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 <string.h> 34 35 #include "ih264_typedefs.h" 36 #include "ih264_macros.h" 37 #include "ih264_platform_macros.h" 38 #include "ih264d_bitstrm.h" 39 #include "ih264d_structs.h" 40 #include "ih264d_parse_cavlc.h" 41 #include "ih264d_defs.h" 42 #include "ih264d_defs.h" 43 #include "ih264d_defs.h" 44 #include "ih264d_parse_slice.h" 45 #include "ih264d_tables.h" 46 #include "ih264d_utils.h" 47 #include "ih264d_nal.h" 48 #include "ih264d_deblocking.h" 49 50 #include "ih264d_mem_request.h" 51 #include "ih264d_debug.h" 52 #include "ih264d_error_handler.h" 53 #include "ih264d_mb_utils.h" 54 #include "ih264d_sei.h" 55 #include "ih264d_vui.h" 56 #include "ih264d_thread_parse_decode.h" 57 #include "ih264d_thread_compute_bs.h" 58 #include "ih264d_quant_scaling.h" 59 #include "ih264d_defs.h" 60 #include "ivd.h" 61 #include "ih264d.h" 62 63 /*****************************************************************************/ 64 /* */ 65 /* Function Name : ih264d_parse_slice_partition */ 66 /* */ 67 /* Description : This function is intended to parse and decode slice part */ 68 /* itions. Currently it's not implemented. Decoder will */ 69 /* print a message, skips this NAL and continues */ 70 /* Inputs : ps_dec Decoder parameters */ 71 /* ps_bitstrm Bitstream */ 72 /* Globals : None */ 73 /* Processing : This functionality needs to be implemented */ 74 /* Outputs : None */ 75 /* Returns : None */ 76 /* */ 77 /* Issues : Not implemented */ 78 /* */ 79 /* Revision History: */ 80 /* */ 81 /* DD MM YYYY Author(s) Changes (Describe the changes made) */ 82 /* 06 05 2002 NS Draft */ 83 /* */ 84 /*****************************************************************************/ 85 86 WORD32 ih264d_parse_slice_partition(dec_struct_t * ps_dec, 87 dec_bit_stream_t * ps_bitstrm) 88 { 89 H264_DEC_DEBUG_PRINT("\nSlice partition not supported"); 90 UNUSED(ps_dec); 91 UNUSED(ps_bitstrm); 92 return (0); 93 } 94 95 /*****************************************************************************/ 96 /* */ 97 /* Function Name : ih264d_parse_sei */ 98 /* */ 99 /* Description : This function is intended to parse and decode SEI */ 100 /* Currently it's not implemented. Decoder will print a */ 101 /* message, skips this NAL and continues */ 102 /* Inputs : ps_dec Decoder parameters */ 103 /* ps_bitstrm Bitstream */ 104 /* Globals : None */ 105 /* Processing : This functionality needs to be implemented */ 106 /* Outputs : None */ 107 /* Returns : None */ 108 /* */ 109 /* Issues : Not implemented */ 110 /* */ 111 /* Revision History: */ 112 /* */ 113 /* DD MM YYYY Author(s) Changes (Describe the changes made) */ 114 /* 06 05 2002 NS Draft */ 115 /* */ 116 /*****************************************************************************/ 117 WORD32 ih264d_parse_sei(dec_struct_t * ps_dec, dec_bit_stream_t * ps_bitstrm) 118 { 119 UNUSED(ps_dec); 120 UNUSED(ps_bitstrm); 121 return (0); 122 } 123 124 /*****************************************************************************/ 125 /* */ 126 /* Function Name : ih264d_parse_filler_data */ 127 /* */ 128 /* Description : This function is intended to parse and decode filler */ 129 /* data NAL. Currently it's not implemented. Decoder will */ 130 /* print a message, skips this NAL and continues */ 131 /* Inputs : ps_dec Decoder parameters */ 132 /* ps_bitstrm Bitstream */ 133 /* Globals : None */ 134 /* Processing : This functionality needs to be implemented */ 135 /* Outputs : None */ 136 /* Returns : None */ 137 /* */ 138 /* Issues : Not implemented */ 139 /* */ 140 /* Revision History: */ 141 /* */ 142 /* DD MM YYYY Author(s) Changes (Describe the changes made) */ 143 /* 06 05 2002 NS Draft */ 144 /* */ 145 /*****************************************************************************/ 146 WORD32 ih264d_parse_filler_data(dec_struct_t * ps_dec, 147 dec_bit_stream_t * ps_bitstrm) 148 { 149 UNUSED(ps_dec); 150 UNUSED(ps_bitstrm); 151 return (0); 152 } 153 154 /*****************************************************************************/ 155 /* */ 156 /* Function Name : ih264d_parse_end_of_stream */ 157 /* */ 158 /* Description : This function is intended to parse and decode end of */ 159 /* sequence. Currently it's not implemented. Decoder will */ 160 /* print a message, skips this NAL and continues */ 161 /* Inputs : ps_dec Decoder parameters */ 162 /* Globals : None */ 163 /* Processing : This functionality needs to be implemented */ 164 /* Outputs : None */ 165 /* Returns : None */ 166 /* */ 167 /* Issues : Not implemented */ 168 /* */ 169 /* Revision History: */ 170 /* */ 171 /* DD MM YYYY Author(s) Changes (Describe the changes made) */ 172 /* 06 05 2002 NS Draft */ 173 /* */ 174 /*****************************************************************************/ 175 void ih264d_parse_end_of_stream(dec_struct_t * ps_dec) 176 { 177 UNUSED(ps_dec); 178 return; 179 } 180 181 /*! 