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/* codecs.c
* codecs interface 2007 Tomas Kukosa
*
* $Id$
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <glib.h>
#include "codecs.h"
struct codec_handle {
const char *name;
codec_init_fn init_fn;
codec_release_fn release_fn;
codec_decode_fn decode_fn;
};
/*
* List of registered codecs.
*/
static GHashTable *registered_codecs = NULL;
/* Find a registered codec by name. */
codec_handle_t
find_codec(const char *name)
{
return (registered_codecs) ? (codec_handle_t)g_hash_table_lookup(registered_codecs, name) : NULL;
}
/* Register a codec by name. */
void
register_codec(const char *name, codec_init_fn init_fn, codec_release_fn release_fn, codec_decode_fn decode_fn)
{
struct codec_handle *handle;
/* Create our hash table if it doesn't already exist */
if (registered_codecs == NULL) {
registered_codecs = g_hash_table_new(g_str_hash, g_str_equal);
g_assert(registered_codecs != NULL);
}
/* Make sure the registration is unique */
g_assert(g_hash_table_lookup(registered_codecs, name) == NULL);
handle = (struct codec_handle *)g_malloc(sizeof (struct codec_handle));
handle->name = name;
handle->init_fn = init_fn;
handle->release_fn = release_fn;
handle->decode_fn = decode_fn;
g_hash_table_insert(registered_codecs, (gpointer)name, (gpointer) handle);
}
void *codec_init(codec_handle_t codec)
{
if (!codec) return NULL;
return (codec->init_fn)();
}
void codec_release(codec_handle_t codec, void *context)
{
if (!codec) return;
(codec->release_fn)(context);
}
int codec_decode(codec_handle_t codec, void *context, const void *input, int inputSizeBytes, void *output, int *outputSizeBytes)
{
if (!codec) return 0;
return (codec->decode_fn)(context, input, inputSizeBytes, output, outputSizeBytes);
}
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