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asfdec: fix parsing of packets that overrun into padding. 

Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
This commit is contained in:
Ronald S. Bultje 2011-04-27 15:42:16 -07:00 committed by Ronald S. Bultje
parent 8ce67bcabe
commit f8b1245922
1 changed files with 8 additions and 2 deletions
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10
libavformat/asfdec.c
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@ -853,8 +853,14 @@ static int asf_read_frame_header(AVFormatContext *s, AVIOContext *pb){
if (asf->packet_flags & 0x01) {
DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
if(asf->packet_frag_size > asf->packet_size_left - rsize){
av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid\n");
return -1;
if (asf->packet_frag_size > asf->packet_size_left - rsize + asf->packet_padsize) {
av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid (%d-%d)\n", asf->packet_size_left, rsize);
return -1;
} else {
int diff = asf->packet_frag_size - (asf->packet_size_left - rsize);
asf->packet_size_left += diff;
asf->packet_padsize -= diff;
}
}
//printf("Fragsize %d\n", asf->packet_frag_size);
} else {