libmpcodecs/vf_scale.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 #include <inttypes.h>
  23
  24 #include "config.h"
  25 #include "mp_msg.h"
  26 #include "cpudetect.h"
  27
  28 #include "img_format.h"
  29 #include "mp_image.h"
  30 #include "vd.h"
  31 #include "vf.h"
  32 #include "fmt-conversion.h"
  33 #include "mpbswap.h"
  34
  35 #include "libswscale/swscale.h"
  36 #include "vf_scale.h"
  37
  38 #include "m_option.h"
  39 #include "m_struct.h"
  40
  41 static struct vf_priv_s {
  42     int w,h;
  43     int v_chr_drop;
  44     double param[2];
  45     unsigned int fmt;
  46     struct SwsContext *ctx;
  47     struct SwsContext *ctx2; //for interlaced slices only
  48     unsigned char* palette;
  49     int interlaced;
  50     int noup;
  51     int accurate_rnd;
  52 } const vf_priv_dflt = {
  53   -1,-1,
  54   0,
  55   {SWS_PARAM_DEFAULT, SWS_PARAM_DEFAULT},
  56   0,
  57   NULL,
  58   NULL,
  59   NULL
  60 };
  61
  62 //===========================================================================//
  63
  64 void sws_getFlagsAndFilterFromCmdLine(int *flags, SwsFilter **srcFilterParam, SwsFilter **dstFilterParam);
  65
  66 static const unsigned int outfmt_list[]={
  67 // YUV:
  68     IMGFMT_444P,
  69     IMGFMT_444P16_LE,
  70     IMGFMT_444P16_BE,
  71     IMGFMT_422P,
  72     IMGFMT_422P16_LE,
  73     IMGFMT_422P16_BE,
  74     IMGFMT_YV12,
  75     IMGFMT_I420,
  76     IMGFMT_420P16_LE,
  77     IMGFMT_420P16_BE,
  78     IMGFMT_420A,
  79     IMGFMT_IYUV,
  80     IMGFMT_YVU9,
  81     IMGFMT_IF09,
  82     IMGFMT_411P,
  83     IMGFMT_NV12,
  84     IMGFMT_NV21,
  85     IMGFMT_YUY2,
  86     IMGFMT_UYVY,
  87     IMGFMT_440P,
  88 // RGB and grayscale (Y8 and Y800):
  89     IMGFMT_BGR32,
  90     IMGFMT_RGB32,
  91     IMGFMT_BGR24,
  92     IMGFMT_RGB24,
  93     IMGFMT_RGB48LE,
  94     IMGFMT_RGB48BE,
  95     IMGFMT_BGR16,
  96     IMGFMT_RGB16,
  97     IMGFMT_BGR15,
  98     IMGFMT_RGB15,
  99     IMGFMT_BGR12,
 100     IMGFMT_RGB12,
 101     IMGFMT_Y800,
 102     IMGFMT_Y8,
 103     IMGFMT_BGR8,
 104     IMGFMT_RGB8,
 105     IMGFMT_BGR4,
 106     IMGFMT_RGB4,
 107     IMGFMT_BG4B,
 108     IMGFMT_RG4B,
 109     IMGFMT_BGR1,
 110     IMGFMT_RGB1,
 111     0
 112 };
 113
 114 /**
 115  * A list of preferred conversions, in order of preference.
 116  * This should be used for conversions that e.g. involve no scaling
 117  * or to stop vf_scale from choosing a conversion that has no
 118  * fast assembler implementation.
