return "%3.1f%s" % (num, unit)
num /= 1024.0
+total_raw_can_size = 0
total_raw_json_size = 0
total_raw_binary_size = 0
total_translated_json_size = 0
except ValueError:
continue
+ message = openxc_pb2.VehicleMessage()
+
if 'id' and 'data' in json_message:
+ # rough approx. that CAN messages are 10 bytes - they could be less
+ # but most of ours are full 64+11 bits
+ total_raw_can_size += 10
total_raw_json_size += len(line)
binary_message = openxc_pb2.RawMessage()
binary_message.message_id = json_message['id']
binary_message.data = int(json_message['data'], 0)
- total_raw_binary_size += len(binary_message.SerializeToString())
+ message.type = openxc_pb2.VehicleMessage.RAW
+ message.raw_message = binary_message
+ total_raw_binary_size += len(message.SerializeToString())
else:
+ message.type = openxc_pb2.VehicleMessage.TRANSLATED
+ message.translated_message.name = json_message['name']
if isinstance(json_message['value'], bool):
- binary_message = openxc_pb2.TranslatedBooleanMessage()
+ message.translated_message.boolean_value = json_message['value']
elif isinstance(json_message['value'], numbers.Number):
- binary_message = openxc_pb2.TranslatedNumericMessage()
+ message.translated_message.numerical_value = json_message['value']
else:
- binary_message = openxc_pb2.TranslatedStringMessage()
- binary_message.name = json_message['name']
- binary_message.value = json_message['value']
+ message.translated_message.string_value = json_message['value']
total_translated_json_size += len(line)
- total_translated_binary_size += len(binary_message.SerializeToString())
+ total_translated_binary_size += len(message.SerializeToString())
print("For the %d trace files given..." % len(sys.argv[1:]))
+print("Total transferred raw CAN size is %s" % sizeof_fmt(total_raw_can_size))
print("Total transferred raw JSON size is %s" % sizeof_fmt(total_raw_json_size))
print("Total transferred raw binary size is %s" % sizeof_fmt(total_raw_binary_size))
print("Total transferred translated JSON size is %s" %
total_binary_size = total_raw_binary_size + total_translated_binary_size
print("Total transferred binary size is %s" % sizeof_fmt(total_binary_size))
-print("Binary encoding is %f%% smaller than JSON for raw messages" % (
- 100 - (total_raw_binary_size / total_raw_json_size * 100)))
-print("Binary encoding is %f%% smaller than JSON for translated messages" % (
- 100 - (total_translated_binary_size / total_translated_json_size * 100)))
+if total_raw_can_size > 0:
+ print("Binary encoding adds %f%% overhead to raw CAN messages" % (
+ total_raw_binary_size / total_raw_can_size * 100 - 100))
+ print("JSON encoding adds %f%% overhead to raw CAN messages" % (
+ total_raw_json_size / total_raw_can_size * 100 - 100))
+if total_raw_json_size > 0:
+ print("Binary encoding is %f%% smaller than JSON for raw messages" % (
+ 100 - (total_raw_binary_size / total_raw_json_size * 100)))
+if total_translated_json_size > 0:
+ print("Binary encoding is %f%% smaller than JSON for translated messages" % (
+ 100 - (total_translated_binary_size / total_translated_json_size * 100)))
print("Binary encoding is %f%% smaller than JSON overall" % (
100 - (total_binary_size / total_json_size * 100)))