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_intra_modes_eval.h |
| 25 | * |
| 26 | * @brief |
| 27 | * This file contains declarations of routines that perform rate distortion |
| 28 | * analysis on a macroblock if coded as intra. |
| 29 | * |
| 30 | * @author |
| 31 | * ittiam |
| 32 | * |
| 33 | * @remarks |
| 34 | * none |
| 35 | * |
| 36 | ******************************************************************************* |
| 37 | */ |
| 38 | |
| 39 | #ifndef IH264E_INTRA_MODES_EVAL_H_ |
| 40 | #define IH264E_INTRA_MODES_EVAL_H_ |
| 41 | |
| 42 | /*****************************************************************************/ |
| 43 | /* Extern Function Declarations */ |
| 44 | /*****************************************************************************/ |
| 45 | |
| 46 | /** |
| 47 | ****************************************************************************** |
| 48 | * |
| 49 | * @brief |
| 50 | * derivation process for macroblock availability |
| 51 | * |
| 52 | * @par Description |
| 53 | * Calculates the availability of the left, top, topright and topleft macroblocks. |
| 54 | * |
| 55 | * @param[in] ps_proc_ctxt |
| 56 | * pointer to proc context (handle) |
| 57 | * |
| 58 | * @remarks Based on section 6.4.5 in H264 spec |
| 59 | * |
| 60 | * @return none |
| 61 | * |
| 62 | ****************************************************************************** |
| 63 | */ |
| 64 | void ih264e_derive_nghbr_avbl_of_mbs |
| 65 | ( |
| 66 | process_ctxt_t *ps_proc_ctxt |
| 67 | ); |
| 68 | |
| 69 | /** |
| 70 | ****************************************************************************** |
| 71 | * |
| 72 | * @brief |
| 73 | * derivation process for subblock/partition availability |
| 74 | * |
| 75 | * @par Description |
| 76 | * Calculates the availability of the left, top, topright and topleft subblock |
| 77 | * or partitions. |
| 78 | * |
| 79 | * @param[in] ps_proc_ctxt |
| 80 | * pointer to macroblock context (handle) |
| 81 | * |
| 82 | * @param[in] i1_pel_pos_x |
| 83 | * column position of the pel wrt the current block |
| 84 | * |
| 85 | * @param[in] i1_pel_pos_y |
| 86 | * row position of the pel in wrt current block |
| 87 | * |
| 88 | * @remarks Assumptions: before calling this function it is assumed that |
| 89 | * the neighbor availability of the current macroblock is already derived. |
| 90 | * Based on table 6-3 of H264 specification |
| 91 | * |
| 92 | * @return availability status (yes or no) |
| 93 | * |
| 94 | ****************************************************************************** |
| 95 | */ |
| 96 | UWORD8 ih264e_derive_ngbr_avbl_of_mb_partitions |
| 97 | ( |
| 98 | block_neighbors_t *s_ngbr_avbl, |
| 99 | WORD8 i1_pel_pos_x, |
| 100 | WORD8 i1_pel_pos_y |
| 101 | ); |
| 102 | |
| 103 | /** |
| 104 | ****************************************************************************** |
| 105 | * |
| 106 | * @brief |
| 107 | * evaluate best intra 16x16 mode (rate distortion opt off) |
| 108 | * |
| 109 | * @par Description |
| 110 | * This function evaluates all the possible intra 16x16 modes and finds the mode |
| 111 | * that best represents the macro-block (least distortion) and occupies fewer |
| 112 | * bits in the bit-stream. |
| 113 | * |
| 114 | * @param[in] ps_proc_ctxt |
| 115 | * pointer to process context (handle) |
| 116 | * |
| 117 | * @remarks |
| 118 | * Ideally the cost of encoding a macroblock is calculated as |
| 119 | * (distortion + lambda*rate). Where distortion is SAD/SATD,... between the |
| 120 | * input block and the reconstructed block and rate is the number of bits taken |
| 121 | * to place the macroblock in the bit-stream. In this routine the rate does not |
| 122 | * exactly point to the total number of bits it takes, rather it points to header |
| 123 | * bits necessary for encoding the macroblock. Assuming the deltaQP, cbp bits |
| 124 | * and residual bits fall in to texture bits the number of bits taken to encoding |
| 125 | * mbtype is considered as rate, we compute cost. Further we will approximate |
