.TH MPEG 2.SH NAMEmpeg \- interface to the mpeg device driver.SH SYNOPSIS.EXinclude "draw.m";include "mpeg.m";mpeg:= load Mpeg Mpeg->PATH; play:     fn(d:       ref Display,               w:       ref Image,               dopaint: int,               r:       Rect,               file:    string,               notify:  chan of string): string;ctl:      fn(msg: string): int;keycolor: fn(d: ref Display): ref Image;.EE.SH DESCRIPTION.B Mpegprovides a primitive interface to the.IR mpeg (3)device..PP.B Playplays the specified MPEG.I filein rectangle.I rwithin window.I won display.IR d .The.I dopaintflag specifies whether, before playing the movie, to paint the rectangle with the chroma key colour of the device..PP.I Notifyis a channel upon which to receive errors and status. If.I notifyis.BR nil ,.B playruns synchronously, returning the empty string ("") when the movie completes, or a description of any error.If.I notifyis not.BR nil ,.B playspawns an asynchronous process to play the movie and returns the empty string immediately; the process returns the status on the.I notifychannel when the movie completes..PP.B Ctlwrites.IR msg ,the string given as an argument, to the MPEG control interface.BR /dev/mpegctl ..PP.B Keycoloruses the.B Display.I dto create a single-pixel, replicated off screen.B Imageof colour.B Chroma.RB ( 16r05 )..SH FILES.B /dev/mpeg.br.B /dev/mpegctl.SH SOURCE.B /appl/lib/mpeg.b