libmpcodecs/vf_ivtc.c

   1 /*
   2  * This file is part of MPlayer.
   3  *
   4  * MPlayer is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * MPlayer is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  17  */
  18
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <string.h>
  22
  23 #include "config.h"
  24 #include "mp_msg.h"
  25 #include "cpudetect.h"
  26
  27 #include "img_format.h"
  28 #include "mp_image.h"
  29 #include "vf.h"
  30
  31 #include "libvo/fastmemcpy.h"
  32
  33
  34 struct metrics {
  35         /* difference: total, even lines, odd lines */
  36         int d, e, o;
  37         /* noise: temporal, spacial (current), spacial (past) */
  38         int t, s, p;
  39 };
  40
  41 struct frameinfo {
  42         /* peak, relative, mean */
  43         struct metrics p, r, m;
  44 };
  45
  46 struct vf_priv_s {
  47         struct frameinfo fi[2];
  48         mp_image_t *dmpi;
  49         int first;
  50         int drop, lastdrop, dropnext;
  51         int inframes, outframes;
  52         struct vf_detc_pts_buf ptsbuf;
  53 };
  54
  55 enum {
  56         F_DROP,
  57         F_MERGE,
  58         F_NEXT,
  59         F_SHOW
  60 };
  61
  62 #if HAVE_MMX && HAVE_EBX_AVAILABLE
  63 static void block_diffs_MMX(struct metrics *m, unsigned char *old, unsigned char *new, int os, int ns)
  64 {
  65         int i;
  66         short out[24]; // output buffer for the partial metrics from the mmx code
  67
  68         __asm__ (
  69                 "movl $4, %%ecx \n\t"
  70                 "pxor %%mm4, %%mm4 \n\t" // 4 even difference sums
  71                 "pxor %%mm5, %%mm5 \n\t" // 4 odd difference sums
  72                 "pxor %%mm7, %%mm7 \n\t" // all zeros
  73
  74                 ASMALIGN(4)
  75                 "1: \n\t"
  76
  77                 // Even difference
  78                 "movq (%%"REG_S"), %%mm0 \n\t"
  79                 "movq (%%"REG_S"), %%mm2 \n\t"
  80                 "add %%"REG_a", %%"REG_S" \n\t"
  81                 "movq (%%"REG_D"), %%mm1 \n\t"
  82                 "add %%"REG_b", %%"REG_D" \n\t"
  83                 "psubusb %%mm1, %%mm2 \n\t"
  84                 "psubusb %%mm0, %%mm1 \n\t"
  85                 "movq %%mm2, %%mm0 \n\t"
  86                 "movq %%mm1, %%mm3 \n\t"
  87                 "punpcklbw %%mm7, %%mm0 \n\t"
  88                 "punpcklbw %%mm7, %%mm1 \n\t"
  89                 "punpckhbw %%mm7, %%mm2 \n\t"
  90                 "punpckhbw %%mm7, %%mm3 \n\t"
  91                 "paddw %%mm0, %%mm4 \n\t"
  92                 "paddw %%mm1, %%mm4 \n\t"
  93                 "paddw %%mm2, %%mm4 \n\t"
  94                 "paddw %%mm3, %%mm4 \n\t"
  95
  96                 // Odd difference
  97                 "movq (%%"REG_S"), %%mm0 \n\t"
  98                 "movq (%%"REG_S"), %%mm2 \n\t"
  99                 "add %%"REG_a", %%"REG_S" \n\t"
 100                 "movq (%%"REG_D"), %%mm1 \n\t"
 101                 "add %%"REG_b", %%"REG_D" \n\t"
 102                 "psubusb %%mm1, %%mm2 \n\t"
 103                 "psubusb %%mm0, %%mm1 \n\t"
 104                 "movq %%mm2, %%mm0 \n\t"
 105                 "movq %%mm1, %%mm3 \n\t"
 106                 "punpcklbw %%mm7, %%mm0 \n\t"
 107                 "punpcklbw %%mm7, %%mm1 \n\t"
 108                 "punpckhbw %%mm7, %%mm2 \n\t"
 109                 "punpckhbw %%mm7, %%mm3 \n\t"
 110                 "paddw %%mm0, %%mm5 \n\t"
 111                 "paddw %%mm1, %%mm5 \n\t"
 112                 "paddw %%mm2, %%mm5 \n\t"
