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| 1 : | edgomez | 1142 | /***************************************************************************** |
| 2 : | * | ||
| 3 : | * XVID MPEG-4 VIDEO CODEC | ||
| 4 : | * - Prediction module - | ||
| 5 : | * | ||
| 6 : | * Copyright (C) 2001-2003 Michael Militzer <isibaar@xvid.org> | ||
| 7 : | * 2001-2003 Peter Ross <pross@xvid.org> | ||
| 8 : | * | ||
| 9 : | * This program is free software ; you can redistribute it and/or modify | ||
| 10 : | * it under the terms of the GNU General Public License as published by | ||
| 11 : | * the Free Software Foundation ; either version 2 of the License, or | ||
| 12 : | * (at your option) any later version. | ||
| 13 : | * | ||
| 14 : | * This program is distributed in the hope that it will be useful, | ||
| 15 : | * but WITHOUT ANY WARRANTY ; without even the implied warranty of | ||
| 16 : | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| 17 : | * GNU General Public License for more details. | ||
| 18 : | * | ||
| 19 : | * You should have received a copy of the GNU General Public License | ||
| 20 : | * along with this program ; if not, write to the Free Software | ||
| 21 : | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | ||
| 22 : | * | ||
| 23 : | * $Id: mbprediction.c,v 1.13.2.8 2003-09-10 22:19:00 edgomez Exp $ | ||
| 24 : | * | ||
| 25 : | ****************************************************************************/ | ||
| 26 : | Isibaar | 3 | |
| 27 : | edgomez | 982 | #include <stdlib.h> |
| 28 : | |||
| 29 : | edgomez | 851 | #include "../global.h" |
| 30 : | Isibaar | 3 | #include "../encoder.h" |
| 31 : | #include "mbprediction.h" | ||
| 32 : | #include "../utils/mbfunctions.h" | ||
| 33 : | #include "../bitstream/cbp.h" | ||
| 34 : | edgomez | 851 | #include "../bitstream/mbcoding.h" |
| 35 : | #include "../bitstream/zigzag.h" | ||
| 36 : | Isibaar | 3 | |
| 37 : | |||
| 38 : | edgomez | 195 | static int __inline |
| 39 : | rescale(int predict_quant, | ||
| 40 : | int current_quant, | ||
| 41 : | int coeff) | ||
| 42 : | Isibaar | 3 | { |
| 43 : | edgomez | 195 | return (coeff != 0) ? DIV_DIV((coeff) * (predict_quant), |
| 44 : | (current_quant)) : 0; | ||
| 45 : | Isibaar | 3 | } |
| 46 : | |||
| 47 : | |||
| 48 : | edgomez | 195 | static const int16_t default_acdc_values[15] = { |
| 49 : | Isibaar | 3 | 1024, |
| 50 : | edgomez | 78 | 0, 0, 0, 0, 0, 0, 0, |
| 51 : | 0, 0, 0, 0, 0, 0, 0 | ||
| 52 : | Isibaar | 3 | }; |
| 53 : | |||
| 54 : | |||
| 55 : | /* get dc/ac prediction direction for a single block and place | ||
| 56 : | predictor values into MB->pred_values[j][..] | ||
| 57 : | */ | ||
| 58 : | |||
| 59 : | |||
| 60 : | edgomez | 195 | void |
| 61 : | predict_acdc(MACROBLOCK * pMBs, | ||
| 62 : | uint32_t x, | ||
| 63 : | uint32_t y, | ||
| 64 : | uint32_t mb_width, | ||
| 65 : | uint32_t block, | ||
| 66 : | int16_t qcoeff[64], | ||
| 67 : | uint32_t current_quant, | ||
| 68 : | int32_t iDcScaler, | ||
| 69 : | suxen_drol | 248 | int16_t predictors[8], |
