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PICARD-2411: Fix Flac SeekPoints creation with missing SeekTable

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With this patch if the SeekTable is gone or empty,
we try to recreate it using SeekPoints with a step of 4096 samples
If that's not possible we remove SeekTable at all.
This commit is contained in:
Marcin Szalowicz
2022-02-08 20:57:24 +01:00
committed by Philipp Wolfer
parent d34df0049c
commit 11c405fd17
1 changed files with 31 additions and 5 deletions
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36
picard/formats/vorbis.py
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@@ -29,6 +29,7 @@
import base64
import math
import re
import mutagen.flac
@@ -249,12 +250,37 @@ class VCommentFile(File):
file.clear_pictures()
tags = {}
if is_flac and config.setting["fix_missing_seekpoints_flac"]:
if len(file.seektable.seekpoints) == 0:
if file.info.total_samples > 0:
file.seektable.seekpoints = [mutagen.flac.SeekPoint(0, 0, 1)]
if not file.seektable:
seektable = mutagen.flac.SeekTable(None)
else:
seektable = file.seektable
if len(seektable.seekpoints) == 0:
if file.info.total_samples > 0 and math.floor(file.info.length) > 0:
# We try to regenerate the seektable using 4096 samples as a step
# the seekpoint is start pos, end pos, step sample
prev = None
SEEK_SIZE = 4096
for i in range(math.floor(file.info.total_samples / SEEK_SIZE)):
if prev is None:
prev = 0
continue
seektable.seekpoints.append(mutagen.flac.SeekPoint(prev * SEEK_SIZE, i * SEEK_SIZE, SEEK_SIZE))
prev = i
if prev is not None:
seektable.seekpoints.append(mutagen.flac.SeekPoint(prev * SEEK_SIZE, file.info.total_samples, file.info.total_samples - prev * SEEK_SIZE))
elif math.floor(file.info.total_samples / SEEK_SIZE) == 0:
seektable.seekpoints.append(mutagen.flac.SeekPoint(0, file.info.total_samples, file.info.total_samples))
if not file.seektable:
file.seektable = seektable
file.metadata_blocks.append(seektable)
file.seektable.write()
else:
log.error("Unable to fix seektable of file {} because the file has no samples!".format(filename))
elif file.seektable:
file.metadata_blocks = [b for b in file.metadata_blocks if b != file.seektable]
file.seektable = None
for name, value in metadata.items():
if name == '~rating':