182 ************************************************************************** 183 * \if Function name : ih264d_parse_pps \endif 184 * 185 * \brief 186 * Decodes Picture Parameter set 187 * 188 * \return 189 * 0 on Success and Error code otherwise 190 ************************************************************************** 191 */ 192 WORD32 ih264d_parse_pps(dec_struct_t * ps_dec, dec_bit_stream_t * ps_bitstrm) 193 { 194 UWORD8 uc_temp; 195 dec_seq_params_t * ps_sps = NULL; 196 dec_pic_params_t * ps_pps = NULL; 197 UWORD32 *pu4_bitstrm_buf = ps_dec->ps_bitstrm->pu4_buffer; 198 UWORD32 *pu4_bitstrm_ofst = &ps_dec->ps_bitstrm->u4_ofst; 199 200 /* Variables used for error resilience checks */ 201 UWORD32 u4_temp; 202 WORD32 i_temp; 203 204 /* For High profile related syntax elements */ 205 UWORD8 u1_more_data_flag; 206 WORD32 i4_i; 207 208 /*--------------------------------------------------------------------*/ 209 /* Decode pic_parameter_set_id and find corresponding pic params */ 210 /*--------------------------------------------------------------------*/ 211 u4_temp = ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf); 212 if(u4_temp & MASK_ERR_PIC_SET_ID) 213 return ERROR_INV_SPS_PPS_T; 214 ps_pps = ps_dec->pv_scratch_sps_pps; 215 *ps_pps = ps_dec->ps_pps[u4_temp]; 216 ps_pps->u1_pic_parameter_set_id = (WORD8)u4_temp; 217 COPYTHECONTEXT("PPS: pic_parameter_set_id",ps_pps->u1_pic_parameter_set_id); 218 219 /************************************************/ 220 /* initilization of High profile syntax element */ 221 /************************************************/ 222 ps_pps->i4_transform_8x8_mode_flag = 0; 223 ps_pps->i4_pic_scaling_matrix_present_flag = 0; 224 225 /*--------------------------------------------------------------------*/ 226 /* Decode seq_parameter_set_id and map it to a seq_parameter_set */ 227 /*--------------------------------------------------------------------*/ 228 u4_temp = ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf); 229 if(u4_temp & MASK_ERR_SEQ_SET_ID) 230 return ERROR_INV_SPS_PPS_T; 231 COPYTHECONTEXT("PPS: seq_parameter_set_id",u4_temp); 232 ps_sps = &ps_dec->ps_sps[u4_temp]; 233 ps_pps->ps_sps = ps_sps; 234 235 /*--------------------------------------------------------------------*/ 236 /* Decode entropy_coding_mode */ 237 /*--------------------------------------------------------------------*/ 238 ps_pps->u1_entropy_coding_mode = ih264d_get_bit_h264(ps_bitstrm); 239 COPYTHECONTEXT("PPS: entropy_coding_mode_flag",ps_pps->u1_entropy_coding_mode); 240 241 ps_pps->u1_pic_order_present_flag = ih264d_get_bit_h264(ps_bitstrm); 242 COPYTHECONTEXT("PPS: pic_order_present_flag",ps_pps->u1_pic_order_present_flag); 243 244 /*--------------------------------------------------------------------*/ 245 /* Decode num_slice_groups_minus1 */ 246 /*--------------------------------------------------------------------*/ 247 u4_temp = ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf) + 1; 248 if(u4_temp != 1) 249 { 250 UWORD32 i4_error_code; 251 i4_error_code = ERROR_FEATURE_UNAVAIL; 252 return i4_error_code; 253 } 254 ps_pps->u1_num_slice_groups = u4_temp; 255 COPYTHECONTEXT("PPS: num_slice_groups_minus1",ps_pps->u1_num_slice_groups -1); 256 257 /*--------------------------------------------------------------------*/ 258 /* Other parameter set values */ 259 /*--------------------------------------------------------------------*/ 260 u4_temp = 1 + ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf); 261 if(u4_temp > H264_MAX_REF_IDX) 262 return ERROR_REF_IDX; 263 ps_pps->u1_num_ref_idx_lx_active[0] = u4_temp; 264 COPYTHECONTEXT("PPS: num_ref_idx_l0_active_minus1", 265 ps_pps->u1_num_ref_idx_lx_active[0] - 1); 266 267 u4_temp = 1 + ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf); 268 if(u4_temp > H264_MAX_REF_IDX) 269 return ERROR_REF_IDX; 270 ps_pps->u1_num_ref_idx_lx_active[1] = u4_temp; 271 COPYTHECONTEXT("PPS: num_ref_idx_l1_active_minus1", 272 ps_pps->u1_num_ref_idx_lx_active[1] - 1); 273 274 ps_pps->u1_wted_pred_flag = ih264d_get_bit_h264(ps_bitstrm); 275 COPYTHECONTEXT("PPS: weighted prediction u4_flag",ps_pps->u1_wted_pred_flag); 276 uc_temp = ih264d_get_bits_h264(ps_bitstrm, 2); 277 COPYTHECONTEXT("PPS: weighted_bipred_idc",uc_temp); 278 ps_pps->u1_wted_bipred_idc = uc_temp; 279 280 if(ps_pps->u1_wted_bipred_idc > MAX_WEIGHT_BIPRED_IDC) 281 return ERROR_INV_SPS_PPS_T; 282 283 i_temp = 26 + ih264d_sev(pu4_bitstrm_ofst, pu4_bitstrm_buf); 284 285 if((i_temp < 0) || (i_temp > 51)) 286 return ERROR_INV_RANGE_QP_T; 287 288 ps_pps->u1_pic_init_qp = i_temp; 289 COPYTHECONTEXT("PPS: pic_init_qp_minus26",ps_pps->u1_pic_init_qp - 26); 290 291 i_temp = 26 + ih264d_sev(pu4_bitstrm_ofst, pu4_bitstrm_buf); 292 293 if((i_temp < 0) || (i_temp > 51)) 294 return ERROR_INV_RANGE_QP_T; 295 296 ps_pps->u1_pic_init_qs = i_temp; 297 COPYTHECONTEXT("PPS: pic_init_qs_minus26",ps_pps->u1_pic_init_qs - 26); 298 299 i_temp = ih264d_sev(pu4_bitstrm_ofst, pu4_bitstrm_buf); 