2 * codecs interface 2007 Tomas Kukosa
6 * Wireshark - Network traffic analyzer
7 * By Gerald Combs <gerald@wireshark.org>
8 * Copyright 1998 Gerald Combs
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version 2
13 * of the License, or (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
29 #include <epan/codecs.h>
33 codec_init_fn init_fn;
34 codec_release_fn release_fn;
35 codec_decode_fn decode_fn;
39 * List of registered codecs.
41 static GHashTable *registered_codecs = NULL;
44 /* Find a registered codec by name. */
46 find_codec(const char *name)
48 return (registered_codecs) ? g_hash_table_lookup(registered_codecs, name) : NULL;
51 /* Register a codec by name. */
53 register_codec(const char *name, codec_init_fn init_fn, codec_release_fn release_fn, codec_decode_fn decode_fn)
55 struct codec_handle *handle;
57 /* Create our hash table if it doesn't already exist */
58 if (registered_codecs == NULL) {
59 registered_codecs = g_hash_table_new(g_str_hash, g_str_equal);
60 g_assert(registered_codecs != NULL);
63 /* Make sure the registration is unique */
64 g_assert(g_hash_table_lookup(registered_codecs, name) == NULL);
66 handle = g_malloc(sizeof (struct codec_handle));
68 handle->init_fn = init_fn;
69 handle->release_fn = release_fn;
70 handle->decode_fn = decode_fn;
72 g_hash_table_insert(registered_codecs, (gpointer)name, (gpointer) handle);
75 void *codec_init(codec_handle_t codec)
77 if (!codec) return NULL;
78 return (codec->init_fn)();
81 void codec_release(codec_handle_t codec, void *context)
84 (codec->release_fn)(context);
87 int codec_decode(codec_handle_t codec, void *context, const void *input, int inputSizeBytes, void *output, int *outputSizeBytes)
90 return (codec->decode_fn)(context, input, inputSizeBytes, output, outputSizeBytes);