def snapshot(self, timeout=1):
self.__imageCache = Queue.Queue(64)
self.burstCount = 2
self.openCapture()
ret = self.__cam.StartDevice()
if ret != fg.FCE_NOERROR:
raise AVTCameraError(ret)
frame = fg.FGFRAME()
for i in xrange(2):
ret = self.__cam.GetFrame(frame)
if ret != fg.FCE_NOERROR:
raise AVTCameraError(ret)
if i != 1:
ret = self.__cam.PutFrame(frame)
if ret != fg.FCE_NOERROR:
raise AVTCameraError(ret)
continue
try:
rc = self.roi
w = rc[2]
h = rc[3]
flagInvalid = frame.Flags & fg.FGF_INVALID
flagLast = frame.Flags & fg.FGF_LAST
flagDMAHalted = frame.Flags & fg.FGF_DMAHALTED
flagForcePost = frame.Flags & fg.FGF_FORCEPOST
tsl = frame.RxTime.Low
tsh = frame.RxTime.High
if self.deinterlace is None:
# No deinterlace
rawData = fg.cdata(frame.pData, frame.Length)
else:
rawData = fg.Deinterlace(frame, self.deinterlace, w, h, w,
w * h)
snapshotData = {
'RawData': rawData,
'ROI': rc,
'FrameId': frame.Id,
'Invalid': bool(flagInvalid),
'Last': bool(flagLast),
'DMAHalted': bool(flagDMAHalted),
'ForcePost': bool(flagForcePost),
'TimeStamp': tsl,
'BufferLength': frame.Length,
'Depth': 8
}
except Queue.Full:
logging.debug('Queue full')
pass
finally:
ret = self.__cam.PutFrame(frame)
if ret != fg.FCE_NOERROR:
raise AVTCameraError(ret)
self.__cam.StopDevice()
self.__cam.CloseCapture()
return snapshotData
def frameMonitor():
for cnt in xrange(frameCnt):
if self.__stopFlag:
break
frame = fg.FGFRAME()
timeout = 1000
ret = self.__cam.GetFrame(frame, timeout)
if ret == fg.FCE_NOERROR:
try:
w = rc[2]
h = rc[3]
flagInvalid = frame.Flags & fg.FGF_INVALID
flagLast = frame.Flags & fg.FGF_LAST
flagDMAHalted = frame.Flags & fg.FGF_DMAHALTED
flagForcePost = frame.Flags & fg.FGF_FORCEPOST
tsh = frame.RxTime.High
tsl = frame.RxTime.Low
if self.deinterlace is None:
# No deinterlace
rawData = fg.cdata(frame.pData, frame.Length)
else:
rawData = fg.Deinterlace(frame, self.deinterlace,
w, h, w, w * h)
self.__imageCache.put_nowait({
'RawData':
rawData,
'ROI':
rc,
'FrameId':
frame.Id,
'Invalid':
bool(flagInvalid),
'Last':
bool(flagLast),
'DMAHalted':
bool(flagDMAHalted),
'ForcePost':
bool(flagForcePost),
'TimeStamp':
tsh * 2**32 + tsl,
'BufferLength':
frame.Length,
'Depth':
8
})
except Queue.Full:
# logging.debug('Queue full')
pass
finally:
ret = self.__cam.PutFrame(frame)
if ret != fg.FCE_NOERROR:
raise AVTCameraError(ret)
else:
raise AVTCameraError(ret)