libmpcodecs/vf_scale.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <string.h>
   4 #include <inttypes.h>
   5
   6 #include "config.h"
   7 #include "mp_msg.h"
   8 #include "cpudetect.h"
   9 #include "options.h"
  10
  11 #include "img_format.h"
  12 #include "mp_image.h"
  13 #include "vf.h"
  14 #include "fmt-conversion.h"
  15 #include "mpbswap.h"
  16
  17 #include "libswscale/swscale.h"
  18 #include "vf_scale.h"
  19
  20 #include "m_option.h"
  21 #include "m_struct.h"
  22
  23 static struct vf_priv_s {
  24     int w,h;
  25     int v_chr_drop;
  26     double param[2];
  27     unsigned int fmt;
  28     struct SwsContext *ctx;
  29     struct SwsContext *ctx2; //for interlaced slices only
  30     unsigned char* palette;
  31     int interlaced;
  32     int noup;
  33     int accurate_rnd;
  34     int query_format_cache[64];
  35 } const vf_priv_dflt = {
  36   -1,-1,
  37   0,
  38   {SWS_PARAM_DEFAULT, SWS_PARAM_DEFAULT},
  39   0,
  40   NULL,
  41   NULL,
  42   NULL
  43 };
  44
  45 //===========================================================================//
  46
  47 void sws_getFlagsAndFilterFromCmdLine(int *flags, SwsFilter **srcFilterParam, SwsFilter **dstFilterParam);
  48
  49 static const unsigned int outfmt_list[]={
  50 // YUV:
  51     IMGFMT_444P,
  52     IMGFMT_422P,
  53     IMGFMT_YV12,
  54     IMGFMT_I420,
  55     IMGFMT_IYUV,
  56     IMGFMT_YVU9,
  57     IMGFMT_IF09,
  58     IMGFMT_411P,
  59     IMGFMT_NV12,
  60     IMGFMT_NV21,
  61     IMGFMT_YUY2,
  62     IMGFMT_UYVY,
  63 // RGB and grayscale (Y8 and Y800):
  64     IMGFMT_BGR32,
  65     IMGFMT_RGB32,
  66     IMGFMT_BGR24,
  67     IMGFMT_RGB24,
  68     IMGFMT_BGR16,
  69     IMGFMT_RGB16,
  70     IMGFMT_BGR15,
  71     IMGFMT_RGB15,
  72     IMGFMT_Y800,
  73     IMGFMT_Y8,
  74     IMGFMT_BGR8,
  75     IMGFMT_RGB8,
  76     IMGFMT_BGR4,
  77     IMGFMT_RGB4,
  78     IMGFMT_BG4B,
  79     IMGFMT_RG4B,
  80     IMGFMT_BGR1,
  81     IMGFMT_RGB1,
  82     0
  83 };
  84
  85 static unsigned int find_best_out(vf_instance_t *vf){
  86     unsigned int best=0;
  87     int i;
  88
  89     // find the best outfmt:
  90     for(i=0; i<sizeof(outfmt_list)/sizeof(int)-1; i++){
  91         const int format= outfmt_list[i];
  92         int ret= vf->priv->query_format_cache[i]-1;
  93         if(ret == -1){
  94             ret= vf_next_query_format(vf, outfmt_list[i]);
  95             vf->priv->query_format_cache[i]= ret+1;
  96         }
  97
  98         mp_msg(MSGT_VFILTER,MSGL_DBG2,"scale: query(%s) -> %d\n",vo_format_name(format),ret&3);
  99         if(ret&VFCAP_CSP_SUPPORTED_BY_HW){
 100             best=format; // no conversion -> bingo!
