Update to MPlayer SVN rev 29473 and FFmpeg SVN rev 19572.
[vaapi:athaifas-mplayer.git] / 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 #include "fmt-conversion.h"
14 #include "mpbswap.h"
15
16 #include "libswscale/swscale.h"
17 #include "vf_scale.h"
18
19 #include "m_option.h"
20 #include "m_struct.h"
21
22 static struct vf_priv_s {
23     int w,h;
24     int v_chr_drop;
25     double param[2];
26     unsigned int fmt;
27     struct SwsContext *ctx;
28     struct SwsContext *ctx2; //for interlaced slices only
29     unsigned char* palette;
30     int interlaced;
31     int noup;
32     int accurate_rnd;
33     int query_format_cache[64];
34 } const vf_priv_dflt = {
35   -1,-1,
36   0,
37   {SWS_PARAM_DEFAULT, SWS_PARAM_DEFAULT},
38   0,
39   NULL,
40   NULL,
41   NULL
42 };
43
44 extern int opt_screen_size_x;
45 extern int opt_screen_size_y;
46 extern float screen_size_xy;
47
48 //===========================================================================//
49
50 void sws_getFlagsAndFilterFromCmdLine(int *flags, SwsFilter **srcFilterParam, SwsFilter **dstFilterParam);
51
52 static unsigned int outfmt_list[]={
53 // YUV:
54     IMGFMT_444P,
55     IMGFMT_422P,
56     IMGFMT_YV12,
57     IMGFMT_I420,
58     IMGFMT_IYUV,
59     IMGFMT_YVU9,
60     IMGFMT_IF09,
61     IMGFMT_411P,
62     IMGFMT_NV12,
63     IMGFMT_NV21,
64     IMGFMT_YUY2,
65     IMGFMT_UYVY,
66 // RGB and grayscale (Y8 and Y800):
67     IMGFMT_BGR32,
68     IMGFMT_RGB32,
69     IMGFMT_BGR24,
70     IMGFMT_RGB24,
71     IMGFMT_BGR16,
72     IMGFMT_RGB16,
73     IMGFMT_BGR15,
74     IMGFMT_RGB15,
75     IMGFMT_Y800,
76     IMGFMT_Y8,
77     IMGFMT_BGR8,
78     IMGFMT_RGB8,
79     IMGFMT_BGR4,
80     IMGFMT_RGB4,
81     IMGFMT_BG4B,
82     IMGFMT_RG4B,
83     IMGFMT_BGR1,
84     IMGFMT_RGB1,
85     0
86 };
87
88 static unsigned int find_best_out(vf_instance_t *vf){
89     unsigned int best=0;
90     int i;
91
92     // find the best outfmt:
93     for(i=0; i<sizeof(outfmt_list)/sizeof(int)-1; i++){
94         const int format= outfmt_list[i];
95         int ret= vf->priv->query_format_cache[i]-1;
96         if(ret == -1){
97             ret= vf_next_query_format(vf, outfmt_list[i]);
98             vf->priv->query_format_cache[i]= ret+1;
99         }
100
101         mp_msg(MSGT_VFILTER,MSGL_DBG2,"scale: query(%s) -> %d\n",vo_format_name(format),ret&3);
102         if(ret&VFCAP_CSP_SUPPORTED_BY_HW){
103             best=format; // no conversion -> bingo!
104             break;
105         }
106         if(ret&VFCAP_CSP_SUPPORTED && !best)
107             best=format; // best with conversion
108     }
109     return best;
110 }
111
112 static int config(struct vf_instance_s* vf,
113         int width, int height, int d_width, int d_height,
114         unsigned int flags, unsigned int outfmt){
115     unsigned int best=find_best_out(vf);
116     int vo_flags;
117     int int_sws_flags=0;
118     int round_w=0, round_h=0;
119     int i;
120     SwsFilter *srcFilter, *dstFilter;
121     enum PixelFormat dfmt, sfmt;
122
123     if(!best){
124         mp_msg(MSGT_VFILTER,MSGL_WARN,"SwScale: no supported outfmt found :(\n");
125         return 0;
126     }
127     sfmt = imgfmt2pixfmt(outfmt);
128     if (outfmt == IMGFMT_RGB8 || outfmt == IMGFMT_BGR8) sfmt = PIX_FMT_PAL8;
129     dfmt = imgfmt2pixfmt(best);
130
131     vo_flags=vf->next->query_format(vf->next,best);
132
133     // scaling to dwidth*d_height, if all these TRUE:
134     // - option -zoom
135     // - no other sw/hw up/down scaling avail.
