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 ******************************************************************************* 23 * @file 24 * ih264e_cavlc.c 25 * 26 * @brief 27 * Contains all the routines to code syntax elements and residuals when entropy 28 * coding chosen is CAVLC 29 * 30 * @author 31 * ittiam 32 * 33 * @par List of Functions: 34 * - ih264e_compute_zeroruns_and_trailingones() 35 * - ih264e_write_coeff4x4_cavlc() 36 * - ih264e_write_coeff8x8_cavlc() 37 * - ih264e_encode_residue() 38 * - ih264e_write_islice_mb_cavlc() 39 * - ih264e_write_pslice_mb_cavlc() 40 * 41 * @remarks 42 * None 43 * 44 ******************************************************************************* 45 */ 46 47 /*****************************************************************************/ 48 /* File Includes */ 49 /*****************************************************************************/ 50 51 /* System include files */ 52 #include <stdio.h> 53 #include <assert.h> 54 #include <limits.h> 55 56 /* User include files */ 57 #include "ih264e_config.h" 58 #include "ih264_typedefs.h" 59 #include "iv2.h" 60 #include "ive2.h" 61 #include "ih264_debug.h" 62 #include "ih264_macros.h" 63 #include "ih264_defs.h" 64 #include "ih264e_defs.h" 65 #include "ih264e_error.h" 66 #include "ih264e_bitstream.h" 67 #include "ime_distortion_metrics.h" 68 #include "ime_defs.h" 69 #include "ime_structs.h" 70 #include "ih264_error.h" 71 #include "ih264_structs.h" 72 #include "ih264_trans_quant_itrans_iquant.h" 73 #include "ih264_inter_pred_filters.h" 74 #include "ih264_mem_fns.h" 75 #include "ih264_padding.h" 76 #include "ih264_intra_pred_filters.h" 77 #include "ih264_deblk_edge_filters.h" 78 #include "ih264_cabac_tables.h" 79 #include "irc_cntrl_param.h" 80 #include "irc_frame_info_collector.h" 81 #include "ih264e_rate_control.h" 82 #include "ih264e_cabac_structs.h" 83 #include "ih264e_structs.h" 84 #include "ih264e_encode_header.h" 85 #include "ih264_cavlc_tables.h" 86 #include "ih264e_cavlc.h" 87 #include "ih264e_statistics.h" 88 #include "ih264e_trace.h" 89 90 /*****************************************************************************/ 91 /* Function Definitions */ 92 /*****************************************************************************/ 93 94 /** 95 ******************************************************************************* 96 * 97 * @brief 98 * This function computes run of zero, number of trailing ones and sign of 99 * trailing ones basing on the significant coeff map, residual block and 100 * total nnz. 101 * 102 * @param[in] pi2_res_block 103 * Pointer to residual block containing levels in scan order 104 * 105 * @param[in] u4_total_coeff 106 * Total non-zero coefficients in that sub block 107 * 108 * @param[in] pu1_zero_run 109 * Pointer to array to store run of zeros 110 * 111 * @param[in] u4_sig_coeff_map 112 * significant coefficient map 113 * 114 * @returns u4_totzero_sign_trailone 115 * Bits 0-8 contains number of trailing ones. 116 * Bits 8-16 contains bitwise sign information of trailing one 117 * Bits 16-24 contains total number of zeros. 118 * 119 * @remarks 120 * None 121 * 122 ******************************************************************************* 123 */ 124 static UWORD32 ih264e_compute_zeroruns_and_trailingones(WORD16 *pi2_res_block, 125 UWORD32 u4_total_coeff, 126 UWORD8 *pu1_zero_run, 127 UWORD32 u4_sig_coeff_map) 128 { 129 UWORD32 i = 0; 130 UWORD32 u4_nnz_coeff = 0; 131 WORD32 i4_run = -1; 132 UWORD32 u4_sign = 0; 133 UWORD32 u4_tot_zero = 0; 134 UWORD32 u4_trailing1 = 0; 135 WORD32 i4_val; 136 UWORD32 u4_totzero_sign_trailone; 137 UWORD32 *pu4_zero_run; 138 139 pu4_zero_run = (void *)pu1_zero_run; 140 pu4_zero_run[0] = 0; 141 pu4_zero_run[1] = 0; 142 pu4_zero_run[2] = 0; 143 pu4_zero_run[3] = 0; 144 145 /* Compute Runs of zeros for all nnz coefficients except the last 3 */ 146 if (u4_total_coeff > 3) 147 { 148 for (i = 0; u4_nnz_coeff < (u4_total_coeff-3); i++) 149 { 150 i4_run++; 151 152 i4_val = (u4_sig_coeff_map & 0x1); 153 u4_sig_coeff_map >>= 1; 154 155 if (i4_val != 0) 156 { 157 pu1_zero_run[u4_nnz_coeff++] = i4_run; 158 i4_run = -1; 159 } 160 } 161 } 162 163 /* Compute T1's, Signof(T1's) and Runs of zeros for the last 3 */ 164 while (u4_nnz_coeff != u4_total_coeff) 165 { 166 i4_run++; 167 168 i4_val = (u4_sig_coeff_map & 0x1); 169 u4_sig_coeff_map >>= 1; 170 171 if (i4_val != 0) 172 { 173 if (pi2_res_block[u4_nnz_coeff] == 1) 174 { 175 pu1_zero_run[u4_nnz_coeff] = i4_run; 176 u4_trailing1++; 177 } 178 else 179 { 180 if (pi2_res_block[u4_nnz_coeff] == -1) 181 { 182 pu1_zero_run[u4_nnz_coeff] = i4_run; 183 u4_sign |= 1 << u4_trailing1; 184 u4_trailing1++; 185 } 186 else 187 { 188 pu1_zero_run[u4_nnz_coeff] = i4_run; 189 u4_trailing1 = 0; 190 u4_sign = 0; 191 } 192 } 193 i4_run = -1; 194 u4_nnz_coeff++; 195 } 196 i++; 197 } 198 199 u4_tot_zero = i - u4_total_coeff; 200 u4_totzero_sign_trailone = (u4_tot_zero << 16)|(u4_sign << 8)|u4_trailing1; 201 202 return (u4_totzero_sign_trailone); 203 } 204 205 /** 206 ******************************************************************************* 207 * 208 * @brief 209 * This function generates CAVLC coded bit stream for the given residual block 210 * 211 * @param[in] pi2_res_block 212 * Pointer to residual block containing levels in scan order 213 * 214 * @param[in] u4_total_coeff 215 * Total non-zero coefficients in the sub block 216 * 217 * @param[in] u4_block_type 218 * block type 219 * 220 * @param[in] pu1_zero_run 221 * Pointer to array to store run of zeros 222 * 223 * @param[in] u4_nc 224 * average of non zero coeff from top and left blocks (when available) 225 * 226 * @param[in, out] ps_bit_stream 227 * structure pointing to a buffer holding output bit stream 228 * 229 * @param[in] u4_sig_coeff_map 230 * significant coefficient map of the residual block 231 * 232 * @returns 233 * error code 234 * 235 * @remarks 236 * If the block type is CAVLC_CHROMA_4x4_DC, then u4_nc is non-significant 237 * 238 ******************************************************************************* 239 */ 240 static IH264E_ERROR_T ih264e_write_coeff4x4_cavlc(WORD16 *pi2_res_block, 241 UWORD32 u4_total_coeff, 242 ENTROPY_BLK_TYPE u4_block_type, 243 UWORD8 *pu1_zero_run, 244 UWORD32 u4_nc, 245 bitstrm_t *ps_bit_stream, 246 UWORD32 u4_sig_coeff_map) 247 { 248 IH264E_ERROR_T error_status = IH264E_SUCCESS; 249 UWORD32 u4_totzero_sign_trailone = 0; 250 UWORD32 u4_trailing_ones = 0; 251 UWORD32 u4_tot_zeros = 0; 252 UWORD32 u4_remaining_coeff = 0; 253 UWORD32 u4_sign1 = 0; 254 UWORD32 u4_max_num_coeff = 0; 255 const UWORD32 au4_max_num_nnz_coeff[] = {16, 15, 16, 4, 15}; 256 257 /* validate inputs */ 258 ASSERT(u4_block_type <= CAVLC_CHROMA_4x4_AC); 259 260 u4_max_num_coeff = au4_max_num_nnz_coeff[u4_block_type]; 261 262 ASSERT(u4_total_coeff <= u4_max_num_coeff); 263 264 if (!u4_total_coeff) 265 { 266 UWORD32 u4_codeword = 15; 