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demux_mkv: allow 0 sized packets 

Fixes some obscure sample that uses fixed size laces with 0-sized lace
size. Some broken shit. (Maybe the decoder wouldn't care about these
packets, but the demuxer attempted to resync after these packet reading
errors, even though they were perfectly recoverable. But I don't care
enough about this.)

Sample link: https://samples.ffmpeg.org/Matroska/switzler084d_dl.mkv
This commit is contained in:
wm4 2017-11-06 17:12:58 +01:00
parent 7334d93b30
commit e598b19dad
1 changed files with 1 additions and 1 deletions
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2
demux/demux_mkv.c
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@ -2515,7 +2515,7 @@ static int read_block(demuxer_t *demuxer, int64_t end, struct block_info *block)
uint8_t c2 = stream_read_char(s);
time = c1 << 8 | c2;
if (stream_tell(s) + 2 >= endpos)
if (stream_tell(s) + 2 > endpos)
goto exit;
uint8_t header_flags = stream_read_char(s);