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_fit(int *srcw, int *srch, int fitw, int fith){
  70   int tmpw;
  71
  72 #ifdef ASPECT_DEBUG
  73   printf("aspect(0) fitin: %dx%d screenaspect: %.2f\n",aspdat.scrw,aspdat.scrh,
  74       monitor_aspect);
  75   printf("aspect(1) wh: %dx%d (org: %dx%d)\n",*srcw,*srch,aspdat.prew,aspdat.preh);
  76 #endif
  77     *srcw = fitw;
  78     *srch = (int)(((float)fitw / (float)aspdat.prew * (float)aspdat.preh)
  79                * ((float)aspdat.scrh / ((float)aspdat.scrw / monitor_aspect)));
  80   *srch+= *srch%2; // round
  81 #ifdef ASPECT_DEBUG
  82   printf("aspect(2) wh: %dx%d (org: %dx%d)\n",*srcw,*srch,aspdat.prew,aspdat.preh);
  83 #endif
  84   if(*srch>aspdat.scrh || *srch<aspdat.orgh){
  85       tmpw = (int)(((float)fith / (float)aspdat.preh * (float)aspdat.prew)
  86                 * ((float)aspdat.scrw / ((float)aspdat.scrh / (1.0/monitor_aspect))));
  87     tmpw+= tmpw%2; // round
  88     if(tmpw<=aspdat.scrw /*&& tmpw>=aspdat.orgw*/){
  89       *srch = fith;
  90       *srcw = tmpw;
  91     }else{
  92 #ifndef ASPECT_TEST
  93       mp_msg(MSGT_VO,MSGL_WARN,MSGTR_LIBVO_ASPECT_NoSuitableNewResFound);
  94 #else
  95       mp_msg(MSGT_VO,MSGL_WARN,MSGTR_LIBVO_ASPECT_NoNewSizeFoundThatFitsIntoRes);
  96 #endif
  97     }
  98   }
  99   aspdat.asp=*srcw / (float)*srch;
 100 #ifdef ASPECT_DEBUG
 101   printf("aspect(3) wh: %dx%d (org: %dx%d)\n",*srcw,*srch,aspdat.prew,aspdat.preh);
 102 #endif
 103 }
 104
 105 void aspect(int *srcw, int *srch, int zoom){
 106   int fitw = zoom ? aspdat.scrw : aspdat.prew;
 107   int fith = zoom ? aspdat.scrh : aspdat.preh;
 108   if( !zoom && geometry_wh_changed ) {
 109 #ifdef ASPECT_DEBUG
 110     printf("aspect(0) no aspect forced!\n");
 111 #endif
 112     return; // the user doesn't want to fix aspect
 113   }
 114   aspect_fit(srcw, srch, fitw, fith);
 115 }
 116
 117 void panscan_init( void )
 118 {
 119  vo_panscan_x=0;
 120  vo_panscan_y=0;
 121  vo_panscan_amount=0.0f;
 122 }
 123
 124 void panscan_calc( void )
 125 {
 126  int fwidth,fheight;
 127  int vo_panscan_area;
 128
 129  if (vo_panscanrange > 0) {
 130    aspect(&fwidth,&fheight,A_ZOOM);
 131    vo_panscan_area = (aspdat.scrh-fheight);
 132    if (!vo_panscan_area)
 133      vo_panscan_area = aspdat.scrw - fwidth;
 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