8009ff1e47
The expansion process follows pointers and library links to construct the full set of actually-used data blocks. This set consists of all data blocks in the initial blend file, and all *actually linked-to* data blocks in linked blend files. I've also removed non-recursive dependency listing.
40 lines
1.3 KiB
Python
40 lines
1.3 KiB
Python
import typing
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from blender_asset_tracer import cdefs
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from . import BlendFileBlock
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from .dna import FieldPath
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def listbase(block: BlendFileBlock, next_path: FieldPath = b'next') \
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-> typing.Iterator[BlendFileBlock]:
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"""Generator, yields all blocks in the ListBase linked list."""
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while block:
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yield block
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next_ptr = block[next_path]
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block = block.bfile.find_block_from_address(next_ptr)
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def sequencer_strips(sequence_editor: BlendFileBlock) \
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-> typing.Iterator[typing.Tuple[BlendFileBlock, int]]:
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"""Generator, yield all sequencer strip blocks with their type number.
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Recurses into meta strips, yielding both the meta strip itself and the
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strips contained within it.
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See blender_asset_tracer.cdefs.SEQ_TYPE_xxx for the type numbers.
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"""
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def iter_seqbase(seqbase) -> typing.Iterator[BlendFileBlock]:
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for seq in listbase(seqbase):
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seq.refine_type(b'Sequence')
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seq_type = seq[b'type']
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yield seq, seq_type
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if seq_type == cdefs.SEQ_TYPE_META:
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# Recurse into this meta-sequence.
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subseq = seq.get_pointer((b'seqbase', b'first'))
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yield from iter_seqbase(subseq)
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sbase = sequence_editor.get_pointer((b'seqbase', b'first'))
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yield from iter_seqbase(sbase)
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