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Text cleanup/red policing

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This commit is contained in:
Jamie Hardt
2023-11-08 19:21:47 -08:00
parent 86a4edc983
commit 4f51584fe9
3 changed files with 37 additions and 21 deletions
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15
wavinfo/wave_bext_reader.py
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@@ -8,17 +8,20 @@ class WavBextReader:
"""
Read Broadcast-WAV extended metadata.
:param bext_data: The bytes-like data.
:param encoding: The encoding to use when decoding the text fields of the
BEXT metadata scope. According to EBU Rec 3285 this shall be ASCII.
:param encoding: The encoding to use when decoding the text fields of
the BEXT metadata scope. According to EBU Rec 3285 this shall be
ASCII.
"""
packstring = "<256s" + "32s" + "32s" + "10s" + "8s" + "QH" + "64s" + "hhhhh" + "180s"
packstring = "<256s" + "32s" + "32s" + "10s" + "8s" + "QH" + "64s" + \
"hhhhh" + "180s"
rest_starts = struct.calcsize(packstring)
unpacked = struct.unpack(packstring, bext_data[:rest_starts])
def sanitize_bytes(b : bytes) -> str:
# honestly can't remember why I'm stripping nulls this way
first_null = next((index for index, byte in enumerate(b) if byte == 0), None)
first_null = next((index for index, byte in enumerate(b) \
if byte == 0), None)
trimmed = b if first_null is None else b[:first_null]
decoded = trimmed.decode(encoding)
return decoded
@@ -50,8 +53,8 @@ class WavBextReader:
#: BEXT version.
self.version : int = unpacked[6]
#: SMPTE 330M UMID of this audio file, 64 bytes are allocated though the UMID
#: may only be 32 bytes long.
#: SMPTE 330M UMID of this audio file, 64 bytes are allocated though
#: the UMID may only be 32 bytes long.
self.umid : Optional[bytes] = None
#: EBU R128 Integrated loudness, in LUFS.