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_444P16_LE,
  53     IMGFMT_444P16_BE,
  54     IMGFMT_422P,
  55     IMGFMT_422P16_LE,
  56     IMGFMT_422P16_BE,
  57     IMGFMT_YV12,
  58     IMGFMT_I420,
  59     IMGFMT_420P16_LE,
  60     IMGFMT_420P16_BE,
  61     IMGFMT_420A,
  62     IMGFMT_IYUV,
  63     IMGFMT_YVU9,
  64     IMGFMT_IF09,
  65     IMGFMT_411P,
  66     IMGFMT_NV12,
  67     IMGFMT_NV21,
  68     IMGFMT_YUY2,
  69     IMGFMT_UYVY,
  70     IMGFMT_440P,
  71 // RGB and grayscale (Y8 and Y800):
  72     IMGFMT_BGR32,
  73     IMGFMT_RGB32,
  74     IMGFMT_BGR24,
  75     IMGFMT_RGB24,
  76     IMGFMT_RGB48LE,
  77     IMGFMT_RGB48BE,
  78     IMGFMT_BGR16,
  79     IMGFMT_RGB16,
  80     IMGFMT_BGR15,
  81     IMGFMT_RGB15,
  82     IMGFMT_Y800,
  83     IMGFMT_Y8,
  84     IMGFMT_BGR8,
  85     IMGFMT_RGB8,
  86     IMGFMT_BGR4,
  87     IMGFMT_RGB4,
  88     IMGFMT_BG4B,
  89     IMGFMT_RG4B,
  90     IMGFMT_BGR1,
  91     IMGFMT_RGB1,
  92     0
  93 };
  94
  95 static unsigned int find_best_out(vf_instance_t *vf){
  96     unsigned int best=0;
  97     int i;
  98
  99     // find the best outfmt:
 100     for(i=0; i<sizeof(outfmt_list)/sizeof(int)-1; i++){
 101         const int format= outfmt_list[i];
 102         int ret= vf->priv->query_format_cache[i]-1;
 103         if(ret == -1){
 104             ret= vf_next_query_format(vf, outfmt_list[i]);
 105             vf->priv->query_format_cache[i]= ret+1;
 106         }
 107
 108         mp_msg(MSGT_VFILTER,MSGL_DBG2,"scale: query(%s) -> %d\n",vo_format_name(format),ret&3);
 109         if(ret&VFCAP_CSP_SUPPORTED_BY_HW){
 110             best=format; // no conversion -> bingo!
 111             break;
 112         }
 113         if(ret&VFCAP_CSP_SUPPORTED && !best)
 114             best=format; // best with conversion
 115     }
 116     return best;
 117 }
 118
 119 static int config(struct vf_instance* vf,
 120         int width, int height, int d_width, int d_height,
 121         unsigned int flags, unsigned int outfmt){
 122     struct MPOpts *opts = vf->opts;
 123     unsigned int best=find_best_out(vf);
 124     int vo_flags;
 125     int int_sws_flags=0;
 126     int round_w=0, round_h=0;
 127     int i;
 128     SwsFilter *srcFilter, *dstFilter;
 129     enum PixelFormat dfmt, sfmt;
 130
 131     if(!best){
 132         mp_msg(MSGT_VFILTER,MSGL_WARN,"SwScale: no supported outfmt found :(\n");
 133         return 0;
 134     }
 135     sfmt = imgfmt2pixfmt(outfmt);
 136     if (outfmt == IMGFMT_RGB8 || outfmt == IMGFMT_BGR8) sfmt = PIX_FMT_PAL8;
 137     dfmt = imgfmt2pixfmt(best);
 138
 139     vo_flags=vf->next->query_format(vf->next,best);
 140
 141     // scaling to dwidth*d_height, if all these TRUE:
 142     // - option -zoom
 143     // - no other sw/hw up/down scaling avail.
 144     // - we're after postproc
 145     // - user didn't set w:h
 146     if(!(vo_flags&VFCAP_POSTPROC) && (flags&4) &&
 147             vf->priv->w<0 && vf->priv->h<0){    // -zoom
 148         int x=(vo_flags&VFCAP_SWSCALE) ? 0 : 1;
 149         if(d_width<width || d_height<height){
 150             // downscale!