136     // - we're after postproc
137     // - user didn't set w:h
138     if(!(vo_flags&VFCAP_POSTPROC) && (flags&4) &&
139             vf->priv->w<0 && vf->priv->h<0){    // -zoom
140         int x=(vo_flags&VFCAP_SWSCALE) ? 0 : 1;
141         if(d_width<width || d_height<height){
142             // downscale!
143             if(vo_flags&VFCAP_HWSCALE_DOWN) x=0;
144         } else {
145             // upscale:
146             if(vo_flags&VFCAP_HWSCALE_UP) x=0;
147         }
148         if(x){
149             // user wants sw scaling! (-zoom)
150             vf->priv->w=d_width;
151             vf->priv->h=d_height;
152         }
153     }
154
155     if(vf->priv->noup){
156         if((vf->priv->w > width) + (vf->priv->h > height) >= vf->priv->noup){
157             vf->priv->w= width;
158             vf->priv->h= height;
159         }
160     }
161
162     if (vf->priv->w <= -8) {
163       vf->priv->w += 8;
164       round_w = 1;
165     }
166     if (vf->priv->h <= -8) {
167       vf->priv->h += 8;
168       round_h = 1;
169     }
170
171     if (vf->priv->w < -3 || vf->priv->h < -3 ||
172          (vf->priv->w < -1 && vf->priv->h < -1)) {
173       // TODO: establish a direct connection to the user's brain
174       // and find out what the heck he thinks MPlayer should do
175       // with this nonsense.
176       mp_msg(MSGT_VFILTER, MSGL_ERR, "SwScale: EUSERBROKEN Check your parameters, they make no sense!\n");
177       return 0;
178     }
179
180     if (vf->priv->w == -1)
181       vf->priv->w = width;
182     if (vf->priv->w == 0)
183       vf->priv->w = d_width;
184
185     if (vf->priv->h == -1)
186       vf->priv->h = height;
187     if (vf->priv->h == 0)
188       vf->priv->h = d_height;
189
190     if (vf->priv->w == -3)
191       vf->priv->w = vf->priv->h * width / height;
192     if (vf->priv->w == -2)
193       vf->priv->w = vf->priv->h * d_width / d_height;
194
195     if (vf->priv->h == -3)
196       vf->priv->h = vf->priv->w * height / width;
197     if (vf->priv->h == -2)
198       vf->priv->h = vf->priv->w * d_height / d_width;
199
200     if (round_w)
201       vf->priv->w = ((vf->priv->w + 8) / 16) * 16;
202     if (round_h)
203       vf->priv->h = ((vf->priv->h + 8) / 16) * 16;
204
205     // calculate the missing parameters:
206     switch(best) {
207     case IMGFMT_YV12:           /* YV12 needs w & h rounded to 2 */
208     case IMGFMT_I420:
209     case IMGFMT_IYUV:
210     case IMGFMT_NV12:
211     case IMGFMT_NV21:
212       vf->priv->h = (vf->priv->h + 1) & ~1;
213     case IMGFMT_YUY2:           /* YUY2 needs w rounded to 2 */
214     case IMGFMT_UYVY:
215       vf->priv->w = (vf->priv->w + 1) & ~1;
216     }
217
218     mp_msg(MSGT_VFILTER,MSGL_DBG2,"SwScale: scaling %dx%d %s to %dx%d %s  \n",
219         width,height,vo_format_name(outfmt),
220         vf->priv->w,vf->priv->h,vo_format_name(best));
221
222     // free old ctx:
223     if(vf->priv->ctx) sws_freeContext(vf->priv->ctx);
224     if(vf->priv->ctx2)sws_freeContext(vf->priv->ctx2);
225
226     // new swscaler:
227     sws_getFlagsAndFilterFromCmdLine(&int_sws_flags, &srcFilter, &dstFilter);
228     int_sws_flags|= vf->priv->v_chr_drop << SWS_SRC_V_CHR_DROP_SHIFT;
229     int_sws_flags|= vf->priv->accurate_rnd * SWS_ACCURATE_RND;
230     vf->priv->ctx=sws_getContext(width, height >> vf->priv->interlaced,
231             sfmt,
232                   vf->priv->w, vf->priv->h >> vf->priv->interlaced,
233             dfmt,
234             int_sws_flags | get_sws_cpuflags(), srcFilter, dstFilter, vf->priv->param);
235     if(vf->priv->interlaced){
236         vf->priv->ctx2=sws_getContext(width, height >> 1,
237             sfmt,
238                   vf->priv->w, vf->priv->h >> 1,
239             dfmt,
240             int_sws_flags | get_sws_cpuflags(), srcFilter, dstFilter, vf->priv->param);
241     }
242     if(!vf->priv->ctx){
243         // error...
