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