/*  The oRTP library is an RTP (Realtime Transport Protocol - rfc3550) stack.  Copyright (C) 2001  Simon MORLAT simon.morlat@linphone.org  This library is free software; you can redistribute it and/or  modify it under the terms of the GNU Lesser General Public  License as published by the Free Software Foundation; either  version 2.1 of the License, or (at your option) any later version.  This library 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  Lesser General Public License for more details.  You should have received a copy of the GNU Lesser General Public  License along with this library; if not, write to the Free Software  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA*/#ifndef TELEPHONYEVENTS_H#define TELEPHONYEVENTS_H#include <ortp/rtpsession.h>struct _telephone_event{#ifdef ORTP_BIGENDIAN	uint32_t event:8;	uint32_t E:1;	uint32_t R:1;	uint32_t volume:6;	uint32_t duration:16;#else	uint32_t event:8;	uint32_t volume:6;	uint32_t R:1;	uint32_t E:1;	uint32_t duration:16;#endif};typedef struct _telephone_event telephone_event_t;#ifdef __cplusplusextern "C" {#endifextern PayloadType	payload_type_telephone_event;/* tell if the session supports telephony events. For this the telephony events payload_type 	must be present in the rtp profile used by the session */	/* low level functions */	int rtp_session_telephone_events_supported(RtpSession *session);mblk_t	*rtp_session_create_telephone_event_packet(RtpSession *session, int start);int rtp_session_add_telephone_event(RtpSession *session,			mblk_t *packet, uint8_t event, int end, uint8_t volume, uint16_t duration);			int rtp_session_read_telephone_event(RtpSession *session,		mblk_t *packet,telephone_event_t **tab);/* high level functions*/int rtp_session_send_dtmf(RtpSession *session, char dtmf, uint32_t userts);/* for high level telephony event callback */void rtp_session_check_telephone_events(RtpSession *session, mblk_t *m0);#ifdef __cplusplus}#endif	/* the size allocated for telephony events packets */#define TELEPHONY_EVENTS_ALLOCATED_SIZE		(4*sizeof(telephone_event_t))/* list of named events */#define TEV_DTMF_0			(0)#define TEV_DTMF_1			(1)#define TEV_DTMF_2			(2)#define TEV_DTMF_3			(3)#define TEV_DTMF_4			(4)#define TEV_DTMF_5			(5)#define TEV_DTMF_6			(6)#define TEV_DTMF_7			(7)#define TEV_DTMF_8			(8)#define TEV_DTMF_9			(9)#define TEV_DTMF_STAR		(10)#define TEV_DTMF_POUND		(11)#define TEV_DTMF_A			(12)#define TEV_DTMF_B			(13)#define TEV_DTMF_C			(14)#define TEV_DTMF_D			(15)#define TEV_FLASH			(16)#endif