libmpcodecs/vf_detc.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
  26 #include "img_format.h"
  27 #include "mp_image.h"
  28 #include "vf.h"
  29
  30 #include "libvo/fastmemcpy.h"
  31
  32 struct metrics {
  33         int even;
  34         int odd;
  35         int noise;
  36         int temp;
  37 };
  38
  39 struct vf_priv_s {
  40         int frame;
  41         int drop, lastdrop;
  42         struct metrics pm;
  43         int thres[5];
  44         int inframes, outframes;
  45         int mode;
  46         int (*analyze)(struct vf_priv_s *, mp_image_t *, mp_image_t *);
  47         int needread;
  48 };
  49
  50 #define COMPE(a,b,e) (abs((a)-(b)) < (((a)+(b))>>(e)))
  51 #define COMPARABLE(a,b) COMPE((a),(b),2)
  52 #define VERYCLOSE(a,b) COMPE((a),(b),3)
  53
  54 #define OUTER_TC_NBHD(s) ( \
  55  COMPARABLE((s)[-1].m.even,(s)[-1].m.odd) && \
  56  COMPARABLE((s)[1].m.even,(s)[0].m.odd) && \
  57  COMPARABLE((s)[2].m.even,(s)[1].m.odd) && \
  58  COMPARABLE((s)[-1].m.noise,(s)[0].m.temp) && \
  59  COMPARABLE((s)[2].m.noise,(s)[2].m.temp) )
  60
  61 #define INNER_TC_NBHD(s,l,h) ( \
  62  COMPARABLE((s)[0].m.even,(l)) && \
  63  COMPARABLE((s)[2].m.odd,(l)) && ( \
  64  COMPARABLE((s)[0].m.noise,(h)) || \
  65  COMPARABLE((s)[1].m.noise,(h)) ) )
  66
  67 enum {
  68         TC_DROP,
  69         TC_PROG,
  70         TC_IL1,
  71         TC_IL2
  72 };
  73
  74 static void block_diffs(struct metrics *m, unsigned char *old, unsigned char *new, int os, int ns)
  75 {
  76         int x, y, even=0, odd=0, noise, temp;
  77         unsigned char *oldp, *newp;
  78         m->noise = m->temp = 0;
  79         for (x = 8; x; x--) {
  80                 oldp = old++;
  81                 newp = new++;
  82                 noise = temp = 0;
  83                 for (y = 4; y; y--) {
  84                         even += abs(newp[0]-oldp[0]);
  85                         odd += abs(newp[ns]-oldp[os]);
  86                         noise += newp[ns]-newp[0];
  87                         temp += oldp[os]-newp[0];
  88                         oldp += os<<1;
  89                         newp += ns<<1;
  90                 }
  91                 m->noise += abs(noise);
  92                 m->temp += abs(temp);
  93         }
  94         m->even = even;
  95         m->odd = odd;
  96 }
  97
  98 static void diff_planes(struct metrics *m, unsigned char *old, unsigned char *new, int w, int h, int os, int ns)
  99 {
 100         int x, y, me=0, mo=0, mn=0, mt=0;
 101         struct metrics l;
 102         for (y = 0; y < h-7; y += 8) {
 103                 for (x = 0; x < w-7; x += 8) {
 104                         block_diffs(&l, old+x+y*os, new+x+y*ns, os, ns);
 105                         if (l.even > me) me = l.even;
 106                         if (l.odd > mo) mo = l.odd;
 107                         if (l.noise > mn) mn = l.noise;
 108                         if (l.temp > mt) mt = l.temp;
 109                 }
 110         }
 111         m->even = me;
 112         m->odd = mo;
 113         m->noise = mn;
 114         m->temp = mt;
 115 }
 116
 117 static void diff_fields(struct metrics *metr, mp_image_t *old, mp_image_t *new)
 118 {
 119         struct metrics m, mu, mv;
 120         diff_planes(&m, old->planes[0], new->planes[0],
 121                 new->w, new->h, old->stride[0], new->stride[0]);
 122         if (new->flags & MP_IMGFLAG_PLANAR) {
 123                 diff_planes(&mu, old->planes[1], new->planes[1],
 124                         new->chroma_width, new->chroma_height,
 125                         old->stride[1], new->stride[1]);
 126                 diff_planes(&mv, old->planes[2], new->planes[2],
 127                         new->chroma_width, new->chroma_height,
 128                         old->stride[2], new->stride[2]);
 129                 if (mu.even > m.even) m.even = mu.even;
 130                 if (mu.odd > m.odd) m.odd = mu.odd;
 131                 if (mu.noise > m.noise) m.noise = mu.noise;
 132                 if (mu.temp > m.temp) m.temp = mu.temp;
 133                 if (mv.even > m.even) m.even = mv.even;
 134                 if (mv.odd > m.odd) m.odd = mv.odd;
 135                 if (mv.noise > m.noise) m.noise = mv.noise;
