121 lines
4.0 KiB
C
121 lines
4.0 KiB
C
/* Filter/overlay codec and CSD bearer service selections for voice calls/CSD,
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* across MS, RAN and CN limitations
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*
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* (C) 2023 by sysmocom - s.f.m.c. GmbH <info@sysmocom.de>
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* All Rights Reserved
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*
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* Author: Oliver Smith
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*
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* SPDX-License-Identifier: AGPL-3.0+
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (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 Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <osmocom/msc/transaction_cc.h>
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#include <osmocom/msc/codec_filter.h>
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#include <osmocom/msc/csd_filter.h>
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void trans_cc_filter_init(struct gsm_trans *trans)
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{
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trans->cc.codecs = (struct codec_filter){};
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trans->cc.csd = (struct csd_filter){};
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}
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void trans_cc_filter_set_ran(struct gsm_trans *trans, enum osmo_rat_type ran_type)
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{
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codec_filter_set_ran(&trans->cc.codecs, ran_type);
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csd_filter_set_ran(&trans->cc.csd, ran_type);
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}
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void trans_cc_filter_set_bss(struct gsm_trans *trans, struct msc_a *msc_a)
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{
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codec_filter_set_bss(&trans->cc.codecs, &msc_a->cc.compl_l3_codec_list_bss_supported);
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/* For CSD, there is no list of supported bearer services passed in
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* Complete Layer 3. TODO: make it configurable? */
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}
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void _trans_cc_filter_run(const char *file, int line, struct gsm_trans *trans)
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{
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switch (trans->bearer_cap.transfer) {
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case GSM48_BCAP_ITCAP_SPEECH:
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codec_filter_run(&trans->cc.codecs, &trans->cc.local, &trans->cc.remote);
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LOG_TRANS_CAT_SRC(trans, DCC, LOGL_DEBUG, file, line, "codecs: %s\n",
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codec_filter_to_str(&trans->cc.codecs, &trans->cc.local, &trans->cc.remote));
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break;
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case GSM48_BCAP_ITCAP_3k1_AUDIO:
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case GSM48_BCAP_ITCAP_FAX_G3:
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case GSM48_BCAP_ITCAP_UNR_DIG_INF:
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csd_filter_run(&trans->cc.csd, &trans->cc.local, &trans->cc.remote);
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LOG_TRANS_CAT_SRC(trans, DCC, LOGL_DEBUG, file, line, "codec/BS: %s\n",
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csd_filter_to_str(&trans->cc.csd, &trans->cc.local, &trans->cc.remote));
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break;
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default:
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LOG_TRANS_CAT_SRC(trans, DCC, LOGL_ERROR, file, line,
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"Handling of information transfer capability %d not implemented\n",
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trans->bearer_cap.transfer);
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break;
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}
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}
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void trans_cc_filter_set_ms_from_bc(struct gsm_trans *trans, const struct gsm_mncc_bearer_cap *bcap)
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{
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trans->cc.codecs.ms = (struct sdp_audio_codecs){0};
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trans->cc.csd.ms = (struct csd_bs_list){0};
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if (!bcap)
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return;
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switch (bcap->transfer) {
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case GSM48_BCAP_ITCAP_SPEECH:
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sdp_audio_codecs_from_bearer_cap(&trans->cc.codecs.ms, bcap);
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break;
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case GSM48_BCAP_ITCAP_3k1_AUDIO:
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case GSM48_BCAP_ITCAP_FAX_G3:
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case GSM48_BCAP_ITCAP_UNR_DIG_INF:
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sdp_audio_codecs_set_csd(&trans->cc.codecs.ms);
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csd_bs_list_from_bearer_cap(&trans->cc.csd.ms, bcap);
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break;
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default:
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LOG_TRANS(trans, LOGL_ERROR, "Handling of information transfer capability %d not implemented\n",
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bcap->transfer);
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break;
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}
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}
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void trans_cc_set_remote_from_bc(struct gsm_trans *trans, const struct gsm_mncc_bearer_cap *bcap)
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{
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trans->cc.remote.audio_codecs = (struct sdp_audio_codecs){0};
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trans->cc.remote.bearer_services = (struct csd_bs_list){0};
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if (!bcap)
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return;
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switch (bcap->transfer) {
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case GSM48_BCAP_ITCAP_SPEECH:
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sdp_audio_codecs_from_bearer_cap(&trans->cc.remote.audio_codecs, bcap);
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break;
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case GSM48_BCAP_ITCAP_3k1_AUDIO:
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case GSM48_BCAP_ITCAP_FAX_G3:
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case GSM48_BCAP_ITCAP_UNR_DIG_INF:
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sdp_audio_codecs_set_csd(&trans->cc.remote.audio_codecs);
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csd_bs_list_from_bearer_cap(&trans->cc.remote.bearer_services, bcap);
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break;
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default:
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LOG_TRANS(trans, LOGL_ERROR, "Handling of information transfer capability %d not implemented\n",
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bcap->transfer);
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break;
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}
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}
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