 119  */
 120 static int preferred_conversions[][2] = {
 121     {IMGFMT_YUY2, IMGFMT_UYVY},
 122     {IMGFMT_YUY2, IMGFMT_422P},
 123     {IMGFMT_UYVY, IMGFMT_YUY2},
 124     {IMGFMT_UYVY, IMGFMT_422P},
 125     {IMGFMT_422P, IMGFMT_YUY2},
 126     {IMGFMT_422P, IMGFMT_UYVY},
 127     {0, 0}
 128 };
 129
 130 static unsigned int find_best_out(vf_instance_t *vf, int in_format){
 131     unsigned int best=0;
 132     int i = -1;
 133     int j = -1;
 134     int format = 0;
 135
 136     // find the best outfmt:
 137     while (1) {
 138         int ret;
 139         if (j < 0) {
 140             format = in_format;
 141             j = 0;
 142         } else if (i < 0) {
 143             while (preferred_conversions[j][0] &&
 144                    preferred_conversions[j][0] != in_format)
 145                 j++;
 146             format = preferred_conversions[j++][1];
 147             // switch to standard list
 148             if (!format)
 149                 i = 0;
 150         }
 151         if (i >= 0)
 152             format = outfmt_list[i++];
 153         if (!format)
 154             break;
 155         ret = vf_next_query_format(vf, format);
 156
 157         mp_msg(MSGT_VFILTER,MSGL_DBG2,"scale: query(%s) -> %d\n",vo_format_name(format),ret&3);
 158         if(ret&VFCAP_CSP_SUPPORTED_BY_HW){
 159             best=format; // no conversion -> bingo!
 160             break;
 161         }
 162         if(ret&VFCAP_CSP_SUPPORTED && !best)
 163             best=format; // best with conversion
 164     }
 165     return best;
 166 }
 167
 168 static int config(struct vf_instance *vf,
 169         int width, int height, int d_width, int d_height,
 170         unsigned int flags, unsigned int outfmt){
 171     unsigned int best=find_best_out(vf, outfmt);
 172     int vo_flags;
 173     int int_sws_flags=0;
 174     int round_w=0, round_h=0;
 175     int i;
 176     SwsFilter *srcFilter, *dstFilter;
 177     enum PixelFormat dfmt, sfmt;
 178
 179     if(!best){
 180         mp_msg(MSGT_VFILTER,MSGL_WARN,"SwScale: no supported outfmt found :(\n");
 181         return 0;
 182     }
 183     sfmt = imgfmt2pixfmt(outfmt);
 184     if (outfmt == IMGFMT_RGB8 || outfmt == IMGFMT_BGR8) sfmt = PIX_FMT_PAL8;
 185     dfmt = imgfmt2pixfmt(best);
 186
 187     vo_flags=vf->next->query_format(vf->next,best);
 188
 189     // scaling to dwidth*d_height, if all these TRUE:
 190     // - option -zoom
 191     // - no other sw/hw up/down scaling avail.
 192     // - we're after postproc
 193     // - user didn't set w:h
 194     if(!(vo_flags&VFCAP_POSTPROC) && (flags&4) &&
 195             vf->priv->w<0 && vf->priv->h<0){    // -zoom
 196         int x=(vo_flags&VFCAP_SWSCALE) ? 0 : 1;
 197         if(d_width<width || d_height<height){
 198             // downscale!
 199             if(vo_flags&VFCAP_HWSCALE_DOWN) x=0;
 200         } else {
 201             // upscale:
 202             if(vo_flags&VFCAP_HWSCALE_UP) x=0;
 203         }
 204         if(x){
 205             // user wants sw scaling! (-zoom)
 206             vf->priv->w=d_width;
 207             vf->priv->h=d_height;
 208         }
 209     }
 210
 211     if(vf->priv->noup){
 212         if((vf->priv->w > width) + (vf->priv->h > height) >= vf->priv->noup){
 213             vf->priv->w= width;
 214             vf->priv->h= height;
 215         }
 216     }
 217
 218     if (vf->priv->w <= -8) {
 219       vf->priv->w += 8;
 220       round_w = 1;
 221     }
 222     if (vf->priv->h <= -8) {
 223       vf->priv->h += 8;
 224       round_h = 1;
 225     }
 226
 227     if (vf->priv->w < -3 || vf->priv->h < -3 ||
 228          (vf->priv->w < -1 && vf->priv->h < -1)) {
 229       // TODO: establish a direct connection to the user's brain
 230       // and find out what the heck he thinks MPlayer should do
 231       // with this nonsense.