300 if((i_temp < -12) || (i_temp > 12)) 301 return ERROR_INV_RANGE_QP_T; 302 ps_pps->i1_chroma_qp_index_offset = i_temp; 303 COPYTHECONTEXT("PPS: chroma_qp_index_offset",ps_pps->i1_chroma_qp_index_offset); 304 305 /***************************************************************************/ 306 /* initialize second_chroma_qp_index_offset to i1_chroma_qp_index_offset if */ 307 /* second_chroma_qp_index_offset is not present in bit-ps_bitstrm */ 308 /***************************************************************************/ 309 ps_pps->i1_second_chroma_qp_index_offset = 310 ps_pps->i1_chroma_qp_index_offset; 311 312 ps_pps->u1_deblocking_filter_parameters_present_flag = ih264d_get_bit_h264( 313 ps_bitstrm); 314 COPYTHECONTEXT("PPS: deblocking_filter_control_present_flag", 315 ps_pps->u1_deblocking_filter_parameters_present_flag); 316 ps_pps->u1_constrained_intra_pred_flag = ih264d_get_bit_h264(ps_bitstrm); 317 COPYTHECONTEXT("PPS: constrained_intra_pred_flag", 318 ps_pps->u1_constrained_intra_pred_flag); 319 ps_pps->u1_redundant_pic_cnt_present_flag = ih264d_get_bit_h264(ps_bitstrm); 320 COPYTHECONTEXT("PPS: redundant_pic_cnt_present_flag", 321 ps_pps->u1_redundant_pic_cnt_present_flag); 322 323 /* High profile related syntax elements */ 324 u1_more_data_flag = MORE_RBSP_DATA(ps_bitstrm); 325 if(u1_more_data_flag && (ps_pps->ps_sps->u1_profile_idc == HIGH_PROFILE_IDC)) 326 { 327 /* read transform_8x8_mode_flag */ 328 ps_pps->i4_transform_8x8_mode_flag = (WORD32)ih264d_get_bit_h264( 329 ps_bitstrm); 330 331 /* read pic_scaling_matrix_present_flag */ 332 ps_pps->i4_pic_scaling_matrix_present_flag = 333 (WORD32)ih264d_get_bit_h264(ps_bitstrm); 334 335 if(ps_pps->i4_pic_scaling_matrix_present_flag) 336 { 337 /* read the scaling matrices */ 338 for(i4_i = 0; i4_i < (6 + (ps_pps->i4_transform_8x8_mode_flag << 1)); i4_i++) 339 { 340 ps_pps->u1_pic_scaling_list_present_flag[i4_i] = 341 ih264d_get_bit_h264(ps_bitstrm); 342 343 if(ps_pps->u1_pic_scaling_list_present_flag[i4_i]) 344 { 345 if(i4_i < 6) 346 { 347 ih264d_scaling_list( 348 ps_pps->i2_pic_scalinglist4x4[i4_i], 349 16, 350 &ps_pps->u1_pic_use_default_scaling_matrix_flag[i4_i], 351 ps_bitstrm); 352 } 353 else 354 { 355 ih264d_scaling_list( 356 ps_pps->i2_pic_scalinglist8x8[i4_i - 6], 357 64, 358 &ps_pps->u1_pic_use_default_scaling_matrix_flag[i4_i], 359 ps_bitstrm); 360 } 361 } 362 } 363 } 364 365 /* read second_chroma_qp_index_offset syntax element */ 366 i_temp = ih264d_sev( 367 pu4_bitstrm_ofst, pu4_bitstrm_buf); 368 369 if((i_temp < -12) || (i_temp > 12)) 370 return ERROR_INV_RANGE_QP_T; 371 372 ps_pps->i1_second_chroma_qp_index_offset = i_temp; 373 } 374 375 /* In case bitstream read has exceeded the filled size, then 376 return an error */ 377 if(ps_bitstrm->u4_ofst > ps_bitstrm->u4_max_ofst + 8) 378 { 379 return ERROR_INV_SPS_PPS_T; 380 } 381 ps_pps->u1_is_valid = TRUE; 382 ps_dec->ps_pps[ps_pps->u1_pic_parameter_set_id] = *ps_pps; 383 return OK; 384 } 385 386 /*! 387 ************************************************************************** 388 * \if Function name : ih264d_parse_sps \endif 389 * 390 * \brief 391 * Decodes Sequence parameter set from the bitstream 392 * 393 * \return 394 * 0 on Success and Error code otherwise 395 ************************************************************************** 396 */ 397 UWORD32 ih264d_correct_level_idc(UWORD32 u4_level_idc, UWORD32 u4_total_mbs) 398 { 399 UWORD32 u4_max_mbs_allowed; 400 401 switch(u4_level_idc) 402 { 403 case H264_LEVEL_1_0: 404 u4_max_mbs_allowed = MAX_MBS_LEVEL_10; 405 break; 406 case H264_LEVEL_1_1: 407 u4_max_mbs_allowed = MAX_MBS_LEVEL_11; 408 break; 409 case H264_LEVEL_1_2: 410 u4_max_mbs_allowed = MAX_MBS_LEVEL_12; 411 break; 412 case H264_LEVEL_1_3: 413 u4_max_mbs_allowed = MAX_MBS_LEVEL_13; 414 break; 415 case H264_LEVEL_2_0: 416 u4_max_mbs_allowed = MAX_MBS_LEVEL_20; 417 break; 418 case H264_LEVEL_2_1: 419 u4_max_mbs_allowed = MAX_MBS_LEVEL_21; 420 break; 421 case H264_LEVEL_2_2: 422 u4_max_mbs_allowed = MAX_MBS_LEVEL_22; 423 break; 424 case H264_LEVEL_3_0: 425 u4_max_mbs_allowed = MAX_MBS_LEVEL_30; 426 break; 427 case H264_LEVEL_3_1: 428 u4_max_mbs_allowed = MAX_MBS_LEVEL_31; 429 break; 430 case H264_LEVEL_3_2: 431 u4_max_mbs_allowed = MAX_MBS_LEVEL_32; 432 break; 433 case H264_LEVEL_4_0: 434 u4_max_mbs_allowed = MAX_MBS_LEVEL_40; 435 break; 436 case H264_LEVEL_4_1: 437 u4_max_mbs_allowed = MAX_MBS_LEVEL_41; 438 break; 439 case H264_LEVEL_4_2: 440 u4_max_mbs_allowed = MAX_MBS_LEVEL_42; 441 break; 442 case H264_LEVEL_5_0: 443 u4_max_mbs_allowed = MAX_MBS_LEVEL_50; 444 break; 445 case H264_LEVEL_5_1: 446 default: 447 u4_max_mbs_allowed = MAX_MBS_LEVEL_51; 448 break; 449 450 } 451 452 /*correct of the level is incorrect*/ 453 if(u4_total_mbs > u4_max_mbs_allowed) 454 { 455 if(u4_total_mbs > MAX_MBS_LEVEL_50) 456 u4_level_idc = H264_LEVEL_5_1; 457 else if(u4_total_mbs > MAX_MBS_LEVEL_42) 458 