libvo/aspect.c

   1 /* Stuff for correct aspect scaling. */
   2 #include "aspect.h"
   3 #include "geometry.h"
   4 //#ifndef ASPECT_TEST
   5 #include "mp_msg.h"
   6 #include "help_mp.h"
   7 //#endif
   8
   9 //#define ASPECT_DEBUG
  10
  11 #if defined(ASPECT_DEBUG) || defined(ASPECT_TEST)
  12 #include <stdio.h>
  13 #endif
  14
  15 int vo_panscan_x = 0;
  16 int vo_panscan_y = 0;
  17 float vo_panscan_amount = 0;
  18 float vo_panscanrange = 1.0;
  19
  20 #include "video_out.h"
  21
  22 float force_monitor_aspect=0;
  23 float monitor_aspect=0;
  24 float monitor_pixel_aspect=1;
  25 extern float movie_aspect;
  26
  27 static struct {
  28   int orgw; // real width
  29   int orgh; // real height
  30   int prew; // prescaled width
  31   int preh; // prescaled height
  32   int scrw; // horizontal resolution
  33   int scrh; // vertical resolution
  34   float asp;
  35 } aspdat;
  36
  37 void aspect_save_orig(int orgw, int orgh){
  38 #ifdef ASPECT_DEBUG
  39   printf("aspect_save_orig %dx%d \n",orgw,orgh);
  40 #endif
  41   aspdat.orgw = orgw;
  42   aspdat.orgh = orgh;
  43 }
  44
  45 void aspect_save_prescale(int prew, int preh){
  46 #ifdef ASPECT_DEBUG
  47   printf("aspect_save_prescale %dx%d \n",prew,preh);
  48 #endif
  49   aspdat.prew = prew;
  50   aspdat.preh = preh;
  51 }
  52
  53 void aspect_save_screenres(int scrw, int scrh){
  54 #ifdef ASPECT_DEBUG
  55   printf("aspect_save_screenres %dx%d \n",scrw,scrh);
  56 #endif
  57   aspdat.scrw = scrw;
  58   aspdat.scrh = scrh;
  59   if (force_monitor_aspect)
  60     monitor_aspect = force_monitor_aspect;
  61   else
  62     monitor_aspect = monitor_pixel_aspect * scrw / scrh;
  63 }
  64
  65 /* aspect is called with the source resolution and the
  66  * resolution, that the scaled image should fit into
  67  */
  68
  69 void aspect(int *srcw, int *srch, int zoom){
  70   int tmpw;
  71
  72   if( !zoom && geometry_wh_changed ) {
  73 #ifdef ASPECT_DEBUG
  74     printf("aspect(0) no aspect forced!\n");
  75 #endif
  76     return; // the user doesn't want to fix aspect
  77   }
  78
  79 #ifdef ASPECT_DEBUG
  80   printf("aspect(0) fitin: %dx%d zoom: %d screenaspect: %.2f\n",aspdat.scrw,aspdat.scrh,
  81       zoom,monitor_aspect);
  82   printf("aspect(1) wh: %dx%d (org: %dx%d)\n",*srcw,*srch,aspdat.prew,aspdat.preh);
  83 #endif
  84   if(zoom){
  85     *srcw = aspdat.scrw;
  86     *srch = (int)(((float)aspdat.scrw / (float)aspdat.prew * (float)aspdat.preh)
  87                * ((float)aspdat.scrh / ((float)aspdat.scrw / monitor_aspect)));
  88   }else{
  89     *srcw = aspdat.prew;
  90     *srch = (int)((float)aspdat.preh
  91                * ((float)aspdat.scrh / ((float)aspdat.scrw / monitor_aspect)));
  92   }
  93   *srch+= *srch%2; // round
  94 #ifdef ASPECT_DEBUG
  95   printf("aspect(2) wh: %dx%d (org: %dx%d)\n",*srcw,*srch,aspdat.prew,aspdat.preh);
  96 #endif
  97   if(*srch>aspdat.scrh || *srch<aspdat.orgh){
  98     if(zoom)
  99       tmpw = (int)(((float)aspdat.scrh / (float)aspdat.preh * (float)aspdat.prew)
 100                 * ((float)aspdat.scrw / ((float)aspdat.scrh / (1.0/monitor_aspect))));
 101     else
 102       tmpw = (int)((float)aspdat.prew
 103                 * ((float)aspdat.scrw / ((float)aspdat.scrh / (1.0/monitor_aspect))));
 104     tmpw+= tmpw%2; // round
 105     if(tmpw<=aspdat.scrw /*&& tmpw>=aspdat.orgw*/){
 106       *srch = zoom?aspdat.scrh:aspdat.preh;
 107       *srcw = tmpw;
 108     }else{
 109 #ifndef ASPECT_TEST
 110       mp_msg(MSGT_VO,MSGL_WARN,MSGTR_LIBVO_ASPECT_NoSuitableNewResFound);
 111 #else
 112       mp_msg(MSGT_VO,MSGL_WARN,MSGTR_LIBVO_ASPECT_NoNewSizeFoundThatFitsIntoRes);
 113 #endif
 114     }
 115   }
 116   aspdat.asp=*srcw / (float)*srch;
 117 #ifdef ASPECT_DEBUG
 118   printf("aspect(3) wh: %dx%d (org: %dx%d)\n",*srcw,*srch,aspdat.prew,aspdat.preh);
 119 #endif
 120 }
 121
 122 void panscan_init( void )
 123 {
 124  vo_panscan_x=0;
 125  vo_panscan_y=0;
 126  vo_panscan_amount=0.0f;
 127 }
 128
 129 void panscan_calc( void )
 130 {
 131  int fwidth,fheight;
 132  int vo_panscan_area;
 133
 134  if (vo_panscanrange > 0) {
 135  aspect(&fwidth,&fheight,A_ZOOM);
 136  vo_panscan_area = (aspdat.scrh-fheight);
 137    vo_panscan_area *= vo_panscanrange;
 138  } else
 139    vo_panscan_area = -vo_panscanrange * aspdat.scrh;
 140
 141  vo_panscan_amount = vo_fs ? vo_panscan : 0;
 142  vo_panscan_x = vo_panscan_area * vo_panscan_amount * aspdat.asp;
 143  vo_panscan_y = vo_panscan_area * vo_panscan_amount;
 144 }
 145