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_core_coding.h |
| 25 | * |
| 26 | * @brief |
| 27 | * This file contains extern declarations of core coding routines |
| 28 | * |
| 29 | * @author |
| 30 | * ittiam |
| 31 | * |
| 32 | * @remarks |
| 33 | * none |
| 34 | ****************************************************************************** |
| 35 | */ |
| 36 | |
| 37 | #ifndef IH264E_CORE_CODING_H_ |
| 38 | #define IH264E_CORE_CODING_H_ |
| 39 | |
| 40 | /*****************************************************************************/ |
| 41 | /* Constant Macros */ |
| 42 | /*****************************************************************************/ |
| 43 | |
| 44 | /** |
| 45 | ****************************************************************************** |
| 46 | * @brief Enable/Disable Hadamard transform of DC Coeff's |
| 47 | ****************************************************************************** |
| 48 | */ |
| 49 | #define DISABLE_DC_TRANSFORM 0 |
| 50 | #define ENABLE_DC_TRANSFORM 1 |
| 51 | |
| 52 | /** |
| 53 | ******************************************************************************* |
| 54 | * @brief bit masks for DC and AC control flags |
| 55 | ******************************************************************************* |
| 56 | */ |
| 57 | |
| 58 | #define DC_COEFF_CNT_LUMA_MB 16 |
| 59 | #define NUM_4X4_BLKS_LUMA_MB_ROW 4 |
| 60 | #define NUM_LUMA4x4_BLOCKS_IN_MB 16 |
| 61 | #define NUM_CHROMA4x4_BLOCKS_IN_MB 8 |
| 62 | |
| 63 | #define SIZE_4X4_BLK_HRZ TRANS_SIZE_4 |
| 64 | #define SIZE_4X4_BLK_VERT TRANS_SIZE_4 |
| 65 | |
| 66 | #define CNTRL_FLAG_DC_MASK_LUMA 0x0000FFFF |
| 67 | #define CNTRL_FLAG_AC_MASK_LUMA 0xFFFF0000 |
| 68 | |
| 69 | #define CNTRL_FLAG_AC_MASK_CHROMA_U 0xF0000000 |
| 70 | #define CNTRL_FLAG_DC_MASK_CHROMA_U 0x0000F000 |
| 71 | |
| 72 | #define CNTRL_FLAG_AC_MASK_CHROMA_V 0x0F000000 |
| 73 | #define CNTRL_FLAG_DC_MASK_CHROMA_V 0x00000F00 |
| 74 | |
| 75 | #define CNTRL_FLAG_AC_MASK_CHROMA ( CNTRL_FLAG_AC_MASK_CHROMA_U | CNTRL_FLAG_AC_MASK_CHROMA_V ) |
| 76 | #define CNTRL_FLAG_DC_MASK_CHROMA ( CNTRL_FLAG_DC_MASK_CHROMA_U | CNTRL_FLAG_DC_MASK_CHROMA_V ) |
| 77 | |
| 78 | #define CNTRL_FLAG_DCBLK_MASK_CHROMA 0x0000C000 |
| 79 | |
| 80 | /** |
| 81 | ******************************************************************************* |
| 82 | * @brief macros for transforms |
| 83 | ******************************************************************************* |
| 84 | */ |
| 85 | #define DEQUEUE_BLKID_FROM_CONTROL( u4_cntrl, blk_lin_id) \ |
| 86 | { \ |
| 87 | blk_lin_id = CLZ(u4_cntrl); \ |
| 88 | u4_cntrl &= (0x7FFFFFFF >> blk_lin_id); \ |
| 89 | }; |
| 90 | |
| 91 | #define IND2SUB_LUMA_MB(u4_blk_id,i4_offset_x,i4_offset_y) \ |
| 92 | { \ |
| 93 | i4_offset_x = (u4_blk_id % 4) << 2; \ |
| 94 | i4_offset_y = (u4_blk_id / 4) << 2; \ |
| 95 | } |
| 96 | |
| 97 | #define IND2SUB_CHROMA_MB(u4_blk_id,i4_offset_x,i4_offset_y) \ |
| 98 | { \ |
| 99 | i4_offset_x = ((u4_blk_id & 0x1 ) << 3) + (u4_blk_id > 3); \ |
| 100 | i4_offset_y = (u4_blk_id & 0x2) << 1; \ |
| 101 | } |
| 102 | |
| 103 | |
| 104 | /*****************************************************************************/ |
| 105 | /* Function Declarations */ |
| 106 | /*****************************************************************************/ |
| 107 | |
| 108 | /** |
| 109 | ******************************************************************************* |
| 110 | * |
| 111 | * @brief |
| 112 | * This function performs does the DCT transform then Hadamard transform |
| 113 | * and quantization for a macroblock when the mb mode is intra 16x16 mode |
| 114 | * |
| 115 | * @par Description: |
