libmpcodecs/vf_ivtc.c

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