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skip top-level objects to search for the simple index in ASF files

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Originally committed as revision 25863 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Stefan Gehrer 2010-12-03 07:49:07 +00:00
parent 037be76e15
commit 77b7c334be
1 changed files with 14 additions and 1 deletions
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15
libavformat/asfdec.c
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@ -1138,7 +1138,20 @@ static void asf_build_simple_index(AVFormatContext *s, int stream_index)
url_fseek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
get_guid(s->pb, &g);
if (!guidcmp(&g, &index_guid)) {
/* the data object can be followed by other top-level objects,
skip them until the simple index object is reached */
while (guidcmp(&g, &index_guid)) {
int64_t gsize= get_le64(s->pb);
if (gsize < 24 || url_feof(s->pb)) {
url_fseek(s->pb, current_pos, SEEK_SET);
return;
}
url_fseek(s->pb, gsize-24, SEEK_CUR);
get_guid(s->pb, &g);
}
{
int64_t itime, last_pos=-1;
int pct, ict;
int64_t av_unused gsize= get_le64(s->pb);