267 UWORD32 u4_codesize = 1; 268 if (u4_block_type == CAVLC_CHROMA_4x4_DC) 269 { 270 u4_codeword = 1; 271 u4_codesize = 2; 272 DEBUG("\n[%d numcoeff, %d numtrailing ones]",u4_total_coeff, 0); 273 ENTROPY_TRACE("\tnumber of non zero coeffs ",u4_total_coeff); 274 ENTROPY_TRACE("\tnumber of trailing ones ",0); 275 } 276 else 277 { 278 UWORD32 u4_vlcnum = u4_nc >> 1; 279 280 /* write coeff_token */ 281 if (u4_vlcnum > 3) 282 { 283 /* Num-FLC */ 284 u4_codeword = 3; 285 u4_codesize = 6; 286 } 287 else 288 { 289 /* Num-VLC 0, 1, 2 */ 290 if (u4_vlcnum > 1) 291 { 292 u4_vlcnum = 2; 293 } 294 u4_codesize <<= u4_vlcnum; 295 u4_codeword >>= (4 - u4_codesize); 296 } 297 298 DEBUG("\n[%d numcoeff, %d numtrailing ones, %d nnz]",u4_total_coeff, 0, u4_nc); 299 ENTROPY_TRACE("\tnumber of non zero coeffs ",u4_total_coeff); 300 ENTROPY_TRACE("\tnC ",u4_nc); 301 } 302 303 304 DEBUG("\nCOEFF TOKEN 0: %d u4_codeword, %d u4_codesize",u4_codeword, u4_codesize); 305 ENTROPY_TRACE("\tcodeword ",u4_codeword); 306 ENTROPY_TRACE("\tcodesize ",u4_codesize); 307 308 error_status = ih264e_put_bits(ps_bit_stream, u4_codeword, u4_codesize); 309 310 return error_status; 311 } 312 else 313 { 314 /* Compute zero run, number of trailing ones and their sign. */ 315 u4_totzero_sign_trailone = 316 ih264e_compute_zeroruns_and_trailingones(pi2_res_block, 317 u4_total_coeff, 318 pu1_zero_run, 319 u4_sig_coeff_map); 320 u4_trailing_ones = u4_totzero_sign_trailone & 0xFF; 321 u4_sign1 = (u4_totzero_sign_trailone >> 8)& 0xFF; 322 u4_tot_zeros = (u4_totzero_sign_trailone >> 16) & 0xFF; 323 u4_remaining_coeff = u4_total_coeff - u4_trailing_ones; 324 325 /* write coeff_token */ 326 { 327 UWORD32 u4_codeword; 328 UWORD32 u4_codesize; 329 if (u4_block_type == CAVLC_CHROMA_4x4_DC) 330 { 331 u4_codeword = gu1_code_coeff_token_table_chroma[u4_trailing_ones][u4_total_coeff-1]; 332 u4_codesize = gu1_size_coeff_token_table_chroma[u4_trailing_ones][u4_total_coeff-1]; 333 334 DEBUG("\n[%d numcoeff, %d numtrailing ones]",u4_total_coeff, u4_trailing_ones); 335 ENTROPY_TRACE("\tnumber of non zero coeffs ",u4_total_coeff); 336 ENTROPY_TRACE("\tnumber of trailing ones ",u4_trailing_ones); 337 } 338 else 339 { 340 UWORD32 u4_vlcnum = u4_nc >> 1; 341 342 if (u4_vlcnum > 3) 343 { 344 /* Num-FLC */ 345 u4_codeword = ((u4_total_coeff-1) << 2 ) + u4_trailing_ones; 346 u4_codesize = 6; 347 } 348 else 349 { 350 /* Num-VLC 0, 1, 2 */ 351 if (u4_vlcnum > 1) 352 { 353 u4_vlcnum = 2; 354 } 355 u4_codeword = gu1_code_coeff_token_table[u4_vlcnum][u4_trailing_ones][u4_total_coeff-1]; 356 u4_codesize = gu1_size_coeff_token_table[u4_vlcnum][u4_trailing_ones][u4_total_coeff-1]; 357 } 358 359 DEBUG("\n[%d numcoeff, %d numtrailing ones, %d nnz]",u4_total_coeff, u4_trailing_ones, u4_nc); 360 ENTROPY_TRACE("\tnumber of non zero coeffs ",u4_total_coeff); 361 ENTROPY_TRACE("\tnumber of trailing ones ",u4_trailing_ones); 362 ENTROPY_TRACE("\tnC ",u4_nc); 363 } 364 365 DEBUG("\nCOEFF TOKEN 0: %d u4_codeword, %d u4_codesize",u4_codeword, u4_codesize); 366 ENTROPY_TRACE("\tcodeword ",u4_codeword); 367 ENTROPY_TRACE("\tcodesize ",u4_codesize); 368 369 error_status = ih264e_put_bits(ps_bit_stream, u4_codeword, u4_codesize); 370 } 371 372 /* write sign of trailing ones */ 373 if (u4_trailing_ones) 374 { 375 DEBUG("\nT1's: %d u4_codeword, %d u4_codesize",u4_sign1, u4_trailing_ones); 376 error_status = ih264e_put_bits(ps_bit_stream, u4_sign1, u4_trailing_ones); 377 ENTROPY_TRACE("\tnumber of trailing ones ",u4_trailing_ones); 378 ENTROPY_TRACE("\tsign of trailing ones ",u4_sign1); 379 } 380 381 /* write level codes */ 382 if (u4_remaining_coeff) 383 { 384 WORD32 i4_level = pi2_res_block[u4_remaining_coeff-1]; 385 UWORD32 u4_escape; 386 UWORD32 u4_suffix_length = 0; // Level-VLC[N] 387 UWORD32 u4_abs_level, u4_abs_level_actual = 0; 388 WORD32 i4_sign; 389 const UWORD32 u4_rndfactor[] = {0, 0, 1, 3, 7, 15, 31}; 390 391 DEBUG("\n \t%d coeff,",i4_level); 392 ENTROPY_TRACE("\tcoeff ",i4_level); 393 394 if (u4_trailing_ones < 3) 395 { 396 /* If there are less than 3 T1s, then the first non-T1 level is incremented if negative (decremented if positive)*/ 397 if (i4_level < 0) 398 { 399 i4_level += 1; 400 } 401 else 402 { 403 i4_level -= 1; 404 } 405 406 u4_abs_level_actual = 1; 407 408 /* Initialize VLC table (Suffix Length) to encode the level */ 409 if (u4_total_coeff > 10) 410 { 411 u4_suffix_length = 1; 412 } 413 } 414 415 i4_sign = (i4_level >> (sizeof(WORD32) * CHAR_BIT - 1)); 416 u4_abs_level = ((i4_level + i4_sign) ^ i4_sign); 417 418 u4_abs_level_actual += u4_abs_level; 419 420 u4_escape = (u4_abs_level + u4_rndfactor[u4_suffix_length]) >> u4_suffix_length; 421 422 while (1) 423 { 424 UWORD32 u4_codesize; 425 UWORD32 u4_codeword; 426 UWORD32 u4_codeval; 427 428 u4_remaining_coeff--; 429 430 GATHER_CAVLC_STATS1(); 431 432 { 433 u4_codeval = u4_abs_level << 1; 434 u4_codeval = u4_codeval - 2 - i4_sign; 435 436 if ((!u4_suffix_length) && (u4_escape > 7) && (u4_abs_level < 16)) 437 { 438 u4_codeword = (1 << 4) + (u4_codeval - 14); 439 u4_codesize = 19; 440 } 441 else if (u4_escape > 7) 442 { 443 u4_codeword = (1 << 12) + (u4_codeval - (15 << u4_suffix_length)); 444 u4_codesize = 28; 445 if (!u4_suffix_length) 446 { 447 u4_codeword -= 15; 448 } 449 } 450 else 451 { 452 u4_codeword = (1 << u4_suffix_length) + (u4_codeval & ((1 << u4_suffix_length)-1)); 453 u4_codesize = (u4_codeval >> u4_suffix_length) + 1 + u4_suffix_length; 454 } 455 } 456 457 /*put the level code in bitstream*/ 458 DEBUG("\nLEVEL: %d u4_codeword, %d u4_codesize",u4_codeword, u4_codesize); 459 ENTROPY_TRACE("\tcodeword ",u4_codeword); 460 ENTROPY_TRACE("\tcodesize ",u4_codesize); 461 error_status = ih264e_put_bits(ps_bit_stream, u4_codeword, u4_codesize); 462 463 if (u4_remaining_coeff == 0) break; 464 465 /*update suffix length for next level*/ 466 if (u4_suffix_length == 0) 467 { 468 u4_suffix_length++; 469 } 470 if (u4_suffix_length < 6) 471 { 472 if (u4_abs_level_actual > gu1_threshold_vlc_level[u4_suffix_length]) 473 { 474 u4_suffix_length++; 475 } 476 } 477 478 /* next level */ 479 i4_level = pi2_res_block[u4_remaining_coeff-1]; 480 481 DEBUG("\n \t%d coeff,",i4_level); 482 ENTROPY_TRACE("\tcoeff ",i4_level); 483 484 i4_sign = (i4_level >> (sizeof(WORD32) * CHAR_BIT - 1)); 485 u4_abs_level = ((i4_level + i4_sign) ^ i4_sign); 486 487 u4_abs_level_actual = u4_abs_level; 488 489 u4_escape = (u4_abs_level + u4_rndfactor[u4_suffix_length]) >> u4_suffix_length; 490 } 491 } 492 493 DEBUG("\n \t %d totalzeros",u4_tot_zeros); 494 ENTROPY_TRACE("\ttotal zeros ",u4_tot_zeros); 495 496 /* Write Total Zeros */ 497 if (u4_total_coeff < u4_max_num_coeff) 498 { 499 WORD32 index; 500 UWORD32 u4_codeword; 501 UWORD32 u4_codesize; 502 503 if (u4_block_type == CAVLC_CHROMA_4x4_DC) 504 { 505 UWORD8 gu1_index_zero_table_chroma[] = {0, 4, 7}; 506 index = gu1_index_zero_table_chroma[u4_total_coeff-1] + u4_tot_zeros; 507 