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 | /* File Name : ih264_weighted_pred.c */ |
| 23 | /* */ |
| 24 | /* Description : Contains function definitions for weighted */ |
| 25 | /* prediction functions */ |
| 26 | /* */ |
| 27 | /* List of Functions : ih264_default_weighted_pred_luma() */ |
| 28 | /* ih264_default_weighted_pred_chroma() */ |
| 29 | /* ih264_weighted_pred_luma() */ |
| 30 | /* ih264_weighted_pred_chroma() */ |
| 31 | /* ih264_weighted_bipred_luma() */ |
| 32 | /* ih264_weighted_bipred_chroma() */ |
| 33 | /* */ |
| 34 | /* Issues / Problems : None */ |
| 35 | /* */ |
| 36 | /* Revision History : */ |
| 37 | /* */ |
| 38 | /* DD MM YYYY Author(s) Changes */ |
| 39 | /* 07 01 2015 Kaushik Initial version */ |
| 40 | /* Senthoor */ |
| 41 | /* */ |
| 42 | /*****************************************************************************/ |
| 43 | /*****************************************************************************/ |
| 44 | /* File Includes */ |
| 45 | /*****************************************************************************/ |
| 46 | |
| 47 | /* User include files */ |
| 48 | #include "ih264_typedefs.h" |
| 49 | #include "ih264_macros.h" |
| 50 | #include "ih264_platform_macros.h" |
| 51 | #include "ih264_weighted_pred.h" |
| 52 | |
| 53 | /*****************************************************************************/ |
| 54 | /* Function definitions . */ |
| 55 | /*****************************************************************************/ |
| 56 | /*****************************************************************************/ |
| 57 | /* */ |
| 58 | /* Function Name : ih264_default_weighted_pred_luma */ |
| 59 | /* */ |
| 60 | /* Description : This function performs the default weighted prediction */ |
| 61 | /* as described in sec 8.4.2.3.1 titled "Default weighted */ |
| 62 | /* sample prediction process" for luma. The function gets */ |
| 63 | /* two ht x wd blocks, calculates their rounded-average and */ |
| 64 | /* stores it in the destination block. (ht,wd) can be */ |
| 65 | /* (4,4), (8,4), (4,8), (8,8), (16,8), (8,16) or (16,16). */ |
| 66 | /* */ |
| 67 | /* Inputs : puc_src1 - Pointer to source 1 */ |
| 68 | /* puc_src2 - Pointer to source 2 */ |
| 69 | /* puc_dst - Pointer to destination */ |
| 70 | /* src_strd1 - stride for source 1 */ |
| 71 | /* src_strd1 - stride for source 2 */ |
| 72 | /* dst_strd - stride for destination */ |
| 73 | /* ht - height of the block */ |
| 74 | /* wd - width of the block */ |
| 75 | /* */ |
| 76 | /* Issues : None */ |
| 77 | /* */ |
| 78 | /* Revision History: */ |
| 79 | /* */ |
| 80 | /* DD MM YYYY Author(s) Changes */ |
| 81 | /* 07 01 2015 Kaushik Initial Version */ |
| 82 | /* Senthoor */ |
| 83 | /* */ |
| 84 | /*****************************************************************************/ |
| 85 | void ih264_default_weighted_pred_luma(UWORD8 *pu1_src1, |