 151             if(vo_flags&VFCAP_HWSCALE_DOWN) x=0;
 152         } else {
 153             // upscale:
 154             if(vo_flags&VFCAP_HWSCALE_UP) x=0;
 155         }
 156         if(x){
 157             // user wants sw scaling! (-zoom)
 158             vf->priv->w=d_width;
 159             vf->priv->h=d_height;
 160         }
 161     }
 162
 163     if(vf->priv->noup){
 164         if((vf->priv->w > width) + (vf->priv->h > height) >= vf->priv->noup){
 165             vf->priv->w= width;
 166             vf->priv->h= height;
 167         }
 168     }
 169
 170     if (vf->priv->w <= -8) {
 171       vf->priv->w += 8;
 172       round_w = 1;
 173     }
 174     if (vf->priv->h <= -8) {
 175       vf->priv->h += 8;
 176       round_h = 1;
 177     }
 178
 179     if (vf->priv->w < -3 || vf->priv->h < -3 ||
 180          (vf->priv->w < -1 && vf->priv->h < -1)) {
 181       // TODO: establish a direct connection to the user's brain
 182       // and find out what the heck he thinks MPlayer should do
 183       // with this nonsense.
 184       mp_msg(MSGT_VFILTER, MSGL_ERR, "SwScale: EUSERBROKEN Check your parameters, they make no sense!\n");
 185       return 0;
 186     }
 187
 188     if (vf->priv->w == -1)
 189       vf->priv->w = width;
 190     if (vf->priv->w == 0)
 191       vf->priv->w = d_width;
 192
 193     if (vf->priv->h == -1)
 194       vf->priv->h = height;
 195     if (vf->priv->h == 0)
 196       vf->priv->h = d_height;
 197
 198     if (vf->priv->w == -3)
 199       vf->priv->w = vf->priv->h * width / height;
 200     if (vf->priv->w == -2)
 201       vf->priv->w = vf->priv->h * d_width / d_height;
 202
 203     if (vf->priv->h == -3)
 204       vf->priv->h = vf->priv->w * height / width;
 205     if (vf->priv->h == -2)
 206       vf->priv->h = vf->priv->w * d_height / d_width;
 207
 208     if (round_w)
 209       vf->priv->w = ((vf->priv->w + 8) / 16) * 16;
 210     if (round_h)
 211       vf->priv->h = ((vf->priv->h + 8) / 16) * 16;
 212
 213     // calculate the missing parameters:
 214     switch(best) {
 215     case IMGFMT_YV12:           /* YV12 needs w & h rounded to 2 */
 216     case IMGFMT_I420:
 217     case IMGFMT_IYUV:
 218     case IMGFMT_NV12:
 219     case IMGFMT_NV21:
 220       vf->priv->h = (vf->priv->h + 1) & ~1;
 221     case IMGFMT_YUY2:           /* YUY2 needs w rounded to 2 */
 222     case IMGFMT_UYVY:
 223       vf->priv->w = (vf->priv->w + 1) & ~1;
 224     }
 225
 226     mp_msg(MSGT_VFILTER,MSGL_DBG2,"SwScale: scaling %dx%d %s to %dx%d %s  \n",
 227         width,height,vo_format_name(outfmt),
 228         vf->priv->w,vf->priv->h,vo_format_name(best));
 229
 230     // free old ctx:
 231     if(vf->priv->ctx) sws_freeContext(vf->priv->ctx);
 232     if(vf->priv->ctx2)sws_freeContext(vf->priv->ctx2);
 233
 234     // new swscaler:
 235     sws_getFlagsAndFilterFromCmdLine(&int_sws_flags, &srcFilter, &dstFilter);
 236     int_sws_flags|= vf->priv->v_chr_drop << SWS_SRC_V_CHR_DROP_SHIFT;
 237     int_sws_flags|= vf->priv->accurate_rnd * SWS_ACCURATE_RND;
 238     vf->priv->ctx=sws_getContext(width, height >> vf->priv->interlaced,
 239             sfmt,
 240                   vf->priv->w, vf->priv->h >> vf->priv->interlaced,
 241             dfmt,
 242             int_sws_flags | get_sws_cpuflags(), srcFilter, dstFilter, vf->priv->param);
 243     if(vf->priv->interlaced){
 244         vf->priv->ctx2=sws_getContext(width, height >> 1,
 245             sfmt,
 246                   vf->priv->w, vf->priv->h >> 1,
 247             dfmt,
 248             int_sws_flags | get_sws_cpuflags(), srcFilter, dstFilter, vf->priv->param);
 249     }
 250     if(!vf->priv->ctx){
 251         // error...
