| Guido van Rossum | db96c5a | 1992-09-03 17:01:36 +0000 | [diff] [blame] | 1 | import sys |
| 2 | import sv, SV |
| 3 | import gl, GL, DEVICE |
| 4 | import time |
| 5 | |
| 6 | def main(): |
| 7 | v = sv.OpenVideo() |
| 8 | # Determine maximum window size based on signal standard |
| 9 | param = [SV.BROADCAST, 0] |
| 10 | v.GetParam(param) |
| 11 | if param[1] == SV.PAL: |
| 12 | width = SV.PAL_XMAX |
| 13 | height = SV.PAL_YMAX |
| 14 | elif param[1] == SV.NTSC: |
| 15 | width = SV.NTSC_XMAX |
| 16 | height = SV.NTSC_YMAX |
| 17 | else: |
| 18 | print 'Unknown video standard', param[1] |
| 19 | sys.exit(1) |
| 20 | |
| 21 | # Initially all windows are half size |
| 22 | grabwidth, grabheight = width/2, height/2 |
| 23 | |
| 24 | # Open still window |
| 25 | gl.foreground() |
| 26 | gl.prefsize(grabwidth, grabheight) |
| 27 | still_win = gl.winopen('Grabbed frame') |
| 28 | gl.keepaspect(width, height) |
| 29 | gl.maxsize(width, height) |
| 30 | gl.winconstraints() |
| 31 | gl.RGBmode() |
| 32 | gl.gconfig() |
| 33 | gl.clear() |
| 34 | gl.pixmode(GL.PM_SIZE, 8) |
| 35 | |
| 36 | # Open live window |
| 37 | gl.foreground() |
| 38 | gl.prefsize(grabwidth, grabheight) |
| 39 | live_win = gl.winopen('Live video') |
| 40 | gl.keepaspect(width, height) |
| 41 | gl.maxsize(width, height) |
| 42 | gl.winconstraints() |
| 43 | |
| 44 | # Bind live video |
| 45 | v.SetSize(gl.getsize()) |
| 46 | v.BindGLWindow(live_win, SV.IN_REPLACE) |
| 47 | |
| 48 | print 'Use leftmouse to grab frame' |
| 49 | |
| 50 | gl.qdevice(DEVICE.LEFTMOUSE) |
| 51 | gl.qdevice(DEVICE.WINQUIT) |
| 52 | gl.qdevice(DEVICE.WINSHUT) |
| 53 | gl.qdevice(DEVICE.ESCKEY) |
| 54 | frame = None |
| 55 | while 1: |
| 56 | dev, val = gl.qread() |
| 57 | if dev == DEVICE.LEFTMOUSE and val == 0: |
| 58 | w, h, fields = v.CaptureOneFrame(SV.RGB8_FRAMES, \ |
| 59 | grabwidth, grabheight) |
| 60 | frame = sv.InterleaveFields(1, fields, w, h) |
| 61 | gl.winset(still_win) |
| 62 | gl.lrectwrite(0, 0, w - 1, h - 1, frame) |
| 63 | gl.winset(live_win) |
| 64 | if dev in (DEVICE.ESCKEY, DEVICE.WINQUIT, DEVICE.WINSHUT): |
| 65 | v.CloseVideo() |
| 66 | gl.winclose(live_win) |
| 67 | gl.winclose(still_win) |
| 68 | break |
| 69 | if dev == DEVICE.REDRAW and val == still_win: |
| 70 | gl.winset(still_win) |
| 71 | gl.reshapeviewport() |
| 72 | gl.clear() |
| 73 | grabwidth, grabheight = gl.getsize() |
| 74 | if frame: |
| 75 | gl.lrectwrite(0, 0, w - 1, h - 1, frame) |
| 76 | gl.winset(live_win) |
| 77 | if dev == DEVICE.REDRAW and val == live_win: |
| 78 | v.SetSize(gl.getsize()) |
| 79 | v.BindGLWindow(live_win, SV.IN_REPLACE) |
| 80 | |
| 81 | main() |