u4_codesize = gu1_size_zero_table_chroma[index]; 508 u4_codeword = gu1_code_zero_table_chroma[index]; 509 } 510 else 511 { 512 index = gu1_index_zero_table[u4_total_coeff-1] + u4_tot_zeros; 513 u4_codesize = gu1_size_zero_table[index]; 514 u4_codeword = gu1_code_zero_table[index]; 515 } 516 517 DEBUG("\nTOTAL ZEROS: %d u4_codeword, %d u4_codesize",u4_codeword, u4_codesize); 518 ENTROPY_TRACE("\tcodeword ",u4_codeword); 519 ENTROPY_TRACE("\tcodesize ",u4_codesize); 520 error_status = ih264e_put_bits(ps_bit_stream, u4_codeword, u4_codesize); 521 } 522 523 /* Write Run Before */ 524 if (u4_tot_zeros) 525 { 526 UWORD32 u4_max_num_coef = u4_total_coeff-1; 527 UWORD32 u4_codeword; 528 UWORD32 u4_codesize; 529 UWORD32 u4_zeros_left = u4_tot_zeros; 530 531 while (u4_max_num_coef) 532 { 533 UWORD32 u4_run_before = pu1_zero_run[u4_max_num_coef]; 534 UWORD32 u4_index; 535 536 if (u4_zeros_left > MAX_ZERO_LEFT) 537 { 538 u4_index = gu1_index_run_table[MAX_ZERO_LEFT]; 539 } 540 else 541 { 542 u4_index = gu1_index_run_table[u4_zeros_left - 1]; 543 } 544 545 u4_codesize = gu1_size_run_table[u4_index + u4_run_before]; 546 u4_codeword = gu1_code_run_table[u4_index + u4_run_before]; 547 548 DEBUG("\nRUN BEFORE ZEROS: %d u4_codeword, %d u4_codesize",u4_codeword, u4_codesize); 549 ENTROPY_TRACE("\tcodeword ",u4_codeword); 550 ENTROPY_TRACE("\tcodesize ",u4_codesize); 551 error_status = ih264e_put_bits(ps_bit_stream, u4_codeword, u4_codesize); 552 553 u4_zeros_left -= u4_run_before; 554 if (!u4_zeros_left) 555 { 556 break; 557 } 558 u4_max_num_coef--; 559 } 560 } 561 } 562 563 return error_status; 564 } 565 566 /** 567 ******************************************************************************* 568 * 569 * @brief 570 * This function generates CAVLC coded bit stream for the given subblock 571 * 572 * @param[in] ps_ent_ctxt 573 * Pointer to entropy context 574 * 575 * @param[in] pi2_res_block 576 * Pointers to residual blocks of all the partitions for the current subblk 577 * (containing levels in scan order) 578 * 579 * @param[in] pu1_nnz 580 * Total non-zero coefficients of all the partitions for the current subblk 581 * 582 * @param[in] pu2_sig_coeff_map 583 * Significant coefficient map of all the partitions for the current subblk 584 * 585 * @param[in] u4_block_type 586 * entropy coding block type 587 * 588 * @param[in] u4_ngbr_avbl 589 * top and left availability of all the partitions for the current subblk 590 * (packed) 591 * 592 * @param[in] pu1_top_nnz 593 * pointer to the buffer containing nnz of all the subblks to the top 594 * 595 * @param[in] pu1_left_nnz 596 * pointer to the buffer containing nnz of all the subblks to the left 597 * 598 * @returns error status 599 * 600 * @remarks none 601 * 602 ******************************************************************************* 603 */ 604 static IH264E_ERROR_T ih264e_write_coeff8x8_cavlc(entropy_ctxt_t *ps_ent_ctxt, 605 WORD16 **pi2_res_block, 606 UWORD8 *pu1_nnz, 607 UWORD16 *pu2_sig_coeff_map, 608 ENTROPY_BLK_TYPE u4_block_type, 609 UWORD32 u4_ngbr_avlb, 610 UWORD8 *pu1_top_nnz, 611 UWORD8 *pu1_left_nnz) 612 { 613 IH264E_ERROR_T error_status = IH264E_SUCCESS; 614 bitstrm_t *ps_bitstream = ps_ent_ctxt->ps_bitstrm; 615 UWORD8 *pu1_zero_run = ps_ent_ctxt->au1_zero_run, *pu1_ngbr_avbl; 616 UWORD32 u4_nC; 617 UWORD8 u1_mb_a, u1_mb_b; 618 619 pu1_ngbr_avbl = (void *)(&u4_ngbr_avlb); 620 621 /* encode ac block index 4x4 = 0*/ 622 u1_mb_a = pu1_ngbr_avbl[0] & 0x0F; 623 u1_mb_b = pu1_ngbr_avbl[0] & 0xF0; 624 u4_nC = 0; 625 if (u1_mb_a) 626 u4_nC += pu1_left_nnz[0]; 627 if (u1_mb_b) 628 u4_nC += pu1_top_nnz[0]; 629 if (u1_mb_a && u1_mb_b) 630 u4_nC = (u4_nC + 1) >> 1; 631 pu1_left_nnz[0] = pu1_top_nnz[0] = pu1_nnz[0]; 632 error_status = ih264e_write_coeff4x4_cavlc(pi2_res_block[0], pu1_nnz[0], u4_block_type, pu1_zero_run, u4_nC, ps_bitstream, pu2_sig_coeff_map[0]); 633 634 /* encode ac block index 4x4 = 1*/ 635 u1_mb_a = pu1_ngbr_avbl[1] & 0x0F; 636 u1_mb_b = pu1_ngbr_avbl[1] & 0xF0; 637 u4_nC = 0; 638 if (u1_mb_a) 639 u4_nC += pu1_left_nnz[0]; 640 if (u1_mb_b) 641 u4_nC += pu1_top_nnz[1]; 642 if (u1_mb_a && u1_mb_b) 643 u4_nC = (u4_nC + 1) >> 1; 644 pu1_left_nnz[0] = pu1_top_nnz[1] = pu1_nnz[1]; 645 error_status = ih264e_write_coeff4x4_cavlc(pi2_res_block[1], pu1_nnz[1], u4_block_type, pu1_zero_run, u4_nC, ps_bitstream, pu2_sig_coeff_map[1]); 646 647 /* encode ac block index 4x4 = 2*/ 648 u1_mb_a = pu1_ngbr_avbl[2] & 0x0F; 649 u1_mb_b = pu1_ngbr_avbl[2] & 0xF0; 650 u4_nC = 0; 651 if (u1_mb_a) 652 u4_nC += pu1_left_nnz[1]; 653 if (u1_mb_b) 654 u4_nC += pu1_top_nnz[0]; 655 if (u1_mb_a && u1_mb_b) 656 u4_nC = (u4_nC + 1) >> 1; 657 pu1_left_nnz[1] = pu1_top_nnz[0] = pu1_nnz[2]; 658 error_status = ih264e_write_coeff4x4_cavlc(pi2_res_block[2], pu1_nnz[2], u4_block_type, pu1_zero_run, u4_nC, ps_bitstream, pu2_sig_coeff_map[2]); 659 660 /* encode ac block index 4x4 = 0*/ 661 u1_mb_a = pu1_ngbr_avbl[3] & 0x0F; 662 u1_mb_b = pu1_ngbr_avbl[3] & 0xF0; 663 u4_nC = 0; 664 if (u1_mb_a) 665 u4_nC += pu1_left_nnz[1]; 666 if (u1_mb_b) 667 u4_nC += pu1_top_nnz[1]; 668 if (u1_mb_a && u1_mb_b) 669 u4_nC = (u4_nC + 1) >> 1; 670 pu1_left_nnz[1] = pu1_top_nnz[1] = pu1_nnz[3]; 671 error_status = ih264e_write_coeff4x4_cavlc(pi2_res_block[3], pu1_nnz[3], u4_block_type, pu1_zero_run, u4_nC, ps_bitstream, pu2_sig_coeff_map[3]); 672 673 return error_status; 674 } 675 676 /** 677 ******************************************************************************* 678 * 679 * @brief 680 * This function encodes luma and chroma residues of a macro block when 681 * the entropy coding mode chosen is cavlc. 682 * 683 * @param[in] ps_ent_ctxt 684 * Pointer to entropy context 685 * 686 * @param[in] u4_mb_type 687 * current mb type 688 * 689 * @param[in] u4_cbp 690 * coded block pattern for the current mb 691 * 692 * @returns error code 693 * 694 * @remarks none 695 * 696 ******************************************************************************* 697 */ 698 static IH264E_ERROR_T ih264e_encode_residue(entropy_ctxt_t *ps_ent_ctxt, 699 UWORD32 u4_mb_type, 700 UWORD32 u4_cbp) 701 { 702 /* error status */ 703 IH264E_ERROR_T error_status = IH264E_SUCCESS; 704 705 /* packed residue */ 706 void *pv_mb_coeff_data = ps_ent_ctxt->pv_mb_coeff_data; 707 708 /* bit stream buffer */ 709 bitstrm_t *ps_bitstream = ps_ent_ctxt->ps_bitstrm; 710 711 /* zero run */ 712 UWORD8 *pu1_zero_run = ps_ent_ctxt->au1_zero_run; 713 714 /* temp var */ 715 UWORD32 u4_nC, u4_ngbr_avlb; 716 UWORD8 au1_nnz[4], *pu1_ngbr_avlb, *pu1_top_nnz, *pu1_left_nnz; 717 UWORD16 au2_sig_coeff_map[4] = {0}; 718 WORD16 *pi2_res_block[4] = {NULL}; 719 UWORD8 *pu1_slice_idx = ps_ent_ctxt->pu1_slice_idx; 720 tu_sblk_coeff_data_t *ps_mb_coeff_data; 721 ENTROPY_BLK_TYPE e_entropy_blk_type = CAVLC_LUMA_4x4; 722 723 /* ngbr availability */ 724 UWORD8 u1_mb_a, u1_mb_b; 725 726 /* cbp */ 727 UWORD32 u4_cbp_luma = u4_cbp & 0xF, u4_cbp_chroma = u4_cbp >> 4; 728 729 /* mb indices */ 730 WORD32 i4_mb_x, i4_mb_y; 731 732 /* derive neighbor availability */ 733 i4_mb_x = ps_ent_ctxt->i4_mb_x; 734 i4_mb_y = ps_ent_ctxt->i4_mb_y; 735 pu1_slice_idx += (i4_mb_y * ps_ent_ctxt->i4_wd_mbs); 736 /* left macroblock availability */ 737 u1_mb_a = (i4_mb_x == 0 || 738 (pu1_slice_idx[i4_mb_x - 1 ] != pu1_slice_idx[i4_mb_x]))? 