libmpcodecs/vf.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 #if HAVE_MALLOC_H
  25 #include <malloc.h>
  26 #endif
  27
  28 #ifdef MP_DEBUG
  29 #include <assert.h>
  30 #endif
  31
  32 #include "mp_msg.h"
  33 #include "m_option.h"
  34 #include "m_struct.h"
  35
  36
  37 #include "img_format.h"
  38 #include "mp_image.h"
  39 #include "vf.h"
  40
  41 #include "libvo/fastmemcpy.h"
  42 #include "libavutil/mem.h"
  43
  44 extern const vf_info_t vf_info_vo;
  45 extern const vf_info_t vf_info_rectangle;
  46 extern const vf_info_t vf_info_bmovl;
  47 extern const vf_info_t vf_info_crop;
  48 extern const vf_info_t vf_info_expand;
  49 extern const vf_info_t vf_info_pp;
  50 extern const vf_info_t vf_info_scale;
  51 extern const vf_info_t vf_info_format;
  52 extern const vf_info_t vf_info_noformat;
  53 extern const vf_info_t vf_info_flip;
  54 extern const vf_info_t vf_info_rgb2bgr;
  55 extern const vf_info_t vf_info_rotate;
  56 extern const vf_info_t vf_info_mirror;
  57 extern const vf_info_t vf_info_palette;
  58 extern const vf_info_t vf_info_lavc;
  59 extern const vf_info_t vf_info_zrmjpeg;
  60 extern const vf_info_t vf_info_dvbscale;
  61 extern const vf_info_t vf_info_cropdetect;
  62 extern const vf_info_t vf_info_test;
  63 extern const vf_info_t vf_info_noise;
  64 extern const vf_info_t vf_info_yvu9;
  65 extern const vf_info_t vf_info_lavcdeint;
  66 extern const vf_info_t vf_info_eq;
  67 extern const vf_info_t vf_info_eq2;
  68 extern const vf_info_t vf_info_gradfun;
  69 extern const vf_info_t vf_info_halfpack;
  70 extern const vf_info_t vf_info_dint;
  71 extern const vf_info_t vf_info_1bpp;
  72 extern const vf_info_t vf_info_2xsai;
  73 extern const vf_info_t vf_info_unsharp;
  74 extern const vf_info_t vf_info_swapuv;
  75 extern const vf_info_t vf_info_il;
  76 extern const vf_info_t vf_info_fil;
  77 extern const vf_info_t vf_info_boxblur;
  78 extern const vf_info_t vf_info_sab;
  79 extern const vf_info_t vf_info_smartblur;
  80 extern const vf_info_t vf_info_perspective;
  81 extern const vf_info_t vf_info_down3dright;
  82 extern const vf_info_t vf_info_field;
  83 extern const vf_info_t vf_info_denoise3d;
  84 extern const vf_info_t vf_info_hqdn3d;
  85 extern const vf_info_t vf_info_detc;
  86 extern const vf_info_t vf_info_telecine;
  87 extern const vf_info_t vf_info_tinterlace;
  88 extern const vf_info_t vf_info_tfields;
  89 extern const vf_info_t vf_info_ivtc;
  90 extern const vf_info_t vf_info_ilpack;
  91 extern const vf_info_t vf_info_dsize;
  92 extern const vf_info_t vf_info_decimate;
  93 extern const vf_info_t vf_info_softpulldown;
  94 extern const vf_info_t vf_info_pullup;
  95 extern const vf_info_t vf_info_filmdint;
  96 extern const vf_info_t vf_info_framestep;
  97 extern const vf_info_t vf_info_tile;
  98 extern const vf_info_t vf_info_delogo;
  99 extern const vf_info_t vf_info_remove_logo;
 100 extern const vf_info_t vf_info_hue;
 101 extern const vf_info_t vf_info_spp;
 102 extern const vf_info_t vf_info_uspp;
 103 extern const vf_info_t vf_info_fspp;
 104 extern const vf_info_t vf_info_pp7;
 105 extern const vf_info_t vf_info_yuvcsp;
 106 extern const vf_info_t vf_info_kerndeint;
 107 extern const vf_info_t vf_info_rgbtest;
 108 extern const vf_info_t vf_info_qp;
 109 extern const vf_info_t vf_info_phase;
 110 extern const vf_info_t vf_info_divtc;
 111 extern const vf_info_t vf_info_harddup;
