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tmpz23 2023-04-13 09:34:32 +02:00 committed by GitHub
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1 changed files with 27 additions and 11 deletions
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38
mottool/mottool.py
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@ -4,7 +4,7 @@ import logging
from pathlib import Path
__version__ = "0.0.19"
__version__ = "0.0.20"
__author__ = "rigodron, algoflash, GGLinnk, CrystalPixel"
__license__ = "MIT"
__status__ = "developpement"
@ -22,32 +22,38 @@ def align(offset:int, align:int):
class MotFile:
"Unpack and pack motions in the motFile."
"Unpack and pack groups of motions in the motFile."
__groups_offsets = None
__GROUPS_HEADER_LEN = 0x40
__TOTAL_HEADER_ALIGN = 0x20
__MOTION_FILE_ALIGN = 0x20
def unpack(self, motfile_path:Path, folder_path:Path):
""
"""
Unpack read the global groups_header and each group_header to unpack group and theirs motions in theirs folders.
* groups_header has a fixed length of 0x20
* each group_header is -1 terminated and the all header block is aligned to 0x20
* each motion file is aligned to 0x20
"""
logging.info(f"Unpacking {motfile_path} in {folder_path}...")
self.__groups_offsets = []
with motfile_path.open("rb") as motfile_file:
self.__groups_offsets = []
for _ in range(self.__GROUPS_HEADER_LEN // 4):
group_offset = int.from_bytes(motfile_file.read(4), "big")
self.__groups_offsets.append(group_offset)
group_header_offset = int.from_bytes(motfile_file.read(4), "big")
self.__groups_offsets.append(group_header_offset)
folder_path.mkdir(parents=True)
logging.debug(f"Total of groups: {len(self.__groups_offsets):02}")
for group_index, group_offset in enumerate(self.__groups_offsets):
if group_offset == 0:
for group_index, group_header_offset in enumerate(self.__groups_offsets):
# For each non-empty group we create theirs folder with theirs 2 digits index name.
if group_header_offset == 0:
continue
group_path = folder_path / f"{group_index:02}"
group_path.mkdir()
# Now we read the group_header and put all motions offsets in a list.
motions_offsets = []
motfile_file.seek(group_offset)
motfile_file.seek(group_header_offset)
last_motion_offset = int.from_bytes(motfile_file.read(4), "big")
while last_motion_offset != -1:
@ -57,25 +63,34 @@ class MotFile:
for motion_index, motion_offset in enumerate(motions_offsets):
logging.debug(f"[unpacking] group: {group_index:02} motion: {motion_index:04}")
# Now we extract each motion at theirs offsets for the current group.
# We just create an empty file for null offsets to keep ending empty motion offsets in the group_header for repack.
new_motion_path = (group_path / f"{motion_index:04}").with_suffix(".mot")
if motion_offset == 0:
# We create an empty file.
new_motion_path.touch()
continue
# The first uint32 of motion is the motion total length
motfile_file.seek(motion_offset)
motionfile_len = int.from_bytes(motfile_file.read(4), "big")
motfile_file.seek(motion_offset)
new_motion_path.write_bytes( motfile_file.read(motionfile_len) )
def pack(self, folder_path:Path, motfile_path:Path):
""
"Pack create the header and then pack files following to it."
logging.info(f"Packing {folder_path} in {motfile_path}...")
# At first we have to count motions for each groups for creating and add length of -1 to the end of each group_header for aligning the header to 0x20 and get the first file offset.
# Then with the first file offset we can populate each group_header
# groups_count is the last folder index because groups_header can contains empty offsets.
groups_count = int(list(folder_path.glob("*"))[-1].name) + 1
group_motion_len_list = [[]] * groups_count
# group_motion_len_list contains a list of groups with a list of motions in each and the length of motion for each [group_index][motion_index].
# groups are initialized with empty list to track empty groups using len()
for group_index in range(groups_count):
# test if the group is empty
if not (folder_path / f"{group_index:02}").is_dir():
continue
motions_count = len(list((folder_path / f"{group_index:02}").glob("*")))
@ -87,6 +102,7 @@ class MotFile:
group_motion_len_list[group_index][motion_index] = (folder_path / f"{group_index:02}" / f"{motion_index:04}").with_suffix(".mot").stat().st_size
logging.debug(f"group: {group_index:02} motion: {motion_index:04} len: {group_motion_len_list[group_index][motion_index]:08x}")
# We create groups_header with 0x20 fixed length.
current_offset = self.__GROUPS_HEADER_LEN
motfile_headers_data = b""