find_sub() moved out from mplayer.c

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@585 b3059339-0415-0410-9bf9-f77b7e298cf2

1 files changed, 101 insertions, 0 deletions

diff --git a/find_sub.c b/find_sub.c
new file mode 100644
index 0000000000..9306c5cb51
--- /dev/null
+++ b/find_sub.c
@@ -0,0 +1,101 @@
+//**************************************************************************//
+//             .SUB 
+//**************************************************************************//
+
+#include <stdio.h>
+
+#include "libvo/video_out.h"
+#include "subreader.h"
+#include "libvo/sub.h"
+
+static int current_sub=0;
+
+//static subtitle* subtitles=NULL;
+static int nosub_range_start=-1;
+static int nosub_range_end=-1;
+
+void find_sub(subtitle* subtitles,int key){
+    int i,j;
+    if(vo_sub){
+      if(key>=vo_sub->start && key<=vo_sub->end) return; // OK!
+    } else {
+      if(key>nosub_range_start && key<nosub_range_end) return; // OK!
+    }
+    // sub changed!
+    
+//    printf("\r---- sub changed ----\n");
+    
+    // check next sub.
+    if(current_sub>=0 && current_sub+1<sub_num){
+      if(key>subtitles[current_sub].end && key<subtitles[current_sub+1].start){
+          // no sub
+          nosub_range_start=subtitles[current_sub].end;
+          nosub_range_end=subtitles[current_sub+1].start;
+          vo_sub=NULL;
+          return;
+      }
+      // next sub?
+      ++current_sub;
+      vo_sub=&subtitles[current_sub];
+      if(key>=vo_sub->start && key<=vo_sub->end) return; // OK!
+    }
+
+//    printf("\r---- sub log search... ----\n");
+    
+    // use logarithmic search:
+    i=0;j=sub_num-1;
+//    printf("Searching %d in %d..%d\n",key,subtitles[i].start,subtitles[j].end);
+    while(j>=i){
+        current_sub=(i+j+1)/2;
+        vo_sub=&subtitles[current_sub];
+        if(key<vo_sub->start) j=current_sub-1;
+        else if(key>vo_sub->end) i=current_sub+1;
+        else return; // found!
+    }
+//    if(key>=vo_sub->start && key<=vo_sub->end) return; // OK!
+    
+    // check where are we...
+    if(key<vo_sub->start){
+      if(current_sub<=0){
+          // before the first sub
+          nosub_range_start=key-1; // tricky
+          nosub_range_end=vo_sub->start;
+//          printf("FIRST...  key=%d  end=%d  \n",key,vo_sub->start);
+          vo_sub=NULL;
+          return;
+      }
+      --current_sub;
+      if(key>subtitles[current_sub].end && key<subtitles[current_sub+1].start){
+          // no sub
+          nosub_range_start=subtitles[current_sub].end;
+          nosub_range_end=subtitles[current_sub+1].start;
+//          printf("No sub... 1 \n");
+          vo_sub=NULL;
+          return;
+      }
+      printf("HEH????  ");
+    } else {
+      if(key<=vo_sub->end) printf("JAJJ!  "); else
+      if(current_sub+1>=sub_num){
+          // at the end?
+          nosub_range_start=vo_sub->end;
+          nosub_range_end=0x7FFFFFFF; // MAXINT
+//          printf("END!?\n");
+          vo_sub=NULL;
+          return;
+      } else
+      if(key>subtitles[current_sub].end && key<subtitles[current_sub+1].start){
+          // no sub
+          nosub_range_start=subtitles[current_sub].end;
+          nosub_range_end=subtitles[current_sub+1].start;
+//          printf("No sub... 2 \n");
+          vo_sub=NULL;
+          return;
+      }
+    }
+    
+    printf("SUB ERROR:  %d  ?  %d --- %d  [%d]  \n",key,(int)vo_sub->start,(int)vo_sub->end,current_sub);
+
+    vo_sub=NULL; // no sub here
+}
+