0 : 1; 739 /* top macroblock availability */ 740 u1_mb_b = (i4_mb_y == 0 || 741 (pu1_slice_idx[i4_mb_x-ps_ent_ctxt->i4_wd_mbs] != pu1_slice_idx[i4_mb_x]))? 0 : 1; 742 743 pu1_ngbr_avlb = (void *)(&u4_ngbr_avlb); 744 pu1_top_nnz = ps_ent_ctxt->pu1_top_nnz_luma[ps_ent_ctxt->i4_mb_x]; 745 pu1_left_nnz = (UWORD8 *)&ps_ent_ctxt->u4_left_nnz_luma; 746 747 /* encode luma residue */ 748 749 /* mb type intra 16x16 */ 750 if (u4_mb_type == I16x16) 751 { 752 /* parse packed coeff data structure for residual data */ 753 PARSE_COEFF_DATA_BLOCK_4x4(pv_mb_coeff_data, ps_mb_coeff_data, au1_nnz[0], au2_sig_coeff_map[0], pi2_res_block[0]); 754 /* estimate nnz for the current mb */ 755 u4_nC = 0; 756 if (u1_mb_a) 757 u4_nC += pu1_left_nnz[0]; 758 if (u1_mb_b) 759 u4_nC += pu1_top_nnz[0]; 760 if (u1_mb_a && u1_mb_b) 761 u4_nC = (u4_nC + 1) >> 1; 762 763 /* encode dc block */ 764 ENTROPY_TRACE("Luma DC blk idx %d",0); 765 error_status = ih264e_write_coeff4x4_cavlc(pi2_res_block[0], au1_nnz[0], CAVLC_LUMA_4x4_DC, pu1_zero_run, u4_nC, ps_bitstream, au2_sig_coeff_map[0]); 766 767 e_entropy_blk_type = CAVLC_LUMA_4x4_AC; 768 } 769 770 if (u4_cbp_luma & 1) 771 { 772 /* encode ac block index 8x8 = 0*/ 773 /* parse packed coeff data structure for residual data */ 774 PARSE_COEFF_DATA_BLOCK_4x4(pv_mb_coeff_data, ps_mb_coeff_data, au1_nnz[0], au2_sig_coeff_map[0], pi2_res_block[0]); 775 PARSE_COEFF_DATA_BLOCK_4x4(pv_mb_coeff_data, ps_mb_coeff_data, au1_nnz[1], au2_sig_coeff_map[1], pi2_res_block[1]); 776 PARSE_COEFF_DATA_BLOCK_4x4(pv_mb_coeff_data, ps_mb_coeff_data, au1_nnz[2], au2_sig_coeff_map[2], pi2_res_block[2]); 777 PARSE_COEFF_DATA_BLOCK_4x4(pv_mb_coeff_data, ps_mb_coeff_data, au1_nnz[3], au2_sig_coeff_map[3], pi2_res_block[3]); 778 /* derive sub block neighbor availability */ 779 780 pu1_ngbr_avlb[0] = (u1_mb_b << 4) | (u1_mb_a); 781 pu1_ngbr_avlb[1] = (u1_mb_b << 4) | 1; 782 pu1_ngbr_avlb[2] = (1 << 4) | (u1_mb_a); 783 pu1_ngbr_avlb[3] = 0x11; 784 /* encode sub blk */ 785 ENTROPY_TRACE("Luma blk idx %d",0); 786 error_status = ih264e_write_coeff8x8_cavlc(ps_ent_ctxt, pi2_res_block, au1_nnz, au2_sig_coeff_map, e_entropy_blk_type, u4_ngbr_avlb, pu1_top_nnz, pu1_left_nnz); 787 } 788 else 789 { 790 pu1_top_nnz[0] = pu1_top_nnz[1] = 0; 791 pu1_left_nnz[0] = pu1_left_nnz[1] = 0; 792 } 793 794 if (u4_cbp_luma & 2) 795 { 796 /* encode ac block index 8x8 = 1*/ 797 /* parse packed coeff data structure for residual data */ 798 PARSE_COEFF_DATA_BLOCK_4x4(pv_mb_coeff_data, ps_mb_coeff_data, au1_nnz[0], au2_sig_coeff_map[0], pi2_res_block[0]); 799 PARSE_COEFF_DATA_BLOCK_4x4(pv_mb_coeff_data, ps_mb_coeff_data, au1_nnz[1], au2_sig_coeff_map[1], pi2_res_block[1]); 800 PARSE_COEFF_DATA_BLOCK_4x4(pv_mb_coeff_data, ps_mb_coeff_data, au1_nnz[2], au2_sig_coeff_map[2], pi2_res_block[2]); 801 PARSE_COEFF_DATA_BLOCK_4x4(pv_mb_coeff_data, ps_mb_coeff_data, au1_nnz[3], au2_sig_coeff_map[3], pi2_res_block[3]); 802 803 /* derive sub block neighbor availability */ 804 pu1_ngbr_avlb[1] = pu1_ngbr_avlb[0] = (u1_mb_b << 4) | 1; 805 pu1_ngbr_avlb[3] = pu1_ngbr_avlb[2] = 0x11; 806 /* encode sub blk */ 807 ENTROPY_TRACE("Luma blk idx %d",1); 808 error_status = ih264e_write_coeff8x8_cavlc(ps_ent_ctxt, pi2_res_block, au1_nnz, au2_sig_coeff_map, e_entropy_blk_type, u4_ngbr_avlb, pu1_top_nnz+2, pu1_left_nnz); 809 } 810 else 811 { 812 (pu1_top_nnz + 2)[0] = (pu1_top_nnz + 2)[1] = 0; 813 pu1_left_nnz[0] = pu1_left_nnz[1] = 0; 814 } 815 816 if (u4_cbp_luma & 0x4) 817 { 818 /* encode ac block index 8x8 = 2*/ 819 /* parse packed coeff data structure for residual data */ 820 PARSE_COEFF_DATA_BLOCK_4x4(pv_mb_coeff_data, ps_mb_coeff_data, au1_nnz[0], au2_sig_coeff_map[0], pi2_res_block[0]); 821 PARSE_COEFF_DATA_BLOCK_4x4(pv_mb_coeff_data, ps_mb_coeff_data, au1_nnz[1], au2_sig_coeff_map[1], pi2_res_block[1]); 822 PARSE_COEFF_DATA_BLOCK_4x4(pv_mb_coeff_data, ps_mb_coeff_data, au1_nnz[2], au2_sig_coeff_map[2], pi2_res_block[2]); 823 PARSE_COEFF_DATA_BLOCK_4x4(pv_mb_coeff_data, ps_mb_coeff_data, au1_nnz[3], au2_sig_coeff_map[3], pi2_res_block[3]); 824 825 /* derive sub block neighbor availability */ 826 pu1_ngbr_avlb[2] = pu1_ngbr_avlb[0] = (1 << 4) | u1_mb_a; 827 pu1_ngbr_avlb[1] = pu1_ngbr_avlb[3] = 0x11; 828 /* encode sub blk */ 829 ENTROPY_TRACE("Luma blk idx %d",2); 830 error_status = ih264e_write_coeff8x8_cavlc(ps_ent_ctxt, pi2_res_block, au1_nnz, au2_sig_coeff_map, e_entropy_blk_type, u4_ngbr_avlb, pu1_top_nnz, (pu1_left_nnz+2)); 831 } 832 else 833 { 834 pu1_top_nnz[0] = pu1_top_nnz[1] = 0; 835 (pu1_left_nnz + 2)[0] = (pu1_left_nnz + 2)[1] = 0; 836 } 837 838 if (u4_cbp_luma & 0x8) 839 { 840 /* encode ac block index 8x8 = 3*/ 841 /* parse packed coeff data structure for residual data */ 842 PARSE_COEFF_DATA_BLOCK_4x4(pv_mb_coeff_data, ps_mb_coeff_data, au1_nnz[0], au2_sig_coeff_map[0], pi2_res_block[0]); 843 PARSE_COEFF_DATA_BLOCK_4x4(pv_mb_coeff_data, ps_mb_coeff_data, au1_nnz[1], au2_sig_coeff_map[1], pi2_res_block[1]); 844 PARSE_COEFF_DATA_BLOCK_4x4(pv_mb_coeff_data, ps_mb_coeff_data, au1_nnz[2], au2_sig_coeff_map[2], pi2_res_block[2]); 845 PARSE_COEFF_DATA_BLOCK_4x4(pv_mb_coeff_data, ps_mb_coeff_data, au1_nnz[3], au2_sig_coeff_map[3], pi2_res_block[3]); 846 847 /* derive sub block neighbor availability */ 848 u4_ngbr_avlb = 0x11111111; 849 /* encode sub blk */ 850 ENTROPY_TRACE("Luma blk idx %d",3); 851 error_status = ih264e_write_coeff8x8_cavlc(ps_ent_ctxt, pi2_res_block, au1_nnz, au2_sig_coeff_map, e_entropy_blk_type, u4_ngbr_avlb, pu1_top_nnz+2, pu1_left_nnz+2); 852 } 853 else 854 { 855 (pu1_top_nnz + 2)[0] = (pu1_top_nnz + 2)[1] = 0; 856 (pu1_left_nnz + 2)[0] = (pu1_left_nnz + 2)[1] = 0; 857 } 858 859 /* encode chroma residue */ 860 if (u4_cbp_chroma & 3) 861 { 862 /* parse packed coeff data structure for residual data */ 863 /* cb, cr */ 864 PARSE_COEFF_DATA_BLOCK_4x4(pv_mb_coeff_data, ps_mb_coeff_data, au1_nnz[0], au2_sig_coeff_map[0], pi2_res_block[0]); 865 PARSE_COEFF_DATA_BLOCK_4x4(pv_mb_coeff_data, ps_mb_coeff_data, au1_nnz[1], au2_sig_coeff_map[1], pi2_res_block[1]); 866 867 /* encode dc block */ 868 /* cb, cr */ 869 ENTROPY_TRACE("Chroma DC blk idx %d",0); 870 error_status = ih264e_write_coeff4x4_cavlc(pi2_res_block[0], au1_nnz[0], CAVLC_CHROMA_4x4_DC, pu1_zero_run, 0, ps_bitstream, au2_sig_coeff_map[0]); 871 ENTROPY_TRACE("Chroma DC blk idx %d",1); 872 error_status = ih264e_write_coeff4x4_cavlc(pi2_res_block[1], au1_nnz[1], CAVLC_CHROMA_4x4_DC, pu1_zero_run, 0, ps_bitstream, au2_sig_coeff_map[1]); 873 } 874 875 pu1_top_nnz = ps_ent_ctxt->pu1_top_nnz_cbcr[ps_ent_ctxt->i4_mb_x]; 