more accurate fast-forward/rewind

[vuplus_dvbapp] / lib / dvb / tstools.h

diff --git a/lib/dvb/tstools.h b/lib/dvb/tstools.h
index a8e0751..c230a34 100644 (file)
--- a/lib/dvb/tstools.h
+++ b/lib/dvb/tstools.h
@@ -56,7 +56,22 @@ public:
        
        int findPMT(int &pmt_pid, int &service_id);
        
-       int findIFrame(off_t &offset, size_t &len, int direction);
+       enum { 
+               frametypeI = 1, 
+               frametypeP = 2, 
+               frametypeB = 4, 
+               frametypeAll = frametypeI | frametypeP | frametypeB
+       };
+       /** findFrame: finds a specific frame at a given position
+       
+       findFrame will look for the specified frame type starting at the given position, moving forward
+       (when direction is >0) or backward (when direction is <0). (direction=0 is a special case and also moves
+       forward, but starts with the last frame.)
+       
+       return values are the new offset, the length of the found frame (both unaligned), and the (signed) 
+       number of frames skipped. */
+       int findFrame(off_t &offset, size_t &len, int &direction, int frame_types = frametypeI);
+       int findNextPicture(off_t &offset, size_t &len, int &distance, int frame_types = frametypeAll);
 private:
        int m_pid;
        int m_maxrange;