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cafdec: Check return value of avio_seek and avoid modifying state if it fails

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Signed-off-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Justin Ruggles <justin.ruggles@gmail.com>
This commit is contained in:
Joakim Plate 2012-02-10 18:47:53 +00:00 committed by Justin Ruggles
parent b69c2e0e6d
commit af701d42c3
1 changed files with 12 additions and 7 deletions
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19
libavformat/cafdec.c
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@ -358,7 +358,7 @@ static int read_seek(AVFormatContext *s, int stream_index,
{
AVStream *st = s->streams[0];
CaffContext *caf = s->priv_data;
int64_t pos;
int64_t pos, packet_cnt, frame_cnt;
timestamp = FFMAX(timestamp, 0);
@ -367,17 +367,22 @@ static int read_seek(AVFormatContext *s, int stream_index,
pos = caf->bytes_per_packet * timestamp / caf->frames_per_packet;
if (caf->data_size > 0)
pos = FFMIN(pos, caf->data_size);
caf->packet_cnt = pos / caf->bytes_per_packet;
caf->frame_cnt = caf->frames_per_packet * caf->packet_cnt;
packet_cnt = pos / caf->bytes_per_packet;
frame_cnt = caf->frames_per_packet * packet_cnt;
} else if (st->nb_index_entries) {
caf->packet_cnt = av_index_search_timestamp(st, timestamp, flags);
caf->frame_cnt = st->index_entries[caf->packet_cnt].timestamp;
pos = st->index_entries[caf->packet_cnt].pos;
packet_cnt = av_index_search_timestamp(st, timestamp, flags);
frame_cnt = st->index_entries[packet_cnt].timestamp;
pos = st->index_entries[packet_cnt].pos;
} else {
return -1;
}
avio_seek(s->pb, pos + caf->data_start, SEEK_SET);
if (avio_seek(s->pb, pos + caf->data_start, SEEK_SET) < 0)
return -1;
caf->packet_cnt = packet_cnt;
caf->frame_cnt = frame_cnt;
return 0;
}