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