/*
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* Copyright (c) 2010-2019 Belledonne Communications SARL.
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*
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* This file is part of oRTP.
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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 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 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, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* \file telephonyevents.h
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* \brief Receiving and sending telephone events (RFC2833)
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*
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**/
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#ifndef TELEPHONYEVENTS_H
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#define TELEPHONYEVENTS_H
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#include <ortp/rtpsession.h>
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struct _telephone_event
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{
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#ifdef ORTP_BIGENDIAN
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uint32_t event:8;
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uint32_t E:1;
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uint32_t R:1;
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uint32_t volume:6;
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uint32_t duration:16;
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#else
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uint32_t event:8;
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uint32_t volume:6;
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uint32_t R:1;
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uint32_t E:1;
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uint32_t duration:16;
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#endif
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};
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typedef struct _telephone_event telephone_event_t;
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* tell if the session supports telephony events. For this the telephony events payload_type
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must be present in the rtp profile used by the session */
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/* low level functions */
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ORTP_PUBLIC int rtp_session_telephone_events_supported(RtpSession *session);
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ORTP_PUBLIC int rtp_session_send_telephone_events_supported(RtpSession *session);
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ORTP_PUBLIC int rtp_session_recv_telephone_events_supported(RtpSession *session);
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ORTP_PUBLIC mblk_t *rtp_session_create_telephone_event_packet(RtpSession *session, int start);
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ORTP_PUBLIC int rtp_session_add_telephone_event(RtpSession *session,
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mblk_t *packet, uint8_t event, int end, uint8_t volume, uint16_t duration);
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ORTP_PUBLIC int rtp_session_read_telephone_event(RtpSession *session,
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mblk_t *packet,telephone_event_t **tab);
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/* high level functions*/
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ORTP_PUBLIC int rtp_session_send_dtmf(RtpSession *session, char dtmf, uint32_t userts);
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ORTP_PUBLIC int rtp_session_send_dtmf2(RtpSession *session, char dtmf, uint32_t userts, int duration);
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/* for high level telephony event callback */
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ORTP_PUBLIC void rtp_session_check_telephone_events(RtpSession *session, mblk_t *m0);
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#ifdef __cplusplus
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}
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#endif
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/* the size allocated for telephony events packets */
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#define TELEPHONY_EVENTS_ALLOCATED_SIZE (4*sizeof(telephone_event_t))
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/* list of named events */
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#define TEV_DTMF_0 (0)
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#define TEV_DTMF_1 (1)
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#define TEV_DTMF_2 (2)
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#define TEV_DTMF_3 (3)
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#define TEV_DTMF_4 (4)
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#define TEV_DTMF_5 (5)
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#define TEV_DTMF_6 (6)
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#define TEV_DTMF_7 (7)
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#define TEV_DTMF_8 (8)
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#define TEV_DTMF_9 (9)
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#define TEV_DTMF_STAR (10)
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#define TEV_DTMF_POUND (11)
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#define TEV_DTMF_A (12)
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#define TEV_DTMF_B (13)
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#define TEV_DTMF_C (14)
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#define TEV_DTMF_D (15)
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#define TEV_FLASH (16)
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#endif
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