cpython/Demo/sgi/video/Vplay.py

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#! /ufs/guido/bin/sgi/python
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# Play CMIF movie files
# Help function
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def help():
print 'Usage: Vplay [options] [file] ...'
print
print 'Options:'
print '-M magnify : magnify the image by the given factor'
print '-d : write some debug stuff on stderr'
print '-l : loop, playing the movie over and over again'
print '-m delta : drop frames closer than delta seconds (default 0.)'
print '-n : don\'t wait after each file'
print '-q : quiet, no informative messages'
print '-r delta : regenerate input time base delta seconds apart'
print '-s speed : speed change factor (default 1.0)'
print '-t : use a 2nd thread for read-ahead'
print '-x left : window offset from left of screen'
print '-y top : window offset from top of screen'
print '-w width : window width'
print '-h height : window height'
print '-b color : background color (white,black or (r,g,b))'
print 'file ... : file(s) to play; default film.video'
print
print 'User interface:'
print 'Press the left mouse button to stop or restart the movie.'
print 'Press ESC or use the window manager Close or Quit command'
print 'to close the window and play the next file (if any).'
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# Imported modules
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import sys
sys.path.append('/ufs/guido/src/video') # Increase chance of finding VFile
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import VFile
import time
import gl, GL
from DEVICE import REDRAW, ESCKEY, LEFTMOUSE, WINSHUT, WINQUIT
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import getopt
import string
# Global options
debug = 0
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looping = 0
magnify = 1
mindelta = 0
nowait = 0
quiet = 0
regen = None
speed = 1.0
threading = 0
xoff = yoff = None
xwsiz = ywsiz = None
bgcolor = None
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# Main program -- mostly command line parsing
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def main():
global debug, looping, magnify, mindelta, nowait, quiet, regen, speed
global threading, xoff, yoff, xwsiz, ywsiz, bgcolor
# Parse command line
try:
opts, args = getopt.getopt(sys.argv[1:], \
'M:dlm:nqr:s:tx:y:w:h:b:')
except getopt.error, msg:
sys.stdout = sys.stderr
print 'Error:', msg, '\n'
help()
sys.exit(2)
# Interpret options
try:
for opt, arg in opts:
if opt == '-M': magnify = float(eval(arg))
if opt == '-d': debug = debug + 1
if opt == '-l': looping = 1
if opt == '-m': mindelta = float(eval(arg))
if opt == '-n': nowait = 1
if opt == '-q': quiet = 1
if opt == '-r': regen = float(eval(arg))
if opt == '-s':
try:
speed = float(eval(arg))
except:
sys.stdout = sys.stderr
print 'Option -s needs float argument'
sys.exit(2)
if opt == '-t':
try:
import thread
threading = 1
except ImportError:
print 'Sorry, this version of Python',
print 'does not support threads:',
print '-t ignored'
if opt == '-x': xoff = string.atoi(arg)
if opt == '-y': yoff = string.atoi(arg)
if opt == '-w': xwsiz = string.atoi(arg)
if opt == '-h': ywsiz = string.atoi(arg)
if opt == '-b':
if arg == 'black':
bgcolor = (0,0,0)
elif arg == 'white':
bgcolor = (255,255,255)
else:
try:
bgcolor = eval(arg)
xxr, xxg, xxb = bgcolor
except:
print '-b needs (r,g,b) tuple'
sys.exit(2)
except string.atoi_error:
sys.stdout = sys.stderr
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print 'Option', opt, 'requires integer argument'
sys.exit(2)
# Check validity of certain options combinations
if nowait and looping:
print 'Warning: -n and -l are mutually exclusive; -n ignored'
nowait = 0
if xoff <> None and yoff == None:
print 'Warning: -x without -y ignored'
if xoff == None and yoff <> None:
print 'Warning: -y without -x ignored'
# Process all files
if not args: args = ['film.video']
sts = 0
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for filename in args:
sts = (process(filename) or sts)
# Exit with proper exit status
sys.exit(sts)
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# Process one movie file
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def process(filename):
try:
vin = VFile.VinFile(filename)
except IOError, msg:
sys.stderr.write(filename + ': I/O error: ' + `msg` + '\n')
return 1
