libmpcodecs/vf_divtc.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 #include <limits.h>
  23 #include <math.h>
  24
  25 #include "config.h"
  26 #include "mp_msg.h"
  27 #include "cpudetect.h"
  28 #include "libavutil/common.h"
  29 #include "mpbswap.h"
  30
  31 #include "img_format.h"
  32 #include "mp_image.h"
  33 #include "vf.h"
  34
  35 #include "libvo/fastmemcpy.h"
  36
  37 const vf_info_t vf_info_divtc;
  38
  39 struct vf_priv_s
  40    {
  41    int deghost, pass, phase, window, fcount, bcount, frameno, misscount,
  42       ocount, sum[5];
  43    double threshold;
  44    FILE *file;
  45    int8_t *bdata;
  46    unsigned int *csdata;
  47    int *history;
  48    struct vf_detc_pts_buf ptsbuf;
  49    };
  50
  51 /*
  52  * diff_MMX and diff_C stolen from vf_decimate.c
  53  */
  54
  55 #if HAVE_MMX && HAVE_EBX_AVAILABLE
  56 static int diff_MMX(unsigned char *old, unsigned char *new, int os, int ns)
  57    {
  58    volatile short out[4];
  59    __asm__ (
  60         "movl $8, %%ecx \n\t"
  61         "pxor %%mm4, %%mm4 \n\t"
  62         "pxor %%mm7, %%mm7 \n\t"
  63
  64         ASMALIGN(4)
  65         "1: \n\t"
  66
  67         "movq (%%"REG_S"), %%mm0 \n\t"
  68         "movq (%%"REG_S"), %%mm2 \n\t"
  69         "add %%"REG_a", %%"REG_S" \n\t"
  70         "movq (%%"REG_D"), %%mm1 \n\t"
  71         "add %%"REG_b", %%"REG_D" \n\t"
  72         "psubusb %%mm1, %%mm2 \n\t"
  73         "psubusb %%mm0, %%mm1 \n\t"
  74         "movq %%mm2, %%mm0 \n\t"
  75         "movq %%mm1, %%mm3 \n\t"
  76         "punpcklbw %%mm7, %%mm0 \n\t"
  77         "punpcklbw %%mm7, %%mm1 \n\t"
  78         "punpckhbw %%mm7, %%mm2 \n\t"
  79         "punpckhbw %%mm7, %%mm3 \n\t"
  80         "paddw %%mm0, %%mm4 \n\t"
  81         "paddw %%mm1, %%mm4 \n\t"
  82         "paddw %%mm2, %%mm4 \n\t"
  83         "paddw %%mm3, %%mm4 \n\t"
  84
  85         "decl %%ecx \n\t"
  86         "jnz 1b \n\t"
  87         "movq %%mm4, (%%"REG_d") \n\t"
  88         "emms \n\t"
  89         :
  90         : "S" (old), "D" (new), "a" ((long)os), "b" ((long)ns), "d" (out)
  91         : "%ecx", "memory"
  92         );
  93    return out[0]+out[1]+out[2]+out[3];
  94    }
  95 #endif
  96
  97 static int diff_C(unsigned char *old, unsigned char *new, int os, int ns)
  98    {
  99    int x, y, d=0;
 100
 101    for(y=8; y; y--, new+=ns, old+=os)
 102       for(x=8; x; x--)
 103          d+=abs(new[x]-old[x]);
 104
 105    return d;
 106    }
 107
 108 static int (*diff)(unsigned char *, unsigned char *, int, int);
 109
 110 static int diff_plane(unsigned char *old, unsigned char *new,
 111                       int w, int h, int os, int ns, int arg)
 112    {
 113    int x, y, d, max=0, sum=0, n=0;
 114
 115    for(y=0; y<h-7; y+=8)
 116       {
 117       for(x=0; x<w-7; x+=8)
 118          {
 119          d=diff(old+x+y*os, new+x+y*ns, os, ns);
 120          if(d>max) max=d;
 121          sum+=d;
 122          n++;
 123          }
 124       }
 125
 126    return (sum+n*max)/2;
 127    }
 128
 129 /*
 130 static unsigned int checksum_plane(unsigned char *p, unsigned char *z,