| 126 | * the distortion as the deviation b/w input and the predicted block as opposed |
| 127 | * to input and reconstructed block. |
| 128 | * |
| 129 | * NOTE: As per the Document JVT-O079, for intra 16x16 macroblock, |
| 130 | * the SAD and cost are one and the same. |
| 131 | * |
| 132 | * @return none |
| 133 | * |
| 134 | ****************************************************************************** |
| 135 | */ |
| 136 | void ih264e_evaluate_intra16x16_modes_for_least_cost_rdoptoff |
| 137 | ( |
| 138 | process_ctxt_t *ps_proc_ctxt |
| 139 | ); |
| 140 | |
| 141 | /** |
| 142 | ****************************************************************************** |
| 143 | * |
| 144 | * @brief |
| 145 | * evaluate best intra 8x8 mode (rate distortion opt on) |
| 146 | * |
| 147 | * @par Description |
| 148 | * This function evaluates all the possible intra 8x8 modes and finds the mode |
| 149 | * that best represents the macro-block (least distortion) and occupies fewer |
| 150 | * bits in the bit-stream. |
| 151 | * |
| 152 | * @param[in] ps_proc_ctxt |
| 153 | * pointer to proc ctxt |
| 154 | * |
| 155 | * @remarks Ideally the cost of encoding a macroblock is calculated as |
| 156 | * (distortion + lambda*rate). Where distortion is SAD/SATD,... between the |
| 157 | * input block and the reconstructed block and rate is the number of bits taken |
| 158 | * to place the macroblock in the bit-stream. In this routine the rate does not |
| 159 | * exactly point to the total number of bits it takes, rather it points to header |
| 160 | * bits necessary for encoding the macroblock. Assuming the deltaQP, cbp bits |
| 161 | * and residual bits fall in to texture bits the number of bits taken to encoding |
| 162 | * mbtype is considered as rate, we compute cost. Further we will approximate |
| 163 | * the distortion as the deviation b/w input and the predicted block as opposed |
| 164 | * to input and reconstructed block. |
| 165 | * |
| 166 | * NOTE: TODO: This function needs to be tested |
| 167 | * |
| 168 | * @return none |
| 169 | * |
| 170 | ****************************************************************************** |
| 171 | */ |
| 172 | void ih264e_evaluate_intra8x8_modes_for_least_cost_rdoptoff |
| 173 | ( |
| 174 | process_ctxt_t *ps_proc_ctxt |
| 175 | ); |
| 176 | |
| 177 | /** |
| 178 | ****************************************************************************** |
| 179 | * |
| 180 | * @brief |
| 181 | * evaluate best intra 4x4 mode (rate distortion opt on) |
| 182 | * |
| 183 | * @par Description |
| 184 | * This function evaluates all the possible intra 4x4 modes and finds the mode |
| 185 | * that best represents the macro-block (least distortion) and occupies fewer |
| 186 | * bits in the bit-stream. |
| 187 | * |
| 188 | * @param[in] ps_proc_ctxt |
| 189 | * pointer to proc ctxt |
| 190 | * |
| 191 | * @remarks |
| 192 | * Ideally the cost of encoding a macroblock is calculated as |
| 193 | * (distortion + lambda*rate). Where distortion is SAD/SATD,... between the |
| 194 | * input block and the reconstructed block and rate is the number of bits taken |
| 195 | * to place the macroblock in the bit-stream. In this routine the rate does not |
| 196 | * exactly point to the total number of bits it takes, rather it points to header |
| 197 | * bits necessary for encoding the macroblock. Assuming the deltaQP, cbp bits |
| 198 | * and residual bits fall in to texture bits the number of bits taken to encoding |
| 199 | * mbtype is considered as rate, we compute cost. Further we will approximate |
| 200 | * the distortion as the deviation b/w input and the predicted block as opposed |
| 201 | * to input and reconstructed block. |
| 202 | * |
| 203 | * NOTE: As per the Document JVT-O079, for the whole intra 4x4 macroblock, |
| 204 | * 24*lambda is added to the SAD before comparison with the best SAD for |
| 205 | * inter prediction. This is an empirical value to prevent using too many intra |
| 206 | * blocks. |
| 207 | * |
| 208 | * @return none |
| 209 | * |