| 70 : | suxen_drol | 252 | const int bound) |
| 71 : | suxen_drol | 248 | |
| 72 : | Isibaar | 3 | { |
| 73 : | suxen_drol | 252 | const int mbpos = (y * mb_width) + x; |
| 74 : | edgomez | 78 | int16_t *left, *top, *diag, *current; |
| 75 : | Isibaar | 3 | |
| 76 : | edgomez | 78 | int32_t left_quant = current_quant; |
| 77 : | int32_t top_quant = current_quant; | ||
| 78 : | Isibaar | 3 | |
| 79 : | edgomez | 78 | const int16_t *pLeft = default_acdc_values; |
| 80 : | const int16_t *pTop = default_acdc_values; | ||
| 81 : | const int16_t *pDiag = default_acdc_values; | ||
| 82 : | Isibaar | 3 | |
| 83 : | edgomez | 1053 | uint32_t index = x + y * mb_width; /* current macroblock */ |
| 84 : | edgomez | 195 | int *acpred_direction = &pMBs[index].acpred_directions[block]; |
| 85 : | Isibaar | 3 | uint32_t i; |
| 86 : | |||
| 87 : | left = top = diag = current = 0; | ||
| 88 : | |||
| 89 : | edgomez | 1053 | /* grab left,top and diag macroblocks */ |
| 90 : | Isibaar | 3 | |
| 91 : | edgomez | 1053 | /* left macroblock */ |
| 92 : | Isibaar | 3 | |
| 93 : | suxen_drol | 248 | if (x && mbpos >= bound + 1 && |
| 94 : | edgomez | 195 | (pMBs[index - 1].mode == MODE_INTRA || |
| 95 : | pMBs[index - 1].mode == MODE_INTRA_Q)) { | ||
| 96 : | Isibaar | 3 | |
| 97 : | left = pMBs[index - 1].pred_values[0]; | ||
| 98 : | left_quant = pMBs[index - 1].quant; | ||
| 99 : | } | ||
| 100 : | edgomez | 1053 | /* top macroblock */ |
| 101 : | Isibaar | 3 | |
| 102 : | suxen_drol | 252 | if (mbpos >= bound + (int)mb_width && |
| 103 : | edgomez | 195 | (pMBs[index - mb_width].mode == MODE_INTRA || |
| 104 : | pMBs[index - mb_width].mode == MODE_INTRA_Q)) { | ||
| 105 : | |||
| 106 : | Isibaar | 3 | top = pMBs[index - mb_width].pred_values[0]; |
| 107 : | top_quant = pMBs[index - mb_width].quant; | ||
| 108 : | edgomez | 78 | } |
| 109 : | edgomez | 1053 | /* diag macroblock */ |
| 110 : | Isibaar | 3 | |
| 111 : | suxen_drol | 252 | if (x && mbpos >= bound + (int)mb_width + 1 && |
| 112 : | edgomez | 195 | (pMBs[index - 1 - mb_width].mode == MODE_INTRA || |
| 113 : | pMBs[index - 1 - mb_width].mode == MODE_INTRA_Q)) { | ||
| 114 : | |||
| 115 : | Isibaar | 3 | diag = pMBs[index - 1 - mb_width].pred_values[0]; |
| 116 : | } | ||
| 117 : | |||
| 118 : | edgomez | 78 | current = pMBs[index].pred_values[0]; |
| 119 : | Isibaar | 3 | |
| 120 : | edgomez | 1053 | /* now grab pLeft, pTop, pDiag _blocks_ */ |
| 121 : | edgomez | 195 | |
| 122 : | Isibaar | 3 | switch (block) { |
| 123 : | edgomez | 195 | |
| 124 : | case 0: | ||
| 125 : | if (left) | ||
| 126 : | Isibaar | 3 | pLeft = left + MBPRED_SIZE; |
| 127 : | edgomez | 195 | |
| 128 : | if (top) | ||
| 129 : | Isibaar | 3 | pTop = top + (MBPRED_SIZE << 1); |
| 130 : | edgomez | 195 | |
| 131 : | if (diag) | ||
| 132 : | Isibaar | 3 | pDiag = diag + 3 * MBPRED_SIZE; |
| 133 : | edgomez | 195 | |
| 134 : | Isibaar | 3 | break; |
| 135 : | edgomez | 195 | |
| 136 : | Isibaar | 3 | case 1: |
| 137 : | pLeft = current; | ||
