1 /* ------------------------------------------------------------------ 2 * Copyright (C) 1998-2009 PacketVideo 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either 13 * express or implied. 14 * See the License for the specific language governing permissions 15 * and limitations under the License. 16 * ------------------------------------------------------------------- 17 */ 18 #include "avcdec_lib.h" 19 #include "avcdec_bitstream.h" 20 #include "avcdec_api.h" 21 22 /** see subclause 7.4.2.1 */ 23 AVCDec_Status DecodeSPS(AVCDecObject *decvid, AVCDecBitstream *stream) 24 { 25 AVCDec_Status status = AVCDEC_SUCCESS; 26 AVCSeqParamSet *seqParam; 27 uint temp; 28 int i; 29 uint profile_idc, constrained_set0_flag, constrained_set1_flag, constrained_set2_flag; 30 uint level_idc, seq_parameter_set_id; 31 void *userData = decvid->avcHandle->userData; 32 AVCHandle *avcHandle = decvid->avcHandle; 33 34 DEBUG_LOG(userData, AVC_LOGTYPE_INFO, "DecodeSPS", -1, -1); 35 36 BitstreamReadBits(stream, 8, &profile_idc); 37 BitstreamRead1Bit(stream, &constrained_set0_flag); 38 // if (profile_idc != 66 && constrained_set0_flag != 1) 39 // { 40 // return AVCDEC_FAIL; 41 // } 42 BitstreamRead1Bit(stream, &constrained_set1_flag); 43 BitstreamRead1Bit(stream, &constrained_set2_flag); 44 BitstreamReadBits(stream, 5, &temp); 45 BitstreamReadBits(stream, 8, &level_idc); 46 if (level_idc > 51) 47 { 48 return AVCDEC_FAIL; 49 } 50 if (mapLev2Idx[level_idc] == 255) 51 { 52 return AVCDEC_FAIL; 53 } 54 ue_v(stream, &seq_parameter_set_id); 55 56 if (seq_parameter_set_id > 31) 57 { 58 return AVCDEC_FAIL; 59 } 60 61 /* Allocate sequence param set for seqParams[seq_parameter_set_id]. */ 62 if (decvid->seqParams[seq_parameter_set_id] == NULL) /* allocate seqParams[id] */ 63 { 64 decvid->seqParams[seq_parameter_set_id] = 65 (AVCSeqParamSet*) avcHandle->CBAVC_Malloc(userData, sizeof(AVCSeqParamSet), DEFAULT_ATTR); 66 67 if (decvid->seqParams[seq_parameter_set_id] == NULL) 68 { 69 return AVCDEC_MEMORY_FAIL; 70 } 71 } 72 73 DEBUG_LOG(userData, AVC_LOGTYPE_INFO, "done alloc seqParams", -1, -1); 74 75 seqParam = decvid->seqParams[seq_parameter_set_id]; 76 77 seqParam->profile_idc = profile_idc; 78 seqParam->constrained_set0_flag = constrained_set0_flag; 79 seqParam->constrained_set1_flag = constrained_set1_flag; 80 seqParam->constrained_set2_flag = constrained_set2_flag; 81 seqParam->level_idc = level_idc; 82 seqParam->seq_parameter_set_id = seq_parameter_set_id; 83 84 /* continue decoding SPS */ 85 ue_v(stream, &(seqParam->log2_max_frame_num_minus4)); 86 87 if (seqParam->log2_max_frame_num_minus4 > 12) 88 { 89 return AVCDEC_FAIL; 90 } 91 92 ue_v(stream, &(seqParam->pic_order_cnt_type)); 93 94 DEBUG_LOG(userData, AVC_LOGTYPE_INFO, "check point 1", seqParam->log2_max_frame_num_minus4, seqParam->pic_order_cnt_type); 95 96 if (seqParam->pic_order_cnt_type == 0) 97 { 98 ue_v(stream, &(seqParam->log2_max_pic_order_cnt_lsb_minus4)); 99 } 100 else if (seqParam->pic_order_cnt_type == 1) 101 { // MC_CHECK 102 BitstreamRead1Bit(stream, (uint*)&(seqParam->delta_pic_order_always_zero_flag)); 103 se_v32bit(stream, &(seqParam->offset_for_non_ref_pic)); 104 se_v32bit(stream, &(seqParam->offset_for_top_to_bottom_field)); 105 ue_v(stream, &(seqParam->num_ref_frames_in_pic_order_cnt_cycle)); 106 107 for (i = 0; i < (int)(seqParam->num_ref_frames_in_pic_order_cnt_cycle); i++) 108 { 109 se_v32bit(stream, &(seqParam->offset_for_ref_frame[i])); 110 } 111 } 112 113 ue_v(stream, &(seqParam->num_ref_frames)); 114 115 if (seqParam->num_ref_frames > 16) 116 { 117 return AVCDEC_FAIL; 118 } 119 120 DEBUG_LOG(userData, AVC_LOGTYPE_INFO, "check point 2", seqParam->num_ref_frames, -1); 121 122 BitstreamRead1Bit(stream, (uint*)&(seqParam->gaps_in_frame_num_value_allowed_flag)); 123 ue_v(stream, &(seqParam->pic_width_in_mbs_minus1)); 124 125 DEBUG_LOG(userData, AVC_LOGTYPE_INFO, "picwidth", seqParam->pic_width_in_mbs_minus1, -1); 126 127 ue_v(stream, &(seqParam->pic_height_in_map_units_minus1)); 128 129 DEBUG_LOG(userData, AVC_LOGTYPE_INFO, "picwidth", seqParam->pic_height_in_map_units_minus1, -1); 130 131 BitstreamRead1Bit(stream, (uint*)&(seqParam->frame_mbs_only_flag)); 132 133 seqParam->mb_adaptive_frame_field_flag = 0; /* default value */ 134 if (!seqParam->frame_mbs_only_flag) 135 { 136 BitstreamRead1Bit(stream, (uint*)&(seqParam->mb_adaptive_frame_field_flag)); 137 } 138 139 DEBUG_LOG(userData, AVC_LOGTYPE_INFO, "check point 3", seqParam->frame_mbs_only_flag, -1); 140 141 BitstreamRead1Bit(stream, (uint*)&(seqParam->direct_8x8_inference_flag)); 142 143 DEBUG_LOG(userData, AVC_LOGTYPE_INFO, "check point 4", seqParam->direct_8x8_inference_flag, -1); 144 145 BitstreamRead1Bit(stream, (uint*)&(seqParam->frame_cropping_flag)); 146 seqParam->frame_crop_left_offset = 0; /* default value */ 147 seqParam->frame_crop_right_offset = 0;/* default value */ 148 seqParam->frame_crop_top_offset = 0;/* default value */ 149 seqParam->frame_crop_bottom_offset = 0;/* default value */ 150 if (seqParam->frame_cropping_flag) 151 { 152 ue_v(stream, &(seqParam->frame_crop_left_offset)); 153 ue_v(stream, &(seqParam->frame_crop_right_offset)); 154 ue_v(stream, &(seqParam->frame_crop_top_offset)); 155 ue_v(stream, &(seqParam->frame_crop_bottom_offset)); 156 } 157 158 DEBUG_LOG(userData, AVC_LOGTYPE_INFO, "check point 5", seqParam->frame_cropping_flag, -1); 159 