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#!/usr/bin/python
# --------------------------------------------------------------------------
# ***** BEGIN GPL LICENSE BLOCK *****
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software Foundation,
# Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#
# ***** END GPL LICENCE BLOCK *****
# --------------------------------------------------------------------------
import struct
# In Blender, selecting scenes in the databrowser (shift+f4) will tag for rendering.
# This struct wont change according to ton.
# Note that the size differs on 32/64bit
'''
typedef struct BHead {
int code, len;
void *old;
int SDNAnr, nr;
} BHead;
'''
def read_blend_rend_chunk(path):
file = open(path, 'rb')
if file.read(len('BLENDER')) != 'BLENDER':
return []
#
if file.read(1) == '-':
is64bit = True
else: # '_'
is64bit = False
if file.read(1) == 'V':
isBigEndian = True # ppc
else: # 'V'
isBigEndian = False # x86
# Now read the bhead chunk!!!
file.read(3) # skip the version
scenes = []
while file.read(4) == 'REND':
if is64bit: sizeof_bhead = sizeof_bhead_left = 24 # 64bit
else: sizeof_bhead = sizeof_bhead_left = 20 # 32bit
sizeof_bhead_left -= 4
if isBigEndian: rend_length = struct.unpack('>i', file.read(4))[0]
else: rend_length = struct.unpack('<i', file.read(4))[0]
sizeof_bhead_left -= 4
# We dont care about the rest of the bhead struct
file.read(sizeof_bhead_left)
# Now we want the scene name, start and end frame. this is 32bites long
if isBigEndian: start_frame, end_frame = struct.unpack('>2i', file.read(8))
else: start_frame, end_frame = struct.unpack('<2i', file.read(8))
scene_name = file.read(24)
scene_name = scene_name[ : scene_name.index('\0') ]
scenes.append( (start_frame, end_frame, scene_name) )
return scenes
def main():
import sys
for arg in sys.argv[1:]:
if arg.lower().endswith('.blend'):
print read_blend_rend_chunk(arg)
if __name__ == '__main__':
main()
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