u4_level_idc = H264_LEVEL_5_0; 459 else if(u4_total_mbs > MAX_MBS_LEVEL_41) 460 u4_level_idc = H264_LEVEL_4_2; 461 else if(u4_total_mbs > MAX_MBS_LEVEL_40) 462 u4_level_idc = H264_LEVEL_4_1; 463 else if(u4_total_mbs > MAX_MBS_LEVEL_32) 464 u4_level_idc = H264_LEVEL_4_0; 465 else if(u4_total_mbs > MAX_MBS_LEVEL_31) 466 u4_level_idc = H264_LEVEL_3_2; 467 else if(u4_total_mbs > MAX_MBS_LEVEL_30) 468 u4_level_idc = H264_LEVEL_3_1; 469 else if(u4_total_mbs > MAX_MBS_LEVEL_21) 470 u4_level_idc = H264_LEVEL_3_0; 471 else if(u4_total_mbs > MAX_MBS_LEVEL_20) 472 u4_level_idc = H264_LEVEL_2_1; 473 else if(u4_total_mbs > MAX_MBS_LEVEL_10) 474 u4_level_idc = H264_LEVEL_2_0; 475 } 476 477 return (u4_level_idc); 478 479 } 480 WORD32 ih264d_parse_sps(dec_struct_t *ps_dec, dec_bit_stream_t *ps_bitstrm) 481 { 482 UWORD8 i; 483 dec_seq_params_t *ps_seq = NULL; 484 UWORD8 u1_profile_idc, u1_level_idc, u1_seq_parameter_set_id, u1_mb_aff_flag = 0; 485 UWORD16 i2_max_frm_num; 486 UWORD32 *pu4_bitstrm_buf = ps_bitstrm->pu4_buffer; 487 UWORD32 *pu4_bitstrm_ofst = &ps_bitstrm->u4_ofst; 488 UWORD8 u1_frm, uc_constraint_set0_flag, uc_constraint_set1_flag; 489 WORD32 i4_cropped_ht, i4_cropped_wd; 490 UWORD32 u4_temp; 491 WORD32 pic_height_in_map_units_minus1 = 0; 492 UWORD32 u2_pic_wd = 0; 493 UWORD32 u2_pic_ht = 0; 494 UWORD32 u2_frm_wd_y = 0; 495 UWORD32 u2_frm_ht_y = 0; 496 UWORD32 u2_frm_wd_uv = 0; 497 UWORD32 u2_frm_ht_uv = 0; 498 UWORD32 u2_crop_offset_y = 0; 499 UWORD32 u2_crop_offset_uv = 0; 500 WORD32 ret; 501 UWORD32 u4_num_reorder_frames; 502 /* High profile related syntax element */ 503 WORD32 i4_i; 504 /* G050 */ 505 UWORD8 u1_frame_cropping_flag, u1_frame_cropping_rect_left_ofst, 506 u1_frame_cropping_rect_right_ofst, 507 u1_frame_cropping_rect_top_ofst, 508 u1_frame_cropping_rect_bottom_ofst; 509 /* G050 */ 510 /*--------------------------------------------------------------------*/ 511 /* Decode seq_parameter_set_id and profile and level values */ 512 /*--------------------------------------------------------------------*/ 513 SWITCHONTRACE; 514 u1_profile_idc = ih264d_get_bits_h264(ps_bitstrm, 8); 515 COPYTHECONTEXT("SPS: profile_idc",u1_profile_idc); 516 517 /* G050 */ 518 uc_constraint_set0_flag = ih264d_get_bit_h264(ps_bitstrm); 519 uc_constraint_set1_flag = ih264d_get_bit_h264(ps_bitstrm); 520 ih264d_get_bit_h264(ps_bitstrm); 521 522 /*****************************************************/ 523 /* Read 5 bits for uc_constraint_set3_flag (1 bit) */ 524 /* and reserved_zero_4bits (4 bits) - Sushant */ 525 /*****************************************************/ 526 ih264d_get_bits_h264(ps_bitstrm, 5); 527 /* G050 */ 528 529 /* Check whether particular profile is suported or not */ 530 /* Check whether particular profile is suported or not */ 531 if((u1_profile_idc != MAIN_PROFILE_IDC) && 532 533 (u1_profile_idc != BASE_PROFILE_IDC) && 534 535 (u1_profile_idc != HIGH_PROFILE_IDC) 536 537 ) 538 { 539 540 /* Apart from Baseline, main and high profile, 541 * only extended profile is supported provided 542 * uc_constraint_set0_flag or uc_constraint_set1_flag are set to 1 543 */ 544 if((u1_profile_idc != EXTENDED_PROFILE_IDC) || 545 ((uc_constraint_set1_flag != 1) && (uc_constraint_set0_flag != 1))) 546 { 547 return (ERROR_FEATURE_UNAVAIL); 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 memset(ps_seq, 0, sizeof(dec_seq_params_t)); 570 571 if(ps_dec->i4_header_decoded & 1) 572 { 573 *ps_seq = *ps_dec->ps_cur_sps; 574 } 575 576 577 if((ps_dec->i4_header_decoded & 1) && (ps_seq->u1_profile_idc != u1_profile_idc)) 578 { 579 ps_dec->u1_res_changed = 1; 580 return IVD_RES_CHANGED; 581 } 582 583 if((ps_dec->i4_header_decoded & 1) && (ps_seq->u1_level_idc != u1_level_idc)) 584 { 585 ps_dec->u1_res_changed = 1; 586 return IVD_RES_CHANGED; 587 } 588 589 ps_seq->u1_profile_idc = u1_profile_idc; 590 ps_seq->u1_level_idc = u1_level_idc; 591 ps_seq->u1_seq_parameter_set_id = u1_seq_parameter_set_id; 592 593 /*******************************************************************/ 594 /* Initializations for high profile - Sushant */ 595 /*******************************************************************/ 596 ps_seq->i4_chroma_format_idc = 1; 597 ps_seq->i4_bit_depth_luma_minus8 = 0; 598 ps_seq->i4_bit_depth_chroma_minus8 = 0; 599 ps_seq->i4_qpprime_y_zero_transform_bypass_flag = 0; 600 ps_seq->i4_seq_scaling_matrix_present_flag = 0; 601 if(u1_profile_idc == HIGH_PROFILE_IDC) 602 { 603 604 /* reading chroma_format_idc */ 605 ps_seq->i4_chroma_format_idc = ih264d_uev(pu4_bitstrm_ofst, 606 pu4_bitstrm_buf); 607 608 /* Monochrome is not supported */ 609 if(ps_seq->i4_chroma_format_idc != 1) 610 { 611 return ERROR_INV_SPS_PPS_T; 612 } 613 614 /* reading bit_depth_luma_minus8 */ 615 ps_seq->i4_bit_depth_luma_minus8 = ih264d_uev(pu4_bitstrm_ofst, 616 pu4_bitstrm_buf); 617 618 if(ps_seq->i4_bit_depth_luma_minus8 != 0) 619 { 620 return ERROR_INV_SPS_PPS_T; 621 } 622 623 /* reading