160 BitstreamRead1Bit(stream, (uint*)&(seqParam->vui_parameters_present_flag)); 161 if (seqParam->vui_parameters_present_flag) 162 { 163 status = vui_parameters(decvid, stream, seqParam); 164 if (status != AVCDEC_SUCCESS) 165 { 166 return AVCDEC_FAIL; 167 } 168 } 169 170 return status; 171 } 172 173 174 AVCDec_Status vui_parameters(AVCDecObject *decvid, AVCDecBitstream *stream, AVCSeqParamSet *currSPS) 175 { 176 uint temp; 177 uint temp32; 178 uint aspect_ratio_idc, overscan_appopriate_flag, video_format, video_full_range_flag; 179 /* aspect_ratio_info_present_flag */ 180 BitstreamRead1Bit(stream, &temp); 181 if (temp) 182 { 183 BitstreamReadBits(stream, 8, &aspect_ratio_idc); 184 if (aspect_ratio_idc == 255) 185 { 186 /* sar_width */ 187 BitstreamReadBits(stream, 16, &temp); 188 /* sar_height */ 189 BitstreamReadBits(stream, 16, &temp); 190 } 191 } 192 /* overscan_info_present */ 193 BitstreamRead1Bit(stream, &temp); 194 if (temp) 195 { 196 BitstreamRead1Bit(stream, &overscan_appopriate_flag); 197 } 198 /* video_signal_type_present_flag */ 199 BitstreamRead1Bit(stream, &temp); 200 if (temp) 201 { 202 BitstreamReadBits(stream, 3, &video_format); 203 BitstreamRead1Bit(stream, &video_full_range_flag); 204 /* colour_description_present_flag */ 205 BitstreamRead1Bit(stream, &temp); 206 if (temp) 207 { 208 /* colour_primaries */ 209 BitstreamReadBits(stream, 8, &temp); 210 /* transfer_characteristics */ 211 BitstreamReadBits(stream, 8, &temp); 212 /* matrix coefficients */ 213 BitstreamReadBits(stream, 8, &temp); 214 } 215 } 216 /* chroma_loc_info_present_flag */ 217 BitstreamRead1Bit(stream, &temp); 218 if (temp) 219 { 220 /* chroma_sample_loc_type_top_field */ 221 ue_v(stream, &temp); 222 /* chroma_sample_loc_type_bottom_field */ 223 ue_v(stream, &temp); 224 } 225 226 /* timing_info_present_flag*/ 227 BitstreamRead1Bit(stream, &temp); 228 if (temp) 229 { 230 /* num_unit_in_tick*/ 231 BitstreamReadBits(stream, 32, &temp32); 232 /* time_scale */ 233 BitstreamReadBits(stream, 32, &temp32); 234 /* fixed_frame_rate_flag */ 235 BitstreamRead1Bit(stream, &temp); 236 } 237 238 /* nal_hrd_parameters_present_flag */ 239 BitstreamRead1Bit(stream, &temp); 240 currSPS->vui_parameters.nal_hrd_parameters_present_flag = temp; 241 if (temp) 242 { 243 hrd_parameters(decvid, stream, &(currSPS->vui_parameters.nal_hrd_parameters)); 244 } 245 /* vcl_hrd_parameters_present_flag*/ 246 BitstreamRead1Bit(stream, &temp); 247 currSPS->vui_parameters.vcl_hrd_parameters_present_flag = temp; 248 if (temp) 249 { 250 hrd_parameters(decvid, stream, &(currSPS->vui_parameters.vcl_hrd_parameters)); 251 } 252 if (currSPS->vui_parameters.nal_hrd_parameters_present_flag || currSPS->vui_parameters.vcl_hrd_parameters_present_flag) 253 { 254 /* low_delay_hrd_flag */ 255 BitstreamRead1Bit(stream, &temp); 256 } 257 /* pic_struct_present_flag */ 258 BitstreamRead1Bit(stream, &temp); 259 currSPS->vui_parameters.pic_struct_present_flag = temp; 260 /* bitstream_restriction_flag */ 261 BitstreamRead1Bit(stream, &temp); 262 if (temp) 263 { 264 /* motion_vectors_over_pic_boundaries_flag */ 265 BitstreamRead1Bit(stream, &temp); 266 /* max_bytes_per_pic_denom */ 267 ue_v(stream, &temp); 268 /* max_bits_per_mb_denom */ 269 ue_v(stream, &temp); 270 /* log2_max_mv_length_horizontal */ 271 ue_v(stream, &temp); 272 /* log2_max_mv_length_vertical */ 273 ue_v(stream, &temp); 274 /* num_reorder_frames */ 275 ue_v(stream, &temp); 276 /* max_dec_frame_buffering */ 277 ue_v(stream, &temp); 278 } 279 return AVCDEC_SUCCESS; 280 } 281 AVCDec_Status hrd_parameters(AVCDecObject *decvid, AVCDecBitstream *stream, AVCHRDParams *HRDParam) 282 { 283 OSCL_UNUSED_ARG(decvid); 284 uint temp; 285 uint cpb_cnt_minus1; 286 uint i; 287 ue_v(stream, &cpb_cnt_minus1); 288 HRDParam->cpb_cnt_minus1 = cpb_cnt_minus1; 289 /* bit_rate_scale */ 290 BitstreamReadBits(stream, 4, &temp); 291 /* cpb_size_scale */ 292 BitstreamReadBits(stream, 4, &temp); 293 for (i = 0; i <= cpb_cnt_minus1; i++) 294 { 295 /* bit_rate_value_minus1[i] */ 296 ue_v(stream, &temp); 297 /* cpb_size_value_minus1[i] */ 298 ue_v(stream, &temp); 299 /* cbr_flag[i] */ 300 ue_v(stream, &temp); 301 } 302 /* initial_cpb_removal_delay_length_minus1 */ 303 BitstreamReadBits(stream, 5, &temp); 304 /* cpb_removal_delay_length_minus1 */ 305 BitstreamReadBits(stream, 5, &temp); 306 HRDParam->cpb_removal_delay_length_minus1 = temp; 307 /* dpb_output_delay_length_minus1 */ 308 BitstreamReadBits(stream, 5, &temp); 309 HRDParam->dpb_output_delay_length_minus1 = temp; 310 /* time_offset_length */ 311 BitstreamReadBits(stream, 5, &temp); 312 HRDParam->time_offset_length = temp; 313 return AVCDEC_SUCCESS; 314 } 315 316 317 /** see subclause 7.4.2.2 */ 318 AVCDec_Status DecodePPS(AVCDecObject *decvid, AVCCommonObj *video, AVCDecBitstream *stream) 319 { 320 AVCPicParamSet *picParam; 321 AVCDec_Status status; 322 int i, iGroup, numBits; 323 int PicWidthInMbs, PicHeightInMapUnits, PicSizeInMapUnits; 324 uint pic_parameter_set_id, seq_parameter_set_id; 325 void *userData = decvid->avcHandle->userData; 326 AVCHandle *avcHandle = decvid->avcHandle; 327 328 ue_v(stream, &pic_parameter_set_id); 329 if (pic_parameter_set_id > 255) 330 { 331 return AVCDEC_FAIL; 332 } 333 334 ue_v(stream, &seq_parameter_set_id); 335 336 if (seq_parameter_set_id > 31) 337 { 338 return AVCDEC_FAIL; 339 } 340 341 /* 2.1 if picParams[pic_param_set_id] is