u2_frm_wd_y);
854
855 u2_frm_ht_uv = (u2_pic_ht >> 1) + (UWORD8)(PAD_LEN_UV_V << 2);
856 u2_frm_ht_uv = MAX(u2_frm_ht_uv, (u2_frm_ht_y >> 1));
857
858
859 /* Calculate display picture width, height and start u4_ofst from YUV420 */
860 /* pictute buffers as per cropping information parsed above */
861 {
862 UWORD16 u2_rgt_ofst = 0;
863 UWORD16 u2_lft_ofst = 0;
864 UWORD16 u2_top_ofst = 0;
865 UWORD16 u2_btm_ofst = 0;
866 UWORD8 u1_frm_mbs_flag;
867 UWORD8 u1_vert_mult_factor;
868 WORD32 i4_cropped_ht, i4_cropped_wd;
869
870 if(u1_frame_cropping_flag)
871 {
872 /* Calculate right and left u4_ofst for cropped picture */
873 u2_rgt_ofst = u1_frame_cropping_rect_right_ofst << 1;
874 u2_lft_ofst = u1_frame_cropping_rect_left_ofst << 1;
875
876 /* Know frame MBs only u4_flag */
877 u1_frm_mbs_flag = (1 == ps_seq->u1_frame_mbs_only_flag);
878
879 /* Simplify the vertical u4_ofst calculation from field/frame */
880 u1_vert_mult_factor = (2 - u1_frm_mbs_flag);
881
882 /* Calculate bottom and top u4_ofst for cropped picture */
883 u2_btm_ofst = (u1_frame_cropping_rect_bottom_ofst
884 << u1_vert_mult_factor);
885 u2_top_ofst = (u1_frame_cropping_rect_top_ofst
886 << u1_vert_mult_factor);
887 }
888
889 /* Calculate u4_ofst from start of YUV 420 picture buffer to start of*/
890 /* cropped picture buffer */
891 u2_crop_offset_y = (u2_frm_wd_y * u2_top_ofst) + (u2_lft_ofst);
892 u2_crop_offset_uv = (u2_frm_wd_uv * (u2_top_ofst >> 1))
893 + (u2_lft_ofst >> 1) * YUV420SP_FACTOR;
894 /* Calculate the display picture width and height based on crop */
895 /* information */
896 i4_cropped_ht = u2_pic_ht - (u2_btm_ofst + u2_top_ofst);
897 i4_cropped_wd = u2_pic_wd - (u2_rgt_ofst + u2_lft_ofst);
898
899 if((i4_cropped_ht < MB_SIZE) || (i4_cropped_wd < MB_SIZE))
900 {
901 return ERROR_INV_SPS_PPS_T;
902 }
903
904 if((3 == ps_dec->i4_header_decoded) && (ps_dec->u2_pic_wd != u2_pic_wd))
905 {
906 ps_dec->u1_res_changed = 1;
907 return IVD_RES_CHANGED;
908 }
909 if((3 == ps_dec->i4_header_decoded) && (ps_dec->u2_pic_ht != u2_pic_ht))
910 {
911 ps_dec->u1_res_changed = 1;
912 return IVD_RES_CHANGED;
913 }
914
915 /* Check for unsupported resolutions */
916 if((u2_pic_wd > H264_MAX_FRAME_WIDTH) || (u2_pic_ht > H264_MAX_FRAME_HEIGHT))
917 {
918 return IVD_STREAM_WIDTH_HEIGHT_NOT_SUPPORTED;
919 }
920
921 ps_dec->u2_disp_height = i4_cropped_ht;
922
923 ps_dec->u2_disp_width = i4_cropped_wd;
924
925 }
926
927 /* Backup u4_num_reorder_frames if header is already decoded */
928 if((3 == ps_dec->i4_header_decoded) &&
929 (1 == ps_seq->u1_vui_parameters_present_flag) &&
930 (1 == ps_seq->s_vui.u1_bitstream_restriction_flag))