bit_depth_chroma_minus8 */ 624 ps_seq->i4_bit_depth_chroma_minus8 = ih264d_uev(pu4_bitstrm_ofst, 625 pu4_bitstrm_buf); 626 627 if(ps_seq->i4_bit_depth_chroma_minus8 != 0) 628 { 629 return ERROR_INV_SPS_PPS_T; 630 } 631 632 /* reading qpprime_y_zero_transform_bypass_flag */ 633 ps_seq->i4_qpprime_y_zero_transform_bypass_flag = 634 (WORD32)ih264d_get_bit_h264(ps_bitstrm); 635 636 if(ps_seq->i4_qpprime_y_zero_transform_bypass_flag != 0) 637 { 638 return ERROR_INV_SPS_PPS_T; 639 } 640 641 /* reading seq_scaling_matrix_present_flag */ 642 ps_seq->i4_seq_scaling_matrix_present_flag = 643 (WORD32)ih264d_get_bit_h264(ps_bitstrm); 644 645 if(ps_seq->i4_seq_scaling_matrix_present_flag) 646 { 647 for(i4_i = 0; i4_i < 8; i4_i++) 648 { 649 ps_seq->u1_seq_scaling_list_present_flag[i4_i] = 650 ih264d_get_bit_h264(ps_bitstrm); 651 652 /* initialize u1_use_default_scaling_matrix_flag[i4_i] to zero */ 653 /* before calling scaling list */ 654 ps_seq->u1_use_default_scaling_matrix_flag[i4_i] = 0; 655 656 if(ps_seq->u1_seq_scaling_list_present_flag[i4_i]) 657 { 658 if(i4_i < 6) 659 { 660 ih264d_scaling_list( 661 ps_seq->i2_scalinglist4x4[i4_i], 662 16, 663 &ps_seq->u1_use_default_scaling_matrix_flag[i4_i], 664 ps_bitstrm); 665 } 666 else 667 { 668 ih264d_scaling_list( 669 ps_seq->i2_scalinglist8x8[i4_i - 6], 670 64, 671 &ps_seq->u1_use_default_scaling_matrix_flag[i4_i], 672 ps_bitstrm); 673 } 674 } 675 } 676 } 677 } 678 /*--------------------------------------------------------------------*/ 679 /* Decode MaxFrameNum */ 680 /*--------------------------------------------------------------------*/ 681 u4_temp = 4 + ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf); 682 if(u4_temp > MAX_BITS_IN_FRAME_NUM) 683 { 684 return ERROR_INV_SPS_PPS_T; 685 } 686 ps_seq->u1_bits_in_frm_num = u4_temp; 687 COPYTHECONTEXT("SPS: log2_max_frame_num_minus4", 688 (ps_seq->u1_bits_in_frm_num - 4)); 689 690 i2_max_frm_num = (1 << (ps_seq->u1_bits_in_frm_num)); 691 ps_seq->u2_u4_max_pic_num_minus1 = i2_max_frm_num - 1; 692 /*--------------------------------------------------------------------*/ 693 /* Decode picture order count and related values */ 694 /*--------------------------------------------------------------------*/ 695 u4_temp = ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf); 696 697 if(u4_temp > MAX_PIC_ORDER_CNT_TYPE) 698 { 699 return ERROR_INV_POC_TYPE_T; 700 } 701 ps_seq->u1_pic_order_cnt_type = u4_temp; 702 COPYTHECONTEXT("SPS: pic_order_cnt_type",ps_seq->u1_pic_order_cnt_type); 703 704 ps_seq->u1_num_ref_frames_in_pic_order_cnt_cycle = 1; 705 if(ps_seq->u1_pic_order_cnt_type == 0) 706 { 707 u4_temp = 4 + ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf); 708 if(u4_temp > MAX_BITS_IN_POC_LSB) 709 { 710 return ERROR_INV_SPS_PPS_T; 711 } 712 ps_seq->u1_log2_max_pic_order_cnt_lsb_minus = u4_temp; 713 ps_seq->i4_max_pic_order_cntLsb = (1 << u4_temp); 714 COPYTHECONTEXT("SPS: log2_max_pic_order_cnt_lsb_minus4",(u4_temp - 4)); 715 } 716 else if(ps_seq->u1_pic_order_cnt_type == 1) 717 { 718 ps_seq->u1_delta_pic_order_always_zero_flag = ih264d_get_bit_h264( 719 ps_bitstrm); 720 COPYTHECONTEXT("SPS: delta_pic_order_always_zero_flag", 721 ps_seq->u1_delta_pic_order_always_zero_flag); 722 723 ps_seq->i4_ofst_for_non_ref_pic = ih264d_sev(pu4_bitstrm_ofst, 724 pu4_bitstrm_buf); 725 COPYTHECONTEXT("SPS: offset_for_non_ref_pic", 726 ps_seq->i4_ofst_for_non_ref_pic); 727 728 ps_seq->i4_ofst_for_top_to_bottom_field = ih264d_sev( 729 pu4_bitstrm_ofst, pu4_bitstrm_buf); 730 COPYTHECONTEXT("SPS: offset_for_top_to_bottom_field", 731 ps_seq->i4_ofst_for_top_to_bottom_field); 732 733 u4_temp = ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf); 734 if(u4_temp > 255) 735 return ERROR_INV_SPS_PPS_T; 736 ps_seq->u1_num_ref_frames_in_pic_order_cnt_cycle = u4_temp; 737 COPYTHECONTEXT("SPS: num_ref_frames_in_pic_order_cnt_cycle", 738 ps_seq->u1_num_ref_frames_in_pic_order_cnt_cycle); 739 740 for(i = 0; i < ps_seq->u1_num_ref_frames_in_pic_order_cnt_cycle; i++) 741 { 742 ps_seq->i4_ofst_for_ref_frame[i] = ih264d_sev( 743 pu4_bitstrm_ofst, pu4_bitstrm_buf); 744 COPYTHECONTEXT("SPS: offset_for_ref_frame", 745 ps_seq->i4_ofst_for_ref_frame[i]); 746 } 747 } 748 749 u4_temp = ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf); 750 751 if((u4_temp > H264_MAX_REF_PICS)) 752 { 753 return ERROR_NUM_REF; 754 } 755 756 /* Compare with older num_ref_frames is header is already once */ 757 if((ps_dec->i4_header_decoded & 1) && (ps_seq->u1_num_ref_frames != u4_temp)) 758 { 759 ps_dec->u1_res_changed = 1; 760 return IVD_RES_CHANGED; 761 } 762 763 ps_seq->u1_num_ref_frames = u4_temp; 764 COPYTHECONTEXT("SPS: num_ref_frames",ps_seq->u1_num_ref_frames); 765 766 ps_seq->u1_gaps_in_frame_num_value_allowed_flag = ih264d_get_bit_h264( 767 ps_bitstrm); 768 COPYTHECONTEXT("SPS: gaps_in_frame_num_value_allowed_flag", 769 ps_seq->u1_gaps_in_frame_num_value_allowed_flag); 770 771 /*--------------------------------------------------------------------*/ 772 /* Decode FrameWidth and FrameHeight and related values */ 773 /*--------------------------------------------------------------------*/ 774 ps_seq->u2_frm_wd_in_mbs = 1 775 + ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf); 776 COPYTHECONTEXT("SPS: pic_width_in_mbs_minus1", 777 ps_seq->u2_frm_wd_in_mbs - 1); 778 u2_pic_wd = (ps_seq->u2_frm_wd_in_mbs << 4); 779 780 pic_height_in_map_units_minus1 = ih264d_uev(pu4_bitstrm_ofst, 781 pu4_bitstrm_buf); 782 ps_seq->u2_frm_ht_in_mbs = 1 + pic_height_in_map_units_minus1; 783 784 u2_pic_ht = (ps_seq->u2_frm_ht_in_mbs << 4); 785 786 /*--------------------------------------------------------------------*/ 787 /* Get the value of MaxMbAddress and Number of bits needed for it */ 788 /*--------------------------------------------------------------------*/ 789 ps_seq->u2_max_mb_addr = (ps_seq->u2_frm_wd_in_mbs 790 * ps_seq->u2_frm_ht_in_mbs) - 1; 791 792 ps_seq->u2_total_num_of_mbs = ps_seq->u2_max_mb_addr + 1; 793 794 ps_seq->u1_level_idc = ih264d_correct_level_idc( 795 u1_level_idc, ps_seq->u2_total_num_of_mbs); 796 797 u1_frm = ih264d_get_bit_h264(ps_bitstrm); 798 if((ps_dec->i4_header_decoded & 1) && (ps_seq->u1_frame_mbs_only_flag != u1_frm)) 799 { 800 ps_dec->u1_res_changed = 1; 801 return IVD_RES_CHANGED; 802 } 803 804 ps_seq->u1_frame_mbs_only_flag = u1_frm; 805 806 COPYTHECONTEXT("SPS: frame_mbs_only_flag", u1_frm); 807 808 if(!u1_frm) 809 u1_mb_aff_flag = ih264d_get_bit_h264(ps_bitstrm); 810 811 if((ps_dec->i4_header_decoded & 1) 812 && (ps_seq->u1_mb_aff_flag != u1_mb_aff_flag)) 813 { 814 ps_dec->u1_res_changed = 1; 815 return IVD_RES_CHANGED; 816 } 817 818 if(!u1_frm) 819 { 820 u2_pic_ht <<= 1; 821 ps_seq->u1_mb_aff_flag = u1_mb_aff_flag; 822 COPYTHECONTEXT("SPS: mb_adaptive_frame_field_flag", 823 ps_seq->u1_mb_aff_flag); 824 825 } 826 else 827 ps_seq->u1_mb_aff_flag = 0; 828 829 ps_seq->u1_direct_8x8_inference_flag = ih264d_get_bit_h264(ps_bitstrm); 830 831 COPYTHECONTEXT("SPS: direct_8x8_inference_flag", 832 ps_seq->u1_direct_8x8_inference_flag); 833 834 /* G050 */ 835 u1_frame_cropping_flag = ih264d_get_bit_h264(ps_bitstrm); 836 COPYTHECONTEXT("SPS: frame_cropping_flag",u1_frame_cropping_flag); 837 838 if(u1_frame_cropping_flag) 839 { 840 u1_frame_cropping_rect_left_ofst = ih264d_uev(pu4_bitstrm_ofst, 841 pu4_bitstrm_buf); 842 COPYTHECONTEXT("SPS: frame_cropping_rect_left_offset", 843 u1_frame_cropping_rect_left_ofst); 844 u1_frame_cropping_rect_right_ofst = ih264d_uev(pu4_bitstrm_ofst, 845 pu4_bitstrm_buf); 846 COPYTHECONTEXT("SPS: frame_cropping_rect_right_offset", 847 u1_frame_cropping_rect_right_ofst); 848 u1_frame_cropping_rect_top_ofst = ih264d_uev(pu4_bitstrm_ofst, 849 pu4_bitstrm_buf); 850 COPYTHECONTEXT("SPS: frame_cropping_rect_top_offset", 851 u1_frame_cropping_rect_top_ofst); 852 u1_frame_cropping_rect_bottom_ofst = ih264d_uev(pu4_bitstrm_ofst, 853 pu4_bitstrm_buf); 854 COPYTHECONTEXT("SPS: frame_cropping_rect_bottom_offset", 855 u1_frame_cropping_rect_bottom_ofst); 856 } 857 /* G050 */ 858 859 ps_seq->u1_vui_parameters_present_flag = ih264d_get_bit_h264(ps_bitstrm); 860 COPYTHECONTEXT("SPS: vui_parameters_present_flag", 861 ps_seq->u1_vui_parameters_present_flag); 862 863 u2_frm_wd_y = u2_pic_wd + (UWORD8)(PAD_LEN_Y_H << 1); 864 if(1 == ps_dec->u4_share_disp_buf) 865 { 866 if(ps_dec->u4_app_disp_width > u2_frm_wd_y) 867 u2_frm_wd_y = ps_dec->u4_app_disp_width; 868 } 869 870 u2_frm_ht_y = u2_pic_ht + (UWORD8)(PAD_LEN_Y_V << 2); 871 u2_frm_wd_uv = u2_pic_wd + (UWORD8)(PAD_LEN_UV_H << 2); 872 u2_frm_wd_uv = MAX(u2_frm_wd_uv, u2_frm_wd_y); 873 874 u2_frm_ht_uv = (u2_pic_ht >> 1) + (UWORD8)(PAD_LEN_UV_V << 2); 875 u2_frm_ht_uv = MAX(u2_frm_ht_uv, (u2_frm_ht_y >> 1)); 876 877 878 /* Calculate display picture width, height and start u4_ofst from YUV420 */ 879 /* pictute buffers as per cropping information parsed above */ 880 { 881 UWORD16 u2_rgt_ofst = 0; 882 UWORD16 u2_lft_ofst = 0; 883 UWORD16 u2_top_ofst = 0; 884 UWORD16 u2_btm_ofst = 0; 885 UWORD8 u1_frm_mbs_flag; 886 UWORD8 u1_vert_mult_factor; 887 888 if(u1_frame_cropping_flag) 889 { 890 /* Calculate right and left u4_ofst for cropped picture */ 891 u2_rgt_ofst = u1_frame_cropping_rect_right_ofst << 1; 892 u2_lft_ofst = u1_frame_cropping_rect_left_ofst << 1; 893 894 /* Know frame MBs only u4_flag */ 895 u1_frm_mbs_flag = (1 == ps_seq->u1_frame_mbs_only_flag); 896 897 /* Simplify the vertical u4_ofst calculation from field/frame */ 898 u1_vert_mult_factor = (2 - u1_frm_mbs_flag); 899 900 /* Calculate bottom and top u4_ofst for cropped picture */ 901 u2_btm_ofst = (u1_frame_cropping_rect_bottom_ofst 902 << u1_vert_mult_factor); 903 u2_top_ofst = (u1_frame_cropping_rect_top_ofst 904 << u1_vert_mult_factor); 905 } 906 907 /* Calculate u4_ofst from start of YUV 420 picture buffer to start of*/ 908 /* cropped picture buffer */ 909 u2_crop_offset_y = (u2_frm_wd_y * u2_top_ofst) + (u2_lft_ofst); 910 u2_crop_offset_uv = (u2_frm_wd_uv * (u2_top_ofst >> 1)) 911 + (u2_lft_ofst >> 1) * YUV420SP_FACTOR; 912 /* Calculate the display picture width and height based on crop */ 913 /* information */ 914 i4_cropped_ht = u2_pic_ht - (u2_btm_ofst + u2_top_ofst); 915 i4_cropped_wd = u2_pic_wd - (u2_rgt_ofst + u2_lft_ofst); 916 917 if((i4_cropped_ht < MB_SIZE) || (i4_cropped_wd < MB_SIZE)) 918 { 919 return ERROR_INV_SPS_PPS_T; 920 } 921 922 if((ps_dec->i4_header_decoded & 1) && (ps_dec->u2_pic_wd != u2_pic_wd)) 923 { 924 ps_dec->u1_res_changed = 1; 925 return IVD_RES_CHANGED; 926 } 927 if((ps_dec->i4_header_decoded & 1) && (ps_dec->u2_pic_ht != u2_pic_ht)) 928 { 929 ps_dec->u1_res_changed = 1; 930 return IVD_RES_CHANGED; 931 } 932 933 /* Check for unsupported resolutions */ 934 if((u2_pic_wd > H264_MAX_FRAME_WIDTH) || (u2_pic_ht > H264_MAX_FRAME_HEIGHT) 935 || (u2_pic_wd < H264_MIN_FRAME_WIDTH) || (u2_pic_ht < H264_MIN_FRAME_HEIGHT) 936 || (u2_pic_wd * (UWORD32)u2_pic_ht > H264_MAX_FRAME_SIZE)) 937 { 938 return IVD_STREAM_WIDTH_HEIGHT_NOT_SUPPORTED; 939 } 940 941 /* If MBAff is enabled, decoder support is limited to streams with 942 * width less than half of H264_MAX_FRAME_WIDTH. 943 * In case of MBAff decoder processes two rows at a time 944 */ 945 if((u2_pic_wd << ps_seq->u1_mb_aff_flag) > H264_MAX_FRAME_WIDTH) 946 { 947 return IVD_STREAM_WIDTH_HEIGHT_NOT_SUPPORTED; 948 } 949 950 } 951 952 /* Backup u4_num_reorder_frames if header is already decoded */ 953 if((ps_dec->i4_header_decoded & 1) && 954 (1 == ps_seq->u1_vui_parameters_present_flag) && 955 (1 == ps_seq->s_vui.u1_bitstream_restriction_flag)) 956 { 957 u4_num_reorder_frames = ps_seq->s_vui.u4_num_reorder_frames; 958 } 959 else 960 { 961 u4_num_reorder_frames = -1; 962 } 963 if(1 == ps_seq->u1_vui_parameters_present_flag) 964 { 965 ret = ih264d_parse_vui_parametres(&ps_seq->s_vui, ps_bitstrm); 966 if(ret != OK) 967 return ret; 968 } 969 970 /* Compare older u4_num_reorder_frames with the new one if header is already decoded */ 971 if((ps_dec->i4_header_decoded & 1) && 972 (-1 != (WORD32)u4_num_reorder_frames) && 973 (1 == ps_seq->u1_vui_parameters_present_flag) && 974 (1 == ps_seq->s_vui.u1_bitstream_restriction_flag) && 975 (ps_seq->s_vui.u4_num_reorder_frames != u4_num_reorder_frames)) 976 { 977 ps_dec->u1_res_changed = 1; 978 return IVD_RES_CHANGED; 979 } 980 981 /* In case bitstream read has exceeded the filled size, then 982 return an error */ 983 if (ps_bitstrm->u4_ofst > ps_bitstrm->u4_max_ofst) 984 { 985 return ERROR_INV_SPS_PPS_T; 986 } 987 988 /*--------------------------------------------------------------------*/ 989 /* All initializations to ps_dec are beyond this point */ 990 /*--------------------------------------------------------------------*/ 991 ps_dec->u2_disp_height = i4_cropped_ht; 992 ps_dec->u2_disp_width = i4_cropped_wd; 993 994 ps_dec->u2_pic_wd = u2_pic_wd; 995 ps_dec->u2_pic_ht = u2_pic_ht; 996 997 /* Determining the Width and Height of Frame from that of Picture */ 998 ps_dec->u2_frm_wd_y = u2_frm_wd_y; 999 ps_dec->u2_frm_ht_y = u2_frm_ht_y; 1000 1001 ps_dec->u2_frm_wd_uv = u2_frm_wd_uv; 1002 ps_dec->u2_frm_ht_uv = u2_frm_ht_uv; 1003 ps_dec->s_pad_mgr.u1_pad_len_y_v = (UWORD8)(PAD_LEN_Y_V << (1 - u1_frm)); 1004 ps_dec->s_pad_mgr.u1_pad_len_cr_v = (UWORD8)(PAD_LEN_UV_V << (1 - u1_frm)); 1005 1006 ps_dec->u2_frm_wd_in_mbs = ps_seq->u2_frm_wd_in_mbs; 1007 ps_dec->u2_frm_ht_in_mbs = ps_seq->u2_frm_ht_in_mbs; 1008 1009 ps_dec->u2_crop_offset_y = u2_crop_offset_y; 1010 ps_dec->u2_crop_offset_uv = u2_crop_offset_uv; 1011 1012 ps_seq->u1_is_valid = TRUE; 1013 ps_dec->ps_sps[u1_seq_parameter_set_id] = *ps_seq; 1014 ps_dec->ps_cur_sps = &ps_dec->ps_sps[u1_seq_parameter_set_id]; 1015 1016 return OK; 1017 } 1018 1019 /*! 1020 ************************************************************************** 1021 * \if Function name : ih264d_parse_end_of_sequence \endif 1022 * 1023 * \brief 1024 * Decodes End of Sequence. 1025 * 1026 * \param ps_bitstrm : Pointer to bit ps_bitstrm containing the NAL unit 1027 * 1028 * \return 1029 * 0 on Success and error code otherwise 1030 ************************************************************************** 1031 */ 1032 WORD32 ih264d_parse_end_of_sequence(dec_struct_t * ps_dec) 1033 { 1034 WORD32 ret; 1035 1036 ret = ih264d_end_of_pic_processing(ps_dec); 1037 return ret; 1038 } 1039 1040 /*! 1041 ************************************************************************** 1042 * \if Function name : AcessUnitDelimiterRbsp \endif 1043 * 1044 * \brief 1045 * Decodes AcessUnitDelimiterRbsp. 