 232       mp_msg(MSGT_VFILTER, MSGL_ERR, "SwScale: EUSERBROKEN Check your parameters, they make no sense!\n");
 233       return 0;
 234     }
 235
 236     if (vf->priv->w == -1)
 237       vf->priv->w = width;
 238     if (vf->priv->w == 0)
 239       vf->priv->w = d_width;
 240
 241     if (vf->priv->h == -1)
 242       vf->priv->h = height;
 243     if (vf->priv->h == 0)
 244       vf->priv->h = d_height;
 245
 246     if (vf->priv->w == -3)
 247       vf->priv->w = vf->priv->h * width / height;
 248     if (vf->priv->w == -2)
 249       vf->priv->w = vf->priv->h * d_width / d_height;
 250
 251     if (vf->priv->h == -3)
 252       vf->priv->h = vf->priv->w * height / width;
 253     if (vf->priv->h == -2)
 254       vf->priv->h = vf->priv->w * d_height / d_width;
 255
 256     if (round_w)
 257       vf->priv->w = ((vf->priv->w + 8) / 16) * 16;
 258     if (round_h)
 259       vf->priv->h = ((vf->priv->h + 8) / 16) * 16;
 260
 261     // calculate the missing parameters:
 262     switch(best) {
 263     case IMGFMT_YV12:           /* YV12 needs w & h rounded to 2 */
 264     case IMGFMT_I420:
 265     case IMGFMT_IYUV:
 266     case IMGFMT_NV12:
 267     case IMGFMT_NV21:
 268       vf->priv->h = (vf->priv->h + 1) & ~1;
 269     case IMGFMT_YUY2:           /* YUY2 needs w rounded to 2 */
 270     case IMGFMT_UYVY:
 271       vf->priv->w = (vf->priv->w + 1) & ~1;
 272     }
 273
 274     mp_msg(MSGT_VFILTER,MSGL_DBG2,"SwScale: scaling %dx%d %s to %dx%d %s  \n",
 275         width,height,vo_format_name(outfmt),
 276         vf->priv->w,vf->priv->h,vo_format_name(best));
 277
 278     // free old ctx:
 279     if(vf->priv->ctx) sws_freeContext(vf->priv->ctx);
 280     if(vf->priv->ctx2)sws_freeContext(vf->priv->ctx2);
 281
 282     // new swscaler:
 283     sws_getFlagsAndFilterFromCmdLine(&int_sws_flags, &srcFilter, &dstFilter);
 284     int_sws_flags|= vf->priv->v_chr_drop << SWS_SRC_V_CHR_DROP_SHIFT;
 285     int_sws_flags|= vf->priv->accurate_rnd * SWS_ACCURATE_RND;
 286     vf->priv->ctx=sws_getContext(width, height >> vf->priv->interlaced,
 287             sfmt,
 288                   vf->priv->w, vf->priv->h >> vf->priv->interlaced,
 289             dfmt,
 290             int_sws_flags | get_sws_cpuflags(), srcFilter, dstFilter, vf->priv->param);
 291     if(vf->priv->interlaced){
 292         vf->priv->ctx2=sws_getContext(width, height >> 1,
 293             sfmt,
 294                   vf->priv->w, vf->priv->h >> 1,
 295             dfmt,
 296             int_sws_flags | get_sws_cpuflags(), srcFilter, dstFilter, vf->priv->param);
 297     }
 298     if(!vf->priv->ctx){
 299         // error...