| 138 : | left_quant = current_quant; | ||
| 139 : | edgomez | 195 | |
| 140 : | if (top) { | ||
| 141 : | Isibaar | 3 | pTop = top + 3 * MBPRED_SIZE; |
| 142 : | pDiag = top + (MBPRED_SIZE << 1); | ||
| 143 : | } | ||
| 144 : | break; | ||
| 145 : | edgomez | 195 | |
| 146 : | Isibaar | 3 | case 2: |
| 147 : | edgomez | 195 | if (left) { |
| 148 : | Isibaar | 3 | pLeft = left + 3 * MBPRED_SIZE; |
| 149 : | pDiag = left + MBPRED_SIZE; | ||
| 150 : | } | ||
| 151 : | edgomez | 195 | |
| 152 : | Isibaar | 3 | pTop = current; |
| 153 : | top_quant = current_quant; | ||
| 154 : | |||
| 155 : | break; | ||
| 156 : | edgomez | 195 | |
| 157 : | Isibaar | 3 | case 3: |
| 158 : | pLeft = current + (MBPRED_SIZE << 1); | ||
| 159 : | left_quant = current_quant; | ||
| 160 : | edgomez | 195 | |
| 161 : | Isibaar | 3 | pTop = current + MBPRED_SIZE; |
| 162 : | top_quant = current_quant; | ||
| 163 : | edgomez | 195 | |
| 164 : | Isibaar | 3 | pDiag = current; |
| 165 : | edgomez | 195 | |
| 166 : | Isibaar | 3 | break; |
| 167 : | edgomez | 195 | |
| 168 : | Isibaar | 3 | case 4: |
| 169 : | edgomez | 195 | if (left) |
| 170 : | Isibaar | 3 | pLeft = left + (MBPRED_SIZE << 2); |
| 171 : | edgomez | 195 | if (top) |
| 172 : | Isibaar | 3 | pTop = top + (MBPRED_SIZE << 2); |
| 173 : | edgomez | 195 | if (diag) |
| 174 : | Isibaar | 3 | pDiag = diag + (MBPRED_SIZE << 2); |
| 175 : | break; | ||
| 176 : | edgomez | 195 | |
| 177 : | Isibaar | 3 | case 5: |
| 178 : | edgomez | 195 | if (left) |
| 179 : | Isibaar | 3 | pLeft = left + 5 * MBPRED_SIZE; |
| 180 : | edgomez | 195 | if (top) |
| 181 : | Isibaar | 3 | pTop = top + 5 * MBPRED_SIZE; |
| 182 : | edgomez | 195 | if (diag) |
| 183 : | Isibaar | 3 | pDiag = diag + 5 * MBPRED_SIZE; |
| 184 : | break; | ||
| 185 : | } | ||
| 186 : | |||
| 187 : | edgomez | 1053 | /* |
| 188 : | * determine ac prediction direction & ac/dc predictor place rescaled ac/dc | ||
| 189 : | * predictions into predictors[] for later use | ||
| 190 : | */ | ||
| 191 : | Isibaar | 3 | |
| 192 : | edgomez | 982 | if (abs(pLeft[0] - pDiag[0]) < abs(pDiag[0] - pTop[0])) { |
| 193 : | edgomez | 1053 | *acpred_direction = 1; /* vertical */ |
| 194 : | edgomez | 851 | predictors[0] = DIV_DIV(pTop[0], iDcScaler); |
| 195 : | edgomez | 195 | for (i = 1; i < 8; i++) { |
| 196 : | Isibaar | 3 | predictors[i] = rescale(top_quant, current_quant, pTop[i]); |
| 197 : | } | ||
| 198 : | edgomez | 195 | } else { |
| 199 : | edgomez | 1053 | *acpred_direction = 2; /* horizontal */ |
| 200 : | edgomez | 851 | predictors[0] = DIV_DIV(pLeft[0], iDcScaler); |
| 201 : | edgomez | 195 | for (i = 1; i < 8; i++) { |
| 202 : | Isibaar | 3 | predictors[i] = rescale(left_quant, current_quant, pLeft[i + 7]); |
| 203 : | } | ||
| 204 : | } | ||
| 205 : | } | ||
| 206 : | |||
| 207 : | |||
| 208 : | /* decoder: add predictors to dct_codes[] and | ||
| 209 : | store current coeffs to pred_values[] for future prediction | ||
| 210 : | */ | ||
| 211 : | |||
| 212 : | |||
| 213 : | edgomez | 195 | void |