 252         mp_msg(MSGT_VFILTER,MSGL_WARN,"Couldn't init SwScaler for this setup\n");
 253         return 0;
 254     }
 255     vf->priv->fmt=best;
 256
 257     if(vf->priv->palette){
 258         free(vf->priv->palette);
 259         vf->priv->palette=NULL;
 260     }
 261     switch(best){
 262     case IMGFMT_RGB8: {
 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>>6)*21;
 267             vf->priv->palette[4*i+1]=4*((i>>3)&7)*9;
 268             vf->priv->palette[4*i+2]=4*((i&7)&7)*9;
 269             vf->priv->palette[4*i+3]=0;
 270         }
 271         break; }
 272     case IMGFMT_BGR8: {
 273       /* set 332 palette for 8 bpp */
 274         vf->priv->palette=malloc(4*256);
 275         for(i=0; i<256; i++){
 276             vf->priv->palette[4*i+0]=4*(i&3)*21;
 277             vf->priv->palette[4*i+1]=4*((i>>2)&7)*9;
 278             vf->priv->palette[4*i+2]=4*((i>>5)&7)*9;
 279             vf->priv->palette[4*i+3]=0;
 280         }
 281         break; }
 282     case IMGFMT_BGR4:
 283     case IMGFMT_BG4B: {
 284         vf->priv->palette=malloc(4*16);
 285         for(i=0; i<16; i++){
 286             vf->priv->palette[4*i+0]=4*(i&1)*63;
 287             vf->priv->palette[4*i+1]=4*((i>>1)&3)*21;
 288             vf->priv->palette[4*i+2]=4*((i>>3)&1)*63;
 289             vf->priv->palette[4*i+3]=0;
 290         }
 291         break; }
 292     case IMGFMT_RGB4:
 293     case IMGFMT_RG4B: {
 294         vf->priv->palette=malloc(4*16);
 295         for(i=0; i<16; i++){
 296             vf->priv->palette[4*i+0]=4*(i>>3)*63;
 297             vf->priv->palette[4*i+1]=4*((i>>1)&3)*21;
 298             vf->priv->palette[4*i+2]=4*((i&1)&1)*63;
 299             vf->priv->palette[4*i+3]=0;
 300         }
 301         break; }
 302     }
 303
 304     if (!opts->screen_size_x && !opts->screen_size_y
 305         && !(opts->screen_size_xy >= 0.001)) {
 306         // Compute new d_width and d_height, preserving aspect
 307         // while ensuring that both are >= output size in pixels.
 308         if (vf->priv->h * d_width > vf->priv->w * d_height) {
 309                 d_width = vf->priv->h * d_width / d_height;
 310                 d_height = vf->priv->h;
 311         } else {
 312                 d_height = vf->priv->w * d_height / d_width;
 313                 d_width = vf->priv->w;
 314         }
 315         //d_width=d_width*vf->priv->w/width;
 316         //d_height=d_height*vf->priv->h/height;
 317     }
 318     return vf_next_config(vf,vf->priv->w,vf->priv->h,d_width,d_height,flags,best);
 319 }
 320
 321 static void start_slice(struct vf_instance* vf, mp_image_t *mpi){
 322 //    printf("start_slice called! flag=%d\n",mpi->flags&MP_IMGFLAG_DRAW_CALLBACK);
 323     if(!(mpi->flags&MP_IMGFLAG_DRAW_CALLBACK)) return; // shouldn't happen
 324     // they want slices!!! allocate the buffer.
