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/*
* (C) 2010 by Andreas Eversberg <jolly@eversberg.eu>
*
* All Rights Reserved
*
* 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 <stdlib.h>
#include <osmocom/core/msgb.h>
#include <osmocom/codec/codec.h>
#include <osmocom/bb/common/osmocom_data.h>
#include <osmocom/bb/mobile/mncc.h>
#include <osmocom/bb/mobile/voice.h>
/*
* receive voice
*/
static int gsm_recv_voice(struct osmocom_ms *ms, struct msgb *msg)
{
struct gsm_data_frame *mncc;
/* Drop the l1ctl_info_dl header */
msgb_pull_to_l2(msg);
/* push mncc header in front of data */
mncc = (struct gsm_data_frame *)
msgb_push(msg, sizeof(struct gsm_data_frame));
mncc->msg_type = GSM_TCHF_FRAME_EFR;
mncc->callref = ms->mncc_entity.ref;
/* HACK: send voice frame back */
gsm_send_voice(ms, mncc);
/* distribute and then free */
if (ms->mncc_entity.mncc_recv && ms->mncc_entity.ref) {
ms->mncc_entity.mncc_recv(ms, mncc->msg_type, mncc);
}
msgb_free(msg);
return 0;
}
/*
* send voice
*/
int gsm_send_voice(struct osmocom_ms *ms, struct gsm_data_frame *data)
{
struct msgb *nmsg;
nmsg = msgb_alloc_headroom(GSM_EFR_BYTES + 64, 64, "TCH/F");
if (!nmsg)
return -ENOMEM;
nmsg->l2h = msgb_put(nmsg, GSM_EFR_BYTES);
memcpy(nmsg->l2h, data->data, GSM_EFR_BYTES);
return gsm48_rr_tx_voice(ms, nmsg);
}
/*
* init
*/
int gsm_voice_init(struct osmocom_ms *ms)
{
ms->l1_entity.l1_traffic_ind = gsm_recv_voice;
return 0;
}
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