 131                                    int w, int h, int s, int zs, int arg)
 132    {
 133    unsigned int shift, sum;
 134    unsigned char *e;
 135
 136    for(sum=0; h; h--, p+=s-w)
 137       for(e=p+w, shift=32; p<e;)
 138          sum^=(*p++)<<(shift=(shift-8)&31);
 139
 140    return sum;
 141    }
 142 */
 143
 144 static unsigned int checksum_plane(unsigned char *p, unsigned char *z,
 145                                    int w, int h, int s, int zs, int arg)
 146    {
 147    unsigned int shift;
 148    uint32_t sum, t;
 149    unsigned char *e, *e2;
 150 #if HAVE_FAST_64BIT
 151    typedef uint64_t wsum_t;
 152 #else
 153    typedef uint32_t wsum_t;
 154 #endif
 155    wsum_t wsum;
 156
 157    for(sum=0; h; h--, p+=s-w)
 158       {
 159       for(shift=0, e=p+w; (size_t)p&(sizeof(wsum_t)-1) && p<e;)
 160          sum^=*p++<<(shift=(shift-8)&31);
 161
 162       for(wsum=0, e2=e-sizeof(wsum_t)+1; p<e2; p+=sizeof(wsum_t))
 163          wsum^=*(wsum_t *)p;
 164
 165 #if HAVE_FAST_64BIT
 166       t=be2me_32((uint32_t)(wsum>>32^wsum));
 167 #else
 168       t=be2me_32(wsum);
 169 #endif
 170
 171       for(sum^=(t<<shift|t>>(32-shift)); p<e;)
 172          sum^=*p++<<(shift=(shift-8)&31);
 173       }
 174
 175    return sum;
 176    }
 177
 178 static int deghost_plane(unsigned char *d, unsigned char *s,
 179                          int w, int h, int ds, int ss, int threshold)
 180    {
 181    int t;
 182    unsigned char *e;
 183
 184    for(; h; h--, s+=ss-w, d+=ds-w)
 185       for(e=d+w; d<e; d++, s++)
 186          if(abs(*d-*s)>=threshold)
 187             *d=(t=(*d<<1)-*s)<0?0:t>255?255:t;
 188
 189    return 0;
 190    }
 191
 192 static int copyop(unsigned char *d, unsigned char *s, int bpl, int h, int dstride, int sstride, int dummy) {
 193   memcpy_pic(d, s, bpl, h, dstride, sstride);
 194   return 0;
 195 }
 196
 197 static int imgop(int(*planeop)(unsigned char *, unsigned char *,
 198                                int, int, int, int, int),
 199                  mp_image_t *dst, mp_image_t *src, int arg)
 200    {
 201    if(dst->flags&MP_IMGFLAG_PLANAR)
 202       return planeop(dst->planes[0], src?src->planes[0]:0,
 203                      dst->w, dst->h,
 204                      dst->stride[0], src?src->stride[0]:0, arg)+
 205              planeop(dst->planes[1], src?src->planes[1]:0,
 206                      dst->chroma_width, dst->chroma_height,
 207                      dst->stride[1], src?src->stride[1]:0, arg)+
 208              planeop(dst->planes[2], src?src->planes[2]:0,
 209                      dst->chroma_width, dst->chroma_height,
 210                      dst->stride[2], src?src->stride[2]:0, arg);
 211
 212    return planeop(dst->planes[0], src?src->planes[0]:0,
 213                   dst->w*(dst->bpp/8), dst->h,
 214                   dst->stride[0], src?src->stride[0]:0, arg);
 215    }
 216
 217 /*
 218  * Find the phase in which the telecine pattern fits best to the
 219  * given 5 frame slice of frame difference measurements.
 220  *
 221  * If phase1 and phase2 are not negative, only the two specified
 222  * phases are tested.
