MPEG(2)MPEG(2)NAMEmpeg - interface to the mpeg device driver
SYNOPSIS
include "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;
DESCRIPTION
Mpeg provides a primitive interface to the mpeg(3) device.
Play plays the specified MPEG file in rectangle r within window w on
display d. The dopaint flag specifies whether, before playing the
movie, to paint the rectangle with the chroma key colour of the device.
Notify is a channel upon which to receive errors and status. If notify
is nil, play runs synchronously, returning the empty string ("") when
the movie completes, or a description of any error. If notify is not
nil, play spawns an asynchronous process to play the movie and returns
the empty string immediately; the process returns the status on the
notify channel when the movie completes.
Ctl writes msg, the string given as an argument, to the MPEG control
interface /dev/mpegctl.
Keycolor uses the Display d to create a single-pixel, replicated off
screen Image of colour Chroma (16r05).
FILES
/dev/mpeg
/dev/mpegctl
SOURCE
/appl/lib/mpeg.b
MPEG(2)
