What do pad and u_data mean?

natukage405 · May 18, 2020, 10:47am

What is in deepstream_test_1.py’s u_data and pad?
Also, how do I retrieve the data inside?

NVIDIA-AI-IOT/deepstream_python_apps/blob/master/apps/deepstream-test1/deepstream_test_1.py#L41


      
          PGIE_CLASS_ID_BICYCLE = 1
          PGIE_CLASS_ID_PERSON = 2
          PGIE_CLASS_ID_ROADSIGN = 3
          
          

          
def osd_sink_pad_buffer_probe(pad,info,u_data):
              frame_number=0
              #Intiallizing object counter with 0.
              obj_counter = {
                  PGIE_CLASS_ID_VEHICLE:0,
                  PGIE_CLASS_ID_PERSON:0,
                  PGIE_CLASS_ID_BICYCLE:0,
                  PGIE_CLASS_ID_ROADSIGN:0
              }
              num_rects=0
          
          
    gst_buffer = info.get_buffer()
              if not gst_buffer:
                  print("Unable to get GstBuffer ")
                  return

bcao · May 19, 2020, 2:53am

pls refer Probes GstPadProbeCallback type.