NULL, allocate it. */ 342 if (decvid->picParams[pic_parameter_set_id] == NULL) 343 { 344 decvid->picParams[pic_parameter_set_id] = 345 (AVCPicParamSet*)avcHandle->CBAVC_Malloc(userData, sizeof(AVCPicParamSet), DEFAULT_ATTR); 346 if (decvid->picParams[pic_parameter_set_id] == NULL) 347 { 348 return AVCDEC_MEMORY_FAIL; 349 } 350 351 decvid->picParams[pic_parameter_set_id]->slice_group_id = NULL; 352 } 353 354 video->currPicParams = picParam = decvid->picParams[pic_parameter_set_id]; 355 picParam->seq_parameter_set_id = seq_parameter_set_id; 356 picParam->pic_parameter_set_id = pic_parameter_set_id; 357 358 BitstreamRead1Bit(stream, (uint*)&(picParam->entropy_coding_mode_flag)); 359 if (picParam->entropy_coding_mode_flag) 360 { 361 status = AVCDEC_FAIL; 362 goto clean_up; 363 } 364 BitstreamRead1Bit(stream, (uint*)&(picParam->pic_order_present_flag)); 365 ue_v(stream, &(picParam->num_slice_groups_minus1)); 366 367 if (picParam->num_slice_groups_minus1 > MAX_NUM_SLICE_GROUP - 1) 368 { 369 status = AVCDEC_FAIL; 370 goto clean_up; 371 } 372 373 picParam->slice_group_change_rate_minus1 = 0; /* default value */ 374 if (picParam->num_slice_groups_minus1 > 0) 375 { 376 ue_v(stream, &(picParam->slice_group_map_type)); 377 if (picParam->slice_group_map_type == 0) 378 { 379 for (iGroup = 0; iGroup <= (int)picParam->num_slice_groups_minus1; iGroup++) 380 { 381 ue_v(stream, &(picParam->run_length_minus1[iGroup])); 382 } 383 } 384 else if (picParam->slice_group_map_type == 2) 385 { // MC_CHECK <= or < 386 for (iGroup = 0; iGroup < (int)picParam->num_slice_groups_minus1; iGroup++) 387 { 388 ue_v(stream, &(picParam->top_left[iGroup])); 389 ue_v(stream, &(picParam->bottom_right[iGroup])); 390 } 391 } 392 else if (picParam->slice_group_map_type == 3 || 393 picParam->slice_group_map_type == 4 || 394 picParam->slice_group_map_type == 5) 395 { 396 BitstreamRead1Bit(stream, (uint*)&(picParam->slice_group_change_direction_flag)); 397 ue_v(stream, &(picParam->slice_group_change_rate_minus1)); 398 } 399 else if (picParam->slice_group_map_type == 6) 400 { 401 ue_v(stream, &(picParam->pic_size_in_map_units_minus1)); 402 403 numBits = 0;/* ceil(log2(num_slice_groups_minus1+1)) bits */ 404 i = picParam->num_slice_groups_minus1; 405 while (i > 0) 406 { 407 numBits++; 408 i >>= 1; 409 } 410 411 i = picParam->seq_parameter_set_id; 412 if (decvid->seqParams[i] == NULL) 413 { 414 status = AVCDEC_FAIL; 415 goto clean_up; 416 } 417 418 419 PicWidthInMbs = decvid->seqParams[i]->pic_width_in_mbs_minus1 + 1; 420 PicHeightInMapUnits = decvid->seqParams[i]->pic_height_in_map_units_minus1 + 1 ; 421 PicSizeInMapUnits = PicWidthInMbs * PicHeightInMapUnits ; 422 423 /* information has to be consistent with the seq_param */ 424 if ((int)picParam->pic_size_in_map_units_minus1 != PicSizeInMapUnits - 1) 425 { 426 status = AVCDEC_FAIL; 427 goto clean_up; 428 } 429 430 if (picParam->slice_group_id) 431 { 432 avcHandle->CBAVC_Free(userData, (int)picParam->slice_group_id); 433 } 434 picParam->slice_group_id = (uint*)avcHandle->CBAVC_Malloc(userData, sizeof(uint) * PicSizeInMapUnits, DEFAULT_ATTR); 435 if (picParam->slice_group_id == NULL) 436 { 437 status = AVCDEC_MEMORY_FAIL; 438 goto clean_up; 439 } 440 441 for (i = 0; i < PicSizeInMapUnits; i++) 442 { 443 BitstreamReadBits(stream, numBits, &(picParam->slice_group_id[i])); 444 } 445 } 446 447 } 448 449 ue_v(stream, &(picParam->num_ref_idx_l0_active_minus1)); 450 if (picParam->num_ref_idx_l0_active_minus1 > 31) 451 { 452 status = AVCDEC_FAIL; /* out of range */ 453 goto clean_up; 454 } 455 456 ue_v(stream, &(picParam->num_ref_idx_l1_active_minus1)); 457 if (picParam->num_ref_idx_l1_active_minus1 > 31) 458 { 459 status = AVCDEC_FAIL; /* out of range */ 460 goto clean_up; 461 } 462 463 BitstreamRead1Bit(stream, (uint*)&(picParam->weighted_pred_flag)); 464 BitstreamReadBits(stream, 2, &(picParam->weighted_bipred_idc)); 465 if (picParam->weighted_bipred_idc > 2) 466 { 467 status = AVCDEC_FAIL; /* out of range */ 468 goto clean_up; 469 } 470 471 se_v(stream, &(picParam->pic_init_qp_minus26)); 472 if (picParam->pic_init_qp_minus26 < -26 || picParam->pic_init_qp_minus26 > 25) 473 { 474 status = AVCDEC_FAIL; /* out of range */ 475 goto clean_up; 476 } 477 478 se_v(stream, &(picParam->pic_init_qs_minus26)); 479 if (picParam->pic_init_qs_minus26 < -26 || picParam->pic_init_qs_minus26 > 25) 480 { 481 status = AVCDEC_FAIL; /* out of range */ 482 goto clean_up; 483 } 484 485 se_v(stream, &(picParam->chroma_qp_index_offset)); 486 if (picParam->chroma_qp_index_offset < -12 || picParam->chroma_qp_index_offset > 12) 487 { 488 status = AVCDEC_FAIL; /* out of range */ 489 status = AVCDEC_FAIL; /* out of range */ 490 goto clean_up; 491 } 492 493 BitstreamReadBits(stream, 3, &pic_parameter_set_id); 494 picParam->deblocking_filter_control_present_flag = pic_parameter_set_id >> 2; 495 picParam->constrained_intra_pred_flag = (pic_parameter_set_id >> 1) & 1; 496 picParam->redundant_pic_cnt_present_flag = pic_parameter_set_id & 1; 497 498 return AVCDEC_SUCCESS; 499 clean_up: 500 if (decvid->picParams[pic_parameter_set_id]) 501 { 502 if (picParam->slice_group_id) 503 { 504 avcHandle->CBAVC_Free(userData, (int)picParam->slice_group_id); 505 } 506 decvid->picParams[pic_parameter_set_id]->slice_group_id = NULL; 507 avcHandle->CBAVC_Free(userData, (int)decvid->picParams[pic_parameter_set_id]); 