 325     mpi->priv=vf->dmpi=vf_get_image(vf->next,vf->priv->fmt,
 326 //      mpi->type, mpi->flags & (~MP_IMGFLAG_DRAW_CALLBACK),
 327         MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE | MP_IMGFLAG_PREFER_ALIGNED_STRIDE,
 328         vf->priv->w, vf->priv->h);
 329 }
 330
 331 static void scale(struct SwsContext *sws1, struct SwsContext *sws2, uint8_t *src[MP_MAX_PLANES], int src_stride[MP_MAX_PLANES],
 332                   int y, int h,  uint8_t *dst[MP_MAX_PLANES], int dst_stride[MP_MAX_PLANES], int interlaced){
 333     uint8_t *src2[MP_MAX_PLANES]={src[0], src[1], src[2], src[3]};
 334 #if HAVE_BIGENDIAN
 335     uint32_t pal2[256];
 336     if (src[1] && !src[2]){
 337         int i;
 338         for(i=0; i<256; i++)
 339             pal2[i]= bswap_32(((uint32_t*)src[1])[i]);
 340         src2[1]= pal2;
 341     }
 342 #endif
 343
 344     if(interlaced){
 345         int i;
 346         uint8_t *dst2[MP_MAX_PLANES]={dst[0], dst[1], dst[2], dst[3]};
 347         int src_stride2[MP_MAX_PLANES]={2*src_stride[0], 2*src_stride[1], 2*src_stride[2], 2*src_stride[3]};
 348         int dst_stride2[MP_MAX_PLANES]={2*dst_stride[0], 2*dst_stride[1], 2*dst_stride[2], 2*dst_stride[3]};
 349
 350         sws_scale(sws1, src2, src_stride2, y>>1, h>>1, dst2, dst_stride2);
 351         for(i=0; i<MP_MAX_PLANES; i++){
 352             src2[i] += src_stride[i];
 353             dst2[i] += dst_stride[i];
 354         }
 355         sws_scale(sws2, src2, src_stride2, y>>1, h>>1, dst2, dst_stride2);
 356     }else{
 357         sws_scale(sws1, src2, src_stride, y, h, dst, dst_stride);
 358     }
 359 }
 360
 361 static void draw_slice(struct vf_instance* vf,
 362         unsigned char** src, int* stride, int w,int h, int x, int y){
 363     mp_image_t *dmpi=vf->dmpi;
 364     if(!dmpi){
 365         mp_msg(MSGT_VFILTER,MSGL_FATAL,"vf_scale: draw_slice() called with dmpi=NULL (no get_image?)\n");
 366         return;
 367     }
 368 //    printf("vf_scale::draw_slice() y=%d h=%d\n",y,h);
 369     scale(vf->priv->ctx, vf->priv->ctx2, src, stride, y, h, dmpi->planes, dmpi->stride, vf->priv->interlaced);
 370 }
 371
 372 static int put_image(struct vf_instance* vf, mp_image_t *mpi, double pts){
 373     mp_image_t *dmpi=mpi->priv;
 374
 375 //    printf("vf_scale::put_image(): processing whole frame! dmpi=%p flag=%d\n",
 376 //      dmpi, (mpi->flags&MP_IMGFLAG_DRAW_CALLBACK));
 377
 378   if(!(mpi->flags&MP_IMGFLAG_DRAW_CALLBACK && dmpi)){
 379
 380     // hope we'll get DR buffer:
 381     dmpi=vf_get_image(vf->next,vf->priv->fmt,
 382         MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE | MP_IMGFLAG_PREFER_ALIGNED_STRIDE,
 383         vf->priv->w, vf->priv->h);
 384
 385       scale(vf->priv->ctx, vf->priv->ctx, mpi->planes,mpi->stride,0,mpi->h,dmpi->planes,dmpi->stride, vf->priv->interlaced);
 386   }
 387
 388     if(vf->priv->w==mpi->w && vf->priv->h==mpi->h){
 389         // just conversion, no scaling -> keep postprocessing data
 390         // this way we can apply pp filter to non-yv12 source using scaler
 391         vf_clone_mpi_attributes(dmpi, mpi);
 392     }
 393
 394     if(vf->priv->palette) dmpi->planes[1]=vf->priv->palette; // export palette!