931 {
932 u4_num_reorder_frames = ps_seq->s_vui.u4_num_reorder_frames;
933 }
934 else
935 {
936 u4_num_reorder_frames = -1;
937 }
938 if(1 == ps_seq->u1_vui_parameters_present_flag)
939 {
940 ret = ih264d_parse_vui_parametres(&ps_seq->s_vui, ps_bitstrm);
941 if(ret != OK)
942 return ret;
943 }
944
945 /* Compare older u4_num_reorder_frames with the new one if header is already decoded */
946 if((3 == ps_dec->i4_header_decoded) &&
947 (-1 != (WORD32)u4_num_reorder_frames) &&
948 (1 == ps_seq->u1_vui_parameters_present_flag) &&
949 (1 == ps_seq->s_vui.u1_bitstream_restriction_flag) &&
950 (ps_seq->s_vui.u4_num_reorder_frames != u4_num_reorder_frames))
951 {
952 ps_dec->u1_res_changed = 1;
953 return IVD_RES_CHANGED;
954 }
955
956 ps_dec->u2_pic_wd = u2_pic_wd;
957 ps_dec->u2_pic_ht = u2_pic_ht;
958
959 /* Determining the Width and Height of Frame from that of Picture */
960 ps_dec->u2_frm_wd_y = u2_frm_wd_y;
961 ps_dec->u2_frm_ht_y = u2_frm_ht_y;
962
963 ps_dec->u2_frm_wd_uv = u2_frm_wd_uv;
964 ps_dec->u2_frm_ht_uv = u2_frm_ht_uv;
965 ps_dec->s_pad_mgr.u1_pad_len_y_v = (UWORD8)(PAD_LEN_Y_V << (1 - u1_frm));
966 ps_dec->s_pad_mgr.u1_pad_len_cr_v = (UWORD8)(PAD_LEN_UV_V << (1 - u1_frm));
967
968 ps_dec->u2_frm_wd_in_mbs = ps_seq->u2_frm_wd_in_mbs;
969 ps_dec->u2_frm_ht_in_mbs = ps_seq->u2_frm_ht_in_mbs;
970
971 ps_dec->u2_crop_offset_y = u2_crop_offset_y;
972 ps_dec->u2_crop_offset_uv = u2_crop_offset_uv;
973
974 /* In case bitstream read has exceeded the filled size, then
975 return an error */
976 if(ps_bitstrm->u4_ofst > ps_bitstrm->u4_max_ofst)
977 {
978 return ERROR_INV_SPS_PPS_T;
979 }
980 ps_seq->u1_is_valid = TRUE;
981 ps_dec->ps_sps[u1_seq_parameter_set_id] = *ps_seq;
982
983 return OK;
984 }
985
986 /*!
987 **************************************************************************
988 * \if Function name : ih264d_parse_end_of_sequence \endif
989 *
990 * \brief
991 * Decodes End of Sequence.
992 *
993 * \param ps_bitstrm : Pointer to bit ps_bitstrm containing the NAL unit
994 *
995 * \return
996 * 0 on Success and error code otherwise
997 **************************************************************************
998 */
ih264d_parse_end_of_sequence(dec_struct_t * ps_dec)999 WORD32 ih264d_parse_end_of_sequence(dec_struct_t * ps_dec)
1000 {
1001 WORD32 ret;
1002
1003 ret = ih264d_end_of_pic_processing(ps_dec);
1004 return ret;
1005 }
1006
1007 /*!
1008 **************************************************************************
1009 * \if Function name : AcessUnitDelimiterRbsp \endif
1010 *
1011 * \brief
1012 * Decodes AcessUnitDelimiterRbsp.