| 116 | * First cf4 is done on all 16 4x4 blocks of the 16x16 input block. |
| 117 | * Then hadamard transform is done on the DC coefficients |
| 118 | * Quantization is then performed on the 16x16 block, 4x4 wise |
| 119 | * |
| 120 | * @param[in] pu1_src |
| 121 | * Pointer to source sub-block |
| 122 | * |
| 123 | * @param[in] pu1_pred |
| 124 | * Pointer to prediction sub-block |
| 125 | * |
| 126 | * @param[in] pi2_out |
| 127 | * Pointer to residual sub-block |
| 128 | * The output will be in linear format |
| 129 | * The first 16 continuous locations will contain the values of Dc block |
| 130 | * After DC block and a stride 1st AC block will follow |
| 131 | * After one more stride next AC block will follow |
| 132 | * The blocks will be in raster scan order |
| 133 | * |
| 134 | * @param[in] src_strd |
| 135 | * Source stride |
| 136 | * |
| 137 | * @param[in] pred_strd |
| 138 | * Prediction stride |
| 139 | * |
| 140 | * @param[in] dst_strd |
| 141 | * Destination stride |
| 142 | * |
| 143 | * @param[in] pu2_scale_matrix |
| 144 | * The quantization matrix for 4x4 transform |
| 145 | * |
| 146 | * @param[in] pu2_threshold_matrix |
| 147 | * Threshold matrix |
| 148 | * |
| 149 | * @param[in] u4_qbits |
| 150 | * 15+QP/6 |
| 151 | * |
| 152 | * @param[in] u4_round_factor |
| 153 | * Round factor for quant |
| 154 | * |
| 155 | * @param[out] pu1_nnz |
| 156 | * Memory to store the non-zeros after transform |
| 157 | * The first byte will be the nnz of DC block |
| 158 | * From the next byte the AC nnzs will be stored in raster scan order |
| 159 | * |
| 160 | * @param u4_dc_flag |
| 161 | * Signals if Dc transform is to be done or not |
| 162 | * 1 -> Dc transform will be done |
| 163 | * 0 -> Dc transform will not be done |
| 164 | * |
| 165 | * @remarks |
| 166 | * |
| 167 | ******************************************************************************* |
| 168 | */ |
| 169 | void ih264e_luma_16x16_resi_trans_dctrans_quant( |
| 170 | codec_t *ps_codec, UWORD8 *pu1_src, UWORD8 *pu1_pred, |
| 171 | WORD16 *pi2_out, WORD32 src_strd, WORD32 pred_strd, |
| 172 | WORD32 dst_strd, const UWORD16 *pu2_scale_matrix, |
| 173 | const UWORD16 *pu2_threshold_matrix, UWORD32 u4_qbits, |
| 174 | UWORD32 u4_round_factor, UWORD8 *pu1_nnz, UWORD32 u4_dc_flag); |
| 175 | |
| 176 | /** |
| 177 | ******************************************************************************* |
| 178 | * |
| 179 | * @brief |
| 180 | * This function performs the intra 16x16 inverse transform process for H264 |
| 181 | * it includes inverse Dc transform, inverse quant and then inverse transform |
| 182 | * |
| 183 | * @par Description: |
| 184 | * |
| 185 | * @param[in] pi2_src |
| 186 | * Input data, 16x16 size |
| 187 | * First 16 mem locations will have the Dc coffs in rater scan order in linear fashion |
| 188 | * after a stride 1st AC clock will be present again in raster can order |
| 189 | * Then each AC block of the 16x16 block will follow in raster scan order |
| 190 | * |
| 191 | * @param[in] pu1_pred |
| 192 | * The predicted data, 16x16 size |
| 193 | * Block by block form |
| 194 | * |
| 195 | * @param[in] pu1_out |
| 196 | * Output 16x16 |
| 197 | * In block by block form |
| 198 | * |
| 199 | * @param[in] src_strd |
| 200 | * Source stride |
| 201 | * |
| 202 | * @param[in] pred_strd |
| 203 | * input stride for prediction buffer |
| 204 | * |
| 205 | * @param[in] out_strd |
| 206 | * input stride for output buffer |
| 207 | * |
| 208 | * @param[in] pu2_iscale_mat |
| 209 | * Inverse quantization matrix for 4x4 transform |
| 210 | * |
| 211 | * @param[in] pu2_weigh_mat |
| 212 | * weight matrix of 4x4 transform |
