2 * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
3 * 2000 Wim Taymans <wim.taymans@chello.be>
5 * gstformat.c: GstFormat registration
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Library General Public License for more details.
17 * You should have received a copy of the GNU Library General Public
18 * License along with this library; if not, write to the
19 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 * Boston, MA 02111-1307, USA.
25 #include "gstformat.h"
27 static GList *_gst_formats = NULL;
28 static gint _n_values = 1; /* we start from 1 because 0 reserved for UNDEFINED */
30 typedef struct _GstFormatDefinition GstFormatDefinition;
32 struct _GstFormatDefinition
39 static GstFormatDefinition standard_definitions[] = {
40 { GST_FORMAT_DEFAULT, "default", "Default" },
41 { GST_FORMAT_BYTES, "bytes", "Bytes" },
42 { GST_FORMAT_TIME, "time", "Time" },
43 { GST_FORMAT_BUFFERS, "buffers", "Buffers" },
44 { GST_FORMAT_PERCENT, "percent", "Percent" },
45 { GST_FORMAT_UNITS, "units", "Units as defined by the media type" },
50 _gst_format_initialize (void)
52 GstFormatDefinition *standards = standard_definitions;
54 while (standards->nick) {
55 _gst_formats = g_list_prepend (_gst_formats, standards);
62 * gst_format_register:
63 * @nick: The nick of the new format
64 * @description: The description of the new format
66 * Create a new GstFormat based on the nick or return an
67 * allrady registered format with that nick
69 * Returns: A new GstFormat or an already registered format
73 gst_format_register (const gchar *nick, const gchar *description)
75 GstFormatDefinition *format;
78 g_return_val_if_fail (nick != NULL, 0);
79 g_return_val_if_fail (description != NULL, 0);
81 query = gst_format_get_by_nick (nick);
82 if (query != GST_FORMAT_UNDEFINED)
85 format = g_new0 (GstFormatDefinition, 1);
86 format->value = _n_values;
87 format->nick = g_strdup (nick);
88 format->description = g_strdup (description);
90 _gst_formats = g_list_prepend (_gst_formats, format);
98 * gst_format_get_by_nick:
99 * @nick: The nick of the format
101 * Return the format registered with the given nick.
103 * Returns: The format with @nick or GST_FORMAT_UNDEFINED
104 * if the format was not registered.
107 gst_format_get_by_nick (const gchar *nick)
110 GstFormatDefinition *format;
112 g_return_val_if_fail (nick != NULL, 0);
117 format = (GstFormatDefinition *) walk->data;
119 if (!strcmp (format->nick, nick))
120 return format->value;
122 walk = g_list_next (walk);
125 return GST_FORMAT_UNDEFINED;
129 * gst_format_get_details:
130 * @format: The format to get details of
131 * @nick: The nick of the format
132 * @description: The description of the format
134 * Get details about the given format.
136 * Returns: TRUE if the format was registered, FALSE otherwise
139 gst_format_get_details (GstFormat format, const gchar **nick, const gchar **description)
142 GstFormatDefinition *walk_format;
144 g_return_val_if_fail (nick != NULL, FALSE);
145 g_return_val_if_fail (description != NULL, FALSE);
150 walk_format = (GstFormatDefinition *) walk->data;
152 if (walk_format->value == format) {
153 *nick = walk_format->nick;
154 *description = walk_format->description;
159 walk = g_list_next (walk);