1013 *
1014 * \param ps_bitstrm : Pointer to bit ps_bitstrm containing the NAL unit
1015 *
1016 * \return
1017 * 0 on Success and error code otherwise
1018 **************************************************************************
1019 */
1020
ih264d_access_unit_delimiter_rbsp(dec_struct_t * ps_dec)1021 WORD32 ih264d_access_unit_delimiter_rbsp(dec_struct_t * ps_dec)
1022 {
1023 UWORD8 u1_primary_pic_type;
1024 u1_primary_pic_type = ih264d_get_bits_h264(ps_dec->ps_bitstrm, 3);
1025 switch(u1_primary_pic_type)
1026 {
1027 case I_PIC:
1028 case SI_PIC:
1029 case ISI_PIC:
1030 ps_dec->ps_dec_err_status->u1_pic_aud_i = PIC_TYPE_I;
1031 break;
1032 default:
1033 ps_dec->ps_dec_err_status->u1_pic_aud_i = PIC_TYPE_UNKNOWN;
1034 }
1035 return (0);
1036 }
1037 /*!
1038 **************************************************************************
1039 * \if Function name : ih264d_parse_nal_unit \endif
1040 *
1041 * \brief
1042 * Decodes NAL unit
1043 *
1044 * \return
1045 * 0 on Success and error code otherwise
1046 **************************************************************************
1047 */
1048
ih264d_parse_nal_unit(iv_obj_t * dec_hdl,ivd_video_decode_op_t * ps_dec_op,UWORD8 * pu1_buf,UWORD32 u4_length)1049 WORD32 ih264d_parse_nal_unit(iv_obj_t *dec_hdl,
1050 ivd_video_decode_op_t *ps_dec_op,
1051 UWORD8 *pu1_buf,
1052 UWORD32 u4_length)
1053 {
1054
1055 dec_bit_stream_t *ps_bitstrm;
1056
1057
1058 dec_struct_t *ps_dec = (dec_struct_t *)dec_hdl->pv_codec_handle;
1059 ivd_video_decode_ip_t *ps_dec_in =
1060 (ivd_video_decode_ip_t *)ps_dec->pv_dec_in;
1061 dec_slice_params_t * ps_cur_slice = ps_dec->ps_cur_slice;
1062 UWORD8 u1_first_byte, u1_nal_ref_idc;
1063 UWORD8 u1_nal_unit_type;
1064 WORD32 i_status = OK;
1065 ps_bitstrm = ps_dec->ps_bitstrm;
1066
1067 if(pu1_buf)
1068 {
1069 if(u4_length)
1070 {
1071 ps_dec_op->u4_frame_decoded_flag = 0;
1072 ih264d_process_nal_unit(ps_dec->ps_bitstrm, pu1_buf,
1073 u4_length);
1074
1075 SWITCHOFFTRACE;
1076 u1_first_byte = ih264d_get_bits_h264(ps_bitstrm, 8);
1077
1078 if(NAL_FORBIDDEN_BIT(u1_first_byte))
1079 {
1080 H264_DEC_DEBUG_PRINT("\nForbidden bit set in Nal Unit, Let's try\n");
1081 }
1082 u1_nal_unit_type = NAL_UNIT_TYPE(u1_first_byte);
1083 // if any other nal unit other than slice nal is encountered in between a
1084 // frame break out of loop without consuming header
1085 if((ps_dec->u2_total_mbs_coded != 0) && (u1_nal_unit_type > IDR_SLICE_NAL))
1086 {
1087 return ERROR_INCOMPLETE_FRAME;
1088 }
1089 ps_dec->u1_nal_unit_type = u1_nal_unit_type;
1090 u1_nal_ref_idc = (UWORD8)(NAL_REF_IDC(u1_first_byte));
1091 //Skip all NALUs if SPS and PPS are not decoded