| 210 | ****************************************************************************** |
| 211 | */ |
| 212 | void ih264e_evaluate_intra4x4_modes_for_least_cost_rdopton |
| 213 | ( |
| 214 | process_ctxt_t *ps_proc_ctxt |
| 215 | ); |
| 216 | |
| 217 | /** |
| 218 | ****************************************************************************** |
| 219 | * |
| 220 | * @brief |
| 221 | * evaluate best intra 4x4 mode (rate distortion opt off) |
| 222 | * |
| 223 | * @par Description |
| 224 | * This function evaluates all the possible intra 4x4 modes and finds the mode |
| 225 | * that best represents the macro-block (least distortion) and occupies fewer |
| 226 | * bits in the bit-stream. |
| 227 | * |
| 228 | * @param[in] ps_proc_ctxt |
| 229 | * pointer to proc ctxt |
| 230 | * |
| 231 | * @remarks |
| 232 | * Ideally the cost of encoding a macroblock is calculated as |
| 233 | * (distortion + lambda*rate). Where distortion is SAD/SATD,... between the |
| 234 | * input block and the reconstructed block and rate is the number of bits taken |
| 235 | * to place the macroblock in the bit-stream. In this routine the rate does not |
| 236 | * exactly point to the total number of bits it takes, rather it points to header |
| 237 | * bits necessary for encoding the macroblock. Assuming the deltaQP, cbp bits |
| 238 | * and residual bits fall in to texture bits the number of bits taken to encoding |
| 239 | * mbtype is considered as rate, we compute cost. Further we will approximate |
| 240 | * the distortion as the deviation b/w input and the predicted block as opposed |
| 241 | * to input and reconstructed block. |
| 242 | * |
| 243 | * NOTE: As per the Document JVT-O079, for the whole intra 4x4 macroblock, |
| 244 | * 24*lambda is added to the SAD before comparison with the best SAD for |
| 245 | * inter prediction. This is an empirical value to prevent using too many intra |
| 246 | * blocks. |
| 247 | * |
| 248 | * @return none |
| 249 | * |
| 250 | ****************************************************************************** |
| 251 | */ |
| 252 | void ih264e_evaluate_intra4x4_modes_for_least_cost_rdoptoff |
| 253 | ( |
| 254 | process_ctxt_t *ps_proc_ctxt |
| 255 | ); |
| 256 | |
| 257 | /** |
| 258 | ****************************************************************************** |
| 259 | * |
| 260 | * @brief |
| 261 | * evaluate best chroma intra 8x8 mode (rate distortion opt off) |
| 262 | * |
| 263 | * @par Description |
| 264 | * This function evaluates all the possible chroma intra 8x8 modes and finds |
| 265 | * the mode that best represents the macroblock (least distortion) and occupies |
| 266 | * fewer bits in the bitstream. |
| 267 | * |
| 268 | * @param[in] ps_proc_ctxt |
| 269 | * pointer to macroblock context (handle) |
| 270 | * |
| 271 | * @remarks |
| 272 | * For chroma best intra pred mode is calculated based only on SAD |
| 273 | * |
| 274 | * @returns none |
| 275 | * |
| 276 | ****************************************************************************** |
| 277 | */ |
| 278 | void ih264e_evaluate_chroma_intra8x8_modes_for_least_cost_rdoptoff |
| 279 | ( |
| 280 | process_ctxt_t *ps_proc_ctxt |
| 281 | ); |
| 282 | |
| 283 | |
| 284 | /** |
| 285 | ****************************************************************************** |
| 286 | * |
| 287 | * @brief |
| 288 | * Evaluate best intra 16x16 mode (among VERT, HORZ and DC) and do the |
| 289 | * prediction. |
| 290 | * |
| 291 | * @par Description |
| 292 | * This function evaluates first three 16x16 modes and compute corresponding sad |
| 293 | * and return the buffer predicted with best mode. |
| 294 | * |
| 295 | * @param[in] pu1_src |
| 296 | * UWORD8 pointer to the source |
| 297 | * |
| 298 | * @param[in] pu1_ngbr_pels_i16 |
| 299 | * UWORD8 pointer to neighbouring pels |
| 300 | * |
| 301 | * @param[out] pu1_dst |
| 302 | * UWORD8 pointer to the destination |
| 303 | * |
| 304 | * @param[in] src_strd |
| 305 | * integer source stride |
| 306 | * |
| 307 | * @param[in] dst_strd |
| 308 | * integer destination stride |
| 309 | * |
