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#include <stdio.h> 21#include <string.h> 22 23#include "iv_datatypedef.h" 24#include "iv.h" 25 26#include "impeg2_buf_mgr.h" 27#include "impeg2_disp_mgr.h" 28#include "impeg2_defs.h" 29#include "impeg2_platform_macros.h" 30#include "impeg2_inter_pred.h" 31#include "impeg2_idct.h" 32#include "impeg2_globals.h" 33#include "impeg2_mem_func.h" 34#include "impeg2_format_conv.h" 35#include "impeg2_macros.h" 36 37#include "ivd.h" 38#include "impeg2d.h" 39#include "impeg2d_bitstream.h" 40#include "impeg2d_structs.h" 41#include "impeg2d_vld_tables.h" 42#include "impeg2d_vld.h" 43#include "impeg2d_pic_proc.h" 44#include "impeg2d_debug.h" 45#include "impeg2d_mc.h" 46 47#define BLK_SIZE 8 48#define LUMA_BLK_SIZE (2 * (BLK_SIZE)) 49#define CHROMA_BLK_SIZE (BLK_SIZE) 50 51 52/******************************************************************************* 53* 54* Function Name : impeg2d_dec_p_mb_params 55* 56* Description : Decodes the parameters for P 57* 58* Arguments : 59* dec : Decoder context 60* 61* Values Returned : None 62*******************************************************************************/ 63void impeg2d_dec_p_mb_params(dec_state_t *ps_dec) 64{ 65 stream_t *ps_stream = &ps_dec->s_bit_stream; 66 UWORD16 u2_mb_addr_incr; 67 UWORD16 u2_total_len; 68 UWORD16 u2_len; 69 UWORD16 u2_mb_type; 70 UWORD32 u4_next_word; 71 const dec_mb_params_t *ps_dec_mb_params; 72 if(impeg2d_bit_stream_nxt(ps_stream,1) == 1) 73 { 74 impeg2d_bit_stream_flush(ps_stream,1); 75 76 } 77 else 78 { 79 u2_mb_addr_incr = impeg2d_get_mb_addr_incr(ps_stream); 80 if(0 == ps_dec->u2_first_mb) 81 { 82 /****************************************************************/ 83 /* If the 2nd member of a field picture pair is a P picture and */ 84 /* the first one was an I picture, there cannot be any skipped */ 85 /* MBs in the second field picture */ 86 /****************************************************************/ 87 /* 88 if((dec->picture_structure != FRAME_PICTURE) && 89 (dec->f->FieldFuncCall != 0) && 90 (dec->las->u1_last_coded_vop_type == I)) 91 { 92 core0_err_handler((void *)(VOLParams), 93 ITTMPEG2_ERR_INVALID_MB_SKIP); 94 } 95 */ 96 /****************************************************************/ 97 /* In MPEG-2, the last MB of the row cannot be skipped and the */ 98 /* MBAddrIncr cannot be such that it will take the current MB */ 99 /* beyond the current row */ 100 /* In MPEG-1, the slice could start and end anywhere and is not */ 101 /* restricted to a row like in MPEG-2. Hence this check should */ 102 /* not be done for MPEG-1 streams. */ 103 /****************************************************************/ 104 if(ps_dec->u2_is_mpeg2 && ((ps_dec->u2_mb_x + u2_mb_addr_incr) > ps_dec->u2_num_horiz_mb) ) 105 { 106 u2_mb_addr_incr = ps_dec->u2_num_horiz_mb - ps_dec->u2_mb_x; 107 } 108 109 impeg2d_dec_skip_mbs(ps_dec, (UWORD16)(u2_mb_addr_incr - 1)); 110 } 111 112 } 113 u4_next_word = (UWORD16)impeg2d_bit_stream_nxt(ps_stream,16); 114 /*-----------------------------------------------------------------------*/ 115 /* MB type */ 116 /*-----------------------------------------------------------------------*/ 117 { 118 u2_mb_type = ps_dec->pu2_mb_type[BITS((UWORD16)u4_next_word,15,10)]; 119 u2_len = BITS(u2_mb_type,15,8); 120 u2_total_len = u2_len; 121 u4_next_word = (UWORD16)LSW((UWORD16)u4_next_word << u2_len); 122 } 123 /*-----------------------------------------------------------------------*/ 124 /* motion type */ 125 /*-----------------------------------------------------------------------*/ 126 { 127 if((u2_mb_type & MB_FORW_OR_BACK) && ps_dec->u2_read_motion_type) 128 { 129 WORD32 i4_motion_type; 130 ps_dec->u2_motion_type = BITS((UWORD16)u4_next_word,15,14); 131 u2_total_len += MB_MOTION_TYPE_LEN; 132 u4_next_word = (UWORD16)LSW((UWORD16)u4_next_word << MB_MOTION_TYPE_LEN); 133 i4_motion_type = ps_dec->u2_motion_type; 134 135 if((i4_motion_type == 0) || 136 (i4_motion_type == 4) || 137 (i4_motion_type > 7)) 138 { 139 //TODO : VANG Check for validity 140 i4_motion_type = 1; 141 } 142 143 } 144 } 145 /*-----------------------------------------------------------------------*/ 146 /* dct type */ 147 /*-----------------------------------------------------------------------*/ 148 { 149 if((u2_mb_type & MB_CODED) && ps_dec->u2_read_dct_type) 150 { 151 ps_dec->u2_field_dct = BIT((UWORD16)u4_next_word,15); 152 u2_total_len += MB_DCT_TYPE_LEN; 153 u4_next_word = (UWORD16)LSW((UWORD16)u4_next_word << MB_DCT_TYPE_LEN); 154 } 155 } 156 /*-----------------------------------------------------------------------*/ 157 /* Quant scale code */ 158 /*-----------------------------------------------------------------------*/ 159 if(u2_mb_type & MB_QUANT) 160 { 161 UWORD16 u2_quant_scale_code; 162 u2_quant_scale_code = BITS((UWORD16)u4_next_word,15,11); 163 164 ps_dec->u1_quant_scale = (ps_dec->u2_q_scale_type) ? 165 gau1_impeg2_non_linear_quant_scale[u2_quant_scale_code] : (u2_quant_scale_code << 1); 166 u2_total_len += MB_QUANT_SCALE_CODE_LEN; 167 } 168 impeg2d_bit_stream_flush(ps_stream,u2_total_len); 169 /*-----------------------------------------------------------------------*/ 170 /* Set the function pointers */ 171 /*-----------------------------------------------------------------------*/ 172 ps_dec->u2_coded_mb = (UWORD16)(u2_mb_type & MB_CODED); 173 174 if(u2_mb_type & MB_FORW_OR_BACK) 175 { 176 177 UWORD16 refPic = !(u2_mb_type & MB_MV_FORW); 178 UWORD16 index = (ps_dec->u2_motion_type); 179 ps_dec->u2_prev_intra_mb = 0; 180 ps_dec->e_mb_pred = (e_pred_direction_t)refPic; 181 ps_dec_mb_params = &ps_dec->ps_func_forw_or_back[index]; 182 ps_dec->s_mb_type = ps_dec_mb_params->s_mb_type; 183 ps_dec_mb_params->pf_func_mb_params(ps_dec); 184 185 } 186 else if(u2_mb_type & MB_TYPE_INTRA) 187 { 188 ps_dec->u2_prev_intra_mb = 1; 189 impeg2d_dec_intra_mb(ps_dec); 190 191 } 192 else 193 { 194 ps_dec->u2_prev_intra_mb = 0; 195 ps_dec->e_mb_pred = FORW; 196 ps_dec->u2_motion_type = 0; 197 impeg2d_dec_0mv_coded_mb(ps_dec); 198 } 199 200 /*-----------------------------------------------------------------------*/ 201 /* decode cbp */ 202 /*-----------------------------------------------------------------------*/ 203 if((u2_mb_type & MB_TYPE_INTRA)) 204 { 205 ps_dec->u2_cbp = 0x3f; 206 ps_dec->u2_prev_intra_mb = 1; 207 } 208 else 209 { 210 ps_dec->u2_prev_intra_mb = 0; 211 ps_dec->u2_def_dc_pred[Y_LUMA] = 128 << ps_dec->u2_intra_dc_precision; 212 ps_dec->u2_def_dc_pred[U_CHROMA] = 128 << ps_dec->u2_intra_dc_precision; 213 ps_dec->u2_def_dc_pred[V_CHROMA] = 128 << ps_dec->u2_intra_dc_precision; 214 if((ps_dec->u2_coded_mb)) 215 { 216 UWORD16 cbpValue; 217 cbpValue = gau2_impeg2d_cbp_code[impeg2d_bit_stream_nxt(ps_stream,MB_CBP_LEN)]; 218 ps_dec->u2_cbp = cbpValue & 0xFF; 219 impeg2d_bit_stream_flush(ps_stream,(cbpValue >> 8) & 0x0FF); 220 } 221 else 222 { 223 ps_dec->u2_cbp = 0; 224 } 225 } 226} 227 228 229/******************************************************************************* 230* 231* Function Name : impeg2d_dec_pnb_mb_params 232* 233* Description : Decodes the parameters for P and B pictures 234* 235* Arguments : 236* dec : Decoder context 237* 238* Values Returned : None 239*******************************************************************************/ 240void impeg2d_dec_pnb_mb_params(dec_state_t *ps_dec) 241{ 242 stream_t *ps_stream = &ps_dec->s_bit_stream; 243 UWORD16 u2_mb_addr_incr; 244 UWORD16 u2_total_len; 245 UWORD16 u2_len; 246 UWORD16 u2_mb_type; 247 UWORD32 u4_next_word; 248 const dec_mb_params_t *ps_dec_mb_params; 249 if(impeg2d_bit_stream_nxt(ps_stream,1) == 1) 250 { 251 impeg2d_bit_stream_flush(ps_stream,1); 252 253 } 254 else 255 { 256 u2_mb_addr_incr = impeg2d_get_mb_addr_incr(ps_stream); 257 258 if(ps_dec->u2_first_mb) 259 { 260 /****************************************************************/ 261 /* Section 6.3.17 */ 262 /* The first MB of a slice cannot be skipped */ 263 /* But the mb_addr_incr can be > 1, because at the beginning of */ 264 /* a slice, it indicates the offset from the last MB in the */ 265 /* previous row. Hence for the first slice in a row, the */ 266 /* mb_addr_incr needs to be 1. */ 267 /****************************************************************/ 268 /* MB_x is set to zero whenever MB_y changes. */ 269 ps_dec->u2_mb_x = u2_mb_addr_incr - 1; 270 /* For error resilience */ 271 ps_dec->u2_mb_x = MIN(ps_dec->u2_mb_x, (ps_dec->u2_num_horiz_mb - 1)); 272 273 /****************************************************************/ 274 /* mb_addr_incr is forced to 1 because in this decoder it is used */ 275 /* more as an indicator of the number of MBs skipped than the */ 276 /* as defined by the standard (Section 6.3.17) */ 277 /****************************************************************/ 278 u2_mb_addr_incr = 1; 279 ps_dec->u2_first_mb = 0; 280 } 281 else 282 { 283 /****************************************************************/ 284 /* In MPEG-2, the last MB of the row cannot be skipped and the */ 285 /* mb_addr_incr cannot be such that it will take the current