1046 * 1047 * \param ps_bitstrm : Pointer to bit ps_bitstrm containing the NAL unit 1048 * 1049 * \return 1050 * 0 on Success and error code otherwise 1051 ************************************************************************** 1052 */ 1053 1054 WORD32 ih264d_access_unit_delimiter_rbsp(dec_struct_t * ps_dec) 1055 { 1056 UWORD8 u1_primary_pic_type; 1057 u1_primary_pic_type = ih264d_get_bits_h264(ps_dec->ps_bitstrm, 3); 1058 switch(u1_primary_pic_type) 1059 { 1060 case I_PIC: 1061 case SI_PIC: 1062 case ISI_PIC: 1063 ps_dec->ps_dec_err_status->u1_pic_aud_i = PIC_TYPE_I; 1064 break; 1065 default: 1066 ps_dec->ps_dec_err_status->u1_pic_aud_i = PIC_TYPE_UNKNOWN; 1067 } 1068 return (0); 1069 } 1070 /*! 1071 ************************************************************************** 1072 * \if Function name : ih264d_parse_nal_unit \endif 1073 * 1074 * \brief 1075 * Decodes NAL unit 1076 * 1077 * \return 1078 * 0 on Success and error code otherwise 1079 ************************************************************************** 1080 */ 1081 1082 WORD32 ih264d_parse_nal_unit(iv_obj_t *dec_hdl, 1083 ivd_video_decode_op_t *ps_dec_op, 1084 UWORD8 *pu1_buf, 1085 UWORD32 u4_length) 1086 { 1087 1088 dec_bit_stream_t *ps_bitstrm; 1089 1090 1091 dec_struct_t *ps_dec = (dec_struct_t *)dec_hdl->pv_codec_handle; 1092 ivd_video_decode_ip_t *ps_dec_in = 1093 (ivd_video_decode_ip_t *)ps_dec->pv_dec_in; 1094 dec_slice_params_t * ps_cur_slice = ps_dec->ps_cur_slice; 1095 UWORD8 u1_first_byte, u1_nal_ref_idc; 1096 UWORD8 u1_nal_unit_type; 1097 WORD32 i_status = OK; 1098 ps_bitstrm = ps_dec->ps_bitstrm; 1099 1100 if(pu1_buf) 1101 { 1102 if(u4_length) 1103 { 1104 ps_dec_op->u4_frame_decoded_flag = 0; 1105 ih264d_process_nal_unit(ps_dec->ps_bitstrm, pu1_buf, 1106 u4_length); 1107 1108 SWITCHOFFTRACE; 1109 u1_first_byte = ih264d_get_bits_h264(ps_bitstrm, 8); 1110 1111 if(NAL_FORBIDDEN_BIT(u1_first_byte)) 1112 { 1113 H264_DEC_DEBUG_PRINT("\nForbidden bit set in Nal Unit, Let's try\n"); 1114 } 1115 u1_nal_unit_type = NAL_UNIT_TYPE(u1_first_byte); 1116 // if any other nal unit other than slice nal is encountered in between a 1117 // frame break out of loop without consuming header 1118 if ((ps_dec->u4_slice_start_code_found == 1) 1119 && (ps_dec->u1_pic_decode_done != 1) 1120 && (u1_nal_unit_type > IDR_SLICE_NAL)) 1121 { 1122 return ERROR_INCOMPLETE_FRAME; 1123 } 1124 ps_dec->u1_nal_unit_type = u1_nal_unit_type; 1125 u1_nal_ref_idc = (UWORD8)(NAL_REF_IDC(u1_first_byte)); 1126 //Skip all NALUs if SPS and PPS are not decoded 1127 switch(u1_nal_unit_type) 1128 { 1129 case SLICE_DATA_PARTITION_A_NAL: 1130 case SLICE_DATA_PARTITION_B_NAL: 1131 case SLICE_DATA_PARTITION_C_NAL: 1132 if(!ps_dec->i4_decode_header) 1133 ih264d_parse_slice_partition(ps_dec, ps_bitstrm); 1134 1135 break; 1136 1137 case IDR_SLICE_NAL: 1138 case SLICE_NAL: 1139 1140 /* ! */ 1141 DEBUG_THREADS_PRINTF("Decoding a slice NAL\n"); 1142 if(!ps_dec->i4_decode_header) 1143 { 1144 if(ps_dec->i4_header_decoded == 3) 1145 { 1146 /* ! */ 1147 ps_dec->u4_slice_start_code_found = 1; 1148 1149 ih264d_rbsp_to_sodb(ps_dec->ps_bitstrm); 1150 1151 i_status = ih264d_parse_decode_slice( 1152 (UWORD8)(u1_nal_unit_type 1153 == IDR_SLICE_NAL), 1154 u1_nal_ref_idc, ps_dec); 1155 1156 if(i_status != OK) 1157 { 1158 return i_status; 1159 } 1160 } 1161 else 1162 { 1163 H264_DEC_DEBUG_PRINT( 1164 "\nSlice NAL Supplied but no header has been supplied\n"); 1165 } 1166 } 1167 break; 1168 1169 case SEI_NAL: 1170 if(!ps_dec->i4_decode_header) 1171 { 1172 ih264d_rbsp_to_sodb(ps_dec->ps_bitstrm); 1173 i_status = ih264d_parse_sei_message(ps_dec, ps_bitstrm); 1174 if(i_status != OK) 1175 return i_status; 1176 ih264d_parse_sei(ps_dec, ps_bitstrm); 1177 } 1178 break; 1179 case SEQ_PARAM_NAL: 1180 /* ! */ 1181 ih264d_rbsp_to_sodb(ps_dec->ps_bitstrm); 1182 i_status = ih264d_parse_sps(ps_dec, ps_bitstrm); 1183 ps_dec->u4_sps_cnt_in_process++; 1184 /*If a resolution change happens within a process call, due to multiple sps 1185 * we will not support it. 1186 */ 1187 if((ps_dec->u4_sps_cnt_in_process > 1 ) && 1188 (i_status == IVD_RES_CHANGED)) 1189 { 1190 i_status = ERROR_INV_SPS_PPS_T; 1191 ps_dec->u1_res_changed = 0; 1192 } 1193 if(i_status == ERROR_INV_SPS_PPS_T) 1194 return i_status; 1195 if(!i_status) 1196 ps_dec->i4_header_decoded |= 0x1; 1197 break; 1198 1199 case PIC_PARAM_NAL: 1200 /* ! */ 1201 ih264d_rbsp_to_sodb(ps_dec->ps_bitstrm); 1202 i_status = ih264d_parse_pps(ps_dec, ps_bitstrm); 1203 if(i_status == ERROR_INV_SPS_PPS_T) 1204 return i_status; 1205 if(!i_status) 1206 ps_dec->i4_header_decoded |= 0x2; 1207 break; 1208 case ACCESS_UNIT_DELIMITER_RBSP: 1209 if(!ps_dec->i4_decode_header) 1210 { 1211 ih264d_access_unit_delimiter_rbsp(ps_dec); 1212 } 1213 break; 1214 //Let us ignore the END_OF_SEQ_RBSP NAL and decode even after this NAL 1215 case END_OF_STREAM_RBSP: 1216 if(!ps_dec->i4_decode_header) 1217 { 1218 ih264d_parse_end_of_stream(ps_dec); 1219 } 1220 break; 1221 case FILLER_DATA_NAL: 1222 if(!ps_dec->i4_decode_header) 1223 { 1224 ih264d_parse_filler_data(ps_dec, ps_bitstrm); 1225 } 1226 break; 1227 default: 1228 H264_DEC_DEBUG_PRINT("\nUnknown NAL type %d\n", u1_nal_unit_type); 1229 break; 1230 } 1231 1232 } 1233 1234 } 1235 1236 return i_status; 1237 1238 } 1239 1240