 300         mp_msg(MSGT_VFILTER,MSGL_WARN,"Couldn't init SwScaler for this setup\n");
 301         return 0;
 302     }
 303     vf->priv->fmt=best;
 304
 305     if(vf->priv->palette){
 306         free(vf->priv->palette);
 307         vf->priv->palette=NULL;
 308     }
 309     switch(best){
 310     case IMGFMT_RGB8: {
 311       /* set 332 palette for 8 bpp */
 312         vf->priv->palette=malloc(4*256);
 313         for(i=0; i<256; i++){
 314             vf->priv->palette[4*i+0]=4*(i>>6)*21;
 315             vf->priv->palette[4*i+1]=4*((i>>3)&7)*9;
 316             vf->priv->palette[4*i+2]=4*((i&7)&7)*9;
 317             vf->priv->palette[4*i+3]=0;
 318         }
 319         break; }
 320     case IMGFMT_BGR8: {
 321       /* set 332 palette for 8 bpp */
 322         vf->priv->palette=malloc(4*256);
 323         for(i=0; i<256; i++){
 324             vf->priv->palette[4*i+0]=4*(i&3)*21;
 325             vf->priv->palette[4*i+1]=4*((i>>2)&7)*9;
 326             vf->priv->palette[4*i+2]=4*((i>>5)&7)*9;
 327             vf->priv->palette[4*i+3]=0;
 328         }
 329         break; }
 330     case IMGFMT_BGR4:
 331     case IMGFMT_BG4B: {
 332         vf->priv->palette=malloc(4*16);
 333         for(i=0; i<16; i++){
 334             vf->priv->palette[4*i+0]=4*(i&1)*63;
 335             vf->priv->palette[4*i+1]=4*((i>>1)&3)*21;
 336             vf->priv->palette[4*i+2]=4*((i>>3)&1)*63;
 337             vf->priv->palette[4*i+3]=0;
 338         }
 339         break; }
 340     case IMGFMT_RGB4:
 341     case IMGFMT_RG4B: {
 342         vf->priv->palette=malloc(4*16);
 343         for(i=0; i<16; i++){
 344             vf->priv->palette[4*i+0]=4*(i>>3)*63;
 345             vf->priv->palette[4*i+1]=4*((i>>1)&3)*21;
 346             vf->priv->palette[4*i+2]=4*((i&1)&1)*63;
 347             vf->priv->palette[4*i+3]=0;
 348         }
 349         break; }
 350     }
 351
 352     if(!opt_screen_size_x && !opt_screen_size_y && !(screen_size_xy >= 0.001)){
 353         // Compute new d_width and d_height, preserving aspect
 354         // while ensuring that both are >= output size in pixels.
 355         if (vf->priv->h * d_width > vf->priv->w * d_height) {
 356                 d_width = vf->priv->h * d_width / d_height;
 357                 d_height = vf->priv->h;
 358         } else {
 359                 d_height = vf->priv->w * d_height / d_width;
 360                 d_width = vf->priv->w;
 361         }
 362         //d_width=d_width*vf->priv->w/width;
 363         //d_height=d_height*vf->priv->h/height;
 364     }
 365     return vf_next_config(vf,vf->priv->w,vf->priv->h,d_width,d_height,flags,best);
 366 }
 367
 368 static void start_slice(struct vf_instance *vf, mp_image_t *mpi){
 369 //    printf("start_slice called! flag=%d\n",mpi->flags&MP_IMGFLAG_DRAW_CALLBACK);
 370     if(!(mpi->flags&MP_IMGFLAG_DRAW_CALLBACK)) return; // shouldn't happen
 371     // they want slices!!! allocate the buffer.
 372     mpi->priv=vf->dmpi=vf_get_image(vf->next,vf->priv->fmt,
 373 //      mpi->type, mpi->flags & (~MP_IMGFLAG_DRAW_CALLBACK),
 374         MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE | MP_IMGFLAG_PREFER_ALIGNED_STRIDE,
 375         vf->priv->w, vf->priv->h);
 376 }
 377
 378 static void scale(struct SwsContext *sws1, struct SwsContext *sws2, uint8_t *src[MP_MAX_PLANES], int src_stride[MP_MAX_PLANES],