 223  */
 224
 225 static int match(struct vf_priv_s *p, int *diffs,
 226                  int phase1, int phase2, double *strength)
 227    {
 228    const int pattern1[]={ -4,  1, 1, 1, 1 },
 229       pattern2[]={ -2, -3, 4, 4, -3 }, *pattern;
 230    int f, m, n, t[5];
 231
 232    pattern=p->deghost>0?pattern2:pattern1;
 233
 234    for(f=0; f<5; f++)
 235       {
 236       if(phase1<0 || phase2<0 || f==phase1 || f==phase2)
 237          {
 238          for(n=t[f]=0; n<5; n++)
 239             t[f]+=diffs[n]*pattern[(n-f+5)%5];
 240          }
 241       else
 242          t[f]=INT_MIN;
 243       }
 244
 245    /* find the best match */
 246    for(m=0, n=1; n<5; n++)
 247       if(t[n]>t[m]) m=n;
 248
 249    if(strength)
 250       {
 251       /* the second best match */
 252       for(f=m?0:1, n=f+1; n<5; n++)
 253          if(n!=m && t[n]>t[f]) f=n;
 254
 255       *strength=(t[m]>0?(double)(t[m]-t[f])/t[m]:0.0);
 256       }
 257
 258    return m;
 259    }
 260
 261 static int put_image(struct vf_instance *vf, mp_image_t *mpi, double pts)
 262    {
 263    mp_image_t *dmpi, *tmpi=0;
 264    int n, m, f, newphase;
 265    struct vf_priv_s *p=vf->priv;
 266    unsigned int checksum;
 267    double d;
 268
 269    dmpi=vf_get_image(vf->next, mpi->imgfmt,
 270                      MP_IMGTYPE_STATIC, MP_IMGFLAG_ACCEPT_STRIDE |
 271                      MP_IMGFLAG_PRESERVE | MP_IMGFLAG_READABLE,
 272                      mpi->width, mpi->height);
 273    vf_clone_mpi_attributes(dmpi, mpi);
 274
 275    newphase=p->phase;
 276
 277    switch(p->pass)
 278       {
 279       case 1:
 280          fprintf(p->file, "%08x %d\n",
 281                  (unsigned int)imgop((void *)checksum_plane, mpi, 0, 0),
 282                  p->frameno?imgop(diff_plane, dmpi, mpi, 0):0);
 283          break;
 284
 285       case 2:
 286          if(p->frameno/5>p->bcount)
 287             {
 288             mp_msg(MSGT_VFILTER, MSGL_ERR,
 289                    "\n%s: Log file ends prematurely! "
 290                    "Switching to one pass mode.\n", vf->info->name);
 291             p->pass=0;
 292             break;
 293             }
 294
 295          checksum=(unsigned int)imgop((void *)checksum_plane, mpi, 0, 0);
 296
 297          if(checksum!=p->csdata[p->frameno])
 298             {
 299             for(f=0; f<100; f++)
 300                if(p->frameno+f<p->fcount && p->csdata[p->frameno+f]==checksum)
 301                   break;
 302                else if(p->frameno-f>=0 && p->csdata[p->frameno-f]==checksum)
 303                   {
 304                   f=-f;
 305                   break;
 306                   }
 307
 308             if(f<100)
 309                {
 310                mp_msg(MSGT_VFILTER, MSGL_INFO,
 311                       "\n%s: Mismatch with pass-1: %+d frame(s).\n",
 312                       vf->info->name, f);
 313
 314                p->frameno+=f;
 315                p->misscount=0;
 316                }
 317             else if(p->misscount++>=30)
 318                {
 319                mp_msg(MSGT_VFILTER, MSGL_ERR,
 320                       "\n%s: Sync with pass-1 lost! "
 321                       "Switching to one pass mode.\n", vf->info->name);
 322                p->pass=0;
 323                break;
 324                }
 325             }
 326
 327          n=(p->frameno)/5;
 328          if(n>=p->bcount) n=p->bcount-1;
 329
 330          newphase=p->bdata[n];
 331          break;
 332
 333       default:
 334          if(p->frameno)
 335             {
 336             int *sump=p->sum+p->frameno%5,
 337                *histp=p->history+p->frameno%p->window;
 338
 339             *sump-=*histp;
 340             *sump+=(*histp=imgop(diff_plane, dmpi, mpi, 0));
 341             }
 342
 343          m=match(p, p->sum, -1, -1, &d);
 344