| 86 | UWORD8 *pu1_src2, |
| 87 | UWORD8 *pu1_dst, |
| 88 | WORD32 src_strd1, |
| 89 | WORD32 src_strd2, |
| 90 | WORD32 dst_strd, |
| 91 | WORD32 ht, |
| 92 | WORD32 wd) |
| 93 | { |
| 94 | WORD32 i, j; |
| 95 | |
| 96 | src_strd1 -= wd; |
| 97 | src_strd2 -= wd; |
| 98 | dst_strd -= wd; |
| 99 | |
| 100 | for(i = 0; i < ht; i++) |
| 101 | { |
| 102 | for(j = 0; j < wd; j++, pu1_src1++, pu1_src2++, pu1_dst++) |
| 103 | *pu1_dst = (*pu1_src1 + *pu1_src2 + 1) >> 1; |
| 104 | |
| 105 | pu1_src1 += src_strd1; |
| 106 | pu1_src2 += src_strd2; |
| 107 | pu1_dst += dst_strd; |
| 108 | } |
| 109 | } |
| 110 | |
| 111 | /*****************************************************************************/ |
| 112 | /* */ |
| 113 | /* Function Name : ih264_default_weighted_pred_chroma */ |
| 114 | /* */ |
| 115 | /* Description : This function performs the default weighted prediction */ |
| 116 | /* as described in sec 8.4.2.3.1 titled "Default weighted */ |
| 117 | /* sample prediction process" for chroma. The function gets */ |
| 118 | /* two ht x wd blocks, calculates their rounded-average and */ |
| 119 | /* stores it in the destination block. (ht,wd) can be */ |
| 120 | /* (2,2), (4,2) , (2,4), (4,4), (8,4), (4,8) or (8,8). */ |
| 121 | /* */ |
| 122 | /* Inputs : puc_src1 - Pointer to source 1 */ |
| 123 | /* puc_src2 - Pointer to source 2 */ |
| 124 | /* puc_dst - Pointer to destination */ |
| 125 | /* src_strd1 - stride for source 1 */ |
| 126 | /* src_strd1 - stride for source 2 */ |
| 127 | /* dst_strd - stride for destination */ |
| 128 | /* ht - height of the block */ |
| 129 | /* wd - width of the block */ |
| 130 | /* */ |
| 131 | /* Issues : None */ |
| 132 | /* */ |
| 133 | /* Revision History: */ |
| 134 | /* */ |
| 135 | /* DD MM YYYY Author(s) Changes */ |
| 136 | /* 07 01 2015 Kaushik Initial Version */ |
| 137 | /* Senthoor */ |
| 138 | /* */ |
| 139 | /*****************************************************************************/ |
| 140 | void ih264_default_weighted_pred_chroma(UWORD8 *pu1_src1, |
| 141 | UWORD8 *pu1_src2, |
| 142 | UWORD8 *pu1_dst, |
| 143 | WORD32 src_strd1, |
| 144 | WORD32 src_strd2, |
| 145 | WORD32 dst_strd, |
| 146 | WORD32 ht, |
| 147 | WORD32 wd) |
| 148 | { |
| 149 | WORD32 i, j; |
| 150 | |
| 151 | wd = wd << 1; |
| 152 | |
| 153 | src_strd1 -= wd; |
| 154 | src_strd2 -= wd; |
| 155 | dst_strd -= wd; |
| 156 | |
| 157 | for(i = 0; i < ht; i++) |
| 158 | { |
| 159 | for(j = 0; j < wd; j++, pu1_src1++, pu1_src2++, pu1_dst++) |
| 160 | *pu1_dst = (*pu1_src1 + *pu1_src2 + 1) >> 1; |
| 161 | |
| 162 | pu1_src1 += src_strd1; |
| 163 | pu1_src2 += src_strd2; |
| 164 | pu1_dst += dst_strd; |
| 165 | } |
| 166 | } |
| 167 | |
| 168 | /*****************************************************************************/ |
| 169 | /* */ |
| 170 | /* Function Name : ih264_weighted_pred_luma */ |
| 171 | /* */ |
