mirror of
https://github.com/python/cpython.git
synced 2025-10-31 10:26:02 +00:00
7e47402264
comments, docstrings or error messages. I fixed two minor things in
test_winreg.py ("didn't" -> "Didn't" and "Didnt" -> "Didn't").
There is a minor style issue involved: Guido seems to have preferred English
grammar (behaviour, honour) in a couple places. This patch changes that to
American, which is the more prominent style in the source. I prefer English
myself, so if English is preferred, I'd be happy to supply a patch myself ;)
429 lines
10 KiB
Python
Executable file
429 lines
10 KiB
Python
Executable file
#! /usr/bin/env python
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# Capture a CMIF movie using the Indigo video library and board in burst mode
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# User interface:
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#
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# Start the application. Resize the window to the desired movie size.
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# Press the left mouse button to start recording, release it to end
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# recording. You can record as many times as you wish, but each time
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# you overwrite the output file(s), so only the last recording is
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# kept.
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#
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# Press ESC or select the window manager Quit or Close window option
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# to quit. If you quit before recording anything, the output file(s)
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# are not touched.
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import sys
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sys.path.append('/ufs/guido/src/video')
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import sv, SV
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import VFile
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import gl, GL, DEVICE
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import al, AL
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import time
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import posix
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import getopt
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import string
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import imageop
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import sgi
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# Usage and help functions (keep this up-to-date if you change the program!)
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def usage():
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print 'Usage: Vrecb [options] [moviefile [audiofile]]'
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print
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print 'Options:'
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print '-a : record audio as well'
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print '-r rate : capture 1 out of every "rate" frames', \
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'(default and min 1)'
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print '-w width : initial window width', \
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'(default 256, use 0 for interactive placement)'
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print '-d : drop fields if needed'
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print '-g bits : greyscale (2, 4 or 8 bits)'
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print '-G : 2-bit greyscale dithered'
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print '-m : monochrome dithered'
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print '-M value : monochrome thresholded with value'
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print '-f : Capture fields (instead of frames)'
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print '-n number : Capture this many frames (default 60)'
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print '-N memsize : Capture frames fitting in this many kbytes'
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print 'moviefile : here goes the movie data (default film.video)'
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def help():
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print 'Press the left mouse button to start recording.'
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print 'Recording time is determined by the -n option.'
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print 'You can record as many times as you wish, but each'
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print 'recording overwrites the output file(s) -- only the'
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print 'last recording is kept.'
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print
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print 'Press ESC or use the window manager Quit or Close window option'
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print 'to quit. If you quit before recording anything, the output'
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print 'file(s) are not touched.'
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# Main program
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def main():
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format = SV.RGB8_FRAMES
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audio = 0
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rate = 1
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width = 256
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drop = 0
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mono = 0
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grey = 0
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greybits = 0
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monotreshold = -1
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fields = 0
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number = 0
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memsize = 0
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try:
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opts, args = getopt.getopt(sys.argv[1:], 'ar:w:dg:mM:Gfn:N:')
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except getopt.error, msg:
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sys.stdout = sys.stderr
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print 'Error:', msg, '\n'
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usage()
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sys.exit(2)
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try:
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for opt, arg in opts:
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if opt == '-a':
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audio = 1
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if opt == '-r':
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rate = string.atoi(arg)
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if rate < 1:
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sys.stderr.write('-r rate must be >= 1\n')
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sys.exit(2)
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elif opt == '-w':
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width = string.atoi(arg)
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elif opt == '-d':
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drop = 1
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elif opt == '-g':
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grey = 1
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greybits = string.atoi(arg)
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if not greybits in (2,4,8):
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sys.stderr.write( \
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'Only 2, 4 or 8 bit greyscale supported\n')
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sys.exit(2)
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elif opt == '-G':
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grey = 1
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greybits = -2
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elif opt == '-m':
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mono = 1
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elif opt == '-M':
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mono = 1
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monotreshold = string.atoi(arg)
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elif opt == '-f':
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fields = 1
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elif opt == '-n':
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number = string.atoi(arg)
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elif opt == '-N':
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memsize = string.atoi(arg)
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if 0 < memsize < 1024:
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memsize = memsize * 1024
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if 0 < memsize < 1024*1024:
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memsize = memsize * 1024
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print 'memsize', memsize
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except string.atoi_error:
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sys.stdout = sys.stderr
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print 'Option', opt, 'requires integer argument'
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sys.exit(2)
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if number <> 0 and memsize <> 0:
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sys.stderr.write('-n and -N are mutually exclusive\n')
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sys.exit(2)
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if number == 0 and memsize == 0:
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number = 60
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if not fields:
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print '-f option assumed until somebody fixes it'
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fields = 1
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if args[2:]:
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sys.stderr.write('usage: Vrecb [options] [file [audiofile]]\n')
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sys.exit(2)
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if args:
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filename = args[0]
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else:
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filename = 'film.video'
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if args[1:] and not audio:
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sys.stderr.write('-a turned on by appearance of 2nd file\n')
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audio = 1
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if audio:
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if args[1:]:
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audiofilename = args[1]
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else:
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audiofilename = 'film.aiff'
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else:
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audiofilename = None
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v = sv.OpenVideo()
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# Determine maximum window size based on signal standard
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param = [SV.BROADCAST, 0]
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v.GetParam(param)
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if param[1] == SV.PAL:
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x = SV.PAL_XMAX
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y = SV.PAL_YMAX
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elif param[1] == SV.NTSC:
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x = SV.NTSC_XMAX
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y = SV.NTSC_YMAX
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else:
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print 'Unknown video standard', param[1]
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sys.exit(1)
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gl.foreground()
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gl.maxsize(x, y)
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gl.keepaspect(x, y)
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gl.stepunit(8, 6)
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if width:
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height = width*3/4
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x1 = 150
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x2 = x1 + width-1
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y2 = 768-150
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y1 = y2-height+1
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gl.prefposition(x1, x2, y1, y2)
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win = gl.winopen(filename)
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if width:
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gl.maxsize(x, y)
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gl.keepaspect(x, y)
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gl.stepunit(8, 6)
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gl.winconstraints()
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x, y = gl.getsize()
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print x, 'x', y
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if memsize:
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number = calcnumber(x, y, grey or mono, memsize)
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print number, 'frames'
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v.SetSize(x, y)
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if drop:
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param = [SV.FIELDDROP, 1, SV.GENLOCK, SV.GENLOCK_OFF]
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else:
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param = [SV.FIELDDROP, 0, SV.GENLOCK, SV.GENLOCK_ON]
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if mono or grey:
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param = param+[SV.COLOR, SV.MONO, SV.DITHER, 0, \
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SV.INPUT_BYPASS, 1]
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else:
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param = param+[SV.COLOR, SV.DEFAULT_COLOR, SV.INPUT_BYPASS, 0]
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v.BindGLWindow(win, SV.IN_REPLACE)
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v.SetParam(param)
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gl.qdevice(DEVICE.LEFTMOUSE)
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gl.qdevice(DEVICE.WINQUIT)
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gl.qdevice(DEVICE.WINSHUT)
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gl.qdevice(DEVICE.ESCKEY)
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help()
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while 1:
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dev, val = gl.qread()
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if dev == DEVICE.LEFTMOUSE:
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if val == 1:
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info = format, x, y, number, rate
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record(v, info, filename, audiofilename, \
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mono, grey, \
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greybits, monotreshold, fields)
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elif dev == DEVICE.REDRAW:
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# Window resize (or move)
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x, y = gl.getsize()
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print x, 'x', y
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if memsize:
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number = calcnumber(x, y, grey or mono, memsize)
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print number, 'frames'
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v.SetSize(x, y)
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v.BindGLWindow(win, SV.IN_REPLACE)
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elif dev in (DEVICE.ESCKEY, DEVICE.WINQUIT, DEVICE.WINSHUT):
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# Quit
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v.CloseVideo()
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gl.winclose(win)
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break
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def calcnumber(x, y, grey, memsize):
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pixels = x*y
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pixels = pixels/2 # XXX always assume fields
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if grey: n = memsize/pixels
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else: n = memsize/(4*pixels)
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return max(1, n)
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# Record until the mouse is released (or any other GL event)
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# XXX audio not yet supported
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def record(v, info, filename, audiofilename, \
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mono, grey, greybits, monotreshold, fields):
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import thread
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format, x, y, number, rate = info
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fps = 59.64 # Fields per second
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# XXX (Strange: need fps of Indigo monitor, not of PAL or NTSC!)
