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If no type was found using the typefind functions, try doing an upstream

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URI query to guess the type from the extension. See #566661.
This commit is contained in:
Wim Taymans 2009-01-21 12:50:29 +01:00 committed by Wim Taymans
parent 8620bc3295
commit 5b868cbbb0
1 changed files with 77 additions and 5 deletions
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82
plugins/elements/gsttypefindelement.c
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@ -606,6 +606,71 @@ gst_type_find_element_setcaps (GstPad * pad, GstCaps * caps)
return TRUE;
}
static GstCaps *
gst_type_find_guess_by_extension (GstTypeFindElement *typefind, GstPad *pad,
GstTypeFindProbability *probability)
{
GstQuery *query;
gchar *uri;
size_t len;
gint find;
GstCaps *caps;
query = gst_query_new_uri ();
/* try getting the caps with an uri query and from the extension */
if (!gst_pad_peer_query (pad, query))
goto peer_query_failed;
gst_query_parse_uri (query, &uri);
if (uri == NULL)
goto no_uri;
GST_DEBUG_OBJECT (typefind, "finding extension of %s", uri);
/* find the extension on the uri, this is everything after a '.' */
len = strlen (uri);
find = len - 1;
while (find >= 0) {
if (uri[find] == '.')
break;
find--;
}
if (find < 0)
goto no_extension;
GST_DEBUG_OBJECT (typefind, "found extension %s", &uri[find+1]);
caps = gst_type_find_helper_for_extension (GST_OBJECT_CAST (typefind), &uri[find+1]);
if (caps)
*probability = GST_TYPE_FIND_MAXIMUM;
gst_query_unref (query);
return caps;
/* ERRORS */
peer_query_failed:
{
GST_WARNING_OBJECT (typefind, "failed to query peer uri");
gst_query_unref (query);
return NULL;
}
no_uri:
{
GST_WARNING_OBJECT (typefind, "could not parse the peer uri");
gst_query_unref (query);
return NULL;
}
no_extension:
{
GST_WARNING_OBJECT (typefind, "could not find uri extension in %s", uri);
gst_query_unref (query);
return NULL;
}
}
static GstFlowReturn
gst_type_find_element_chain (GstPad * pad, GstBuffer * buffer)
{
@ -752,9 +817,11 @@ gst_type_find_element_activate (GstPad * pad)
2. try to pull type find.
3. deactivate pull mode.
4. src pad might have been activated push by the state change. deactivate.
5. if we didn't find any caps, fail.
6. emit have-type; maybe the app connected the source pad to something.
7. if the sink pad is activated, we are in pull mode. succeed.
5. if we didn't find any caps, try getting the uri extension by doing an uri
query.
6. if we didn't find any caps, fail.
7. emit have-type; maybe the app connected the source pad to something.
8. if the sink pad is activated, we are in pull mode. succeed.
otherwise activate both pads in push mode and succeed.
*/
@ -803,6 +870,11 @@ gst_type_find_element_activate (GstPad * pad)
gst_pad_activate_push (typefind->src, FALSE);
/* 5 */
if (!found_caps || probability < typefind->min_probability) {
found_caps = gst_type_find_guess_by_extension (typefind, pad, &probability);
}
/* 6 */
if (!found_caps || probability < typefind->min_probability) {
GST_ELEMENT_ERROR (typefind, STREAM, TYPE_NOT_FOUND, (NULL), (NULL));
gst_caps_replace (&found_caps, NULL);
@ -810,13 +882,13 @@ gst_type_find_element_activate (GstPad * pad)
}
done:
/* 6 */
/* 7 */
g_signal_emit (typefind, gst_type_find_element_signals[HAVE_TYPE],
0, probability, found_caps);
gst_caps_unref (found_caps);
typefind->mode = MODE_NORMAL;
/* 7 */
/* 8 */
if (gst_pad_is_active (pad))
return TRUE;
else {