 112 extern const vf_info_t vf_info_softskip;
 113 extern const vf_info_t vf_info_screenshot;
 114 extern const vf_info_t vf_info_ass;
 115 extern const vf_info_t vf_info_mcdeint;
 116 extern const vf_info_t vf_info_yadif;
 117 extern const vf_info_t vf_info_blackframe;
 118 extern const vf_info_t vf_info_geq;
 119 extern const vf_info_t vf_info_ow;
 120 extern const vf_info_t vf_info_fixpts;
 121
 122 // list of available filters:
 123 static const vf_info_t* const filter_list[]={
 124     &vf_info_rectangle,
 125 #ifdef HAVE_POSIX_SELECT
 126     &vf_info_bmovl,
 127 #endif
 128     &vf_info_crop,
 129     &vf_info_expand,
 130 #ifdef CONFIG_LIBPOSTPROC
 131     &vf_info_pp,
 132 #endif
 133     &vf_info_scale,
 134 //    &vf_info_osd,
 135     &vf_info_vo,
 136     &vf_info_format,
 137     &vf_info_noformat,
 138     &vf_info_flip,
 139 #ifdef CONFIG_LIBSWSCALE_INTERNALS
 140     &vf_info_rgb2bgr,
 141 #endif
 142     &vf_info_rotate,
 143     &vf_info_mirror,
 144 #ifdef CONFIG_LIBSWSCALE_INTERNALS
 145     &vf_info_palette,
 146 #endif
 147     &vf_info_pp7,
 148 #ifdef CONFIG_LIBAVCODEC
 149     &vf_info_lavc,
 150     &vf_info_lavcdeint,
 151     &vf_info_screenshot,
 152     &vf_info_uspp,
 153 #endif
 154 #ifdef CONFIG_ZR
 155     &vf_info_zrmjpeg,
 156 #endif
 157     &vf_info_dvbscale,
 158     &vf_info_cropdetect,
 159     &vf_info_test,
 160     &vf_info_noise,
 161     &vf_info_yvu9,
 162     &vf_info_eq,
 163     &vf_info_eq2,
 164     &vf_info_gradfun,
 165 #ifdef CONFIG_LIBSWSCALE_INTERNALS
 166     &vf_info_halfpack,
 167 #endif
 168     &vf_info_dint,
 169     &vf_info_1bpp,
 170     &vf_info_2xsai,
 171     &vf_info_unsharp,
 172     &vf_info_swapuv,
 173     &vf_info_il,
 174     &vf_info_fil,
 175     &vf_info_boxblur,
 176     &vf_info_sab,
 177     &vf_info_smartblur,
 178     &vf_info_perspective,
 179     &vf_info_down3dright,
 180     &vf_info_field,
 181     &vf_info_denoise3d,
 182     &vf_info_hqdn3d,
 183     &vf_info_detc,
 184     &vf_info_telecine,
 185     &vf_info_tinterlace,
 186     &vf_info_tfields,
 187     &vf_info_ivtc,
 188     &vf_info_ilpack,
 189     &vf_info_dsize,
 190     &vf_info_decimate,
 191     &vf_info_softpulldown,
 192     &vf_info_pullup,
 193     &vf_info_filmdint,
 194     &vf_info_framestep,
 195     &vf_info_tile,
 196     &vf_info_delogo,
 197     &vf_info_remove_logo,
 198     &vf_info_hue,
 199 #ifdef CONFIG_LIBAVCODEC_INTERNALS
 200     &vf_info_spp,
 201     &vf_info_fspp,
 202     &vf_info_qp,
 203     &vf_info_mcdeint,
 204     &vf_info_geq,
 205 #endif
 206     &vf_info_yuvcsp,
 207     &vf_info_kerndeint,
 208     &vf_info_rgbtest,
 209     &vf_info_phase,
 210     &vf_info_divtc,
 211     &vf_info_harddup,
 212     &vf_info_softskip,
 213 #ifdef CONFIG_ASS
 214     &vf_info_ass,
 215 #endif
 216     &vf_info_yadif,
 217     &vf_info_blackframe,
 218     &vf_info_ow,
 219     &vf_info_fixpts,
 220     NULL
 221 };
 222
 223 // For the vf option
 224 const m_obj_list_t vf_obj_list = {
 225   (void**)filter_list,
 226   M_ST_OFF(vf_info_t,name),
 227   M_ST_OFF(vf_info_t,info),
 228   M_ST_OFF(vf_info_t,opts)
 229 };
 230
 231 //============================================================================
 232 // mpi stuff:
 233
 234 void vf_mpi_clear(mp_image_t* mpi,int x0,int y0,int w,int h){
 235     int y;
 236     if(mpi->flags&MP_IMGFLAG_PLANAR){
 237         y0&=~1;h+=h&1;
