Demo/sgi/sv/burstcapt.py

   1 import sys
   2 import sv, SV
   3 import gl, GL, DEVICE
   4
   5 def main():
   6         format = SV.RGB8_FRAMES
   7         requestedwidth = SV.PAL_XMAX
   8         queuesize = 30
   9         if sys.argv[1:]:
  10                 queuesize = eval(sys.argv[1])
  11
  12         v = sv.OpenVideo()
  13         svci = (format, requestedwidth, 0, queuesize, 0)
  14
  15         go = raw_input('Press return to capture ' + `queuesize` + ' frames: ')
  16         result = v.CaptureBurst(svci)
  17         svci, buffer, bitvec = result
  18 ##      svci, buffer = result # XXX If bit vector not yet implemented
  19
  20         print 'Captured', svci[3], 'frames, i.e.', len(buffer)/1024, 'K bytes'
  21
  22         w, h = svci[1:3]
  23         framesize = w * h
  24
  25         gl.prefposition(300, 300+w-1, 100, 100+h-1)
  26         gl.foreground()
  27         win = gl.winopen('Burst Capture')
  28         gl.RGBmode()
  29         gl.gconfig()
  30         gl.qdevice(DEVICE.LEFTMOUSE)
  31         gl.qdevice(DEVICE.ESCKEY)
  32
  33         print 'Click left mouse for next frame'
  34
  35         for i in range(svci[3]):
  36                 inverted_frame = sv.RGB8toRGB32(1, \
  37                           buffer[i*framesize:(i+1)*framesize], w, h)
  38                 gl.lrectwrite(0, 0, w-1, h-1, inverted_frame)
  39                 while 1:
  40                         dev, val = gl.qread()
  41                         if dev == DEVICE.LEFTMOUSE and val == 1:
  42                                 break
  43                         if dev == DEVICE.REDRAW:
  44                                 gl.lrectwrite(0, 0, w-1, h-1, inverted_frame)
  45                         if dev == DEVICE.ESCKEY:
  46                                 v.CloseVideo()
  47                                 gl.winclose(win)
  48                                 return
  49         v.CloseVideo()
  50         gl.winclose(win)
  51
  52 main()