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 monitor_aspect=4.0/3.0;
  23 float monitor_pixel_aspect=0;
  24 extern float movie_aspect;
  25
  26 static struct {
  27   int orgw; // real width
  28   int orgh; // real height
  29   int prew; // prescaled width
  30   int preh; // prescaled height
  31   int scrw; // horizontal resolution
  32   int scrh; // vertical resolution
  33   float asp;
  34 } aspdat;
  35
  36 void aspect_save_orig(int orgw, int orgh){
  37 #ifdef ASPECT_DEBUG
  38   printf("aspect_save_orig %dx%d \n",orgw,orgh);
  39 #endif
  40   aspdat.orgw = orgw;
  41   aspdat.orgh = orgh;
  42 }
  43
  44 void aspect_save_prescale(int prew, int preh){
  45 #ifdef ASPECT_DEBUG
  46   printf("aspect_save_prescale %dx%d \n",prew,preh);
  47 #endif
  48   aspdat.prew = prew;
  49   aspdat.preh = preh;
  50 }
  51
  52 void aspect_save_screenres(int scrw, int scrh){
  53 #ifdef ASPECT_DEBUG
  54   printf("aspect_save_screenres %dx%d \n",scrw,scrh);
  55 #endif
  56   aspdat.scrw = scrw;
  57   aspdat.scrh = scrh;
  58   if (monitor_pixel_aspect)
  59     monitor_aspect = monitor_pixel_aspect * scrw / scrh;
  60 }
  61
  62 /* aspect is called with the source resolution and the
  63  * resolution, that the scaled image should fit into
  64  */
  65
  66 void aspect(int *srcw, int *srch, int zoom){
  67   int tmpw;
  68
  69   if( !zoom && geometry_wh_changed ) {
  70 #ifdef ASPECT_DEBUG
  71     printf("aspect(0) no aspect forced!\n");
  72 #endif
  73     return; // the user doesn't want to fix aspect
  74   }
  75
  76 #ifdef ASPECT_DEBUG
  77   printf("aspect(0) fitin: %dx%d zoom: %d screenaspect: %.2f\n",aspdat.scrw,aspdat.scrh,
  78       zoom,monitor_aspect);
  79   printf("aspect(1) wh: %dx%d (org: %dx%d)\n",*srcw,*srch,aspdat.prew,aspdat.preh);
  80 #endif
  81   if(zoom){
  82     *srcw = aspdat.scrw;
  83     *srch = (int)(((float)aspdat.scrw / (float)aspdat.prew * (float)aspdat.preh)
  84                * ((float)aspdat.scrh / ((float)aspdat.scrw / monitor_aspect)));
  85   }else{
  86     *srcw = aspdat.prew;
  87     *srch = (int)((float)aspdat.preh
  88                * ((float)aspdat.scrh / ((float)aspdat.scrw / monitor_aspect)));
  89   }
  90   *srch+= *srch%2; // round
  91 #ifdef ASPECT_DEBUG
  92   printf("aspect(2) wh: %dx%d (org: %dx%d)\n",*srcw,*srch,aspdat.prew,aspdat.preh);
  93 #endif
  94   if(*srch>aspdat.scrh || *srch<aspdat.orgh){
  95     if(zoom)
  96       tmpw = (int)(((float)aspdat.scrh / (float)aspdat.preh * (float)aspdat.prew)
  97                 * ((float)aspdat.scrw / ((float)aspdat.scrh / (1.0/monitor_aspect))));
  98     else
  99       tmpw = (int)((float)aspdat.prew
 100                 * ((float)aspdat.scrw / ((float)aspdat.scrh / (1.0/monitor_aspect))));
 101     tmpw+= tmpw%2; // round
 102     if(tmpw<=aspdat.scrw /*&& tmpw>=aspdat.orgw*/){
 103       *srch = zoom?aspdat.scrh:aspdat.preh;
 104       *srcw = tmpw;
 105     }else{
 106 #ifndef ASPECT_TEST
 107       mp_msg(MSGT_VO,MSGL_WARN,MSGTR_LIBVO_ASPECT_NoSuitableNewResFound);
 108 #else
 109       mp_msg(MSGT_VO,MSGL_WARN,MSGTR_LIBVO_ASPECT_NoNewSizeFoundThatFitsIntoRes);
 110 #endif
 111     }
 112   }
 113   aspdat.asp=*srcw / (float)*srch;
 114 #ifdef ASPECT_DEBUG
 115   printf("aspect(3) wh: %dx%d (org: %dx%d)\n",*srcw,*srch,aspdat.prew,aspdat.preh);
 116 #endif
 117 }
 118
 119 void panscan_init( void )
 120 {
 121  vo_panscan_x=0;
 122  vo_panscan_y=0;
 123  vo_panscan_amount=0.0f;
 124 }
 125
 126 void panscan_calc( void )
 127 {
 128  int fwidth,fheight;
 129  int vo_panscan_area;
 130
 131  if (vo_panscanrange > 0) {
 132  aspect(&fwidth,&fheight,A_ZOOM);
 133  vo_panscan_area = (aspdat.scrh-fheight);
 134    vo_panscan_area *= vo_panscanrange;
 135  } else
 136    vo_panscan_area = -vo_panscanrange * aspdat.scrh;
 137
 138  vo_panscan_amount = vo_fs ? vo_panscan : 0;
 139  vo_panscan_x = vo_panscan_area * vo_panscan_amount * aspdat.asp;
 140  vo_panscan_y = vo_panscan_area * vo_panscan_amount;
 141 }
 142