libvo/aspect.c

   1 /* Stuff for correct aspect scaling. */
   2 #include "aspect.h"
   3 #include "geometry.h"
   4 #include "video_out.h"
   5 //#ifndef ASPECT_TEST
   6 #include "mp_msg.h"
   7 #include "help_mp.h"
   8 #include "options.h"
   9 //#endif
  10
  11 //#define ASPECT_DEBUG
  12
  13 #if defined(ASPECT_DEBUG) || defined(ASPECT_TEST)
  14 #include <stdio.h>
  15 #endif
  16
  17 #include "video_out.h"
  18
  19 void aspect_save_orig(struct vo *vo, int orgw, int orgh)
  20 {
  21 #ifdef ASPECT_DEBUG
  22   printf("aspect_save_orig %dx%d \n",orgw,orgh);
  23 #endif
  24     vo->aspdat.orgw = orgw;
  25     vo->aspdat.orgh = orgh;
  26 }
  27
  28 void aspect_save_prescale(struct vo *vo, int prew, int preh)
  29 {
  30 #ifdef ASPECT_DEBUG
  31   printf("aspect_save_prescale %dx%d \n",prew,preh);
  32 #endif
  33     vo->aspdat.prew = prew;
  34     vo->aspdat.preh = preh;
  35 }
  36
  37 void aspect_save_screenres(struct vo *vo, int scrw, int scrh)
  38 {
  39 #ifdef ASPECT_DEBUG
  40   printf("aspect_save_screenres %dx%d \n",scrw,scrh);
  41 #endif
  42     struct MPOpts *opts = vo->opts;
  43     vo->aspdat.scrw = scrw;
  44     vo->aspdat.scrh = scrh;
  45     if (opts->force_monitor_aspect)
  46         vo->monitor_aspect = opts->force_monitor_aspect;
  47     else
  48         vo->monitor_aspect = opts->monitor_pixel_aspect * scrw / scrh;
  49 }
  50
  51 /* aspect is called with the source resolution and the
  52  * resolution, that the scaled image should fit into
  53  */
  54
  55 void aspect_fit(struct vo *vo, int *srcw, int *srch, int fitw, int fith)
  56 {
  57     struct aspect_data *aspdat = &vo->aspdat;
  58   int tmpw;
  59
  60 #ifdef ASPECT_DEBUG
  61   printf("aspect(0) fitin: %dx%d screenaspect: %.2f\n",aspdat->scrw,aspdat->scrh,
  62       monitor_aspect);
  63   printf("aspect(1) wh: %dx%d (org: %dx%d)\n",*srcw,*srch,aspdat->prew,aspdat->preh);
  64 #endif
  65     *srcw = fitw;
  66     *srch = (int)(((float)fitw / (float)aspdat->prew * (float)aspdat->preh)
  67                * ((float)aspdat->scrh / ((float)aspdat->scrw / vo->monitor_aspect)));
  68   *srch+= *srch%2; // round
  69 #ifdef ASPECT_DEBUG
  70   printf("aspect(2) wh: %dx%d (org: %dx%d)\n",*srcw,*srch,aspdat->prew,aspdat->preh);
  71 #endif
  72   if(*srch>aspdat->scrh || *srch<aspdat->orgh){
  73       tmpw = (int)(((float)fith / (float)aspdat->preh * (float)aspdat->prew)
  74                 * ((float)aspdat->scrw / ((float)aspdat->scrh / (1.0/vo->monitor_aspect))));
  75     tmpw+= tmpw%2; // round
  76     if(tmpw<=aspdat->scrw /*&& tmpw>=aspdat->orgw*/){
  77       *srch = fith;
  78       *srcw = tmpw;
  79     }else{
  80 #ifndef ASPECT_TEST
  81       mp_msg(MSGT_VO,MSGL_WARN,MSGTR_LIBVO_ASPECT_NoSuitableNewResFound);
  82 #else
  83       mp_msg(MSGT_VO,MSGL_WARN,MSGTR_LIBVO_ASPECT_NoNewSizeFoundThatFitsIntoRes);
  84 #endif
  85     }
  86   }
  87   aspdat->asp=*srcw / (float)*srch;
  88 #ifdef ASPECT_DEBUG
  89   printf("aspect(3) wh: %dx%d (org: %dx%d)\n",*srcw,*srch,aspdat->prew,aspdat->preh);
  90 #endif
  91 }
  92
  93 void aspect(struct vo *vo, int *srcw, int *srch, int zoom){
  94   int fitw = zoom ? vo->aspdat.scrw : vo->aspdat.prew;
  95   int fith = zoom ? vo->aspdat.scrh : vo->aspdat.preh;
  96   if( !zoom && geometry_wh_changed ) {
  97 #ifdef ASPECT_DEBUG
  98     printf("aspect(0) no aspect forced!\n");
  99 #endif
 100     return; // the user doesn't want to fix aspect
 101   }
 102   aspect_fit(vo, srcw, srch, fitw, fith);
 103 }
 104
 105 void panscan_init(struct vo *vo)
 106 {
 107     vo->panscan_x = 0;
 108     vo->panscan_y = 0;
 109     vo->panscan_amount = 0.0f;
 110 }
 111
 112 void panscan_calc(struct vo *vo)
 113 {
 114  int fwidth,fheight;
 115  int vo_panscan_area;
 116     struct MPOpts *opts = vo->opts;
 117
 118     if (opts->vo_panscanrange > 0) {
 119         aspect(vo, &fwidth, &fheight, A_ZOOM);
 120         vo_panscan_area = (vo->aspdat.scrh - fheight);
 121         if (!vo_panscan_area)
 122             vo_panscan_area = vo->aspdat.scrw - fwidth;
 123         vo_panscan_area *= opts->vo_panscanrange;
 124     } else
 125         vo_panscan_area = -opts->vo_panscanrange * vo->aspdat.scrh;
 126
 127     vo->panscan_amount = vo_fs ? vo_panscan : 0;
 128     vo->panscan_x = vo_panscan_area * vo->panscan_amount * vo->aspdat.asp;
 129     vo->panscan_y = vo_panscan_area * vo->panscan_amount;
 130 }
 131