 395
 396     return vf_next_put_image(vf,dmpi, pts);
 397 }
 398
 399 static int control(struct vf_instance* vf, int request, void* data){
 400     int *table;
 401     int *inv_table;
 402     int r;
 403     int brightness, contrast, saturation, srcRange, dstRange;
 404     vf_equalizer_t *eq;
 405
 406   if(vf->priv->ctx)
 407     switch(request){
 408     case VFCTRL_GET_EQUALIZER:
 409         r= sws_getColorspaceDetails(vf->priv->ctx, &inv_table, &srcRange, &table, &dstRange, &brightness, &contrast, &saturation);
 410         if(r<0) break;
 411
 412         eq = data;
 413         if (!strcmp(eq->item,"brightness")) {
 414                 eq->value =  ((brightness*100) + (1<<15))>>16;
 415         }
 416         else if (!strcmp(eq->item,"contrast")) {
 417                 eq->value = (((contrast  *100) + (1<<15))>>16) - 100;
 418         }
 419         else if (!strcmp(eq->item,"saturation")) {
 420                 eq->value = (((saturation*100) + (1<<15))>>16) - 100;
 421         }
 422         else
 423                 break;
 424         return CONTROL_TRUE;
 425     case VFCTRL_SET_EQUALIZER:
 426         r= sws_getColorspaceDetails(vf->priv->ctx, &inv_table, &srcRange, &table, &dstRange, &brightness, &contrast, &saturation);
 427         if(r<0) break;
 428 //printf("set %f %f %f\n", brightness/(float)(1<<16), contrast/(float)(1<<16), saturation/(float)(1<<16));
 429         eq = data;
 430
 431         if (!strcmp(eq->item,"brightness")) {
 432                 brightness = (( eq->value     <<16) + 50)/100;
 433         }
 434         else if (!strcmp(eq->item,"contrast")) {
 435                 contrast   = (((eq->value+100)<<16) + 50)/100;
 436         }
 437         else if (!strcmp(eq->item,"saturation")) {
 438                 saturation = (((eq->value+100)<<16) + 50)/100;
 439         }
 440         else
 441                 break;
 442
 443         r= sws_setColorspaceDetails(vf->priv->ctx, inv_table, srcRange, table, dstRange, brightness, contrast, saturation);
 444         if(r<0) break;
 445         if(vf->priv->ctx2){
 446             r= sws_setColorspaceDetails(vf->priv->ctx2, inv_table, srcRange, table, dstRange, brightness, contrast, saturation);
 447             if(r<0) break;
 448         }
 449
 450         return CONTROL_TRUE;
 451     default:
 452         break;
 453     }
 454
 455     return vf_next_control(vf,request,data);
 456 }
 457
 458 //===========================================================================//
 459
 460 //  supported Input formats: YV12, I420, IYUV, YUY2, UYVY, BGR32, BGR24, BGR16, BGR15, RGB32, RGB24, Y8, Y800
 461
 462 static int query_format(struct vf_instance* vf, unsigned int fmt){
 463     switch(fmt){
 464     case IMGFMT_YV12:
 465     case IMGFMT_I420:
 466     case IMGFMT_IYUV:
 467     case IMGFMT_UYVY:
 468     case IMGFMT_YUY2:
 469     case IMGFMT_BGR32:
 470     case IMGFMT_BGR24:
 471     case IMGFMT_BGR16:
 472     case IMGFMT_BGR15:
 473     case IMGFMT_RGB32:
 474     case IMGFMT_RGB24:
 475     case IMGFMT_Y800:
 476     case IMGFMT_Y8:
 477     case IMGFMT_YVU9:
 478     case IMGFMT_IF09:
 479     case IMGFMT_444P:
 480     case IMGFMT_422P:
 481     case IMGFMT_411P:
 482     case IMGFMT_440P:
 483     case IMGFMT_420A:
 484     case IMGFMT_444P16_LE:
 485     case IMGFMT_444P16_BE:
 486     case IMGFMT_422P16_LE:
 487     case IMGFMT_422P16_BE:
 488     case IMGFMT_420P16_LE:
 489     case IMGFMT_420P16_BE:
 490     case IMGFMT_BGR8:
 491     case IMGFMT_RGB8:
 492     case IMGFMT_BG4B:
 493     case IMGFMT_RG4B:
 494     case IMGFMT_RGB48LE:
 495     case IMGFMT_RGB48BE:
 496     {
 497         unsigned int best=find_best_out(vf);
 498         int flags;
 499         if(!best) return 0;      // no matching out-fmt
 500         flags=vf_next_query_format(vf,best);
 501         if(!(flags&(VFCAP_CSP_SUPPORTED|VFCAP_CSP_SUPPORTED_BY_HW))) return 0; // huh?
 502         if(fmt!=best) flags&=~VFCAP_CSP_SUPPORTED_BY_HW;
 503         // do not allow scaling, if we are before the PP fliter!
