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82 lines
1.9 KiB
Python
82 lines
1.9 KiB
Python
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import sys
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import sv, SV
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import gl, GL, DEVICE
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import time
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def main():
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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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width = SV.PAL_XMAX
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height = SV.PAL_YMAX
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elif param[1] == SV.NTSC:
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width = SV.NTSC_XMAX
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height = 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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# Initially all windows are half size
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grabwidth, grabheight = width/2, height/2
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# Open still window
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gl.foreground()
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gl.prefsize(grabwidth, grabheight)
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still_win = gl.winopen('Grabbed frame')
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gl.keepaspect(width, height)
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gl.maxsize(width, height)
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gl.winconstraints()
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gl.RGBmode()
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gl.gconfig()
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gl.clear()
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gl.pixmode(GL.PM_SIZE, 8)
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# Open live window
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gl.foreground()
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gl.prefsize(grabwidth, grabheight)
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live_win = gl.winopen('Live video')
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gl.keepaspect(width, height)
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gl.maxsize(width, height)
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gl.winconstraints()
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# Bind live video
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v.SetSize(gl.getsize())
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v.BindGLWindow(live_win, SV.IN_REPLACE)
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print 'Use leftmouse to grab frame'
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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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frame = None
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while 1:
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dev, val = gl.qread()
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if dev == DEVICE.LEFTMOUSE and val == 0:
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w, h, fields = v.CaptureOneFrame(SV.RGB8_FRAMES, \
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grabwidth, grabheight)
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frame = sv.InterleaveFields(1, fields, w, h)
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gl.winset(still_win)
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gl.lrectwrite(0, 0, w - 1, h - 1, frame)
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gl.winset(live_win)
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if dev in (DEVICE.ESCKEY, DEVICE.WINQUIT, DEVICE.WINSHUT):
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v.CloseVideo()
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gl.winclose(live_win)
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gl.winclose(still_win)
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break
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if dev == DEVICE.REDRAW and val == still_win:
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gl.winset(still_win)
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gl.reshapeviewport()
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gl.clear()
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grabwidth, grabheight = gl.getsize()
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if frame:
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gl.lrectwrite(0, 0, w - 1, h - 1, frame)
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gl.winset(live_win)
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if dev == DEVICE.REDRAW and val == live_win:
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v.SetSize(gl.getsize())
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v.BindGLWindow(live_win, SV.IN_REPLACE)
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main()
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