| 172 | /* Description : This function performs the weighted prediction as */ |
| 173 | /* described in sec 8.4.2.3.2 titled "Weighted sample */ |
| 174 | /* prediction process" for luma. The function gets one */ |
| 175 | /* ht x wd block, weights it, rounds it off, offsets it, */ |
| 176 | /* saturates it to unsigned 8-bit and stores it in the */ |
| 177 | /* destination block. (ht,wd) can be (4,4), (8,4), (4,8), */ |
| 178 | /* (8,8), (16,8), (8,16) or (16,16). */ |
| 179 | /* */ |
| 180 | /* Inputs : puc_src - Pointer to source */ |
| 181 | /* puc_dst - Pointer to destination */ |
| 182 | /* src_strd - stride for source */ |
| 183 | /* dst_strd - stride for destination */ |
| 184 | /* log_wd - number of bits to be rounded off */ |
| 185 | /* wt - weight value */ |
| 186 | /* ofst - offset value */ |
| 187 | /* ht - height of the block */ |
| 188 | /* wd - width of the block */ |
| 189 | /* */ |
| 190 | /* Issues : None */ |
| 191 | /* */ |
| 192 | /* Revision History: */ |
| 193 | /* */ |
| 194 | /* DD MM YYYY Author(s) Changes */ |
| 195 | /* 07 01 2015 Kaushik Initial Version */ |
| 196 | /* Senthoor */ |
| 197 | /* */ |
| 198 | /*****************************************************************************/ |
| 199 | void ih264_weighted_pred_luma(UWORD8 *pu1_src, |
| 200 | UWORD8 *pu1_dst, |
| 201 | WORD32 src_strd, |
| 202 | WORD32 dst_strd, |
| 203 | WORD32 log_wd, |
| 204 | WORD32 wt, |
| 205 | WORD32 ofst, |
| 206 | WORD32 ht, |
| 207 | WORD32 wd) |
| 208 | { |
| 209 | WORD32 i, j; |
| 210 | |
| 211 | wt = (WORD16)(wt & 0xffff); |
| 212 | ofst = (WORD8)(ofst & 0xff); |
| 213 | |
| 214 | src_strd -= wd; |
| 215 | dst_strd -= wd; |
| 216 | |
| 217 | if(log_wd >= 1) |
| 218 | { |
| 219 | WORD32 i_ofst = (1 << (log_wd - 1)) + (ofst << log_wd); |
| 220 | for(i = 0; i < ht; i++) |
| 221 | { |
| 222 | for(j = 0; j < wd; j++, pu1_src++, pu1_dst++) |
| 223 | *pu1_dst = CLIP_U8((wt * (*pu1_src) + i_ofst) >> log_wd); |
| 224 | |
| 225 | pu1_src += src_strd; |
| 226 | pu1_dst += dst_strd; |
| 227 | } |
| 228 | } |
| 229 | else |
| 230 | { |
| 231 | for(i = 0; i < ht; i++) |
| 232 | { |
| 233 | for(j = 0; j < wd; j++, pu1_src++, pu1_dst++) |
| 234 | *pu1_dst = CLIP_U8(wt * (*pu1_src) + ofst); |
| 235 | |
| 236 | pu1_src += src_strd; |
| 237 | pu1_dst += dst_strd; |
| 238 | } |
| 239 | } |
| 240 | } |
| 241 | |
| 242 | /*****************************************************************************/ |
| 243 | /* */ |
| 244 | /* Function Name : ih264_weighted_pred_chroma */ |
| 245 | /* */ |
| 246 | /* Description : This function performs the weighted prediction as */ |
| 247 | /* described in sec 8.4.2.3.2 titled "Weighted sample */ |
| 248 | /* prediction process" for chroma. The function gets one */ |
| 249 | /* ht x wd block, weights it, rounds it off, offsets it, */ |
| 250 | /* saturates it to unsigned 8-bit and stores it in the */ |
| 251 | /* destination block. (ht,wd) can be (2,2), (4,2), (2,4), */ |
