20060303a

1 files changed, 148 insertions, 0 deletions

diff --git a/appl/lib/mpeg.b b/appl/lib/mpeg.b
new file mode 100644
index 00000000..f1cd00f0
--- /dev/null
+++ b/appl/lib/mpeg.b
@@ -0,0 +1,148 @@
+implement Mpeg;
+
+include "sys.m";
+sys: Sys;
+FD, Connection: import Sys;
+include "draw.m";
+draw: Draw;
+Display, Rect, Image: import draw;
+include "mpeg.m";
+
+Chroma: con 16r05;
+
+getenv()
+{
+	if(sys != nil)
+		return;
+
+	sys = load Sys Sys->PATH;
+	draw = load Draw Draw->PATH;
+}
+
+copy(files: list of string, notify: chan of string, mpctl, mpdata: ref FD)
+{
+	ok, n: int;
+	c: Connection;
+	name: list of string;	
+
+	while(files != nil) {
+		file := hd files;
+		(n, name) = sys->tokenize(file, "@");
+		m : ref FD;
+		case n {
+		1 =>
+			m = sys->open(file, sys->OREAD);
+			if(m == nil) {
+				notify <-= "mpeg open:" + file;
+				return;
+			}
+		2 =>
+			(ok, c) = sys->dial(hd tl name, nil);
+			if(ok < 0) {
+				notify <-= "dial:" + hd tl name;
+				return;
+			}
+			sys->fprint(c.dfd, "%s\n", hd name);
+			c.cfd = nil;
+			m = c.dfd;
+		* =>
+			notify <-= "bad file:"+hd name;
+			return;
+		}
+		sys->stream(m, mpdata, 64*1024);
+		files = tl files;
+	}
+	sys->fprint(mpctl, "stop");
+	sys->fprint(mpctl, "window 0 0 0 0");
+	notify <-= "";
+}
+
+play(display: ref Display, w: ref Image, paint: int, r: Rect, file: string, notify: chan of string): string
+{
+ 	i, j: int;
+	line: string;
+	cfg: array of byte;
+	buf := array[1024] of byte;
+	arg, words, files: list of string;
+
+	getenv();
+
+	mpdata := sys->open("/dev/mpeg", sys->OWRITE);
+	if(mpdata == nil)
+		return sys->sprint("can't open /dev/mpeg: %r");
+
+	obj := sys->open(file, sys->OREAD);
+	if(obj == nil)
+		return "open failed:"+file;
+
+	n := sys->read(obj, buf, len buf);
+	if(n < 0)
+		return "mpeg object: read error";
+
+	mpctl := sys->open("/dev/mpegctl", sys->OWRITE);
+	if(mpctl == nil)
+		return "open mpeg ctl file";
+
+	# Parse into lines
+	(n, arg) = sys->tokenize(string buf[0:n], "\n");
+	for(i = 0; i < n; i++) {
+		# Parse into words
+		line = hd arg;
+		(j, words) = sys->tokenize(line, " \t");
+
+		# Pass device config lines through to the ctl file
+		if(hd words == "files")
+			files = tl words;
+		else {
+			cfg = array of byte line;
+			if(sys->write(mpctl, cfg, len cfg) < 0)
+				return "invalid device config:"+line;
+		}
+		arg = tl arg;
+	}
+
+	if(files == nil)
+		return "no file to play";
+
+	# now the driver is configured initialize the dsp's
+	# and set up the trident overlay
+	sys->fprint(mpctl, "init");
+	sys->fprint(mpctl, "window %d %d %d %d",
+			r.min.x, r.min.y, r.max.x, r.max.y);
+
+	# paint the window with the chroma key color
+	if(paint)
+		w.draw(r, keycolor(display), nil, r.min);
+
+	if(notify != nil) {
+		spawn copy(files, notify, mpctl, mpdata);
+		return "";
+	}
+	notify = chan of string;
+	spawn copy(files, notify, mpctl, mpdata);
+	return <-notify;
+}
+
+ctl(msg: string): int
+{
+	mpc: ref FD;
+
+	getenv();
+
+	mpc = sys->open("/dev/mpegctl", sys->OWRITE);
+	if(mpc == nil)
+		return -1;
+
+	b := array of byte msg;
+	n := sys->write(mpc, b, len b);
+	if(n != len b)
+		n = -1;
+
+	return n; 
+}
+
+keycolor(display: ref Display): ref Image
+{
+	getenv();
+	return display.color(Chroma);
+}