| 213 | * |
| 214 | * @param[in] qp_div |
| 215 | * QP/6 |
| 216 | * |
| 217 | * @param[in] pi4_tmp |
| 218 | * Input temporary buffer |
| 219 | * needs to be at least 20 in size |
| 220 | * |
| 221 | * @param[in] pu4_cntrl |
| 222 | * Controls the transform path |
| 223 | * total Last 17 bits are used |
| 224 | * the 16th th bit will correspond to DC block |
| 225 | * and 32-17 will correspond to the ac blocks in raster scan order |
| 226 | * bit equaling zero indicates that the entire 4x4 block is zero for DC |
| 227 | * For AC blocks a bit equaling zero will mean that all 15 AC coffs of the block is nonzero |
| 228 | * |
| 229 | * @param[in] pi4_tmp |
| 230 | * Input temporary buffer |
| 231 | * needs to be at least COFF_CNT_SUB_BLK_4x4+COFF_CNT_SUB_BLK_4x4 size |
| 232 | * |
| 233 | * @returns |
| 234 | * none |
| 235 | * |
| 236 | * @remarks |
| 237 | * The all zero case must be taken care outside |
| 238 | * |
| 239 | ******************************************************************************* |
| 240 | */ |
| 241 | void ih264e_luma_16x16_idctrans_iquant_itrans_recon( |
| 242 | codec_t *ps_codec, WORD16 *pi2_src, UWORD8 *pu1_pred, |
| 243 | UWORD8 *pu1_out, WORD32 src_strd, WORD32 pred_strd, |
| 244 | WORD32 out_strd, const UWORD16 *pu2_iscale_mat, |
| 245 | const UWORD16 *pu2_weigh_mat, UWORD32 qp_div, UWORD32 u4_cntrl, |
| 246 | UWORD32 u4_dc_trans_flag, WORD32 *pi4_tmp); |
| 247 | |
| 248 | /** |
| 249 | ******************************************************************************* |
| 250 | * |
| 251 | * @brief |
| 252 | * This function performs does the DCT transform then Hadamard transform |
| 253 | * and quantization for a chroma macroblock |
| 254 | * |
| 255 | * @par Description: |
| 256 | * First cf4 is done on all 16 4x4 blocks of the 8x8input block |
| 257 | * Then hadamard transform is done on the DC coefficients |
| 258 | * Quantization is then performed on the 8x8 block, 4x4 wise |
| 259 | * |
| 260 | * @param[in] pu1_src |
| 261 | * Pointer to source sub-block |
| 262 | * The input is in interleaved format for two chroma planes |
| 263 | * |
| 264 | * @param[in] pu1_pred |
| 265 | * Pointer to prediction sub-block |
| 266 | * Prediction is in inter leaved format |
| 267 | * |
| 268 | * @param[in] pi2_out |
| 269 | * Pointer to residual sub-block |
| 270 | * The output will be in linear format |
| 271 | * The first 4 continuous locations will contain the values of DC block for U |
| 272 | * and then next 4 will contain for V. |
| 273 | * After DC block and a stride 1st AC block of U plane will follow |
| 274 | * After one more stride next AC block of V plane will follow |
| 275 | * The blocks will be in raster scan order |
| 276 | * |
| 277 | * After all the AC blocks of U plane AC blocks of V plane will follow in exact |
| 278 | * same way |
| 279 | * |
| 280 | * @param[in] src_strd |
| 281 | * Source stride |
| 282 | * |
| 283 | * @param[in] pred_strd |
| 284 | * Prediction stride |
| 285 | * |
| 286 | * @param[in] dst_strd |
| 287 | * Destination stride |
| 288 | * |
| 289 | * @param[in] pu2_scale_matrix |
| 290 | * The quantization matrix for 4x4 transform |
| 291 | * |
| 292 | * @param[in] pu2_threshold_matrix |
| 293 | * Threshold matrix |
| 294 | * |
| 295 | * @param[in] u4_qbits |
| 296 | * 15+QP/6 |
| 297 | * |
| 298 | * @param[in] u4_round_factor |
| 299 | * Round factor for quant |
| 300 | * |
| 301 | * @param[out] pu1_nnz |
| 302 | * Memory to store the non-zeros after transform |
| 303 | * The first byte will be the nnz od DC block for U plane |
| 304 | * From the next byte the AC nnzs will be storerd in raster scan order |