| 252 | /* (4,4), (8,4), (4,8) or (8,8). */ |
| 253 | /* */ |
| 254 | /* Inputs : puc_src - Pointer to source */ |
| 255 | /* puc_dst - Pointer to destination */ |
| 256 | /* src_strd - stride for source */ |
| 257 | /* dst_strd - stride for destination */ |
| 258 | /* log_wd - number of bits to be rounded off */ |
| 259 | /* wt - weight values for u and v */ |
| 260 | /* ofst - offset values for u and v */ |
| 261 | /* ht - height of the block */ |
| 262 | /* wd - width of the block */ |
| 263 | /* */ |
| 264 | /* Issues : None */ |
| 265 | /* */ |
| 266 | /* Revision History: */ |
| 267 | /* */ |
| 268 | /* DD MM YYYY Author(s) Changes */ |
| 269 | /* 07 01 2015 Kaushik Initial Version */ |
| 270 | /* Senthoor */ |
| 271 | /* */ |
| 272 | /*****************************************************************************/ |
| 273 | void ih264_weighted_pred_chroma(UWORD8 *pu1_src, |
| 274 | UWORD8 *pu1_dst, |
| 275 | WORD32 src_strd, |
| 276 | WORD32 dst_strd, |
| 277 | WORD32 log_wd, |
| 278 | WORD32 wt, |
| 279 | WORD32 ofst, |
| 280 | WORD32 ht, |
| 281 | WORD32 wd) |
| 282 | { |
| 283 | WORD32 i, j; |
| 284 | WORD32 wt_u, wt_v; |
| 285 | WORD32 ofst_u, ofst_v; |
| 286 | |
| 287 | wt_u = (WORD16)(wt & 0xffff); |
| 288 | wt_v = (WORD16)(wt >> 16); |
| 289 | |
| 290 | ofst_u = (WORD8)(ofst & 0xff); |
| 291 | ofst_v = (WORD8)(ofst >> 8); |
| 292 | |
| 293 | src_strd -= wd << 1; |
| 294 | dst_strd -= wd << 1; |
| 295 | |
| 296 | if(log_wd >= 1) |
| 297 | { |
| 298 | ofst_u = (1 << (log_wd - 1)) + (ofst_u << log_wd); |
| 299 | ofst_v = (1 << (log_wd - 1)) + (ofst_v << log_wd); |
| 300 | |
| 301 | for(i = 0; i < ht; i++) |
| 302 | { |
| 303 | for(j = 0; j < wd; j++, pu1_src++, pu1_dst++) |
| 304 | { |
| 305 | *pu1_dst = CLIP_U8((wt_u * (*pu1_src) + ofst_u) >> log_wd); |
| 306 | pu1_src++; |
| 307 | pu1_dst++; |
| 308 | *pu1_dst = CLIP_U8((wt_v * (*pu1_src) + ofst_v) >> log_wd); |
| 309 | } |
| 310 | pu1_src += src_strd; |
| 311 | pu1_dst += dst_strd; |
| 312 | } |
| 313 | } |
| 314 | else |
| 315 | { |
| 316 | for(i = 0; i < ht; i++) |
| 317 | { |
| 318 | for(j = 0; j < wd; j++, pu1_src++, pu1_dst++) |
| 319 | { |
| 320 | *pu1_dst = CLIP_U8(wt_u * (*pu1_src) + ofst_u); |
| 321 | pu1_src++; |
| 322 | pu1_dst++; |
| 323 | *pu1_dst = CLIP_U8(wt_v * (*pu1_src) + ofst_v); |
| 324 | } |
| 325 | pu1_src += src_strd; |
| 326 | pu1_dst += dst_strd; |
| 327 | } |
| 328 | } |
| 329 | } |
| 330 | |
| 331 | /*****************************************************************************/ |
| 332 | /* */ |
| 333 | /* Function Name : ih264_weighted_bi_pred_luma */ |
| 334 | /* */ |
| 335 | /* Description : This function performs the weighted biprediction as */ |
| 336 | /* described in sec 8.4.2.3.2 titled "Weighted sample */ |
| 337 | /* prediction process" for luma. The function gets two */ |
| 338 | /* ht x wd blocks, weights them, adds them, rounds off the */ |