 136                 if (mv.temp > m.temp) m.temp = mv.temp;
 137         }
 138         *metr = m;
 139 }
 140
 141 static void status(int f, struct metrics *m)
 142 {
 143         mp_msg(MSGT_VFILTER, MSGL_V, "frame %d: e=%d o=%d n=%d t=%d\n",
 144                 f, m->even, m->odd, m->noise, m->temp);
 145 }
 146
 147 static int analyze_fixed_pattern(struct vf_priv_s *p, mp_image_t *new, mp_image_t *old)
 148 {
 149         if (p->frame >= 0) p->frame = (p->frame+1)%5;
 150         mp_msg(MSGT_VFILTER, MSGL_V, "frame %d\n", p->frame);
 151         switch (p->frame) {
 152         case -1: case 0: case 1: case 2:
 153                 return TC_PROG;
 154         case 3:
 155                 return TC_IL1;
 156         case 4:
 157                 return TC_IL2;
 158         }
 159         return 0;
 160 }
 161
 162 static int analyze_aggressive(struct vf_priv_s *p, mp_image_t *new, mp_image_t *old)
 163 {
 164         struct metrics m, pm;
 165
 166         if (p->frame >= 0) p->frame = (p->frame+1)%5;
 167
 168         diff_fields(&m, old, new);
 169
 170         status(p->frame, &m);
 171
 172         pm = p->pm;
 173         p->pm = m;
 174
 175         if (p->frame == 4) {
 176                 /* We need to break at scene changes, but is this a valid test? */
 177                 if ((m.even > p->thres[2]) && (m.odd > p->thres[2]) && (m.temp > p->thres[3])
 178                         && (m.temp > 5*pm.temp) && (m.temp*2 > m.noise)) {
 179                         mp_msg(MSGT_VFILTER, MSGL_V, "scene change breaking telecine!\n");
 180                         p->frame = -1;
 181                         return TC_DROP;
 182                 }
 183                 /* Thres. is to compensate for quantization errors when noise is low */
 184                 if (m.noise - m.temp > -p->thres[4]) {
 185                         if (COMPARABLE(m.even, pm.odd)) {
 186                                 //mp_msg(MSGT_VFILTER, MSGL_V, "confirmed field match!\n");
 187                                 return TC_IL2;
 188                         } else if ((m.even < p->thres[0]) && (m.odd < p->thres[0]) && VERYCLOSE(m.even, m.odd)
 189                                 && VERYCLOSE(m.noise,m.temp) && VERYCLOSE(m.noise,pm.noise)) {
 190                                 mp_msg(MSGT_VFILTER, MSGL_V, "interlaced frame appears in duplicate!!!\n");
 191                                 p->pm = pm; /* hack :) */
 192                                 p->frame = 3;
 193                                 return TC_IL1;
 194                         }
 195                 } else {
 196                         mp_msg(MSGT_VFILTER, MSGL_V, "mismatched telecine fields!\n");
 197                         p->frame = -1;
 198                 }
 199         }
 200
 201         if (2*m.even*m.temp < m.odd*m.noise) {
 202                 mp_msg(MSGT_VFILTER, MSGL_V, "caught telecine sync!\n");
 203                 p->frame = 3;
 204                 return TC_IL1;
 205         }
 206
 207         if (p->frame < 3) {
 208                 if (m.noise > p->thres[3]) {
 209                         if (m.noise > 2*m.temp) {
 210                                 mp_msg(MSGT_VFILTER, MSGL_V, "merging fields out of sequence!\n");
 211                                 return TC_IL2;
 212                         }
 213                         if ((m.noise > 2*pm.noise) && (m.even > p->thres[2]) && (m.odd > p->thres[2])) {
 214                                 mp_msg(MSGT_VFILTER, MSGL_V, "dropping horrible interlaced frame!\n");
 215                                 return TC_DROP;
 216                         }
 217                 }
 218         }
 219
 220         switch (p->frame) {
 221         case -1:
 222                 if (4*m.noise > 5*m.temp) {
 223                         mp_msg(MSGT_VFILTER, MSGL_V, "merging fields out of sequence!\n");
 224                         return TC_IL2;
 225                 }
 226         case 0:
 227         case 1:
 228         case 2:
 229                 return TC_PROG;
 230         case 3:
 231                 if ((m.even > p->thres[1]) && (m.even > m.odd) && (m.temp > m.noise)) {
 232                         mp_msg(MSGT_VFILTER, MSGL_V, "lost telecine tracking!\n");
 233                         p->frame = -1;
 234                         return TC_PROG;