| 214 : | add_acdc(MACROBLOCK * pMB, | ||
| 215 : | uint32_t block, | ||
| 216 : | int16_t dct_codes[64], | ||
| 217 : | uint32_t iDcScaler, | ||
| 218 : | int16_t predictors[8]) | ||
| 219 : | Isibaar | 3 | { |
| 220 : | uint8_t acpred_direction = pMB->acpred_directions[block]; | ||
| 221 : | edgomez | 195 | int16_t *pCurrent = pMB->pred_values[block]; |
| 222 : | Isibaar | 3 | uint32_t i; |
| 223 : | |||
| 224 : | edgomez | 1038 | DPRINTF(XVID_DEBUG_COEFF,"predictor[0] %i\n", predictors[0]); |
| 225 : | suxen_drol | 252 | |
| 226 : | edgomez | 1053 | dct_codes[0] += predictors[0]; /* dc prediction */ |
| 227 : | edgomez | 851 | pCurrent[0] = dct_codes[0] * iDcScaler; |
| 228 : | Isibaar | 3 | |
| 229 : | edgomez | 195 | if (acpred_direction == 1) { |
| 230 : | for (i = 1; i < 8; i++) { | ||
| 231 : | Isibaar | 3 | int level = dct_codes[i] + predictors[i]; |
| 232 : | edgomez | 195 | |
| 233 : | edgomez | 1038 | DPRINTF(XVID_DEBUG_COEFF,"predictor[%i] %i\n",i, predictors[i]); |
| 234 : | suxen_drol | 252 | |
| 235 : | Isibaar | 3 | dct_codes[i] = level; |
| 236 : | pCurrent[i] = level; | ||
| 237 : | edgomez | 195 | pCurrent[i + 7] = dct_codes[i * 8]; |
| 238 : | Isibaar | 3 | } |
| 239 : | edgomez | 195 | } else if (acpred_direction == 2) { |
| 240 : | for (i = 1; i < 8; i++) { | ||
| 241 : | int level = dct_codes[i * 8] + predictors[i]; | ||
| 242 : | edgomez | 1038 | DPRINTF(XVID_DEBUG_COEFF,"predictor[%i] %i\n",i*8, predictors[i]); |
| 243 : | edgomez | 195 | |
| 244 : | dct_codes[i * 8] = level; | ||
| 245 : | pCurrent[i + 7] = level; | ||
| 246 : | Isibaar | 3 | pCurrent[i] = dct_codes[i]; |
| 247 : | } | ||
| 248 : | edgomez | 195 | } else { |
| 249 : | for (i = 1; i < 8; i++) { | ||
| 250 : | Isibaar | 3 | pCurrent[i] = dct_codes[i]; |
| 251 : | edgomez | 195 | pCurrent[i + 7] = dct_codes[i * 8]; |
| 252 : | Isibaar | 3 | } |
| 253 : | } | ||
| 254 : | } | ||
| 255 : | |||
| 256 : | |||
| 257 : | |||
| 258 : | edgomez | 1053 | /***************************************************************************** |
| 259 : | ****************************************************************************/ | ||
| 260 : | Isibaar | 3 | |
| 261 : | /* encoder: subtract predictors from qcoeff[] and calculate S1/S2 | ||
| 262 : | |||
| 263 : | edgomez | 851 | returns sum of coeefficients *saved* if prediction is enabled |
| 264 : | |||
| 265 : | edgomez | 78 | S1 = sum of all (qcoeff - prediction) |
| 266 : | S2 = sum of all qcoeff | ||
| 267 : | */ | ||
| 268 : | Isibaar | 3 | |
| 269 : | edgomez | 851 | int |
| 270 : | calc_acdc_coeff(MACROBLOCK * pMB, | ||
| 271 : | edgomez | 195 | uint32_t block, |
| 272 : | int16_t qcoeff[64], | ||
| 273 : | uint32_t iDcScaler, | ||
| 274 : | int16_t predictors[8]) | ||
| 275 : | Isibaar | 3 | { |
| 276 : | edgomez | 195 | int16_t *pCurrent = pMB->pred_values[block]; |
| 277 : | Isibaar | 3 | uint32_t i; |
| 278 : | edgomez | 851 | int S1 = 0, S2 = 0; |
| 279 : | Isibaar | 3 | |
| 280 : | |||