 504         if(!(flags&VFCAP_POSTPROC)) flags|=VFCAP_SWSCALE;
 505         return flags;
 506       }
 507     }
 508     return 0;   // nomatching in-fmt
 509 }
 510
 511 static void uninit(struct vf_instance *vf){
 512     if(vf->priv->ctx) sws_freeContext(vf->priv->ctx);
 513     if(vf->priv->ctx2) sws_freeContext(vf->priv->ctx2);
 514     if(vf->priv->palette) free(vf->priv->palette);
 515     free(vf->priv);
 516 }
 517
 518 static int open(vf_instance_t *vf, char* args){
 519     vf->config=config;
 520     vf->start_slice=start_slice;
 521     vf->draw_slice=draw_slice;
 522     vf->put_image=put_image;
 523     vf->query_format=query_format;
 524     vf->control= control;
 525     vf->uninit=uninit;
 526     mp_msg(MSGT_VFILTER,MSGL_V,"SwScale params: %d x %d (-1=no scaling)\n",
 527     vf->priv->w,
 528     vf->priv->h);
 529
 530     return 1;
 531 }
 532
 533 //global sws_flags from the command line
 534 int sws_flags=2;
 535
 536 //global srcFilter
 537 static SwsFilter *src_filter= NULL;
 538
 539 float sws_lum_gblur= 0.0;
 540 float sws_chr_gblur= 0.0;
 541 int sws_chr_vshift= 0;
 542 int sws_chr_hshift= 0;
 543 float sws_chr_sharpen= 0.0;
 544 float sws_lum_sharpen= 0.0;
 545
 546 int get_sws_cpuflags(void){
 547     return
 548           (gCpuCaps.hasMMX   ? SWS_CPU_CAPS_MMX   : 0)
 549         | (gCpuCaps.hasMMX2  ? SWS_CPU_CAPS_MMX2  : 0)
 550         | (gCpuCaps.has3DNow ? SWS_CPU_CAPS_3DNOW : 0)
 551         | (gCpuCaps.hasAltiVec ? SWS_CPU_CAPS_ALTIVEC : 0);
 552 }
 553
 554 void sws_getFlagsAndFilterFromCmdLine(int *flags, SwsFilter **srcFilterParam, SwsFilter **dstFilterParam)
 555 {
 556         static int firstTime=1;
 557         *flags=0;
 558
 559 #if ARCH_X86
 560         if(gCpuCaps.hasMMX)
 561                 __asm__ volatile("emms\n\t"::: "memory"); //FIXME this should not be required but it IS (even for non-MMX versions)
 562 #endif
 563         if(firstTime)
 564         {
 565                 firstTime=0;
 566                 *flags= SWS_PRINT_INFO;
 567         }
 568         else if( mp_msg_test(MSGT_VFILTER,MSGL_DBG2) ) *flags= SWS_PRINT_INFO;
 569
 570         if(src_filter) sws_freeFilter(src_filter);
 571
 572         src_filter= sws_getDefaultFilter(
 573                 sws_lum_gblur, sws_chr_gblur,
 574                 sws_lum_sharpen, sws_chr_sharpen,
 575                 sws_chr_hshift, sws_chr_vshift, verbose>1);
 576
 577         switch(sws_flags)
 578         {
 579                 case 0: *flags|= SWS_FAST_BILINEAR; break;
 580                 case 1: *flags|= SWS_BILINEAR; break;
 581                 case 2: *flags|= SWS_BICUBIC; break;
 582                 case 3: *flags|= SWS_X; break;
 583                 case 4: *flags|= SWS_POINT; break;
 584                 case 5: *flags|= SWS_AREA; break;
 585                 case 6: *flags|= SWS_BICUBLIN; break;
 586                 case 7: *flags|= SWS_GAUSS; break;
 587                 case 8: *flags|= SWS_SINC; break;
 588                 case 9: *flags|= SWS_LANCZOS; break;
 589                 case 10:*flags|= SWS_SPLINE; break;
 590                 default:*flags|= SWS_BILINEAR; break;
 591         }
 592
 593         *srcFilterParam= src_filter;
 594         *dstFilterParam= NULL;
 595 }
 596