 113                 "paddw %%mm3, %%mm5 \n\t"
 114
 115                 "decl %%ecx \n\t"
 116                 "jnz 1b \n\t"
 117                 "movq %%mm4, (%%"REG_d") \n\t"
 118                 "movq %%mm5, 8(%%"REG_d") \n\t"
 119                 :
 120                 : "S" (old), "D" (new), "a" (os), "b" (ns), "d" (out)
 121                 : "memory"
 122                 );
 123         m->e = out[0]+out[1]+out[2]+out[3];
 124         m->o = out[4]+out[5]+out[6]+out[7];
 125         m->d = m->e + m->o;
 126
 127         __asm__ (
 128                 // First loop to measure first four columns
 129                 "movl $4, %%ecx \n\t"
 130                 "pxor %%mm4, %%mm4 \n\t" // Past spacial noise
 131                 "pxor %%mm5, %%mm5 \n\t" // Temporal noise
 132                 "pxor %%mm6, %%mm6 \n\t" // Current spacial noise
 133
 134                 ASMALIGN(4)
 135                 "2: \n\t"
 136
 137                 "movq (%%"REG_S"), %%mm0 \n\t"
 138                 "movq (%%"REG_S",%%"REG_a"), %%mm1 \n\t"
 139                 "add %%"REG_a", %%"REG_S" \n\t"
 140                 "add %%"REG_a", %%"REG_S" \n\t"
 141                 "movq (%%"REG_D"), %%mm2 \n\t"
 142                 "movq (%%"REG_D",%%"REG_b"), %%mm3 \n\t"
 143                 "add %%"REG_b", %%"REG_D" \n\t"
 144                 "add %%"REG_b", %%"REG_D" \n\t"
 145                 "punpcklbw %%mm7, %%mm0 \n\t"
 146                 "punpcklbw %%mm7, %%mm1 \n\t"
 147                 "punpcklbw %%mm7, %%mm2 \n\t"
 148                 "punpcklbw %%mm7, %%mm3 \n\t"
 149                 "paddw %%mm1, %%mm4 \n\t"
 150                 "paddw %%mm1, %%mm5 \n\t"
 151                 "paddw %%mm3, %%mm6 \n\t"
 152                 "psubw %%mm0, %%mm4 \n\t"
 153                 "psubw %%mm2, %%mm5 \n\t"
 154                 "psubw %%mm2, %%mm6 \n\t"
 155
 156                 "decl %%ecx \n\t"
 157                 "jnz 2b \n\t"
 158
 159                 "movq %%mm0, %%mm1 \n\t"
 160                 "movq %%mm0, %%mm2 \n\t"
 161                 "movq %%mm0, %%mm3 \n\t"
 162                 "pcmpgtw %%mm4, %%mm1 \n\t"
 163                 "pcmpgtw %%mm5, %%mm2 \n\t"
 164                 "pcmpgtw %%mm6, %%mm3 \n\t"
 165                 "pxor %%mm1, %%mm4 \n\t"
 166                 "pxor %%mm2, %%mm5 \n\t"
 167                 "pxor %%mm3, %%mm6 \n\t"
 168                 "psubw %%mm1, %%mm4 \n\t"
 169                 "psubw %%mm2, %%mm5 \n\t"
 170                 "psubw %%mm3, %%mm6 \n\t"
 171                 "movq %%mm4, (%%"REG_d") \n\t"
 172                 "movq %%mm5, 16(%%"REG_d") \n\t"
 173                 "movq %%mm6, 32(%%"REG_d") \n\t"
 174
 175                 "mov %%"REG_a", %%"REG_c" \n\t"
 176                 "shl $3, %%"REG_c" \n\t"
 177                 "sub %%"REG_c", %%"REG_S" \n\t"
 178                 "mov %%"REG_b", %%"REG_c" \n\t"
 179                 "shl $3, %%"REG_c" \n\t"
 180                 "sub %%"REG_c", %%"REG_D" \n\t"
 181
 182                 // Second loop for the last four columns
 183                 "movl $4, %%ecx \n\t"
 184                 "pxor %%mm4, %%mm4 \n\t"
 185                 "pxor %%mm5, %%mm5 \n\t"
 186                 "pxor %%mm6, %%mm6 \n\t"
 187
 188                 ASMALIGN(4)
 189                 "3: \n\t"
 190
 191                 "movq (%%"REG_S"), %%mm0 \n\t"
 192                 "movq (%%"REG_S",%%"REG_a"), %%mm1 \n\t"
 193                 "add %%"REG_a", %%"REG_S" \n\t"
 194                 "add %%"REG_a", %%"REG_S" \n\t"
 195                 "movq (%%"REG_D"), %%mm2 \n\t"