 238         if(x0==0 && w==mpi->width){
 239             // full width clear:
 240             memset(mpi->planes[0]+mpi->stride[0]*y0,0,mpi->stride[0]*h);
 241             memset(mpi->planes[1]+mpi->stride[1]*(y0>>mpi->chroma_y_shift),128,mpi->stride[1]*(h>>mpi->chroma_y_shift));
 242             memset(mpi->planes[2]+mpi->stride[2]*(y0>>mpi->chroma_y_shift),128,mpi->stride[2]*(h>>mpi->chroma_y_shift));
 243         } else
 244         for(y=y0;y<y0+h;y+=2){
 245             memset(mpi->planes[0]+x0+mpi->stride[0]*y,0,w);
 246             memset(mpi->planes[0]+x0+mpi->stride[0]*(y+1),0,w);
 247             memset(mpi->planes[1]+(x0>>mpi->chroma_x_shift)+mpi->stride[1]*(y>>mpi->chroma_y_shift),128,(w>>mpi->chroma_x_shift));
 248             memset(mpi->planes[2]+(x0>>mpi->chroma_x_shift)+mpi->stride[2]*(y>>mpi->chroma_y_shift),128,(w>>mpi->chroma_x_shift));
 249         }
 250         return;
 251     }
 252     // packed:
 253     for(y=y0;y<y0+h;y++){
 254         unsigned char* dst=mpi->planes[0]+mpi->stride[0]*y+(mpi->bpp>>3)*x0;
 255         if(mpi->flags&MP_IMGFLAG_YUV){
 256             unsigned int* p=(unsigned int*) dst;
 257             int size=(mpi->bpp>>3)*w/4;
 258             int i;
 259 #if HAVE_BIGENDIAN
 260 #define CLEAR_PACKEDYUV_PATTERN 0x00800080
 261 #define CLEAR_PACKEDYUV_PATTERN_SWAPPED 0x80008000
 262 #else
 263 #define CLEAR_PACKEDYUV_PATTERN 0x80008000
 264 #define CLEAR_PACKEDYUV_PATTERN_SWAPPED 0x00800080
 265 #endif
 266             if(mpi->flags&MP_IMGFLAG_SWAPPED){
 267                 for(i=0;i<size-3;i+=4) p[i]=p[i+1]=p[i+2]=p[i+3]=CLEAR_PACKEDYUV_PATTERN_SWAPPED;
 268                 for(;i<size;i++) p[i]=CLEAR_PACKEDYUV_PATTERN_SWAPPED;
 269             } else {
 270                 for(i=0;i<size-3;i+=4) p[i]=p[i+1]=p[i+2]=p[i+3]=CLEAR_PACKEDYUV_PATTERN;
 271                 for(;i<size;i++) p[i]=CLEAR_PACKEDYUV_PATTERN;
 272             }
 273         } else
 274             memset(dst,0,(mpi->bpp>>3)*w);
 275     }
 276 }
 277
 278 mp_image_t* vf_get_image(vf_instance_t* vf, unsigned int outfmt, int mp_imgtype, int mp_imgflag, int w, int h){
 279   mp_image_t* mpi=NULL;
 280   int w2;
 281   int number = mp_imgtype >> 16;
 282
 283 #ifdef MP_DEBUG
 284   assert(w == -1 || w >= vf->w);
 285   assert(h == -1 || h >= vf->h);
 286   assert(vf->w > 0);
 287   assert(vf->h > 0);
 288 #endif
 289
 290 //  fprintf(stderr, "get_image: %d:%d, vf: %d:%d\n", w,h,vf->w,vf->h);
 291
 292   if (w == -1) w = vf->w;
 293   if (h == -1) h = vf->h;
 294
 295   w2=(mp_imgflag&MP_IMGFLAG_ACCEPT_ALIGNED_STRIDE)?((w+15)&(~15)):w;
 296
 297   if(vf->put_image==vf_next_put_image){
 298       // passthru mode, if the filter uses the fallback/default put_image() code
 299       return vf_get_image(vf->next,outfmt,mp_imgtype,mp_imgflag,w,h);
 300   }
 301
 302   // Note: we should call libvo first to check if it supports direct rendering
 303   // and if not, then fallback to software buffers:
 304   switch(mp_imgtype & 0xff){
 305   case MP_IMGTYPE_EXPORT:
 306     if(!vf->imgctx.export_images[0]) vf->imgctx.export_images[0]=new_mp_image(w2,h);
 307     mpi=vf->imgctx.export_images[0];
 308     break;
 309   case MP_IMGTYPE_STATIC:
 310     if(!vf->imgctx.static_images[0]) vf->imgctx.static_images[0]=new_mp_image(w2,h);
 311     mpi=vf->imgctx.static_images[0];
 312     break;
 313   case MP_IMGTYPE_TEMP:
 314     if(!vf->imgctx.temp_images[0]) vf->imgctx.temp_images[0]=new_mp_image(w2,h);
