FlyCapture2_Camera-bugfixes: Add automatic configuration of packet size for GigE cameras.

Device will now automatically set to the largest possible packet size available
on the network. If Jumbo Frames are not available, print a warning. This also
prints what the packet size is set to if it is changed.

Author: dihm

FlyCapture2Camera/blacs_workers.py

@@ -60,6 +60,29 @@ def __init__(self, serial_number):
         self.pixel_formats = IntEnum('pixel_formats',fmts)
 
         self._abort_acquisition = False
+        
+        # check if GigE camera. If so, ensure max packet size is used
+        cam_info = self.camera.getCameraInfo()
+        if cam_info.interfaceType == PyCapture2.INTERFACE_TYPE.GIGE:
+            # open second GigE interface to camera with GigE config functions
+            gige_camera = PyCapture2.GigECamera()
+            gige_camera.connect(bus.getCameraFromSerialNumber(serial_number))
+            mtu = gige_camera.discoverGigEPacketSize()
+            if mtu <= 1500:
+                msg = """Maximum Transmission Unit (MTU) for ethernet NIC 
+                FlyCapture2_Camera '%s' is connected to is only %d. Reliable
+                operation not expected. Please enable Jumbo frames on NIC."""
+                print(dedent(msg%(self.device_name,mtu)))
+            
+            gige_pkt_size = gige_camera.getGigEProperty(PyCapture2.GIGE_PROPERTY_TYPE.GIGE_PACKET_SIZE)
+            # only set if not already at correct value
+            if gige_pkt_size.value != mtu:
+                gige_pkt_size.value = mtu
+                gige_camera.setGigEProperty(PyCapture2.GIGE_PROPERTY_TYPE.GIGE_PACKET_SIZE)
+                print('Packet size set to %d'%mtu)
+            
+            # close second handle to camera
+            gige_camera.disconnect()
 
     def set_attributes(self, attr_dict):
         """Sets all attribues in attr_dict.