 196                 "movq (%%"REG_D",%%"REG_b"), %%mm3 \n\t"
 197                 "add %%"REG_b", %%"REG_D" \n\t"
 198                 "add %%"REG_b", %%"REG_D" \n\t"
 199                 "punpckhbw %%mm7, %%mm0 \n\t"
 200                 "punpckhbw %%mm7, %%mm1 \n\t"
 201                 "punpckhbw %%mm7, %%mm2 \n\t"
 202                 "punpckhbw %%mm7, %%mm3 \n\t"
 203                 "paddw %%mm1, %%mm4 \n\t"
 204                 "paddw %%mm1, %%mm5 \n\t"
 205                 "paddw %%mm3, %%mm6 \n\t"
 206                 "psubw %%mm0, %%mm4 \n\t"
 207                 "psubw %%mm2, %%mm5 \n\t"
 208                 "psubw %%mm2, %%mm6 \n\t"
 209
 210                 "decl %%ecx \n\t"
 211                 "jnz 3b \n\t"
 212
 213                 "movq %%mm0, %%mm1 \n\t"
 214                 "movq %%mm0, %%mm2 \n\t"
 215                 "movq %%mm0, %%mm3 \n\t"
 216                 "pcmpgtw %%mm4, %%mm1 \n\t"
 217                 "pcmpgtw %%mm5, %%mm2 \n\t"
 218                 "pcmpgtw %%mm6, %%mm3 \n\t"
 219                 "pxor %%mm1, %%mm4 \n\t"
 220                 "pxor %%mm2, %%mm5 \n\t"
 221                 "pxor %%mm3, %%mm6 \n\t"
 222                 "psubw %%mm1, %%mm4 \n\t"
 223                 "psubw %%mm2, %%mm5 \n\t"
 224                 "psubw %%mm3, %%mm6 \n\t"
 225                 "movq %%mm4, 8(%%"REG_d") \n\t"
 226                 "movq %%mm5, 24(%%"REG_d") \n\t"
 227                 "movq %%mm6, 40(%%"REG_d") \n\t"
 228
 229                 "emms \n\t"
 230                 :
 231                 : "S" (old), "D" (new), "a" ((long)os), "b" ((long)ns), "d" (out)
 232                 : "memory"
 233                 );
 234         m->p = m->t = m->s = 0;
 235         for (i=0; i<8; i++) {
 236                 m->p += out[i];
 237                 m->t += out[8+i];
 238                 m->s += out[16+i];
 239         }
 240         //printf("e=%d o=%d d=%d p=%d t=%d s=%d\n", m->e, m->o, m->d, m->p, m->t, m->s);
 241 }
 242 #endif
 243
 244 //#define MAG(a) ((a)*(a))
 245 //#define MAG(a) (abs(a))
 246 #define MAG(a) (((a)^((a)>>31))-((a)>>31))
 247
 248 //#define LOWPASS(s) (((s)[-2] + 4*(s)[-1] + 6*(s)[0] + 4*(s)[1] + (s)[2])>>4)
 249 //#define LOWPASS(s) (((s)[-1] + 2*(s)[0] + (s)[1])>>2)
 250 #define LOWPASS(s) ((s)[0])
 251
 252
 253 static void block_diffs_C(struct metrics *m, unsigned char *old, unsigned char *new, int os, int ns)
 254 {
 255         int x, y, e=0, o=0, s=0, p=0, t=0;
 256         unsigned char *oldp, *newp;
 257         m->s = m->p = m->t = 0;
 258         for (x = 8; x; x--) {
 259                 oldp = old++;
 260                 newp = new++;
 261                 s = p = t = 0;
 262                 for (y = 4; y; y--) {
 263                         e += MAG(newp[0]-oldp[0]);
 264                         o += MAG(newp[ns]-oldp[os]);
 265                         s += newp[ns]-newp[0];
 266                         p += oldp[os]-oldp[0];
 267                         t += oldp[os]-newp[0];
 268                         oldp += os<<1;
 269                         newp += ns<<1;
 270                 }
 271                 m->s += MAG(s);
 272                 m->p += MAG(p);
 273                 m->t += MAG(t);
 274         }
 275         m->e = e;
 276         m->o = o;
 277         m->d = e+o;
 278 }
 279
 280 static void (*block_diffs)(struct metrics *, unsigned char *, unsigned char *, int, int);
 281
 282 #define MAXUP(a,b) ((a) = ((a)>(b)) ? (a) : (b))
 283
 284 static void diff_planes(struct frameinfo *fi,