244         mp_msg(MSGT_VFILTER,MSGL_WARN,"Couldn't init SwScaler for this setup\n");
245         return 0;
246     }
247     vf->priv->fmt=best;
248
249     if(vf->priv->palette){
250         free(vf->priv->palette);
251         vf->priv->palette=NULL;
252     }
253     switch(best){
254     case IMGFMT_RGB8: {
255       /* set 332 palette for 8 bpp */
256         vf->priv->palette=malloc(4*256);
257         for(i=0; i<256; i++){
258             vf->priv->palette[4*i+0]=4*(i>>6)*21;
259             vf->priv->palette[4*i+1]=4*((i>>3)&7)*9;
260             vf->priv->palette[4*i+2]=4*((i&7)&7)*9;
261             vf->priv->palette[4*i+3]=0;
262         }
263         break; }
264     case IMGFMT_BGR8: {
265       /* set 332 palette for 8 bpp */
266         vf->priv->palette=malloc(4*256);
267         for(i=0; i<256; i++){
268             vf->priv->palette[4*i+0]=4*(i&3)*21;
269             vf->priv->palette[4*i+1]=4*((i>>2)&7)*9;
270             vf->priv->palette[4*i+2]=4*((i>>5)&7)*9;
271             vf->priv->palette[4*i+3]=0;
272         }
273         break; }
274     case IMGFMT_BGR4:
275     case IMGFMT_BG4B: {
276         vf->priv->palette=malloc(4*16);
277         for(i=0; i<16; i++){
278             vf->priv->palette[4*i+0]=4*(i&1)*63;
279             vf->priv->palette[4*i+1]=4*((i>>1)&3)*21;
280             vf->priv->palette[4*i+2]=4*((i>>3)&1)*63;
281             vf->priv->palette[4*i+3]=0;
282         }
283         break; }
284     case IMGFMT_RGB4:
285     case IMGFMT_RG4B: {
286         vf->priv->palette=malloc(4*16);
287         for(i=0; i<16; i++){
288             vf->priv->palette[4*i+0]=4*(i>>3)*63;
289             vf->priv->palette[4*i+1]=4*((i>>1)&3)*21;
290             vf->priv->palette[4*i+2]=4*((i&1)&1)*63;
291             vf->priv->palette[4*i+3]=0;
292         }
293         break; }
294     }
295
296     if(!opt_screen_size_x && !opt_screen_size_y && !(screen_size_xy >= 0.001)){
297         // Compute new d_width and d_height, preserving aspect
298         // while ensuring that both are >= output size in pixels.
299         if (vf->priv->h * d_width > vf->priv->w * d_height) {
300                 d_width = vf->priv->h * d_width / d_height;
301                 d_height = vf->priv->h;
302         } else {
303                 d_height = vf->priv->w * d_height / d_width;
304                 d_width = vf->priv->w;
305         }
306         //d_width=d_width*vf->priv->w/width;
307         //d_height=d_height*vf->priv->h/height;
308     }
309     return vf_next_config(vf,vf->priv->w,vf->priv->h,d_width,d_height,flags,best);
310 }
311
312 static void start_slice(struct vf_instance_s* vf, mp_image_t *mpi){
313 //    printf("start_slice called! flag=%d\n",mpi->flags&MP_IMGFLAG_DRAW_CALLBACK);
314     if(!(mpi->flags&MP_IMGFLAG_DRAW_CALLBACK)) return; // shouldn't happen
315     // they want slices!!! allocate the buffer.
