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asf: Check return value of more avio_seek calls 

This reduces problems when underlying protocol is not
seekable even if marked as such or if the file has been
cut short.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Joakim Plate 2011-09-12 04:06:55 +02:00 committed by Michael Niedermayer
parent bc851a2946
commit ac1d489320
1 changed files with 7 additions and 3 deletions
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10
libavformat/asfdec.c
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@ -1155,7 +1155,8 @@ static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos,
if (s->packet_size > 0)
pos= (pos+s->packet_size-1-s->data_offset)/s->packet_size*s->packet_size+ s->data_offset;
*ppos= pos;
avio_seek(s->pb, pos, SEEK_SET);
if (avio_seek(s->pb, pos, SEEK_SET) < 0)
return AV_NOPTS_VALUE;
//printf("asf_read_pts\n");
asf_reset_header(s);
@ -1197,7 +1198,9 @@ static void asf_build_simple_index(AVFormatContext *s, int stream_index)
int64_t current_pos= avio_tell(s->pb);
int i;
avio_seek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
if(avio_seek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET) < 0)
return;
ff_get_guid(s->pb, &g);
/* the data object can be followed by other top-level objects,
@ -1269,7 +1272,8 @@ static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int
/* do the seek */
av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
avio_seek(s->pb, pos, SEEK_SET);
if(avio_seek(s->pb, pos, SEEK_SET) < 0)
return -1;
asf_reset_header(s);
return 0;
}