 101             break;
 102         }
 103         if(ret&VFCAP_CSP_SUPPORTED && !best)
 104             best=format; // best with conversion
 105     }
 106     return best;
 107 }
 108
 109 static int config(struct vf_instance* vf,
 110         int width, int height, int d_width, int d_height,
 111         unsigned int flags, unsigned int outfmt){
 112     struct MPOpts *opts = vf->opts;
 113     unsigned int best=find_best_out(vf);
 114     int vo_flags;
 115     int int_sws_flags=0;
 116     int round_w=0, round_h=0;
 117     int i;
 118     SwsFilter *srcFilter, *dstFilter;
 119     enum PixelFormat dfmt, sfmt;
 120
 121     if(!best){
 122         mp_msg(MSGT_VFILTER,MSGL_WARN,"SwScale: no supported outfmt found :(\n");
 123         return 0;
 124     }
 125     sfmt = imgfmt2pixfmt(outfmt);
 126     if (outfmt == IMGFMT_RGB8 || outfmt == IMGFMT_BGR8) sfmt = PIX_FMT_PAL8;
 127     dfmt = imgfmt2pixfmt(best);
 128
 129     vo_flags=vf->next->query_format(vf->next,best);
 130
 131     // scaling to dwidth*d_height, if all these TRUE:
 132     // - option -zoom
 133     // - no other sw/hw up/down scaling avail.
 134     // - we're after postproc
 135     // - user didn't set w:h
 136     if(!(vo_flags&VFCAP_POSTPROC) && (flags&4) &&
 137             vf->priv->w<0 && vf->priv->h<0){    // -zoom
 138         int x=(vo_flags&VFCAP_SWSCALE) ? 0 : 1;
 139         if(d_width<width || d_height<height){
 140             // downscale!
 141             if(vo_flags&VFCAP_HWSCALE_DOWN) x=0;
 142         } else {
 143             // upscale:
 144             if(vo_flags&VFCAP_HWSCALE_UP) x=0;
 145         }
 146         if(x){
 147             // user wants sw scaling! (-zoom)
 148             vf->priv->w=d_width;
 149             vf->priv->h=d_height;
 150         }
 151     }
 152
 153     if(vf->priv->noup){
 154         if((vf->priv->w > width) + (vf->priv->h > height) >= vf->priv->noup){
 155             vf->priv->w= width;
 156             vf->priv->h= height;
 157         }
 158     }
 159
 160     if (vf->priv->w <= -8) {
 161       vf->priv->w += 8;
 162       round_w = 1;
 163     }
 164     if (vf->priv->h <= -8) {
 165       vf->priv->h += 8;
 166       round_h = 1;
 167     }
 168
 169     if (vf->priv->w < -3 || vf->priv->h < -3 ||
 170          (vf->priv->w < -1 && vf->priv->h < -1)) {
 171       // TODO: establish a direct connection to the user's brain
 172       // and find out what the heck he thinks MPlayer should do
 173       // with this nonsense.
 174       mp_msg(MSGT_VFILTER, MSGL_ERR, "SwScale: EUSERBROKEN Check your parameters, they make no sense!\n");
 175       return 0;
 176     }
 177
 178     if (vf->priv->w == -1)
 179       vf->priv->w = width;
 180     if (vf->priv->w == 0)
 181       vf->priv->w = d_width;
 182
 183     if (vf->priv->h == -1)
 184       vf->priv->h = height;
 185     if (vf->priv->h == 0)
 186       vf->priv->h = d_height;
 187
 188     if (vf->priv->w == -3)
 189       vf->priv->w = vf->priv->h * width / height;
 190     if (vf->priv->w == -2)
 191       vf->priv->w = vf->priv->h * d_width / d_height;
 192
 193     if (vf->priv->h == -3)
 194       vf->priv->h = vf->priv->w * height / width;
 195     if (vf->priv->h == -2)
 196       vf->priv->h = vf->priv->w * d_height / d_width;
 197
 198     if (round_w)
 199       vf->priv->w = ((vf->priv->w + 8) / 16) * 16;
 200     if (round_h)
 201       vf->priv->h = ((vf->priv->h + 8) / 16) * 16;
 202
 203     // calculate the missing parameters:
 204     switch(best) {
 205     case IMGFMT_YV12:           /* YV12 needs w & h rounded to 2 */
 206     case IMGFMT_I420:
 207     case IMGFMT_IYUV:
 208     case IMGFMT_NV12:
 209     case IMGFMT_NV21:
 210       vf->priv->h = (vf->priv->h + 1) & ~1;
 211     case IMGFMT_YUY2:           /* YUY2 needs w rounded to 2 */
 212     case IMGFMT_UYVY:
 213       vf->priv->w = (vf->priv->w + 1) & ~1;
 214     }
 215
 216     mp_msg(MSGT_VFILTER,MSGL_DBG2,"SwScale: scaling %dx%d %s to %dx%d %s  \n",
 217         width,height,vo_format_name(outfmt),
 218         vf->priv->w,vf->priv->h,vo_format_name(best));
 219
 220     // free old ctx:
 221     if(vf->priv->ctx) sws_freeContext(vf->priv->ctx);
 222     if(vf->priv->ctx2)sws_freeContext(vf->priv->ctx2);
 223
 224     // new swscaler:
 225     sws_getFlagsAndFilterFromCmdLine(&int_sws_flags, &srcFilter, &dstFilter);
 226     int_sws_flags|= vf->priv->v_chr_drop << SWS_SRC_V_CHR_DROP_SHIFT;
 227     int_sws_flags|= vf->priv->accurate_rnd * SWS_ACCURATE_RND;
 228     vf->priv->ctx=sws_getContext(width, height >> vf->priv->interlaced,
 229             sfmt,
 230                   vf->priv->w, vf->priv->h >> vf->priv->interlaced,
 231             dfmt,
 232             int_sws_flags | get_sws_cpuflags(), srcFilter, dstFilter, vf->priv->param);
 233     if(vf->priv->interlaced){
 234         vf->priv->ctx2=sws_getContext(width, height >> 1,
 235             sfmt,
 236                   vf->priv->w, vf->priv->h >> 1,
 237             dfmt,
 238             int_sws_flags | get_sws_cpuflags(), srcFilter, dstFilter, vf->priv->param);
 239     }
 240     if(!vf->priv->ctx){
 241         // error...
 242         mp_msg(MSGT_VFILTER,MSGL_WARN,"Couldn't init SwScaler for this setup\n");
 243         return 0;
 244     }
 245     vf->priv->fmt=best;
 246
 247     if(vf->priv->palette){
 248         free(vf->priv->palette);
 249         vf->priv->palette=NULL;
 250     }
 251     switch(best){
 252     case IMGFMT_RGB8: {
 253       /* set 332 palette for 8 bpp */
 254         vf->priv->palette=malloc(4*256);
 255         for(i=0; i<256; i++){
 256             vf->priv->palette[4*i+0]=4*(i>>6)*21;
 257             vf->priv->palette[4*i+1]=4*((i>>3)&7)*9;
 258             vf->priv->palette[4*i+2]=4*((i&7)&7)*9;
 259             vf->priv->palette[4*i+3]=0;
 260         }
 261         break; }
 262     case IMGFMT_BGR8: {
 263       /* set 332 palette for 8 bpp */
 264         vf->priv->palette=malloc(4*256);
 265         for(i=0; i<256; i++){
 266             vf->priv->palette[4*i+0]=4*(i&3)*21;
 267             vf->priv->palette[4*i+1]=4*((i>>2)&7)*9;
 268             vf->priv->palette[4*i+2]=4*((i>>5)&7)*9;
 269             vf->priv->palette[4*i+3]=0;
 270         }
 271         break; }
 272     case IMGFMT_BGR4:
 273     case IMGFMT_BG4B: {
 274         vf->priv->palette=malloc(4*16);
 275         for(i=0; i<16; i++){
 276             vf->priv->palette[4*i+0]=4*(i&1)*63;
 277             vf->priv->palette[4*i+1]=4*((i>>1)&3)*21;
 278             vf->priv->palette[4*i+2]=4*((i>>3)&1)*63;
 279             vf->priv->palette[4*i+3]=0;
 280         }
 281         break; }
 282     case IMGFMT_RGB4:
 283     case IMGFMT_RG4B: {
 284         vf->priv->palette=malloc(4*16);
 285         for(i=0; i<16; i++){
 286             vf->priv->palette[4*i+0]=4*(i>>3)*63;
 287             vf->priv->palette[4*i+1]=4*((i>>1)&3)*21;
 288             vf->priv->palette[4*i+2]=4*((i&1)&1)*63;
 289             vf->priv->palette[4*i+3]=0;
 290         }
 291         break; }
 292     }
 293
 294     if (!opts->screen_size_x && !opts->screen_size_y
 295         && !(opts->screen_size_xy >= 0.001)) {
 296         // Compute new d_width and d_height, preserving aspect
 297         // while ensuring that both are >= output size in pixels.