 285         unsigned char *old, unsigned char *new, int w, int h, int os, int ns)
 286 {
 287         int x, y;
 288         struct metrics l;
 289         struct metrics *peak=&fi->p, *rel=&fi->r, *mean=&fi->m;
 290         memset(peak, 0, sizeof(struct metrics));
 291         memset(rel, 0, sizeof(struct metrics));
 292         memset(mean, 0, sizeof(struct metrics));
 293         for (y = 0; y < h-7; y += 8) {
 294                 for (x = 8; x < w-8-7; x += 8) {
 295                         block_diffs(&l, old+x+y*os, new+x+y*ns, os, ns);
 296                         mean->d += l.d;
 297                         mean->e += l.e;
 298                         mean->o += l.o;
 299                         mean->s += l.s;
 300                         mean->p += l.p;
 301                         mean->t += l.t;
 302                         MAXUP(peak->d, l.d);
 303                         MAXUP(peak->e, l.e);
 304                         MAXUP(peak->o, l.o);
 305                         MAXUP(peak->s, l.s);
 306                         MAXUP(peak->p, l.p);
 307                         MAXUP(peak->t, l.t);
 308                         MAXUP(rel->e, l.e-l.o);
 309                         MAXUP(rel->o, l.o-l.e);
 310                         MAXUP(rel->s, l.s-l.t);
 311                         MAXUP(rel->p, l.p-l.t);
 312                         MAXUP(rel->t, l.t-l.p);
 313                         MAXUP(rel->d, l.t-l.s); /* hack */
 314                 }
 315         }
 316         x = (w/8-2)*(h/8);
 317         mean->d /= x;
 318         mean->e /= x;
 319         mean->o /= x;
 320         mean->s /= x;
 321         mean->p /= x;
 322         mean->t /= x;
 323 }
 324
 325 static void diff_fields(struct frameinfo *fi, mp_image_t *old, mp_image_t *new)
 326 {
 327         diff_planes(fi, old->planes[0], new->planes[0],
 328                 new->w, new->h, old->stride[0], new->stride[0]);
 329 }
 330
 331 static void stats(struct frameinfo *f)
 332 {
 333         mp_msg(MSGT_VFILTER, MSGL_V, "       pd=%d re=%d ro=%d rp=%d rt=%d rs=%d rd=%d pp=%d pt=%d ps=%d\r",
 334                 f->p.d, f->r.e, f->r.o, f->r.p, f->r.t, f->r.s, f->r.d, f->p.p, f->p.t, f->p.s);
 335 }
 336
 337 static int foo(struct vf_priv_s *p, mp_image_t *new, mp_image_t *cur)
 338 {
 339         struct frameinfo *f = p->fi;
 340
 341         f[0] = f[1];
 342         diff_fields(&f[1], cur, new);
 343         stats(&f[1]);
 344
 345         // Immediately drop this frame if it's already been used.
 346         if (p->dropnext) {
 347                 p->dropnext = 0;
 348                 return F_DROP;
 349         }
 350
 351         // Sometimes a pulldown frame comes all by itself, so both
 352         // its top and bottom field are duplicates from the adjacent
 353         // two frames. We can just drop such a frame, but we
 354         // immediately show the next frame instead to keep the frame
 355         // drops evenly spaced during normal 3:2 pulldown sequences.
 356         if ((3*f[1].r.o < f[1].r.e) && (f[1].r.s < f[1].r.d)) {
 357                 p->dropnext = 1;
 358                 return F_NEXT;
 359         }
 360
 361         // If none of these conditions hold, we will consider the frame
 362         // progressive and just show it as-is.
 363         if (!(  (3*f[0].r.e < f[0].r.o) ||
 364                 ((2*f[0].r.d < f[0].r.s) && (f[0].r.s > 1200)) ||
 365                 ((2*f[1].r.t < f[1].r.p) && (f[1].r.p > 1200))  ))
 366                 return F_SHOW;
 367
 368         // Otherwise, we have to decide whether to merge or drop.