 379                   int y, int h,  uint8_t *dst[MP_MAX_PLANES], int dst_stride[MP_MAX_PLANES], int interlaced){
 380     uint8_t *src2[MP_MAX_PLANES]={src[0], src[1], src[2], src[3]};
 381 #if HAVE_BIGENDIAN
 382     uint32_t pal2[256];
 383     if (src[1] && !src[2]){
 384         int i;
 385         for(i=0; i<256; i++)
 386             pal2[i]= bswap_32(((uint32_t*)src[1])[i]);
 387         src2[1]= pal2;
 388     }
 389 #endif
 390
 391     if(interlaced){
 392         int i;
 393         uint8_t *dst2[MP_MAX_PLANES]={dst[0], dst[1], dst[2], dst[3]};
 394         int src_stride2[MP_MAX_PLANES]={2*src_stride[0], 2*src_stride[1], 2*src_stride[2], 2*src_stride[3]};
 395         int dst_stride2[MP_MAX_PLANES]={2*dst_stride[0], 2*dst_stride[1], 2*dst_stride[2], 2*dst_stride[3]};
 396
 397         sws_scale(sws1, src2, src_stride2, y>>1, h>>1, dst2, dst_stride2);
 398         for(i=0; i<MP_MAX_PLANES; i++){
 399             src2[i] += src_stride[i];
 400             dst2[i] += dst_stride[i];
 401         }
 402         sws_scale(sws2, src2, src_stride2, y>>1, h>>1, dst2, dst_stride2);
 403     }else{
 404         sws_scale(sws1, src2, src_stride, y, h, dst, dst_stride);
 405     }
 406 }
 407
 408 static void draw_slice(struct vf_instance *vf,
 409         unsigned char** src, int* stride, int w,int h, int x, int y){
 410     mp_image_t *dmpi=vf->dmpi;
 411     if(!dmpi){
 412         mp_msg(MSGT_VFILTER,MSGL_FATAL,"vf_scale: draw_slice() called with dmpi=NULL (no get_image?)\n");
 413         return;
 414     }
 415 //    printf("vf_scale::draw_slice() y=%d h=%d\n",y,h);
 416     scale(vf->priv->ctx, vf->priv->ctx2, src, stride, y, h, dmpi->planes, dmpi->stride, vf->priv->interlaced);
 417 }
 418
 419 static int put_image(struct vf_instance *vf, mp_image_t *mpi, double pts){
 420     mp_image_t *dmpi=mpi->priv;
 421
 422 //    printf("vf_scale::put_image(): processing whole frame! dmpi=%p flag=%d\n",
 423 //      dmpi, (mpi->flags&MP_IMGFLAG_DRAW_CALLBACK));
 424
 425   if(!(mpi->flags&MP_IMGFLAG_DRAW_CALLBACK && dmpi)){
 426
 427     // hope we'll get DR buffer:
 428     dmpi=vf_get_image(vf->next,vf->priv->fmt,
 429         MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE | MP_IMGFLAG_PREFER_ALIGNED_STRIDE,
 430         vf->priv->w, vf->priv->h);
 431
 432       scale(vf->priv->ctx, vf->priv->ctx, mpi->planes,mpi->stride,0,mpi->h,dmpi->planes,dmpi->stride, vf->priv->interlaced);
 433   }
 434
 435     if(vf->priv->w==mpi->w && vf->priv->h==mpi->h){
 436         // just conversion, no scaling -> keep postprocessing data
 437         // this way we can apply pp filter to non-yv12 source using scaler
 438         vf_clone_mpi_attributes(dmpi, mpi);
 439     }
 440
 441     if(vf->priv->palette) dmpi->planes[1]=vf->priv->palette; // export palette!
 442
 443     return vf_next_put_image(vf,dmpi, pts);
 444 }
 445
 446 static int control(struct vf_instance *vf, int request, void* data){
 447     int *table;
 448     int *inv_table;
 449     int r;
 450     int brightness, contrast, saturation, srcRange, dstRange;
 451     vf_equalizer_t *eq;
 452
 453   if(vf->priv->ctx)
 454     switch(request){
 455     case VFCTRL_GET_EQUALIZER:
 456         r= sws_getColorspaceDetails(vf->priv->ctx, &inv_table, &srcRange, &table, &dstRange, &brightness, &contrast, &saturation);
 457         if(r<0) break;
 458
 459         eq = data;
 460         if (!strcmp(eq->item,"brightness")) {
