Initial revision

1 files changed, 129 insertions, 0 deletions

diff --git a/Demo/sgi/video/cam.py b/Demo/sgi/video/cam.py
new file mode 100755
index 0000000..f30e1e0
--- /dev/null
+++ b/Demo/sgi/video/cam.py
@@ -0,0 +1,129 @@
+import sys
+from socket import *
+from gl import *
+from GL import *
+from DEVICE import *
+from time import millitimer
+
+HS = 40 # Header size (must be same as in tv.py)
+
+# Rely on UDP packet (de)fragmentation for smoother images
+# (Changed for broadcast)
+MAX = 16000
+
+PF = 2 # Default packfactor
+
+# Default receiver station is voorn.
+# Kwik has no yellow pages, so...
+HOST = '192.16.201.121'
+PORT = 5555
+
+if sys.argv[1:]:
+	PF = eval(sys.argv[1])
+
+if sys.argv[2:]:
+	HOST = sys.argv[2]
+	if HOST = 'all':
+		HOST = '<broadcast>'
+		MAX = 1400
+
+PF2 = PF*PF
+
+def main():
+	centerx, centery = 400, 300
+
+	foreground()
+	wid = winopen('cam')
+	RGBmode()
+	doublebuffer()
+	gconfig()
+	qdevice(ESCKEY)
+
+	w, h = getsize()
+	ortho2(0, w, 0, h)
+	w = w/PF*PF
+	h = h/PF*PF
+
+	readsource(SRC_FRAMEGRABBER)
+
+	s = socket(AF_INET, SOCK_DGRAM)
+	if HOST = '<broadcast>':
+		s.allowbroadcast(1)
+	addr = HOST, PORT
+
+	bytesperline = w/PF2
+	linesperchunk = MAX/bytesperline
+	linesperchunk = linesperchunk/PF*PF
+	nchunks = (h+linesperchunk-1)/linesperchunk
+
+	print 'MAX=', MAX,
+	print 'linesperchunk=', linesperchunk,
+	print 'nchunks=', nchunks,
+	print 'w=', w, 'h=', h
+
+	x1, x2 = 0, w-1
+
+	t1 = millitimer()
+	nframes = 0
+	fps = 0
+
+	msg = ''
+
+	while 1:
+		while qtest():
+			dev, val = qread()
+			if dev = REDRAW:
+				reshapeviewport()
+				w, h = getsize()
+				ortho2(0, w, 0, h)
+				w = w/PF*PF
+				h = h/PF*PF
+
+				bytesperline = w/PF2
+				linesperchunk = MAX/bytesperline
+				linesperchunk = linesperchunk/PF*PF
+				nchunks = (h+linesperchunk-1)/linesperchunk
+
+				print 'MAX=', MAX,
+				print 'linesperchunk=', linesperchunk,
+				print 'nchunks=', nchunks,
+				print 'w=', w, 'h=', h
+
+				x1, x2 = 0, w-1
+
+				fps = 0
+
+			elif dev = ESCKEY:
+				winclose(wid)
+				return
+
+		readsource(SRC_FRAMEGRABBER)
+
+		nframes = nframes+1
+		if nframes >= fps:
+			t2 = millitimer()
+			if t2 <> t1:
+				fps = int(10000.0*nframes/(t2-t1)) * 0.1
+				msg = `fps` +  ' frames/sec'
+				t1 = t2
+				nframes = 0
+
+		RGBcolor(255,255,255)
+		cmov2i(9,9)
+		charstr(msg)
+
+		swapbuffers()
+		rectcopy(centerx-w/2, centery-w/2, centerx+w/2, centery+w/2, 0, 0)
+
+		for i in range(nchunks):
+			y1 = i*linesperchunk
+			y2 = y1 + linesperchunk-1
+			if y2 >= h: y2 = h-1
+			data = lrectread(x1, y1, x2, y2)
+			data2 = packrect(x2-x1+1, y2-y1+1, PF, data)
+			prefix = `w, h, PF, x1, y1, x2, y2`
+			prefix = prefix + ' ' * (HS-len(prefix))
+			data3 = prefix + data2
+			s.sendto(data3, addr)
+
+main()