 315     mpi=vf->imgctx.temp_images[0];
 316     break;
 317   case MP_IMGTYPE_IPB:
 318     if(!(mp_imgflag&MP_IMGFLAG_READABLE)){ // B frame:
 319       if(!vf->imgctx.temp_images[0]) vf->imgctx.temp_images[0]=new_mp_image(w2,h);
 320       mpi=vf->imgctx.temp_images[0];
 321       break;
 322     }
 323   case MP_IMGTYPE_IP:
 324     if(!vf->imgctx.static_images[vf->imgctx.static_idx]) vf->imgctx.static_images[vf->imgctx.static_idx]=new_mp_image(w2,h);
 325     mpi=vf->imgctx.static_images[vf->imgctx.static_idx];
 326     vf->imgctx.static_idx^=1;
 327     break;
 328   case MP_IMGTYPE_NUMBERED:
 329     if (number == -1) {
 330       int i;
 331       for (i = 0; i < NUM_NUMBERED_MPI; i++)
 332         if (!vf->imgctx.numbered_images[i] || !vf->imgctx.numbered_images[i]->usage_count)
 333           break;
 334       number = i;
 335     }
 336     if (number < 0 || number >= NUM_NUMBERED_MPI) return NULL;
 337     if (!vf->imgctx.numbered_images[number]) vf->imgctx.numbered_images[number] = new_mp_image(w2,h);
 338     mpi = vf->imgctx.numbered_images[number];
 339     mpi->number = number;
 340     break;
 341   }
 342   if(mpi){
 343     mpi->type=mp_imgtype;
 344     mpi->w=vf->w; mpi->h=vf->h;
 345     // keep buffer allocation status & color flags only:
 346 //    mpi->flags&=~(MP_IMGFLAG_PRESERVE|MP_IMGFLAG_READABLE|MP_IMGFLAG_DIRECT);
 347     mpi->flags&=MP_IMGFLAG_ALLOCATED|MP_IMGFLAG_TYPE_DISPLAYED|MP_IMGFLAGMASK_COLORS;
 348     // accept restrictions, draw_slice and palette flags only:
 349     mpi->flags|=mp_imgflag&(MP_IMGFLAGMASK_RESTRICTIONS|MP_IMGFLAG_DRAW_CALLBACK|MP_IMGFLAG_RGB_PALETTE);
 350     if(!vf->draw_slice) mpi->flags&=~MP_IMGFLAG_DRAW_CALLBACK;
 351     if(mpi->width!=w2 || mpi->height!=h){
 352 //      printf("vf.c: MPI parameters changed!  %dx%d -> %dx%d   \n", mpi->width,mpi->height,w2,h);
 353         if(mpi->flags&MP_IMGFLAG_ALLOCATED){
 354             if(mpi->width<w2 || mpi->height<h){
 355                 // need to re-allocate buffer memory:
 356                 av_free(mpi->planes[0]);
 357                 mpi->flags&=~MP_IMGFLAG_ALLOCATED;
 358                 mp_msg(MSGT_VFILTER,MSGL_V,"vf.c: have to REALLOCATE buffer memory :(\n");
 359             }
 360 //      } else {
 361         } {
 362             mpi->width=w2; mpi->chroma_width=(w2 + (1<<mpi->chroma_x_shift) - 1)>>mpi->chroma_x_shift;
 363             mpi->height=h; mpi->chroma_height=(h + (1<<mpi->chroma_y_shift) - 1)>>mpi->chroma_y_shift;
 364         }
 365     }
 366     if(!mpi->bpp) mp_image_setfmt(mpi,outfmt);
 367     if(!(mpi->flags&MP_IMGFLAG_ALLOCATED) && mpi->type>MP_IMGTYPE_EXPORT){
 368
 369         // check libvo first!
 370         if(vf->get_image) vf->get_image(vf,mpi);
 371
 372         if(!(mpi->flags&MP_IMGFLAG_DIRECT)){
 373           // non-direct and not yet allocated image. allocate it!
 374           if (!mpi->bpp) { // no way we can allocate this
 375               mp_msg(MSGT_DECVIDEO, MSGL_FATAL,
 376                      "vf_get_image: Tried to allocate a format that can not be allocated!\n");
 377               return NULL;
 378           }
 379
 380           // check if codec prefer aligned stride:
 381           if(mp_imgflag&MP_IMGFLAG_PREFER_ALIGNED_STRIDE){
 382               int align=(mpi->flags&MP_IMGFLAG_PLANAR &&
 383                          mpi->flags&MP_IMGFLAG_YUV) ?
