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ssaparse: ignore invalid UTF-8 in init section

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The codec data blob we get from matroskademux with the SSA/ASS
init section is supposed to be valid UTF-8. If it's not, just
continue with the bits that are valid UTF-8 instead of erroring
out. We don't actually parse the init section yet anyway..

https://bugzilla.gnome.org/show_bug.cgi?id=607630
This commit is contained in:
Tim-Philipp Müller 2012-12-17 00:59:57 +00:00
parent 6549db36cd
commit 53072a4326
1 changed files with 13 additions and 11 deletions
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24
gst/subparse/gstssaparse.c
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@ -150,10 +150,11 @@ gst_ssa_parse_setcaps (GstPad * sinkpad, GstCaps * caps)
const GValue *val; const GValue *val;
GstStructure *s; GstStructure *s;
const guchar bom_utf8[] = { 0xEF, 0xBB, 0xBF }; const guchar bom_utf8[] = { 0xEF, 0xBB, 0xBF };
const gchar *end;
GstBuffer *priv; GstBuffer *priv;
GstMapInfo map; GstMapInfo map;
gchar *ptr; gchar *ptr;
gsize left; gsize left, bad_offset;
gboolean ret; gboolean ret;
s = gst_caps_get_structure (caps, 0); s = gst_caps_get_structure (caps, 0);
@ -172,7 +173,10 @@ gst_ssa_parse_setcaps (GstPad * sinkpad, GstCaps * caps)
gst_buffer_ref (priv); gst_buffer_ref (priv);
gst_buffer_map (priv, &map, GST_MAP_READ); if (!gst_buffer_map (priv, &map, GST_MAP_READ))
return FALSE;
GST_MEMDUMP_OBJECT (parse, "init section", map.data, map.size);
ptr = (gchar *) map.data; ptr = (gchar *) map.data;
left = map.size; left = map.size;
@ -186,8 +190,13 @@ gst_ssa_parse_setcaps (GstPad * sinkpad, GstCaps * caps)
if (!strstr (ptr, "[Script Info]")) if (!strstr (ptr, "[Script Info]"))
goto invalid_init; goto invalid_init;
if (!g_utf8_validate (ptr, left, NULL)) if (!g_utf8_validate (ptr, left, &end)) {
goto invalid_utf8; bad_offset = (gsize) (end - ptr);
GST_WARNING_OBJECT (parse, "Init section is not valid UTF-8. Problem at "
"byte offset %" G_GSIZE_FORMAT, bad_offset);
/* continue with valid UTF-8 data */
left = bad_offset;
}
/* FIXME: parse initial section */ /* FIXME: parse initial section */
parse->ini = g_strndup (ptr, left); parse->ini = g_strndup (ptr, left);
@ -212,13 +221,6 @@ invalid_init:
gst_buffer_unref (priv); gst_buffer_unref (priv);
return FALSE; return FALSE;
} }
invalid_utf8:
{
GST_WARNING_OBJECT (parse, "Init section is not valid UTF-8");
gst_buffer_unmap (priv, &map);
gst_buffer_unref (priv);
return FALSE;
}
} }
static gboolean static gboolean