| 281 : | /* store current coeffs to pred_values[] for future prediction */ | ||
| 282 : | |||
| 283 : | edgomez | 851 | pCurrent[0] = qcoeff[0] * iDcScaler; |
| 284 : | edgomez | 195 | for (i = 1; i < 8; i++) { |
| 285 : | Isibaar | 3 | pCurrent[i] = qcoeff[i]; |
| 286 : | pCurrent[i + 7] = qcoeff[i * 8]; | ||
| 287 : | edgomez | 78 | } |
| 288 : | Isibaar | 3 | |
| 289 : | /* subtract predictors and store back in predictors[] */ | ||
| 290 : | |||
| 291 : | qcoeff[0] = qcoeff[0] - predictors[0]; | ||
| 292 : | |||
| 293 : | edgomez | 195 | if (pMB->acpred_directions[block] == 1) { |
| 294 : | for (i = 1; i < 8; i++) { | ||
| 295 : | Isibaar | 3 | int16_t level; |
| 296 : | |||
| 297 : | level = qcoeff[i]; | ||
| 298 : | edgomez | 982 | S2 += abs(level); |
| 299 : | Isibaar | 3 | level -= predictors[i]; |
| 300 : | edgomez | 982 | S1 += abs(level); |
| 301 : | Isibaar | 3 | predictors[i] = level; |
| 302 : | } | ||
| 303 : | edgomez | 1053 | } else /* acpred_direction == 2 */ |
| 304 : | Isibaar | 3 | { |
| 305 : | edgomez | 195 | for (i = 1; i < 8; i++) { |
| 306 : | Isibaar | 3 | int16_t level; |
| 307 : | |||
| 308 : | edgomez | 195 | level = qcoeff[i * 8]; |
| 309 : | edgomez | 982 | S2 += abs(level); |
| 310 : | Isibaar | 3 | level -= predictors[i]; |
| 311 : | edgomez | 982 | S1 += abs(level); |
| 312 : | Isibaar | 3 | predictors[i] = level; |
| 313 : | } | ||
| 314 : | |||
| 315 : | edgomez | 78 | } |
| 316 : | Isibaar | 3 | |
| 317 : | edgomez | 195 | |
| 318 : | edgomez | 78 | return S2 - S1; |
| 319 : | Isibaar | 3 | } |
| 320 : | |||
| 321 : | |||
| 322 : | edgomez | 851 | |
| 323 : | /* returns the bits *saved* if prediction is enabled */ | ||
| 324 : | |||
| 325 : | int | ||
| 326 : | calc_acdc_bits(MACROBLOCK * pMB, | ||
| 327 : | uint32_t block, | ||
| 328 : | int16_t qcoeff[64], | ||
| 329 : | uint32_t iDcScaler, | ||
| 330 : | int16_t predictors[8]) | ||
| 331 : | { | ||
| 332 : | const int direction = pMB->acpred_directions[block]; | ||
| 333 : | int16_t *pCurrent = pMB->pred_values[block]; | ||
| 334 : | int16_t tmp[8]; | ||
| 335 : | unsigned int i; | ||
| 336 : | int Z1, Z2; | ||
| 337 : | |||
| 338 : | /* store current coeffs to pred_values[] for future prediction */ | ||
| 339 : | pCurrent[0] = qcoeff[0] * iDcScaler; | ||
| 340 : | for (i = 1; i < 8; i++) { | ||
| 341 : | pCurrent[i] = qcoeff[i]; | ||
| 342 : | pCurrent[i + 7] = qcoeff[i * 8]; | ||
| 343 : | } | ||
| 344 : | |||
| 345 : | |||
| 346 : | /* dc prediction */ | ||
| 347 : | qcoeff[0] = qcoeff[0] - predictors[0]; | ||
| 348 : | |||
| 349 : | /* calc cost before ac prediction */ | ||
| 350 : | #ifdef BIGLUT | ||
| 351 : | Z2 = CodeCoeff_CalcBits(qcoeff, intra_table, scan_tables[0], 1); | ||
| 352 : | #else | ||
| 353 : | Z2 = CodeCoeffIntra_CalcBits(qcoeff, scan_tables[0]); | ||
| 354 : | #endif | ||
| 355 : | |||
| 356 : | /* apply ac prediction & calc cost*/ | ||
| 357 : | if (direction == 1) { | ||
| 358 : | for (i = 1; i < 8; i++) { | ||
| 359 : | tmp[i] = qcoeff[i]; | ||
| 360 : | qcoeff[i] -= predictors[i]; | ||
