d78215be9d
Original commit message from CVS: More Caps changes, this change introduces the padfactory. the GstPadFactory will be used to describe the pads that an element will contain during its lifetime. mpg123 and mp3parse serve as an example. More XML changes to incorporate the padfactories.
142 lines
3.2 KiB
C
142 lines
3.2 KiB
C
/* Gnome-Streamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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//#define DEBUG_ENABLED
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#include <stdarg.h>
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#include <gst/gst.h>
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void
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_gst_caps_initialize (void)
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{
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}
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static guint16
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get_type_for_mime (gchar *mime)
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{
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guint16 typeid;
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typeid = gst_type_find_by_mime (mime);
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if (typeid == 0) {
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GstTypeFactory *factory = g_new0 (GstTypeFactory, 1);
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factory->mime = g_strdup (mime);
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factory->exts = NULL;
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factory->typefindfunc = NULL;
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typeid = gst_type_register (factory);
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}
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return typeid;
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}
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/**
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* gst_caps_register:
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* @factory: the factory to register
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*
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* Register the factory.
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*
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* Returns: The registered capability
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*/
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GstCaps *
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gst_caps_register (GstCapsFactory *factory)
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{
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GstCapsFactoryEntry tag;
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gint i = 0;
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guint16 typeid;
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GstCaps *caps;
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g_return_val_if_fail (factory != NULL, NULL);
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tag = (*factory)[i++];
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g_return_val_if_fail (tag != NULL, NULL);
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typeid = get_type_for_mime ((gchar *)tag);
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caps = g_new0 (GstCaps, 1);
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g_return_val_if_fail (caps != NULL, NULL);
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caps->id = typeid;
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caps->properties = gst_props_register (&(*factory)[i]);
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return caps;
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}
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/**
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* gst_caps_check_compatibility:
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* @fromcaps: a capabilty
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* @tocaps: a capabilty
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*
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* Checks whether two capabilities are compatible
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*
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* Returns: true if compatible, false otherwise
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*/
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gboolean
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gst_caps_check_compatibility (GstCaps *fromcaps, GstCaps *tocaps)
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{
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g_return_val_if_fail (fromcaps != NULL, FALSE);
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g_return_val_if_fail (tocaps != NULL, FALSE);
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if (fromcaps->id != tocaps->id)
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return FALSE;
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return gst_props_check_compatibility (fromcaps->properties, tocaps->properties);
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}
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xmlNodePtr
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gst_caps_save_thyself (GstCaps *caps, xmlNodePtr parent)
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{
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xmlNodePtr subtree;
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g_return_val_if_fail (caps != NULL, NULL);
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xmlNewChild (parent, NULL, "type", gst_type_find_by_id (caps->id)->mime);
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if (caps->properties) {
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subtree = xmlNewChild (parent, NULL, "properties", NULL);
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gst_props_save_thyself (caps->properties, subtree);
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}
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return parent;
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}
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GstCaps*
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gst_caps_load_thyself (xmlNodePtr parent)
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{
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GstCaps *caps = g_new0 (GstCaps, 1);
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xmlNodePtr field = parent->childs;
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while (field) {
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if (!strcmp (field->name, "type")) {
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caps->id = get_type_for_mime (xmlNodeGetContent (field));
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}
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else if (!strcmp (field->name, "properties")) {
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caps->properties = gst_props_load_thyself (field);
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}
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field = field->next;
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}
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return caps;
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}
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