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gst/typefind/gsttypefindfunctions.c: Lower probability a bit if the marker isn't right at the start, to decrease the ...

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Original commit message from CVS:
* gst/typefind/gsttypefindfunctions.c: (mpeg2_sys_type_find):
Lower probability a bit if the marker isn't right at the start,
to decrease the chance of false positives.
This commit is contained in:
Tim-Philipp Müller 2007-01-19 12:23:06 +00:00
parent c47074371a
commit 91773593cf
2 changed files with 13 additions and 2 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
2007-01-19 Tim-Philipp Müller <tim at centricular dot net>
* gst/typefind/gsttypefindfunctions.c: (mpeg2_sys_type_find):
Lower probability a bit if the marker isn't right at the start,
to decrease the chance of false positives.
2007-01-19 Tim-Philipp Müller <tim at centricular dot net>
* gst/typefind/gsttypefindfunctions.c: (mpeg2_sys_type_find):

9
gst/typefind/gsttypefindfunctions.c
View file

@ -1034,7 +1034,7 @@ static GstStaticCaps mpeg_sys_caps = GST_STATIC_CAPS ("video/mpeg, "
static void
mpeg2_sys_type_find (GstTypeFind * tf, gpointer unused)
{
guint8 *data;
guint8 *data, *data0;
gint mpegversion, len;
len = MPEG2_MAX_PROBE_LENGTH * 2;
@ -1046,6 +1046,7 @@ mpeg2_sys_type_find (GstTypeFind * tf, gpointer unused)
if (!data)
return;
data0 = data;
while (len > 0) {
if (IS_MPEG_PACK_HEADER (data)) {
if ((data[4] & 0xC0) == 0x40) {
@ -1071,7 +1072,11 @@ suggest:
gst_structure_set (gst_caps_get_structure (caps, 0), "mpegversion",
G_TYPE_INT, mpegversion, NULL);
gst_type_find_suggest (tf, GST_TYPE_FIND_POSSIBLE, caps);
/* lower probability if the marker isn't right at the start */
if (data0 == data)
gst_type_find_suggest (tf, GST_TYPE_FIND_POSSIBLE, caps);
else
gst_type_find_suggest (tf, GST_TYPE_FIND_POSSIBLE - 10, caps);
gst_caps_unref (caps);
}
};