103 lines
2.7 KiB
Python
Executable File
103 lines
2.7 KiB
Python
Executable File
#!/usr/bin/python
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# ##### BEGIN GPL LICENSE BLOCK #####
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software Foundation,
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# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#
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# ##### END GPL LICENSE BLOCK #####
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# <pep8 compliant>
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# This module can get render info without running from inside blender.
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#
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# This struct wont change according to Ton.
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# Note that the size differs on 32/64bit
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#
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# typedef struct BHead {
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# int code, len;
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# void *old;
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# int SDNAnr, nr;
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# } BHead;
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def read_blend_rend_chunk(path):
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import struct
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blendfile = open(path, "rb")
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head = blendfile.read(7)
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if head[0:2] == b'\x1f\x8b': # gzip magic
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import gzip
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blendfile.close()
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blendfile = gzip.open(path, "rb")
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head = blendfile.read(7)
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if head != b'BLENDER':
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print("not a blend file:", path)
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blendfile.close()
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return []
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is_64_bit = (blendfile.read(1) == b'-')
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# true for PPC, false for X86
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is_big_endian = (blendfile.read(1) == b'V')
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# Now read the bhead chunk!!!
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blendfile.read(3) # skip the version
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scenes = []
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sizeof_bhead = 24 if is_64_bit else 20
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while blendfile.read(4) == b'REND':
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sizeof_bhead_left = sizeof_bhead - 4
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struct.unpack('>i' if is_big_endian else '<i', blendfile.read(4))[0]
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sizeof_bhead_left -= 4
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# We don't care about the rest of the bhead struct
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blendfile.read(sizeof_bhead_left)
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# Now we want the scene name, start and end frame. this is 32bites long
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start_frame, end_frame = struct.unpack('>2i' if is_big_endian else '<2i', blendfile.read(8))
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scene_name = blendfile.read(64)
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scene_name = scene_name[:scene_name.index(b'\0')]
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try:
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scene_name = str(scene_name, "utf8")
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except TypeError:
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pass
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scenes.append((start_frame, end_frame, scene_name))
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blendfile.close()
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return scenes
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def main():
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import sys
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for arg in sys.argv[1:]:
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if arg.lower().endswith('.blend'):
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for value in read_blend_rend_chunk(arg):
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print("%d %d %s" % value)
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if __name__ == '__main__':
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main()
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