mvQuery(3dm)                                                      mvQuery(3dm)



NAME
     mvQueryInt, mvQueryDouble, mvQueryPointer - query information about file
     formats


SYNOPSIS
     #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
     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
     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:

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


     MVQUERYIDCOUNT
          Request the total number of file formats supported. (int)

     MVQUERYIDS
          Request a list of the available file formats. (pointer)


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






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mvQuery(3dm)                                                      mvQuery(3dm)



     MVQUERYIDCOUNT
          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.

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







































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