 235                 }
 236                 return TC_IL1;
 237         case 4:
 238                 return TC_IL2;
 239         }
 240         return 0;
 241 }
 242
 243 static void copy_image(mp_image_t *dmpi, mp_image_t *mpi, int field)
 244 {
 245         switch (field) {
 246         case 0:
 247                 my_memcpy_pic(dmpi->planes[0], mpi->planes[0], mpi->w, mpi->h/2,
 248                         dmpi->stride[0]*2, mpi->stride[0]*2);
 249                 if (mpi->flags & MP_IMGFLAG_PLANAR) {
 250                         my_memcpy_pic(dmpi->planes[1], mpi->planes[1],
 251                                 mpi->chroma_width, mpi->chroma_height/2,
 252                                 dmpi->stride[1]*2, mpi->stride[1]*2);
 253                         my_memcpy_pic(dmpi->planes[2], mpi->planes[2],
 254                                 mpi->chroma_width, mpi->chroma_height/2,
 255                                 dmpi->stride[2]*2, mpi->stride[2]*2);
 256                 }
 257                 break;
 258         case 1:
 259                 my_memcpy_pic(dmpi->planes[0]+dmpi->stride[0],
 260                         mpi->planes[0]+mpi->stride[0], mpi->w, mpi->h/2,
 261                         dmpi->stride[0]*2, mpi->stride[0]*2);
 262                 if (mpi->flags & MP_IMGFLAG_PLANAR) {
 263                         my_memcpy_pic(dmpi->planes[1]+dmpi->stride[1],
 264                                 mpi->planes[1]+mpi->stride[1],
 265                                 mpi->chroma_width, mpi->chroma_height/2,
 266                                 dmpi->stride[1]*2, mpi->stride[1]*2);
 267                         my_memcpy_pic(dmpi->planes[2]+dmpi->stride[2],
 268                                 mpi->planes[2]+mpi->stride[2],
 269                                 mpi->chroma_width, mpi->chroma_height/2,
 270                                 dmpi->stride[2]*2, mpi->stride[2]*2);
 271                 }
 272                 break;
 273         case 2:
 274                 memcpy_pic(dmpi->planes[0], mpi->planes[0], mpi->w, mpi->h,
 275                         dmpi->stride[0], mpi->stride[0]);
 276                 if (mpi->flags & MP_IMGFLAG_PLANAR) {
 277                         memcpy_pic(dmpi->planes[1], mpi->planes[1],
 278                                 mpi->chroma_width, mpi->chroma_height,
 279                                 dmpi->stride[1], mpi->stride[1]);
 280                         memcpy_pic(dmpi->planes[2], mpi->planes[2],
 281                                 mpi->chroma_width, mpi->chroma_height,
 282                                 dmpi->stride[2], mpi->stride[2]);
 283                 }
 284                 break;
 285         }
 286 }
 287
 288 static int do_put_image(struct vf_instance *vf, mp_image_t *dmpi)
 289 {
 290         struct vf_priv_s *p = vf->priv;
 291         int dropflag;
 292
 293         switch (p->drop) {
 294         default:
 295                 dropflag = 0;
 296                 break;
 297         case 1:
 298                 dropflag = (++p->lastdrop >= 5);
 299                 break;
 300         case 2:
 301                 dropflag = (++p->lastdrop >= 5) && (4*p->inframes <= 5*p->outframes);
 302                 break;
 303         }
 304
 305         if (dropflag) {
 306                 mp_msg(MSGT_VFILTER, MSGL_V, "drop! [%d/%d=%g]\n",
 307                         p->outframes, p->inframes, (float)p->outframes/p->inframes);
 308                 p->lastdrop = 0;
 309                 return 0;
 310         }
 311
 312         p->outframes++;
 313         return vf_next_put_image(vf, dmpi, MP_NOPTS_VALUE);
 314 }
 315
 316 static int put_image(struct vf_instance *vf, mp_image_t *mpi, double pts)
 317 {
 318         int ret=0;
 319         mp_image_t *dmpi;
 320         struct vf_priv_s *p = vf->priv;
 321
 322         p->inframes++;
 323
 324         if (p->needread) dmpi = vf_get_image(vf->next, mpi->imgfmt,
 325                 MP_IMGTYPE_STATIC, MP_IMGFLAG_ACCEPT_STRIDE |
 326                 MP_IMGFLAG_PRESERVE | MP_IMGFLAG_READABLE,
 327                 mpi->width, mpi->height);
 328         /* FIXME: is there a good way to get rid of static type? */
 329         else dmpi = vf_get_image(vf->next, mpi->imgfmt,
 330                 MP_IMGTYPE_STATIC, MP_IMGFLAG_ACCEPT_STRIDE |