508 decvid->picParams[pic_parameter_set_id] = NULL; 509 return status; 510 } 511 return AVCDEC_SUCCESS; 512 } 513 514 515 /* FirstPartOfSliceHeader(); 516 RestOfSliceHeader() */ 517 /** see subclause 7.4.3 */ 518 AVCDec_Status DecodeSliceHeader(AVCDecObject *decvid, AVCCommonObj *video, AVCDecBitstream *stream) 519 { 520 AVCSliceHeader *sliceHdr = video->sliceHdr; 521 AVCPicParamSet *currPPS; 522 AVCSeqParamSet *currSPS; 523 AVCDec_Status status; 524 uint idr_pic_id; 525 int slice_type, temp, i; 526 527 ue_v(stream, &(sliceHdr->first_mb_in_slice)); 528 ue_v(stream, (uint*)&slice_type); 529 530 if (sliceHdr->first_mb_in_slice != 0) 531 { 532 if ((int)sliceHdr->slice_type >= 5 && slice_type != (int)sliceHdr->slice_type - 5) 533 { 534 return AVCDEC_FAIL; /* slice type doesn't follow the first slice in the picture */ 535 } 536 } 537 sliceHdr->slice_type = (AVCSliceType) slice_type; 538 if (slice_type > 4) 539 { 540 slice_type -= 5; 541 } 542 543 if (slice_type == 1 || slice_type > 2) 544 { 545 return AVCDEC_FAIL; 546 } 547 548 video->slice_type = (AVCSliceType) slice_type; 549 550 ue_v(stream, &(sliceHdr->pic_parameter_set_id)); 551 /* end FirstPartSliceHeader() */ 552 /* begin RestOfSliceHeader() */ 553 /* after getting pic_parameter_set_id, we have to load corresponding SPS and PPS */ 554 if (sliceHdr->pic_parameter_set_id > 255) 555 { 556 return AVCDEC_FAIL; 557 } 558 559 if (decvid->picParams[sliceHdr->pic_parameter_set_id] == NULL) 560 return AVCDEC_FAIL; /* PPS doesn't exist */ 561 562 currPPS = video->currPicParams = decvid->picParams[sliceHdr->pic_parameter_set_id]; 563 564 if (decvid->seqParams[currPPS->seq_parameter_set_id] == NULL) 565 return AVCDEC_FAIL; /* SPS doesn't exist */ 566 567 currSPS = video->currSeqParams = decvid->seqParams[currPPS->seq_parameter_set_id]; 568 569 if (currPPS->seq_parameter_set_id != video->seq_parameter_set_id) 570 { 571 video->seq_parameter_set_id = currPPS->seq_parameter_set_id; 572 status = (AVCDec_Status)AVCConfigureSequence(decvid->avcHandle, video, false); 573 if (status != AVCDEC_SUCCESS) 574 return status; 575 video->level_idc = currSPS->level_idc; 576 } 577 578 /* derived variables from SPS */ 579 video->MaxFrameNum = 1 << (currSPS->log2_max_frame_num_minus4 + 4); 580 // MC_OPTIMIZE 581 video->PicWidthInMbs = currSPS->pic_width_in_mbs_minus1 + 1; 582 video->PicWidthInSamplesL = video->PicWidthInMbs * 16 ; 583 video->PicWidthInSamplesC = video->PicWidthInMbs * 8 ; 584 video->PicHeightInMapUnits = currSPS->pic_height_in_map_units_minus1 + 1 ; 585 video->PicSizeInMapUnits = video->PicWidthInMbs * video->PicHeightInMapUnits ; 586 video->FrameHeightInMbs = (2 - currSPS->frame_mbs_only_flag) * video->PicHeightInMapUnits ; 587 588 /* derived from PPS */ 589 video->SliceGroupChangeRate = currPPS->slice_group_change_rate_minus1 + 1; 590 591 /* then we can continue decoding slice header */ 592 593 BitstreamReadBits(stream, currSPS->log2_max_frame_num_minus4 + 4, &(sliceHdr->frame_num)); 594 595 if (video->currFS == NULL && sliceHdr->frame_num != 0) 596 { 597 video->prevFrameNum = video->PrevRefFrameNum = sliceHdr->frame_num - 1; 598 } 599 600 if (!currSPS->frame_mbs_only_flag) 601 { 602 BitstreamRead1Bit(stream, &(sliceHdr->field_pic_flag)); 603 if (sliceHdr->field_pic_flag) 604 { 605 return AVCDEC_FAIL; 606 } 607 } 608 609 /* derived variables from slice header*/ 610 video->PicHeightInMbs = video->FrameHeightInMbs; 611 video->PicHeightInSamplesL = video->PicHeightInMbs * 16; 612 video->PicHeightInSamplesC = video->PicHeightInMbs * 8; 613 video->PicSizeInMbs = video->PicWidthInMbs * video->PicHeightInMbs; 614 615 if (sliceHdr->first_mb_in_slice >= video->PicSizeInMbs) 616 { 617 return AVCDEC_FAIL; 618 } 619 video->MaxPicNum = video->MaxFrameNum; 620 video->CurrPicNum = sliceHdr->frame_num; 621 622 623 if (video->nal_unit_type == AVC_NALTYPE_IDR) 624 { 625 if (sliceHdr->frame_num != 0) 626 { 627 return AVCDEC_FAIL; 628 } 629 ue_v(stream, &idr_pic_id); 630 } 631 632 sliceHdr->delta_pic_order_cnt_bottom = 0; /* default value */ 633 sliceHdr->delta_pic_order_cnt[0] = 0; /* default value */ 634 sliceHdr->delta_pic_order_cnt[1] = 0; /* default value */ 635 if (currSPS->pic_order_cnt_type == 0) 636 { 637 BitstreamReadBits(stream, currSPS->log2_max_pic_order_cnt_lsb_minus4 + 4, 638 &(sliceHdr->pic_order_cnt_lsb)); 639 video->MaxPicOrderCntLsb = 1 << (currSPS->log2_max_pic_order_cnt_lsb_minus4 + 4); 640 if (sliceHdr->pic_order_cnt_lsb > video->MaxPicOrderCntLsb - 1) 641 return AVCDEC_FAIL; /* out of range */ 642 643 if (currPPS->pic_order_present_flag) 644 { 645 se_v32bit(stream, &(sliceHdr->delta_pic_order_cnt_bottom)); 646 } 647 } 648 if (currSPS->pic_order_cnt_type == 1 && !currSPS->delta_pic_order_always_zero_flag) 649 { 650 se_v32bit(stream, &(sliceHdr->delta_pic_order_cnt[0])); 651 if (currPPS->pic_order_present_flag) 652 { 653 se_v32bit(stream, &(sliceHdr->delta_pic_order_cnt[1])); 654 } 655 } 656 657 sliceHdr->redundant_pic_cnt = 0; /* default value */ 658 if (currPPS->redundant_pic_cnt_present_flag) 659 { 660 // MC_CHECK 661 ue_v(stream, &(sliceHdr->redundant_pic_cnt)); 662 if (sliceHdr->redundant_pic_cnt > 127) /* out of range */ 663 return AVCDEC_FAIL; 664 665 if (sliceHdr->redundant_pic_cnt > 0) /* redundant picture */ 666 return AVCDEC_FAIL; /* not supported */ 667 } 668 sliceHdr->num_ref_idx_l0_active_minus1 = currPPS->num_ref_idx_l0_active_minus1; 669 sliceHdr->num_ref_idx_l1_active_minus1 = currPPS->num_ref_idx_l1_active_minus1; 670 671 if (slice_type == AVC_P_SLICE) 672 { 673 BitstreamRead1Bit(stream, &(sliceHdr->num_ref_idx_active_override_flag)); 674 if (sliceHdr->num_ref_idx_active_override_flag) 675 { 676 ue_v(stream, &(sliceHdr->num_ref_idx_l0_active_minus1)); 677 } 678 else /* the following condition is not allowed if the flag is zero */ 679 { 680 if ((slice_type == AVC_P_SLICE) && currPPS->num_ref_idx_l0_active_minus1 > 15) 681 { 682 return AVCDEC_FAIL; /* not allowed */ 683 } 684 } 685 } 686 687 688 if (sliceHdr->num_ref_idx_l0_active_minus1 > 15 || 689 sliceHdr->num_ref_idx_l1_active_minus1 > 15) 690 { 691 return AVCDEC_FAIL; /* not allowed */ 692 } 693 /* if MbaffFrameFlag =1, 694 max value of index is num_ref_idx_l0_active_minus1 for frame MBs and 695 2*sliceHdr->num_ref_idx_l0_active_minus1 + 1 for field MBs */ 696 697 /* ref_pic_list_reordering() */ 698 status = ref_pic_list_reordering(video, stream, sliceHdr, slice_type); 699 if (status != AVCDEC_SUCCESS) 700 { 701 return status; 702 } 703 704 705 if (video->nal_ref_idc != 0) 706 { 707 dec_ref_pic_marking(video, stream, sliceHdr); 708 } 709 se_v(stream, &(sliceHdr->slice_qp_delta)); 710 711 video->QPy = 26 + currPPS->pic_init_qp_minus26 + sliceHdr->slice_qp_delta; 712 if (video->QPy > 51 || video->QPy < 0) 713 { 714 video->QPy = AVC_CLIP3(0, 51, video->QPy); 715 // return AVCDEC_FAIL; 716 } 717 video->QPc = mapQPi2QPc[AVC_CLIP3(0, 51, video->QPy + video->currPicParams->chroma_qp_index_offset)]; 718 719 video->QPy_div_6 = (video->QPy * 43) >> 8; 720 video->QPy_mod_6 = video->QPy - 6 * video->QPy_div_6; 721 722 video->QPc_div_6 = (video->QPc * 43) >> 8; 723 video->QPc_mod_6 = video->QPc - 6 * video->QPc_div_6; 724 725 sliceHdr->slice_alpha_c0_offset_div2 = 0; 726 sliceHdr->slice_beta_offset_div_2 = 0; 727 sliceHdr->disable_deblocking_filter_idc = 0; 728 video->FilterOffsetA = video->FilterOffsetB = 0; 729 730 if (currPPS->deblocking_filter_control_present_flag) 731 { 732 ue_v(stream, &(sliceHdr->disable_deblocking_filter_idc)); 733 if (sliceHdr->disable_deblocking_filter_idc > 2) 734 { 735 return AVCDEC_FAIL; /* out of range */ 736 } 737 if (sliceHdr->disable_deblocking_filter_idc != 1) 738 { 739 se_v(stream, &(sliceHdr->slice_alpha_c0_offset_div2)); 740 if (sliceHdr->slice_alpha_c0_offset_div2 < -6 || 741 sliceHdr->slice_alpha_c0_offset_div2 > 6) 742 { 743 return AVCDEC_FAIL; 744 } 745 video->FilterOffsetA = sliceHdr->slice_alpha_c0_offset_div2 << 1; 746 747 se_v(stream, &(sliceHdr->slice_beta_offset_div_2)); 748 if (sliceHdr->slice_beta_offset_div_2 < -6 || 749 sliceHdr->slice_beta_offset_div_2 > 6) 750 { 751 return AVCDEC_FAIL; 752 } 753 video->FilterOffsetB = sliceHdr->slice_beta_offset_div_2 << 1; 754 } 755 } 756 757 if (currPPS->num_slice_groups_minus1 > 0 && currPPS->slice_group_map_type >= 3 758 && currPPS->slice_group_map_type <= 5) 759 { 760 /* Ceil(Log2(PicSizeInMapUnits/(float)SliceGroupChangeRate + 1)) */ 761 temp = video->PicSizeInMapUnits / video->SliceGroupChangeRate; 762 if (video->PicSizeInMapUnits % video->SliceGroupChangeRate) 763 { 764 temp++; 765 } 766 i = 0; 767 temp++; 768 while (temp) 769 { 770 temp >>= 1; 771 i++; 772 } 773 774 BitstreamReadBits(stream, i, &(sliceHdr->slice_group_change_cycle)); 775 video->MapUnitsInSliceGroup0 = 776 AVC_MIN(sliceHdr->slice_group_change_cycle * video->SliceGroupChangeRate, video->PicSizeInMapUnits); 777 } 778 779 return AVCDEC_SUCCESS; 780 } 781 782 783 AVCDec_Status fill_frame_num_gap(AVCHandle *avcHandle, AVCCommonObj *video) 784 { 785 AVCDec_Status status; 786 int CurrFrameNum; 787 int UnusedShortTermFrameNum; 788 int tmp1 = video->sliceHdr->delta_pic_order_cnt[0]; 789 int tmp2 = video->sliceHdr->delta_pic_order_cnt[1]; 790 int tmp3 = video->CurrPicNum; 791 int tmp4 = video->sliceHdr->adaptive_ref_pic_marking_mode_flag; 792 UnusedShortTermFrameNum = (video->prevFrameNum + 1) % video->MaxFrameNum; 793 CurrFrameNum = video->sliceHdr->frame_num; 794 795 video->sliceHdr->delta_pic_order_cnt[0] = 0; 796 video->sliceHdr->delta_pic_order_cnt[1] = 0; 797 while (CurrFrameNum != UnusedShortTermFrameNum) 798 { 799 video->CurrPicNum = UnusedShortTermFrameNum; 800 video->sliceHdr->frame_num = UnusedShortTermFrameNum; 801 802 status = (AVCDec_Status)DPBInitBuffer(avcHandle, video); 803 if (status != AVCDEC_SUCCESS) /* no buffer available */ 804 { 805 return status; 806 } 807 DecodePOC(video); 808 DPBInitPic(video, UnusedShortTermFrameNum); 809 810 811 video->currFS->PicOrderCnt = video->PicOrderCnt; 812 video->currFS->FrameNum = video->sliceHdr->frame_num; 813 814 /* initialize everything to zero */ 815 video->currFS->IsOutputted = 0x01; 816 video->currFS->IsReference = 3; 817 video->currFS->IsLongTerm = 0; 818 video->currFS->frame.isReference = TRUE; 819 video->currFS->frame.isLongTerm = FALSE; 820 821 video->sliceHdr->adaptive_ref_pic_marking_mode_flag = 0; 822 823 status = (AVCDec_Status)StorePictureInDPB(avcHandle, video); // MC_CHECK check the return status 824 if (status != AVCDEC_SUCCESS) 825 { 826 return AVCDEC_FAIL; 827 } 828 video->prevFrameNum = UnusedShortTermFrameNum; 829 UnusedShortTermFrameNum = (UnusedShortTermFrameNum + 1) % video->MaxFrameNum; 830 } 831 video->sliceHdr->frame_num = CurrFrameNum; 832 video->CurrPicNum = tmp3; 833 video->sliceHdr->delta_pic_order_cnt[0] = tmp1; 