Merge branch 'master' into bug_245_record_playback_fixes

[vuplus_dvbapp] / lib / dvb / tstools.cpp

diff --git a/lib/dvb/tstools.cpp b/lib/dvb/tstools.cpp
index 06e8ba0..2e5c566 100644 (file)
--- a/lib/dvb/tstools.cpp
+++ b/lib/dvb/tstools.cpp
@@ -652,17 +652,23 @@ int eDVBTSTools::findFrame(off_t &_offset, size_t &len, int &direction, int fram
 
 int eDVBTSTools::findNextPicture(off_t &offset, size_t &len, int &distance, int frame_types)
 {
-       int nr_frames = 0;
+       int nr_frames, direction;
 //     eDebug("trying to move %d frames at %llx", distance, offset);
        
        frame_types = frametypeI; /* TODO: intelligent "allow IP frames when not crossing an I-Frame */
 
-       int direction = distance > 0 ? 0 : -1;
-       distance = abs(distance);
-       
        off_t new_offset = offset;
        size_t new_len = len;
-       
+       int first = 1;
+
+       if (distance > 0) {
+               direction = 0;
+                nr_frames = 0;
+        } else {
+               direction = -1;
+                nr_frames = -1;
+               distance = -distance+1;
+        }      
        while (distance > 0)
        {
                int dir = direction;
@@ -676,11 +682,18 @@ int eDVBTSTools::findNextPicture(off_t &offset, size_t &len, int &distance, int
                
 //             eDebug("we moved %d, %d to go frames (now at %llx)", dir, distance, new_offset);
 
-               if (distance >= 0)
+               if (distance >= 0 || direction == 0)
                {
+                       first = 0;
                        offset = new_offset;
                        len = new_len;
                        nr_frames += abs(dir);
+               } 
+               else if (first) {
+                       first = 0;
+                       offset = new_offset;
+                       len = new_len;
+                       nr_frames += abs(dir) + distance; // never jump forward during rewind
                }
        }