| 361 : | predictors[i] = qcoeff[i]; | ||
| 362 : | } | ||
| 363 : | edgomez | 1053 | }else{ /* acpred_direction == 2 */ |
| 364 : | edgomez | 851 | for (i = 1; i < 8; i++) { |
| 365 : | tmp[i] = qcoeff[i*8]; | ||
| 366 : | qcoeff[i*8] -= predictors[i]; | ||
| 367 : | predictors[i] = qcoeff[i*8]; | ||
| 368 : | } | ||
| 369 : | } | ||
| 370 : | |||
| 371 : | #ifdef BIGLUT | ||
| 372 : | Z1 = CodeCoeff_CalcBits(qcoeff, intra_table, scan_tables[direction], 1); | ||
| 373 : | #else | ||
| 374 : | Z1 = CodeCoeffIntra_CalcBits(qcoeff, scan_tables[direction]); | ||
| 375 : | #endif | ||
| 376 : | |||
| 377 : | /* undo prediction */ | ||
| 378 : | if (direction == 1) { | ||
| 379 : | for (i = 1; i < 8; i++) | ||
| 380 : | qcoeff[i] = tmp[i]; | ||
| 381 : | edgomez | 1053 | }else{ /* acpred_direction == 2 */ |
| 382 : | edgomez | 851 | for (i = 1; i < 8; i++) |
| 383 : | qcoeff[i*8] = tmp[i]; | ||
| 384 : | } | ||
| 385 : | |||
| 386 : | return Z2-Z1; | ||
| 387 : | } | ||
| 388 : | |||
| 389 : | Isibaar | 3 | /* apply predictors[] to qcoeff */ |
| 390 : | |||
| 391 : | edgomez | 195 | void |
| 392 : | apply_acdc(MACROBLOCK * pMB, | ||
| 393 : | uint32_t block, | ||
| 394 : | int16_t qcoeff[64], | ||
| 395 : | int16_t predictors[8]) | ||
| 396 : | Isibaar | 3 | { |
| 397 : | edgomez | 851 | unsigned int i; |
| 398 : | Isibaar | 3 | |
| 399 : | edgomez | 195 | if (pMB->acpred_directions[block] == 1) { |
| 400 : | edgomez | 851 | for (i = 1; i < 8; i++) |
| 401 : | Isibaar | 3 | qcoeff[i] = predictors[i]; |
| 402 : | edgomez | 195 | } else { |
| 403 : | edgomez | 851 | for (i = 1; i < 8; i++) |
| 404 : | edgomez | 195 | qcoeff[i * 8] = predictors[i]; |
| 405 : | edgomez | 78 | } |
| 406 : | Isibaar | 3 | } |
| 407 : | |||
| 408 : | |||
| 409 : | edgomez | 195 | void |
| 410 : | MBPrediction(FRAMEINFO * frame, | ||
| 411 : | uint32_t x, | ||
| 412 : | uint32_t y, | ||
| 413 : | uint32_t mb_width, | ||
| 414 : | int16_t qcoeff[6 * 64]) | ||
| 415 : | Isibaar | 3 | { |
| 416 : | edgomez | 78 | |
| 417 : | int32_t j; | ||
| 418 : | suxen_drol | 926 | int32_t iDcScaler, iQuant; |
| 419 : | edgomez | 851 | int S = 0; |
| 420 : | Isibaar | 3 | int16_t predictors[6][8]; |
| 421 : | |||
| 422 : | suxen_drol | 136 | MACROBLOCK *pMB = &frame->mbs[x + y * mb_width]; |
| 423 : | suxen_drol | 926 | iQuant = pMB->quant; |
| 424 : | Isibaar | 3 | |
| 425 : | edgomez | 78 | if ((pMB->mode == MODE_INTRA) || (pMB->mode == MODE_INTRA_Q)) { |
| 426 : | edgomez | 195 | |
| 427 : | for (j = 0; j < 6; j++) { | ||
| 428 : | edgomez | 851 | iDcScaler = get_dc_scaler(iQuant, j<4); |
| 429 : | Isibaar | 3 | |
| 430 : | edgomez | 195 | predict_acdc(frame->mbs, x, y, mb_width, j, &qcoeff[j * 64], |
| 431 : | suxen_drol | 252 | iQuant, iDcScaler, predictors[j], 0); |
| 432 : | edgomez | 78 | |
| 433 : | edgomez | 949 | if ((frame->vop_flags & XVID_VOP_HQACPRED)) |
| 434 : | edgomez | 851 | S += calc_acdc_bits(pMB, j, &qcoeff[j * 64], iDcScaler, predictors[j]); |
| 435 : | else | ||