MB */ 286 /* beyond the current row */ 287 /* In MPEG-1, the slice could start and end anywhere and is not */ 288 /* restricted to a row like in MPEG-2. Hence this check should */ 289 /* not be done for MPEG-1 streams. */ 290 /****************************************************************/ 291 if(ps_dec->u2_is_mpeg2 && 292 ((ps_dec->u2_mb_x + u2_mb_addr_incr) > ps_dec->u2_num_horiz_mb)) 293 { 294 u2_mb_addr_incr = ps_dec->u2_num_horiz_mb - ps_dec->u2_mb_x; 295 } 296 297 298 impeg2d_dec_skip_mbs(ps_dec, (UWORD16)(u2_mb_addr_incr - 1)); 299 } 300 301 } 302 u4_next_word = (UWORD16)impeg2d_bit_stream_nxt(ps_stream,16); 303 /*-----------------------------------------------------------------------*/ 304 /* MB type */ 305 /*-----------------------------------------------------------------------*/ 306 { 307 u2_mb_type = ps_dec->pu2_mb_type[BITS((UWORD16)u4_next_word,15,10)]; 308 u2_len = BITS(u2_mb_type,15,8); 309 u2_total_len = u2_len; 310 u4_next_word = (UWORD16)LSW((UWORD16)u4_next_word << u2_len); 311 } 312 /*-----------------------------------------------------------------------*/ 313 /* motion type */ 314 /*-----------------------------------------------------------------------*/ 315 { 316 WORD32 i4_motion_type = ps_dec->u2_motion_type; 317 318 if((u2_mb_type & MB_FORW_OR_BACK) && ps_dec->u2_read_motion_type) 319 { 320 ps_dec->u2_motion_type = BITS((UWORD16)u4_next_word,15,14); 321 u2_total_len += MB_MOTION_TYPE_LEN; 322 u4_next_word = (UWORD16)LSW((UWORD16)u4_next_word << MB_MOTION_TYPE_LEN); 323 i4_motion_type = ps_dec->u2_motion_type; 324 325 } 326 327 328 if ((u2_mb_type & MB_FORW_OR_BACK) && 329 ((i4_motion_type == 0) || 330 (i4_motion_type == 3) || 331 (i4_motion_type == 4) || 332 (i4_motion_type >= 7))) 333 { 334 //TODO: VANG Check for validity 335 i4_motion_type = 1; 336 } 337 338 } 339 /*-----------------------------------------------------------------------*/ 340 /* dct type */ 341 /*-----------------------------------------------------------------------*/ 342 { 343 if((u2_mb_type & MB_CODED) && ps_dec->u2_read_dct_type) 344 { 345 ps_dec->u2_field_dct = BIT((UWORD16)u4_next_word,15); 346 u2_total_len += MB_DCT_TYPE_LEN; 347 u4_next_word = (UWORD16)LSW((UWORD16)u4_next_word << MB_DCT_TYPE_LEN); 348 } 349 } 350 /*-----------------------------------------------------------------------*/ 351 /* Quant scale code */ 352 /*-----------------------------------------------------------------------*/ 353 if(u2_mb_type & MB_QUANT) 354 { 355 UWORD16 u2_quant_scale_code; 356 u2_quant_scale_code = BITS((UWORD16)u4_next_word,15,11); 357 358 ps_dec->u1_quant_scale = (ps_dec->u2_q_scale_type) ? 