except VFile.Error, msg:
sys.stderr.write(msg + '\n')
return 1
except EOFError:
sys.stderr.write(filename + ': EOF in video header\n')
return 1
if not quiet:
vin.printinfo()
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gl.foreground()
width, height = int(vin.width * magnify), int(vin.height * magnify)
xborder = yborder = 0
if xwsiz:
vin.xorigin = (xwsiz - width)/2
width = xwsiz
if ywsiz:
vin.yorigin = (ywsiz - height)/2
height = ywsiz
if xoff <> None and yoff <> None:
scrheight = gl.getgdesc(GL.GD_YPMAX)
gl.prefposition(xoff, xoff+width-1, \
scrheight-yoff-height, scrheight-yoff-1)
else:
gl.prefsize(width, height)
win = gl.winopen(filename)
gl.clear()
if quiet: vin.quiet = 1
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vin.initcolormap()
if bgcolor:
r, g, b = bgcolor
vin.clearto(r,g,b)
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gl.qdevice(ESCKEY)
gl.qdevice(WINSHUT)
gl.qdevice(WINQUIT)
gl.qdevice(LEFTMOUSE)
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stop = 0
while not stop:
gl.wintitle(filename)
stop = (playonce(vin) or nowait)
gl.wintitle('(done) ' + filename)
if not looping:
while not stop:
dev, val = gl.qread()
if dev == REDRAW:
if bgcolor:
r,g,b = bgcolor
vin.clearto(r,g,b)
else:
vin.clear()
if dev == LEFTMOUSE and val == 1:
break # Continue outer loop
if dev == ESCKEY and val == 1 or \
dev in (WINSHUT, WINQUIT):
stop = 1
# Set xoff, yoff for the next window from the current window
global xoff, yoff
xoff, yoff = gl.getorigin()
width, height = gl.getsize()
scrheight = gl.getgdesc(GL.GD_YPMAX)
yoff = scrheight - yoff - height
gl.winclose(win)
return 0
# Play a movie once; return 1 if user wants to stop, 0 if not
def playonce(vin):
vin.rewind()
vin.colormapinited = 1
vin.magnify = magnify
if threading:
MAXSIZE = 20 # Don't read ahead too much
import thread
import Queue
queue = Queue.Queue(MAXSIZE)
stop = []
thread.start_new_thread(read_ahead, (vin, queue, stop))
# Get the read-ahead thread going
while queue.qsize() < MAXSIZE/2 and not stop:
time.sleep(0.100)
tin = 0
toffset = 0
oldtin = 0
told = 0
nin = 0
nout = 0
nlate = 0
nskipped = 0
data = None
tlast = t0 = time.time()
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while 1:
if gl.qtest():
dev, val = gl.qread()
if dev == ESCKEY and val == 1 or \
dev in (WINSHUT, WINQUIT) or \
dev == LEFTMOUSE and val == 1:
if debug: sys.stderr.write('\n')
if threading:
stop.append(None)
while 1:
item = queue.get()
if item == None: break
return (dev != LEFTMOUSE)
if dev == REDRAW:
gl.reshapeviewport()
if data: vin.showframe(data, cdata)
if threading:
if debug and queue.empty(): sys.stderr.write('.')
item = queue.get()
if item == None: break
tin, data, cdata = item
else:
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try:
tin, size, csize = vin.getnextframeheader()
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except EOFError:
break
tin = tin*0.001
nin = nin+1
if tin+toffset < oldtin:
print 'Fix reversed time:', oldtin, 'to', tin
toffset = oldtin - tin
tin = tin + toffset
oldtin = tin
if regen: tout = nin * regen
else: tout = tin
tout = tout / speed
if tout - told < mindelta:
nskipped = nskipped + 1
if not threading:
vin.skipnextframedata(size, csize)
else:
if not threading:
try:
data, cdata = \
vin.getnextframedata(size, csize)
except EOFError:
if not quiet:
print '[incomplete last frame]'
break
now = time.time()
dt = (tout-told) - (now-tlast)
told = tout
if debug: sys.stderr.write(`round(dt, 3)` + ' ')
if dt < 0: nlate = nlate + 1
if dt > 0:
time.sleep(dt)
now = time.time()
tlast = now
vin.showframe(data, cdata)
nout = nout + 1
t1 = time.time()
if debug: sys.stderr.write('\n')
if quiet: return 0
print 'Recorded:', nin, 'frames in', round(tin, 3), 'sec.',
if tin: print '-- average', round(nin/tin, 1), 'frames/sec',
print
if nskipped: print 'Skipped', nskipped, 'frames'
tout = t1-t0
print 'Played:', nout,
print 'frames in', round(tout, 3), 'sec.',
if tout: print '-- average', round(nout/tout, 1), 'frames/sec',
print
if nlate: print 'There were', nlate, 'late frames'
return 0
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# Read-ahead thread
def read_ahead(vin, queue, stop):
try:
while not stop: queue.put(vin.getnextframe())
except EOFError:
pass
queue.put(None)
stop.append(None)
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# Don't forget to call the main program
try:
main()
except KeyboardInterrupt:
print '[Interrupt]'