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tpf = 1000.0 / fps # Time per field in msec
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#
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# Go grab
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#
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if audiofilename:
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gl.wintitle('(start audio) ' + filename)
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audiodone = thread.allocate_lock()
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audiodone.acquire_lock()
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audiostart = thread.allocate_lock()
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audiostart.acquire_lock()
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audiostop = []
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initaudio(audiofilename, audiostop, audiostart, audiodone)
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audiostart.acquire_lock()
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gl.wintitle('(rec) ' + filename)
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try:
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ninfo, data, bitvec = v.CaptureBurst(info)
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except sv.error, arg:
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print 'CaptureBurst failed:', arg
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print 'info:', info
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gl.wintitle(filename)
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return
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gl.wintitle('(save) '+ filename)
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#
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# Check results
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#
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if info <> ninfo:
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print 'Sorry, format changed.'
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print 'Wanted:',info
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print 'Got :',ninfo
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gl.wintitle(filename)
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return
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# print bitvec
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if x*y*number <> len(data):
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print 'Funny data length: wanted',x,'*',y,'*', number,'=',\
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x*y*number,'got',len(data)
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gl.wintitle(filename)
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return
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#
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# Save
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#
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if filename and audiofilename:
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audiostop.append(None)
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audiodone.acquire_lock()
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if filename:
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#
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# Construct header and write it
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#
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try:
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vout = VFile.VoutFile(filename)
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except IOError, msg:
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print filename, ':', msg
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sys.exit(1)
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if mono:
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vout.format = 'mono'
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elif grey and greybits == 8:
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vout.format = 'grey'
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elif grey:
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vout.format = 'grey'+`abs(greybits)`
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else:
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vout.format = 'rgb8'
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vout.width = x
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vout.height = y
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if fields:
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vout.packfactor = (1,-2)
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else:
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print 'Sorry, can only save fields at the moment'
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print '(i.e. you *must* use the -f option)'
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gl.wintitle(filename)
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return
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vout.writeheader()
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#
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# Compute convertor, if needed
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#
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convertor = None
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if grey:
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if greybits == 2:
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convertor = imageop.grey2grey2
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elif greybits == 4:
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convertor = imageop.grey2grey4
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elif greybits == -2:
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convertor = imageop.dither2grey2
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fieldsize = x*y/2
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nskipped = 0
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realframeno = 0
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tpf = 1000 / 50.0 #XXXX
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# Trying to find the pattern in frame skipping
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okstretch = 0
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skipstretch = 0
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for frameno in range(0, number*2):
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if frameno <> 0 and \
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bitvec[frameno] == bitvec[frameno-1]:
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nskipped = nskipped + 1
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if okstretch:
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print okstretch, 'ok',
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okstretch = 0
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skipstretch = skipstretch + 1
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continue
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if skipstretch:
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print skipstretch, 'skipped'
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skipstretch = 0
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okstretch = okstretch + 1
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#
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# Save field.
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# XXXX Works only for fields and top-to-bottom
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#
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start = frameno*fieldsize
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field = data[start:start+fieldsize]
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if convertor:
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field = convertor(field, len(field), 1)
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elif mono and monotreshold >= 0:
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field = imageop.grey2mono( \
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field, len(field), 1, monotreshold)
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elif mono:
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field = imageop.dither2mono( \
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field, len(field), 1)
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realframeno = realframeno + 1
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vout.writeframe(int(realframeno*tpf), field, None)
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print okstretch, 'ok',
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print skipstretch, 'skipped'
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print 'Skipped', nskipped, 'duplicate frames'
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vout.close()
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gl.wintitle('(done) ' + filename)
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# Initialize audio recording
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AQSIZE = 8*8000 # XXX should be a user option
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def initaudio(filename, stop, start, done):
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import thread, aifc
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afile = aifc.open(filename, 'w')
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afile.setnchannels(AL.MONO)
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afile.setsampwidth(AL.SAMPLE_8)
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params = [AL.INPUT_RATE, 0]
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al.getparams(AL.DEFAULT_DEVICE, params)
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print 'audio sampling rate =', params[1]
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afile.setframerate(params[1])
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c = al.newconfig()
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c.setchannels(AL.MONO)
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c.setqueuesize(AQSIZE)
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c.setwidth(AL.SAMPLE_8)
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aport = al.openport(filename, 'r', c)
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thread.start_new_thread(audiorecord, (afile, aport, stop, start, done))
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# Thread to record audio samples
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def audiorecord(afile, aport, stop, start, done):
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start.release_lock()
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leeway = 4
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while leeway > 0:
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if stop:
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leeway = leeway - 1
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data = aport.readsamps(AQSIZE/8)
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afile.writesampsraw(data)
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del data
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afile.close()
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print 'Done writing audio'
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done.release_lock()
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# Don't forget to call the main program
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try:
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main()
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except KeyboardInterrupt:
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print '[Interrupt]'
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