| 339 | /* sum, offsets it, saturates it to unsigned 8-bit and */ |
| 340 | /* stores it in the destination block. (ht,wd) can be */ |
| 341 | /* (4,4), (8,4), (4,8), (8,8), (16,8), (8,16) or (16,16). */ |
| 342 | /* */ |
| 343 | /* Inputs : puc_src1 - Pointer to source 1 */ |
| 344 | /* puc_src2 - Pointer to source 2 */ |
| 345 | /* puc_dst - Pointer to destination */ |
| 346 | /* src_strd1 - stride for source 1 */ |
| 347 | /* src_strd2 - stride for source 2 */ |
| 348 | /* dst_strd2 - stride for destination */ |
| 349 | /* log_wd - number of bits to be rounded off */ |
| 350 | /* wt1 - weight value for source 1 */ |
| 351 | /* wt2 - weight value for source 2 */ |
| 352 | /* ofst1 - offset value for source 1 */ |
| 353 | /* ofst2 - offset value for source 2 */ |
| 354 | /* ht - height of the block */ |
| 355 | /* wd - width of the block */ |
| 356 | /* */ |
| 357 | /* Issues : None */ |
| 358 | /* */ |
| 359 | /* Revision History: */ |
| 360 | /* */ |
| 361 | /* DD MM YYYY Author(s) Changes */ |
| 362 | /* 07 01 2015 Kaushik Initial Version */ |
| 363 | /* Senthoor */ |
| 364 | /* */ |
| 365 | /*****************************************************************************/ |
| 366 | void ih264_weighted_bi_pred_luma(UWORD8 *pu1_src1, |
| 367 | UWORD8 *pu1_src2, |
| 368 | UWORD8 *pu1_dst, |
| 369 | WORD32 src_strd1, |
| 370 | WORD32 src_strd2, |
| 371 | WORD32 dst_strd, |
| 372 | WORD32 log_wd, |
| 373 | WORD32 wt1, |
| 374 | WORD32 wt2, |
| 375 | WORD32 ofst1, |
| 376 | WORD32 ofst2, |
| 377 | WORD32 ht, |
| 378 | WORD32 wd) |
| 379 | { |
| 380 | WORD32 i, j; |
| 381 | WORD32 shft, ofst; |
| 382 | |
| 383 | ofst1 = (WORD8)(ofst1 & 0xff); |
| 384 | ofst2 = (WORD8)(ofst2 & 0xff); |
| 385 | wt1 = (WORD16)(wt1 & 0xffff); |
| 386 | wt2 = (WORD16)(wt2 & 0xffff); |
| 387 | ofst = (ofst1 + ofst2 + 1) >> 1; |
| 388 | |
| 389 | shft = log_wd + 1; |
| 390 | ofst = (1 << log_wd) + (ofst << shft); |
| 391 | |
| 392 | src_strd1 -= wd; |
| 393 | src_strd2 -= wd; |
| 394 | dst_strd -= wd; |
| 395 | |
| 396 | for(i = 0; i < ht; i++) |
| 397 | { |
| 398 | for(j = 0; j < wd; j++, pu1_src1++, pu1_src2++, pu1_dst++) |
| 399 | *pu1_dst = CLIP_U8((wt1 * (*pu1_src1) + wt2 * (*pu1_src2) + ofst) >> shft); |
| 400 | |
| 401 | pu1_src1 += src_strd1; |
| 402 | pu1_src2 += src_strd2; |
| 403 | pu1_dst += dst_strd; |
| 404 | } |
| 405 | } |
| 406 | |
| 407 | /*****************************************************************************/ |
| 408 | /* */ |
| 409 | /* Function Name : ih264_weighted_bi_pred_chroma */ |
| 410 | /* */ |
| 411 | /* Description : This function performs the weighted biprediction as */ |
| 412 | /* described in sec 8.4.2.3.2 titled "Weighted sample */ |
| 413 | /* prediction process" for chroma. The function gets two */ |
| 414 | /* ht x wd blocks, weights them, adds them, rounds off the */ |
| 415 | /* sum, offsets it, saturates it to unsigned 8-bit and */ |