 384                          (8<<mpi->chroma_x_shift)-1 : 15; // -- maybe FIXME
 385               w2=((w+align)&(~align));
 386               if(mpi->width!=w2){
 387                   // we have to change width... check if we CAN co it:
 388                   int flags=vf->query_format(vf,outfmt); // should not fail
 389                   if(!(flags&3)) mp_msg(MSGT_DECVIDEO,MSGL_WARN,"??? vf_get_image{vf->query_format(outfmt)} failed!\n");
 390 //                printf("query -> 0x%X    \n",flags);
 391                   if(flags&VFCAP_ACCEPT_STRIDE){
 392                       mpi->width=w2;
 393                       mpi->chroma_width=(w2 + (1<<mpi->chroma_x_shift) - 1)>>mpi->chroma_x_shift;
 394                   }
 395               }
 396           }
 397
 398           mp_image_alloc_planes(mpi);
 399 //        printf("clearing img!\n");
 400           vf_mpi_clear(mpi,0,0,mpi->width,mpi->height);
 401         }
 402     }
 403     if(mpi->flags&MP_IMGFLAG_DRAW_CALLBACK)
 404         if(vf->start_slice) vf->start_slice(vf,mpi);
 405     if(!(mpi->flags&MP_IMGFLAG_TYPE_DISPLAYED)){
 406             mp_msg(MSGT_DECVIDEO,MSGL_V,"*** [%s] %s%s mp_image_t, %dx%dx%dbpp %s %s, %d bytes\n",
 407                   vf->info->name,
 408                   (mpi->type==MP_IMGTYPE_EXPORT)?"Exporting":
 409                   ((mpi->flags&MP_IMGFLAG_DIRECT)?"Direct Rendering":"Allocating"),
 410                   (mpi->flags&MP_IMGFLAG_DRAW_CALLBACK)?" (slices)":"",
 411                   mpi->width,mpi->height,mpi->bpp,
 412                   (mpi->flags&MP_IMGFLAG_YUV)?"YUV":((mpi->flags&MP_IMGFLAG_SWAPPED)?"BGR":"RGB"),
 413                   (mpi->flags&MP_IMGFLAG_PLANAR)?"planar":"packed",
 414                   mpi->bpp*mpi->width*mpi->height/8);
 415             mp_msg(MSGT_DECVIDEO,MSGL_DBG2,"(imgfmt: %x, planes: %p,%p,%p strides: %d,%d,%d, chroma: %dx%d, shift: h:%d,v:%d)\n",
 416                 mpi->imgfmt, mpi->planes[0], mpi->planes[1], mpi->planes[2],
 417                 mpi->stride[0], mpi->stride[1], mpi->stride[2],
 418                 mpi->chroma_width, mpi->chroma_height, mpi->chroma_x_shift, mpi->chroma_y_shift);
 419             mpi->flags|=MP_IMGFLAG_TYPE_DISPLAYED;
 420     }
 421
 422   mpi->qscale = NULL;
 423   }
 424   mpi->usage_count++;
 425 //    printf("\rVF_MPI: %p %p %p %d %d %d    \n",
 426 //      mpi->planes[0],mpi->planes[1],mpi->planes[2],
 427 //      mpi->stride[0],mpi->stride[1],mpi->stride[2]);
 428   return mpi;
 429 }
 430
 431 //============================================================================
 432
 433 // By default vf doesn't accept MPEGPES
 434 static int vf_default_query_format(struct vf_instance *vf, unsigned int fmt){
 435   if(fmt == IMGFMT_MPEGPES) return 0;
 436   return vf_next_query_format(vf,fmt);
 437 }
 438
 439 struct vf_instance *vf_open_plugin_noerr(struct MPOpts *opts,
 440                                          const vf_info_t * const *filter_list,
 441                                          vf_instance_t *next, const char *name,
 442                                          char **args, int *retcode)
 443 {
 444     vf_instance_t* vf;
 445     int i;
 446     for(i=0;;i++){
 447         if(!filter_list[i]){
 448             mp_tmsg(MSGT_VFILTER,MSGL_ERR,"Couldn't find video filter '%s'.\n",name);
 449             return NULL; // no such filter!