 597 // will use sws_flags & src_filter (from cmd line)
 598 struct SwsContext *sws_getContextFromCmdLine(int srcW, int srcH, int srcFormat, int dstW, int dstH, int dstFormat)
 599 {
 600         int flags;
 601         SwsFilter *dstFilterParam, *srcFilterParam;
 602         enum PixelFormat dfmt, sfmt;
 603
 604         dfmt = imgfmt2pixfmt(dstFormat);
 605         sfmt = imgfmt2pixfmt(srcFormat);
 606         if (srcFormat == IMGFMT_RGB8 || srcFormat == IMGFMT_BGR8) sfmt = PIX_FMT_PAL8;
 607         sws_getFlagsAndFilterFromCmdLine(&flags, &srcFilterParam, &dstFilterParam);
 608
 609         return sws_getContext(srcW, srcH, sfmt, dstW, dstH, dfmt, flags | get_sws_cpuflags(), srcFilterParam, dstFilterParam, NULL);
 610 }
 611
 612 /// An example of presets usage
 613 static const struct size_preset {
 614   char* name;
 615   int w, h;
 616 } vf_size_presets_defs[] = {
 617   // TODO add more 'standard' resolutions
 618   { "qntsc", 352, 240 },
 619   { "qpal", 352, 288 },
 620   { "ntsc", 720, 480 },
 621   { "pal", 720, 576 },
 622   { "sntsc", 640, 480 },
 623   { "spal", 768, 576 },
 624   { NULL, 0, 0}
 625 };
 626
 627 #define ST_OFF(f) M_ST_OFF(struct size_preset,f)
 628 static const m_option_t vf_size_preset_fields[] = {
 629   {"w", ST_OFF(w), CONF_TYPE_INT, M_OPT_MIN,1 ,0, NULL},
 630   {"h", ST_OFF(h), CONF_TYPE_INT, M_OPT_MIN,1 ,0, NULL},
 631   { NULL, NULL, 0, 0, 0, 0,  NULL }
 632 };
 633
 634 static const m_struct_t vf_size_preset = {
 635   "scale_size_preset",
 636   sizeof(struct size_preset),
 637   NULL,
 638   vf_size_preset_fields
 639 };
 640
 641 static const m_struct_t vf_opts;
 642 static const m_obj_presets_t size_preset = {
 643   &vf_size_preset, // Input struct desc
 644   &vf_opts, // Output struct desc
 645   vf_size_presets_defs, // The list of presets
 646   ST_OFF(name) // At wich offset is the name field in the preset struct
 647 };
 648
 649 /// Now the options
 650 #undef ST_OFF
 651 #define ST_OFF(f) M_ST_OFF(struct vf_priv_s,f)
 652 static const m_option_t vf_opts_fields[] = {
 653   {"w", ST_OFF(w), CONF_TYPE_INT, M_OPT_MIN,-11,0, NULL},
 654   {"h", ST_OFF(h), CONF_TYPE_INT, M_OPT_MIN,-11,0, NULL},
 655   {"interlaced", ST_OFF(interlaced), CONF_TYPE_INT, M_OPT_RANGE, 0, 1, NULL},
 656   {"chr-drop", ST_OFF(v_chr_drop), CONF_TYPE_INT, M_OPT_RANGE, 0, 3, NULL},
 657   {"param" , ST_OFF(param[0]), CONF_TYPE_DOUBLE, M_OPT_RANGE, 0.0, 100.0, NULL},
 658   {"param2", ST_OFF(param[1]), CONF_TYPE_DOUBLE, M_OPT_RANGE, 0.0, 100.0, NULL},
 659   // Note that here the 2 field is NULL (ie 0)
 660   // As we want this option to act on the option struct itself
 661   {"presize", 0, CONF_TYPE_OBJ_PRESETS, 0, 0, 0, &size_preset},
 662   {"noup", ST_OFF(noup), CONF_TYPE_INT, M_OPT_RANGE, 0, 2, NULL},
 663   {"arnd", ST_OFF(accurate_rnd), CONF_TYPE_FLAG, 0, 0, 1, NULL},
 664   { NULL, NULL, 0, 0, 0, 0,  NULL }
 665 };
 666
 667 static const m_struct_t vf_opts = {
 668   "scale",
 669   sizeof(struct vf_priv_s),
 670   &vf_priv_dflt,
 671   vf_opts_fields
 672 };
 673
 674 const vf_info_t vf_info_scale = {
 675     "software scaling",
 676     "scale",
 677     "A'rpi",
 678     "",
 679     open,
 680     &vf_opts
 681 };
 682
 683 //===========================================================================//