| 305 | * The fifth byte will be nnz of Dc block of V plane |
| 306 | * Then Ac blocks will follow |
| 307 | * |
| 308 | * @param u4_dc_flag |
| 309 | * Signals if Dc transform is to be done or not |
| 310 | * 1 -> Dc transform will be done |
| 311 | * 0 -> Dc transform will not be done |
| 312 | * |
| 313 | * @remarks |
| 314 | * |
| 315 | ******************************************************************************* |
| 316 | */ |
| 317 | void ih264e_chroma_8x8_resi_trans_dctrans_quant( |
| 318 | codec_t *ps_codec, UWORD8 *pu1_src, UWORD8 *pu1_pred, |
| 319 | WORD16 *pi2_out, WORD32 src_strd, WORD32 pred_strd, |
| 320 | WORD32 out_strd, const UWORD16 *pu2_scale_matrix, |
| 321 | const UWORD16 *pu2_threshold_matrix, UWORD32 u4_qbits, |
| 322 | UWORD32 u4_round_factor, UWORD8 *pu1_nnz_c); |
| 323 | |
| 324 | /** |
| 325 | ******************************************************************************* |
| 326 | * @brief |
| 327 | * This function performs the inverse transform with process for chroma MB of H264 |
| 328 | * |
| 329 | * @par Description: |
| 330 | * Does inverse DC transform ,inverse quantization inverse transform |
| 331 | * |
| 332 | * @param[in] pi2_src |
| 333 | * Input data, 16x16 size |
| 334 | * The input is in the form of, first 4 locations will contain DC coeffs of |
| 335 | * U plane, next 4 will contain DC coeffs of V plane, then AC blocks of U plane |
| 336 | * in raster scan order will follow, each block as linear array in raster scan order. |
| 337 | * After a stride next AC block will follow. After all AC blocks of U plane |
| 338 | * V plane AC blocks will follow in exact same order. |
| 339 | * |
| 340 | * @param[in] pu1_pred |
| 341 | * The predicted data, 8x16 size, U and V interleaved |
| 342 | * |
| 343 | * @param[in] pu1_out |
| 344 | * Output 8x16, U and V interleaved |
| 345 | * |
| 346 | * @param[in] src_strd |
| 347 | * Source stride |
| 348 | * |
| 349 | * @param[in] pred_strd |
| 350 | * input stride for prediction buffer |
| 351 | * |
| 352 | * @param[in] out_strd |
| 353 | * input stride for output buffer |
| 354 | * |
| 355 | * @param[in] pu2_iscale_mat |
| 356 | * Inverse quantization martix for 4x4 transform |
| 357 | * |
| 358 | * @param[in] pu2_weigh_mat |
| 359 | * weight matrix of 4x4 transform |
| 360 | * |
| 361 | * @param[in] qp_div |
| 362 | * QP/6 |
| 363 | * |
| 364 | * @param[in] pi4_tmp |
| 365 | * Input temporary buffer |
| 366 | * needs to be at least COFF_CNT_SUB_BLK_4x4 + Number of Dc cofss for chroma * number of planes |
| 367 | * in size |
| 368 | * |
| 369 | * @param[in] pu4_cntrl |
| 370 | * Controls the transform path |
| 371 | * the 15 th bit will correspond to DC block of U plane , 14th will indicate the V plane Dc block |
| 372 | * 32-28 bits will indicate AC blocks of U plane in raster scan order |
| 373 | * 27-23 bits will indicate AC blocks of V plane in rater scan order |
| 374 | * The bit 1 implies that there is at least one non zero coff in a block |
| 375 | * |
| 376 | * @returns |
| 377 | * none |
| 378 | * |
| 379 | * @remarks |
| 380 | ******************************************************************************* |
| 381 | */ |
| 382 | void ih264e_chroma_8x8_idctrans_iquant_itrans_recon( |
| 383 | codec_t *ps_codec, WORD16 *pi2_src, UWORD8 *pu1_pred, |
| 384 | UWORD8 *pu1_out, WORD32 src_strd, WORD32 pred_strd, |
| 385 | WORD32 out_strd, const UWORD16 *pu2_iscale_mat, |
| 386 | const UWORD16 *pu2_weigh_mat, UWORD32 qp_div, UWORD32 u4_cntrl, |
| 387 | WORD32 *pi4_tmp); |
| 388 | |
| 389 | /** |
| 390 | ****************************************************************************** |
| 391 | * |
| 392 | * @brief This function packs residue of an i16x16 luma mb for entropy coding |
