*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
+ * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
*/
/**
* SECTION:gsttypefind
+ * @title: GstTypefind
* @short_description: Stream type detection
*
* The following functions allow you to detect the media type of an unknown
* stream.
- *
- * Last reviewed on 2005-11-09 (0.9.4)
*/
#include "gst_private.h"
#include "gstregistry.h"
#include "gsttypefindfactory.h"
-GST_DEBUG_CATEGORY_EXTERN (gst_type_find_debug);
-#define GST_CAT_DEFAULT gst_type_find_debug
-
-GType
-gst_type_find_get_type (void)
-{
- static GType typefind_type = 0;
+GST_DEBUG_CATEGORY_EXTERN (type_find_debug);
+#define GST_CAT_DEFAULT type_find_debug
- if (G_UNLIKELY (typefind_type == 0)) {
- typefind_type = g_pointer_type_register_static ("GstTypeFind");
- }
- return typefind_type;
-}
+G_DEFINE_POINTER_TYPE (GstTypeFind, gst_type_find);
/**
* gst_type_find_register:
- * @plugin: A #GstPlugin.
+ * @plugin: (allow-none): A #GstPlugin, or %NULL for a static typefind function
* @name: The name for registering
* @rank: The rank (or importance) of this typefind function
* @func: The #GstTypeFindFunction to use
- * @extensions: Optional extensions that could belong to this type
+ * @extensions: (allow-none): Optional comma-separated list of extensions
+ * that could belong to this type
* @possible_caps: Optionally the caps that could be returned when typefinding
* succeeds
* @data: Optional user data. This user data must be available until the plugin
* registering this function will be available for typefinding.
* This function is typically called during an element's plugin initialization.
*
- * Returns: TRUE on success, FALSE otherwise
+ * Returns: %TRUE on success, %FALSE otherwise
*/
gboolean
gst_type_find_register (GstPlugin * plugin, const gchar * name, guint rank,
- GstTypeFindFunction func, gchar ** extensions,
- const GstCaps * possible_caps, gpointer data, GDestroyNotify data_notify)
+ GstTypeFindFunction func, const gchar * extensions,
+ GstCaps * possible_caps, gpointer data, GDestroyNotify data_notify)
{
GstTypeFindFactory *factory;
- g_return_val_if_fail (plugin != NULL, FALSE);
g_return_val_if_fail (name != NULL, FALSE);
- g_return_val_if_fail (func != NULL, FALSE);
GST_INFO ("registering typefind function for %s", name);
factory = g_object_new (GST_TYPE_TYPE_FIND_FACTORY, NULL);
GST_DEBUG_OBJECT (factory, "using new typefind factory for %s", name);
- g_assert (GST_IS_TYPE_FIND_FACTORY (factory));
- gst_plugin_feature_set_name (GST_PLUGIN_FEATURE (factory), name);
- gst_plugin_feature_set_rank (GST_PLUGIN_FEATURE (factory), rank);
- if (factory->extensions)
- g_strfreev (factory->extensions);
+ gst_plugin_feature_set_name (GST_PLUGIN_FEATURE_CAST (factory), name);
+ gst_plugin_feature_set_rank (GST_PLUGIN_FEATURE_CAST (factory), rank);
+
+ if (extensions)
+ factory->extensions = g_strsplit (extensions, ",", -1);
- factory->extensions = g_strdupv (extensions);
- gst_caps_replace (&factory->caps, (GstCaps *) possible_caps);
+ gst_caps_replace (&factory->caps, possible_caps);
factory->function = func;
factory->user_data = data;
factory->user_data_notify = data_notify;
- GST_PLUGIN_FEATURE (factory)->plugin_name = g_strdup (plugin->desc.name);
- GST_PLUGIN_FEATURE (factory)->loaded = TRUE;
+ if (plugin && plugin->desc.name) {
+ GST_PLUGIN_FEATURE_CAST (factory)->plugin_name = plugin->desc.name; /* interned string */
+ GST_PLUGIN_FEATURE_CAST (factory)->plugin = plugin;
+ g_object_add_weak_pointer ((GObject *) plugin,
+ (gpointer *) & GST_PLUGIN_FEATURE_CAST (factory)->plugin);
+ } else {
+ GST_PLUGIN_FEATURE_CAST (factory)->plugin_name = "NULL";
+ GST_PLUGIN_FEATURE_CAST (factory)->plugin = NULL;
+ }
+ GST_PLUGIN_FEATURE_CAST (factory)->loaded = TRUE;
- gst_registry_add_feature (gst_registry_get_default (),
- GST_PLUGIN_FEATURE (factory));
+ gst_registry_add_feature (gst_registry_get (),
+ GST_PLUGIN_FEATURE_CAST (factory));
return TRUE;
}
* the stream. The returned memory is valid until the typefinding function
* returns and must not be freed.
*
- * Returns: the requested data, or NULL if that data is not available.
+ * Returns: (transfer none) (array length=size) (nullable): the
+ * requested data, or %NULL if that data is not available.
*/
-guint8 *
+const guint8 *
gst_type_find_peek (GstTypeFind * find, gint64 offset, guint size)
{
g_return_val_if_fail (find->peek != NULL, NULL);
* It is up to the caller of the #GstTypeFindFunction to interpret these values.
*/
void
-gst_type_find_suggest (GstTypeFind * find, guint probability,
- const GstCaps * caps)
+gst_type_find_suggest (GstTypeFind * find, guint probability, GstCaps * caps)
{
g_return_if_fail (find->suggest != NULL);
g_return_if_fail (probability <= 100);
}
/**
+ * gst_type_find_suggest_simple:
+ * @find: The #GstTypeFind object the function was called with
+ * @probability: The probability in percent that the suggestion is right
+ * @media_type: the media type of the suggested caps
+ * @fieldname: (allow-none): first field of the suggested caps, or %NULL
+ * @...: additional arguments to the suggested caps in the same format as the
+ * arguments passed to gst_structure_new() (ie. triplets of field name,
+ * field GType and field value)
+ *
+ * If a #GstTypeFindFunction calls this function it suggests the caps with the
+ * given probability. A #GstTypeFindFunction may supply different suggestions
+ * in one call. It is up to the caller of the #GstTypeFindFunction to interpret
+ * these values.
+ *
+ * This function is similar to gst_type_find_suggest(), only that instead of
+ * passing a #GstCaps argument you can create the caps on the fly in the same
+ * way as you can with gst_caps_new_simple().
+ *
+ * Make sure you terminate the list of arguments with a %NULL argument and that
+ * the values passed have the correct type (in terms of width in bytes when
+ * passed to the vararg function - this applies particularly to gdouble and
+ * guint64 arguments).
+ */
+void
+gst_type_find_suggest_simple (GstTypeFind * find, guint probability,
+ const char *media_type, const char *fieldname, ...)
+{
+ GstStructure *structure;
+ va_list var_args;
+ GstCaps *caps;
+
+ g_return_if_fail (find->suggest != NULL);
+ g_return_if_fail (probability <= 100);
+ g_return_if_fail (media_type != NULL);
+
+ caps = gst_caps_new_empty ();
+
+ va_start (var_args, fieldname);
+ structure = gst_structure_new_valist (media_type, fieldname, var_args);
+ va_end (var_args);
+
+ gst_caps_append_structure (caps, structure);
+ g_return_if_fail (gst_caps_is_fixed (caps));
+
+ find->suggest (find->data, probability, caps);
+ gst_caps_unref (caps);
+}
+
+/**
* gst_type_find_get_length:
* @find: The #GstTypeFind the function was called with
*
projects / platform / upstream / gstreamer.git / blobdiff