pgem_play is shared library loaded into VxWorks, which provides a single callable function:
file_name is a pointer to a string containing the path name of the binary file produced previously by pgem_bin. It is assumed that the target and host system will share a common NFS volume or that some means exists to put the output of pgem_bin in a file system where the target system can see it.
rep_cnt is the repeat count (loop count) indicating how many times to loop through the FIFO's contents. The special value of 0xFFFFFFFF means loop forever.