Add 'CAN-binder/libs/openxc-message-format/' from commit 'd9f54f97578429773421abce98d5f6579717afcc'

git-subtree-dir: CAN-binder/libs/openxc-message-format
git-subtree-mainline: f44a5b1549bc4c8a84d0dedf4a8b1e4220a34f42
git-subtree-split: d9f54f97578429773421abce98d5f6579717afcc

2 files changed, 97 insertions, 0 deletions

diff --git a/CAN-binder/libs/openxc-message-format/benchmark/proto/.gitignore b/CAN-binder/libs/openxc-message-format/benchmark/proto/.gitignore
new file mode 100644
index 00000000..0520d7d2
--- /dev/null
+++ b/CAN-binder/libs/openxc-message-format/benchmark/proto/.gitignore
@@ -0,0 +1 @@
+*_pb2.py
diff --git a/CAN-binder/libs/openxc-message-format/benchmark/proto/compare_sizes.py b/CAN-binder/libs/openxc-message-format/benchmark/proto/compare_sizes.py
new file mode 100755
index 00000000..0ed445fd
--- /dev/null
+++ b/CAN-binder/libs/openxc-message-format/benchmark/proto/compare_sizes.py
@@ -0,0 +1,96 @@
+#!/usr/bin/env python
+
+from __future__ import division
+import sys
+import numbers
+
+import openxc_pb2
+import json
+
+def sizeof_fmt(num):
+    for unit in ['bytes', 'KB', 'MB', 'GB', 'TB']:
+        if num < 1024.0:
+            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
+total_translated_binary_size = 0
+
+for trace_file in sys.argv[1:]:
+    for line in open(trace_file):
+        try:
+            json_message = json.loads(line)
+        except ValueError:
+            continue
+
+        del json_message['timestamp']
+
+        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(json.dumps(json_message))
+            message.type = openxc_pb2.VehicleMessage.RAW
+            message.raw_message.message_id = json_message['id']
+            message.raw_message.data = int(json_message['data'], 0)
+            total_raw_binary_size += len(message.SerializeToString())
+        else:
+            message.type = openxc_pb2.VehicleMessage.TRANSLATED
+            message.translated_message.name = json_message['name']
+            if 'event' in json_message:
+                message.translated_message.string_value = json_message['value']
+                if isinstance(json_message['event'], bool):
+                    message.translated_message.type = openxc_pb2.TranslatedMessage.EVENTED_BOOL
+                    message.translated_message.boolean_event = json_message['event']
+                elif isinstance(json_message['event'], numbers.Number):
+                    message.translated_message.type = openxc_pb2.TranslatedMessage.EVENTED_NUM
+                    message.translated_message.numeric_value = json_message['event']
+                else:
+                    message.translated_message.type = openxc_pb2.TranslatedMessage.EVENTED_STRING
+                    message.translated_message.string_value = json_message['event']
+            else:
+                if isinstance(json_message['value'], bool):
+                    message.translated_message.type = openxc_pb2.TranslatedMessage.BOOL
+                    message.translated_message.boolean_value = json_message['value']
+                elif isinstance(json_message['value'], numbers.Number):
+                    message.translated_message.type = openxc_pb2.TranslatedMessage.NUM
+                    message.translated_message.numeric_value = json_message['value']
+                else:
+                    message.translated_message.type = openxc_pb2.TranslatedMessage.STRING
+                    message.translated_message.string_value = json_message['value']
+            total_translated_json_size += len(json.dumps(json_message))
+            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" %
+        sizeof_fmt(total_translated_json_size))
+print("Total transferred translated binary size is %s" %
+        sizeof_fmt(total_translated_binary_size))
+
+total_json_size = total_raw_json_size + total_translated_json_size
+print("Total transferred JSON size is %s" % sizeof_fmt(total_json_size))
+total_binary_size = total_raw_binary_size + total_translated_binary_size
+print("Total transferred binary size is %s" % sizeof_fmt(total_binary_size))
+
+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)))