 298         if (vf->priv->h * d_width > vf->priv->w * d_height) {
 299                 d_width = vf->priv->h * d_width / d_height;
 300                 d_height = vf->priv->h;
 301         } else {
 302                 d_height = vf->priv->w * d_height / d_width;
 303                 d_width = vf->priv->w;
 304         }
 305         //d_width=d_width*vf->priv->w/width;
 306         //d_height=d_height*vf->priv->h/height;
 307     }
 308     return vf_next_config(vf,vf->priv->w,vf->priv->h,d_width,d_height,flags,best);
 309 }
 310
 311 static void start_slice(struct vf_instance* vf, mp_image_t *mpi){
 312 //    printf("start_slice called! flag=%d\n",mpi->flags&MP_IMGFLAG_DRAW_CALLBACK);
 313     if(!(mpi->flags&MP_IMGFLAG_DRAW_CALLBACK)) return; // shouldn't happen
 314     // they want slices!!! allocate the buffer.
 315     mpi->priv=vf->dmpi=vf_get_image(vf->next,vf->priv->fmt,
 316 //      mpi->type, mpi->flags & (~MP_IMGFLAG_DRAW_CALLBACK),
 317         MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE | MP_IMGFLAG_PREFER_ALIGNED_STRIDE,
 318         vf->priv->w, vf->priv->h);
 319 }
 320
 321 static void scale(struct SwsContext *sws1, struct SwsContext *sws2, uint8_t *src[MP_MAX_PLANES], int src_stride[MP_MAX_PLANES],
 322                   int y, int h,  uint8_t *dst[MP_MAX_PLANES], int dst_stride[MP_MAX_PLANES], int interlaced){
 323     uint8_t *src2[MP_MAX_PLANES]={src[0], src[1], src[2]};
 324 #ifdef WORDS_BIGENDIAN
 325     uint32_t pal2[256];
 326     if (src[1] && !src[2]){
 327         int i;
 328         for(i=0; i<256; i++)
 329             pal2[i]= bswap_32(((uint32_t*)src[1])[i]);
 330         src2[1]= pal2;
 331     }
 332 #endif
 333
 334     if(interlaced){
 335         int i;
 336         uint8_t *dst2[MP_MAX_PLANES]={dst[0], dst[1], dst[2]};
 337         int src_stride2[MP_MAX_PLANES]={2*src_stride[0], 2*src_stride[1], 2*src_stride[2]};
 338         int dst_stride2[MP_MAX_PLANES]={2*dst_stride[0], 2*dst_stride[1], 2*dst_stride[2]};
 339
 340         sws_scale_ordered(sws1, src2, src_stride2, y>>1, h>>1, dst2, dst_stride2);
 341         for(i=0; i<3; i++){
 342             src2[i] += src_stride[i];
 343             dst2[i] += dst_stride[i];
 344         }
 345         sws_scale_ordered(sws2, src2, src_stride2, y>>1, h>>1, dst2, dst_stride2);
 346     }else{
 347         sws_scale_ordered(sws1, src2, src_stride, y, h, dst, dst_stride);
 348     }
 349 }
 350
 351 static void draw_slice(struct vf_instance* vf,
 352         unsigned char** src, int* stride, int w,int h, int x, int y){
 353     mp_image_t *dmpi=vf->dmpi;
 354     if(!dmpi){
 355         mp_msg(MSGT_VFILTER,MSGL_FATAL,"vf_scale: draw_slice() called with dmpi=NULL (no get_image?)\n");
 356         return;
 357     }
 358 //    printf("vf_scale::draw_slice() y=%d h=%d\n",y,h);
 359     scale(vf->priv->ctx, vf->priv->ctx2, src, stride, y, h, dmpi->planes, dmpi->stride, vf->priv->interlaced);
 360 }
 361