 369         // If the noise metric only increases minimally, we're off
 370         // to a good start...
 371         if (((2*f[1].r.t < 3*f[1].r.p) && (f[1].r.t < 3600)) ||
 372                 (f[1].r.t < 900) || (f[1].r.d < 900)) {
 373                 // ...and if noise decreases or the duplicate even field
 374                 // is detected, we go ahead with the merge.
 375                 if ((3*f[0].r.e < f[0].r.o) || (2*f[1].r.t < f[1].r.p)) {
 376                         p->dropnext = 1;
 377                         return F_MERGE;
 378                 }
 379         }
 380         return F_DROP;
 381 }
 382
 383
 384
 385 static void copy_image(mp_image_t *dmpi, mp_image_t *mpi, int field)
 386 {
 387         switch (field) {
 388         case 0:
 389                 my_memcpy_pic(dmpi->planes[0], mpi->planes[0], mpi->w, mpi->h/2,
 390                         dmpi->stride[0]*2, mpi->stride[0]*2);
 391                 if (mpi->flags & MP_IMGFLAG_PLANAR) {
 392                         my_memcpy_pic(dmpi->planes[1], mpi->planes[1],
 393                                 mpi->chroma_width, mpi->chroma_height/2,
 394                                 dmpi->stride[1]*2, mpi->stride[1]*2);
 395                         my_memcpy_pic(dmpi->planes[2], mpi->planes[2],
 396                                 mpi->chroma_width, mpi->chroma_height/2,
 397                                 dmpi->stride[2]*2, mpi->stride[2]*2);
 398                 }
 399                 break;
 400         case 1:
 401                 my_memcpy_pic(dmpi->planes[0]+dmpi->stride[0],
 402                         mpi->planes[0]+mpi->stride[0], mpi->w, mpi->h/2,
 403                         dmpi->stride[0]*2, mpi->stride[0]*2);
 404                 if (mpi->flags & MP_IMGFLAG_PLANAR) {
 405                         my_memcpy_pic(dmpi->planes[1]+dmpi->stride[1],
 406                                 mpi->planes[1]+mpi->stride[1],
 407                                 mpi->chroma_width, mpi->chroma_height/2,
 408                                 dmpi->stride[1]*2, mpi->stride[1]*2);
 409                         my_memcpy_pic(dmpi->planes[2]+dmpi->stride[2],
 410                                 mpi->planes[2]+mpi->stride[2],
 411                                 mpi->chroma_width, mpi->chroma_height/2,
 412                                 dmpi->stride[2]*2, mpi->stride[2]*2);
 413                 }
 414                 break;
 415         case 2:
 416                 memcpy_pic(dmpi->planes[0], mpi->planes[0], mpi->w, mpi->h,
 417                         dmpi->stride[0], mpi->stride[0]);
 418                 if (mpi->flags & MP_IMGFLAG_PLANAR) {
 419                         memcpy_pic(dmpi->planes[1], mpi->planes[1],
 420                                 mpi->chroma_width, mpi->chroma_height,
 421                                 dmpi->stride[1], mpi->stride[1]);
 422                         memcpy_pic(dmpi->planes[2], mpi->planes[2],
 423                                 mpi->chroma_width, mpi->chroma_height,
 424                                 dmpi->stride[2], mpi->stride[2]);
 425                 }
 426                 break;
 427         }
 428 }
 429
 430 static int do_put_image(struct vf_instance *vf, mp_image_t *dmpi, double pts)
 431 {
 432         struct vf_priv_s *p = vf->priv;
 433         int dropflag=0;
 434
 435         if (!p->dropnext) switch (p->drop) {
 436         case 0:
 437                 dropflag = 0;
 438                 break;
 439         case 1:
 440                 dropflag = (++p->lastdrop >= 5);
 441                 break;
 442         case 2:
 443                 dropflag = (++p->lastdrop >= 5) && (4*p->inframes <= 5*p->outframes);
 444                 break;
 445         }
 446
 447         if (dropflag) {
