libvo/aspect.c

   1 /*
   2  * This file is part of MPlayer.
   3  *
   4  * MPlayer is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * MPlayer is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  17  */
  18
  19 /* Stuff for correct aspect scaling. */
  20 #include "aspect.h"
  21 #include "geometry.h"
  22 #include "video_out.h"
  23 //#ifndef ASPECT_TEST
  24 #include "mp_msg.h"
  25 #include "options.h"
  26 //#endif
  27
  28 //#define ASPECT_DEBUG
  29
  30 #if defined(ASPECT_DEBUG) || defined(ASPECT_TEST)
  31 #include <stdio.h>
  32 #endif
  33
  34 #include "video_out.h"
  35
  36 void aspect_save_orig(struct vo *vo, int orgw, int orgh)
  37 {
  38 #ifdef ASPECT_DEBUG
  39   printf("aspect_save_orig %dx%d \n",orgw,orgh);
  40 #endif
  41     vo->aspdat.orgw = orgw;
  42     vo->aspdat.orgh = orgh;
  43 }
  44
  45 void aspect_save_prescale(struct vo *vo, int prew, int preh)
  46 {
  47 #ifdef ASPECT_DEBUG
  48   printf("aspect_save_prescale %dx%d \n",prew,preh);
  49 #endif
  50     vo->aspdat.prew = prew;
  51     vo->aspdat.preh = preh;
  52 }
  53
  54 void aspect_save_screenres(struct vo *vo, int scrw, int scrh)
  55 {
  56 #ifdef ASPECT_DEBUG
  57   printf("aspect_save_screenres %dx%d \n",scrw,scrh);
  58 #endif
  59     struct MPOpts *opts = vo->opts;
  60     vo->aspdat.scrw = scrw;
  61     vo->aspdat.scrh = scrh;
  62     if (opts->force_monitor_aspect)
  63         vo->monitor_aspect = opts->force_monitor_aspect;
  64     else
  65         vo->monitor_aspect = opts->monitor_pixel_aspect * scrw / scrh;
  66 }
  67
  68 /* aspect is called with the source resolution and the
  69  * resolution, that the scaled image should fit into
  70  */
  71
  72 void aspect_fit(struct vo *vo, int *srcw, int *srch, int fitw, int fith)
  73 {
  74     struct aspect_data *aspdat = &vo->aspdat;
  75   int tmpw;
  76
  77 #ifdef ASPECT_DEBUG
  78   printf("aspect(0) fitin: %dx%d screenaspect: %.2f\n",aspdat->scrw,aspdat->scrh,
  79       monitor_aspect);
  80   printf("aspect(1) wh: %dx%d (org: %dx%d)\n",*srcw,*srch,aspdat->prew,aspdat->preh);
  81 #endif
  82     *srcw = fitw;
  83     *srch = (int)(((float)fitw / (float)aspdat->prew * (float)aspdat->preh)
  84                * ((float)aspdat->scrh / ((float)aspdat->scrw / vo->monitor_aspect)));
  85   *srch+= *srch%2; // round
  86 #ifdef ASPECT_DEBUG
  87   printf("aspect(2) wh: %dx%d (org: %dx%d)\n",*srcw,*srch,aspdat->prew,aspdat->preh);
  88 #endif
  89   if(*srch>fith || *srch<aspdat->orgh){
  90       tmpw = (int)(((float)fith / (float)aspdat->preh * (float)aspdat->prew)
  91                 * ((float)aspdat->scrw / ((float)aspdat->scrh / (1.0/vo->monitor_aspect))));
  92     tmpw+= tmpw%2; // round
  93     if(tmpw<=fitw /*&& tmpw>=aspdat->orgw*/){
  94       *srch = fith;
  95       *srcw = tmpw;
  96     }else{
  97 #ifndef ASPECT_TEST
  98       mp_tmsg(MSGT_VO,MSGL_WARN,"[ASPECT] Warning: No suitable new res found!\n");
  99 #else
 100       mp_tmsg(MSGT_VO,MSGL_WARN,"[ASPECT] Error: No new size found that fits into res!\n");
 101 #endif
 102     }
 103   }
 104   aspdat->asp=*srcw / (float)*srch;
 105 #ifdef ASPECT_DEBUG
 106   printf("aspect(3) wh: %dx%d (org: %dx%d)\n",*srcw,*srch,aspdat->prew,aspdat->preh);
 107 #endif
 108 }
 109
 110 static void get_max_dims(struct vo *vo, int *w, int *h, int zoom)
 111 {
 112     struct aspect_data *aspdat = &vo->aspdat;
 113   *w = zoom ? aspdat->scrw : aspdat->prew;
 114   *h = zoom ? aspdat->scrh : aspdat->preh;
 115   if (zoom && WinID >= 0) zoom = A_WINZOOM;
 116   if (zoom == A_WINZOOM) {
 117     *w = vo->dwidth;
 118     *h = vo->dheight;
 119   }
 120 }
 121
 122 void aspect(struct vo *vo, int *srcw, int *srch, int zoom)
 123 {
 124   int fitw;
 125   int fith;
 126   get_max_dims(vo, &fitw, &fith, zoom);
 127   if( !zoom && geometry_wh_changed ) {
 128 #ifdef ASPECT_DEBUG
 129     printf("aspect(0) no aspect forced!\n");
 130 #endif
 131     return; // the user doesn't want to fix aspect
 132   }
 133   aspect_fit(vo, srcw, srch, fitw, fith);
 134 }
 135
 136 void panscan_init(struct vo *vo)
 137 {
 138     vo->panscan_x = 0;
 139     vo->panscan_y = 0;
 140     vo->panscan_amount = 0.0f;
 141 }
 142
 143 static void panscan_calc_internal(struct vo *vo, int zoom)
 144 {
 145  int fwidth,fheight;
 146  int vo_panscan_area;
 147  int max_w, max_h;
 148  get_max_dims(vo, &max_w, &max_h, zoom);
 149     struct MPOpts *opts = vo->opts;
 150
 151     if (opts->vo_panscanrange > 0) {
 152         aspect(vo, &fwidth, &fheight, zoom);
 153         vo_panscan_area = max_h - fheight;
 154         if (!vo_panscan_area)
 155             vo_panscan_area = max_w - fwidth;
 156         vo_panscan_area *= opts->vo_panscanrange;
 157     } else
 158         vo_panscan_area = -opts->vo_panscanrange * max_h;
 159
 160     vo->panscan_amount = vo_fs || zoom == A_WINZOOM ? vo_panscan : 0;
 161     vo->panscan_x = vo_panscan_area * vo->panscan_amount * vo->aspdat.asp;
 162     vo->panscan_y = vo_panscan_area * vo->panscan_amount;
 163 }
 164
 165 void panscan_calc(struct vo *vo)
 166 {
 167     panscan_calc_internal(vo, A_ZOOM);
 168 }
 169
 170 /**
 171  * vos that set vo_dwidth and v_dheight correctly should call this to update
 172  * vo_panscan_x and vo_panscan_y
 173  */
 174 void panscan_calc_windowed(struct vo *vo)
 175 {
 176     panscan_calc_internal(vo, A_WINZOOM);
 177 }