libavcodec/vc1dsp.c

   1 /*
   2  * VC-1 and WMV3 decoder - DSP functions
   3  * Copyright (c) 2006 Konstantin Shishkov
   4  *
   5  * This file is part of FFmpeg.
   6  *
   7  * FFmpeg is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * FFmpeg is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with FFmpeg; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 /**
  23 * @file libavcodec/vc1dsp.c
  24  * VC-1 and WMV3 decoder
  25  *
  26  */
  27
  28 #include "dsputil.h"
  29
  30
  31 /** Apply overlap transform to horizontal edge
  32 */
  33 static void vc1_v_overlap_c(uint8_t* src, int stride)
  34 {
  35     int i;
  36     int a, b, c, d;
  37     int d1, d2;
  38     int rnd = 1;
  39     for(i = 0; i < 8; i++) {
  40         a = src[-2*stride];
  41         b = src[-stride];
  42         c = src[0];
  43         d = src[stride];
  44         d1 = (a - d + 3 + rnd) >> 3;
  45         d2 = (a - d + b - c + 4 - rnd) >> 3;
  46
  47         src[-2*stride] = a - d1;
  48         src[-stride] = av_clip_uint8(b - d2);
  49         src[0] = av_clip_uint8(c + d2);
  50         src[stride] = d + d1;
  51         src++;
  52         rnd = !rnd;
  53     }
  54 }
  55
  56 /** Apply overlap transform to vertical edge
  57 */
  58 static void vc1_h_overlap_c(uint8_t* src, int stride)
  59 {
  60     int i;
  61     int a, b, c, d;
  62     int d1, d2;
  63     int rnd = 1;
  64     for(i = 0; i < 8; i++) {
  65         a = src[-2];
  66         b = src[-1];
  67         c = src[0];
  68         d = src[1];
  69         d1 = (a - d + 3 + rnd) >> 3;
  70         d2 = (a - d + b - c + 4 - rnd) >> 3;
  71
  72         src[-2] = a - d1;
  73         src[-1] = av_clip_uint8(b - d2);
  74         src[0] = av_clip_uint8(c + d2);
  75         src[1] = d + d1;
  76         src += stride;
  77         rnd = !rnd;
  78     }
  79 }
  80
  81
  82 /** Do inverse transform on 8x8 block
  83 */
  84 static void vc1_inv_trans_8x8_c(DCTELEM block[64])
  85 {
  86     int i;
  87     register int t1,t2,t3,t4,t5,t6,t7,t8;
  88     DCTELEM *src, *dst;
  89
  90     src = block;
  91     dst = block;
  92     for(i = 0; i < 8; i++){
  93         t1 = 12 * (src[0] + src[4]) + 4;
  94         t2 = 12 * (src[0] - src[4]) + 4;
  95         t3 = 16 * src[2] +  6 * src[6];
  96         t4 =  6 * src[2] - 16 * src[6];
  97
  98         t5 = t1 + t3;
  99         t6 = t2 + t4;
 100         t7 = t2 - t4;
 101         t8 = t1 - t3;
 102
 103         t1 = 16 * src[1] + 15 * src[3] +  9 * src[5] +  4 * src[7];
 104         t2 = 15 * src[1] -  4 * src[3] - 16 * src[5] -  9 * src[7];
 105         t3 =  9 * src[1] - 16 * src[3] +  4 * src[5] + 15 * src[7];
 106         t4 =  4 * src[1] -  9 * src[3] + 15 * src[5] - 16 * src[7];
 107
 108         dst[0] = (t5 + t1) >> 3;
 109         dst[1] = (t6 + t2) >> 3;
 110         dst[2] = (t7 + t3) >> 3;
 111         dst[3] = (t8 + t4) >> 3;
 112         dst[4] = (t8 - t4) >> 3;
 113         dst[5] = (t7 - t3) >> 3;
 114         dst[6] = (t6 - t2) >> 3;
 115         dst[7] = (t5 - t1) >> 3;
 116
 117         src += 8;
 118         dst += 8;
 119     }
 120
 121     src = block;
 122     dst = block;
 123     for(i = 0; i < 8; i++){
