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 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 /*****************************************************************************/ 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 /*****************************************************************************/ 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 /*****************************************************************************/ 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 */ 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 i_temp = ih264d_sev( 365 pu4_bitstrm_ofst, pu4_bitstrm_buf); 366 367 if((i_temp < -12) || (i_temp > 12)) 368 return ERROR_INV_RANGE_QP_T; 369 370 ps_pps->i1_second_chroma_qp_index_offset = i_temp; 371 } 372 373 /* In case bitstream read has exceeded the filled size, then 374 return an error */ 375 if(ps_bitstrm->u4_ofst > ps_bitstrm->u4_max_ofst + 8) 376 { 377 return ERROR_INV_SPS_PPS_T; 378 } 379 ps_pps->u1_is_valid = TRUE; 380 ps_dec->ps_pps[ps_pps->u1_pic_parameter_set_id] = *ps_pps; 381 return OK; 382 } 383 384 /*! 385 ************************************************************************** 386 * \if Function name : ih264d_parse_sps \endif 387 * 388 * \brief 389 * Decodes Sequence parameter set from the bitstream 390 * 391 * \return 392 * 0 on Success and Error code otherwise 393 ************************************************************************** 394 */ 395 UWORD32 ih264d_correct_level_idc(UWORD32 u4_level_idc, UWORD32 u4_total_mbs) 396 { 397 UWORD32 u4_max_mbs_allowed; 398 399 switch(u4_level_idc) 400 { 401 case H264_LEVEL_1_0: 402 u4_max_mbs_allowed = MAX_MBS_LEVEL_10; 403 break; 404 case H264_LEVEL_1_1: 405 u4_max_mbs_allowed = MAX_MBS_LEVEL_11; 406 break; 407 case H264_LEVEL_1_2: 408 u4_max_mbs_allowed = MAX_MBS_LEVEL_12; 409 break; 410 case H264_LEVEL_1_3: 411 u4_max_mbs_allowed = MAX_MBS_LEVEL_13; 412 break; 413 case H264_LEVEL_2_0: 414 u4_max_mbs_allowed = MAX_MBS_LEVEL_20; 415 break; 416 case H264_LEVEL_2_1: 417 u4_max_mbs_allowed = MAX_MBS_LEVEL_21; 418 break; 419 case H264_LEVEL_2_2: 420 u4_max_mbs_allowed = MAX_MBS_LEVEL_22; 421 break; 422 case H264_LEVEL_3_0: 423 u4_max_mbs_allowed = MAX_MBS_LEVEL_30; 424 break; 425 case H264_LEVEL_3_1: 426 u4_max_mbs_allowed = MAX_MBS_LEVEL_31; 427 break; 428 case H264_LEVEL_3_2: 429 u4_max_mbs_allowed = MAX_MBS_LEVEL_32; 430 break; 431 case H264_LEVEL_4_0: 432 u4_max_mbs_allowed = MAX_MBS_LEVEL_40; 433 break; 434 case H264_LEVEL_4_1: 435 u4_max_mbs_allowed = MAX_MBS_LEVEL_41; 436 break; 437 case H264_LEVEL_4_2: 438 u4_max_mbs_allowed = MAX_MBS_LEVEL_42; 439 break; 440 case H264_LEVEL_5_0: 441 u4_max_mbs_allowed = MAX_MBS_LEVEL_50; 442 break; 443 case H264_LEVEL_5_1: 444 default: 445 u4_max_mbs_allowed = MAX_MBS_LEVEL_51; 446 break; 447 448 } 449 450 /*correct of the level is incorrect*/ 451 if(u4_total_mbs > u4_max_mbs_allowed) 452 { 453 if(u4_total_mbs > MAX_MBS_LEVEL_50) 454 u4_level_idc = H264_LEVEL_5_1; 455 else if(u4_total_mbs > MAX_MBS_LEVEL_42) 456 u4_level_idc = H264_LEVEL_5_0; 457 else if(u4_total_mbs > MAX_MBS_LEVEL_41) 458 u4_level_idc = H264_LEVEL_4_2; 459 else if(u4_total_mbs > MAX_MBS_LEVEL_40) 460 u4_level_idc = H264_LEVEL_4_1; 461 else if(u4_total_mbs > MAX_MBS_LEVEL_32) 462 u4_level_idc = H264_LEVEL_4_0; 463 else if(u4_total_mbs > MAX_MBS_LEVEL_31) 464 u4_level_idc = H264_LEVEL_3_2; 465 else if(u4_total_mbs > MAX_MBS_LEVEL_30) 466 u4_level_idc = H264_LEVEL_3_1; 467 