876 pu1_left_nnz = (UWORD8 *) &ps_ent_ctxt->u4_left_nnz_cbcr; 877 878 /* encode sub blk */ 879 if (u4_cbp_chroma & 0x2) 880 { 881 /* encode ac block index 8x8 = 0*/ 882 /* derive sub block neighbor availability */ 883 pu1_ngbr_avlb[0] = (u1_mb_b << 4) | (u1_mb_a); 884 pu1_ngbr_avlb[1] = (u1_mb_b << 4) | 1; 885 pu1_ngbr_avlb[2] = (1 << 4) | (u1_mb_a); 886 pu1_ngbr_avlb[3] = 0x11; 887 888 /* parse packed coeff data structure for residual data */ 889 PARSE_COEFF_DATA_BLOCK_4x4(pv_mb_coeff_data, ps_mb_coeff_data, au1_nnz[0], au2_sig_coeff_map[0], pi2_res_block[0]); 890 PARSE_COEFF_DATA_BLOCK_4x4(pv_mb_coeff_data, ps_mb_coeff_data, au1_nnz[1], au2_sig_coeff_map[1], pi2_res_block[1]); 891 PARSE_COEFF_DATA_BLOCK_4x4(pv_mb_coeff_data, ps_mb_coeff_data, au1_nnz[2], au2_sig_coeff_map[2], pi2_res_block[2]); 892 PARSE_COEFF_DATA_BLOCK_4x4(pv_mb_coeff_data, ps_mb_coeff_data, au1_nnz[3], au2_sig_coeff_map[3], pi2_res_block[3]); 893 894 ENTROPY_TRACE("Chroma AC blk idx %d",0); 895 error_status = ih264e_write_coeff8x8_cavlc(ps_ent_ctxt, pi2_res_block, au1_nnz, au2_sig_coeff_map, CAVLC_CHROMA_4x4_AC, u4_ngbr_avlb, pu1_top_nnz, pu1_left_nnz); 896 } 897 else 898 { 899 pu1_top_nnz[0] = pu1_top_nnz[1] = 0; 900 pu1_left_nnz[0] = pu1_left_nnz[1] = 0; 901 } 902 903 pu1_top_nnz += 2; 904 pu1_left_nnz += 2; 905 906 /* encode sub blk */ 907 if (u4_cbp_chroma & 0x2) 908 { 909 /* parse packed coeff data structure for residual data */ 910 PARSE_COEFF_DATA_BLOCK_4x4(pv_mb_coeff_data, ps_mb_coeff_data, au1_nnz[0], au2_sig_coeff_map[0], pi2_res_block[0]); 911 PARSE_COEFF_DATA_BLOCK_4x4(pv_mb_coeff_data, ps_mb_coeff_data, au1_nnz[1], au2_sig_coeff_map[1], pi2_res_block[1]); 912 PARSE_COEFF_DATA_BLOCK_4x4(pv_mb_coeff_data, ps_mb_coeff_data, au1_nnz[2], au2_sig_coeff_map[2], pi2_res_block[2]); 913 PARSE_COEFF_DATA_BLOCK_4x4(pv_mb_coeff_data, ps_mb_coeff_data, au1_nnz[3], au2_sig_coeff_map[3], pi2_res_block[3]); 914 915 ENTROPY_TRACE("Chroma AC blk idx %d",1); 916 error_status = ih264e_write_coeff8x8_cavlc(ps_ent_ctxt, pi2_res_block, au1_nnz, au2_sig_coeff_map, CAVLC_CHROMA_4x4_AC, u4_ngbr_avlb, pu1_top_nnz, pu1_left_nnz); 917 } 918 else 919 { 920 pu1_top_nnz[0] = pu1_top_nnz[1] = 0; 921 pu1_left_nnz[0] = pu1_left_nnz[1] = 0; 922 } 923 924 /* store the index of the next mb coeff data */ 925 ps_ent_ctxt->pv_mb_coeff_data = pv_mb_coeff_data; 926 927 return error_status; 928 } 929 930 931 /** 932 ******************************************************************************* 933 * 934 * @brief 935 * This function generates CAVLC coded bit stream for an Intra Slice. 936 * 937 * @description 938 * The mb syntax layer for intra slices constitutes luma mb mode, luma sub modes 939 * (if present), mb qp delta, coded block pattern, chroma mb mode and 940 * luma/chroma residue. These syntax elements are written as directed by table 941 * 7.3.5 of h264 specification. 942 * 943 * @param[in] ps_ent_ctxt 944 * pointer to entropy context 945 * 946 * @returns error code 947 * 948 * @remarks none 949 * 950 ******************************************************************************* 951 */ 952 IH264E_ERROR_T ih264e_write_islice_mb_cavlc(entropy_ctxt_t *ps_ent_ctxt) 953 { 954 /* error status */ 955 IH264E_ERROR_T error_status = IH264E_SUCCESS; 956 957 /* bit stream ptr */ 958 bitstrm_t *ps_bitstream = ps_ent_ctxt->ps_bitstrm; 959 960 /* packed header data */ 961 UWORD8 *pu1_byte = ps_ent_ctxt->pv_mb_header_data; 962 963 /* mb header info */ 964 /* 965 * mb_tpm : mb type plus mode 966 * mb_type : luma mb type and chroma mb type are packed 967 * cbp : coded block pattern 968 * mb_qp_delta : mb qp delta 969 * chroma_intra_mode : chroma intra mode 970 * luma_intra_mode : luma intra mode 971 */ 972 WORD32 mb_tpm, mb_type, cbp, chroma_intra_mode, luma_intra_mode; 973 WORD8 mb_qp_delta; 974 975 /* temp var */ 976 WORD32 i, mb_type_stream; 977 978 WORD32 bitstream_start_offset, bitstream_end_offset; 979 980 /* Starting bitstream offset for header in bits */ 981 bitstream_start_offset = GET_NUM_BITS(ps_bitstream); 982 983 984 /********************************************************************/ 985 /* BEGIN HEADER GENERATION */ 986 /********************************************************************/ 987 988 /* mb header info */ 989 mb_tpm = *pu1_byte++; 990 cbp = *pu1_byte++; 991 mb_qp_delta = *pu1_byte++; 992 993 /* mb type */ 994 mb_type = mb_tpm & 0xF; 995 /* is intra ? */ 996 if (mb_type == I16x16) 997 { 998 UWORD32 u4_cbp_l, u4_cbp_c; 999 1000 u4_cbp_c = (cbp >> 4); 1001 u4_cbp_l = (cbp & 0xF); 1002 luma_intra_mode = (mb_tpm >> 4) & 3; 1003 chroma_intra_mode = (mb_tpm >> 6); 1004 1005 mb_type_stream = luma_intra_mode + 1 + (u4_cbp_c << 2) + (u4_cbp_l == 15) * 12; 1006 1007 /* write mb type */ 1008 PUT_BITS_UEV(ps_bitstream, mb_type_stream, error_status, "mb type"); 1009 1010 /* intra_chroma_pred_mode */ 1011 PUT_BITS_UEV(ps_bitstream, chroma_intra_mode, error_status, "intra_chroma_pred_mode"); 1012 } 1013 else if (mb_type == I4x4) 1014 { 1015 /* mb sub blk modes */ 1016 WORD32 intra_pred_mode_flag, rem_intra_mode; 1017 WORD32 byte; 1018 1019 chroma_intra_mode = (mb_tpm >> 6); 1020 1021 /* write mb type */ 1022 PUT_BITS_UEV(ps_bitstream, 0, error_status, "mb type"); 1023 1024 for (i = 0; i < 16; i += 2) 1025 { 1026 /* sub blk idx 1 */ 1027 byte = *pu1_byte++; 1028 1029 intra_pred_mode_flag = byte & 0x1; 1030 1031 /* prev_intra4x4_pred_mode_flag */ 1032 PUT_BITS(ps_bitstream, intra_pred_mode_flag, 1, error_status, "prev_intra4x4_pred_mode_flag"); 1033 1034 /* rem_intra4x4_pred_mode */ 1035 if (!intra_pred_mode_flag) 1036 { 1037 rem_intra_mode = (byte & 0xF) >> 1; 1038 PUT_BITS(ps_bitstream, rem_intra_mode, 3, error_status, "rem_intra4x4_pred_mode"); 1039 } 1040 1041 /* sub blk idx 2 */ 1042 byte >>= 4; 1043 1044 intra_pred_mode_flag = byte & 0x1; 1045 1046 /* prev_intra4x4_pred_mode_flag */ 1047 PUT_BITS(ps_bitstream, intra_pred_mode_flag, 1, error_status, "prev_intra4x4_pred_mode_flag"); 1048 1049 /* rem_intra4x4_pred_mode */ 1050 if (!intra_pred_mode_flag) 1051 { 1052 rem_intra_mode = (byte & 0xF) >> 1; 1053 PUT_BITS(ps_bitstream, rem_intra_mode, 3, error_status, "rem_intra4x4_pred_mode"); 1054 } 1055 } 1056 1057 /* intra_chroma_pred_mode */ 1058 PUT_BITS_UEV(ps_bitstream, chroma_intra_mode, error_status, "intra_chroma_pred_mode"); 1059 } 1060 else if (mb_type == I8x8) 1061 { 1062 /* transform 8x8 flag */ 1063 UWORD32 u4_transform_size_8x8_flag = ps_ent_ctxt->i1_transform_8x8_mode_flag; 1064 1065 /* mb sub blk modes */ 1066 WORD32 intra_pred_mode_flag, rem_intra_mode; 1067 WORD32 byte; 1068 1069 chroma_intra_mode = (mb_tpm >> 6); 1070 1071 ASSERT(0); 1072 1073 /* write mb type */ 1074 PUT_BITS_UEV(ps_bitstream, 0, error_status, "mb type"); 1075 1076 /* u4_transform_size_8x8_flag */ 1077 PUT_BITS(ps_bitstream, u4_transform_size_8x8_flag, 1, error_status, "u4_transform_size_8x8_flag"); 1078 1079 /* write