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tag: xmp: Refactor buffer parsing

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When parsing the xmp buffer into the gst taglist store the
found tags into a list to be parsed only after finding all
tags on the buffer. This allows the parser function to search
this list for complimentary tags that should be parsed together

Fixes #613690
This commit is contained in:
Thiago Santos 2010-03-22 22:03:09 -03:00
parent e82414643c
commit fe1f3e3595
1 changed files with 38 additions and 2 deletions
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40
gst-libs/gst/tag/gstxmptag.c
View file

@ -53,6 +53,14 @@ struct _XmpTag
};
typedef struct _XmpTag XmpTag;
struct _PendingXmpTag
{
const gchar *gst_tag;
XmpTag *xmp_tag;
gchar *str;
};
typedef struct _PendingXmpTag PendingXmpTag;
/*
* Mappings from gstreamer tags to xmp tags
*
@ -309,6 +317,7 @@ gst_tag_list_from_xmp_buffer (const GstBuffer * buffer)
guint i;
const gchar *last_tag = NULL;
XmpTag *last_xmp_tag = NULL;
GSList *pending_tags = NULL;
xmp_tags_initialize ();
@ -423,7 +432,14 @@ gst_tag_list_from_xmp_buffer (const GstBuffer * buffer)
*/
gst_tag = _xmp_tag_get_mapping_reverse (as, &xmp_tag);
if (gst_tag) {
read_one_tag (list, gst_tag, xmp_tag, v);
PendingXmpTag *ptag;
ptag = g_slice_new (PendingXmpTag);
ptag->gst_tag = gst_tag;
ptag->xmp_tag = xmp_tag;
ptag->str = g_strdup (v);
pending_tags = g_slist_append (pending_tags, ptag);
}
}
/* restore chars overwritten by '\0' */
@ -475,7 +491,14 @@ gst_tag_list_from_xmp_buffer (const GstBuffer * buffer)
/* only log non-newline nodes, we still have to parse them */
GST_INFO ("txt: %s", part);
if (last_tag) {
read_one_tag (list, last_tag, last_xmp_tag, part);
PendingXmpTag *ptag;
ptag = g_slice_new (PendingXmpTag);
ptag->gst_tag = last_tag;
ptag->xmp_tag = last_xmp_tag;
ptag->str = g_strdup (part);
pending_tags = g_slist_append (pending_tags, ptag);
}
}
/* next cycle */
@ -484,6 +507,19 @@ gst_tag_list_from_xmp_buffer (const GstBuffer * buffer)
pp = part;
}
}
/* parse the entries */
while (pending_tags) {
PendingXmpTag *ptag = (PendingXmpTag *) pending_tags->data;
read_one_tag (list, ptag->gst_tag, ptag->xmp_tag, ptag->str);
g_free (ptag->str);
g_slice_free (PendingXmpTag, ptag);
pending_tags = g_slist_delete_link (pending_tags, pending_tags);
}
GST_INFO ("xmp packet parsed, %d entries",
gst_structure_n_fields ((GstStructure *) list));