else if(u4_total_mbs > MAX_MBS_LEVEL_21) 468 u4_level_idc = H264_LEVEL_3_0; 469 else if(u4_total_mbs > MAX_MBS_LEVEL_20) 470 u4_level_idc = H264_LEVEL_2_1; 471 else if(u4_total_mbs > MAX_MBS_LEVEL_10) 472 u4_level_idc = H264_LEVEL_2_0; 473 } 474 475 return (u4_level_idc); 476 477 } 478 WORD32 ih264d_parse_sps(dec_struct_t *ps_dec, dec_bit_stream_t *ps_bitstrm) 479 { 480 UWORD8 i; 481 dec_seq_params_t *ps_seq = NULL; 482 UWORD8 u1_profile_idc, u1_level_idc, u1_seq_parameter_set_id; 483 UWORD16 i2_max_frm_num; 484 UWORD32 *pu4_bitstrm_buf = ps_bitstrm->pu4_buffer; 485 UWORD32 *pu4_bitstrm_ofst = &ps_bitstrm->u4_ofst; 486 UWORD8 u1_frm, uc_constraint_set0_flag, uc_constraint_set1_flag; 487 WORD32 i4_cropped_ht, i4_cropped_wd; 488 UWORD32 u4_temp; 489 WORD32 pic_height_in_map_units_minus1 = 0; 490 UWORD32 u2_pic_wd = 0; 491 UWORD32 u2_pic_ht = 0; 492 UWORD32 u2_frm_wd_y = 0; 493 UWORD32 u2_frm_ht_y = 0; 494 UWORD32 u2_frm_wd_uv = 0; 495 UWORD32 u2_frm_ht_uv = 0; 496 UWORD32 u2_crop_offset_y = 0; 497 UWORD32 u2_crop_offset_uv = 0; 498 WORD32 ret; 499 UWORD32 u4_num_reorder_frames; 500 /* High profile related syntax element */ 501 WORD32 i4_i; 502 /* G050 */ 503 UWORD8 u1_frame_cropping_flag, u1_frame_cropping_rect_left_ofst, 504 u1_frame_cropping_rect_right_ofst, 505 u1_frame_cropping_rect_top_ofst, 506 u1_frame_cropping_rect_bottom_ofst; 507 /* G050 */ 508 /*--------------------------------------------------------------------*/ 509 /* Decode seq_parameter_set_id and profile and level values */ 510 /*--------------------------------------------------------------------*/ 511 SWITCHONTRACE; 512 u1_profile_idc = ih264d_get_bits_h264(ps_bitstrm, 8); 513 COPYTHECONTEXT("SPS: profile_idc",u1_profile_idc); 514 515 /* G050 */ 516 uc_constraint_set0_flag = ih264d_get_bit_h264(ps_bitstrm); 517 uc_constraint_set1_flag = ih264d_get_bit_h264(ps_bitstrm); 518 ih264d_get_bit_h264(ps_bitstrm); 519 520 /*****************************************************/ 521 /* Read 5 bits for uc_constraint_set3_flag (1 bit) */ 522 /* and reserved_zero_4bits (4 bits) - Sushant */ 523 /*****************************************************/ 524 ih264d_get_bits_h264(ps_bitstrm, 5); 525 /* G050 */ 526 527 /* Check whether particular profile is suported or not */ 528 /* Check whether particular profile is suported or not */ 529 if((u1_profile_idc != MAIN_PROFILE_IDC) && 530 531 (u1_profile_idc != BASE_PROFILE_IDC) && 532 533 (u1_profile_idc != HIGH_PROFILE_IDC) 534 535 ) 536 { 537 538 /* Apart from Baseline, main and high profile, 539 * only extended profile is supported provided 540 * uc_constraint_set0_flag or uc_constraint_set1_flag are set to 1 541 */ 542 if((u1_profile_idc != EXTENDED_PROFILE_IDC) || 543 ((uc_constraint_set1_flag != 1) && (uc_constraint_set0_flag != 1))) 544 { 545 return (ERROR_FEATURE_UNAVAIL); 546 } 547 } 548 549 u1_level_idc = ih264d_get_bits_h264(ps_bitstrm, 8); 550 551 552 553 COPYTHECONTEXT("SPS: u4_level_idc",u1_level_idc); 554 555 u4_temp = ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf); 556 if(u4_temp & MASK_ERR_SEQ_SET_ID) 557 return ERROR_INV_SPS_PPS_T; 558 u1_seq_parameter_set_id = u4_temp; 559 COPYTHECONTEXT("SPS: seq_parameter_set_id", 560 u1_seq_parameter_set_id); 561 562 /*--------------------------------------------------------------------*/ 563 /* Find an seq param entry in seqparam array of decStruct */ 564 /*--------------------------------------------------------------------*/ 565 566 ps_seq = ps_dec->pv_scratch_sps_pps; 567 if(ps_dec->i4_header_decoded & 1) 568 { 569 *ps_seq = *ps_dec->ps_cur_sps; 570 } 571 572 573 if((ps_dec->i4_header_decoded & 1) && (ps_seq->u1_profile_idc != u1_profile_idc)) 574 { 575 ps_dec->u1_res_changed = 1; 576 return IVD_RES_CHANGED; 577 } 578 579 if((ps_dec->i4_header_decoded & 1) && (ps_seq->u1_level_idc != u1_level_idc)) 580 { 581 ps_dec->u1_res_changed = 1; 582 return IVD_RES_CHANGED; 583 } 584 585 ps_seq->u1_profile_idc = u1_profile_idc; 586 ps_seq->u1_level_idc = u1_level_idc; 587 ps_seq->u1_seq_parameter_set_id = u1_seq_parameter_set_id; 588 589 /*******************************************************************/ 590 /* Initializations for high profile - Sushant */ 591 /*******************************************************************/ 592 ps_seq->i4_chroma_format_idc = 1; 593 ps_seq->i4_bit_depth_luma_minus8 = 0; 594 ps_seq->i4_bit_depth_chroma_minus8 = 0; 595 ps_seq->i4_qpprime_y_zero_transform_bypass_flag = 0; 596 ps_seq->i4_seq_scaling_matrix_present_flag = 0; 597 if(u1_profile_idc == HIGH_PROFILE_IDC) 598 { 599 600 /* reading chroma_format_idc */ 601 ps_seq->i4_chroma_format_idc = ih264d_uev(pu4_bitstrm_ofst, 602 pu4_bitstrm_buf); 603 604 /* Monochrome is not supported */ 605 if(ps_seq->i4_chroma_format_idc != 1) 606 { 607 return ERROR_INV_SPS_PPS_T; 608 } 609 610 /* reading bit_depth_luma_minus8 */ 611 ps_seq->i4_bit_depth_luma_minus8 = ih264d_uev(pu4_bitstrm_ofst, 612 pu4_bitstrm_buf); 613 614 if(ps_seq->i4_bit_depth_luma_minus8 != 0) 615 { 616 return ERROR_INV_SPS_PPS_T; 617 } 618 619 /* reading bit_depth_chroma_minus8 */ 620 ps_seq->i4_bit_depth_chroma_minus8 = ih264d_uev(pu4_bitstrm_ofst, 621 pu4_bitstrm_buf); 622 623 if(ps_seq->i4_bit_depth_chroma_minus8 != 0) 624 { 625 return ERROR_INV_SPS_PPS_T; 626 } 627 628 /* reading qpprime_y_zero_transform_bypass_flag */ 629 ps_seq->i4_qpprime_y_zero_transform_bypass_flag = 630 (WORD32)ih264d_get_bit_h264(ps_bitstrm); 631 632 if(ps_seq->i4_qpprime_y_zero_transform_bypass_flag != 0) 633 { 634 return ERROR_INV_SPS_PPS_T; 635 } 636 637 /* reading seq_scaling_matrix_present_flag */ 638 ps_seq->i4_seq_scaling_matrix_present_flag = 639 (WORD32)ih264d_get_bit_h264(ps_bitstrm); 640 641 if(ps_seq->i4_seq_scaling_matrix_present_flag) 642 { 643 for(i4_i = 0; i4_i < 8; i4_i++) 644 { 645 ps_seq->u1_seq_scaling_list_present_flag[i4_i] = 646 ih264d_get_bit_h264(ps_bitstrm); 647 648 /* initialize u1_use_default_scaling_matrix_flag[i4_i] to zero */ 649 /* before calling scaling list */ 650 ps_seq->u1_use_default_scaling_matrix_flag[i4_i] = 0; 651 652 if(ps_seq->u1_seq_scaling_list_present_flag[i4_i]) 653 { 654 if(i4_i < 6) 655 { 656 ih264d_scaling_list( 657 ps_seq->i2_scalinglist4x4[i4_i], 658 16, 659 &ps_seq->u1_use_default_scaling_matrix_flag[i4_i], 660 ps_bitstrm); 661 } 662 else 663 { 664 ih264d_scaling_list( 665 ps_seq->i2_scalinglist8x8[i4_i - 6], 666 64, 667 &ps_seq->u1_use_default_scaling_matrix_flag[i4_i], 668 ps_bitstrm); 669 } 670 } 671 } 672 } 673 } 674 /*--------------------------------------------------------------------*/ 675 /* Decode MaxFrameNum */ 676 /*--------------------------------------------------------------------*/ 677 u4_temp = 4 + ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf); 678 if(u4_temp > MAX_BITS_IN_FRAME_NUM) 679 { 680 return ERROR_INV_SPS_PPS_T; 681 } 682 ps_seq->u1_bits_in_frm_num = u4_temp; 683 COPYTHECONTEXT("SPS: log2_max_frame_num_minus4", 684 (ps_seq->u1_bits_in_frm_num - 4)); 685 686 i2_max_frm_num = (1 << (ps_seq->u1_bits_in_frm_num)); 687 ps_seq->u2_u4_max_pic_num_minus1 = i2_max_frm_num - 1; 688 /*--------------------------------------------------------------------*/ 689 /* Decode picture order count and related values */ 690 /*--------------------------------------------------------------------*/ 691 u4_temp = ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf); 692 693 if(u4_temp > MAX_PIC_ORDER_CNT_TYPE) 694 { 695 return ERROR_INV_POC_TYPE_T; 696 } 697 ps_seq->u1_pic_order_cnt_type = u4_temp; 698 COPYTHECONTEXT("SPS: pic_order_cnt_type",ps_seq->u1_pic_order_cnt_type); 699 700 ps_seq->u1_num_ref_frames_in_pic_order_cnt_cycle = 1; 701 if(ps_seq->u1_pic_order_cnt_type == 0) 702 { 703 u4_temp = 4 + ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf); 704 if(u4_temp > MAX_BITS_IN_POC_LSB) 705 { 706 return ERROR_INV_SPS_PPS_T; 707 } 708 ps_seq->u1_log2_max_pic_order_cnt_lsb_minus = u4_temp; 709 ps_seq->i4_max_pic_order_cntLsb = (1 << u4_temp); 710 COPYTHECONTEXT("SPS: log2_max_pic_order_cnt_lsb_minus4",(u4_temp - 4)); 711 } 712 else if(ps_seq->u1_pic_order_cnt_type == 1) 713 { 714 ps_seq->u1_delta_pic_order_always_zero_flag = ih264d_get_bit_h264( 715 ps_bitstrm); 716 COPYTHECONTEXT("SPS: delta_pic_order_always_zero_flag", 717 ps_seq->u1_delta_pic_order_always_zero_flag); 718 719 ps_seq->i4_ofst_for_non_ref_pic = ih264d_sev(pu4_bitstrm_ofst, 720 pu4_bitstrm_buf); 721 COPYTHECONTEXT("SPS: offset_for_non_ref_pic", 722 ps_seq->i4_ofst_for_non_ref_pic); 723 724 ps_seq->i4_ofst_for_top_to_bottom_field = ih264d_sev( 725 pu4_bitstrm_ofst, pu4_bitstrm_buf); 726 COPYTHECONTEXT("SPS: offset_for_top_to_bottom_field", 727 ps_seq->i4_ofst_for_top_to_bottom_field); 728 729 u4_temp = ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf); 730 if(u4_temp > 255) 731 return ERROR_INV_SPS_PPS_T; 732 ps_seq->u1_num_ref_frames_in_pic_order_cnt_cycle = u4_temp; 733 COPYTHECONTEXT("SPS: num_ref_frames_in_pic_order_cnt_cycle", 734 ps_seq->u1_num_ref_frames_in_pic_order_cnt_cycle); 735 736 for(i = 0; i < ps_seq->u1_num_ref_frames_in_pic_order_cnt_cycle; i++) 737 { 738 ps_seq->i4_ofst_for_ref_frame[i] = ih264d_sev( 739 pu4_bitstrm_ofst, pu4_bitstrm_buf); 740 COPYTHECONTEXT("SPS: offset_for_ref_frame", 741 ps_seq->i4_ofst_for_ref_frame[i]); 742 } 743 } 744 745 u4_temp = ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf); 746 747 if((u4_temp > H264_MAX_REF_PICS)) 748 { 749 return ERROR_NUM_REF; 750 } 751 752 /* Compare with older num_ref_frames is header is already once */ 753 if((ps_dec->i4_header_decoded & 1) && (ps_seq->u1_num_ref_frames != u4_temp)) 754 { 755 ps_dec->u1_res_changed = 1; 756 return IVD_RES_CHANGED; 757 } 758 759 ps_seq->u1_num_ref_frames = u4_temp; 760 COPYTHECONTEXT("SPS: num_ref_frames",ps_seq->u1_num_ref_frames); 761 762 ps_seq->u1_gaps_in_frame_num_value_allowed_flag = ih264d_get_bit_h264( 763 ps_bitstrm); 764 COPYTHECONTEXT("SPS: gaps_in_frame_num_value_allowed_flag", 765 ps_seq->u1_gaps_in_frame_num_value_allowed_flag); 766 767 /*--------------------------------------------------------------------*/ 768 /* Decode FrameWidth and FrameHeight and related values */ 769 /*--------------------------------------------------------------------*/ 770 ps_seq->u2_frm_wd_in_mbs = 1 771 + ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf); 772 COPYTHECONTEXT("SPS: pic_width_in_mbs_minus1", 773 ps_seq->u2_frm_wd_in_mbs - 1); 774 u2_pic_wd = (ps_seq->u2_frm_wd_in_mbs << 4); 775 776 pic_height_in_map_units_minus1 = ih264d_uev(pu4_bitstrm_ofst, 777 pu4_bitstrm_buf); 778 ps_seq->u2_frm_ht_in_mbs = 1 + pic_height_in_map_units_minus1; 779 780 u2_pic_ht = (ps_seq->u2_frm_ht_in_mbs << 4); 781 782 /*--------------------------------------------------------------------*/ 783 /* Get the value of MaxMbAddress and Number of bits needed for it */ 784 /*--------------------------------------------------------------------*/ 785 ps_seq->u2_max_mb_addr = (ps_seq->u2_frm_wd_in_mbs 786 * ps_seq->u2_frm_ht_in_mbs) - 1; 787 788 ps_seq->u2_total_num_of_mbs = ps_seq->u2_max_mb_addr + 1; 789 790 ps_seq->u1_level_idc = ih264d_correct_level_idc( 791 u1_level_idc, ps_seq->u2_total_num_of_mbs); 792 793 u1_frm = ih264d_get_bit_h264(ps_bitstrm); 794 ps_seq->u1_frame_mbs_only_flag = u1_frm; 795 796 COPYTHECONTEXT("SPS: frame_mbs_only_flag", u1_frm); 797 798 if(!u1_frm) 799 { 800 u2_pic_ht <<= 1; 801 ps_seq->u1_mb_aff_flag = ih264d_get_bit_h264(ps_bitstrm); 802 COPYTHECONTEXT("SPS: mb_adaptive_frame_field_flag", 803 ps_seq->u1_mb_aff_flag); 804 805 } 806 else 807 ps_seq->u1_mb_aff_flag = 0; 808 809 ps_seq->u1_direct_8x8_inference_flag = ih264d_get_bit_h264(ps_bitstrm); 810 811 COPYTHECONTEXT("SPS: direct_8x8_inference_flag", 812 ps_seq->u1_direct_8x8_inference_flag); 813 814 /* G050 */ 815 u1_frame_cropping_flag = ih264d_get_bit_h264(ps_bitstrm); 816 COPYTHECONTEXT("SPS: frame_cropping_flag",u1_frame_cropping_flag); 817 818 if(u1_frame_cropping_flag) 819 { 820 u1_frame_cropping_rect_left_ofst = ih264d_uev(pu4_bitstrm_ofst, 821 pu4_bitstrm_buf); 822 COPYTHECONTEXT("SPS: frame_cropping_rect_left_offset", 823 u1_frame_cropping_rect_left_ofst); 824 u1_frame_cropping_rect_right_ofst = ih264d_uev(pu4_bitstrm_ofst, 825 pu4_bitstrm_buf); 826 COPYTHECONTEXT("SPS: frame_cropping_rect_right_offset", 827 u1_frame_cropping_rect_right_ofst); 828 u1_frame_cropping_rect_top_ofst = ih264d_uev(pu4_bitstrm_ofst, 829 pu4_bitstrm_buf); 830 COPYTHECONTEXT("SPS: frame_cropping_rect_top_offset", 831 u1_frame_cropping_rect_top_ofst); 832 u1_frame_cropping_rect_bottom_ofst = ih264d_uev(pu4_bitstrm_ofst, 833 pu4_bitstrm_buf); 834 COPYTHECONTEXT("SPS: frame_cropping_rect_bottom_offset", 835 u1_frame_cropping_rect_bottom_ofst); 836 } 837 /* G050 */ 838 839 ps_seq->u1_vui_parameters_present_flag = ih264d_get_bit_h264(ps_bitstrm); 840 COPYTHECONTEXT("SPS: vui_parameters_present_flag", 841 ps_seq->u1_vui_parameters_present_flag); 842 843 u2_frm_wd_y = u2_pic_wd + (UWORD8)(PAD_LEN_Y_H << 1); 844 if(1 == ps_dec->u4_share_disp_buf) 845 { 846 if(ps_dec->u4_app_disp_width > u2_frm_wd_y) 847 u2_frm_wd_y = ps_dec->u4_app_disp_width; 848 } 849 850 u2_frm_ht_y = u2_pic_ht + (UWORD8)(PAD_LEN_Y_V << 2); 851 u2_frm_wd_uv = u2_pic_wd + (UWORD8)(PAD_LEN_UV_H << 2); 852 u2_frm_wd_uv = MAX(u2_frm_wd_uv, u2_frm_wd_y); 853 854 u2_frm_ht_uv = (u2_pic_ht >> 1) + (UWORD8)(PAD_LEN_UV_V << 2); 855 u2_frm_ht_uv = MAX(u2_frm_ht_uv, (u2_frm_ht_y >> 1)); 856 857 858 /* Calculate display picture width, height and start u4_ofst from YUV420 */ 859 /* pictute buffers as per cropping information parsed above */ 860 { 861 UWORD16 u2_rgt_ofst = 0; 862 UWORD16 u2_lft_ofst = 0; 863 UWORD16 u2_top_ofst = 0; 864 UWORD16 u2_btm_ofst = 0; 865 UWORD8 u1_frm_mbs_flag; 866 UWORD8 u1_vert_mult_factor; 867 868 if(u1_frame_cropping_flag) 869 { 870 /* Calculate right and left u4_ofst for cropped picture */ 871 u2_rgt_ofst = u1_frame_cropping_rect_right_ofst << 