find_sub.c

   1 //**************************************************************************//
   2 //             .SUB
   3 //**************************************************************************//
   4
   5 #include "config.h"
   6
   7 #include <stdio.h>
   8
   9 #include "libvo/video_out.h"
  10 #include "libvo/sub.h"
  11 #include "subreader.h"
  12
  13 #include "mp_msg.h"
  14 #include "help_mp.h"
  15 #include "mpcommon.h"
  16
  17 static int current_sub=0;
  18
  19 //static subtitle* subtitles=NULL;
  20 static int nosub_range_start=-1;
  21 static int nosub_range_end=-1;
  22 static const sub_data *last_sub_data = NULL;
  23
  24 extern float sub_delay;
  25 extern float  sub_fps;
  26
  27 void step_sub(sub_data *subd, float pts, int movement) {
  28     subtitle *subs;
  29     int key;
  30
  31     if (subd == NULL) return;
  32     subs = subd->subtitles;
  33     key = (pts+sub_delay) * (subd->sub_uses_time ? 100 : sub_fps);
  34
  35     /* Tell the OSD subsystem that the OSD contents will change soon */
  36     vo_osd_changed(OSDTYPE_SUBTITLE);
  37
  38     /* If we are moving forward, don't count the next (current) subtitle
  39      * if we haven't displayed it yet. Same when moving other direction.
  40      */
  41     if (movement > 0 && key < subs[current_sub].start)
  42         movement--;
  43     if (movement < 0 && key >= subs[current_sub].end)
  44         movement++;
  45
  46     /* Never move beyond first or last subtitle. */
  47     if (current_sub+movement < 0)
  48         movement = 0-current_sub;
  49     if (current_sub+movement >= subd->sub_num)
  50         movement = subd->sub_num - current_sub - 1;
  51
  52     current_sub += movement;
  53     sub_delay = subs[current_sub].start / (subd->sub_uses_time ? 100 : sub_fps) - pts;
  54 }
  55
  56 void find_sub(sub_data* subd,int key){
  57     subtitle *subs;
  58     subtitle *new_sub = NULL;
  59     int i,j;
  60
  61     if ( !subd || subd->sub_num == 0) return;
  62     subs = subd->subtitles;
  63
  64     if (last_sub_data != subd) {
  65         // Sub data changed, reset nosub range.
  66         last_sub_data = subd;
  67         nosub_range_start = -1;
  68         nosub_range_end = -1;
  69     }
  70
  71     if(vo_sub){
  72       if(key>=vo_sub->start && key<=vo_sub->end) return; // OK!
  73     } else {
  74       if(key>nosub_range_start && key<nosub_range_end) return; // OK!
  75     }
  76     // sub changed!
  77
  78     /* Tell the OSD subsystem that the OSD contents will change soon */
  79     vo_osd_changed(OSDTYPE_SUBTITLE);
  80
  81     if(key<=0){
  82       // no sub here
  83       goto update;
  84     }
  85
  86 //    printf("\r---- sub changed ----\n");
  87
  88     // check next sub.
  89     if(current_sub>=0 && current_sub+1 < subd->sub_num){
  90       if(key>subs[current_sub].end && key<subs[current_sub+1].start){
  91           // no sub
  92           nosub_range_start=subs[current_sub].end;
  93           nosub_range_end=subs[current_sub+1].start;
  94           goto update;
  95       }
  96       // next sub?
  97       ++current_sub;
  98       new_sub=&subs[current_sub];
  99       if(key>=new_sub->start && key<=new_sub->end) goto update; // OK!
 100     }
 101
 102 //    printf("\r---- sub log search... ----\n");
 103
 104     // use logarithmic search:
 105     i=0;
 106     j = subd->sub_num - 1;
 107 //    printf("Searching %d in %d..%d\n",key,subs[i].start,subs[j].end);
 108     while(j>=i){
 109         current_sub=(i+j+1)/2;
 110         new_sub=&subs[current_sub];
 111         if(key<new_sub->start) j=current_sub-1;
 112         else if(key>new_sub->end) i=current_sub+1;
 113         else goto update; // found!
 114     }
 115 //    if(key>=new_sub->start && key<=new_sub->end) return; // OK!
 116
 117     // check where are we...
 118     if(key<new_sub->start){
 119       if(current_sub<=0){
 120           // before the first sub
 121           nosub_range_start=key-1; // tricky
 122           nosub_range_end=new_sub->start;
 123 //          printf("FIRST...  key=%d  end=%d  \n",key,new_sub->start);
 124           new_sub=NULL;
 125           goto update;
 126       }
 127       --current_sub;
 128       if(key>subs[current_sub].end && key<subs[current_sub+1].start){
 129           // no sub
 130           nosub_range_start=subs[current_sub].end;
 131           nosub_range_end=subs[current_sub+1].start;
 132 //          printf("No sub... 1 \n");
 133           new_sub=NULL;
 134           goto update;
 135       }
 136       printf("HEH????  ");
 137     } else {
 138       if(key<=new_sub->end) printf("JAJJ!  "); else
 139       if(current_sub+1 >= subd->sub_num){
 140           // at the end?
 141           nosub_range_start=new_sub->end;
 142           nosub_range_end=0x7FFFFFFF; // MAXINT
 143 //          printf("END!?\n");
 144           new_sub=NULL;
 145           goto update;
 146       } else
 147       if(key>subs[current_sub].end && key<subs[current_sub+1].start){
 148           // no sub
 149           nosub_range_start=subs[current_sub].end;
 150           nosub_range_end=subs[current_sub+1].start;
 151 //          printf("No sub... 2 \n");
 152           new_sub=NULL;
 153           goto update;
 154       }
 155     }
 156
 157     mp_msg(MSGT_FIXME,MSGL_FIXME,"SUB ERROR:  %d  ?  %d --- %d  [%d]  \n",key,(int)new_sub->start,(int)new_sub->end,current_sub);
 158
 159     new_sub=NULL; // no sub here
 160 update:
 161     set_osd_subtitle(new_sub);
 162 }