 461                 eq->value =  ((brightness*100) + (1<<15))>>16;
 462         }
 463         else if (!strcmp(eq->item,"contrast")) {
 464                 eq->value = (((contrast  *100) + (1<<15))>>16) - 100;
 465         }
 466         else if (!strcmp(eq->item,"saturation")) {
 467                 eq->value = (((saturation*100) + (1<<15))>>16) - 100;
 468         }
 469         else
 470                 break;
 471         return CONTROL_TRUE;
 472     case VFCTRL_SET_EQUALIZER:
 473         r= sws_getColorspaceDetails(vf->priv->ctx, &inv_table, &srcRange, &table, &dstRange, &brightness, &contrast, &saturation);
 474         if(r<0) break;
 475 //printf("set %f %f %f\n", brightness/(float)(1<<16), contrast/(float)(1<<16), saturation/(float)(1<<16));
 476         eq = data;
 477
 478         if (!strcmp(eq->item,"brightness")) {
 479                 brightness = (( eq->value     <<16) + 50)/100;
 480         }
 481         else if (!strcmp(eq->item,"contrast")) {
 482                 contrast   = (((eq->value+100)<<16) + 50)/100;
 483         }
 484         else if (!strcmp(eq->item,"saturation")) {
 485                 saturation = (((eq->value+100)<<16) + 50)/100;
 486         }
 487         else
 488                 break;
 489
 490         r= sws_setColorspaceDetails(vf->priv->ctx, inv_table, srcRange, table, dstRange, brightness, contrast, saturation);
 491         if(r<0) break;
 492         if(vf->priv->ctx2){
 493             r= sws_setColorspaceDetails(vf->priv->ctx2, inv_table, srcRange, table, dstRange, brightness, contrast, saturation);
 494             if(r<0) break;
 495         }
 496
 497         return CONTROL_TRUE;
 498     default:
 499         break;
 500     }
 501
 502     return vf_next_control(vf,request,data);
 503 }
 504
 505 //===========================================================================//
 506
 507 //  supported Input formats: YV12, I420, IYUV, YUY2, UYVY, BGR32, BGR24, BGR16, BGR15, RGB32, RGB24, Y8, Y800
 508
 509 static int query_format(struct vf_instance *vf, unsigned int fmt){
 510     switch(fmt){
 511     case IMGFMT_YV12:
 512     case IMGFMT_I420:
 513     case IMGFMT_IYUV:
 514     case IMGFMT_UYVY:
 515     case IMGFMT_YUY2:
 516     case IMGFMT_BGR32:
 517     case IMGFMT_BGR24:
 518     case IMGFMT_BGR16:
 519     case IMGFMT_BGR15:
 520     case IMGFMT_RGB32:
 521     case IMGFMT_RGB24:
 522     case IMGFMT_Y800:
 523     case IMGFMT_Y8:
 524     case IMGFMT_YVU9:
 525     case IMGFMT_IF09:
 526     case IMGFMT_444P:
 527     case IMGFMT_422P:
 528     case IMGFMT_411P:
 529     case IMGFMT_440P:
 530     case IMGFMT_420A:
 531     case IMGFMT_444P16_LE:
 532     case IMGFMT_444P16_BE:
 533     case IMGFMT_422P16_LE:
 534     case IMGFMT_422P16_BE:
 535     case IMGFMT_420P16_LE:
 536     case IMGFMT_420P16_BE:
 537     case IMGFMT_BGR8:
 538     case IMGFMT_RGB8:
 539     case IMGFMT_BG4B:
 540     case IMGFMT_RG4B:
 541     case IMGFMT_RGB48LE:
 542     case IMGFMT_RGB48BE:
 543     {
 544         unsigned int best=find_best_out(vf, fmt);
 545         int flags;
 546         if(!best) return 0;      // no matching out-fmt
 547         flags=vf_next_query_format(vf,best);
 548         if(!(flags&(VFCAP_CSP_SUPPORTED|VFCAP_CSP_SUPPORTED_BY_HW))) return 0; // huh?
 549         if(fmt!=best) flags&=~VFCAP_CSP_SUPPORTED_BY_HW;
 550         // do not allow scaling, if we are before the PP fliter!
