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