sub block modes */ 1080 for (i = 0; i < 4; i++) 1081 { 1082 /* sub blk idx 1 */ 1083 byte = *pu1_byte++; 1084 1085 intra_pred_mode_flag = byte & 0x1; 1086 1087 /* prev_intra4x4_pred_mode_flag */ 1088 PUT_BITS(ps_bitstream, intra_pred_mode_flag, 1, error_status, "prev_intra4x4_pred_mode_flag"); 1089 1090 /* rem_intra4x4_pred_mode */ 1091 if (!intra_pred_mode_flag) 1092 { 1093 rem_intra_mode = (byte & 0xF) >> 1; 1094 PUT_BITS(ps_bitstream, rem_intra_mode, 3, error_status, "rem_intra4x4_pred_mode"); 1095 } 1096 1097 /* sub blk idx 2 */ 1098 byte >>= 4; 1099 1100 intra_pred_mode_flag = byte & 0x1; 1101 1102 /* prev_intra4x4_pred_mode_flag */ 1103 PUT_BITS(ps_bitstream, intra_pred_mode_flag, 1, error_status, "prev_intra4x4_pred_mode_flag"); 1104 1105 /* rem_intra4x4_pred_mode */ 1106 if (!intra_pred_mode_flag) 1107 { 1108 rem_intra_mode = (byte & 0xF) >> 1; 1109 PUT_BITS(ps_bitstream, rem_intra_mode, 3, error_status, "rem_intra4x4_pred_mode"); 1110 } 1111 } 1112 1113 /* intra_chroma_pred_mode */ 1114 PUT_BITS_UEV(ps_bitstream, chroma_intra_mode, error_status, "intra_chroma_pred_mode"); 1115 } 1116 else 1117 { 1118 } 1119 1120 /* coded_block_pattern */ 1121 if (mb_type != I16x16) 1122 { 1123 PUT_BITS_UEV(ps_bitstream, gu1_cbp_map_tables[cbp][0], error_status, "coded_block_pattern"); 1124 } 1125 1126 if (cbp || mb_type == I16x16) 1127 { 1128 /* mb_qp_delta */ 1129 PUT_BITS_SEV(ps_bitstream, mb_qp_delta, error_status, "mb_qp_delta"); 1130 } 1131 1132 /* Ending bitstream offset for header in bits */ 1133 bitstream_end_offset = GET_NUM_BITS(ps_bitstream); 1134 1135 ps_ent_ctxt->u4_header_bits[0] += bitstream_end_offset - bitstream_start_offset; 1136 1137 /* Starting bitstream offset for residue */ 1138 bitstream_start_offset = bitstream_end_offset; 1139 1140 /* residual */ 1141 error_status = ih264e_encode_residue(ps_ent_ctxt, mb_type, cbp); 1142 1143 /* Ending bitstream offset for reside in bits */ 1144 bitstream_end_offset = GET_NUM_BITS(ps_bitstream); 1145 ps_ent_ctxt->u4_residue_bits[0] += bitstream_end_offset - bitstream_start_offset; 1146 1147 /* store the index of the next mb syntax layer */ 1148 ps_ent_ctxt->pv_mb_header_data = pu1_byte; 1149 1150 return error_status; 1151 } 1152 1153 /** 1154 ******************************************************************************* 1155 * 1156 * @brief 1157 * This function generates CAVLC coded bit stream for Inter slices 1158 * 1159 * @description 1160 * The mb syntax layer for inter slices constitutes luma mb mode, luma sub modes 1161 * (if present), mb qp delta, coded block pattern, chroma mb mode and 1162 * luma/chroma residue. These syntax elements are written as directed by table 1163 * 7.3.5 of h264 specification 1164 * 1165 * @param[in] ps_ent_ctxt 1166 * pointer to entropy context 1167 * 1168 * @returns error code 1169 * 1170 * @remarks none 1171 * 1172 ******************************************************************************* 1173 */ 1174 IH264E_ERROR_T ih264e_write_pslice_mb_cavlc(entropy_ctxt_t *ps_ent_ctxt) 1175 { 1176 /* error status */ 1177 IH264E_ERROR_T error_status = IH264E_SUCCESS; 1178 1179 /* bit stream ptr */ 1180 bitstrm_t *ps_bitstream = ps_ent_ctxt->ps_bitstrm; 1181 1182 /* packed header data */ 1183 UWORD8 *pu1_byte = ps_ent_ctxt->pv_mb_header_data; 1184 1185 /* mb header info */ 1186 /* 1187 * mb_tpm : mb type plus mode 1188 * mb_type : luma mb type and chroma mb type are packed 1189 * cbp : coded block pattern 1190 * mb_qp_delta : mb qp delta 1191 * chroma_intra_mode : chroma intra mode 1192 * luma_intra_mode : luma intra mode 1193 * ps_pu : Pointer to the array of structures having motion vectors, size 1194 * and position of sub partitions 1195 */ 1196 WORD32 mb_tpm, mb_type, cbp, chroma_intra_mode, luma_intra_mode; 1197 WORD8 mb_qp_delta; 1198 1199 /* temp var */ 1200 WORD32 i, mb_type_stream, cbptable = 1; 1201 1202 WORD32 is_inter = 0; 1203 1204 WORD32 bitstream_start_offset, bitstream_end_offset; 1205 1206 /* Starting bitstream offset for header in bits */ 1207 bitstream_start_offset = GET_NUM_BITS(ps_bitstream); 1208 1209 /********************************************************************/ 1210 /* BEGIN HEADER GENERATION */ 1211 /********************************************************************/ 1212 1213 /* mb header info */ 1214 mb_tpm = *pu1_byte++; 1215 1216 /* mb type */ 1217 mb_type = mb_tpm & 0xF; 1218 1219 /* check for skip */ 1220 if (mb_type == PSKIP) 1221 { 1222 UWORD32 *nnz; 1223 1224 is_inter = 1; 1225 1226 /* increment skip counter */ 1227 (*ps_ent_ctxt->pi4_mb_skip_run)++; 1228 1229 /* store the index of the next mb syntax layer */ 1230 ps_ent_ctxt->pv_mb_header_data = pu1_byte; 1231 1232 /* set nnz to zero */ 1233 ps_ent_ctxt->u4_left_nnz_luma = 0; 1234 nnz = (UWORD32 *)ps_ent_ctxt->pu1_top_nnz_luma[ps_ent_ctxt->i4_mb_x]; 1235 *nnz = 0; 1236 ps_ent_ctxt->u4_left_nnz_cbcr = 0; 1237 nnz = (UWORD32 *)ps_ent_ctxt->pu1_top_nnz_cbcr[ps_ent_ctxt->i4_mb_x]; 1238 *nnz = 0; 1239 1240 /* residual */ 1241 error_status = ih264e_encode_residue(ps_ent_ctxt, P16x16, 0); 1242 1243 bitstream_end_offset = GET_NUM_BITS(ps_bitstream); 1244 1245 ps_ent_ctxt->u4_header_bits[is_inter] += bitstream_end_offset - bitstream_start_offset; 1246 1247 return error_status; 1248 } 1249 1250 /* remaining mb header info */ 1251 cbp = *pu1_byte++; 1252 mb_qp_delta = *pu1_byte++; 1253 1254 /* mb skip run */ 1255 PUT_BITS_UEV(ps_bitstream, *ps_ent_ctxt->pi4_mb_skip_run, error_status, "mb skip run"); 1256 1257 /* reset skip counter */ 1258 *ps_ent_ctxt->pi4_mb_skip_run = 0; 1259 1260 /* is intra ? */ 1261 if (mb_type == I16x16) 1262 { 1263 UWORD32 u4_cbp_l, u4_cbp_c; 1264 1265 is_inter = 0; 1266 1267 u4_cbp_c = (cbp >> 4); 1268 u4_cbp_l = (cbp & 0xF); 1269 luma_intra_mode = (mb_tpm >> 4) & 3; 1270 chroma_intra_mode = (mb_tpm >> 6); 1271 1272 mb_type_stream = luma_intra_mode + 1 + (u4_cbp_c << 2) + (u4_cbp_l == 15) * 12; 1273 1274 mb_type_stream += 5; 1275 1276 /* write mb type */ 1277 PUT_BITS_UEV(ps_bitstream, mb_type_stream, error_status, "mb type"); 1278 1279 /* intra_chroma_pred_mode */ 1280 PUT_BITS_UEV(ps_bitstream, chroma_intra_mode, error_status, "intra_chroma_pred_mode"); 1281 } 1282 else if (mb_type == I4x4) 1283 { 1284 /* mb sub blk modes */ 1285 WORD32 intra_pred_mode_flag, rem_intra_mode; 1286 WORD32 byte; 1287 1288 is_inter = 0; 1289 1290 chroma_intra_mode = (mb_tpm >> 6); 1291 cbptable = 0; 1292 1293 /* write mb type */ 1294 PUT_BITS_UEV(ps_bitstream, 5, error_status, "mb type"); 1295 1296 for (i = 0; i < 16; i += 2) 1297 { 1298 /* sub blk idx 1 */ 1299 byte = *pu1_byte++; 1300 1301 intra_pred_mode_flag = byte & 0x1; 1302 1303 /* prev_intra4x4_pred_mode_flag */ 1304 PUT_BITS(ps_bitstream, intra_pred_mode_flag, 1, error_status, "prev_intra4x4_pred_mode_flag"); 1305 1306 /* rem_intra4x4_pred_mode */ 1307 if (!intra_pred_mode_flag) 1308 { 1309 rem_intra_mode = (byte & 0xF) >> 1; 1310 