359 gau1_impeg2_non_linear_quant_scale[u2_quant_scale_code] : (u2_quant_scale_code << 1); 360 u2_total_len += MB_QUANT_SCALE_CODE_LEN; 361 } 362 impeg2d_bit_stream_flush(ps_stream,u2_total_len); 363 /*-----------------------------------------------------------------------*/ 364 /* Set the function pointers */ 365 /*-----------------------------------------------------------------------*/ 366 ps_dec->u2_coded_mb = (UWORD16)(u2_mb_type & MB_CODED); 367 368 if(u2_mb_type & MB_BIDRECT) 369 { 370 UWORD16 u2_index = (ps_dec->u2_motion_type); 371 372 ps_dec->u2_prev_intra_mb = 0; 373 ps_dec->e_mb_pred = BIDIRECT; 374 ps_dec_mb_params = &ps_dec->ps_func_bi_direct[u2_index]; 375 ps_dec->s_mb_type = ps_dec_mb_params->s_mb_type; 376 ps_dec_mb_params->pf_func_mb_params(ps_dec); 377 } 378 else if(u2_mb_type & MB_FORW_OR_BACK) 379 { 380 381 UWORD16 u2_refPic = !(u2_mb_type & MB_MV_FORW); 382 UWORD16 u2_index = (ps_dec->u2_motion_type); 383 ps_dec->u2_prev_intra_mb = 0; 384 ps_dec->e_mb_pred = (e_pred_direction_t)u2_refPic; 385 ps_dec_mb_params = &ps_dec->ps_func_forw_or_back[u2_index]; 386 ps_dec->s_mb_type = ps_dec_mb_params->s_mb_type; 387 ps_dec_mb_params->pf_func_mb_params(ps_dec); 388 389 } 390 else if(u2_mb_type & MB_TYPE_INTRA) 391 { 392 ps_dec->u2_prev_intra_mb = 1; 393 impeg2d_dec_intra_mb(ps_dec); 394 395 } 396 else 397 { 398 ps_dec->u2_prev_intra_mb =0; 399 ps_dec->e_mb_pred = FORW; 400 ps_dec->u2_motion_type = 0; 401 impeg2d_dec_0mv_coded_mb(ps_dec); 402 } 403 404 /*-----------------------------------------------------------------------*/ 405 /* decode cbp */ 406 /*-----------------------------------------------------------------------*/ 407 if((u2_mb_type & MB_TYPE_INTRA)) 408 { 409 ps_dec->u2_cbp = 0x3f; 410 ps_dec->u2_prev_intra_mb = 1; 411 } 412 else 413 { 414 ps_dec->u2_prev_intra_mb = 0; 415 ps_dec->u2_def_dc_pred[Y_LUMA] = 128 << ps_dec->u2_intra_dc_precision; 416 ps_dec->u2_def_dc_pred[U_CHROMA] = 128 << ps_dec->u2_intra_dc_precision; 417 ps_dec->u2_def_dc_pred[V_CHROMA] = 128 << ps_dec->u2_intra_dc_precision; 418 if((ps_dec->u2_coded_mb)) 419 { 420 UWORD16 cbpValue; 421 cbpValue = gau2_impeg2d_cbp_code[impeg2d_bit_stream_nxt(ps_stream,MB_CBP_LEN)]; 422 ps_dec->u2_cbp = cbpValue & 0xFF; 423 impeg2d_bit_stream_flush(ps_stream,(cbpValue >> 8) & 0x0FF); 424 } 425 else 426 { 427 ps_dec->u2_cbp = 0; 428 } 429 } 430} 431 432/******************************************************************************* 433* Function Name : impeg2d_dec_p_b_slice 434* 435* Description : Decodes P and B slices 436* 437* Arguments : 438* dec : Decoder state 439* 440* Values Returned : None 441*******************************************************************************/ 442IMPEG2D_ERROR_CODES_T impeg2d_dec_p_b_slice(dec_state_t *ps_dec) 443{ 444 WORD16 *pi2_vld_out; 445 UWORD32 i; 446 yuv_buf_t *ps_cur_frm_buf = &ps_dec->s_cur_frm_buf; 447 448 UWORD32 u4_frm_offset = 0; 449 const dec_mb_params_t *ps_dec_mb_params; 450 IMPEG2D_ERROR_CODES_T e_error = (IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE; 451 452 pi2_vld_out = ps_dec->ai2_vld_buf; 453 memset(ps_dec->ai2_pred_mv,0,sizeof(ps_dec->ai2_pred_mv)); 454 455 ps_dec->u2_prev_intra_mb = 0; 456 ps_dec->u2_first_mb = 1; 457 458 ps_dec->u2_picture_width = ps_dec->u2_frame_width; 459 460 if(ps_dec->u2_picture_structure != FRAME_PICTURE) 461 { 462 ps_dec->u2_picture_width <<= 1; 463 if(ps_dec->u2_picture_structure == BOTTOM_FIELD) 