| 393 | * |
| 394 | * @par Description |
| 395 | * An i16 macro block contains two classes of units, dc 4x4 block and |
| 396 | * 4x4 ac blocks. while packing the mb, the dc block is sent first, and |
| 397 | * the 16 ac blocks are sent next in scan order. Each and every block is |
| 398 | * represented by 3 parameters (nnz, significant coefficient map and the |
| 399 | * residue coefficients itself). If a 4x4 unit does not have any coefficients |
| 400 | * then only nnz is sent. Inside a 4x4 block the individual coefficients are |
| 401 | * sent in scan order. |
| 402 | * |
| 403 | * The first byte of each block will be nnz of the block, if it is non zero, |
| 404 | * a 2 byte significance map is sent. This is followed by nonzero coefficients. |
| 405 | * This is repeated for 1 dc + 16 ac blocks. |
| 406 | * |
| 407 | * @param[in] pi2_res_mb |
| 408 | * pointer to residue mb |
| 409 | * |
| 410 | * @param[in, out] pv_mb_coeff_data |
| 411 | * buffer pointing to packed residue coefficients |
| 412 | * |
| 413 | * @param[in] u4_res_strd |
| 414 | * residual block stride |
| 415 | * |
| 416 | * @param[out] u1_cbp_l |
| 417 | * coded block pattern luma |
| 418 | * |
| 419 | * @param[in] pu1_nnz |
| 420 | * number of non zero coefficients in each 4x4 unit |
| 421 | * |
| 422 | * @param[out] |
| 423 | * Control signal for inverse transform of 16x16 blocks |
| 424 | * |
| 425 | * @return none |
| 426 | * |
| 427 | * @ remarks |
| 428 | * |
| 429 | ****************************************************************************** |
| 430 | */ |
| 431 | void ih264e_pack_l_mb_i16(WORD16 *pi2_res_mb, void **pv_mb_coeff_data, |
| 432 | WORD32 i4_res_strd, UWORD8 *u1_cbp_l, UWORD8 *pu1_nnz, |
| 433 | UWORD32 *pu4_cntrl); |
| 434 | |
| 435 | /** |
| 436 | ****************************************************************************** |
| 437 | * |
| 438 | * @brief This function packs residue of an i8x8 chroma mb for entropy coding |
| 439 | * |
| 440 | * @par Description |
| 441 | * An i8 chroma macro block contains two classes of units, dc 2x2 block and |
| 442 | * 4x4 ac blocks. while packing the mb, the dc block is sent first, and |
| 443 | * the 4 ac blocks are sent next in scan order. Each and every block is |
| 444 | * represented by 3 parameters (nnz, significant coefficient map and the |
| 445 | * residue coefficients itself). If a 4x4 unit does not have any coefficients |
| 446 | * then only nnz is sent. Inside a 4x4 block the individual coefficients are |
| 447 | * sent in scan order. |
| 448 | * |
| 449 | * The first byte of each block will be nnz of the block, if it is non zero, |
| 450 | * a 2 byte significance map is sent. This is followed by nonzero coefficients. |
| 451 | * This is repeated for 1 dc + 4 ac blocks. |
| 452 | * |
| 453 | * @param[in] pi2_res_mb |
| 454 | * pointer to residue mb |
| 455 | * |
| 456 | * @param[in, out] pv_mb_coeff_data |
| 457 | * buffer pointing to packed residue coefficients |
| 458 | * |
| 459 | * @param[in] u4_res_strd |
| 460 | * residual block stride |
| 461 | * |
| 462 | * @param[out] u1_cbp_c |
| 463 | * coded block pattern chroma |
| 464 | * |
| 465 | * @param[in] pu1_nnz |
| 466 | * number of non zero coefficients in each 4x4 unit |
| 467 | * |
| 468 | * @param[out] pu1_nnz |
| 469 | * Control signal for inverse transform |
| 470 | * |
| 471 | * @param[in] u4_swap_uv |
| 472 | * Swaps the order of U and V planes in entropy bitstream |
| 473 | * |
| 474 | * @return none |
| 475 | * |
| 476 | * @ remarks |
| 477 | * |
| 478 | ****************************************************************************** |
| 479 | */ |