 345          if(d>=p->threshold)
 346             newphase=m;
 347       }
 348
 349    n=p->ocount++%5;
 350
 351    if(newphase!=p->phase && ((p->phase+4)%5<n)==((newphase+4)%5<n))
 352       {
 353       p->phase=newphase;
 354       mp_msg(MSGT_VFILTER, MSGL_STATUS,
 355              "\n%s: Telecine phase %d.\n", vf->info->name, p->phase);
 356       }
 357
 358    switch((p->frameno++-p->phase+10)%5)
 359       {
 360       case 0:
 361          imgop(copyop, dmpi, mpi, 0);
 362          vf_detc_adjust_pts(&p->ptsbuf, pts, 0, 1);
 363          return 0;
 364
 365       case 4:
 366          if(p->deghost>0)
 367             {
 368             tmpi=vf_get_image(vf->next, mpi->imgfmt,
 369                               MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE |
 370                               MP_IMGFLAG_READABLE,
 371                               mpi->width, mpi->height);
 372             vf_clone_mpi_attributes(tmpi, mpi);
 373
 374             imgop(copyop, tmpi, mpi, 0);
 375             imgop(deghost_plane, tmpi, dmpi, p->deghost);
 376             imgop(copyop, dmpi, mpi, 0);
 377             return vf_next_put_image(vf, tmpi, vf_detc_adjust_pts(&p->ptsbuf, pts, 0, 0));
 378             }
 379       }
 380
 381    imgop(copyop, dmpi, mpi, 0);
 382    return vf_next_put_image(vf, dmpi, vf_detc_adjust_pts(&p->ptsbuf, pts, 0, 0));
 383    }
 384
 385 static int analyze(struct vf_priv_s *p)
 386    {
 387    int *buf=0, *bp, bufsize=0, n, b, f, i, j, m, s;
 388    unsigned int *cbuf=0, *cp;
 389    int8_t *pbuf;
 390    int8_t lbuf[256];
 391    int sum[5];
 392    double d;
 393
 394    /* read the file */
 395
 396    n=15;
 397    while(fgets(lbuf, 256, p->file))
 398       {
 399       if(n>=bufsize-19)
 400          {
 401          bufsize=bufsize?bufsize*2:30000;
 402          if((bp=realloc(buf, bufsize*sizeof *buf))) buf=bp;
 403          if((cp=realloc(cbuf, bufsize*sizeof *cbuf))) cbuf=cp;
 404
 405          if(!bp || !cp)
 406             {
 407             mp_msg(MSGT_VFILTER, MSGL_FATAL, "%s: Not enough memory.\n",
 408                    vf_info_divtc.name);
 409             free(buf);
 410             free(cbuf);
 411             return 0;
 412             }
 413          }
 414       sscanf(lbuf, "%x %d", cbuf+n, buf+n);
 415       n++;
 416       }
 417
 418    if(!n)
 419       {
 420       mp_msg(MSGT_VFILTER, MSGL_FATAL, "%s: Empty 2-pass log file.\n",
 421              vf_info_divtc.name);
 422       free(buf);
 423       free(cbuf);
 424       return 0;
 425       }
 426
 427    /* generate some dummy data past the beginning and end of the array */
 428
 429    buf+=15, cbuf+=15;
 430    n-=15;
 431
 432    memcpy(buf-15, buf, 15*sizeof *buf);
 433    memset(cbuf-15, 0, 15*sizeof *cbuf);
 434
 435    while(n%5)
 436       buf[n]=buf[n-5], cbuf[n]=0, n++;
 437
 438    memcpy(buf+n, buf+n-15, 15*sizeof *buf);
 439    memset(cbuf+n, 0, 15*sizeof *cbuf);
 440
 441    p->csdata=cbuf;
 442    p->fcount=n;
 443
 444    /* array with one slot for each slice of 5 frames */
 445
 446    p->bdata=pbuf=malloc(p->bcount=b=(n/5));
 447    memset(pbuf, 255, b);
 448
 449    /* resolve the automatic mode */
 450
 451    if(p->deghost<0)
 452       {
 453       int deghost=-p->deghost;
 454       double s0=0.0, s1=0.0;
 455
 456       for(f=0; f<n; f+=5)
 457          {
 458          p->deghost=0; match(p, buf+f, -1, -1, &d); s0+=d;
 459          p->deghost=1; match(p, buf+f, -1, -1, &d); s1+=d;
 460          }
 461
 462       p->deghost=s1>s0?deghost:0;
 463
 464       mp_msg(MSGT_VFILTER, MSGL_INFO,
 465              "%s: Deghosting %-3s (relative pattern strength %+.2fdB).\n",
 466              vf_info_divtc.name,
 467              p->deghost?"ON":"OFF",
 468              10.0*log10(s1/s0));
 469       }
 470
 471    /* analyze the data */
 472
 473    for(f=0; f<5; f++)
