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API: Add gst_uri_protocol_is_supported(), which checks if an sink or src that supports a given URI protocol exists.

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Original commit message from CVS:
* docs/gst/gstreamer-sections.txt:
* gst/gsturi.c: (get_element_factories_from_uri_protocol),
(gst_uri_protocol_is_supported), (gst_element_make_from_uri):
* gst/gsturi.h:
API: Add gst_uri_protocol_is_supported(), which checks if an sink
or src that supports a given URI protocol exists.
This commit is contained in:
Sebastian Dröge 2007-04-27 08:30:59 +00:00
parent 7223b8a804
commit 003aaeaef3
4 changed files with 61 additions and 7 deletions
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9
ChangeLog
View file

@ -1,3 +1,12 @@
2007-04-27 Sebastian Dröge <slomo@circular-chaos.org>
* docs/gst/gstreamer-sections.txt:
* gst/gsturi.c: (get_element_factories_from_uri_protocol),
(gst_uri_protocol_is_supported), (gst_element_make_from_uri):
* gst/gsturi.h:
API: Add gst_uri_protocol_is_supported(), which checks if an sink
or src that supports a given URI protocol exists.
2007-04-27 Sebastian Dröge <slomo@circular-chaos.org>
* plugins/elements/gstfilesink.c: (gst_file_sink_uri_set_uri):

1
docs/gst/gstreamer-sections.txt
View file

@ -2070,6 +2070,7 @@ GstURIHandlerInterface
GstURIType
GST_URI_TYPE_IS_VALID
gst_uri_protocol_is_valid
gst_uri_protocol_is_supported
gst_uri_is_valid
gst_uri_has_protocol
gst_uri_get_protocol

56
gst/gsturi.c
View file

@ -458,7 +458,7 @@ gst_uri_construct (const gchar * protocol, const gchar * location)
typedef struct
{
GstURIType type;
gchar *protocol;
const gchar *protocol;
}
SearchEntry;
@ -502,6 +502,50 @@ sort_by_rank (gconstpointer a, gconstpointer b)
gst_plugin_feature_get_rank (first);
}
static GList *
get_element_factories_from_uri_protocol (const GstURIType type,
const gchar * protocol)
{
GList *possibilities;
SearchEntry entry;
g_return_val_if_fail (protocol, NULL);
entry.type = type;
entry.protocol = protocol;
possibilities = gst_registry_feature_filter (gst_registry_get_default (),
search_by_entry, FALSE, &entry);
return possibilities;
}
/**
* gst_uri_protocol_is_supported:
* @type: Wether to check for a source or a sink
* @protocol: Protocol that should be checkd for.
*
* Checks if an element exists that supports the given URI protocol.
*
* Returns: TRUE
*
* Since: 0.10.13
*/
gboolean
gst_uri_protocol_is_supported (const GstURIType type, const gchar * protocol)
{
GList *possibilities;
g_return_val_if_fail (protocol, FALSE);
possibilities = get_element_factories_from_uri_protocol (type, protocol);
if (possibilities) {
g_list_free (possibilities);
return TRUE;
} else
return FALSE;
}
/**
* gst_element_make_from_uri:
* @type: Wether to create a source or a sink
@ -517,17 +561,15 @@ gst_element_make_from_uri (const GstURIType type, const gchar * uri,
const gchar * elementname)
{
GList *possibilities, *walk;
SearchEntry entry;
gchar *protocol;
GstElement *ret = NULL;
g_return_val_if_fail (GST_URI_TYPE_IS_VALID (type), NULL);
g_return_val_if_fail (gst_uri_is_valid (uri), NULL);
entry.type = type;
entry.protocol = gst_uri_get_protocol (uri);
possibilities = gst_registry_feature_filter (gst_registry_get_default (),
search_by_entry, FALSE, &entry);
g_free (entry.protocol);
protocol = gst_uri_get_protocol (uri);
possibilities = get_element_factories_from_uri_protocol (type, protocol);
g_free (protocol);
if (!possibilities) {
GST_DEBUG ("No %s for URI '%s'", type == GST_URI_SINK ? "sink" : "source",

2
gst/gsturi.h
View file

@ -113,6 +113,8 @@ struct _GstURIHandlerInterface {
/* general URI functions */
gboolean gst_uri_protocol_is_valid (const gchar * protocol);
gboolean gst_uri_protocol_is_supported (const GstURIType type,
const gchar *protocol);
gboolean gst_uri_is_valid (const gchar * uri);
gchar * gst_uri_get_protocol (const gchar * uri);
gboolean gst_uri_has_protocol (const gchar * uri,