| 480 | void ih264e_pack_c_mb(WORD16 *pi2_res_mb, void **pv_mb_coeff_data, |
| 481 | WORD32 i4_res_strd, UWORD8 *u1_cbp_c, UWORD8 *pu1_nnz, |
| 482 | UWORD32 u4_kill_coffs_flag, UWORD32 *pu4_cntrl, |
| 483 | UWORD32 u4_swap_uv); |
| 484 | |
| 485 | /** |
| 486 | ******************************************************************************* |
| 487 | * |
| 488 | * @brief performs luma core coding when intra mode is i16x16 |
| 489 | * |
| 490 | * @par Description: |
| 491 | * If the current mb is to be coded as intra of mb type i16x16, the mb is first |
| 492 | * predicted using one of i16x16 prediction filters, basing on the intra mode |
| 493 | * chosen. Then, error is computed between the input blk and the estimated blk. |
| 494 | * This error is transformed (hierarchical transform i.e., dct followed by hada- |
| 495 | * -mard), quantized. The quantized coefficients are packed in scan order for |
| 496 | * entropy coding. |
| 497 | * |
| 498 | * @param[in] ps_proc_ctxt |
| 499 | * pointer to the current macro block context |
| 500 | * |
| 501 | * @returns u1_cbp_l |
| 502 | * coded block pattern luma |
| 503 | * |
| 504 | * @remarks none |
| 505 | * |
| 506 | ******************************************************************************* |
| 507 | */ |
| 508 | UWORD8 ih264e_code_luma_intra_macroblock_16x16 |
| 509 | ( |
| 510 | process_ctxt_t *ps_proc |
| 511 | ); |
| 512 | |
| 513 | /** |
| 514 | ******************************************************************************* |
| 515 | * |
| 516 | * @brief performs luma core coding when intra mode is i4x4 |
| 517 | * |
| 518 | * @par Description: |
| 519 | * If the current mb is to be coded as intra of mb type i4x4, the mb is first |
| 520 | * predicted using one of i4x4 prediction filters, basing on the intra mode |
| 521 | * chosen. Then, error is computed between the input blk and the estimated blk. |
| 522 | * This error is dct transformed and quantized. The quantized coefficients are |
| 523 | * packed in scan order for entropy coding. |
| 524 | * |
| 525 | * @param[in] ps_proc_ctxt |
| 526 | * pointer to the current macro block context |
| 527 | * |
| 528 | * @returns u1_cbp_l |
| 529 | * coded block pattern luma |
| 530 | * |
| 531 | * @remarks |
| 532 | * The traversal of 4x4 subblocks in the 16x16 macroblock is as per the scan order |
| 533 | * mentioned in h.264 specification |
| 534 | * |
| 535 | ******************************************************************************* |
| 536 | */ |
| 537 | UWORD8 ih264e_code_luma_intra_macroblock_4x4 |
| 538 | ( |
| 539 | process_ctxt_t *ps_proc |
| 540 | ); |
| 541 | |
| 542 | /** |
| 543 | ******************************************************************************* |
| 544 | * |
| 545 | * @brief performs luma core coding when intra mode is i4x4 |
| 546 | * |
| 547 | * @par Description: |
| 548 | * If the current mb is to be coded as intra of mb type i4x4, the mb is first |
| 549 | * predicted using one of i4x4 prediction filters, basing on the intra mode |
| 550 | * chosen. Then, error is computed between the input blk and the estimated blk. |
| 551 | * This error is dct transformed and quantized. The quantized coefficients are |
| 552 | * packed in scan order for entropy coding. |
| 553 | * |
| 554 | * @param[in] ps_proc_ctxt |
| 555 | * pointer to the current macro block context |
| 556 | * |
| 557 | * @returns u1_cbp_l |
| 558 | * coded block pattern luma |
| 559 | * |
| 560 | * @remarks |
| 561 | * The traversal of 4x4 subblocks in the 16x16 macroblock is as per the scan order |
| 562 | * mentioned in h.264 specification |
| 563 | * |
| 564 | ******************************************************************************* |