834 video->sliceHdr->delta_pic_order_cnt[1] = tmp2; 835 video->sliceHdr->adaptive_ref_pic_marking_mode_flag = tmp4; 836 return AVCDEC_SUCCESS; 837 } 838 839 /** see subclause 7.4.3.1 */ 840 AVCDec_Status ref_pic_list_reordering(AVCCommonObj *video, AVCDecBitstream *stream, AVCSliceHeader *sliceHdr, int slice_type) 841 { 842 int i; 843 844 if (slice_type != AVC_I_SLICE) 845 { 846 BitstreamRead1Bit(stream, &(sliceHdr->ref_pic_list_reordering_flag_l0)); 847 if (sliceHdr->ref_pic_list_reordering_flag_l0) 848 { 849 i = 0; 850 do 851 { 852 ue_v(stream, &(sliceHdr->reordering_of_pic_nums_idc_l0[i])); 853 if (sliceHdr->reordering_of_pic_nums_idc_l0[i] == 0 || 854 sliceHdr->reordering_of_pic_nums_idc_l0[i] == 1) 855 { 856 ue_v(stream, &(sliceHdr->abs_diff_pic_num_minus1_l0[i])); 857 if (sliceHdr->reordering_of_pic_nums_idc_l0[i] == 0 && 858 sliceHdr->abs_diff_pic_num_minus1_l0[i] > video->MaxPicNum / 2 - 1) 859 { 860 return AVCDEC_FAIL; /* out of range */ 861 } 862 if (sliceHdr->reordering_of_pic_nums_idc_l0[i] == 1 && 863 sliceHdr->abs_diff_pic_num_minus1_l0[i] > video->MaxPicNum / 2 - 2) 864 { 865 return AVCDEC_FAIL; /* out of range */ 866 } 867 } 868 else if (sliceHdr->reordering_of_pic_nums_idc_l0[i] == 2) 869 { 870 ue_v(stream, &(sliceHdr->long_term_pic_num_l0[i])); 871 } 872 i++; 873 } 874 while (sliceHdr->reordering_of_pic_nums_idc_l0[i-1] != 3 875 && i <= (int)sliceHdr->num_ref_idx_l0_active_minus1 + 1) ; 876 } 877 } 878 return AVCDEC_SUCCESS; 879 } 880 881 /** see subclause 7.4.3.3 */ 882 AVCDec_Status dec_ref_pic_marking(AVCCommonObj *video, AVCDecBitstream *stream, AVCSliceHeader *sliceHdr) 883 { 884 int i; 885 if (video->nal_unit_type == AVC_NALTYPE_IDR) 886 { 887 BitstreamRead1Bit(stream, &(sliceHdr->no_output_of_prior_pics_flag)); 888 BitstreamRead1Bit(stream, &(sliceHdr->long_term_reference_flag)); 889 if (sliceHdr->long_term_reference_flag == 0) /* used for short-term */ 890 { 891 video->MaxLongTermFrameIdx = -1; /* no long-term frame indx */ 892 } 893 else /* used for long-term */ 894 { 895 video->MaxLongTermFrameIdx = 0; 896 video->LongTermFrameIdx = 0; 897 } 898 } 899 else 900 { 901 BitstreamRead1Bit(stream, &(sliceHdr->adaptive_ref_pic_marking_mode_flag)); 902 if (sliceHdr->adaptive_ref_pic_marking_mode_flag) 903 { 904 i = 0; 905 do 906 { 907 ue_v(stream, &(sliceHdr->memory_management_control_operation[i])); 908 if (sliceHdr->memory_management_control_operation[i] == 1 || 909 sliceHdr->memory_management_control_operation[i] == 3) 910 { 911 ue_v(stream, &(sliceHdr->difference_of_pic_nums_minus1[i])); 912 } 913 if (sliceHdr->memory_management_control_operation[i] == 2) 914 { 915 ue_v(stream, &(sliceHdr->long_term_pic_num[i])); 916 } 917 if (sliceHdr->memory_management_control_operation[i] == 3 || 918 sliceHdr->memory_management_control_operation[i] == 6) 919 { 920 ue_v(stream, &(sliceHdr->long_term_frame_idx[i])); 921 } 922 if (sliceHdr->memory_management_control_operation[i] == 4) 923 { 924 ue_v(stream, &(sliceHdr->max_long_term_frame_idx_plus1[i])); 925 } 926 i++; 927 } 928 while (sliceHdr->memory_management_control_operation[i-1] != 0 && i < MAX_DEC_REF_PIC_MARKING); 929 if (i >= MAX_DEC_REF_PIC_MARKING) 930 { 931 return AVCDEC_FAIL; /* we're screwed!!, not enough memory */ 932 } 933 } 934 } 935 936 return AVCDEC_SUCCESS; 937 } 938 939 /* see subclause 8.2.1 Decoding process for picture order count. */ 940 AVCDec_Status DecodePOC(AVCCommonObj *video) 941 { 942 AVCSeqParamSet *currSPS = video->currSeqParams; 943 AVCSliceHeader *sliceHdr = video->sliceHdr; 944 int i; 945 946 switch (currSPS->pic_order_cnt_type) 947 { 948 case 0: /* POC MODE 0 , subclause 8.2.1.1 */ 949 if (video->nal_unit_type == AVC_NALTYPE_IDR) 950 { 951 video->prevPicOrderCntMsb = 0; 952 video->prevPicOrderCntLsb = 0; 953 } 954 955 /* Calculate the MSBs of current picture */ 956 if (sliceHdr->pic_order_cnt_lsb < video->prevPicOrderCntLsb && 957 (video->prevPicOrderCntLsb - sliceHdr->pic_order_cnt_lsb) >= (video->MaxPicOrderCntLsb / 2)) 958 video->PicOrderCntMsb = video->prevPicOrderCntMsb + video->MaxPicOrderCntLsb; 959 else if (sliceHdr->pic_order_cnt_lsb > video->prevPicOrderCntLsb && 960 (sliceHdr->pic_order_cnt_lsb - video->prevPicOrderCntLsb) > (video->MaxPicOrderCntLsb / 2)) 961 video->PicOrderCntMsb = video->prevPicOrderCntMsb - video->MaxPicOrderCntLsb; 962 else 963 video->PicOrderCntMsb = video->prevPicOrderCntMsb; 964 965 /* JVT-I010 page 81 is different from JM7.3 */ 966 967 968 video->PicOrderCnt = video->TopFieldOrderCnt = video->PicOrderCntMsb + sliceHdr->pic_order_cnt_lsb; 969 video->BottomFieldOrderCnt = video->TopFieldOrderCnt + sliceHdr->delta_pic_order_cnt_bottom; 970 971 break; 972 973 974 case 1: /* POC MODE 1, subclause 8.2.1.2 */ 975 /* calculate FrameNumOffset */ 976 if (video->nal_unit_type == AVC_NALTYPE_IDR) 977 { 978 video->prevFrameNumOffset = 0; 979 video->FrameNumOffset = 0; 980 } 981 else if (video->prevFrameNum > sliceHdr->frame_num) 982 { 983 video->FrameNumOffset = video->prevFrameNumOffset + video->MaxFrameNum; 984 } 985 else 986 { 987 video->FrameNumOffset = video->prevFrameNumOffset; 988 } 989 /* calculate absFrameNum */ 990 if (currSPS->num_ref_frames_in_pic_order_cnt_cycle) 991 { 992 video->absFrameNum = video->FrameNumOffset + sliceHdr->frame_num; 993 } 994 else 995 { 996 video->absFrameNum = 0; 997 } 998 999 if (video->absFrameNum > 0 && video->nal_ref_idc == 0) 1000 { 1001 video->absFrameNum--; 1002 } 1003 1004 /* derive picOrderCntCycleCnt and frameNumInPicOrderCntCycle */ 1005 if (video->absFrameNum > 0) 1006 { 1007 video->picOrderCntCycleCnt = (video->absFrameNum - 1) / currSPS->num_ref_frames_in_pic_order_cnt_cycle; 1008 video->frameNumInPicOrderCntCycle = (video->absFrameNum - 1) % currSPS->num_ref_frames_in_pic_order_cnt_cycle; 1009 } 1010 /* derive expectedDeltaPerPicOrderCntCycle */ 1011 video->expectedDeltaPerPicOrderCntCycle = 0; 1012 for (i = 0; i < (int)currSPS->num_ref_frames_in_pic_order_cnt_cycle; i++) 1013 { 1014 video->expectedDeltaPerPicOrderCntCycle += currSPS->offset_for_ref_frame[i]; 1015 } 1016 /* derive expectedPicOrderCnt */ 1017 if (video->absFrameNum) 1018 { 1019 video->expectedPicOrderCnt = video->picOrderCntCycleCnt * video->expectedDeltaPerPicOrderCntCycle; 1020 for (i = 0; i <= video->frameNumInPicOrderCntCycle; i++) 1021 { 1022 video->expectedPicOrderCnt += currSPS->offset_for_ref_frame[i]; 1023 } 1024 } 1025 else 1026 { 1027 video->expectedPicOrderCnt = 0; 1028 } 1029 1030 if (video->nal_ref_idc == 0) 1031 { 1032 video->expectedPicOrderCnt += currSPS->offset_for_non_ref_pic; 1033 } 1034 /* derive TopFieldOrderCnt and BottomFieldOrderCnt */ 1035 1036 video->TopFieldOrderCnt = video->expectedPicOrderCnt + sliceHdr->delta_pic_order_cnt[0]; 1037 video->BottomFieldOrderCnt = video->TopFieldOrderCnt + currSPS->offset_for_top_to_bottom_field + sliceHdr->delta_pic_order_cnt[1]; 1038 1039 video->PicOrderCnt = AVC_MIN(video->TopFieldOrderCnt, video->BottomFieldOrderCnt); 1040 1041 1042 break; 1043 1044 1045 case 2: /* POC MODE 2, subclause 8.2.1.3 */ 1046 if (video->nal_unit_type == AVC_NALTYPE_IDR) 1047 { 1048 video->FrameNumOffset = 0; 1049 } 1050 else if (video->prevFrameNum > sliceHdr->frame_num) 1051 { 1052 video->FrameNumOffset = video->prevFrameNumOffset + video->MaxFrameNum; 1053 } 1054 else 1055 { 1056 video->FrameNumOffset = video->prevFrameNumOffset; 1057 } 1058 /* derive tempPicOrderCnt, we just use PicOrderCnt */ 1059 if (video->nal_unit_type == AVC_NALTYPE_IDR) 1060 { 1061 video->PicOrderCnt = 0; 1062 } 1063 else if (video->nal_ref_idc == 0) 1064 { 1065 video->PicOrderCnt = 2 * (video->FrameNumOffset + sliceHdr->frame_num) - 1; 1066 } 1067 else 1068 { 1069 video->PicOrderCnt = 2 * (video->FrameNumOffset + sliceHdr->frame_num); 1070 } 1071 video->TopFieldOrderCnt = video->BottomFieldOrderCnt = video->PicOrderCnt; 1072 break; 1073 default: 1074 return AVCDEC_FAIL; 1075 } 1076 1077 return AVCDEC_SUCCESS; 1078 } 1079 1080 1081 AVCDec_Status DecodeSEI(AVCDecObject *decvid, AVCDecBitstream *stream) 1082 { 1083 OSCL_UNUSED_ARG(decvid); 1084 OSCL_UNUSED_ARG(stream); 1085 return AVCDEC_SUCCESS; 1086 } 1087 1088 AVCDec_Status sei_payload(AVCDecObject *decvid, AVCDecBitstream *stream, uint payloadType, uint payloadSize) 1089 { 1090 AVCDec_Status status = AVCDEC_SUCCESS; 1091 uint i; 1092 switch (payloadType) 1093 { 1094 case 0: 1095 /* buffering period SEI */ 1096 status = buffering_period(decvid, stream); 1097 break; 1098 case 1: 1099 /* picture timing SEI */ 1100 status = pic_timing(decvid, stream); 1101 break; 1102 case 2: 1103 1104 case 3: 1105 1106 case 4: 1107 1108 case 5: 1109 1110 case 8: 1111 1112 case 9: 1113 1114 case 10: 1115 1116 case 11: 1117 1118 case 12: 1119 1120 case 13: 1121 1122 case 14: 1123 1124 case 15: 1125 1126 case 16: 1127 1128 case 17: 1129 for (i = 0; i < payloadSize; i++) 1130 { 1131 BitstreamFlushBits(stream, 8); 1132 } 1133 break; 1134 case 6: 1135 /* recovery point SEI */ 1136 status = recovery_point(decvid, stream); 1137 break; 1138 case 7: 1139 /* decoded reference picture marking repetition SEI */ 1140 status = dec_ref_pic_marking_repetition(decvid, stream); 1141 break; 1142 1143 case 18: 1144 /* motion-constrained slice group set SEI */ 1145 status = motion_constrained_slice_group_set(decvid, stream); 1146 break; 1147 default: 1148 /* reserved_sei_message */ 1149 for (i = 0; i < payloadSize; i++) 1150 { 1151 BitstreamFlushBits(stream, 8); 1152 } 1153 break; 1154 } 1155 BitstreamByteAlign(stream); 1156 return status; 1157 } 1158 1159 AVCDec_Status buffering_period(AVCDecObject *decvid, AVCDecBitstream *stream) 1160 { 1161 AVCSeqParamSet *currSPS; 1162 uint seq_parameter_set_id; 1163 uint temp; 1164 uint i; 1165 ue_v(stream, &seq_parameter_set_id); 1166 if (seq_parameter_set_id > 31) 1167 { 1168 return AVCDEC_FAIL; 1169 } 1170 1171 // decvid->common->seq_parameter_set_id = seq_parameter_set_id; 1172 1173 currSPS = decvid->seqParams[seq_parameter_set_id]; 1174 if (currSPS->vui_parameters.nal_hrd_parameters_present_flag) 1175 { 1176 for (i = 0; i <= currSPS->vui_parameters.nal_hrd_parameters.cpb_cnt_minus1; i++) 1177 { 1178 /* initial_cpb_removal_delay[i] */ 1179 BitstreamReadBits(stream, currSPS->vui_parameters.nal_hrd_parameters.cpb_removal_delay_length_minus1 + 1, &temp); 1180 /*initial _cpb_removal_delay_offset[i] */ 1181 BitstreamReadBits(stream, currSPS->vui_parameters.nal_hrd_parameters.cpb_removal_delay_length_minus1 + 1, &temp); 1182 } 1183 } 1184 1185 if (currSPS->vui_parameters.vcl_hrd_parameters_present_flag) 1186 { 1187 for (i = 0; i <= currSPS->vui_parameters.vcl_hrd_parameters.cpb_cnt_minus1; i++) 1188 { 1189 /* initial_cpb_removal_delay[i] */ 1190 BitstreamReadBits(stream, currSPS->vui_parameters.vcl_hrd_parameters.cpb_removal_delay_length_minus1 + 1, &temp); 1191 /*initial _cpb_removal_delay_offset[i] */ 1192 BitstreamReadBits(stream, currSPS->vui_parameters.vcl_hrd_parameters.cpb_removal_delay_length_minus1 + 1, &temp); 1193 } 1194 } 1195 1196 return AVCDEC_SUCCESS; 1197 } 1198 AVCDec_Status pic_timing(AVCDecObject *decvid, AVCDecBitstream *stream) 1199 { 1200 AVCSeqParamSet *currSPS; 1201 uint temp, NumClockTs = 0, time_offset_length = 24, full_timestamp_flag; 1202 uint i; 1203 1204 currSPS = decvid->seqParams[decvid->common->seq_parameter_set_id]; 1205 1206 if (currSPS->vui_parameters.nal_hrd_parameters_present_flag) 1207 { 1208 BitstreamReadBits(stream, currSPS->vui_parameters.nal_hrd_parameters.cpb_removal_delay_length_minus1 + 1, &temp); 1209 BitstreamReadBits(stream, currSPS->vui_parameters.nal_hrd_parameters.dpb_output_delay_length_minus1 + 1, &temp); 1210 time_offset_length = currSPS->vui_parameters.nal_hrd_parameters.time_offset_length; 1211 } 1212 else if (currSPS->vui_parameters.vcl_hrd_parameters_present_flag) 1213 { 1214 BitstreamReadBits(stream, currSPS->vui_parameters.vcl_hrd_parameters.cpb_removal_delay_length_minus1 + 1, &temp); 1215 BitstreamReadBits(stream, currSPS->vui_parameters.vcl_hrd_parameters.dpb_output_delay_length_minus1 + 1, &temp); 1216 time_offset_length = currSPS->vui_parameters.vcl_hrd_parameters.time_offset_length; 1217 } 1218 1219 if (currSPS->vui_parameters.pic_struct_present_flag) 1220 { 1221 /* pic_struct */ 1222 BitstreamReadBits(stream, 4, &temp); 1223 1224 switch (temp) 1225 { 1226 case 0: 1227 case 1: 1228 case 2: 1229 NumClockTs = 1; 1230 break; 1231 case 3: 1232 case 4: 1233 case 7: 1234 NumClockTs = 2; 1235 break; 1236 case 5: 1237 case 6: 1238 case 8: 1239 NumClockTs = 3; 1240 break; 1241 default: 1242 NumClockTs = 0; 1243 break; 1244 } 1245 1246 for (i = 0; i < NumClockTs; i++) 1247 { 1248 /* clock_timestamp_flag[i] */ 1249 BitstreamRead1Bit(stream, &temp); 1250 if (temp) 1251 { 1252 /* ct_type */ 1253 BitstreamReadBits(stream, 2, &temp); 1254 /* nuit_field_based_flag */ 1255 BitstreamRead1Bit(stream, &temp); 1256 /* counting_type */ 1257 BitstreamReadBits(stream, 5, &temp); 1258 /* full_timestamp_flag */ 1259 BitstreamRead1Bit(stream, &temp); 1260 full_timestamp_flag = temp; 1261 /* discontinuity_flag */ 1262 BitstreamRead1Bit(stream, &temp); 1263 /* cnt_dropped_flag */ 1264 BitstreamRead1Bit(stream, &temp); 1265 /* n_frames */ 1266 BitstreamReadBits(stream, 8, &temp); 1267 1268 1269 if (full_timestamp_flag) 1270 { 1271 /* seconds_value */ 1272 BitstreamReadBits(stream, 6, &temp); 1273 /* minutes_value */ 1274 BitstreamReadBits(stream, 6, &temp); 1275 /* hours_value */ 1276 BitstreamReadBits(stream, 5, &temp); 1277 } 1278 else 1279 { 1280 /* seconds_flag */ 1281 BitstreamRead1Bit(stream, &temp); 1282 if (temp) 1283 { 1284 /* seconds_value */ 1285 BitstreamReadBits(stream, 6, &temp); 1286 /* minutes_flag */ 1287 BitstreamRead1Bit(stream, &temp); 1288 if (temp) 1289 { 1290 /* minutes_value */ 1291 BitstreamReadBits(stream, 6, &temp); 1292 1293 /* hourss_flag */ 1294 BitstreamRead1Bit(stream, &temp); 1295 1296 if (temp) 1297 { 1298 /* hours_value */ 1299 BitstreamReadBits(stream, 5, &temp); 1300 } 1301 1302 } 1303 } 1304 } 1305 1306 if (time_offset_length) 1307 { 1308 /* time_offset */ 1309 BitstreamReadBits(stream, time_offset_length, &temp); 1310 } 1311 else 1312 { 1313 /* time_offset */ 1314 temp = 0; 1315 } 1316 } 1317 } 1318 } 1319 return AVCDEC_SUCCESS; 1320 } 1321 AVCDec_Status recovery_point(AVCDecObject *decvid, AVCDecBitstream *stream) 1322 { 1323 OSCL_UNUSED_ARG(decvid); 1324 uint temp; 1325 /* recover_frame_cnt */ 1326 ue_v(stream, &temp); 1327 /* exact_match_flag */ 1328 BitstreamRead1Bit(stream, &temp); 1329 /* broken_link_flag */ 1330 BitstreamRead1Bit(stream, &temp); 1331 /* changing slic_group_idc */ 1332 BitstreamReadBits(stream, 2, &temp); 1333 return AVCDEC_SUCCESS; 1334 } 1335 AVCDec_Status dec_ref_pic_marking_repetition(AVCDecObject *decvid, AVCDecBitstream *stream) 1336 { 1337 AVCSeqParamSet *currSPS; 1338 uint temp; 1339 currSPS = decvid->seqParams[decvid->common->seq_parameter_set_id]; 1340 /* original_idr_flag */ 1341 BitstreamRead1Bit(stream, &temp); 1342 /* original_frame_num */ 1343 ue_v(stream, &temp); 1344 if (currSPS->frame_mbs_only_flag == 0) 1345 { 1346 /* original_field_pic_flag */ 1347 BitstreamRead1Bit(stream, &temp); 1348 if (temp) 1349 { 1350 /* original_bottom_field_flag */ 1351 BitstreamRead1Bit(stream, &temp); 1352 } 1353 } 1354 1355 /* dec_ref_pic_marking(video,stream,sliceHdr); */ 1356 1357 1358 return AVCDEC_SUCCESS; 1359 } 1360 AVCDec_Status motion_constrained_slice_group_set(AVCDecObject *decvid, AVCDecBitstream *stream) 1361 { 1362 OSCL_UNUSED_ARG(decvid); 1363 uint temp, i, numBits; 1364 /* num_slice_groups_in_set_minus1 */ 1365 ue_v(stream, &temp); 1366 1367 numBits = 0;/* ceil(log2(num_slice_groups_minus1+1)) bits */ 1368 i = temp; 1369 while (i > 0) 1370 { 1371 numBits++; 1372 i >>= 1; 1373 } 1374 for (i = 0; i <= temp; i++) 1375 { 1376 /* slice_group_id */ 1377 BitstreamReadBits(stream, numBits, &temp); 1378 } 1379 /* exact_sample_value_match_flag */ 1380 BitstreamRead1Bit(stream, &temp); 1381 /* pan_scan_rect_flag */ 1382 BitstreamRead1Bit(stream, &temp); 1383 if (temp) 1384 { 1385 /* pan_scan_rect_id */ 1386 ue_v(stream, &temp); 1387 } 1388 1389 return AVCDEC_SUCCESS; 1390 } 1391 1392