 124         t1 = 12 * (src[ 0] + src[32]) + 64;
 125         t2 = 12 * (src[ 0] - src[32]) + 64;
 126         t3 = 16 * src[16] +  6 * src[48];
 127         t4 =  6 * src[16] - 16 * src[48];
 128
 129         t5 = t1 + t3;
 130         t6 = t2 + t4;
 131         t7 = t2 - t4;
 132         t8 = t1 - t3;
 133
 134         t1 = 16 * src[ 8] + 15 * src[24] +  9 * src[40] +  4 * src[56];
 135         t2 = 15 * src[ 8] -  4 * src[24] - 16 * src[40] -  9 * src[56];
 136         t3 =  9 * src[ 8] - 16 * src[24] +  4 * src[40] + 15 * src[56];
 137         t4 =  4 * src[ 8] -  9 * src[24] + 15 * src[40] - 16 * src[56];
 138
 139         dst[ 0] = (t5 + t1) >> 7;
 140         dst[ 8] = (t6 + t2) >> 7;
 141         dst[16] = (t7 + t3) >> 7;
 142         dst[24] = (t8 + t4) >> 7;
 143         dst[32] = (t8 - t4 + 1) >> 7;
 144         dst[40] = (t7 - t3 + 1) >> 7;
 145         dst[48] = (t6 - t2 + 1) >> 7;
 146         dst[56] = (t5 - t1 + 1) >> 7;
 147
 148         src++;
 149         dst++;
 150     }
 151 }
 152
 153 /** Do inverse transform on 8x4 part of block
 154 */
 155 static void vc1_inv_trans_8x4_c(uint8_t *dest, int linesize, DCTELEM *block)
 156 {
 157     int i;
 158     register int t1,t2,t3,t4,t5,t6,t7,t8;
 159     DCTELEM *src, *dst;
 160     const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
 161
 162     src = block;
 163     dst = block;
 164     for(i = 0; i < 4; i++){
 165         t1 = 12 * (src[0] + src[4]) + 4;
 166         t2 = 12 * (src[0] - src[4]) + 4;
 167         t3 = 16 * src[2] +  6 * src[6];
 168         t4 =  6 * src[2] - 16 * src[6];
 169
 170         t5 = t1 + t3;
 171         t6 = t2 + t4;
 172         t7 = t2 - t4;
 173         t8 = t1 - t3;
 174
 175         t1 = 16 * src[1] + 15 * src[3] +  9 * src[5] +  4 * src[7];
 176         t2 = 15 * src[1] -  4 * src[3] - 16 * src[5] -  9 * src[7];
 177         t3 =  9 * src[1] - 16 * src[3] +  4 * src[5] + 15 * src[7];
 178         t4 =  4 * src[1] -  9 * src[3] + 15 * src[5] - 16 * src[7];
 179
 180         dst[0] = (t5 + t1) >> 3;
 181         dst[1] = (t6 + t2) >> 3;
 182         dst[2] = (t7 + t3) >> 3;
 183         dst[3] = (t8 + t4) >> 3;
 184         dst[4] = (t8 - t4) >> 3;
 185         dst[5] = (t7 - t3) >> 3;
 186         dst[6] = (t6 - t2) >> 3;
 187         dst[7] = (t5 - t1) >> 3;
 188
 189         src += 8;
 190         dst += 8;
 191     }
 192
 193     src = block;
 194     for(i = 0; i < 8; i++){
 195         t1 = 17 * (src[ 0] + src[16]) + 64;
 196         t2 = 17 * (src[ 0] - src[16]) + 64;
 197         t3 = 22 * src[ 8] + 10 * src[24];
 198         t4 = 22 * src[24] - 10 * src[ 8];
 199
 200         dest[0*linesize] = cm[dest[0*linesize] + ((t1 + t3) >> 7)];
 201         dest[1*linesize] = cm[dest[1*linesize] + ((t2 - t4) >> 7)];
 202         dest[2*linesize] = cm[dest[2*linesize] + ((t2 + t4) >> 7)];
 203         dest[3*linesize] = cm[dest[3*linesize] + ((t1 - t3) >> 7)];
 204
 205         src ++;
 206         dest++;
 207     }
 208 }
 209
 210 /** Do inverse transform on 4x8 parts of block
 211 */
 212 static void vc1_inv_trans_4x8_c(uint8_t *dest, int linesize, DCTELEM *block)
 213 {
 214     int i;
 215     register int t1,t2,t3,t4,t5,t6,t7,t8;
 216     DCTELEM *src, *dst;
