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Code Issues Releases Activity

lavc/tak: do not store invalid values in stream info

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When tak_get_nb_samples() fails, it will currently write
AVERROR_INVALIDDATA as TAKStreamInfo.frame_samples. The parser will then
use this negative value as a frame duration, which leads to various
breakage.

Avoid this by returning the error code from tak_parse_streaminfo()
directly; never store negative values in the parsed header.
This commit is contained in:
Anton Khirnov 2023-05-04 20:45:03 +02:00
parent ecdf1ac267
commit a59b4ac713
1 changed files with 13 additions and 7 deletions
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20
libavcodec/tak.c
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@ -92,10 +92,10 @@ int ff_tak_check_crc(const uint8_t *buf, unsigned int buf_size)
return 0;
}
static void tak_parse_streaminfo(TAKStreamInfo *s, GetBitContext *gb)
static int tak_parse_streaminfo(TAKStreamInfo *s, GetBitContext *gb)
{
uint64_t channel_mask = 0;
int frame_type, i;
int frame_type, i, ret;
s->codec = get_bits(gb, TAK_ENCODER_CODEC_BITS);
skip_bits(gb, TAK_ENCODER_PROFILE_BITS);
@ -124,7 +124,13 @@ static void tak_parse_streaminfo(TAKStreamInfo *s, GetBitContext *gb)
}
s->ch_layout = channel_mask;
s->frame_samples = tak_get_nb_samples(s->sample_rate, frame_type);
ret = tak_get_nb_samples(s->sample_rate, frame_type);
if (ret < 0)
return ret;
s->frame_samples = ret;
return 0;
}
int avpriv_tak_parse_streaminfo(TAKStreamInfo *s, const uint8_t *buf, int size)
@ -135,9 +141,7 @@ int avpriv_tak_parse_streaminfo(TAKStreamInfo *s, const uint8_t *buf, int size)
if (ret < 0)
return AVERROR_INVALIDDATA;
tak_parse_streaminfo(s, &gb);
return 0;
return tak_parse_streaminfo(s, &gb);
}
int ff_tak_decode_frame_header(AVCodecContext *avctx, GetBitContext *gb,
@ -159,7 +163,9 @@ int ff_tak_decode_frame_header(AVCodecContext *avctx, GetBitContext *gb,
}
if (ti->flags & TAK_FRAME_FLAG_HAS_INFO) {
tak_parse_streaminfo(ti, gb);
int ret = tak_parse_streaminfo(ti, gb);
if (ret < 0)
return ret;
if (get_bits(gb, 6))
skip_bits(gb, 25);