 362 static int put_image(struct vf_instance* vf, mp_image_t *mpi, double pts){
 363     mp_image_t *dmpi=mpi->priv;
 364
 365 //    printf("vf_scale::put_image(): processing whole frame! dmpi=%p flag=%d\n",
 366 //      dmpi, (mpi->flags&MP_IMGFLAG_DRAW_CALLBACK));
 367
 368   if(!(mpi->flags&MP_IMGFLAG_DRAW_CALLBACK && dmpi)){
 369
 370     // hope we'll get DR buffer:
 371     dmpi=vf_get_image(vf->next,vf->priv->fmt,
 372         MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE | MP_IMGFLAG_PREFER_ALIGNED_STRIDE,
 373         vf->priv->w, vf->priv->h);
 374
 375       scale(vf->priv->ctx, vf->priv->ctx, mpi->planes,mpi->stride,0,mpi->h,dmpi->planes,dmpi->stride, vf->priv->interlaced);
 376   }
 377
 378     if(vf->priv->w==mpi->w && vf->priv->h==mpi->h){
 379         // just conversion, no scaling -> keep postprocessing data
 380         // this way we can apply pp filter to non-yv12 source using scaler
 381         vf_clone_mpi_attributes(dmpi, mpi);
 382     }
 383
 384     if(vf->priv->palette) dmpi->planes[1]=vf->priv->palette; // export palette!
 385
 386     return vf_next_put_image(vf,dmpi, pts);
 387 }
 388
 389 static int control(struct vf_instance* vf, int request, void* data){
 390     int *table;
 391     int *inv_table;
 392     int r;
 393     int brightness, contrast, saturation, srcRange, dstRange;
 394     vf_equalizer_t *eq;
 395
 396   if(vf->priv->ctx)
 397     switch(request){
 398     case VFCTRL_GET_EQUALIZER:
 399         r= sws_getColorspaceDetails(vf->priv->ctx, &inv_table, &srcRange, &table, &dstRange, &brightness, &contrast, &saturation);
 400         if(r<0) break;
 401
 402         eq = data;
 403         if (!strcmp(eq->item,"brightness")) {
 404                 eq->value =  ((brightness*100) + (1<<15))>>16;
 405         }
 406         else if (!strcmp(eq->item,"contrast")) {
 407                 eq->value = (((contrast  *100) + (1<<15))>>16) - 100;
 408         }
 409         else if (!strcmp(eq->item,"saturation")) {
 410                 eq->value = (((saturation*100) + (1<<15))>>16) - 100;
 411         }
 412         else
 413                 break;
 414         return CONTROL_TRUE;
 415     case VFCTRL_SET_EQUALIZER:
 416         r= sws_getColorspaceDetails(vf->priv->ctx, &inv_table, &srcRange, &table, &dstRange, &brightness, &contrast, &saturation);
 417         if(r<0) break;
 418 //printf("set %f %f %f\n", brightness/(float)(1<<16), contrast/(float)(1<<16), saturation/(float)(1<<16));
 419         eq = data;
 420
 421         if (!strcmp(eq->item,"brightness")) {
 422                 brightness = (( eq->value     <<16) + 50)/100;
 423         }
 424         else if (!strcmp(eq->item,"contrast")) {
 425                 contrast   = (((eq->value+100)<<16) + 50)/100;
 426         }
 427         else if (!strcmp(eq->item,"saturation")) {
 428                 saturation = (((eq->value+100)<<16) + 50)/100;
 429         }
 430         else
 431                 break;
 432