 551         if(!(flags&VFCAP_POSTPROC)) flags|=VFCAP_SWSCALE;
 552         return flags;
 553       }
 554     }
 555     return 0;   // nomatching in-fmt
 556 }
 557
 558 static void uninit(struct vf_instance *vf){
 559     if(vf->priv->ctx) sws_freeContext(vf->priv->ctx);
 560     if(vf->priv->ctx2) sws_freeContext(vf->priv->ctx2);
 561     if(vf->priv->palette) free(vf->priv->palette);
 562     free(vf->priv);
 563 }
 564
 565 static int vf_open(vf_instance_t *vf, char *args){
 566     vf->config=config;
 567     vf->start_slice=start_slice;
 568     vf->draw_slice=draw_slice;
 569     vf->put_image=put_image;
 570     vf->query_format=query_format;
 571     vf->control= control;
 572     vf->uninit=uninit;
 573     mp_msg(MSGT_VFILTER,MSGL_V,"SwScale params: %d x %d (-1=no scaling)\n",
 574     vf->priv->w,
 575     vf->priv->h);
 576
 577     return 1;
 578 }
 579
 580 //global sws_flags from the command line
 581 int sws_flags=2;
 582
 583 //global srcFilter
 584 static SwsFilter *src_filter= NULL;
 585
 586 float sws_lum_gblur= 0.0;
 587 float sws_chr_gblur= 0.0;
 588 int sws_chr_vshift= 0;
 589 int sws_chr_hshift= 0;
 590 float sws_chr_sharpen= 0.0;
 591 float sws_lum_sharpen= 0.0;
 592
 593 int get_sws_cpuflags(void){
 594     return
 595           (gCpuCaps.hasMMX   ? SWS_CPU_CAPS_MMX   : 0)
 596         | (gCpuCaps.hasMMX2  ? SWS_CPU_CAPS_MMX2  : 0)
 597         | (gCpuCaps.has3DNow ? SWS_CPU_CAPS_3DNOW : 0)
 598         | (gCpuCaps.hasAltiVec ? SWS_CPU_CAPS_ALTIVEC : 0);
 599 }
 600
 601 void sws_getFlagsAndFilterFromCmdLine(int *flags, SwsFilter **srcFilterParam, SwsFilter **dstFilterParam)
 602 {
 603         static int firstTime=1;
 604         *flags=0;
 605
 606 #if ARCH_X86
 607         if(gCpuCaps.hasMMX)
 608                 __asm__ volatile("emms\n\t"::: "memory"); //FIXME this should not be required but it IS (even for non-MMX versions)
 609 #endif
 610         if(firstTime)
 611         {
 612                 firstTime=0;
 613                 *flags= SWS_PRINT_INFO;
 614         }
 615         else if( mp_msg_test(MSGT_VFILTER,MSGL_DBG2) ) *flags= SWS_PRINT_INFO;
 616
 617         if(src_filter) sws_freeFilter(src_filter);
 618
 619         src_filter= sws_getDefaultFilter(
 620                 sws_lum_gblur, sws_chr_gblur,
 621                 sws_lum_sharpen, sws_chr_sharpen,
 622                 sws_chr_hshift, sws_chr_vshift, verbose>1);
 623
 624         switch(sws_flags)
 625         {
 626                 case 0: *flags|= SWS_FAST_BILINEAR; break;
 627                 case 1: *flags|= SWS_BILINEAR; break;
 628                 case 2: *flags|= SWS_BICUBIC; break;
 629                 case 3: *flags|= SWS_X; break;
 630                 case 4: *flags|= SWS_POINT; break;
 631                 case 5: *flags|= SWS_AREA; break;
 632                 case 6: *flags|= SWS_BICUBLIN; break;
 633                 case 7: *flags|= SWS_GAUSS; break;
 634                 case 8: *flags|= SWS_SINC; break;
 635                 case 9: *flags|= SWS_LANCZOS; break;
 636                 case 10:*flags|= SWS_SPLINE; break;
 637                 default:*flags|= SWS_BILINEAR; break;
 638         }
 639
 640         *srcFilterParam= src_filter;
 641         *dstFilterParam= NULL;
 642 }
 643