 217     const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
 218
 219     src = block;
 220     dst = block;
 221     for(i = 0; i < 8; i++){
 222         t1 = 17 * (src[0] + src[2]) + 4;
 223         t2 = 17 * (src[0] - src[2]) + 4;
 224         t3 = 22 * src[1] + 10 * src[3];
 225         t4 = 22 * src[3] - 10 * src[1];
 226
 227         dst[0] = (t1 + t3) >> 3;
 228         dst[1] = (t2 - t4) >> 3;
 229         dst[2] = (t2 + t4) >> 3;
 230         dst[3] = (t1 - t3) >> 3;
 231
 232         src += 8;
 233         dst += 8;
 234     }
 235
 236     src = block;
 237     for(i = 0; i < 4; i++){
 238         t1 = 12 * (src[ 0] + src[32]) + 64;
 239         t2 = 12 * (src[ 0] - src[32]) + 64;
 240         t3 = 16 * src[16] +  6 * src[48];
 241         t4 =  6 * src[16] - 16 * src[48];
 242
 243         t5 = t1 + t3;
 244         t6 = t2 + t4;
 245         t7 = t2 - t4;
 246         t8 = t1 - t3;
 247
 248         t1 = 16 * src[ 8] + 15 * src[24] +  9 * src[40] +  4 * src[56];
 249         t2 = 15 * src[ 8] -  4 * src[24] - 16 * src[40] -  9 * src[56];
 250         t3 =  9 * src[ 8] - 16 * src[24] +  4 * src[40] + 15 * src[56];
 251         t4 =  4 * src[ 8] -  9 * src[24] + 15 * src[40] - 16 * src[56];
 252
 253         dest[0*linesize] = cm[dest[0*linesize] + ((t5 + t1) >> 7)];
 254         dest[1*linesize] = cm[dest[1*linesize] + ((t6 + t2) >> 7)];
 255         dest[2*linesize] = cm[dest[2*linesize] + ((t7 + t3) >> 7)];
 256         dest[3*linesize] = cm[dest[3*linesize] + ((t8 + t4) >> 7)];
 257         dest[4*linesize] = cm[dest[4*linesize] + ((t8 - t4 + 1) >> 7)];
 258         dest[5*linesize] = cm[dest[5*linesize] + ((t7 - t3 + 1) >> 7)];
 259         dest[6*linesize] = cm[dest[6*linesize] + ((t6 - t2 + 1) >> 7)];
 260         dest[7*linesize] = cm[dest[7*linesize] + ((t5 - t1 + 1) >> 7)];
 261
 262         src ++;
 263         dest++;
 264     }
 265 }
 266
 267 /** Do inverse transform on 4x4 part of block
 268 */
 269 static void vc1_inv_trans_4x4_c(uint8_t *dest, int linesize, DCTELEM *block)
 270 {
 271     int i;
 272     register int t1,t2,t3,t4;
 273     DCTELEM *src, *dst;
 274     const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
 275
 276     src = block;
 277     dst = block;
 278     for(i = 0; i < 4; i++){
 279         t1 = 17 * (src[0] + src[2]) + 4;
 280         t2 = 17 * (src[0] - src[2]) + 4;
 281         t3 = 22 * src[1] + 10 * src[3];
 282         t4 = 22 * src[3] - 10 * src[1];
 283
 284         dst[0] = (t1 + t3) >> 3;
 285         dst[1] = (t2 - t4) >> 3;
 286         dst[2] = (t2 + t4) >> 3;
 287         dst[3] = (t1 - t3) >> 3;
 288
 289         src += 8;
 290         dst += 8;
 291     }
 292
 293     src = block;
 294     for(i = 0; i < 4; i++){
 295         t1 = 17 * (src[ 0] + src[16]) + 64;
 296         t2 = 17 * (src[ 0] - src[16]) + 64;
 297         t3 = 22 * src[ 8] + 10 * src[24];
 298         t4 = 22 * src[24] - 10 * src[ 8];
 299
 300         dest[0*linesize] = cm[dest[0*linesize] + ((t1 + t3) >> 7)];
 301         dest[1*linesize] = cm[dest[1*linesize] + ((t2 - t4) >> 7)];
 302         dest[2*linesize] = cm[dest[2*linesize] + ((t2 + t4) >> 7)];
 303         dest[3*linesize] = cm[dest[3*linesize] + ((t1 - t3) >> 7)];
 304