 474       for(sum[f]=0, n=-15; n<20; n+=5)
 475          sum[f]+=buf[n+f];
 476
 477    for(f=0; f<b; f++)
 478       {
 479       m=match(p, sum, -1, -1, &d);
 480
 481       if(d>=p->threshold)
 482          pbuf[f]=m;
 483
 484       if(f<b-1)
 485          for(n=0; n<5; n++)
 486             sum[n]=sum[n]-buf[5*(f-3)+n]+buf[5*(f+4)+n];
 487       }
 488
 489    /* fill in the gaps */
 490
 491    /* the beginning */
 492    for(f=0; f<b && pbuf[f]==-1; f++);
 493
 494    if(f==b)
 495       {
 496       free(buf-15);
 497       mp_msg(MSGT_VFILTER, MSGL_FATAL, "%s: No telecine pattern found!\n",
 498              vf_info_divtc.name);
 499       return 0;
 500       }
 501
 502    for(n=0; n<f; pbuf[n++]=pbuf[f]);
 503
 504    /* the end */
 505    for(f=b-1; pbuf[f]==-1; f--);
 506    for(n=f+1; n<b; pbuf[n++]=pbuf[f]);
 507
 508    /* the rest */
 509    for(f=0;;)
 510       {
 511       while(f<b && pbuf[f]!=-1) f++;
 512       if(f==b) break;
 513       for(n=f; pbuf[n]==-1; n++);
 514
 515       if(pbuf[f-1]==pbuf[n])
 516          {
 517          /* just a gap */
 518          while(f<n) pbuf[f++]=pbuf[n];
 519          }
 520       else
 521          {
 522          /* phase change, reanalyze the original data in the gap with zero
 523             threshold for only the two phases that appear at the ends */
 524
 525          for(i=0; i<5; i++)
 526             for(sum[i]=0, j=5*f-15; j<5*f; j+=5)
 527                sum[i]+=buf[i+j];
 528
 529          for(i=f; i<n; i++)
 530             {
 531             pbuf[i]=match(p, sum, pbuf[f-1], pbuf[n], 0);
 532
 533             for(j=0; j<5; j++)
 534                sum[j]=sum[j]-buf[5*(i-3)+j]+buf[5*(i+4)+j];
 535             }
 536
 537          /* estimate the transition point by dividing the gap
 538             in the same proportion as the number of matches of each kind */
 539
 540          for(i=f, m=f; i<n; i++)
 541             if(pbuf[i]==pbuf[f-1]) m++;
 542
 543          /* find the transition of the right direction nearest to the
 544             estimated point */
 545
 546          if(m>f && m<n)
 547             {
 548             for(j=m; j>f; j--)
 549                if(pbuf[j-1]==pbuf[f-1] && pbuf[j]==pbuf[n]) break;
 550             for(s=m; s<n; s++)
 551                if(pbuf[s-1]==pbuf[f-1] && pbuf[s]==pbuf[n]) break;
 552
 553             m=(s-m<m-j)?s:j;
 554             }
 555
 556          /* and rewrite the data to allow only this one transition */
 557
 558          for(i=f; i<m; i++)
 559             pbuf[i]=pbuf[f-1];
 560
 561          for(; i<n; i++)
 562             pbuf[i]=pbuf[n];
 563
 564          f=n;
 565          }
 566       }
 567
 568    free(buf-15);
 569
 570    return 1;
 571    }
 572
 573 static int query_format(struct vf_instance *vf, unsigned int fmt)
 574    {
 575    switch(fmt)
 576       {
 577       case IMGFMT_444P: case IMGFMT_IYUV: case IMGFMT_RGB24:
 578       case IMGFMT_422P: case IMGFMT_UYVY: case IMGFMT_BGR24:
 579       case IMGFMT_411P: case IMGFMT_YUY2: case IMGFMT_IF09:
 580       case IMGFMT_YV12: case IMGFMT_I420: case IMGFMT_YVU9:
 581       case IMGFMT_IUYV: case IMGFMT_Y800: case IMGFMT_Y8:
 582          return vf_next_query_format(vf,fmt);
 583       }
 584
 585    return 0;
 586    }
 587
 588 static void uninit(struct vf_instance *vf)
 589    {
 590    if(vf->priv)
 591       {
 592       if(vf->priv->file) fclose(vf->priv->file);
 593       if(vf->priv->csdata) free(vf->priv->csdata-15);
 594       free(vf->priv->bdata);
 595       free(vf->priv->history);
 596       free(vf->priv);
 597       }
 598    }
 599
 600 static int vf_open(vf_instance_t *vf, char *args)
 601    {
 602    struct vf_priv_s *p;
 603    char *filename="framediff.log", *ap, *q, *a;
 604
 605    if(args && !(args=strdup(args)))
 606       {
 607    nomem:
 608       mp_msg(MSGT_VFILTER, MSGL_FATAL,