464 { 465 u4_frm_offset = ps_dec->u2_frame_width; 466 } 467 } 468 469 do 470 { 471 UWORD32 u4_x_offset, u4_y_offset; 472 473 474 475 UWORD32 u4_x_dst_offset = 0; 476 UWORD32 u4_y_dst_offset = 0; 477 UWORD8 *pu1_out_p; 478 UWORD8 *pu1_pred; 479 WORD32 u4_pred_strd; 480 481 IMPEG2D_TRACE_MB_START(ps_dec->u2_mb_x, ps_dec->u2_mb_y); 482 483 484 if(ps_dec->e_pic_type == B_PIC) 485 impeg2d_dec_pnb_mb_params(ps_dec); 486 else 487 impeg2d_dec_p_mb_params(ps_dec); 488 489 IMPEG2D_TRACE_MB_START(ps_dec->u2_mb_x, ps_dec->u2_mb_y); 490 491 u4_x_dst_offset = u4_frm_offset + (ps_dec->u2_mb_x << 4); 492 u4_y_dst_offset = (ps_dec->u2_mb_y << 4) * ps_dec->u2_picture_width; 493 pu1_out_p = ps_cur_frm_buf->pu1_y + u4_x_dst_offset + u4_y_dst_offset; 494 if(ps_dec->u2_prev_intra_mb == 0) 495 { 496 UWORD32 offset_x, offset_y, stride; 497 UWORD16 index = (ps_dec->u2_motion_type); 498 /*only for non intra mb's*/ 499 if(ps_dec->e_mb_pred == BIDIRECT) 500 { 501 ps_dec_mb_params = &ps_dec->ps_func_bi_direct[index]; 502 } 503 else 504 { 505 ps_dec_mb_params = &ps_dec->ps_func_forw_or_back[index]; 506 } 507 508 stride = ps_dec->u2_picture_width; 509 510 offset_x = u4_frm_offset + (ps_dec->u2_mb_x << 4); 511 512 offset_y = (ps_dec->u2_mb_y << 4); 513 514 ps_dec->s_dest_buf.pu1_y = ps_cur_frm_buf->pu1_y + offset_y * stride + offset_x; 515 516 stride = stride >> 1; 517 518 ps_dec->s_dest_buf.pu1_u = ps_cur_frm_buf->pu1_u + (offset_y >> 1) * stride 519 + (offset_x >> 1); 520 521 ps_dec->s_dest_buf.pu1_v = ps_cur_frm_buf->pu1_v + (offset_y >> 1) * stride 522 + (offset_x >> 1); 523 524 PROFILE_DISABLE_MC_IF0 525 ps_dec_mb_params->pf_mc(ps_dec); 526 527 } 528 for(i = 0; i < NUM_LUMA_BLKS; ++i) 529 { 530 if((ps_dec->u2_cbp & (1 << (BLOCKS_IN_MB - 1 - i))) != 0) 531 { 532 e_error = ps_dec->pf_vld_inv_quant(ps_dec, pi2_vld_out, ps_dec->pu1_inv_scan_matrix, 533 ps_dec->u2_prev_intra_mb, Y_LUMA, 0); 534 if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error) 535 { 536 return e_error; 537 } 538 539 u4_x_offset = gai2_impeg2_blk_x_off[i]; 540 541 if(ps_dec->u2_field_dct == 0) 542 u4_y_offset = gai2_impeg2_blk_y_off_frm[i] ; 543 else 544 u4_y_offset = gai2_impeg2_blk_y_off_fld[i] ; 545 546 547 548 549 550 IMPEG2D_IDCT_INP_STATISTICS(pi2_vld_out, ps_dec->u4_non_zero_cols, ps_dec->u4_non_zero_rows); 551 552 PROFILE_DISABLE_IDCT_IF0 553 { 554 WORD32 idx; 555 if(1 == (ps_dec->u4_non_zero_cols | ps_dec->u4_non_zero_rows)) 556 idx = 0; 557 else 558 idx = 1; 559 560 if(0 == ps_dec->u2_prev_intra_mb) 561 { 562 pu1_pred = pu1_out_p + u4_y_offset * ps_dec->u2_picture_width + u4_x_offset; 563 u4_pred_strd = ps_dec->u2_picture_width << ps_dec->u2_field_dct; 564 } 565 else 566 { 567 pu1_pred = (UWORD8 *)gau1_impeg2_zerobuf; 568 u4_pred_strd = 8; 569 } 570 571 ps_dec->pf_idct_recon[idx * 2 + ps_dec->i4_last_value_one](pi2_vld_out, 572 ps_dec->ai2_idct_stg1, 573 pu1_pred, 574 pu1_out_p + u4_y_offset * ps_dec->u2_picture_width + u4_x_offset, 575 8, 576 u4_pred_strd, 577 ps_dec->u2_picture_width << ps_dec->u2_field_dct, 