1; 872 u2_lft_ofst = u1_frame_cropping_rect_left_ofst << 1; 873 874 /* Know frame MBs only u4_flag */ 875 u1_frm_mbs_flag = (1 == ps_seq->u1_frame_mbs_only_flag); 876 877 /* Simplify the vertical u4_ofst calculation from field/frame */ 878 u1_vert_mult_factor = (2 - u1_frm_mbs_flag); 879 880 /* Calculate bottom and top u4_ofst for cropped picture */ 881 u2_btm_ofst = (u1_frame_cropping_rect_bottom_ofst 882 << u1_vert_mult_factor); 883 u2_top_ofst = (u1_frame_cropping_rect_top_ofst 884 << u1_vert_mult_factor); 885 } 886 887 /* Calculate u4_ofst from start of YUV 420 picture buffer to start of*/ 888 /* cropped picture buffer */ 889 u2_crop_offset_y = (u2_frm_wd_y * u2_top_ofst) + (u2_lft_ofst); 890 u2_crop_offset_uv = (u2_frm_wd_uv * (u2_top_ofst >> 1)) 891 + (u2_lft_ofst >> 1) * YUV420SP_FACTOR; 892 /* Calculate the display picture width and height based on crop */ 893 /* information */ 894 i4_cropped_ht = u2_pic_ht - (u2_btm_ofst + u2_top_ofst); 895 i4_cropped_wd = u2_pic_wd - (u2_rgt_ofst + u2_lft_ofst); 896 897 if((i4_cropped_ht < MB_SIZE) || (i4_cropped_wd < MB_SIZE)) 898 { 899 return ERROR_INV_SPS_PPS_T; 900 } 901 902 if((ps_dec->i4_header_decoded & 1) && (ps_dec->u2_pic_wd != u2_pic_wd)) 903 { 904 ps_dec->u1_res_changed = 1; 905 return IVD_RES_CHANGED; 906 } 907 if((ps_dec->i4_header_decoded & 1) && (ps_dec->u2_pic_ht != u2_pic_ht)) 908 { 909 ps_dec->u1_res_changed = 1; 910 return IVD_RES_CHANGED; 911 } 912 913 /* Check for unsupported resolutions */ 914 if((u2_pic_wd > H264_MAX_FRAME_WIDTH) || (u2_pic_ht > H264_MAX_FRAME_HEIGHT)) 915 { 916 return IVD_STREAM_WIDTH_HEIGHT_NOT_SUPPORTED; 917 } 918 919 /* If MBAff is enabled, decoder support is limited to streams with 920 * width less than half of H264_MAX_FRAME_WIDTH. 921 * In case of MBAff decoder processes two rows at a time 922 */ 923 if((u2_pic_wd << ps_seq->u1_mb_aff_flag) > H264_MAX_FRAME_WIDTH) 924 { 925 return IVD_STREAM_WIDTH_HEIGHT_NOT_SUPPORTED; 926 } 927 928 } 929 930 /* Backup u4_num_reorder_frames if header is already decoded */ 931 if((ps_dec->i4_header_decoded & 1) && 932 (1 == ps_seq->u1_vui_parameters_present_flag) && 933 (1 == ps_seq->s_vui.u1_bitstream_restriction_flag)) 934 { 935 u4_num_reorder_frames = ps_seq->s_vui.u4_num_reorder_frames; 936 } 937 else 938 { 939 u4_num_reorder_frames = -1; 940 } 941 if(1 == ps_seq->u1_vui_parameters_present_flag) 942 { 943 ret = ih264d_parse_vui_parametres(&ps_seq->s_vui, ps_bitstrm); 944 if(ret != OK) 945 return ret; 946 } 947 948 /* Compare older u4_num_reorder_frames with the new one if header is already decoded */ 949 if((ps_dec->i4_header_decoded & 1) && 950 (-1 != (WORD32)u4_num_reorder_frames) && 951 (1 == ps_seq->u1_vui_parameters_present_flag) && 952 (1 == ps_seq->s_vui.u1_bitstream_restriction_flag) && 953 (ps_seq->s_vui.u4_num_reorder_frames != u4_num_reorder_frames)) 954 { 955 ps_dec->u1_res_changed = 1; 956 return IVD_RES_CHANGED; 957 } 958 959 /* In case bitstream read has exceeded the filled size, then 960 return an error */ 961 if (ps_bitstrm->u4_ofst > ps_bitstrm->u4_max_ofst) 962 { 963 return ERROR_INV_SPS_PPS_T; 964 } 965 966 /*--------------------------------------------------------------------*/ 967 /* All initializations to ps_dec are beyond this point */ 968 /*--------------------------------------------------------------------*/ 969 ps_dec->u2_disp_height = i4_cropped_ht; 970 ps_dec->u2_disp_width = i4_cropped_wd; 971 972 ps_dec->u2_pic_wd = u2_pic_wd; 973 ps_dec->u2_pic_ht = u2_pic_ht; 974 975 /* Determining the Width and Height of Frame from that of Picture */ 976 ps_dec->u2_frm_wd_y = u2_frm_wd_y; 977 ps_dec->u2_frm_ht_y = u2_frm_ht_y; 978 979 ps_dec->u2_frm_wd_uv = u2_frm_wd_uv; 980 ps_dec->u2_frm_ht_uv = u2_frm_ht_uv; 981 ps_dec->s_pad_mgr.u1_pad_len_y_v = (UWORD8)(PAD_LEN_Y_V << (1 - u1_frm)); 982 ps_dec->s_pad_mgr.u1_pad_len_cr_v = (UWORD8)(PAD_LEN_UV_V << (1 - u1_frm)); 983 984 ps_dec->u2_frm_wd_in_mbs = ps_seq->u2_frm_wd_in_mbs; 985 ps_dec->u2_frm_ht_in_mbs = ps_seq->u2_frm_ht_in_mbs; 986 987 ps_dec->u2_crop_offset_y = u2_crop_offset_y; 988 ps_dec->u2_crop_offset_uv = u2_crop_offset_uv; 989 990 ps_seq->u1_is_valid = TRUE; 991 ps_dec->ps_sps[u1_seq_parameter_set_id] = *ps_seq; 992 ps_dec->ps_cur_sps = &ps_dec->ps_sps[u1_seq_parameter_set_id]; 993 994 return OK; 995 } 996 997 /*! 998 ************************************************************************** 999 * \if Function name : ih264d_parse_end_of_sequence \endif 1000 * 1001 * \brief 1002 * Decodes End of Sequence. 1003 * 1004 * \param ps_bitstrm : Pointer to bit ps_bitstrm containing the NAL unit 1005 * 1006 * \return 1007 * 0 on Success and error code otherwise 1008 ************************************************************************** 1009 */ 1010 WORD32 ih264d_parse_end_of_sequence(dec_struct_t * ps_dec) 1011 { 1012 WORD32 ret; 1013 1014 ret = ih264d_end_of_pic_processing(ps_dec); 1015 return ret; 1016 } 1017 1018 /*! 1019 ************************************************************************** 1020 * \if Function name : AcessUnitDelimiterRbsp \endif 1021 * 1022 * \brief 1023 * Decodes AcessUnitDelimiterRbsp. 1024 * 1025 * \param ps_bitstrm : Pointer to bit ps_bitstrm containing the NAL unit 1026 * 1027 * \return 1028 * 0 on Success and error code otherwise 1029 ************************************************************************** 1030 */ 1031 1032 WORD32 ih264d_access_unit_delimiter_rbsp(dec_struct_t * ps_dec) 1033 { 1034 UWORD8 u1_primary_pic_type; 1035 u1_primary_pic_type = ih264d_get_bits_h264(ps_dec->ps_bitstrm, 3); 1036 switch(u1_primary_pic_type) 1037 { 1038 case I_PIC: 1039 case SI_PIC: 1040 case ISI_PIC: 1041 ps_dec->ps_dec_err_status->u1_pic_aud_i = PIC_TYPE_I; 1042 break; 1043 default: 1044 ps_dec->ps_dec_err_status->u1_pic_aud_i = PIC_TYPE_UNKNOWN; 1045 } 1046 return (0); 1047 } 1048 /*! 1049 ************************************************************************** 1050 * \if Function name : ih264d_parse_nal_unit \endif 1051 * 1052 * \brief 1053 * Decodes NAL unit 1054 * 1055 * \return 1056 * 0 on Success and error code otherwise 1057 ************************************************************************** 1058 */ 1059 1060 WORD32 ih264d_parse_nal_unit(iv_obj_t *dec_hdl, 1061 ivd_video_decode_op_t *ps_dec_op, 1062 UWORD8 *pu1_buf, 1063 UWORD32 u4_length) 1064 { 1065 1066 dec_bit_stream_t *ps_bitstrm; 1067 1068 1069 dec_struct_t *ps_dec = (dec_struct_t *)dec_hdl->pv_codec_handle; 1070 ivd_video_decode_ip_t *ps_dec_in = 1071 (ivd_video_decode_ip_t *)ps_dec->pv_dec_in; 1072 dec_slice_params_t * ps_cur_slice = ps_dec->ps_cur_slice; 1073 UWORD8 u1_first_byte, u1_nal_ref_idc; 1074 UWORD8 u1_nal_unit_type; 1075 WORD32 i_status = OK; 1076 ps_bitstrm = ps_dec->ps_bitstrm; 1077 1078 if(pu1_buf) 1079 { 1080 if(u4_length) 1081 { 1082 ps_dec_op->u4_frame_decoded_flag = 0; 1083 ih264d_process_nal_unit(ps_dec->ps_bitstrm, pu1_buf, 1084 u4_length); 1085 1086 SWITCHOFFTRACE; 1087 u1_first_byte = ih264d_get_bits_h264(ps_bitstrm, 8); 1088 1089 if(NAL_FORBIDDEN_BIT(u1_first_byte)) 1090 { 1091 H264_DEC_DEBUG_PRINT("\nForbidden bit set in Nal Unit, Let's try\n"); 1092 } 1093 u1_nal_unit_type = NAL_UNIT_TYPE(u1_first_byte); 1094 // if any other nal unit other than slice nal is encountered in between a 1095 // frame break out of loop without consuming header 1096 if ((ps_dec->u4_slice_start_code_found == 1) 1097 && (ps_dec->u1_pic_decode_done != 1) 1098 && (u1_nal_unit_type > IDR_SLICE_NAL)) 1099 { 1100 return ERROR_INCOMPLETE_FRAME; 1101 } 1102 ps_dec->u1_nal_unit_type = u1_nal_unit_type; 1103 u1_nal_ref_idc = (UWORD8)(NAL_REF_IDC(u1_first_byte)); 1104 //Skip all NALUs if SPS and PPS are not decoded 1105 switch(u1_nal_unit_type) 1106 { 1107 case SLICE_DATA_PARTITION_A_NAL: 1108 case SLICE_DATA_PARTITION_B_NAL: 1109 case SLICE_DATA_PARTITION_C_NAL: 1110 if(!ps_dec->i4_decode_header) 1111 ih264d_parse_slice_partition(ps_dec, ps_bitstrm); 1112 1113 break; 1114 1115 case IDR_SLICE_NAL: 1116 case SLICE_NAL: 1117 1118 /* ! */ 1119 DEBUG_THREADS_PRINTF("Decoding a slice NAL\n"); 1120 if(!ps_dec->i4_decode_header) 1121 { 1122 if(ps_dec->i4_header_decoded == 3) 1123 { 1124 /* ! */ 1125 ps_dec->u4_slice_start_code_found = 1; 1126 1127 ih264d_rbsp_to_sodb(ps_dec->ps_bitstrm); 1128 1129 i_status = ih264d_parse_decode_slice( 1130 (UWORD8)(u1_nal_unit_type 1131 == IDR_SLICE_NAL), 1132 u1_nal_ref_idc, ps_dec); 1133 1134 if(i_status != OK) 1135 { 1136 return i_status; 1137 } 1138 } 1139 else 1140 { 1141 H264_DEC_DEBUG_PRINT( 1142 "\nSlice NAL Supplied but no header has been supplied\n"); 1143 } 1144 } 1145 break; 1146 1147 case SEI_NAL: 1148 if(!ps_dec->i4_decode_header) 1149 { 1150 ih264d_rbsp_to_sodb(ps_dec->ps_bitstrm); 1151 i_status = ih264d_parse_sei_message(ps_dec, ps_bitstrm); 1152 if(i_status != OK) 1153 return i_status; 1154 ih264d_parse_sei(ps_dec, ps_bitstrm); 1155 } 1156 break; 1157 case SEQ_PARAM_NAL: 1158 /* ! */ 1159 ih264d_rbsp_to_sodb(ps_dec->ps_bitstrm); 1160 i_status = ih264d_parse_sps(ps_dec, ps_bitstrm); 1161 ps_dec->u4_sps_cnt_in_process++; 1162 /*If a resolution change happens within a process call, due to multiple sps 1163 * we will not support it. 1164 */ 1165 if((ps_dec->u4_sps_cnt_in_process > 1 ) && 1166 (i_status == IVD_RES_CHANGED)) 1167 { 1168 i_status = ERROR_INV_SPS_PPS_T; 1169 ps_dec->u1_res_changed = 0; 1170 } 1171 if(i_status == ERROR_INV_SPS_PPS_T) 1172 return i_status; 1173 if(!i_status) 1174 ps_dec->i4_header_decoded |= 0x1; 1175 break; 1176 1177 case PIC_PARAM_NAL: 1178 /* ! */ 1179 ih264d_rbsp_to_sodb(ps_dec->ps_bitstrm); 1180 i_status = ih264d_parse_pps(ps_dec, ps_bitstrm); 1181 if(i_status == ERROR_INV_SPS_PPS_T) 1182 return i_status; 1183 if(!i_status) 1184 ps_dec->i4_header_decoded |= 0x2; 1185 break; 1186 case ACCESS_UNIT_DELIMITER_RBSP: 1187 if(!ps_dec->i4_decode_header) 1188 { 1189 ih264d_access_unit_delimiter_rbsp(ps_dec); 1190 } 1191 break; 1192 //Let us ignore the END_OF_SEQ_RBSP NAL and decode even after this NAL 1193 case END_OF_STREAM_RBSP: 1194 if(!ps_dec->i4_decode_header) 1195 { 1196 ih264d_parse_end_of_stream(ps_dec); 1197 } 1198 break; 1199 case FILLER_DATA_NAL: 1200 if(!ps_dec->i4_decode_header) 1201 { 1202 ih264d_parse_filler_data(ps_dec, ps_bitstrm); 1203 } 1204 break; 1205 default: 1206 H264_DEC_DEBUG_PRINT("\nUnknown NAL type %d\n", u1_nal_unit_type); 1207 break; 1208 } 1209 1210 } 1211 1212 } 1213 1214 return i_status; 1215 1216 } 1217 1218