1092 switch(u1_nal_unit_type)
1093 {
1094 case SLICE_DATA_PARTITION_A_NAL:
1095 case SLICE_DATA_PARTITION_B_NAL:
1096 case SLICE_DATA_PARTITION_C_NAL:
1097 if(!ps_dec->i4_decode_header)
1098 ih264d_parse_slice_partition(ps_dec, ps_bitstrm);
1099
1100 break;
1101
1102 case IDR_SLICE_NAL:
1103 case SLICE_NAL:
1104
1105 /* ! */
1106 DEBUG_THREADS_PRINTF("Decoding a slice NAL\n");
1107 if(!ps_dec->i4_decode_header)
1108 {
1109 if(ps_dec->i4_header_decoded == 3)
1110 {
1111 /* ! */
1112 ps_dec->u4_slice_start_code_found = 1;
1113
1114 ih264d_rbsp_to_sodb(ps_dec->ps_bitstrm);
1115
1116 i_status = ih264d_parse_decode_slice(
1117 (UWORD8)(u1_nal_unit_type
1118 == IDR_SLICE_NAL),
1119 u1_nal_ref_idc, ps_dec);
1120
1121 if((ps_dec->u4_first_slice_in_pic != 0)&&
1122 ((ps_dec->ps_dec_err_status->u1_err_flag & REJECT_CUR_PIC) == 0))
1123 {
1124 /* if the first slice header was not valid set to 1 */
1125 ps_dec->u4_first_slice_in_pic = 1;
1126 }
1127
1128 if(i_status != OK)
1129 {
1130 return i_status;
1131 }
1132 }
1133 else
1134 {
1135 H264_DEC_DEBUG_PRINT(
1136 "\nSlice NAL Supplied but no header has been supplied\n");
1137 }
1138 }
1139 break;
1140
1141 case SEI_NAL:
1142 if(!ps_dec->i4_decode_header)
1143 {
1144 ih264d_rbsp_to_sodb(ps_dec->ps_bitstrm);
1145 i_status = ih264d_parse_sei_message(ps_dec, ps_bitstrm);
1146 if(i_status != OK)
1147 return i_status;
1148 ih264d_parse_sei(ps_dec, ps_bitstrm);
1149 }
1150 break;
1151 case SEQ_PARAM_NAL:
1152 /* ! */
1153 ih264d_rbsp_to_sodb(ps_dec->ps_bitstrm);
1154 i_status = ih264d_parse_sps(ps_dec, ps_bitstrm);
1155 if(i_status == ERROR_INV_SPS_PPS_T)
1156 return i_status;
1157 if(!i_status)
1158 ps_dec->i4_header_decoded |= 0x1;
1159 break;
1160
1161 case PIC_PARAM_NAL:
1162 /* ! */
1163 ih264d_rbsp_to_sodb(ps_dec->ps_bitstrm);
1164 i_status = ih264d_parse_pps(ps_dec, ps_bitstrm);
1165 if(i_status == ERROR_INV_SPS_PPS_T)
1166 return i_status;
1167 if(!i_status)
1168 ps_dec->i4_header_decoded |= 0x2;
1169 break;
1170 case ACCESS_UNIT_DELIMITER_RBSP:
1171 if(!ps_dec->i4_decode_header)
1172 {
1173 ih264d_access_unit_delimiter_rbsp(ps_dec);
1174 }
1175 break;
1176 //Let us ignore the END_OF_SEQ_RBSP NAL and decode even after this NAL
1177 case END_OF_STREAM_RBSP:
1178 if(!ps_dec->i4_decode_header)
1179 {
1180 ih264d_parse_end_of_stream(ps_dec);
1181 }
1182 break;
1183 case FILLER_DATA_NAL:
1184 if(!ps_dec->i4_decode_header)
1185 {
1186 ih264d_parse_filler_data(ps_dec, ps_bitstrm);
1187 }
1188 break;
1189 default:
1190 H264_DEC_DEBUG_PRINT("\nUnknown NAL type %d\n", u1_nal_unit_type);
1191 break;
1192 }
1193
1194 }
1195
1196 }
1197
1198 return i_status;
1199
1200 }
1201
1202