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avcodec/g729_parser: Check channels

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Fixes: signed integer overflow: 10 * 808464428 cannot be represented in type 'int'
Fixes: assertion failure
Fixes: ticket9651

Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 757da974b2)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2022-02-27 14:43:04 +01:00
parent 061f8b941e
commit e9e2ddbc6c
1 changed files with 3 additions and 0 deletions
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libavcodec/g729_parser.c
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@ -49,6 +49,9 @@ static int g729_parse(AVCodecParserContext *s1, AVCodecContext *avctx,
s->block_size = (avctx->bit_rate < 8000) ? G729D_6K4_BLOCK_SIZE : G729_8K_BLOCK_SIZE;
if (avctx->codec_id == AV_CODEC_ID_ACELP_KELVIN)
s->block_size++;
// channels > 2 is invalid, we pass the packet on unchanged
if (avctx->channels > 2)
s->block_size = 0;
s->block_size *= avctx->channels;
s->duration = avctx->frame_size;
}