 331                 MP_IMGFLAG_PRESERVE, mpi->width, mpi->height);
 332
 333         switch (p->analyze(p, mpi, dmpi)) {
 334         case TC_DROP:
 335                 /* Don't copy anything unless we'll need to read it. */
 336                 if (p->needread) copy_image(dmpi, mpi, 2);
 337                 p->lastdrop = 0;
 338                 break;
 339         case TC_PROG:
 340                 /* Copy and display the whole frame. */
 341                 copy_image(dmpi, mpi, 2);
 342                 ret = do_put_image(vf, dmpi);
 343                 break;
 344         case TC_IL1:
 345                 /* Only copy bottom field unless we need to read. */
 346                 if (p->needread) copy_image(dmpi, mpi, 2);
 347                 else copy_image(dmpi, mpi, 1);
 348                 p->lastdrop = 0;
 349                 break;
 350         case TC_IL2:
 351                 /* Copy top field and show frame, then copy bottom if needed. */
 352                 copy_image(dmpi, mpi, 0);
 353                 ret = do_put_image(vf, dmpi);
 354                 if (p->needread) copy_image(dmpi, mpi, 1);
 355                 break;
 356         }
 357         return ret;
 358 }
 359
 360 static int query_format(struct vf_instance *vf, unsigned int fmt)
 361 {
 362         /* FIXME - figure out which other formats work */
 363         switch (fmt) {
 364         case IMGFMT_YV12:
 365         case IMGFMT_IYUV:
 366         case IMGFMT_I420:
 367                 return vf_next_query_format(vf, fmt);
 368         }
 369         return 0;
 370 }
 371
 372 static int config(struct vf_instance *vf,
 373         int width, int height, int d_width, int d_height,
 374         unsigned int flags, unsigned int outfmt)
 375 {
 376         return vf_next_config(vf,width,height,d_width,d_height,flags,outfmt);
 377 }
 378
 379 static void uninit(struct vf_instance *vf)
 380 {
 381         free(vf->priv);
 382 }
 383
 384 static struct {
 385         char *name;
 386         int (*func)(struct vf_priv_s *p, mp_image_t *new, mp_image_t *old);
 387         int needread;
 388 } anal_funcs[] = {
 389         { "fixed", analyze_fixed_pattern, 0 },
 390         { "aggressive", analyze_aggressive, 1 },
 391         { NULL, NULL, 0 }
 392 };
 393
 394 #define STARTVARS if (0)
 395 #define GETVAR(str, name, out, func) \
 396  else if (!strncmp((str), name "=", sizeof(name))) \
 397  (out) = (func)((str) + sizeof(name))
 398
 399 static void parse_var(struct vf_priv_s *p, char *var)
 400 {
 401         STARTVARS;
 402         GETVAR(var, "dr", p->drop, atoi);
 403         GETVAR(var, "t0", p->thres[0], atoi);
 404         GETVAR(var, "t1", p->thres[1], atoi);
 405         GETVAR(var, "t2", p->thres[2], atoi);
 406         GETVAR(var, "t3", p->thres[3], atoi);
 407         GETVAR(var, "t4", p->thres[4], atoi);
 408         GETVAR(var, "fr", p->frame, atoi);
 409         GETVAR(var, "am", p->mode, atoi);
 410 }
 411
 412 static void parse_args(struct vf_priv_s *p, char *args)
 413 {
 414         char *next, *orig;
 415         for (args=orig=strdup(args); args; args=next) {
 416                 next = strchr(args, ':');
 417                 if (next) *next++ = 0;
 418                 parse_var(p, args);
 419         }
 420         free(orig);
 421 }
 422
 423 static int vf_open(vf_instance_t *vf, char *args)
 424 {
 425         struct vf_priv_s *p;
 426         vf->config = config;
 427         vf->put_image = put_image;
 428         vf->query_format = query_format;
 429         vf->uninit = uninit;
 430         vf->default_reqs = VFCAP_ACCEPT_STRIDE;
 431         vf->priv = p = calloc(1, sizeof(struct vf_priv_s));
 432         p->frame = -1;
 433         p->thres[0] = 440;
 434         p->thres[1] = 720;
 435         p->thres[2] = 2500;
 436         p->thres[3] = 2500;
 437         p->thres[4] = 800;
 438         p->drop = 0;
 439         p->mode = 1;
 440         if (args) parse_args(p, args);
 441         p->analyze = anal_funcs[p->mode].func;
 442         p->needread = anal_funcs[p->mode].needread;
 443         return 1;
 444 }
 445
 446 const vf_info_t vf_info_detc = {
 447     "de-telecine filter",
 448     "detc",
 449     "Rich Felker",
 450     "",
 451     vf_open,
 452     NULL
 453 };