mirror of https://github.com/python/cpython
79 lines
2.0 KiB
Python
Executable File
79 lines
2.0 KiB
Python
Executable File
# Live video output (display video on the screen, presumably from the net)
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import gl
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from VFile import Displayer
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# Video output (displayer) class.
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class LiveVideoOut:
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# Call this to initialize things. Arguments:
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# wid: the window id where the video is to be displayed (centered)
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# vw, vh: size of the video image to be displayed
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def init(self, wid, vw, vh, type):
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##print 'Init', wid, xywh
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##print 'video', vw, vw
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self.vw = vw
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self.vh = vh
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self.disp = Displayer().init()
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if not type in ('rgb8', 'grey', 'mono'):
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raise 'Incorrent live video output type'
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info = (type, vw, vh, 1, 8, 0, 0, 0, 0)
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self.disp.setinfo(info)
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self.wid = wid
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oldwid = gl.winget()
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gl.winset(wid)
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self.disp.initcolormap()
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self.reshapewindow()
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gl.winset(oldwid)
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return self
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# Call this in response to every REDRAW event for the window
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# or if the window size has changed for other reasons.
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def reshapewindow(self):
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oldwid = gl.winget()
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gl.winset(self.wid)
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gl.reshapeviewport()
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w, h = gl.getsize()
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self.disp.xorigin = (w-self.vw)/2
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self.disp.yorigin = (h-self.vh)/2
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self.disp.clear()
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gl.winset(oldwid)
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# Call this to change the size of the video images being displayed.
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# Implies reshapewindow().
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def resizevideo(self, vw, vh):
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self.vw, self.vh = vw, vh
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self.disp.setsize(vw, vh)
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self.reshapewindow()
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# Call this to display the next video packet. Arguments:
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# pos: line number where the packet begins
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# data: image data of the packet
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# (these correspond directly to the return values from
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# LiveVideoIn.getnextpacket()).
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def putnextpacket(self, pos, data):
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if self.disp.format == 'mono':
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# Unfortunately size-check is difficult for
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# packed video
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nline = (len(data)*8)/self.vw
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else:
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nline = len(data)/self.vw
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if nline*self.vw <> len(data):
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print 'Incorrect-sized video fragment ignored'
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return
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oldwid = gl.winget()
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gl.winset(self.wid)
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self.disp.showpartframe(data, None, (0, pos, self.vw, nline))
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gl.winset(oldwid)
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# Call this to close the window.
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def close(self):
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pass
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