 450         }
 451         if(!strcmp(filter_list[i]->name,name)) break;
 452     }
 453     vf = calloc(1, sizeof *vf);
 454     vf->opts = opts;
 455     vf->info=filter_list[i];
 456     vf->next=next;
 457     vf->config=vf_next_config;
 458     vf->control=vf_next_control;
 459     vf->query_format=vf_default_query_format;
 460     vf->put_image=vf_next_put_image;
 461     vf->default_caps=VFCAP_ACCEPT_STRIDE;
 462     vf->default_reqs=0;
 463     if(vf->info->opts) { // vf_vo get some special argument
 464       const m_struct_t* st = vf->info->opts;
 465       void* vf_priv = m_struct_alloc(st);
 466       int n;
 467       for(n = 0 ; args && args[2*n] ; n++)
 468         m_struct_set(st,vf_priv,args[2*n],args[2*n+1]);
 469       vf->priv = vf_priv;
 470       args = NULL;
 471     } else // Otherwise we should have the '_oldargs_'
 472       if(args && !strcmp(args[0],"_oldargs_"))
 473         args = (char**)args[1];
 474       else
 475         args = NULL;
 476     *retcode = vf->info->vf_open(vf,(char*)args);
 477     if (*retcode > 0)
 478         return vf;
 479     free(vf);
 480     return NULL;
 481 }
 482
 483 struct vf_instance *vf_open_plugin(struct MPOpts *opts,
 484                                    const vf_info_t * const *filter_list,
 485                                    vf_instance_t *next, const char *name,
 486                                    char **args)
 487 {
 488     struct vf_instance *vf = vf_open_plugin_noerr(opts, filter_list, next,
 489                                                   name, args, &(int){0});
 490     if (!vf)
 491         mp_tmsg(MSGT_VFILTER, MSGL_ERR, "Couldn't open video filter '%s'.\n",
 492                 name);
 493     return vf;
 494 }
 495
 496 vf_instance_t* vf_open_filter(struct MPOpts *opts, vf_instance_t* next, const char *name, char **args){
 497   if(args && strcmp(args[0],"_oldargs_")) {
 498     int i,l = 0;
 499     for(i = 0 ; args && args[2*i] ; i++)
 500       l += 1 + strlen(args[2*i]) + 1 + strlen(args[2*i+1]);
 501     l += strlen(name);
 502     {
 503       char str[l+1];
 504       char* p = str;
 505       p += sprintf(str,"%s",name);
 506       for(i = 0 ; args && args[2*i] ; i++)
 507         p += sprintf(p," %s=%s",args[2*i],args[2*i+1]);
 508       mp_msg(MSGT_VFILTER, MSGL_INFO, "%s[%s]\n",
 509              mp_gtext("Opening video filter: "), str);
 510     }
 511   } else if(strcmp(name,"vo")) {
 512     if(args && strcmp(args[0],"_oldargs_") == 0)
 513         mp_msg(MSGT_VFILTER, MSGL_INFO, "%s[%s=%s]\n",
 514                mp_gtext("Opening video filter: "), name, args[1]);
 515     else
 516         mp_msg(MSGT_VFILTER, MSGL_INFO, "%s[%s]\n",
 517                mp_gtext("Opening video filter: "), name);
 518   }
 519   return vf_open_plugin(opts, filter_list,next,name,args);
 520 }
 521
 522 /**
 523  * \brief adds a filter before the last one (which should be the vo filter).
 524  * \param vf start of the filter chain.
 525  * \param name name of the filter to add.
 526  * \param args argument list for the filter.
 527  * \return pointer to the filter instance that was created.
 528  */
 529 vf_instance_t* vf_add_before_vo(vf_instance_t **vf, char *name, char **args) {
 530   struct MPOpts *opts = (*vf)->opts;
 531   vf_instance_t *vo, *prev = NULL, *new;
 532   // Find the last filter (should be vf_vo)
 533   for (vo = *vf; vo->next; vo = vo->next)
 534     prev = vo;
 535   new = vf_open_filter(opts, vo, name, args);
 536   if (prev)
 537     prev->next = new;
 538   else
 539     *vf = new;
 540   return new;
 541 }
 542
 543 //============================================================================
 544
 545 unsigned int vf_match_csp(vf_instance_t** vfp,const unsigned int* list,unsigned int preferred){
 546     vf_instance_t* vf=*vfp;
 547     struct MPOpts *opts = vf->opts;
 548     const unsigned int* p;
 549     unsigned int best=0;
 550     int ret;
 551     if((p=list)) while(*p){
 552         ret=vf->query_format(vf,*p);
 553         mp_msg(MSGT_VFILTER,MSGL_V,"[%s] query(%s) -> %d\n",vf->info->name,vo_format_name(*p),ret&3);
 554         if(ret&2){ best=*p; break;} // no conversion -> bingo!
 555         if(ret&1 && !best) best=*p; // best with conversion
 556         ++p;
 557     }
 558     if(best) return best; // bingo, they have common csp!
 559     // ok, then try with scale:
 560     if(vf->info == &vf_info_scale) return 0; // avoid infinite recursion!