| 416 | /* stores it in the destination block. (ht,wd) can be */ |
| 417 | /* (2,2), (4,2), (2,4), (4,4), (8,4), (4,8) or (8,8). */ |
| 418 | /* */ |
| 419 | /* Inputs : puc_src1 - Pointer to source 1 */ |
| 420 | /* puc_src2 - Pointer to source 2 */ |
| 421 | /* puc_dst - Pointer to destination */ |
| 422 | /* src_strd1 - stride for source 1 */ |
| 423 | /* src_strd2 - stride for source 2 */ |
| 424 | /* dst_strd2 - stride for destination */ |
| 425 | /* log_wd - number of bits to be rounded off */ |
| 426 | /* wt1 - weight values for u and v in source 1 */ |
| 427 | /* wt2 - weight values for u and v in source 2 */ |
| 428 | /* ofst1 - offset value for u and v in source 1 */ |
| 429 | /* ofst2 - offset value for u and v in source 2 */ |
| 430 | /* ht - height of the block */ |
| 431 | /* wd - width of the block */ |
| 432 | /* */ |
| 433 | /* Issues : None */ |
| 434 | /* */ |
| 435 | /* Revision History: */ |
| 436 | /* */ |
| 437 | /* DD MM YYYY Author(s) Changes */ |
| 438 | /* 07 01 2015 Kaushik Initial Version */ |
| 439 | /* Senthoor */ |
| 440 | /* */ |
| 441 | /*****************************************************************************/ |
| 442 | void ih264_weighted_bi_pred_chroma(UWORD8 *pu1_src1, |
| 443 | UWORD8 *pu1_src2, |
| 444 | UWORD8 *pu1_dst, |
| 445 | WORD32 src_strd1, |
| 446 | WORD32 src_strd2, |
| 447 | WORD32 dst_strd, |
| 448 | WORD32 log_wd, |
| 449 | WORD32 wt1, |
| 450 | WORD32 wt2, |
| 451 | WORD32 ofst1, |
| 452 | WORD32 ofst2, |
| 453 | WORD32 ht, |
| 454 | WORD32 wd) |
| 455 | { |
| 456 | WORD32 i, j; |
| 457 | WORD32 wt1_u, wt1_v, wt2_u, wt2_v; |
| 458 | WORD32 ofst1_u, ofst1_v, ofst2_u, ofst2_v; |
| 459 | WORD32 ofst_u, ofst_v; |
| 460 | WORD32 shft; |
| 461 | |
| 462 | ofst1_u = (WORD8)(ofst1 & 0xff); |
| 463 | ofst1_v = (WORD8)(ofst1 >> 8); |
| 464 | ofst2_u = (WORD8)(ofst2 & 0xff); |
| 465 | ofst2_v = (WORD8)(ofst2 >> 8); |
| 466 | wt1_u = (WORD16)(wt1 & 0xffff); |
| 467 | wt1_v = (WORD16)(wt1 >> 16); |
| 468 | wt2_u = (WORD16)(wt2 & 0xffff); |
| 469 | wt2_v = (WORD16)(wt2 >> 16); |
| 470 | ofst_u = (ofst1_u + ofst2_u + 1) >> 1; |
| 471 | ofst_v = (ofst1_v + ofst2_v + 1) >> 1; |
| 472 | |
| 473 | src_strd1 -= wd << 1; |
| 474 | src_strd2 -= wd << 1; |
| 475 | dst_strd -= wd << 1; |
| 476 | |
| 477 | shft = log_wd + 1; |
| 478 | ofst_u = (1 << log_wd) + (ofst_u << shft); |
| 479 | ofst_v = (1 << log_wd) + (ofst_v << shft); |
| 480 | |
| 481 | for(i = 0; i < ht; i++) |
| 482 | { |
| 483 | for(j = 0; j < wd; j++, pu1_src1++, pu1_src2++, pu1_dst++) |
| 484 | { |
| 485 | *pu1_dst = CLIP_U8((wt1_u * (*pu1_src1) + wt2_u * (*pu1_src2) + ofst_u) >> shft); |
| 486 | pu1_src1++; |
| 487 | pu1_src2++; |
| 488 | pu1_dst++; |
| 489 | *pu1_dst = CLIP_U8((wt1_v * (*pu1_src1) + wt2_v * (*pu1_src2) + ofst_v) >> shft); |
| 490 | } |
| 491 | pu1_src1 += src_strd1; |
| 492 | pu1_src2 += src_strd2; |
| 493 | pu1_dst += dst_strd; |
| 494 | } |
| 495 | } |