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Add new typefing helper function to guess the caps based on the file
extension. See #566661. API: gst_type_find_helper_for_extension()
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2 changed files with 68 additions and 0 deletions
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@ -476,3 +476,68 @@ gst_type_find_helper_for_buffer (GstObject * obj, GstBuffer * buf,
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return result;
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}
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/**
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* gst_type_find_helper_for_extension:
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* @obj: object doing the typefinding, or NULL (used for logging)
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* @extension: an extension
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*
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* Tries to find the best #GstCaps associated with @extension.
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*
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* All available typefinders will be checked against the extension in order
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* of rank. The caps of the first typefinder that can handle @extension will be
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* returned.
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*
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* Returns: The #GstCaps corresponding to @extension, or #NULL if no type could
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* be found. The caller should free the caps returned with gst_caps_unref().
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*
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* Since: 0.10.23
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*/
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GstCaps *
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gst_type_find_helper_for_extension (GstObject * obj, const gchar * extension)
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{
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GList *l, *type_list;
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GstCaps *result = NULL;
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g_return_val_if_fail (extension != NULL, NULL);
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GST_LOG_OBJECT (obj, "finding caps for extension %s", extension);
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type_list = gst_type_find_factory_get_list ();
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type_list = g_list_sort (type_list, type_find_factory_rank_cmp);
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for (l = type_list; l; l = g_list_next (l)) {
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GstTypeFindFactory *factory;
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gchar **ext;
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gint i;
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factory = GST_TYPE_FIND_FACTORY (l->data);
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/* get the extension that this typefind factory can handle */
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ext = gst_type_find_factory_get_extensions (factory);
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if (ext == NULL)
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continue;
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/* we only want to check those factories without a function */
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if (factory->function != NULL)
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continue;
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/* there are extension, see if one of them matches the requested
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* extension */
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for (i = 0; ext[i]; i++) {
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if (strcmp (ext[i], extension) == 0) {
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/* we found a matching extension, take the caps */
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if ((result = gst_type_find_factory_get_caps (factory))) {
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gst_caps_ref (result);
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goto done;
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}
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}
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}
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}
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done:
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gst_plugin_feature_list_free (type_list);
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GST_LOG_OBJECT (obj, "Returning %" GST_PTR_FORMAT, result);
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return result;
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}
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@ -34,6 +34,9 @@ GstCaps * gst_type_find_helper_for_buffer (GstObject *obj,
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GstBuffer *buf,
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GstTypeFindProbability *prob);
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GstCaps * gst_type_find_helper_for_extension (GstObject * obj,
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const gchar * extension);
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/**
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* GstTypeFindHelperGetRangeFunction:
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* @obj: a #GstObject that will handle the getrange request
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