 644 // will use sws_flags & src_filter (from cmd line)
 645 struct SwsContext *sws_getContextFromCmdLine(int srcW, int srcH, int srcFormat, int dstW, int dstH, int dstFormat)
 646 {
 647         int flags;
 648         SwsFilter *dstFilterParam, *srcFilterParam;
 649         enum PixelFormat dfmt, sfmt;
 650
 651         dfmt = imgfmt2pixfmt(dstFormat);
 652         sfmt = imgfmt2pixfmt(srcFormat);
 653         if (srcFormat == IMGFMT_RGB8 || srcFormat == IMGFMT_BGR8) sfmt = PIX_FMT_PAL8;
 654         sws_getFlagsAndFilterFromCmdLine(&flags, &srcFilterParam, &dstFilterParam);
 655
 656         return sws_getContext(srcW, srcH, sfmt, dstW, dstH, dfmt, flags | get_sws_cpuflags(), srcFilterParam, dstFilterParam, NULL);
 657 }
 658
 659 /// An example of presets usage
 660 static const struct size_preset {
 661   char* name;
 662   int w, h;
 663 } vf_size_presets_defs[] = {
 664   // TODO add more 'standard' resolutions
 665   { "qntsc", 352, 240 },
 666   { "qpal", 352, 288 },
 667   { "ntsc", 720, 480 },
 668   { "pal", 720, 576 },
 669   { "sntsc", 640, 480 },
 670   { "spal", 768, 576 },
 671   { NULL, 0, 0}
 672 };
 673
 674 #define ST_OFF(f) M_ST_OFF(struct size_preset,f)
 675 static const m_option_t vf_size_preset_fields[] = {
 676   {"w", ST_OFF(w), CONF_TYPE_INT, M_OPT_MIN,1 ,0, NULL},
 677   {"h", ST_OFF(h), CONF_TYPE_INT, M_OPT_MIN,1 ,0, NULL},
 678   { NULL, NULL, 0, 0, 0, 0,  NULL }
 679 };
 680
 681 static const m_struct_t vf_size_preset = {
 682   "scale_size_preset",
 683   sizeof(struct size_preset),
 684   NULL,
 685   vf_size_preset_fields
 686 };
 687
 688 static const m_struct_t vf_opts;
 689 static const m_obj_presets_t size_preset = {
 690   &vf_size_preset, // Input struct desc
 691   &vf_opts, // Output struct desc
 692   vf_size_presets_defs, // The list of presets
 693   ST_OFF(name) // At wich offset is the name field in the preset struct
 694 };
 695
 696 /// Now the options
 697 #undef ST_OFF
 698 #define ST_OFF(f) M_ST_OFF(struct vf_priv_s,f)
 699 static const m_option_t vf_opts_fields[] = {
 700   {"w", ST_OFF(w), CONF_TYPE_INT, M_OPT_MIN,-11,0, NULL},
 701   {"h", ST_OFF(h), CONF_TYPE_INT, M_OPT_MIN,-11,0, NULL},
 702   {"interlaced", ST_OFF(interlaced), CONF_TYPE_INT, M_OPT_RANGE, 0, 1, NULL},
 703   {"chr-drop", ST_OFF(v_chr_drop), CONF_TYPE_INT, M_OPT_RANGE, 0, 3, NULL},
 704   {"param" , ST_OFF(param[0]), CONF_TYPE_DOUBLE, M_OPT_RANGE, 0.0, 100.0, NULL},
 705   {"param2", ST_OFF(param[1]), CONF_TYPE_DOUBLE, M_OPT_RANGE, 0.0, 100.0, NULL},
 706   // Note that here the 2 field is NULL (ie 0)
 707   // As we want this option to act on the option struct itself
 708   {"presize", 0, CONF_TYPE_OBJ_PRESETS, 0, 0, 0, &size_preset},
 709   {"noup", ST_OFF(noup), CONF_TYPE_INT, M_OPT_RANGE, 0, 2, NULL},
 710   {"arnd", ST_OFF(accurate_rnd), CONF_TYPE_FLAG, 0, 0, 1, NULL},
 711   { NULL, NULL, 0, 0, 0, 0,  NULL }
 712 };
 713
 714 static const m_struct_t vf_opts = {
 715   "scale",
 716   sizeof(struct vf_priv_s),
 717   &vf_priv_dflt,
 718   vf_opts_fields
 719 };
 720
 721 const vf_info_t vf_info_scale = {
 722     "software scaling",
 723     "scale",
 724     "A'rpi",
 725     "",
 726     vf_open,
 727     &vf_opts
 728 };
 729
 730 //===========================================================================//