| 436 : | S += calc_acdc_coeff(pMB, j, &qcoeff[j * 64], iDcScaler, predictors[j]); | ||
| 437 : | edgomez | 78 | |
| 438 : | Isibaar | 3 | } |
| 439 : | |||
| 440 : | edgomez | 1053 | if (S<=0) { /* dont predict */ |
| 441 : | edgomez | 851 | for (j = 0; j < 6; j++) |
| 442 : | Isibaar | 3 | pMB->acpred_directions[j] = 0; |
| 443 : | edgomez | 851 | }else{ |
| 444 : | for (j = 0; j < 6; j++) | ||
| 445 : | edgomez | 195 | apply_acdc(pMB, j, &qcoeff[j * 64], predictors[j]); |
| 446 : | Isibaar | 3 | } |
| 447 : | edgomez | 851 | |
| 448 : | Isibaar | 3 | pMB->cbp = calc_cbp(qcoeff); |
| 449 : | } | ||
| 450 : | edgomez | 1142 | } |
| 451 : | edgomez | 78 | |
| 452 : | edgomez | 1142 | static const VECTOR zeroMV = { 0, 0 }; |
| 453 : | |||
| 454 : | VECTOR | ||
| 455 : | get_pmv2(const MACROBLOCK * const mbs, | ||
| 456 : | const int mb_width, | ||
| 457 : | const int bound, | ||
| 458 : | const int x, | ||
| 459 : | const int y, | ||
| 460 : | const int block) | ||
| 461 : | { | ||
| 462 : | int lx, ly, lz; /* left */ | ||
| 463 : | int tx, ty, tz; /* top */ | ||
| 464 : | int rx, ry, rz; /* top-right */ | ||
| 465 : | int lpos, tpos, rpos; | ||
| 466 : | int num_cand = 0, last_cand = 1; | ||
| 467 : | |||
| 468 : | VECTOR pmv[4]; /* left neighbour, top neighbour, top-right neighbour */ | ||
| 469 : | |||
| 470 : | switch (block) { | ||
| 471 : | case 0: | ||
| 472 : | lx = x - 1; ly = y; lz = 1; | ||
| 473 : | tx = x; ty = y - 1; tz = 2; | ||
| 474 : | rx = x + 1; ry = y - 1; rz = 2; | ||
| 475 : | break; | ||
| 476 : | case 1: | ||
| 477 : | lx = x; ly = y; lz = 0; | ||
| 478 : | tx = x; ty = y - 1; tz = 3; | ||
| 479 : | rx = x + 1; ry = y - 1; rz = 2; | ||
| 480 : | break; | ||
| 481 : | case 2: | ||
| 482 : | lx = x - 1; ly = y; lz = 3; | ||
| 483 : | tx = x; ty = y; tz = 0; | ||
| 484 : | rx = x; ry = y; rz = 1; | ||
| 485 : | break; | ||
| 486 : | default: | ||
| 487 : | lx = x; ly = y; lz = 2; | ||
| 488 : | tx = x; ty = y; tz = 0; | ||
| 489 : | rx = x; ry = y; rz = 1; | ||
| 490 : | } | ||
| 491 : | |||
| 492 : | lpos = lx + ly * mb_width; | ||
| 493 : | rpos = rx + ry * mb_width; | ||
| 494 : | tpos = tx + ty * mb_width; | ||
| 495 : | |||
| 496 : | if (lpos >= bound && lx >= 0) { | ||
| 497 : | num_cand++; | ||
| 498 : | pmv[1] = mbs[lpos].mvs[lz]; | ||
| 499 : | } else pmv[1] = zeroMV; | ||
| 500 : | |||
| 501 : | if (tpos >= bound) { | ||
| 502 : | num_cand++; | ||
| 503 : | last_cand = 2; | ||
| 504 : | pmv[2] = mbs[tpos].mvs[tz]; | ||
| 505 : | } else pmv[2] = zeroMV; | ||
| 506 : | |||
| 507 : | if (rpos >= bound && rx < mb_width) { | ||
| 508 : | num_cand++; | ||
| 509 : | last_cand = 3; | ||
| 510 : | pmv[3] = mbs[rpos].mvs[rz]; | ||
| 511 : | } else pmv[3] = zeroMV; | ||
| 512 : | |||
| 513 : | /* If there're more than one candidate, we return the median vector */ | ||
| 514 : | |||
| 515 : | if (num_cand > 1) { | ||
| 516 : | /* set median */ | ||
| 517 : | pmv[0].x = | ||
| 518 : | MIN(MAX(pmv[1].x, pmv[2].x), | ||
| 519 : | MIN(MAX(pmv[2].x, pmv[3].x), MAX(pmv[1].x, pmv[3].x))); | ||