316     mpi->priv=vf->dmpi=vf_get_image(vf->next,vf->priv->fmt,
317 //      mpi->type, mpi->flags & (~MP_IMGFLAG_DRAW_CALLBACK),
318         MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE | MP_IMGFLAG_PREFER_ALIGNED_STRIDE,
319         vf->priv->w, vf->priv->h);
320 }
321
322 static void scale(struct SwsContext *sws1, struct SwsContext *sws2, uint8_t *src[MP_MAX_PLANES], int src_stride[MP_MAX_PLANES],
323                   int y, int h,  uint8_t *dst[MP_MAX_PLANES], int dst_stride[MP_MAX_PLANES], int interlaced){
324     uint8_t *src2[MP_MAX_PLANES]={src[0], src[1], src[2]};
325 #if HAVE_BIGENDIAN
326     uint32_t pal2[256];
327     if (src[1] && !src[2]){
328         int i;
329         for(i=0; i<256; i++)
330             pal2[i]= bswap_32(((uint32_t*)src[1])[i]);
331         src2[1]= pal2;
332     }
333 #endif
334
335     if(interlaced){
336         int i;
337         uint8_t *dst2[MP_MAX_PLANES]={dst[0], dst[1], dst[2]};
338         int src_stride2[MP_MAX_PLANES]={2*src_stride[0], 2*src_stride[1], 2*src_stride[2]};
339         int dst_stride2[MP_MAX_PLANES]={2*dst_stride[0], 2*dst_stride[1], 2*dst_stride[2]};
340
341         sws_scale_ordered(sws1, src2, src_stride2, y>>1, h>>1, dst2, dst_stride2);
342         for(i=0; i<3; i++){
343             src2[i] += src_stride[i];
344             dst2[i] += dst_stride[i];
345         }
346         sws_scale_ordered(sws2, src2, src_stride2, y>>1, h>>1, dst2, dst_stride2);
347     }else{
348         sws_scale_ordered(sws1, src2, src_stride, y, h, dst, dst_stride);
349     }
350 }
351
352 static void draw_slice(struct vf_instance_s* vf,
353         unsigned char** src, int* stride, int w,int h, int x, int y){
354     mp_image_t *dmpi=vf->dmpi;
355     if(!dmpi){
356         mp_msg(MSGT_VFILTER,MSGL_FATAL,"vf_scale: draw_slice() called with dmpi=NULL (no get_image?)\n");
357         return;
358     }
359 //    printf("vf_scale::draw_slice() y=%d h=%d\n",y,h);
360     scale(vf->priv->ctx, vf->priv->ctx2, src, stride, y, h, dmpi->planes, dmpi->stride, vf->priv->interlaced);
361 }
362
363 static int put_image(struct vf_instance_s* vf, mp_image_t *mpi, double pts){
364     mp_image_t *dmpi=mpi->priv;
365
366 //    printf("vf_scale::put_image(): processing whole frame! dmpi=%p flag=%d\n",
367 //      dmpi, (mpi->flags&MP_IMGFLAG_DRAW_CALLBACK));
368
369   if(!(mpi->flags&MP_IMGFLAG_DRAW_CALLBACK && dmpi)){
370
371     // hope we'll get DR buffer:
372     dmpi=vf_get_image(vf->next,vf->priv->fmt,
373         MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE | MP_IMGFLAG_PREFER_ALIGNED_STRIDE,
374         vf->priv->w, vf->priv->h);
375
376       scale(vf->priv->ctx, vf->priv->ctx, mpi->planes,mpi->stride,0,mpi->h,dmpi->planes,dmpi->stride, vf->priv->interlaced);
377   }
378
379     if(vf->priv->w==mpi->w && vf->priv->h==mpi->h){
380         // just conversion, no scaling -> keep postprocessing data
381         // this way we can apply pp filter to non-yv12 source using scaler
382         vf_clone_mpi_attributes(dmpi, mpi);
383     }
384
385     if(vf->priv->palette) dmpi->planes[1]=vf->priv->palette; // export palette!
386
387     return vf_next_put_image(vf,dmpi, pts);
388 }
389
390 static int control(struct vf_instance_s* vf, int request, void* data){
391     int *table;
392     int *inv_table;
393     int r;
394     int brightness, contrast, saturation, srcRange, dstRange;
395     vf_equalizer_t *eq;
396
397   if(vf->priv->ctx)
398     switch(request){
399     case VFCTRL_GET_EQUALIZER:
400         r= sws_getColorspaceDetails(vf->priv->ctx, &inv_table, &srcRange, &table, &dstRange, &brightness, &contrast, &saturation);
401         if(r<0) break;
402
403         eq = data;
404         if (!strcmp(eq->item,"brightness")) {
405                 eq->value =  ((brightness*100) + (1<<15))>>16;
406         }
407         else if (!strcmp(eq->item,"contrast")) {
408                 eq->value = (((contrast  *100) + (1<<15))>>16) - 100;
409         }
410         else if (!strcmp(eq->item,"saturation")) {
411                 eq->value = (((saturation*100) + (1<<15))>>16) - 100;
412         }
413         else
414                 break;
415         return CONTROL_TRUE;
416     case VFCTRL_SET_EQUALIZER:
417         r= sws_getColorspaceDetails(vf->priv->ctx, &inv_table, &srcRange, &table, &dstRange, &brightness, &contrast, &saturation);
418         if(r<0) break;
419 //printf("set %f %f %f\n", brightness/(float)(1<<16), contrast/(float)(1<<16), saturation/(float)(1<<16));
420         eq = data;
421
422         if (!strcmp(eq->item,"brightness")) {
423                 brightness = (( eq->value     <<16) + 50)/100;
424         }
425         else if (!strcmp(eq->item,"contrast")) {
426                 contrast   = (((eq->value+100)<<16) + 50)/100;
427         }
428         else if (!strcmp(eq->item,"saturation")) {
429                 saturation = (((eq->value+100)<<16) + 50)/100;
430         }
431         else
432                 break;
433
434         r= sws_setColorspaceDetails(vf->priv->ctx, inv_table, srcRange, table, dstRange, brightness, contrast, saturation);
435         if(r<0) break;
436         if(vf->priv->ctx2){
437             r= sws_setColorspaceDetails(vf->priv->ctx2, inv_table, srcRange, table, dstRange, brightness, contrast, saturation);
438             if(r<0) break;
439         }
440
441         return CONTROL_TRUE;
442     default:
443         break;
444     }
445
446     return vf_next_control(vf,request,data);
447 }
448
449 //===========================================================================//
450
451 //  supported Input formats: YV12, I420, IYUV, YUY2, UYVY, BGR32, BGR24, BGR16, BGR15, RGB32, RGB24, Y8, Y800
452
453 static int query_format(struct vf_instance_s* vf, unsigned int fmt){
454     switch(fmt){
455     case IMGFMT_YV12:
456     case IMGFMT_I420:
457     case IMGFMT_IYUV:
458     case IMGFMT_UYVY:
459     case IMGFMT_YUY2:
460     case IMGFMT_BGR32:
461     case IMGFMT_BGR24:
462     case IMGFMT_BGR16:
463     case IMGFMT_BGR15:
464     case IMGFMT_RGB32:
465     case IMGFMT_RGB24:
466     case IMGFMT_Y800:
467     case IMGFMT_Y8:
468     case IMGFMT_YVU9:
469     case IMGFMT_IF09:
470     case IMGFMT_444P:
471     case IMGFMT_422P:
472     case IMGFMT_411P:
473     case IMGFMT_BGR8:
474     case IMGFMT_RGB8:
475     case IMGFMT_BG4B:
476     case IMGFMT_RG4B:
477     {
478         unsigned int best=find_best_out(vf);
479         int flags;
480         if(!best) return 0;      // no matching out-fmt
481         flags=vf_next_query_format(vf,best);
482         if(!(flags&(VFCAP_CSP_SUPPORTED|VFCAP_CSP_SUPPORTED_BY_HW))) return 0; // huh?
483         if(fmt!=best) flags&=~VFCAP_CSP_SUPPORTED_BY_HW;
484         // do not allow scaling, if we are before the PP fliter!
485         if(!(flags&VFCAP_POSTPROC)) flags|=VFCAP_SWSCALE;
486         return flags;
487       }
488     }
489     return 0;   // nomatching in-fmt
490 }
491
492 static void uninit(struct vf_instance_s *vf){
493     if(vf->priv->ctx) sws_freeContext(vf->priv->ctx);
494     if(vf->priv->ctx2) sws_freeContext(vf->priv->ctx2);
495     if(vf->priv->palette) free(vf->priv->palette);
496     free(vf->priv);
497 }
498
499 static int open(vf_instance_t *vf, char* args){
500     vf->config=config;
501     vf->start_slice=start_slice;
502     vf->draw_slice=draw_slice;
503     vf->put_image=put_image;
504     vf->query_format=query_format;
505     vf->control= control;
506     vf->uninit=uninit;
507     if(!vf->priv) {
508     vf->priv=malloc(sizeof(struct vf_priv_s));
509     // TODO: parse args ->
510     vf->priv->ctx=NULL;
511     vf->priv->ctx2=NULL;
512     vf->priv->w=
513     vf->priv->h=-1;
514     vf->priv->v_chr_drop=0;
515     vf->priv->accurate_rnd=0;
516     vf->priv->param[0]=
517     vf->priv->param[1]=SWS_PARAM_DEFAULT;
518     vf->priv->palette=NULL;
519     } // if(!vf->priv)
520     if(args) sscanf(args, "%d:%d:%d:%lf:%lf",
521     &vf->priv->w,
522     &vf->priv->h,
523     &vf->priv->v_chr_drop,
524     &vf->priv->param[0],
525     &vf->priv->param[1]);
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 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 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 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 m_struct_t vf_opts;
642 static 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 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 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 //===========================================================================//