 433         r= sws_setColorspaceDetails(vf->priv->ctx, inv_table, srcRange, table, dstRange, brightness, contrast, saturation);
 434         if(r<0) break;
 435         if(vf->priv->ctx2){
 436             r= sws_setColorspaceDetails(vf->priv->ctx2, inv_table, srcRange, table, dstRange, brightness, contrast, saturation);
 437             if(r<0) break;
 438         }
 439
 440         return CONTROL_TRUE;
 441     default:
 442         break;
 443     }
 444
 445     return vf_next_control(vf,request,data);
 446 }
 447
 448 //===========================================================================//
 449
 450 //  supported Input formats: YV12, I420, IYUV, YUY2, UYVY, BGR32, BGR24, BGR16, BGR15, RGB32, RGB24, Y8, Y800
 451
 452 static int query_format(struct vf_instance* vf, unsigned int fmt){
 453     switch(fmt){
 454     case IMGFMT_YV12:
 455     case IMGFMT_I420:
 456     case IMGFMT_IYUV:
 457     case IMGFMT_UYVY:
 458     case IMGFMT_YUY2:
 459     case IMGFMT_BGR32:
 460     case IMGFMT_BGR24:
 461     case IMGFMT_BGR16:
 462     case IMGFMT_BGR15:
 463     case IMGFMT_RGB32:
 464     case IMGFMT_RGB24:
 465     case IMGFMT_Y800:
 466     case IMGFMT_Y8:
 467     case IMGFMT_YVU9:
 468     case IMGFMT_IF09:
 469     case IMGFMT_444P:
 470     case IMGFMT_422P:
 471     case IMGFMT_411P:
 472     case IMGFMT_BGR8:
 473     case IMGFMT_RGB8:
 474     case IMGFMT_BG4B:
 475     case IMGFMT_RG4B:
 476     {
 477         unsigned int best=find_best_out(vf);
 478         int flags;
 479         if(!best) return 0;      // no matching out-fmt
 480         flags=vf_next_query_format(vf,best);
 481         if(!(flags&(VFCAP_CSP_SUPPORTED|VFCAP_CSP_SUPPORTED_BY_HW))) return 0; // huh?
 482         if(fmt!=best) flags&=~VFCAP_CSP_SUPPORTED_BY_HW;
 483         // do not allow scaling, if we are before the PP fliter!
 484         if(!(flags&VFCAP_POSTPROC)) flags|=VFCAP_SWSCALE;
 485         return flags;
 486       }
 487     }
 488     return 0;   // nomatching in-fmt
 489 }
 490
 491 static void uninit(struct vf_instance *vf){
 492     if(vf->priv->ctx) sws_freeContext(vf->priv->ctx);
 493     if(vf->priv->ctx2) sws_freeContext(vf->priv->ctx2);
 494     if(vf->priv->palette) free(vf->priv->palette);
 495     free(vf->priv);
 496 }
 497
 498 static int open(vf_instance_t *vf, char* args){
 499     vf->config=config;
 500     vf->start_slice=start_slice;
 501     vf->draw_slice=draw_slice;
 502     vf->put_image=put_image;
 503     vf->query_format=query_format;
 504     vf->control= control;
 505     vf->uninit=uninit;
 506     if(!vf->priv) {
 507     vf->priv=malloc(sizeof(struct vf_priv_s));
 508     // TODO: parse args ->
 509     vf->priv->ctx=NULL;
 510     vf->priv->ctx2=NULL;
 511     vf->priv->w=
 512     vf->priv->h=-1;
 513     vf->priv->v_chr_drop=0;
 514     vf->priv->accurate_rnd=0;
 515     vf->priv->param[0]=
 516     vf->priv->param[1]=SWS_PARAM_DEFAULT;
 517     vf->priv->palette=NULL;
 518     } // if(!vf->priv)
 519     if(args) sscanf(args, "%d:%d:%d:%lf:%lf",