 305         src ++;
 306         dest++;
 307     }
 308 }
 309
 310 /* motion compensation functions */
 311 /** Filter in case of 2 filters */
 312 #define VC1_MSPEL_FILTER_16B(DIR, TYPE)                                 \
 313 static av_always_inline int vc1_mspel_ ## DIR ## _filter_16bits(const TYPE *src, int stride, int mode) \
 314 {                                                                       \
 315     switch(mode){                                                       \
 316     case 0: /* no shift - should not occur */                           \
 317         return 0;                                                       \
 318     case 1: /* 1/4 shift */                                             \
 319         return -4*src[-stride] + 53*src[0] + 18*src[stride] - 3*src[stride*2]; \
 320     case 2: /* 1/2 shift */                                             \
 321         return -src[-stride] + 9*src[0] + 9*src[stride] - src[stride*2]; \
 322     case 3: /* 3/4 shift */                                             \
 323         return -3*src[-stride] + 18*src[0] + 53*src[stride] - 4*src[stride*2]; \
 324     }                                                                   \
 325     return 0; /* should not occur */                                    \
 326 }
 327
 328 VC1_MSPEL_FILTER_16B(ver, uint8_t);
 329 VC1_MSPEL_FILTER_16B(hor, int16_t);
 330
 331
 332 /** Filter used to interpolate fractional pel values
 333  */
 334 static av_always_inline int vc1_mspel_filter(const uint8_t *src, int stride, int mode, int r)
 335 {
 336     switch(mode){
 337     case 0: //no shift
 338         return src[0];
 339     case 1: // 1/4 shift
 340         return (-4*src[-stride] + 53*src[0] + 18*src[stride] - 3*src[stride*2] + 32 - r) >> 6;
 341     case 2: // 1/2 shift
 342         return (-src[-stride] + 9*src[0] + 9*src[stride] - src[stride*2] + 8 - r) >> 4;
 343     case 3: // 3/4 shift
 344         return (-3*src[-stride] + 18*src[0] + 53*src[stride] - 4*src[stride*2] + 32 - r) >> 6;
 345     }
 346     return 0; //should not occur
 347 }
 348
 349 /** Function used to do motion compensation with bicubic interpolation
 350  */
 351 static void vc1_mspel_mc(uint8_t *dst, const uint8_t *src, int stride, int hmode, int vmode, int rnd)
 352 {
 353     int     i, j;
 354
 355     if (vmode) { /* Horizontal filter to apply */
 356         int r;
 357
 358         if (hmode) { /* Vertical filter to apply, output to tmp */
 359             static const int shift_value[] = { 0, 5, 1, 5 };
 360             int              shift = (shift_value[hmode]+shift_value[vmode])>>1;
 361             int16_t          tmp[11*8], *tptr = tmp;
 362
 363             r = (1<<(shift-1)) + rnd-1;
 364
 365             src -= 1;
 366             for(j = 0; j < 8; j++) {
 367                 for(i = 0; i < 11; i++)
 368                     tptr[i] = (vc1_mspel_ver_filter_16bits(src + i, stride, vmode)+r)>>shift;
 369                 src += stride;
 370                 tptr += 11;
 371             }
 372
 373             r = 64-rnd;
 374             tptr = tmp+1;
 375             for(j = 0; j < 8; j++) {
 376                 for(i = 0; i < 8; i++)