| 565 | */ |
| 566 | UWORD8 ih264e_code_luma_intra_macroblock_4x4_rdopt_on |
| 567 | ( |
| 568 | process_ctxt_t *ps_proc |
| 569 | ); |
| 570 | |
| 571 | /** |
| 572 | ******************************************************************************* |
| 573 | * |
| 574 | * @brief performs chroma core coding for intra macro blocks |
| 575 | * |
| 576 | * @par Description: |
| 577 | * If the current MB is to be intra coded with mb type chroma I8x8, the MB is |
| 578 | * first predicted using intra 8x8 prediction filters. The predicted data is |
| 579 | * compared with the input for error and the error is transformed. The DC |
| 580 | * coefficients of each transformed sub blocks are further transformed using |
| 581 | * Hadamard transform. The resulting coefficients are quantized, packed and sent |
| 582 | * for entropy coding. |
| 583 | * |
| 584 | * @param[in] ps_proc_ctxt |
| 585 | * pointer to the current macro block context |
| 586 | * |
| 587 | * @returns u1_cbp_c |
| 588 | * coded block pattern chroma |
| 589 | * |
| 590 | * @remarks |
| 591 | * The traversal of 4x4 subblocks in the 8x8 macroblock is as per the scan order |
| 592 | * mentioned in h.264 specification |
| 593 | * |
| 594 | ******************************************************************************* |
| 595 | */ |
| 596 | UWORD8 ih264e_code_chroma_intra_macroblock_8x8 |
| 597 | ( |
| 598 | process_ctxt_t *ps_proc |
| 599 | ); |
| 600 | |
| 601 | /** |
| 602 | ******************************************************************************* |
| 603 | * @brief performs luma core coding when mode is inter |
| 604 | * |
| 605 | * @par Description: |
| 606 | * If the current mb is to be coded as inter predicted mb,based on the sub mb |
| 607 | * partitions and corresponding motion vectors generated by ME, prediction is done. |
| 608 | * Then, error is computed between the input blk and the estimated blk. |
| 609 | * This error is transformed ( dct and with out hadamard), quantized. The |
| 610 | * quantized coefficients are packed in scan order for entropy coding. |
| 611 | * |
| 612 | * @param[in] ps_proc_ctxt |
| 613 | * pointer to the current macro block context |
| 614 | * |
| 615 | * @returns u1_cbp_l |
| 616 | * coded block pattern luma |
| 617 | * |
| 618 | * @remarks none |
| 619 | * |
| 620 | ******************************************************************************* |
| 621 | */ |
| 622 | UWORD8 ih264e_code_luma_inter_macroblock_16x16 |
| 623 | ( |
| 624 | process_ctxt_t *ps_proc |
| 625 | ); |
| 626 | |
| 627 | /** |
| 628 | ******************************************************************************* |
| 629 | * @brief performs chroma core coding for inter macro blocks |
| 630 | * |
| 631 | * @par Description: |
| 632 | * If the current mb is to be coded as inter predicted mb, based on the sub mb |
| 633 | * partitions and corresponding motion vectors generated by ME, prediction is done. |
| 634 | * Then, error is computed between the input blk and the estimated blk. |
| 635 | * This error is transformed, quantized. The quantized coefficients |
| 636 | * are packed in scan order for entropy coding. |
| 637 | * |
| 638 | * @param[in] ps_proc_ctxt |
| 639 | * pointer to the current macro block context |
| 640 | * |
| 641 | * @returns u1_cbp_l |
| 642 | * coded block pattern luma |
| 643 | * |
| 644 | * @remarks none |
| 645 | * |
| 646 | ******************************************************************************* |
| 647 | */ |
| 648 | UWORD8 ih264e_code_chroma_inter_macroblock_8x8 |
| 649 | ( |
| 650 | process_ctxt_t *ps_proc |
| 651 | ); |
| 652 | |
| 653 | #endif /* IH264E_CORE_CODING_H_ */ |