find_sub.c

   1 /*
   2  * .SUB
   3  *
   4  * This file is part of MPlayer.
   5  *
   6  * MPlayer is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * MPlayer is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19  */
  20
  21 #include "config.h"
  22
  23 #include <stdio.h>
  24
  25 #include "libvo/video_out.h"
  26 #include "libvo/sub.h"
  27 #include "subreader.h"
  28
  29 #include "mp_msg.h"
  30 #include "help_mp.h"
  31 #include "mpcommon.h"
  32
  33 static int current_sub=0;
  34
  35 //static subtitle* subtitles=NULL;
  36 static int nosub_range_start=-1;
  37 static int nosub_range_end=-1;
  38 static const sub_data *last_sub_data = NULL;
  39
  40 extern float sub_delay;
  41 extern float  sub_fps;
  42
  43 void step_sub(sub_data *subd, float pts, int movement) {
  44     subtitle *subs;
  45     int key;
  46
  47     if (subd == NULL) return;
  48     subs = subd->subtitles;
  49     key = (pts+sub_delay) * (subd->sub_uses_time ? 100 : sub_fps);
  50
  51     /* Tell the OSD subsystem that the OSD contents will change soon */
  52     vo_osd_changed(OSDTYPE_SUBTITLE);
  53
  54     /* If we are moving forward, don't count the next (current) subtitle
  55      * if we haven't displayed it yet. Same when moving other direction.
  56      */
  57     if (movement > 0 && key < subs[current_sub].start)
  58         movement--;
  59     if (movement < 0 && key >= subs[current_sub].end)
  60         movement++;
  61
  62     /* Never move beyond first or last subtitle. */
  63     if (current_sub+movement < 0)
  64         movement = 0-current_sub;
  65     if (current_sub+movement >= subd->sub_num)
  66         movement = subd->sub_num - current_sub - 1;
  67
  68     current_sub += movement;
  69     sub_delay = subs[current_sub].start / (subd->sub_uses_time ? 100 : sub_fps) - pts;
  70 }
  71
  72 void find_sub(sub_data* subd,int key){
  73     subtitle *subs;
  74     subtitle *new_sub = NULL;
  75     int i,j;
  76
  77     if ( !subd || subd->sub_num == 0) return;
  78     subs = subd->subtitles;
  79
  80     if (last_sub_data != subd) {
  81         // Sub data changed, reset nosub range.
  82         last_sub_data = subd;
  83         nosub_range_start = -1;
  84         nosub_range_end = -1;
  85     }
  86
  87     if(vo_sub){
  88       if(key>=vo_sub->start && key<=vo_sub->end) return; // OK!
  89     } else {
  90       if(key>nosub_range_start && key<nosub_range_end) return; // OK!
  91     }
  92     // sub changed!
  93
  94     /* Tell the OSD subsystem that the OSD contents will change soon */
  95     vo_osd_changed(OSDTYPE_SUBTITLE);
  96
  97     if(key<=0){
  98       // no sub here
  99       goto update;
 100     }
 101
 102 //    printf("\r---- sub changed ----\n");
 103
 104     // check next sub.
 105     if(current_sub>=0 && current_sub+1 < subd->sub_num){
 106       if(key>subs[current_sub].end && key<subs[current_sub+1].start){
 107           // no sub
 108           nosub_range_start=subs[current_sub].end;
 109           nosub_range_end=subs[current_sub+1].start;
 110           goto update;
 111       }
 112       // next sub?
 113       ++current_sub;
 114       new_sub=&subs[current_sub];
 115       if(key>=new_sub->start && key<=new_sub->end) goto update; // OK!
 116     }
 117
 118 //    printf("\r---- sub log search... ----\n");
 119
 120     // use logarithmic search:
 121     i=0;
 122     j = subd->sub_num - 1;
 123 //    printf("Searching %d in %d..%d\n",key,subs[i].start,subs[j].end);
 124     while(j>=i){
 125         current_sub=(i+j+1)/2;
 126         new_sub=&subs[current_sub];
 127         if(key<new_sub->start) j=current_sub-1;
 128         else if(key>new_sub->end) i=current_sub+1;
 129         else goto update; // found!
 130     }
 131 //    if(key>=new_sub->start && key<=new_sub->end) return; // OK!
 132
 133     // check where are we...
 134     if(key<new_sub->start){
 135       if(current_sub<=0){
 136           // before the first sub
 137           nosub_range_start=key-1; // tricky
 138           nosub_range_end=new_sub->start;
 139 //          printf("FIRST...  key=%d  end=%d  \n",key,new_sub->start);
 140           new_sub=NULL;
 141           goto update;
 142       }
 143       --current_sub;
 144       if(key>subs[current_sub].end && key<subs[current_sub+1].start){
 145           // no sub
 146           nosub_range_start=subs[current_sub].end;
 147           nosub_range_end=subs[current_sub+1].start;
 148 //          printf("No sub... 1 \n");
 149           new_sub=NULL;
 150           goto update;
 151       }
 152       printf("HEH????  ");
 153     } else {
 154       if(key<=new_sub->end) printf("JAJJ!  "); else
 155       if(current_sub+1 >= subd->sub_num){
 156           // at the end?
 157           nosub_range_start=new_sub->end;
 158           nosub_range_end=0x7FFFFFFF; // MAXINT
 159 //          printf("END!?\n");
 160           new_sub=NULL;
 161           goto update;
 162       } else
 163       if(key>subs[current_sub].end && key<subs[current_sub+1].start){
 164           // no sub
 165           nosub_range_start=subs[current_sub].end;
 166           nosub_range_end=subs[current_sub+1].start;
 167 //          printf("No sub... 2 \n");
 168           new_sub=NULL;
 169           goto update;
 170       }
 171     }
 172
 173     mp_msg(MSGT_FIXME,MSGL_FIXME,"SUB ERROR:  %d  ?  %d --- %d  [%d]  \n",key,(int)new_sub->start,(int)new_sub->end,current_sub);
 174
 175     new_sub=NULL; // no sub here
 176 update:
 177     set_osd_subtitle(new_sub);
 178 }