 520     &vf->priv->w,
 521     &vf->priv->h,
 522     &vf->priv->v_chr_drop,
 523     &vf->priv->param[0],
 524     &vf->priv->param[1]);
 525     mp_msg(MSGT_VFILTER,MSGL_V,"SwScale params: %d x %d (-1=no scaling)\n",
 526     vf->priv->w,
 527     vf->priv->h);
 528
 529     return 1;
 530 }
 531
 532 //global sws_flags from the command line
 533 int sws_flags=2;
 534
 535 //global srcFilter
 536 static SwsFilter *src_filter= NULL;
 537
 538 float sws_lum_gblur= 0.0;
 539 float sws_chr_gblur= 0.0;
 540 int sws_chr_vshift= 0;
 541 int sws_chr_hshift= 0;
 542 float sws_chr_sharpen= 0.0;
 543 float sws_lum_sharpen= 0.0;
 544
 545 int get_sws_cpuflags(void){
 546     return
 547           (gCpuCaps.hasMMX   ? SWS_CPU_CAPS_MMX   : 0)
 548         | (gCpuCaps.hasMMX2  ? SWS_CPU_CAPS_MMX2  : 0)
 549         | (gCpuCaps.has3DNow ? SWS_CPU_CAPS_3DNOW : 0)
 550         | (gCpuCaps.hasAltiVec ? SWS_CPU_CAPS_ALTIVEC : 0);
 551 }
 552
 553 void sws_getFlagsAndFilterFromCmdLine(int *flags, SwsFilter **srcFilterParam, SwsFilter **dstFilterParam)
 554 {
 555         static int firstTime=1;
 556         *flags=0;
 557
 558 #if ARCH_X86
 559         if(gCpuCaps.hasMMX)
 560                 __asm__ volatile("emms\n\t"::: "memory"); //FIXME this should not be required but it IS (even for non-MMX versions)
 561 #endif
 562         if(firstTime)
 563         {
 564                 firstTime=0;
 565                 *flags= SWS_PRINT_INFO;
 566         }
 567         else if( mp_msg_test(MSGT_VFILTER,MSGL_DBG2) ) *flags= SWS_PRINT_INFO;
 568
 569         if(src_filter) sws_freeFilter(src_filter);
 570
 571         src_filter= sws_getDefaultFilter(
 572                 sws_lum_gblur, sws_chr_gblur,
 573                 sws_lum_sharpen, sws_chr_sharpen,
 574                 sws_chr_hshift, sws_chr_vshift, verbose>1);
 575
 576         switch(sws_flags)
 577         {
 578                 case 0: *flags|= SWS_FAST_BILINEAR; break;
 579                 case 1: *flags|= SWS_BILINEAR; break;
 580                 case 2: *flags|= SWS_BICUBIC; break;
 581                 case 3: *flags|= SWS_X; break;
 582                 case 4: *flags|= SWS_POINT; break;
 583                 case 5: *flags|= SWS_AREA; break;
 584                 case 6: *flags|= SWS_BICUBLIN; break;
 585                 case 7: *flags|= SWS_GAUSS; break;
 586                 case 8: *flags|= SWS_SINC; break;
 587                 case 9: *flags|= SWS_LANCZOS; break;
 588                 case 10:*flags|= SWS_SPLINE; break;
 589                 default:*flags|= SWS_BILINEAR; break;
 590         }
 591
 592         *srcFilterParam= src_filter;
 593         *dstFilterParam= NULL;
 594 }
 595
 596 // will use sws_flags & src_filter (from cmd line)
 597 struct SwsContext *sws_getContextFromCmdLine(int srcW, int srcH, int srcFormat, int dstW, int dstH, int dstFormat)
 598 {
 599         int flags;
 600         SwsFilter *dstFilterParam, *srcFilterParam;
 601         enum PixelFormat dfmt, sfmt;
 602