 561     vf=vf_open_filter(opts, vf,"scale",NULL);
 562     if(!vf) return 0; // failed to init "scale"
 563     // try the preferred csp first:
 564     if(preferred && vf->query_format(vf,preferred)) best=preferred; else
 565     // try the list again, now with "scaler" :
 566     if((p=list)) while(*p){
 567         ret=vf->query_format(vf,*p);
 568         mp_msg(MSGT_VFILTER,MSGL_V,"[%s] query(%s) -> %d\n",vf->info->name,vo_format_name(*p),ret&3);
 569         if(ret&2){ best=*p; break;} // no conversion -> bingo!
 570         if(ret&1 && !best) best=*p; // best with conversion
 571         ++p;
 572     }
 573     if(best) *vfp=vf; // else uninit vf  !FIXME!
 574     return best;
 575 }
 576
 577 void vf_clone_mpi_attributes(mp_image_t* dst, mp_image_t* src){
 578     dst->pict_type= src->pict_type;
 579     dst->fields = src->fields;
 580     dst->qscale_type= src->qscale_type;
 581     if(dst->width == src->width && dst->height == src->height){
 582         dst->qstride= src->qstride;
 583         dst->qscale= src->qscale;
 584     }
 585 }
 586
 587 void vf_queue_frame(vf_instance_t *vf, int (*func)(vf_instance_t *))
 588 {
 589     vf->continue_buffered_image = func;
 590 }
 591
 592 // Output the next buffered image (if any) from the filter chain.
 593 // The queue could be kept as a simple stack/list instead avoiding the
 594 // looping here, but there's currently no good context variable where
 595 // that could be stored so this was easier to implement.
 596
 597 int vf_output_queued_frame(vf_instance_t *vf)
 598 {
 599     while (1) {
 600         int ret;
 601         vf_instance_t *current;
 602         vf_instance_t *last=NULL;
 603         int (*tmp)(vf_instance_t *);
 604         for (current = vf; current; current = current->next)
 605             if (current->continue_buffered_image)
 606                 last = current;
 607         if (!last)
 608             return 0;
 609         tmp = last->continue_buffered_image;
 610         last->continue_buffered_image = NULL;
 611         ret = tmp(last);
 612         if (ret)
 613             return ret;
 614     }
 615 }
 616
 617
 618 /**
 619  * \brief Video config() function wrapper
 620  *
 621  * Blocks config() calls with different size or format for filters
 622  * with VFCAP_CONSTANT
 623  *
 624  * First call is redirected to vf->config.
 625  *
 626  * In following calls, it verifies that the configuration parameters
 627  * are unchanged, and returns either success or error.
 628  *
 629 */
 630 int vf_config_wrapper(struct vf_instance *vf,
 631                     int width, int height, int d_width, int d_height,
 632                     unsigned int flags, unsigned int outfmt)
 633 {
 634     int r;
 635     if ((vf->default_caps&VFCAP_CONSTANT) && vf->fmt.have_configured) {
 636         if ((vf->fmt.orig_width != width)
 637             || (vf->fmt.orig_height != height)
 638             || (vf->fmt.orig_fmt != outfmt)) {
 639             mp_tmsg(MSGT_VFILTER,MSGL_ERR,"\nNew video file has different resolution or colorspace than the previous one.\n");
 640             return 0;
 641         }
 642         return 1;
 643     }
 644     vf->fmt.have_configured = 1;
 645     vf->fmt.orig_height = height;
 646     vf->fmt.orig_width = width;
 647     vf->fmt.orig_fmt = outfmt;
 648     r = vf->config(vf, width, height, d_width, d_height, flags, outfmt);
 649     if (!r) vf->fmt.have_configured = 0;
 650     return r;
 651 }
 652
 653 int vf_next_config(struct vf_instance *vf,
 654         int width, int height, int d_width, int d_height,
 655         unsigned int voflags, unsigned int outfmt){
 656     struct MPOpts *opts = vf->opts;
 657     int miss;
 658     int flags=vf->next->query_format(vf->next,outfmt);
 659     if(!flags){
 660         // hmm. colorspace mismatch!!!
 661         // let's insert the 'scale' filter, it does the job for us:
 662         vf_instance_t* vf2;
 663         if(vf->next->info==&vf_info_scale) return 0; // scale->scale
 664         vf2=vf_open_filter(opts, vf->next,"scale",NULL);
 665         if(!vf2) return 0; // shouldn't happen!
 666         vf->next=vf2;
 667         flags=vf->next->query_format(vf->next,outfmt);
 668         if(!flags){
 669             mp_tmsg(MSGT_VFILTER,MSGL_ERR,"Cannot find matching colorspace, even by inserting 'scale' :(\n");
 670             return 0; // FAIL
 671         }
 672     }
 673     mp_msg(MSGT_VFILTER,MSGL_V,"REQ: flags=0x%X  req=0x%X  \n",flags,vf->default_reqs);
 674     miss=vf->default_reqs - (flags&vf->default_reqs);
 675     if(miss&VFCAP_ACCEPT_STRIDE){
 676         // vf requires stride support but vf->next doesn't support it!