 609              "%s: Not enough memory.\n", vf->info->name);
 610    fail:
 611       uninit(vf);
 612       free(args);
 613       return 0;
 614       }
 615
 616    vf->put_image=put_image;
 617    vf->uninit=uninit;
 618    vf->query_format=query_format;
 619    vf->default_reqs=VFCAP_ACCEPT_STRIDE;
 620    if(!(vf->priv=p=calloc(1, sizeof(struct vf_priv_s))))
 621       goto nomem;
 622
 623    p->phase=5;
 624    p->threshold=0.5;
 625    p->window=30;
 626
 627    if((ap=args))
 628       while(*ap)
 629          {
 630          q=ap;
 631          if((ap=strchr(q, ':'))) *ap++=0; else ap=q+strlen(q);
 632          if((a=strchr(q, '='))) *a++=0; else a=q+strlen(q);
 633
 634          switch(*q)
 635             {
 636             case 0:                              break;
 637             case 'f': filename=a;                break;
 638             case 't': p->threshold=atof(a);      break;
 639             case 'w': p->window=5*(atoi(a)+4)/5; break;
 640             case 'd': p->deghost=atoi(a);        break;
 641             case 'p':
 642                if(q[1]=='h') p->phase=atoi(a);
 643                else p->pass=atoi(a);
 644                break;
 645
 646             case 'h':
 647                mp_msg(MSGT_VFILTER, MSGL_INFO,
 648                       "\n%s options:\n\n"
 649                       "pass=1|2         - Use 2-pass mode.\n"
 650                       "file=filename    - Set the 2-pass log file name "
 651                       "(default %s).\n"
 652                       "threshold=value  - Set the pattern recognition "
 653                       "sensitivity (default %g).\n"
 654                       "deghost=value    - Select deghosting threshold "
 655                       "(default %d).\n"
 656                       "window=numframes - Set the statistics window "
 657                       "for 1-pass mode (default %d).\n"
 658                       "phase=0|1|2|3|4  - Set the initial phase "
 659                       "for 1-pass mode (default %d).\n\n"
 660                       "The option names can be abbreviated to the shortest "
 661                       "unique prefix.\n\n",
 662                       vf->info->name, filename, p->threshold, p->deghost,
 663                       p->window, p->phase%5);
 664                break;
 665
 666             default:
 667                mp_msg(MSGT_VFILTER, MSGL_FATAL,
 668                       "%s: Unknown argument %s.\n", vf->info->name, q);
 669                goto fail;
 670             }
 671          }
 672
 673    switch(p->pass)
 674       {
 675       case 1:
 676          if(!(p->file=fopen(filename, "w")))
 677             {
 678             mp_msg(MSGT_VFILTER, MSGL_FATAL,
 679                    "%s: Can't create file %s.\n", vf->info->name, filename);
 680             goto fail;
 681             }
 682
 683          break;
 684
 685       case 2:
 686          if(!(p->file=fopen(filename, "r")))
 687             {
 688             mp_msg(MSGT_VFILTER, MSGL_FATAL,
 689                    "%s: Can't open file %s.\n", vf->info->name, filename);
 690             goto fail;
 691             }
 692
 693          if(!analyze(p))
 694             goto fail;
 695
 696          fclose(p->file);
 697          p->file=0;
 698          break;
 699       }
 700
 701    if(p->window<5) p->window=5;
 702    if(!(p->history=calloc(sizeof *p->history, p->window)))
 703       goto nomem;
 704
 705    diff = diff_C;
 706 #if HAVE_MMX && HAVE_EBX_AVAILABLE
 707    if(gCpuCaps.hasMMX) diff = diff_MMX;
 708 #endif
 709
 710    free(args);
 711    vf_detc_init_pts_buf(&p->ptsbuf);
 712    return 1;
 713    }
 714
 715 const vf_info_t vf_info_divtc =
 716    {
 717    "inverse telecine for deinterlaced video",
 718    "divtc",
 719    "Ville Saari",
 720    "",
 721    vf_open,
 722    NULL
 723    };