 603         dfmt = imgfmt2pixfmt(dstFormat);
 604         sfmt = imgfmt2pixfmt(srcFormat);
 605         if (srcFormat == IMGFMT_RGB8 || srcFormat == IMGFMT_BGR8) sfmt = PIX_FMT_PAL8;
 606         sws_getFlagsAndFilterFromCmdLine(&flags, &srcFilterParam, &dstFilterParam);
 607
 608         return sws_getContext(srcW, srcH, sfmt, dstW, dstH, dfmt, flags | get_sws_cpuflags(), srcFilterParam, dstFilterParam, NULL);
 609 }
 610
 611 /// An example of presets usage
 612 static const struct size_preset {
 613   char* name;
 614   int w, h;
 615 } vf_size_presets_defs[] = {
 616   // TODO add more 'standard' resolutions
 617   { "qntsc", 352, 240 },
 618   { "qpal", 352, 288 },
 619   { "ntsc", 720, 480 },
 620   { "pal", 720, 576 },
 621   { "sntsc", 640, 480 },
 622   { "spal", 768, 576 },
 623   { NULL, 0, 0}
 624 };
 625
 626 #define ST_OFF(f) M_ST_OFF(struct size_preset,f)
 627 static const m_option_t vf_size_preset_fields[] = {
 628   {"w", ST_OFF(w), CONF_TYPE_INT, M_OPT_MIN,1 ,0, NULL},
 629   {"h", ST_OFF(h), CONF_TYPE_INT, M_OPT_MIN,1 ,0, NULL},
 630   { NULL, NULL, 0, 0, 0, 0,  NULL }
 631 };
 632
 633 static const m_struct_t vf_size_preset = {
 634   "scale_size_preset",
 635   sizeof(struct size_preset),
 636   NULL,
 637   vf_size_preset_fields
 638 };
 639
 640 static const m_struct_t vf_opts;
 641 static const m_obj_presets_t size_preset = {
 642   &vf_size_preset, // Input struct desc
 643   &vf_opts, // Output struct desc
 644   vf_size_presets_defs, // The list of presets
 645   ST_OFF(name) // At wich offset is the name field in the preset struct
 646 };
 647
 648 /// Now the options
 649 #undef ST_OFF
 650 #define ST_OFF(f) M_ST_OFF(struct vf_priv_s,f)
 651 static const m_option_t vf_opts_fields[] = {
 652   {"w", ST_OFF(w), CONF_TYPE_INT, M_OPT_MIN,-11,0, NULL},
 653   {"h", ST_OFF(h), CONF_TYPE_INT, M_OPT_MIN,-11,0, NULL},
 654   {"interlaced", ST_OFF(interlaced), CONF_TYPE_INT, M_OPT_RANGE, 0, 1, NULL},
 655   {"chr-drop", ST_OFF(v_chr_drop), CONF_TYPE_INT, M_OPT_RANGE, 0, 3, NULL},
 656   {"param" , ST_OFF(param[0]), CONF_TYPE_DOUBLE, M_OPT_RANGE, 0.0, 100.0, NULL},
 657   {"param2", ST_OFF(param[1]), CONF_TYPE_DOUBLE, M_OPT_RANGE, 0.0, 100.0, NULL},
 658   // Note that here the 2 field is NULL (ie 0)
 659   // As we want this option to act on the option struct itself
 660   {"presize", 0, CONF_TYPE_OBJ_PRESETS, 0, 0, 0, &size_preset},
 661   {"noup", ST_OFF(noup), CONF_TYPE_INT, M_OPT_RANGE, 0, 2, NULL},
 662   {"arnd", ST_OFF(accurate_rnd), CONF_TYPE_FLAG, 0, 0, 1, NULL},
 663   { NULL, NULL, 0, 0, 0, 0,  NULL }
 664 };
 665
 666 static const m_struct_t vf_opts = {
 667   "scale",
 668   sizeof(struct vf_priv_s),
 669   &vf_priv_dflt,
 670   vf_opts_fields
 671 };
 672
 673 const vf_info_t vf_info_scale = {
 674     "software scaling",
 675     "scale",
 676     "A'rpi",
 677     "",
 678     open,
 679     &vf_opts
 680 };
 681
 682 //===========================================================================//