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rl_replay_parser.py
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import pprint
import sys
import struct
import math
import bitstring
UINT32 = 'uintle:32'
UINT64 = 'uintle:64'
FLOAT32 = 'floatle:32'
class ReplayParser:
def parse(self, replay_file):
data = {}
# TODO: CRC, version info, other stuff
crc = replay_file.read('bytes:20')
header_start = replay_file.read('bytes:24')
data['header'] = self._read_properties(replay_file)
unknown = replay_file.read('bytes:8')
data['level_info'] = self._read_level_info(replay_file)
data['key_frames'] = self._read_key_frames(replay_file)
data['network_frames'] = self._read_network_frames(replay_file)
data['debug_logs'] = self._read_debug_logs(replay_file)
data['goal_frame_info'] = self._read_goal_frame_infos(replay_file)
data['packages'] = self._read_packages(replay_file)
data['objects'] = self._read_objects(replay_file)
data['names'] = self._read_names(replay_file)
data['class_index'] = self._read_class_index(replay_file)
data['class_net_cache'] = self._read_class_net_cache(replay_file)
return data
def _read_properties(self, replay_file):
results = {}
while True:
property_info = self._read_property(replay_file)
if property_info:
results[property_info['name']] = property_info['value']
else:
return results
def _read_property(self, replay_file):
name_length = replay_file.read(UINT32)
property_name = self._read_string(replay_file, name_length)
if property_name == 'None':
return None
type_length = replay_file.read(UINT32)
type_name = self._read_string(replay_file, type_length)
length_of_data = replay_file.read(UINT64)
if type_name == 'IntProperty':
value = replay_file.read(UINT32)
elif type_name == 'StrProperty':
length = replay_file.read(UINT32)
value = self._read_string(replay_file, length)
elif type_name == 'FloatProperty':
value = replay_file.read(FLOAT32)
elif type_name == 'NameProperty':
length = replay_file.read(UINT32)
value = self._read_string(replay_file, length)
elif type_name == 'ArrayProperty':
array_length = replay_file.read(UINT32)
value = [
self._read_properties(replay_file)
for x in range(array_length)
]
print('{}: {}'.format(property_name, value))
return { 'name' : property_name, 'value': value}
def _read_level_info(self, replay_file):
map_names = []
number_of_maps = replay_file.read(UINT32)
for x in range(number_of_maps):
map_name_length = replay_file.read(UINT32)
map_name = self._read_string(replay_file, map_name_length)
map_names.append(map_name)
return map_names
def _read_key_frames(self, replay_file):
number_of_key_frames = replay_file.read(UINT32)
key_frames = [
self._read_key_frame(replay_file)
for x in range(number_of_key_frames)
]
return key_frames
def _read_key_frame(self, replay_file):
time = replay_file.read(FLOAT32)
frame = replay_file.read(UINT32)
file_position = replay_file.read(UINT32)
return {
'time' : time,
'frame' : frame,
'file_position' : file_position
}
def _read_network_frames(self, replay_file):
stream_byte_length = replay_file.read(UINT32)
# TODO: Figure this out at a later time
replay_file.bytepos += stream_byte_length
def _read_debug_logs(self, replay_file):
log_size = replay_file.read(UINT32)
return [
self._read_debug_log(replay_file)
for x in range(log_size)
]
def _read_debug_log(self, replay_file):
frame = replay_file.read(UINT32)
name_length = replay_file.read(UINT32)
name = self._read_string(replay_file, name_length)
msg_length = replay_file.read(UINT32)
msg = self._read_string(replay_file, msg_length)
return {
'frame': frame,
'name' : name,
'message' : msg
}
def _read_goal_frame_infos(self, replay_file):
number_goal_frame_infos = replay_file.read(UINT32)
return [
self._read_goal_frame_info(replay_file)
for x in range(number_goal_frame_infos)
]
def _read_goal_frame_info(self, replay_file):
type_length = replay_file.read(UINT32)
type_name = self._read_string(replay_file, type_length)
frame_number = replay_file.read(UINT32)
return {
'type' : type_name,
'frame_number': frame_number,
}
def _read_packages(self, replay_file):
number_of_packages = replay_file.read(UINT32)
return [
self._read_package(replay_file)
for x in range(number_of_packages)
]
def _read_package(self, replay_file):
package_length = replay_file.read(UINT32)
return self._read_string(replay_file, package_length)
def _read_objects(self, replay_file):
number_of_objects = replay_file.read(UINT32)
return [
self._read_object(replay_file)
for x in range(number_of_objects)
]
def _read_object(self, replay_file):
object_length = replay_file.read(UINT32)
return self._read_string(replay_file, object_length)
def _read_names(self, replay_file):
number_of_names = replay_file.read(UINT32)
return [
self._read_name(replay_file)
for x in range(number_of_names)
]
def _read_name(self, replay_file):
name_length = replay_file.read(UINT32)
return self._read_string(replay_file, name_length)
def _read_class_index(self, replay_file):
number_of_classes = replay_file.read(UINT32)
return dict(
self._read_class_index_item(replay_file)
for x in range(number_of_classes)
)
def _read_class_index_item(self, replay_file):
class_name_size = replay_file.read(UINT32)
class_name = self._read_string(replay_file, class_name_size)
class_id = replay_file.read(UINT32)
return (class_id, class_name)
def _read_class_net_cache(self, replay_file):
array_length = replay_file.read(UINT32)
return dict(
self._read_class_net_cache_item(replay_file)
for x in range(array_length)
)
def _read_class_net_cache_item(self, replay_file):
# Corresponds to the 'id' value in the class index.
class_id = replay_file.read(UINT32)
# start/end represent range of the corresponding property elements in the
# 'objects' array.
class_index_start = replay_file.read(UINT32)
class_index_end = replay_file.read(UINT32)
length = replay_file.read(UINT32)
data = {
'class_index_start': class_index_start,
'class_index_end': class_index_end,
'properties' : dict(
self._read_class_net_cache_item_property_map(replay_file)
for x in range(length)
)
}
return (class_id, data)
def _read_class_net_cache_item_property_map(self, replay_file):
property_index = replay_file.read(UINT32)
property_mapped_id = replay_file.read(UINT32)
return (property_mapped_id, property_index)
def _pretty_byte_string(self, bytes_read):
return ':'.join(format(ord(x), '#04x') for x in bytes_read)
def _print_bytes(self, bytes_read):
print('Hex read: {}'.format(self._pretty_byte_string(bytes_read)))
def _read_string(self, replay_file, length):
# NOTE(mhildreth): Strip off the final byte, since it will be a zero (null terminator)
return replay_file.read(8 * length).bytes[:-1]
def _sniff_bits(self, replay_file, size):
print('****** Sniff Results *******')
b = replay_file.read(size)
print("Binary: {}".format(b.bin))
if size % 4 == 0:
print("Hex: {}".format(b.hex))
if size >= 8:
print("Int: {}".format(b.intle))
print("Uint: {}".format(b.uintle))
if size in [32, 64]:
print("Float: {}".format(b.floatle))
if __name__ == '__main__':
filename = sys.argv[1]
if not filename.endswith('.replay'):
sys.exit('Filename {} does not appear to be a valid replay file'.format(filename))
with open(filename, 'rb') as replay_file:
replay_bit_stream = bitstring.ConstBitStream(replay_file)
results = ReplayParser().parse(replay_bit_stream)
try:
pprint.pprint(results)
except IOError as e:
pass