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[ffmdec] Check return value of avio_seek and avoid modifying state if it fails

This commit is contained in:
Joakim Plate 2011-09-14 19:24:55 +02:00
parent 1df00ac80f
commit 928cfc7e4f
1 changed files with 4 additions and 3 deletions
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7
libavformat/ffmdec.c
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@ -171,7 +171,7 @@ static int ffm_read_data(AVFormatContext *s,
/* ensure that acutal seeking happens between FFM_PACKET_SIZE
and file_size - FFM_PACKET_SIZE */
static void ffm_seek1(AVFormatContext *s, int64_t pos1)
static int64_t ffm_seek1(AVFormatContext *s, int64_t pos1)
{
FFMContext *ffm = s->priv_data;
AVIOContext *pb = s->pb;
@ -180,7 +180,7 @@ static void ffm_seek1(AVFormatContext *s, int64_t pos1)
pos = FFMIN(pos1, ffm->file_size - FFM_PACKET_SIZE);
pos = FFMAX(pos, FFM_PACKET_SIZE);
av_dlog(s, "seek to %"PRIx64" -> %"PRIx64"\n", pos1, pos);
avio_seek(pb, pos, SEEK_SET);
return avio_seek(pb, pos, SEEK_SET);
}
static int64_t get_dts(AVFormatContext *s, int64_t pos)
@ -506,7 +506,8 @@ static int ffm_seek(AVFormatContext *s, int stream_index, int64_t wanted_pts, in
pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
found:
ffm_seek1(s, pos);
if (ffm_seek1(s, pos) < 0)
return -1;
/* reset read state */
ffm->read_state = READ_HEADER;