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 "mpcommon.h"
  31
  32 static int current_sub=0;
  33
  34 //static subtitle* subtitles=NULL;
  35 static int nosub_range_start=-1;
  36 static int nosub_range_end=-1;
  37 static const sub_data *last_sub_data = NULL;
  38
  39 extern float sub_delay;
  40 extern float  sub_fps;
  41
  42 void step_sub(sub_data *subd, float pts, int movement) {
  43     subtitle *subs;
  44     int key;
  45
  46     if (subd == NULL) return;
  47     subs = subd->subtitles;
  48     key = (pts+sub_delay) * (subd->sub_uses_time ? 100 : sub_fps);
  49
  50     /* Tell the OSD subsystem that the OSD contents will change soon */
  51     vo_osd_changed(OSDTYPE_SUBTITLE);
  52
  53     /* If we are moving forward, don't count the next (current) subtitle
  54      * if we haven't displayed it yet. Same when moving other direction.
  55      */
  56     if (movement > 0 && key < subs[current_sub].start)
  57         movement--;
  58     if (movement < 0 && key >= subs[current_sub].end)
  59         movement++;
  60
  61     /* Never move beyond first or last subtitle. */
  62     if (current_sub+movement < 0)
  63         movement = 0-current_sub;
  64     if (current_sub+movement >= subd->sub_num)
  65         movement = subd->sub_num - current_sub - 1;
  66
  67     current_sub += movement;
  68     sub_delay = subs[current_sub].start / (subd->sub_uses_time ? 100 : sub_fps) - pts;
  69 }
  70
  71 void find_sub(struct MPContext *mpctx, sub_data* subd,int key){
  72     subtitle *subs;
  73     subtitle *new_sub = NULL;
  74     int i,j;
  75
  76     if ( !subd || subd->sub_num == 0) return;
  77     subs = subd->subtitles;
  78
  79     if (last_sub_data != subd) {
  80         // Sub data changed, reset nosub range.
  81         last_sub_data = subd;
  82         nosub_range_start = -1;
  83         nosub_range_end = -1;
  84     }
  85
  86     if(vo_sub){
  87       if(key>=vo_sub->start && key<=vo_sub->end) return; // OK!
  88     } else {
  89       if(key>nosub_range_start && key<nosub_range_end) return; // OK!
  90     }
  91     // sub changed!
  92
  93     /* Tell the OSD subsystem that the OSD contents will change soon */
  94     vo_osd_changed(OSDTYPE_SUBTITLE);
  95
  96     if(key<=0){
  97       // no sub here
  98       goto update;
  99     }
 100
 101 //    printf("\r---- sub changed ----\n");
 102
 103     // check next sub.
 104     if(current_sub>=0 && current_sub+1 < subd->sub_num){
 105       if(key>subs[current_sub].end && key<subs[current_sub+1].start){
 106           // no sub
 107           nosub_range_start=subs[current_sub].end;
 108           nosub_range_end=subs[current_sub+1].start;
 109           goto update;
 110       }
 111       // next sub?
 112       ++current_sub;
 113       new_sub=&subs[current_sub];
 114       if(key>=new_sub->start && key<=new_sub->end) goto update; // OK!
 115     }
 116
 117 //    printf("\r---- sub log search... ----\n");
 118
 119     // use logarithmic search:
 120     i=0;
 121     j = subd->sub_num - 1;
 122 //    printf("Searching %d in %d..%d\n",key,subs[i].start,subs[j].end);
 123     while(j>=i){
 124         current_sub=(i+j+1)/2;
 125         new_sub=&subs[current_sub];
 126         if(key<new_sub->start) j=current_sub-1;
 127         else if(key>new_sub->end) i=current_sub+1;
 128         else goto update; // found!
 129     }
 130 //    if(key>=new_sub->start && key<=new_sub->end) return; // OK!
 131
 132     // check where are we...
 133     if(key<new_sub->start){
 134       if(current_sub<=0){
 135           // before the first sub
 136           nosub_range_start=key-1; // tricky
 137           nosub_range_end=new_sub->start;
 138 //          printf("FIRST...  key=%d  end=%d  \n",key,new_sub->start);
 139           new_sub=NULL;
 140           goto update;
 141       }
 142       --current_sub;
 143       if(key>subs[current_sub].end && key<subs[current_sub+1].start){
 144           // no sub
 145           nosub_range_start=subs[current_sub].end;
 146           nosub_range_end=subs[current_sub+1].start;
 147 //          printf("No sub... 1 \n");
 148           new_sub=NULL;
 149           goto update;
 150       }
 151       printf("HEH????  ");
 152     } else {
 153       if(key<=new_sub->end) printf("JAJJ!  "); else
 154       if(current_sub+1 >= subd->sub_num){
 155           // at the end?
 156           nosub_range_start=new_sub->end;
 157           nosub_range_end=0x7FFFFFFF; // MAXINT
 158 //          printf("END!?\n");
 159           new_sub=NULL;
 160           goto update;
 161       } else
 162       if(key>subs[current_sub].end && key<subs[current_sub+1].start){
 163           // no sub
 164           nosub_range_start=subs[current_sub].end;
 165           nosub_range_end=subs[current_sub+1].start;
 166 //          printf("No sub... 2 \n");
 167           new_sub=NULL;
 168           goto update;
 169       }
 170     }
 171
 172     mp_msg(MSGT_FIXME,MSGL_FIXME,"SUB ERROR:  %d  ?  %d --- %d  [%d]  \n",key,(int)new_sub->start,(int)new_sub->end,current_sub);
 173
 174     new_sub=NULL; // no sub here
 175 update:
 176     set_osd_subtitle(mpctx, new_sub);
 177 }