mirror of
https://github.com/storytold/effectcraft.git
synced 2026-11-07 11:01:36 +00:00
Valentin Klein
bb78d55825
Add After Effects project import with bounded parsing, explicit loss reports, and regression coverage. Fetch the cleaned external test corpus at commit 97262276f625afdeeb61787e4cbb74b3f17af510 and verify each fixture against the pinned SHA-256 manifest.
73 lines
2.2 KiB
Python
73 lines
2.2 KiB
Python
# Byte edits of the text family (the old fixtures 732 and 733 are 517 with one paragraph slot
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# changed in the file; AE scripting cannot set those slots). Finds the comp item by name, then
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# the text document (LIST btdk) of its layer, and makes the same one-byte edit there.
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# Usage: patch-text.py <in.aep> <out.aep>
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import struct, sys
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EDITS = {
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"732-text-box-byteedit-para24-0": (b"/23 true /24 1 /25", b"/23 true /24 0 /25"),
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"733-text-box-byteedit-para35-0": (b"/34 0 /35 1 /36", b"/34 0 /35 0 /36"),
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}
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src, dst = sys.argv[1], sys.argv[2]
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d = bytearray(open(src, "rb").read())
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assert d[:4] == b"RIFX" and d[8:12] == b"Egg!"
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def chunks(start, end):
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"""(id, list type or None, body start, body end) of the chunks in [start, end)."""
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p = start
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while p + 8 <= end:
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cid = bytes(d[p:p + 4])
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size = struct.unpack(">I", d[p + 4:p + 8])[0]
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body = p + 8
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if cid == b"LIST":
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yield cid, bytes(d[body:body + 4]), body + 4, body + size
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else:
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yield cid, None, body, body + size
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p = body + size + (size & 1)
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def walk_items(start, end, out):
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for cid, ltype, b, e in chunks(start, end):
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if cid != b"LIST" or ltype == b"btdk":
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continue
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if ltype == b"Item":
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name = None
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for c2, _, b2, e2 in chunks(b, e):
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if c2 == b"Utf8":
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name = bytes(d[b2:e2]).decode("utf-8", "replace")
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break
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out.append((name, b, e))
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walk_items(b, e, out)
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def btdks(start, end, out):
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for cid, ltype, b, e in chunks(start, end):
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if cid == b"LIST" and ltype == b"btdk":
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out.append((b, e))
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elif cid == b"LIST":
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btdks(b, e, out)
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items = []
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walk_items(12, len(d), items)
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done = 0
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for name, b, e in items:
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if name not in EDITS:
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continue
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old, new = EDITS[name]
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docs = []
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btdks(b, e, docs)
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assert len(docs) == 1, (name, len(docs))
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db, de = docs[0]
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body = bytes(d[db:de])
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n = body.count(old)
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assert n == 1, (name, n)
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at = db + body.index(old)
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d[at:at + len(old)] = new
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print(name, "patched at", at)
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done += 1
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assert done == len(EDITS), done
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open(dst, "wb").write(bytes(d))
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