196c67d7ff
Original commit message from CVS: Changed the GstPadFactory and added the GstPadTemplate. The GstPadFactory is an easy way to define a pad with capabilities. The GstPadFactory is converted into a GstPadTemplate. The template is used to create new pads and to expose the possible pads used in an element to the plugin system. updated mp3parse, mpg123, cdparanoia to the new API. Rerun gstreamer-register because the XML definition has changed.
163 lines
3.5 KiB
C
163 lines
3.5 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_new:
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* @mime: the mime type to attach to the capability
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*
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* create a new capability with the given mime type
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*
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* Returns: a new capability
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*/
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GstCaps*
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gst_caps_new (gchar *mime)
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{
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GstCaps *caps;
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g_return_val_if_fail (mime != NULL, NULL);
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caps = g_new0 (GstCaps, 1);
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caps->id = get_type_for_mime (mime);
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return caps;
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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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