def resetCams(self, curTime, cameras, table):
resetEndTime = curTime
for camera in cameras:
exposureStart = max(curTime,
self.getTimeWhenCameraCanExpose(table, camera))
# Cameras that have a pre-set exposure time can only use that
# exposure time for clearing the sensor, hence why we take the
# maximum of the min exposure time and the current exposure time.
# \todo Is it possible for getExposureTime() to be less than
# getMinExposureTime()? That would be a bug, right?
minExposureTime = max(decimal.Decimal('.1'),
camera.getMinExposureTime(isExact=True),
camera.getExposureTime(isExact=True))
exposureMode = camera.getExposureMode()
if exposureMode == cockpit.handlers.camera.TRIGGER_AFTER:
table.addToggle(exposureStart + minExposureTime, camera)
elif exposureMode == cockpit.handlers.camera.TRIGGER_DURATION:
table.addAction(exposureStart, camera, True)
table.addAction(exposureStart + minExposureTime, camera, False)
else: # TRIGGER_BEFORE case
table.addToggle(exposureStart, camera)
resetEndTime = max(resetEndTime, exposureStart + minExposureTime)
self.cameraToImageCount[camera] += 1
self.cameraToIgnoredImageIndices[camera].add(
self.cameraToImageCount[camera])
self.cameraToIsReady[camera] = True
return resetEndTime + decimal.Decimal('1e-6')
def getTimeWhenCameraCanExpose(self, table, camera):
lastUseTime, action = table.getLastActionFor(camera)
if lastUseTime is None:
# No actions yet; assume camera is ready at the start of the
# experiment.
return 0
nextUseTime = lastUseTime
if camera.getExposureMode() == cockpit.handlers.camera.TRIGGER_BEFORE:
# The camera actually finished exposing (and started reading
# out) some time after lastUseTime, depending on its declared
# exposure time.
nextUseTime += camera.getExposureTime(isExact=True)
nextUseTime += self.cameraToReadoutTime[camera] + decimal.Decimal(0.1)
return nextUseTime