90 lines
2.5 KiB
C
90 lines
2.5 KiB
C
/* codecs.c
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* codecs interface 2007 Tomas Kukosa
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*
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* $Id$
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include <epan/codecs.h>
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struct codec_handle {
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const char *name;
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codec_init_fn init_fn;
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codec_release_fn release_fn;
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codec_decode_fn decode_fn;
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};
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/*
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* List of registered codecs.
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*/
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static GHashTable *registered_codecs = NULL;
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/* Find a registered codec by name. */
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codec_handle_t
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find_codec(const char *name)
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{
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return (registered_codecs) ? g_hash_table_lookup(registered_codecs, name) : NULL;
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}
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/* Register a codec by name. */
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void
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register_codec(const char *name, codec_init_fn init_fn, codec_release_fn release_fn, codec_decode_fn decode_fn)
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{
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struct codec_handle *handle;
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/* Create our hash table if it doesn't already exist */
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if (registered_codecs == NULL) {
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registered_codecs = g_hash_table_new(g_str_hash, g_str_equal);
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g_assert(registered_codecs != NULL);
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}
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/* Make sure the registration is unique */
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g_assert(g_hash_table_lookup(registered_codecs, name) == NULL);
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handle = g_malloc(sizeof (struct codec_handle));
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handle->name = name;
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handle->init_fn = init_fn;
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handle->release_fn = release_fn;
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handle->decode_fn = decode_fn;
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g_hash_table_insert(registered_codecs, (gpointer)name, (gpointer) handle);
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}
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void *codec_init(codec_handle_t codec)
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{
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if (!codec) return NULL;
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return (codec->init_fn)();
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}
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void codec_release(codec_handle_t codec, void *context)
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{
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if (!codec) return;
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(codec->release_fn)(context);
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}
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int codec_decode(codec_handle_t codec, void *context, const void *input, int inputSizeBytes, void *output, int *outputSizeBytes)
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{
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if (!codec) return 0;
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return (codec->decode_fn)(context, input, inputSizeBytes, output, outputSizeBytes);
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}
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