246 lines
6.8 KiB
C
246 lines
6.8 KiB
C
/* codecs.c
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* codecs interface 2007 Tomas Kukosa
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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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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "config.h"
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#include <glib.h>
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#include "codecs.h"
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#include "G711a/G711adecode.h"
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#include "G711u/G711udecode.h"
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#ifdef HAVE_SBC
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#include "sbc/sbc_private.h"
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#endif
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#ifdef HAVE_SPANDSP
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#include "G722/G722decode.h"
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#include "G726/G726decode.h"
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#endif
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#ifdef HAVE_BCG729
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#include "G729/G729decode.h"
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#endif
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#ifdef HAVE_PLUGINS
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static plugins_t *libwscodecs_plugins;
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static GSList *codecs_plugins = NULL;
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void
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codecs_register_plugin(const codecs_plugin *plug)
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{
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codecs_plugins = g_slist_prepend(codecs_plugins, (codecs_plugin *)plug);
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}
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static void
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call_plugin_register_codec_module(gpointer data, gpointer user_data _U_)
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{
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codecs_plugin *plug = (codecs_plugin *)data;
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if (plug->register_codec_module) {
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plug->register_codec_module();
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}
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}
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#endif /* HAVE_PLUGINS */
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/*
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* For all codec plugins, call their register routines.
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*/
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void
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codecs_init(void)
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{
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register_codec("g711U", codec_g711u_init, codec_g711u_release,
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codec_g711u_get_channels, codec_g711u_get_frequency, codec_g711u_decode);
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register_codec("g711A", codec_g711a_init, codec_g711a_release,
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codec_g711a_get_channels, codec_g711a_get_frequency, codec_g711a_decode);
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#ifdef HAVE_SPANDSP
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register_codec("g722", codec_g722_init, codec_g722_release,
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codec_g722_get_channels, codec_g722_get_frequency, codec_g722_decode);
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register_codec("G726-16", codec_g726_16_init, codec_g726_release,
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codec_g726_get_channels, codec_g726_get_frequency, codec_g726_decode);
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register_codec("G726-24", codec_g726_24_init, codec_g726_release,
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codec_g726_get_channels, codec_g726_get_frequency, codec_g726_decode);
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register_codec("G726-32", codec_g726_32_init, codec_g726_release,
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codec_g726_get_channels, codec_g726_get_frequency, codec_g726_decode);
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register_codec("G726-40", codec_g726_40_init, codec_g726_release,
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codec_g726_get_channels, codec_g726_get_frequency, codec_g726_decode);
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register_codec("AAL2-G726-16", codec_aal2_g726_16_init, codec_g726_release,
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codec_g726_get_channels, codec_g726_get_frequency, codec_g726_decode);
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register_codec("AAL2-G726-24", codec_aal2_g726_24_init, codec_g726_release,
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codec_g726_get_channels, codec_g726_get_frequency, codec_g726_decode);
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register_codec("AAL2-G726-32", codec_aal2_g726_32_init, codec_g726_release,
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codec_g726_get_channels, codec_g726_get_frequency, codec_g726_decode);
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register_codec("AAL2-G726-40", codec_aal2_g726_40_init, codec_g726_release,
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codec_g726_get_channels, codec_g726_get_frequency, codec_g726_decode);
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#endif
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#ifdef HAVE_BCG729
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register_codec("g729", codec_g729_init, codec_g729_release,
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codec_g729_get_channels, codec_g729_get_frequency, codec_g729_decode);
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#endif
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#ifdef HAVE_SBC
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register_codec("SBC", codec_sbc_init, codec_sbc_release,
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codec_sbc_get_channels, codec_sbc_get_frequency, codec_sbc_decode);
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#endif
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#ifdef HAVE_PLUGINS
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libwscodecs_plugins = plugins_init(WS_PLUGIN_CODEC);
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g_slist_foreach(codecs_plugins, call_plugin_register_codec_module, NULL);
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#endif /* HAVE_PLUGINS */
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}
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void
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codecs_cleanup(void)
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{
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#ifdef HAVE_PLUGINS
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g_slist_free(codecs_plugins);
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codecs_plugins = NULL;
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plugins_cleanup(libwscodecs_plugins);
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libwscodecs_plugins = NULL;
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#endif
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}
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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_get_channels_fn channels_fn;
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codec_get_frequency_fn frequency_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) ? (codec_handle_t)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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gboolean
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register_codec(const char *name, codec_init_fn init_fn, codec_release_fn release_fn,
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codec_get_channels_fn channels_fn, codec_get_frequency_fn frequency_fn,
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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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/* Make sure the registration is unique */
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if (g_hash_table_lookup(registered_codecs, name) != NULL)
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return FALSE; /* report an error, or have our caller do it? */
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handle = (struct codec_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->channels_fn = channels_fn;
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handle->frequency_fn = frequency_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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return TRUE;
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}
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/* Deregister a codec by name. */
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gboolean
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deregister_codec(const char *name)
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{
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gpointer key, value;
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if (registered_codecs && g_hash_table_lookup_extended(registered_codecs, name, &key, &value)) {
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g_hash_table_remove(registered_codecs, name);
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g_free(value);
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return TRUE;
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}
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return FALSE;
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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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unsigned codec_get_channels(codec_handle_t codec, void *context)
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{
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if (!codec) return 0;
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return (codec->channels_fn)(context);
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}
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unsigned codec_get_frequency(codec_handle_t codec, void *context)
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{
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if (!codec) return 0;
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return (codec->frequency_fn)(context);
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}
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size_t codec_decode(codec_handle_t codec, void *context, const void *input, size_t inputSizeBytes, void *output, size_t *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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/**
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* Get compile-time information for libraries used by libwscodecs.
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*/
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void codec_get_compiled_version_info(GString *str)
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{
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/* SBC */
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#ifdef HAVE_SBC
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g_string_append(str, ", with SBC");
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#else
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g_string_append(str, ", without SBC");
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#endif
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/* SpanDSP (G.722, G.726) */
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#ifdef HAVE_SPANDSP
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g_string_append(str, ", with SpanDSP");
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#else
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g_string_append(str, ", without SpanDSP");
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#endif
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/* BCG729 (G.729) */
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#ifdef HAVE_BCG729
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g_string_append(str, ", with bcg729");
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#else
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g_string_append(str, ", without bcg729");
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#endif
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}
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/*
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* Editor modelines - http://www.wireshark.org/tools/modelines.html
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*
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* Local variables:
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* c-basic-offset: 4
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* tab-width: 8
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* indent-tabs-mode: nil
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* End:
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*
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* vi: set shiftwidth=4 tabstop=8 expandtab:
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* :indentSize=4:tabSize=8:noTabs=true:
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*/
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