PUT_BITS(ps_bitstream, rem_intra_mode, 3, error_status, "rem_intra4x4_pred_mode"); 1311 } 1312 1313 /* sub blk idx 2 */ 1314 byte >>= 4; 1315 1316 intra_pred_mode_flag = byte & 0x1; 1317 1318 /* prev_intra4x4_pred_mode_flag */ 1319 PUT_BITS(ps_bitstream, intra_pred_mode_flag, 1, error_status, "prev_intra4x4_pred_mode_flag"); 1320 1321 /* rem_intra4x4_pred_mode */ 1322 if (!intra_pred_mode_flag) 1323 { 1324 rem_intra_mode = (byte & 0xF) >> 1; 1325 PUT_BITS(ps_bitstream, rem_intra_mode, 3, error_status, "rem_intra4x4_pred_mode"); 1326 } 1327 } 1328 1329 /* intra_chroma_pred_mode */ 1330 PUT_BITS_UEV(ps_bitstream, chroma_intra_mode, error_status, "intra_chroma_pred_mode"); 1331 } 1332 else if (mb_type == I8x8) 1333 { 1334 /* transform 8x8 flag */ 1335 UWORD32 u4_transform_size_8x8_flag = ps_ent_ctxt->i1_transform_8x8_mode_flag; 1336 1337 /* mb sub blk modes */ 1338 WORD32 intra_pred_mode_flag, rem_intra_mode; 1339 WORD32 byte; 1340 1341 is_inter = 0; 1342 1343 chroma_intra_mode = (mb_tpm >> 6); 1344 cbptable = 0; 1345 1346 ASSERT(0); 1347 1348 /* write mb type */ 1349 PUT_BITS_UEV(ps_bitstream, 5, error_status, "mb type"); 1350 1351 /* u4_transform_size_8x8_flag */ 1352 PUT_BITS(ps_bitstream, u4_transform_size_8x8_flag, 1, error_status, "u4_transform_size_8x8_flag"); 1353 1354 /* write sub block modes */ 1355 for (i = 0; i < 4; i++) 1356 { 1357 /* sub blk idx 1 */ 1358 byte = *pu1_byte++; 1359 1360 intra_pred_mode_flag = byte & 0x1; 1361 1362 /* prev_intra4x4_pred_mode_flag */ 1363 PUT_BITS(ps_bitstream, intra_pred_mode_flag, 1, error_status, "prev_intra4x4_pred_mode_flag"); 1364 1365 /* rem_intra4x4_pred_mode */ 1366 if (!intra_pred_mode_flag) 1367 { 1368 rem_intra_mode = (byte & 0xF) >> 1; 1369 PUT_BITS(ps_bitstream, rem_intra_mode, 3, error_status, "rem_intra4x4_pred_mode"); 1370 } 1371 1372 /* sub blk idx 2 */ 1373 byte >>= 4; 1374 1375 intra_pred_mode_flag = byte & 0x1; 1376 1377 /* prev_intra4x4_pred_mode_flag */ 1378 PUT_BITS(ps_bitstream, intra_pred_mode_flag, 1, error_status, "prev_intra4x4_pred_mode_flag"); 1379 1380 /* rem_intra4x4_pred_mode */ 1381 if (!intra_pred_mode_flag) 1382 { 1383 rem_intra_mode = (byte & 0xF) >> 1; 1384 PUT_BITS(ps_bitstream, rem_intra_mode, 3, error_status, "rem_intra4x4_pred_mode"); 1385 } 1386 } 1387 1388 /* intra_chroma_pred_mode */ 1389 PUT_BITS_UEV(ps_bitstream, chroma_intra_mode, error_status, "intra_chroma_pred_mode"); 1390 } 1391 else 1392 { 1393 /* inter macro block partition cnt */ 1394 const UWORD8 au1_part_cnt[] = { 1, 2, 2, 4 }; 1395 1396 /* mv ptr */ 1397 WORD16 *pi2_mv_ptr = (WORD16 *)pu1_byte; 1398 1399 /* number of partitions for the current mb */ 1400 UWORD32 u4_part_cnt = au1_part_cnt[mb_type - 3]; 1401 1402 is_inter = 1; 1403 1404 /* write mb type */ 1405 PUT_BITS_UEV(ps_bitstream, mb_type - 3, error_status, "mb type"); 1406 1407 for (i = 0; i < (WORD32)u4_part_cnt; i++) 1408 { 1409 PUT_BITS_SEV(ps_bitstream, *pi2_mv_ptr++, error_status, "mv x"); 1410 PUT_BITS_SEV(ps_bitstream, *pi2_mv_ptr++, error_status, "mv y"); 1411 } 1412 1413 pu1_byte = (UWORD8 *)pi2_mv_ptr; 1414 } 1415 1416 /* coded_block_pattern */ 1417 if (mb_type != I16x16) 1418 { 1419 PUT_BITS_UEV(ps_bitstream, gu1_cbp_map_tables[cbp][cbptable], error_status, "coded_block_pattern"); 1420 } 1421 1422 if (cbp || mb_type == I16x16) 1423 { 1424 /* mb_qp_delta */ 1425 PUT_BITS_SEV(ps_bitstream, mb_qp_delta, error_status, "mb_qp_delta"); 1426 } 1427 1428 /* Ending bitstream offset for header in bits */ 1429 bitstream_end_offset = GET_NUM_BITS(ps_bitstream); 1430 1431 ps_ent_ctxt->u4_header_bits[is_inter] += bitstream_end_offset - bitstream_start_offset; 1432 1433 /* start bitstream offset for residue in bits */ 1434 bitstream_start_offset = bitstream_end_offset; 1435 1436 /* residual */ 1437 error_status = ih264e_encode_residue(ps_ent_ctxt, mb_type, cbp); 1438 1439 /* Ending bitstream offset for residue in bits */ 1440 bitstream_end_offset = GET_NUM_BITS(ps_bitstream); 1441 1442 ps_ent_ctxt->u4_residue_bits[is_inter] += bitstream_end_offset - bitstream_start_offset; 1443 1444 /* store the index of the next mb syntax layer */ 1445 ps_ent_ctxt->pv_mb_header_data = pu1_byte; 1446 1447 return error_status; 1448 } 1449 1450 1451 /** 1452 ******************************************************************************* 1453 * 1454 * @brief 1455 * This function generates CAVLC coded bit stream for B slices 1456 * 1457 * @description 1458 * The mb syntax layer for inter slices constitutes luma mb mode, luma sub modes 1459 * (if present), mb qp delta, coded block pattern, chroma mb mode and 1460 * luma/chroma residue. These syntax elements are written as directed by table 1461 * 7.3.5 of h264 specification 1462 * 1463 * @param[in] ps_ent_ctxt 1464 * pointer to entropy context 1465 * 1466 * @returns error code 1467 * 1468 * @remarks none 1469 * 1470 ******************************************************************************* 1471 */ 1472 IH264E_ERROR_T ih264e_write_bslice_mb_cavlc(entropy_ctxt_t *ps_ent_ctxt) 1473 { 1474 /* error status */ 1475 IH264E_ERROR_T error_status = IH264E_SUCCESS; 1476 1477 /* bit stream ptr */ 1478 bitstrm_t *ps_bitstream = ps_ent_ctxt->ps_bitstrm; 1479 1480 /* packed header data */ 1481 UWORD8 *pu1_byte = ps_ent_ctxt->pv_mb_header_data; 1482 1483 /* mb header info */ 1484 /* 1485 * mb_tpm : mb type plus mode 1486 * mb_type : luma mb type and chroma mb type are packed 1487 * cbp : coded block pattern 1488 * mb_qp_delta : mb qp delta 1489 * chroma_intra_mode : chroma intra mode 1490 * luma_intra_mode : luma intra mode 1491 * ps_pu : Pointer to the array of structures having motion vectors, size 1492 * and position of sub partitions 1493 */ 1494 WORD32 mb_tpm, mb_type, cbp, chroma_intra_mode, luma_intra_mode; 1495 WORD8 mb_qp_delta; 1496 1497 /* temp var */ 1498 WORD32 i, mb_type_stream, cbptable = 1; 1499 1500 WORD32 is_inter = 0; 1501 1502 WORD32 bitstream_start_offset, bitstream_end_offset; 1503 1504 /* Starting bitstream offset for header in bits */ 1505 bitstream_start_offset = GET_NUM_BITS(ps_bitstream); 1506 1507 /********************************************************************/ 1508 /* BEGIN HEADER GENERATION */ 1509 /********************************************************************/ 1510 1511 mb_tpm = *pu1_byte++; 1512 1513 /* mb type */ 1514 mb_type = mb_tpm & 0xF; 1515 1516 /* check for skip */ 1517 if (mb_type == BSKIP) 1518 { 1519 UWORD32 *nnz; 1520 1521 is_inter = 1; 1522 1523 /* increment skip counter */ 1524 (*ps_ent_ctxt->pi4_mb_skip_run)++; 1525 1526 /* store the index of the next mb syntax layer */ 1527 ps_ent_ctxt->pv_mb_header_data = pu1_byte; 1528 1529 /* set nnz to zero */ 1530 ps_ent_ctxt->u4_left_nnz_luma = 0; 1531 nnz = (UWORD32 *)ps_ent_ctxt->pu1_top_nnz_luma[ps_ent_ctxt->i4_mb_x]; 1532 *nnz = 0; 1533 ps_ent_ctxt->u4_left_nnz_cbcr = 0; 1534 nnz = (UWORD32 *)ps_ent_ctxt->pu1_top_nnz_cbcr[ps_ent_ctxt->i4_mb_x]; 1535 *nnz = 0; 1536 