128 lines
4.3 KiB
Python
128 lines
4.3 KiB
Python
# ***** 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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#
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# ***** END GPL LICENCE BLOCK *****
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#
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# (c) 2018, Blender Foundation - Sybren A. Stüvel
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"""List count and total size of datablocks in a blend file."""
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import collections
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import logging
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import pathlib
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from blender_asset_tracer import blendfile
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from . import common
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log = logging.getLogger(__name__)
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class BlockTypeInfo:
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def __init__(self):
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self.total_bytes = 0
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self.num_blocks = 0
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self.sizes = []
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self.blocks = []
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self.name = 'unset'
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def add_parser(subparsers):
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"""Add argparser for this subcommand."""
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parser = subparsers.add_parser('blocks', help=__doc__)
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parser.set_defaults(func=cli_blocks)
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parser.add_argument('blendfile', type=pathlib.Path)
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parser.add_argument('-d', '--dump', default=False, action='store_true',
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help='Hex-dump the biggest block')
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def by_total_bytes(info: BlockTypeInfo) -> int:
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return info.total_bytes
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def block_key(block: blendfile.BlendFileBlock) -> str:
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return '%s-%s' % (block.dna_type_name, block.code.decode())
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def cli_blocks(args):
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bpath = args.blendfile
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if not bpath.exists():
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log.fatal('File %s does not exist', args.blendfile)
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return 3
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per_blocktype = collections.defaultdict(BlockTypeInfo)
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print('Opening %s' % bpath)
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bfile = blendfile.BlendFile(bpath)
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print('Inspecting %s' % bpath)
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for block in bfile.blocks:
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if block.code == b'DNA1':
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continue
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index_as = block_key(block)
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info = per_blocktype[index_as]
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info.name = index_as
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info.total_bytes += block.size
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info.num_blocks += 1
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info.sizes.append(block.size)
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info.blocks.append(block)
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fmt = '%-35s %10s %10s %10s %10s'
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print(fmt % ('Block type', 'Total Size', 'Num blocks', 'Avg Size', 'Median'))
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print(fmt % (35 * '-', 10 * '-', 10 * '-', 10 * '-', 10 * '-'))
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infos = sorted(per_blocktype.values(), key=by_total_bytes, reverse=True)
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for info in infos[:10]:
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median_size = sorted(info.sizes)[len(info.sizes) // 2]
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print(fmt % (info.name,
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common.humanize_bytes(info.total_bytes),
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info.num_blocks,
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common.humanize_bytes(info.total_bytes // info.num_blocks),
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common.humanize_bytes(median_size)
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))
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print(70 * '-')
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# From the blocks of the most space-using category, the biggest block.
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biggest_block = sorted(infos[0].blocks,
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key=lambda blck: blck.size,
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reverse=True)[0]
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print('Biggest %s block is %s at address %s' % (
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block_key(biggest_block),
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common.humanize_bytes(biggest_block.size),
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biggest_block.addr_old,
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))
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print('Finding what points there')
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addr_to_find = biggest_block.addr_old
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found_pointer = False
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for block in bfile.blocks:
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for prop_path, prop_value in block.items_recursive():
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if not isinstance(prop_value, int) or prop_value != addr_to_find:
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continue
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print(' ', block, prop_path)
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found_pointer = True
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if not found_pointer:
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print('Nothing points there')
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if args.dump:
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print('Hexdump:')
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bfile.fileobj.seek(biggest_block.file_offset)
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data = bfile.fileobj.read(biggest_block.size)
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line_len_bytes = 32
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import codecs
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for offset in range(0, len(data), line_len_bytes):
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line = codecs.encode(data[offset:offset + line_len_bytes], 'hex').decode()
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print('%6d -' % offset, ' '.join(line[i:i + 2] for i in range(0, len(line), 2)))
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