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avcodec/siren: Improve the bits left threshold in decode_envelope()

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Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2021-09-29 00:18:53 +02:00
parent 109113b54f
commit 1ad4782d2a
1 changed files with 1 additions and 1 deletions
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2
libavcodec/siren.c
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@ -447,7 +447,7 @@ static int decode_envelope(SirenContext *s, GetBitContext *gb,
int index = 0;
do {
if (get_bits_left(gb) < 4)
if (get_bits_left(gb) < 4 + number_of_regions - i + s->checksum_bits)
return AVERROR_INVALIDDATA;
index = differential_decoder_tree[i - 1][index][get_bits1(gb)];
} while (index > 0);