mvQuery(3dm)							  mvQuery(3dm)

NAME    [Toc]    [Back]

     mvQueryInt, mvQueryDouble,	mvQueryPointer - query information about file
     formats

SYNOPSIS    [Toc]    [Back]

     #include <dmedia/moviefile.h>


     DMstatus mvQueryInt( int querytype, int arg1, int arg2, int arg3,
			  int *returnValue )

     DMstatus mvQueryDouble( int querytype, int	arg1, int arg2,	int arg3,
			  double *returnValue )

     DMstatus mvQueryPointer( int querytype, int arg1, int arg2, int arg3,
			   void	*returnValue )

PARAMETER    [Toc]    [Back]

     querytype	    is an integer value	token representing the type of query
		    being made.

     arg1,...arg4   are	integer	value tokens representing the query selectors
		    and/or subtypes.  The number of meaningful arguments to
		    the	mvQuery	routines varies	with the querytype.

DESCRIPTION    [Toc]    [Back]

     mvQuery() and its associated routines are designed	to allow an
     application to query the movie file library for information about its
     supported features.

     Possible querytype	values (defined	in <dmedia/moviefile.h>), and their
     appropriate selectors and subtypes:

     MV_QUERYTYPE_FILEFMT Queries the supported	file formats. arg1 may be the
     following:


     MV_QUERY_ID_COUNT    [Toc]    [Back]
	  Request the total number of file formats supported. (int)

     MV_QUERY_IDS    [Toc]    [Back]
	  Request a list of the	available file formats.	(pointer)


     MV_QUERYTYPE_COMPRESSION Queries the supported compression	formats. arg1
     may be the	following:






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mvQuery(3dm)							  mvQuery(3dm)



     MV_QUERY_ID_COUNT    [Toc]    [Back]
	  Request the total number of compression formats supported by a
	  particular file format.  arg2	must also be specified.	It must
	  specify a valid file format. Vaild values for	arg2 can be retrieved
	  with a file format query.

     MV_QUERY_IDS    [Toc]    [Back]
	  Request a list of the	compression formats supported by a particular
	  file format.	arg2 must also be specified. It	must specify a valid
	  file format. Vaild values for	arg2 can be retrieved with a file
	  format query.

SEE ALSO    [Toc]    [Back]

     mvCreateMovie(3dm), mvAddTrack(3dm), mvSetMovieDefaults(3dm), afQuery(3a)


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