DTtctoframe(3dm)					      DTtctoframe(3dm)

NAME    [Toc]    [Back]

     DTtctoframe - convert DAT timecode	structure to DAT frame number.

SYNOPSIS    [Toc]    [Back]

     #include <sys/types.h>
     #include <dmedia/dataudio.h>

     unsigned long DTtctoframe(struct dttimecode* tc)

PARAMETERS    [Toc]    [Back]

     tc	  A pointer to the struct dttimecode to	be converted.

RETURNED VALUE    [Toc]    [Back]

     DTtctoframe returns the desired frame number.

DESCRIPTION    [Toc]    [Back]

     DTtctotime	converts a struct dttimecode representing a time in absolute
     time on a DAT into	the corresponding DAT frame number.  Absolute time is
     a continuously incrementing time starting from 0 at the start of the
     tape.  A struct dttimecode	is defined as follows in dataudio.h :

	      struct dttimecode	{
		  unchar hhi:4,	hlo:4;
		  unchar mhi:4,	mlo:4;
		  unchar shi:4,	slo:4;
		  unchar fhi:4,	flo:4;
	      };


     Frame numbers are much easier to compare than timecodes.

SEE ALSO    [Toc]    [Back]

     DTintro(3dm), DTaddcallback(3dm), DThmsftoframe(3dm), DTparseframe(3dm),
     DTremovecallback(3dm), DTtcvalid(3dm), datframe(4)

AUTHOR    [Toc]    [Back]

     Mark Callow


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