Demo/sgi/video/vinfo.py

   1 from gl import *
   2 from GL import *
   3 from DEVICE import *
   4 import time
   5 import sys
   6 import getopt
   7
   8 class Struct(): pass
   9 epoch = Struct()
  10 EndOfFile = 'End of file'
  11 bye = 'bye'
  12
  13 def openvideo(filename):
  14         f = open(filename, 'r')
  15         line = f.readline()
  16         if not line: raise EndOfFile
  17         if line[:4] == 'CMIF': line = f.readline()
  18         x = eval(line[:-1])
  19         if len(x) == 3: w, h, pf = x
  20         else: w, h = x; pf = 2
  21         return f, w, h, pf
  22
  23 def loadframe(f, w, h, pf):
  24         line = f.readline()
  25         if line == '':
  26                 raise EndOfFile
  27         x = eval(line[:-1])
  28         if type(x) == type(0) or type(x) == type(0.0):
  29                 tijd = x
  30                 if pf == 0:
  31                         size = w*h*4
  32                 else:
  33                         size = (w/pf) * (h/pf)
  34         else:
  35                 tijd, size = x
  36         f.seek(size, 1)
  37         return tijd
  38
  39 def main():
  40         delta = 0
  41         short = 0
  42         try:
  43                 opts, names = getopt.getopt(sys.argv[1:], 'ds')
  44         except getopt.error, msg:
  45                 sys.stderr.write(msg + '\n')
  46                 sys.stderr.write('usage: vinfo [-d] [-s] [file] ...\n')
  47                 sys.exit(2)
  48         for opt, arg in opts:
  49                 if opt == '-d': delta = 1       # print delta between frames
  50                 elif opt == '-s': short = 1     # short: don't print times
  51         if names == []:
  52                 names = ['film.video']
  53         for name in names:
  54             try:
  55                 f, w, h, pf = openvideo(name)
  56             except:
  57                 sys.stderr.write(name + ': cannot open\n')
  58                 continue
  59             if pf == 0:
  60                 size = w*h*4
  61             else:
  62                 size = (w/pf) * (h/pf)
  63             print name, ':', w, 'x', h, '; pf =', pf, ', size =', size,
  64             if pf == 0:
  65                     print '(color)',
  66             else:
  67                     print '(' + `(w/pf)` + 'x' + `(h/pf)` + ')',
  68                     if (w/pf)%4 <> 0: print '!!!',
  69             print
  70             num = 0
  71             try:
  72                 otijd = 0
  73                 while not short:
  74                     try:
  75                         tijd = loadframe(f, w, h, pf)
  76                         if delta: print '\t' + `tijd-otijd`,
  77                         else: print '\t' + `tijd`,
  78                         otijd = tijd
  79                         num = num + 1
  80                         if num % 8 == 0:
  81                                 print
  82                     except EndOfFile:
  83                         raise bye
  84             except bye:
  85                 pass
  86             if num % 8 <> 0:
  87                 print
  88             f.close()
  89
  90 main()