1537 /* residual */ 1538 error_status = ih264e_encode_residue(ps_ent_ctxt, B16x16, 0); 1539 1540 bitstream_end_offset = GET_NUM_BITS(ps_bitstream); 1541 1542 ps_ent_ctxt->u4_header_bits[is_inter] += bitstream_end_offset 1543 - bitstream_start_offset; 1544 1545 return error_status; 1546 } 1547 1548 1549 /* remaining mb header info */ 1550 cbp = *pu1_byte++; 1551 mb_qp_delta = *pu1_byte++; 1552 1553 /* mb skip run */ 1554 PUT_BITS_UEV(ps_bitstream, *ps_ent_ctxt->pi4_mb_skip_run, error_status, "mb skip run"); 1555 1556 /* reset skip counter */ 1557 *ps_ent_ctxt->pi4_mb_skip_run = 0; 1558 1559 /* is intra ? */ 1560 if (mb_type == I16x16) 1561 { 1562 UWORD32 u4_cbp_l, u4_cbp_c; 1563 1564 is_inter = 0; 1565 1566 u4_cbp_c = (cbp >> 4); 1567 u4_cbp_l = (cbp & 0xF); 1568 luma_intra_mode = (mb_tpm >> 4) & 3; 1569 chroma_intra_mode = (mb_tpm >> 6); 1570 1571 mb_type_stream = luma_intra_mode + 1 + (u4_cbp_c << 2) + (u4_cbp_l == 15) * 12; 1572 1573 mb_type_stream += 23; 1574 1575 /* write mb type */ 1576 PUT_BITS_UEV(ps_bitstream, mb_type_stream, error_status, "mb type"); 1577 1578 /* intra_chroma_pred_mode */ 1579 PUT_BITS_UEV(ps_bitstream, chroma_intra_mode, error_status, "intra_chroma_pred_mode"); 1580 } 1581 else if (mb_type == I4x4) 1582 { 1583 /* mb sub blk modes */ 1584 WORD32 intra_pred_mode_flag, rem_intra_mode; 1585 WORD32 byte; 1586 1587 is_inter = 0; 1588 1589 chroma_intra_mode = (mb_tpm >> 6); 1590 cbptable = 0; 1591 1592 /* write mb type */ 1593 PUT_BITS_UEV(ps_bitstream, 23, error_status, "mb type"); 1594 1595 for (i = 0; i < 16; i += 2) 1596 { 1597 /* sub blk idx 1 */ 1598 byte = *pu1_byte++; 1599 1600 intra_pred_mode_flag = byte & 0x1; 1601 1602 /* prev_intra4x4_pred_mode_flag */ 1603 PUT_BITS(ps_bitstream, intra_pred_mode_flag, 1, error_status, "prev_intra4x4_pred_mode_flag"); 1604 1605 /* rem_intra4x4_pred_mode */ 1606 if (!intra_pred_mode_flag) 1607 { 1608 rem_intra_mode = (byte & 0xF) >> 1; 1609 PUT_BITS(ps_bitstream, rem_intra_mode, 3, error_status, "rem_intra4x4_pred_mode"); 1610 } 1611 1612 /* sub blk idx 2 */ 1613 byte >>= 4; 1614 1615 intra_pred_mode_flag = byte & 0x1; 1616 1617 /* prev_intra4x4_pred_mode_flag */ 1618 PUT_BITS(ps_bitstream, intra_pred_mode_flag, 1, error_status, "prev_intra4x4_pred_mode_flag"); 1619 1620 /* rem_intra4x4_pred_mode */ 1621 if (!intra_pred_mode_flag) 1622 { 1623 rem_intra_mode = (byte & 0xF) >> 1; 1624 PUT_BITS(ps_bitstream, rem_intra_mode, 3, error_status, "rem_intra4x4_pred_mode"); 1625 } 1626 } 1627 1628 /* intra_chroma_pred_mode */ 1629 PUT_BITS_UEV(ps_bitstream, chroma_intra_mode, error_status, "intra_chroma_pred_mode"); 1630 } 1631 else if (mb_type == I8x8) 1632 { 1633 /* transform 8x8 flag */ 1634 UWORD32 u4_transform_size_8x8_flag = ps_ent_ctxt->i1_transform_8x8_mode_flag; 1635 1636 /* mb sub blk modes */ 1637 WORD32 intra_pred_mode_flag, rem_intra_mode; 1638 WORD32 byte; 1639 1640 is_inter = 0; 1641 1642 chroma_intra_mode = (mb_tpm >> 6); 1643 cbptable = 0; 1644 1645 ASSERT(0); 1646 1647 /* write mb type */ 1648 PUT_BITS_UEV(ps_bitstream, 23, error_status, "mb type"); 1649 1650 /* u4_transform_size_8x8_flag */ 1651 PUT_BITS(ps_bitstream, u4_transform_size_8x8_flag, 1, error_status, "u4_transform_size_8x8_flag"); 1652 1653 /* write sub block modes */ 1654 for (i = 0; i < 4; i++) 1655 { 1656 /* sub blk idx 1 */ 1657 byte = *pu1_byte++; 1658 1659 intra_pred_mode_flag = byte & 0x1; 1660 1661 /* prev_intra4x4_pred_mode_flag */ 1662 PUT_BITS(ps_bitstream, intra_pred_mode_flag, 1, error_status, "prev_intra4x4_pred_mode_flag"); 1663 1664 /* rem_intra4x4_pred_mode */ 1665 if (!intra_pred_mode_flag) 1666 { 1667 rem_intra_mode = (byte & 0xF) >> 1; 1668 PUT_BITS(ps_bitstream, rem_intra_mode, 3, error_status, "rem_intra4x4_pred_mode"); 1669 } 1670 1671 /* sub blk idx 2 */ 1672 byte >>= 4; 1673 1674 intra_pred_mode_flag = byte & 0x1; 1675 1676 /* prev_intra4x4_pred_mode_flag */ 1677 PUT_BITS(ps_bitstream, intra_pred_mode_flag, 1, error_status, "prev_intra4x4_pred_mode_flag"); 1678 1679 /* rem_intra4x4_pred_mode */ 1680 if (!intra_pred_mode_flag) 1681 { 1682 rem_intra_mode = (byte & 0xF) >> 1; 1683 PUT_BITS(ps_bitstream, rem_intra_mode, 3, error_status, "rem_intra4x4_pred_mode"); 1684 } 1685 } 1686 1687 /* intra_chroma_pred_mode */ 1688 PUT_BITS_UEV(ps_bitstream, chroma_intra_mode, error_status, "intra_chroma_pred_mode"); 1689 } 1690 else if(mb_type == BDIRECT) 1691 { 1692 is_inter = 1; 1693 /* write mb type */ 1694 PUT_BITS_UEV(ps_bitstream, B_DIRECT_16x16, error_status, "mb type"); 1695 } 1696 else /* if mb_type == B16x16 */ 1697 { 1698 /* inter macro block partition cnt for 16x16 16x8 8x16 8x8 */ 1699 const UWORD8 au1_part_cnt[] = { 1, 2, 2, 4 }; 1700 1701 /* mv ptr */ 1702 WORD16 *pi2_mvd_ptr = (WORD16 *)pu1_byte; 1703 1704 /* number of partitions for the current mb */ 1705 UWORD32 u4_part_cnt = au1_part_cnt[mb_type - B16x16]; 1706 1707 /* Get the pred modes */ 1708 WORD32 i4_mb_part_pred_mode = (mb_tpm >> 4); 1709 1710 is_inter = 1; 1711 1712 mb_type_stream = mb_type - B16x16 + B_L0_16x16 + i4_mb_part_pred_mode; 1713 1714 /* write mb type */ 1715 PUT_BITS_UEV(ps_bitstream, mb_type_stream, error_status, "mb type"); 1716 1717 for (i = 0; i < (WORD32)u4_part_cnt; i++) 1718 { 1719 if (i4_mb_part_pred_mode != PRED_L1)/* || PRED_BI */ 1720 { 1721 PUT_BITS_SEV(ps_bitstream, *pi2_mvd_ptr, error_status, "mv l0 x"); 1722 pi2_mvd_ptr++; 1723 PUT_BITS_SEV(ps_bitstream, *pi2_mvd_ptr, error_status, "mv l0 y"); 1724 pi2_mvd_ptr++; 1725 } 1726 if (i4_mb_part_pred_mode != PRED_L0)/* || PRED_BI */ 1727 { 1728 PUT_BITS_SEV(ps_bitstream, *pi2_mvd_ptr, error_status, "mv l1 x"); 1729 pi2_mvd_ptr++; 1730 PUT_BITS_SEV(ps_bitstream, *pi2_mvd_ptr, error_status, "mv l1 y"); 1731 pi2_mvd_ptr++; 1732 } 1733 } 1734 1735 pu1_byte = (UWORD8 *)pi2_mvd_ptr; 1736 } 1737 1738 /* coded_block_pattern */ 1739 if (mb_type != I16x16) 1740 { 1741 PUT_BITS_UEV(ps_bitstream, gu1_cbp_map_tables[cbp][cbptable], error_status, "coded_block_pattern"); 1742 } 1743 1744 if (cbp || mb_type == I16x16) 1745 { 1746 /* mb_qp_delta */ 1747 PUT_BITS_SEV(ps_bitstream, mb_qp_delta, error_status, "mb_qp_delta"); 1748 } 1749 1750 /* Ending bitstream offset for header in bits */ 1751 bitstream_end_offset = GET_NUM_BITS(ps_bitstream); 1752 1753 ps_ent_ctxt->u4_header_bits[is_inter] += bitstream_end_offset - bitstream_start_offset; 1754 1755 /* start bitstream offset for residue in bits */ 1756 bitstream_start_offset = bitstream_end_offset; 1757 1758 /* residual */ 1759 error_status = ih264e_encode_residue(ps_ent_ctxt, mb_type, cbp); 1760 1761 /* Ending bitstream offset for residue in bits */ 1762 bitstream_end_offset = GET_NUM_BITS(ps_bitstream); 1763 1764 ps_ent_ctxt->u4_residue_bits[is_inter] += bitstream_end_offset - bitstream_start_offset; 1765 1766 /* store the index of the next mb syntax layer */ 1767 ps_ent_ctxt->pv_mb_header_data = pu1_byte; 1768 1769 return error_status; 1770 } 1771