 448                 //mp_msg(MSGT_VFILTER, MSGL_V, "drop! [%d/%d=%g]\n",
 449                 //      p->outframes, p->inframes, (float)p->outframes/p->inframes);
 450                 mp_msg(MSGT_VFILTER, MSGL_V, "!");
 451                 p->lastdrop = 0;
 452                 vf_detc_adjust_pts(&p->ptsbuf, pts, 0, 1);
 453                 return 0;
 454         }
 455
 456         p->outframes++;
 457         return vf_next_put_image(vf, dmpi, vf_detc_adjust_pts(&p->ptsbuf, pts, 0, 0));
 458 }
 459
 460 static int put_image(struct vf_instance *vf, mp_image_t *mpi, double pts)
 461 {
 462         int ret=0;
 463         struct vf_priv_s *p = vf->priv;
 464
 465         p->inframes++;
 466
 467         if (p->first) { /* hack */
 468                 p->first = 0;
 469                 vf_detc_adjust_pts(&p->ptsbuf, pts, 0, 1);
 470                 return 1;
 471         }
 472
 473         if (!p->dmpi) p->dmpi = vf_get_image(vf->next, mpi->imgfmt,
 474                 MP_IMGTYPE_STATIC, MP_IMGFLAG_ACCEPT_STRIDE |
 475                 MP_IMGFLAG_PRESERVE | MP_IMGFLAG_READABLE,
 476                 mpi->width, mpi->height);
 477         /* FIXME -- not correct, off by one frame! */
 478         p->dmpi->qscale = mpi->qscale;
 479         p->dmpi->qstride = mpi->qstride;
 480         p->dmpi->qscale_type = mpi->qscale_type;
 481
 482         switch (foo(p, mpi, p->dmpi)) {
 483         case F_DROP:
 484                 copy_image(p->dmpi, mpi, 2);
 485                 ret = 0;
 486                 p->lastdrop = 0;
 487                 mp_msg(MSGT_VFILTER, MSGL_V, "DROP\n");
 488                 vf_detc_adjust_pts(&p->ptsbuf, pts, 0, 1);
 489                 break;
 490         case F_MERGE:
 491                 copy_image(p->dmpi, mpi, 0);
 492                 ret = do_put_image(vf, p->dmpi, pts);
 493                 copy_image(p->dmpi, mpi, 1);
 494                 mp_msg(MSGT_VFILTER, MSGL_V, "MERGE\n");
 495                 p->dmpi = NULL;
 496                 break;
 497         case F_NEXT:
 498                 copy_image(p->dmpi, mpi, 2);
 499                 ret = do_put_image(vf, p->dmpi, pts);
 500                 mp_msg(MSGT_VFILTER, MSGL_V, "NEXT\n");
 501                 p->dmpi = NULL;
 502                 break;
 503         case F_SHOW:
 504                 ret = do_put_image(vf, p->dmpi, pts);
 505                 copy_image(p->dmpi, mpi, 2);
 506                 mp_msg(MSGT_VFILTER, MSGL_V, "OK\n");
 507                 p->dmpi = NULL;
 508                 break;
 509         }
 510         return ret;
 511 }
 512
 513 static int query_format(struct vf_instance *vf, unsigned int fmt)
 514 {
 515         switch (fmt) {
 516         case IMGFMT_YV12:
 517         case IMGFMT_IYUV:
 518         case IMGFMT_I420:
 519                 return vf_next_query_format(vf, fmt);
 520         }
 521         return 0;
 522 }
 523
 524 static void uninit(struct vf_instance *vf)
 525 {
 526         free(vf->priv);
 527 }
 528
 529 static int vf_open(vf_instance_t *vf, char *args)
 530 {
 531         struct vf_priv_s *p;
 532         vf->put_image = put_image;
 533         vf->query_format = query_format;
 534         vf->uninit = uninit;
 535         vf->default_reqs = VFCAP_ACCEPT_STRIDE;
 536         vf->priv = p = calloc(1, sizeof(struct vf_priv_s));
 537         p->drop = 0;
 538         p->first = 1;
 539         if (args) sscanf(args, "%d", &p->drop);
 540         block_diffs = block_diffs_C;
 541 #if HAVE_MMX && HAVE_EBX_AVAILABLE
 542         if(gCpuCaps.hasMMX) block_diffs = block_diffs_MMX;
 543 #endif
 544         vf_detc_init_pts_buf(&p->ptsbuf);
 545         return 1;
 546 }
 547
 548 const vf_info_t vf_info_ivtc = {
 549     "inverse telecine, take 2",
 550     "ivtc",
 551     "Rich Felker",
 552     "",
 553     vf_open,
 554     NULL
 555 };