| 520 : | pmv[0].y = | ||
| 521 : | MIN(MAX(pmv[1].y, pmv[2].y), | ||
| 522 : | MIN(MAX(pmv[2].y, pmv[3].y), MAX(pmv[1].y, pmv[3].y))); | ||
| 523 : | return pmv[0]; | ||
| 524 : | } | ||
| 525 : | |||
| 526 : | return pmv[last_cand]; /* no point calculating median mv */ | ||
| 527 : | Isibaar | 3 | } |
| 528 : | edgomez | 1142 | |
| 529 : | VECTOR | ||
| 530 : | get_qpmv2(const MACROBLOCK * const mbs, | ||
| 531 : | const int mb_width, | ||
| 532 : | const int bound, | ||
| 533 : | const int x, | ||
| 534 : | const int y, | ||
| 535 : | const int block) | ||
| 536 : | { | ||
| 537 : | int lx, ly, lz; /* left */ | ||
| 538 : | int tx, ty, tz; /* top */ | ||
| 539 : | int rx, ry, rz; /* top-right */ | ||
| 540 : | int lpos, tpos, rpos; | ||
| 541 : | int num_cand = 0, last_cand = 1; | ||
| 542 : | |||
| 543 : | VECTOR pmv[4]; /* left neighbour, top neighbour, top-right neighbour */ | ||
| 544 : | |||
| 545 : | switch (block) { | ||
| 546 : | case 0: | ||
| 547 : | lx = x - 1; ly = y; lz = 1; | ||
| 548 : | tx = x; ty = y - 1; tz = 2; | ||
| 549 : | rx = x + 1; ry = y - 1; rz = 2; | ||
| 550 : | break; | ||
| 551 : | case 1: | ||
| 552 : | lx = x; ly = y; lz = 0; | ||
| 553 : | tx = x; ty = y - 1; tz = 3; | ||
| 554 : | rx = x + 1; ry = y - 1; rz = 2; | ||
| 555 : | break; | ||
| 556 : | case 2: | ||
| 557 : | lx = x - 1; ly = y; lz = 3; | ||
| 558 : | tx = x; ty = y; tz = 0; | ||
| 559 : | rx = x; ry = y; rz = 1; | ||
| 560 : | break; | ||
| 561 : | default: | ||
| 562 : | lx = x; ly = y; lz = 2; | ||
| 563 : | tx = x; ty = y; tz = 0; | ||
| 564 : | rx = x; ry = y; rz = 1; | ||
| 565 : | } | ||
| 566 : | |||
| 567 : | lpos = lx + ly * mb_width; | ||
| 568 : | rpos = rx + ry * mb_width; | ||
| 569 : | tpos = tx + ty * mb_width; | ||
| 570 : | |||
| 571 : | if (lpos >= bound && lx >= 0) { | ||
| 572 : | num_cand++; | ||
| 573 : | pmv[1] = mbs[lpos].qmvs[lz]; | ||
| 574 : | } else pmv[1] = zeroMV; | ||
| 575 : | |||
| 576 : | if (tpos >= bound) { | ||
| 577 : | num_cand++; | ||
| 578 : | last_cand = 2; | ||
| 579 : | pmv[2] = mbs[tpos].qmvs[tz]; | ||
| 580 : | } else pmv[2] = zeroMV; | ||
| 581 : | |||
| 582 : | if (rpos >= bound && rx < mb_width) { | ||
| 583 : | num_cand++; | ||
| 584 : | last_cand = 3; | ||
| 585 : | pmv[3] = mbs[rpos].qmvs[rz]; | ||
| 586 : | } else pmv[3] = zeroMV; | ||
| 587 : | |||
| 588 : | /* If there're more than one candidate, we return the median vector */ | ||
| 589 : | |||
| 590 : | if (num_cand > 1) { | ||
| 591 : | /* set median */ | ||
| 592 : | pmv[0].x = | ||
| 593 : | MIN(MAX(pmv[1].x, pmv[2].x), | ||
| 594 : | MIN(MAX(pmv[2].x, pmv[3].x), MAX(pmv[1].x, pmv[3].x))); | ||
| 595 : | pmv[0].y = | ||
| 596 : | MIN(MAX(pmv[1].y, pmv[2].y), | ||
| 597 : | MIN(MAX(pmv[2].y, pmv[3].y), MAX(pmv[1].y, pmv[3].y))); | ||
| 598 : | return pmv[0]; | ||
| 599 : | } | ||
| 600 : | |||
| 601 : | return pmv[last_cand]; /* no point calculating median mv */ | ||
| 602 : | } |
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