 377                     dst[i] = av_clip_uint8((vc1_mspel_hor_filter_16bits(tptr + i, 1, hmode)+r)>>7);
 378                 dst += stride;
 379                 tptr += 11;
 380             }
 381
 382             return;
 383         }
 384         else { /* No horizontal filter, output 8 lines to dst */
 385             r = 1-rnd;
 386
 387             for(j = 0; j < 8; j++) {
 388                 for(i = 0; i < 8; i++)
 389                     dst[i] = av_clip_uint8(vc1_mspel_filter(src + i, stride, vmode, r));
 390                 src += stride;
 391                 dst += stride;
 392             }
 393             return;
 394         }
 395     }
 396
 397     /* Horizontal mode with no vertical mode */
 398     for(j = 0; j < 8; j++) {
 399         for(i = 0; i < 8; i++)
 400             dst[i] = av_clip_uint8(vc1_mspel_filter(src + i, 1, hmode, rnd));
 401         dst += stride;
 402         src += stride;
 403     }
 404 }
 405
 406 /* pixel functions - really are entry points to vc1_mspel_mc */
 407
 408 /* this one is defined in dsputil.c */
 409 void ff_put_vc1_mspel_mc00_c(uint8_t *dst, const uint8_t *src, int stride, int rnd);
 410
 411 #define PUT_VC1_MSPEL(a, b)\
 412 static void put_vc1_mspel_mc ## a ## b ##_c(uint8_t *dst, const uint8_t *src, int stride, int rnd) { \
 413      vc1_mspel_mc(dst, src, stride, a, b, rnd);                         \
 414 }
 415
 416 PUT_VC1_MSPEL(1, 0)
 417 PUT_VC1_MSPEL(2, 0)
 418 PUT_VC1_MSPEL(3, 0)
 419
 420 PUT_VC1_MSPEL(0, 1)
 421 PUT_VC1_MSPEL(1, 1)
 422 PUT_VC1_MSPEL(2, 1)
 423 PUT_VC1_MSPEL(3, 1)
 424
 425 PUT_VC1_MSPEL(0, 2)
 426 PUT_VC1_MSPEL(1, 2)
 427 PUT_VC1_MSPEL(2, 2)
 428 PUT_VC1_MSPEL(3, 2)
 429
 430 PUT_VC1_MSPEL(0, 3)
 431 PUT_VC1_MSPEL(1, 3)
 432 PUT_VC1_MSPEL(2, 3)
 433 PUT_VC1_MSPEL(3, 3)
 434
 435 void ff_vc1dsp_init(DSPContext* dsp, AVCodecContext *avctx) {
 436     dsp->vc1_inv_trans_8x8 = vc1_inv_trans_8x8_c;
 437     dsp->vc1_inv_trans_4x8 = vc1_inv_trans_4x8_c;
 438     dsp->vc1_inv_trans_8x4 = vc1_inv_trans_8x4_c;
 439     dsp->vc1_inv_trans_4x4 = vc1_inv_trans_4x4_c;
 440     dsp->vc1_h_overlap = vc1_h_overlap_c;
 441     dsp->vc1_v_overlap = vc1_v_overlap_c;
 442
 443     dsp->put_vc1_mspel_pixels_tab[ 0] = ff_put_vc1_mspel_mc00_c;
 444     dsp->put_vc1_mspel_pixels_tab[ 1] = put_vc1_mspel_mc10_c;
 445     dsp->put_vc1_mspel_pixels_tab[ 2] = put_vc1_mspel_mc20_c;
 446     dsp->put_vc1_mspel_pixels_tab[ 3] = put_vc1_mspel_mc30_c;
 447     dsp->put_vc1_mspel_pixels_tab[ 4] = put_vc1_mspel_mc01_c;
 448     dsp->put_vc1_mspel_pixels_tab[ 5] = put_vc1_mspel_mc11_c;
 449     dsp->put_vc1_mspel_pixels_tab[ 6] = put_vc1_mspel_mc21_c;
 450     dsp->put_vc1_mspel_pixels_tab[ 7] = put_vc1_mspel_mc31_c;
 451     dsp->put_vc1_mspel_pixels_tab[ 8] = put_vc1_mspel_mc02_c;
 452     dsp->put_vc1_mspel_pixels_tab[ 9] = put_vc1_mspel_mc12_c;
 453     dsp->put_vc1_mspel_pixels_tab[10] = put_vc1_mspel_mc22_c;
 454     dsp->put_vc1_mspel_pixels_tab[11] = put_vc1_mspel_mc32_c;
 455     dsp->put_vc1_mspel_pixels_tab[12] = put_vc1_mspel_mc03_c;
 456     dsp->put_vc1_mspel_pixels_tab[13] = put_vc1_mspel_mc13_c;
 457     dsp->put_vc1_mspel_pixels_tab[14] = put_vc1_mspel_mc23_c;
 458     dsp->put_vc1_mspel_pixels_tab[15] = put_vc1_mspel_mc33_c;
 459 }