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h264parse: detect and fix for bad NALU sizes

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when in AVC mode a nalu size seems invalid, assume the NALU has the size of the
available data instead of looping forever.

Fixes #586354
This commit is contained in:
Wim Taymans 2009-06-22 11:19:07 +02:00
parent deb03ee2ca
commit 1cf9f2d497
1 changed files with 10 additions and 0 deletions
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10
gst/h264parse/gsth264parse.c
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@ -464,6 +464,16 @@ gst_h264_parse_chain_forward (GstH264Parse * h264parse, gboolean discont,
for (i = 0; i < h264parse->nal_length_size; i++)
nalu_size = (nalu_size << 8) | data[i];
GST_LOG_OBJECT (h264parse, "got NALU size %u", nalu_size);
/* check for invalid NALU sizes, assume the size if the available bytes
* when something is fishy */
if (nalu_size <= 1 || nalu_size + h264parse->nal_length_size > avail) {
nalu_size = avail - h264parse->nal_length_size;
GST_DEBUG_OBJECT (h264parse, "fixing invalid NALU size to %u",
nalu_size);
}
/* Packetized format, see if we have to split it, usually splitting is not
* a good idea as decoders have no way of handling it. */
if (h264parse->split_packetized) {