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