 677         // let's insert the 'expand' filter, it does the job for us:
 678         vf_instance_t* vf2=vf_open_filter(opts, vf->next,"expand",NULL);
 679         if(!vf2) return 0; // shouldn't happen!
 680         vf->next=vf2;
 681     }
 682     vf->next->w = width; vf->next->h = height;
 683     return vf_config_wrapper(vf->next,width,height,d_width,d_height,voflags,outfmt);
 684 }
 685
 686 int vf_next_control(struct vf_instance *vf, int request, void* data){
 687     return vf->next->control(vf->next,request,data);
 688 }
 689
 690 int vf_next_query_format(struct vf_instance *vf, unsigned int fmt){
 691     int flags=vf->next->query_format(vf->next,fmt);
 692     if(flags) flags|=vf->default_caps;
 693     return flags;
 694 }
 695
 696 int vf_next_put_image(struct vf_instance *vf,mp_image_t *mpi, double pts){
 697     return vf->next->put_image(vf->next,mpi, pts);
 698 }
 699
 700 void vf_next_draw_slice(struct vf_instance *vf,unsigned char** src, int * stride,int w, int h, int x, int y){
 701     if (vf->next->draw_slice) {
 702         vf->next->draw_slice(vf->next,src,stride,w,h,x,y);
 703         return;
 704     }
 705     if (!vf->dmpi) {
 706         mp_msg(MSGT_VFILTER,MSGL_ERR,"draw_slice: dmpi not stored by vf_%s\n", vf->info->name);
 707         return;
 708     }
 709     if (!(vf->dmpi->flags & MP_IMGFLAG_PLANAR)) {
 710         memcpy_pic(vf->dmpi->planes[0]+y*vf->dmpi->stride[0]+vf->dmpi->bpp/8*x,
 711             src[0], vf->dmpi->bpp/8*w, h, vf->dmpi->stride[0], stride[0]);
 712         return;
 713     }
 714     memcpy_pic(vf->dmpi->planes[0]+y*vf->dmpi->stride[0]+x, src[0],
 715         w, h, vf->dmpi->stride[0], stride[0]);
 716     memcpy_pic(vf->dmpi->planes[1]+(y>>vf->dmpi->chroma_y_shift)*vf->dmpi->stride[1]+(x>>vf->dmpi->chroma_x_shift),
 717         src[1], w>>vf->dmpi->chroma_x_shift, h>>vf->dmpi->chroma_y_shift, vf->dmpi->stride[1], stride[1]);
 718     memcpy_pic(vf->dmpi->planes[2]+(y>>vf->dmpi->chroma_y_shift)*vf->dmpi->stride[2]+(x>>vf->dmpi->chroma_x_shift),
 719         src[2], w>>vf->dmpi->chroma_x_shift, h>>vf->dmpi->chroma_y_shift, vf->dmpi->stride[2], stride[2]);
 720 }
 721
 722 //============================================================================
 723
 724 vf_instance_t *append_filters(vf_instance_t* last,
 725                               struct m_obj_settings *vf_settings)
 726 {
 727   struct MPOpts *opts = last->opts;
 728   vf_instance_t* vf;
 729   int i;
 730
 731   if(vf_settings) {
 732     // We want to add them in the 'right order'
 733     for(i = 0 ; vf_settings[i].name ; i++)
 734       /* NOP */;
 735     for(i-- ; i >= 0 ; i--) {
 736       //printf("Open filter %s\n",vf_settings[i].name);
 737       vf = vf_open_filter(opts, last,vf_settings[i].name,vf_settings[i].attribs);
 738       if(vf) last=vf;
 739     }
 740   }
 741   return last;
 742 }
 743
 744 //============================================================================
 745
 746 void vf_uninit_filter(vf_instance_t* vf){
 747     if(vf->uninit) vf->uninit(vf);
 748     free_mp_image(vf->imgctx.static_images[0]);
 749     free_mp_image(vf->imgctx.static_images[1]);
 750     free_mp_image(vf->imgctx.temp_images[0]);
 751     free_mp_image(vf->imgctx.export_images[0]);
 752     for (int i = 0; i < NUM_NUMBERED_MPI; i++)
 753         free_mp_image(vf->imgctx.numbered_images[i]);
 754     free(vf);
 755 }
 756
 757 void vf_uninit_filter_chain(vf_instance_t* vf){
 758     while(vf){
 759         vf_instance_t* next=vf->next;
 760         vf_uninit_filter(vf);
 761         vf=next;
 762     }
 763 }