Hamsalekha S | 8d3d303 | 2015-03-13 21:24:58 +0530 | [diff] [blame] | 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() |
Harinarayanan K K | 134291e | 2015-06-18 16:03:38 +0530 | [diff] [blame] | 38 | * - ih264e_write_islice_mb_cavlc() |
| 39 | * - ih264e_write_pslice_mb_cavlc() |
Hamsalekha S | 8d3d303 | 2015-03-13 21:24:58 +0530 | [diff] [blame] | 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" |
Harish Mahendrakar | c72323e | 2015-04-28 19:07:40 +0530 | [diff] [blame] | 62 | #include "ih264_macros.h" |
Hamsalekha S | 8d3d303 | 2015-03-13 21:24:58 +0530 | [diff] [blame] | 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" |
Harinarayanan K K | 134291e | 2015-06-18 16:03:38 +0530 | [diff] [blame] | 68 | #include "ime_defs.h" |
Hamsalekha S | 8d3d303 | 2015-03-13 21:24:58 +0530 | [diff] [blame] | 69 | #include "ime_structs.h" |
Hamsalekha S | 8d3d303 | 2015-03-13 21:24:58 +0530 | [diff] [blame] | 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" |
Harinarayanan K K | 134291e | 2015-06-18 16:03:38 +0530 | [diff] [blame] | 78 | #include "ih264_cabac_tables.h" |
Hamsalekha S | 8d3d303 | 2015-03-13 21:24:58 +0530 | [diff] [blame] | 79 | #include "irc_cntrl_param.h" |
| 80 | #include "irc_frame_info_collector.h" |
| 81 | #include "ih264e_rate_control.h" |
Harinarayanan K K | 134291e | 2015-06-18 16:03:38 +0530 | [diff] [blame] | 82 | #include "ih264e_cabac_structs.h" |
Hamsalekha S | 8d3d303 | 2015-03-13 21:24:58 +0530 | [diff] [blame] | 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; |
Harinarayanan K K | 134291e | 2015-06-18 16:03:38 +0530 | [diff] [blame] | 717 | UWORD16 au2_sig_coeff_map[4] = {0}; |
| 718 | WORD16 *pi2_res_block[4] = {NULL}; |
Hamsalekha S | 8d3d303 | 2015-03-13 21:24:58 +0530 | [diff] [blame] | 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 | |
Hamsalekha S | 8d3d303 | 2015-03-13 21:24:58 +0530 | [diff] [blame] | 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 | */ |
Harinarayanan K K | 134291e | 2015-06-18 16:03:38 +0530 | [diff] [blame] | 952 | IH264E_ERROR_T ih264e_write_islice_mb_cavlc(entropy_ctxt_t *ps_ent_ctxt) |
Hamsalekha S | 8d3d303 | 2015-03-13 21:24:58 +0530 | [diff] [blame] | 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 | */ |
Harinarayanan K K | 134291e | 2015-06-18 16:03:38 +0530 | [diff] [blame] | 1174 | IH264E_ERROR_T ih264e_write_pslice_mb_cavlc(entropy_ctxt_t *ps_ent_ctxt) |
Hamsalekha S | 8d3d303 | 2015-03-13 21:24:58 +0530 | [diff] [blame] | 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"); |
Hamsalekha S | 8d3d303 | 2015-03-13 21:24:58 +0530 | [diff] [blame] | 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 | |
Harinarayanan K K | 134291e | 2015-06-18 16:03:38 +0530 | [diff] [blame] | 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 | { |
Martin Storsjo | a77fc52 | 2015-07-02 10:48:05 +0300 | [diff] [blame] | 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++; |
Harinarayanan K K | 134291e | 2015-06-18 16:03:38 +0530 | [diff] [blame] | 1725 | } |
| 1726 | if (i4_mb_part_pred_mode != PRED_L0)/* || PRED_BI */ |
| 1727 | { |
Martin Storsjo | a77fc52 | 2015-07-02 10:48:05 +0300 | [diff] [blame] | 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++; |
Harinarayanan K K | 134291e | 2015-06-18 16:03:38 +0530 | [diff] [blame] | 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 | } |
Hamsalekha S | 8d3d303 | 2015-03-13 21:24:58 +0530 | [diff] [blame] | 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 | } |