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 "gst_private.h"
26 #include "gstformat.h"
28 static GList *_gst_formats = NULL;
29 static GHashTable *_nick_to_format = NULL;
30 static GHashTable *_format_to_nick = NULL;
31 static gint _n_values = 1; /* we start from 1 because 0 reserved for UNDEFINED */
33 static GstFormatDefinition standard_definitions[] = {
34 {GST_FORMAT_DEFAULT, "default", "Default format for the media type"},
35 {GST_FORMAT_BYTES, "bytes", "Bytes"},
36 {GST_FORMAT_TIME, "time", "Time"},
37 {GST_FORMAT_BUFFERS, "buffers", "Buffers"},
38 {GST_FORMAT_PERCENT, "percent", "Percent"},
43 _gst_format_initialize (void)
45 GstFormatDefinition *standards = standard_definitions;
47 if (_nick_to_format == NULL) {
48 _nick_to_format = g_hash_table_new (g_str_hash, g_str_equal);
49 _format_to_nick = g_hash_table_new (NULL, NULL);
52 while (standards->nick) {
53 g_hash_table_insert (_nick_to_format, standards->nick, standards);
54 g_hash_table_insert (_format_to_nick, GINT_TO_POINTER (standards->value),
57 _gst_formats = g_list_append (_gst_formats, standards);
64 * gst_format_register:
65 * @nick: The nick of the new format
66 * @description: The description of the new format
68 * Create a new GstFormat based on the nick or return an
69 * allrady registered format with that nick
71 * Returns: A new GstFormat or an already registered format
75 gst_format_register (const gchar * nick, const gchar * description)
77 GstFormatDefinition *format;
80 g_return_val_if_fail (nick != NULL, 0);
81 g_return_val_if_fail (description != NULL, 0);
83 query = gst_format_get_by_nick (nick);
84 if (query != GST_FORMAT_UNDEFINED)
87 format = g_new0 (GstFormatDefinition, 1);
88 format->value = _n_values;
89 format->nick = g_strdup (nick);
90 format->description = g_strdup (description);
92 g_hash_table_insert (_nick_to_format, format->nick, format);
93 g_hash_table_insert (_format_to_nick, GINT_TO_POINTER (format->value),
95 _gst_formats = g_list_append (_gst_formats, format);
102 * gst_format_get_by_nick:
103 * @nick: The nick of the format
105 * Return the format registered with the given nick.
107 * Returns: The format with @nick or GST_FORMAT_UNDEFINED
108 * if the format was not registered.
111 gst_format_get_by_nick (const gchar * nick)
113 GstFormatDefinition *format;
115 g_return_val_if_fail (nick != NULL, 0);
117 format = g_hash_table_lookup (_nick_to_format, nick);
120 return format->value;
122 return GST_FORMAT_UNDEFINED;
126 * gst_formats_contains:
127 * @formats: The format array to search
128 * @format: the format to find
130 * See if the given format is inside the format array.
132 * Returns: TRUE if the format is found inside the array
135 gst_formats_contains (const GstFormat * formats, GstFormat format)
141 if (*formats == format)
151 * gst_format_get_details:
152 * @format: The format to get details of
154 * Get details about the given format.
156 * Returns: The #GstFormatDefinition for @format or NULL on failure.
158 const GstFormatDefinition *
159 gst_format_get_details (GstFormat format)
161 return g_hash_table_lookup (_format_to_nick, GINT_TO_POINTER (format));
165 * gst_format_get_definitions:
167 * Get a list of all the registered formats.
169 * Returns: A GList of #GstFormatDefinition.
172 gst_format_get_definitions (void)