578 ~ps_dec->u4_non_zero_cols, ~ps_dec->u4_non_zero_rows); 579 } 580 } 581 582 } 583 584 /* For U and V blocks, divide the x and y offsets by 2. */ 585 u4_x_dst_offset >>= 1; 586 u4_y_dst_offset >>= 2; 587 588 589 /* In case of chrominance blocks the DCT will be frame DCT */ 590 /* i = 0, U component and i = 1 is V componet */ 591 if((ps_dec->u2_cbp & 0x02) != 0) 592 { 593 pu1_out_p = ps_cur_frm_buf->pu1_u + u4_x_dst_offset + u4_y_dst_offset; 594 e_error = ps_dec->pf_vld_inv_quant(ps_dec, pi2_vld_out, ps_dec->pu1_inv_scan_matrix, 595 ps_dec->u2_prev_intra_mb, U_CHROMA, 0); 596 if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error) 597 { 598 return e_error; 599 } 600 601 602 IMPEG2D_IDCT_INP_STATISTICS(pi2_vld_out, ps_dec->u4_non_zero_cols, ps_dec->u4_non_zero_rows); 603 604 PROFILE_DISABLE_IDCT_IF0 605 { 606 WORD32 idx; 607 if(1 == (ps_dec->u4_non_zero_cols | ps_dec->u4_non_zero_rows)) 608 idx = 0; 609 else 610 idx = 1; 611 612 if(0 == ps_dec->u2_prev_intra_mb) 613 { 614 pu1_pred = pu1_out_p; 615 u4_pred_strd = ps_dec->u2_picture_width >> 1; 616 } 617 else 618 { 619 pu1_pred = (UWORD8 *)gau1_impeg2_zerobuf; 620 u4_pred_strd = 8; 621 } 622 623 ps_dec->pf_idct_recon[idx * 2 + ps_dec->i4_last_value_one](pi2_vld_out, 624 ps_dec->ai2_idct_stg1, 625 pu1_pred, 626 pu1_out_p, 627 8, 628 u4_pred_strd, 629 ps_dec->u2_picture_width >> 1, 630 ~ps_dec->u4_non_zero_cols, ~ps_dec->u4_non_zero_rows); 631 632 } 633 634 } 635 636 637 if((ps_dec->u2_cbp & 0x01) != 0) 638 { 639 pu1_out_p = ps_cur_frm_buf->pu1_v + u4_x_dst_offset + u4_y_dst_offset; 640 e_error = ps_dec->pf_vld_inv_quant(ps_dec, pi2_vld_out, ps_dec->pu1_inv_scan_matrix, 641 ps_dec->u2_prev_intra_mb, V_CHROMA, 0); 642 if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error) 643 { 644 return e_error; 645 } 646 647 648 IMPEG2D_IDCT_INP_STATISTICS(pi2_vld_out, ps_dec->u4_non_zero_cols, ps_dec->u4_non_zero_rows); 649 650 PROFILE_DISABLE_IDCT_IF0 651 { 652 WORD32 idx; 653 if(1 == (ps_dec->u4_non_zero_cols | ps_dec->u4_non_zero_rows)) 654 idx = 0; 655 else 656 idx = 1; 657 if(0 == ps_dec->u2_prev_intra_mb) 658 { 659 pu1_pred = pu1_out_p; 660 u4_pred_strd = ps_dec->u2_picture_width >> 1; 661 } 662 else 663 { 664 pu1_pred = (UWORD8 *)gau1_impeg2_zerobuf; 665 u4_pred_strd = 8; 666 } 667 668 ps_dec->pf_idct_recon[idx * 2 + ps_dec->i4_last_value_one](pi2_vld_out, 669 ps_dec->ai2_idct_stg1, 670 pu1_pred, 671 pu1_out_p, 672 8, 673 u4_pred_strd, 674 ps_dec->u2_picture_width >> 1, 675 ~ps_dec->u4_non_zero_cols, ~ps_dec->u4_non_zero_rows); 676 677 } 678 } 679 680 681 ps_dec->u2_num_mbs_left--; 682 ps_dec->u2_first_mb = 0; 683 ps_dec->u2_mb_x++; 684 685 if(ps_dec->s_bit_stream.u4_offset > ps_dec->s_bit_stream.u4_max_offset) 686 { 687 return IMPEG2D_BITSTREAM_BUFF_EXCEEDED_ERR; 688 } 689 else if (ps_dec->u2_mb_x == ps_dec->u2_num_horiz_mb) 690 { 691 ps_dec->u2_mb_x = 0; 692 ps_dec->u2_mb_y++; 693 694 } 695 } 696 while(ps_dec->u2_num_mbs_left != 0 && impeg2d_bit_stream_nxt(&ps_dec->s_bit_stream,23) != 0x0); 697 return e_error; 698} 699