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avformat/av1dec: fix setting AVPacket->pos in Annex-B demuxer

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This demuxers reads encapsulation bytes before reading codec data into the
output packets, so take such offset into consideration.

Signed-off-by: James Almer <jamrial@gmail.com>
This commit is contained in:
James Almer
2025-04-28 18:48:01 -03:00
parent 707c04fe06
commit 8ebccdf2a4
1 changed files with 8 additions and 0 deletions
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8
libavformat/av1dec.c
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@ -36,6 +36,7 @@ typedef struct AV1DemuxContext {
AVRational framerate;
uint32_t temporal_unit_size;
uint32_t frame_unit_size;
int64_t pos;
} AV1DemuxContext;
//return < 0 if we need more data
@ -96,6 +97,8 @@ static int av1_read_header(AVFormatContext *s)
if (ret < 0)
return ret;
c->pos = avio_tell(s->pb);
return 0;
}
@ -224,6 +227,7 @@ static int annexb_read_packet(AVFormatContext *s, AVPacket *pkt)
{
AV1DemuxContext *const c = s->priv_data;
uint32_t obu_unit_size;
int64_t pos = c->pos;
int ret, len;
retry:
@ -234,6 +238,7 @@ retry:
}
if (!c->temporal_unit_size) {
c->pos = avio_tell(s->pb);
len = leb(s->pb, &c->temporal_unit_size, 1);
if (len == AVERROR_EOF) goto end;
else if (len < 0) return len;
@ -279,6 +284,9 @@ end:
if (ret == AVERROR(EAGAIN))
goto retry;
if (!ret)
pkt->pos = pos;
return ret;
}