| 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 | |
| 5 | def main(): |
| 6 | format = SV.RGB8_FRAMES |
| 7 | framerate = 25 |
| 8 | queuesize = 16 |
| 9 | samplingrate = 2 |
| 10 | |
| 11 | v = sv.OpenVideo() |
| 12 | # Determine maximum window size based on signal standard |
| 13 | param = [SV.BROADCAST, 0] |
| 14 | v.GetParam(param) |
| 15 | if param[1] == SV.PAL: |
| 16 | width = SV.PAL_XMAX |
| 17 | height = SV.PAL_YMAX |
| 18 | framefreq = 25 |
| 19 | else: |
| 20 | width = SV.NTSC_XMAX |
| 21 | height = SV.NTSC_YMAX |
| 22 | framefreq = 30 |
| 23 | |
| 24 | # Allow resizing window if capturing RGB frames, which can be scaled |
| 25 | if format == SV.RGB8_FRAMES: |
| 26 | gl.keepaspect(width, height) |
| 27 | gl.maxsize(width, height) |
| 28 | gl.stepunit(8, 6) |
| 29 | gl.minsize(120, 90) |
| 30 | else: |
| 31 | if format == SV.YUV411_FRAMES_AND_BLANKING_BUFFER: |
| 32 | height = height + SV.BLANKING_BUFFER_SIZE |
| 33 | gl.prefposition(300, 300+width-1, 100, 100+height-1) |
| 34 | |
| 35 | # Open the window |
| 36 | gl.foreground() |
| 37 | win = gl.winopen('Continuous Capture') |
| 38 | gl.RGBmode() |
| 39 | gl.gconfig() |
| 40 | if format == SV.RGB8_FRAMES: |
| 41 | width, height = gl.getsize() |
| 42 | gl.pixmode(GL.PM_SIZE, 8) |
| 43 | else: |
| 44 | gl.pixmode(GL.PM_SIZE, 32) |
| 45 | |
| 46 | svci = (format, width, height, queuesize, samplingrate) |
| 47 | [svci] |
| 48 | |
| 49 | svci = v.InitContinuousCapture(svci) |
| 50 | width, height = svci[1:3] |
| 51 | [svci] |
| 52 | |
| 53 | hz = gl.getgdesc(GL.GD_TIMERHZ) |
| 54 | gl.noise(DEVICE.TIMER0, hz / framerate) |
| 55 | gl.qdevice(DEVICE.TIMER0) |
| 56 | gl.qdevice(DEVICE.WINQUIT) |
| 57 | gl.qdevice(DEVICE.WINSHUT) |
| 58 | gl.qdevice(DEVICE.ESCKEY) |
| 59 | |
| 60 | ndisplayed = 0 |
| 61 | lastfieldID = 0 |
| 62 | |
| 63 | while 1: |
| 64 | dev, val = gl.qread() |
| 65 | if dev == DEVICE.REDRAW: |
| 66 | oldw = width |
| 67 | oldh = height |
| 68 | width, height = gl.getsize() |
| 69 | if oldw != width or oldh != height: |
| 70 | v.EndContinuousCapture() |
| 71 | gl.viewport(0, width-1, 0, height-1) |
| 72 | svci = (svci[0], width, height) + svci[3:] |
| 73 | svci = v.InitContinuousCapture(svci) |
| 74 | width, height = svci[1:3] |
| 75 | [svci] |
| 76 | if ndisplayed: |
| 77 | print 'lost', |
| 78 | print fieldID/(svci[4]*2) - ndisplayed, |
| 79 | print 'frames' |
| 80 | ndisplayed = 0 |
| 81 | elif dev == DEVICE.TIMER0: |
| 82 | try: |
| 83 | captureData, fieldID = v.GetCaptureData() |
| Guido van Rossum | 411588c | 1992-12-14 15:51:53 +0000 | [diff] [blame] | 84 | except sv.error, val: |
| Guido van Rossum | db96c5a | 1992-09-03 17:01:36 +0000 | [diff] [blame] | 85 | if val <> 'no data available': |
| 86 | print val |
| 87 | continue |
| 88 | if fieldID - lastfieldID <> 2*samplingrate: |
| 89 | print lastfieldID, fieldID |
| 90 | lastfieldID = fieldID |
| 91 | if svci[0] == SV.RGB8_FRAMES: |
| 92 | rgbbuf = captureData.InterleaveFields(1) |
| 93 | else: |
| 94 | rgbbuf = captureData.YUVtoRGB(1) |
| 95 | captureData.UnlockCaptureData() |
| 96 | gl.lrectwrite(0, 0, width-1, height-1, rgbbuf) |
| 97 | ndisplayed = ndisplayed + 1 |
| 98 | elif dev in (DEVICE.ESCKEY, DEVICE.WINQUIT, DEVICE.WINSHUT): |
| 99 | v.EndContinuousCapture() |
| 100 | v.CloseVideo() |
| 101 | gl.winclose(win) |
| 102 | print fieldID, ndisplayed, svci[4] |
| 103 | print 'lost', fieldID/(svci[4]*2) - ndisplayed, |
| 104 | print 'frames' |
| 105 | return |
| 106 | |
| 107 | main() |