2 The oRTP library is an RTP (Realtime Transport Protocol - rfc3550) stack.
3 Copyright (C) 2001 Simon MORLAT simon.morlat@linphone.org
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 This library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with this library; if not, write to the Free Software
17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 * \file telephonyevents.h
22 * \brief Receiving and sending telephone events (RFC2833)
27 #ifndef TELEPHONYEVENTS_H
28 #define TELEPHONYEVENTS_H
30 #include <ortp/rtpsession.h>
33 struct _telephone_event
50 typedef struct _telephone_event telephone_event_t;
56 /* tell if the session supports telephony events. For this the telephony events payload_type
57 must be present in the rtp profile used by the session */
59 /* low level functions */
60 int rtp_session_telephone_events_supported(RtpSession *session);
61 int rtp_session_send_telephone_events_supported(RtpSession *session);
62 int rtp_session_recv_telephone_events_supported(RtpSession *session);
64 mblk_t *rtp_session_create_telephone_event_packet(RtpSession *session, int start);
66 int rtp_session_add_telephone_event(RtpSession *session,
67 mblk_t *packet, uint8_t event, int end, uint8_t volume, uint16_t duration);
69 int rtp_session_read_telephone_event(RtpSession *session,
70 mblk_t *packet,telephone_event_t **tab);
72 /* high level functions*/
73 int rtp_session_send_dtmf(RtpSession *session, char dtmf, uint32_t userts);
74 int rtp_session_send_dtmf2(RtpSession *session, char dtmf, uint32_t userts, int duration);
75 /* for high level telephony event callback */
76 void rtp_session_check_telephone_events(RtpSession *session, mblk_t *m0);
82 /* the size allocated for telephony events packets */
83 #define TELEPHONY_EVENTS_ALLOCATED_SIZE (4*sizeof(telephone_event_t))
85 /* list of named events */
86 #define TEV_DTMF_0 (0)
87 #define TEV_DTMF_1 (1)
88 #define TEV_DTMF_2 (2)
89 #define TEV_DTMF_3 (3)
90 #define TEV_DTMF_4 (4)
91 #define TEV_DTMF_5 (5)
92 #define TEV_DTMF_6 (6)
93 #define TEV_DTMF_7 (7)
94 #define TEV_DTMF_8 (8)
95 #define TEV_DTMF_9 (9)
96 #define TEV_DTMF_STAR (10)
97 #define TEV_DTMF_POUND (11)
98 #define TEV_DTMF_A (12)
99 #define TEV_DTMF_B (13)
100 #define TEV_DTMF_C (14)
101 #define TEV_DTMF_D (15)
102 #define TEV_FLASH (16)