| 310 | * @param[in] u4_n_avblty |
| 311 | * availability of neighbouring pixels |
| 312 | * |
| 313 | * @param[in] u4_intra_mode |
| 314 | * Pointer to the variable in which best mode is returned |
| 315 | * |
| 316 | * @param[in] pu4_sadmin |
| 317 | * Pointer to the variable in which minimum sad is returned |
| 318 | * |
| 319 | * @param[in] u4_valid_intra_modes |
| 320 | * Says what all modes are valid |
| 321 | * |
| 322 | * @returns none |
| 323 | * |
| 324 | ****************************************************************************** |
| 325 | */ |
| 326 | typedef void ih264e_evaluate_intra_modes_ft(UWORD8 *pu1_src, |
| 327 | UWORD8 *pu1_ngbr_pels_i16, |
| 328 | UWORD8 *pu1_dst, |
| 329 | UWORD32 src_strd, |
| 330 | UWORD32 dst_strd, |
| 331 | WORD32 u4_n_avblty, |
| 332 | UWORD32 *u4_intra_mode, |
| 333 | WORD32 *pu4_sadmin, |
| 334 | UWORD32 u4_valid_intra_modes); |
| 335 | |
| 336 | ih264e_evaluate_intra_modes_ft ih264e_evaluate_intra16x16_modes; |
| 337 | ih264e_evaluate_intra_modes_ft ih264e_evaluate_intra_chroma_modes; |
| 338 | |
| 339 | /* assembly */ |
| 340 | ih264e_evaluate_intra_modes_ft ih264e_evaluate_intra16x16_modes_a9q; |
| 341 | ih264e_evaluate_intra_modes_ft ih264e_evaluate_intra_chroma_modes_a9q; |
| 342 | |
| 343 | ih264e_evaluate_intra_modes_ft ih264e_evaluate_intra16x16_modes_av8; |
| 344 | ih264e_evaluate_intra_modes_ft ih264e_evaluate_intra_chroma_modes_av8; |
| 345 | |
| 346 | /* x86 intrinsics */ |
| 347 | ih264e_evaluate_intra_modes_ft ih264e_evaluate_intra16x16_modes_ssse3; |
| 348 | ih264e_evaluate_intra_modes_ft ih264e_evaluate_intra_chroma_modes_ssse3; |
| 349 | |
| 350 | /** |
| 351 | ****************************************************************************** |
| 352 | * |
| 353 | * @brief |
| 354 | * Evaluate best intra 4x4 mode and perform prediction. |
| 355 | * |
| 356 | * @par Description |
| 357 | * This function evaluates 4x4 modes and compute corresponding sad |
| 358 | * and return the buffer predicted with best mode. |
| 359 | * |
| 360 | * @param[in] pu1_src |
| 361 | * UWORD8 pointer to the source |
| 362 | * |
| 363 | * @param[in] pu1_ngbr_pels |
| 364 | * UWORD8 pointer to neighbouring pels |
| 365 | * |
| 366 | * @param[out] pu1_dst |
| 367 | * UWORD8 pointer to the destination |
| 368 | * |
| 369 | * @param[in] src_strd |
| 370 | * integer source stride |
| 371 | * |
| 372 | * @param[in] dst_strd |
| 373 | * integer destination stride |
| 374 | * |
| 375 | * @param[in] u4_n_avblty |
| 376 | * availability of neighbouring pixels |
| 377 | * |
| 378 | * @param[in] u4_intra_mode |
| 379 | * Pointer to the variable in which best mode is returned |
| 380 | * |
| 381 | * @param[in] pu4_sadmin |
| 382 | * Pointer to the variable in which minimum cost is returned |
| 383 | * |
| 384 | * @param[in] u4_valid_intra_modes |
| 385 | * Says what all modes are valid |
| 386 | * |
| 387 | * @param[in] u4_lambda |
| 388 | * Lamda value for computing cost from SAD |
| 389 | * |
| 390 | * @param[in] u4_predictd_mode |
| 391 | * Predicted mode for cost computation |
| 392 | * |
| 393 | * @returns none |
| 394 | * |
| 395 | ****************************************************************************** |
| 396 | */ |
| 397 | typedef void ih264e_evaluate_intra_4x4_modes_ft(UWORD8 *pu1_src, |
| 398 | UWORD8 *pu1_ngbr_pels, |
| 399 | UWORD8 *pu1_dst, |
| 400 | UWORD32 src_strd, |
| 401 | UWORD32 dst_strd, |
| 402 | WORD32 u4_n_avblty, |
| 403 | UWORD32 *u4_intra_mode, |
| 404 | WORD32 *pu4_sadmin, |
| 405 | UWORD32 u4_valid_intra_modes, |
| 406 | UWORD32 u4_lambda, |
| 407 | UWORD32 u4_predictd_mode); |
| 408 | |
| 409 | ih264e_evaluate_intra_4x4_modes_ft ih264e_evaluate_intra_4x4_modes; |
| 410 | |
| 411 | /* x86 intrinsics */ |
| 412 | ih264e_evaluate_intra_4x4_modes_ft ih264e_evaluate_intra_4x4_modes_ssse3; |
| 413 | |
| 414 | /* assembly */ |
| 415 | ih264e_evaluate_intra_4x4_modes_ft ih264e_evaluate_intra_4x4_modes_a9q; |
| 416 | ih264e_evaluate_intra_4x4_modes_ft ih264e_evaluate_intra_4x4_modes_av8; |
| 417 | |
| 418 | #endif /* IH264E_INTRA_MODES_EVAL_H_ */ |