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Diffstat (limited to 'src/audio/rtp_telephone_event.h')
| -rw-r--r-- | src/audio/rtp_telephone_event.h | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/src/audio/rtp_telephone_event.h b/src/audio/rtp_telephone_event.h new file mode 100644 index 0000000..372504c --- /dev/null +++ b/src/audio/rtp_telephone_event.h @@ -0,0 +1,79 @@ +/* + Copyright (C) 2005-2009 Michel de Boer <michel@twinklephone.com> + + 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +*/ + +// RFC 2833 +// RTP payload format for DTMF telephone events + +#ifndef _RTP_TELEPHONE_EVENT_H +#define _RTP_TELEPHONE_EVENT_H + + +// RFC 2833 3.10 +// DTMF events +#define TEL_EV_DTMF_0 0 +#define TEL_EV_DTMF_1 1 +#define TEL_EV_DTMF_2 2 +#define TEL_EV_DTMF_3 3 +#define TEL_EV_DTMF_4 4 +#define TEL_EV_DTMF_5 5 +#define TEL_EV_DTMF_6 6 +#define TEL_EV_DTMF_7 7 +#define TEL_EV_DTMF_8 8 +#define TEL_EV_DTMF_9 9 +#define TEL_EV_DTMF_STAR 10 +#define TEL_EV_DTMF_POUND 11 +#define TEL_EV_DTMF_A 12 +#define TEL_EV_DTMF_B 13 +#define TEL_EV_DTMF_C 14 +#define TEL_EV_DTMF_D 15 + +#define VALID_DTMF_EV(ev) ( (ev) <= TEL_EV_DTMF_D ) +#define VALID_DTMF_SYM(s) ( ((s) >= '0' && (s) <= '9') || \ + ((s) >= 'a' && (s) <= 'd') || \ + ((s) >= 'A' && (s) <= 'D') || \ + (s) == '*' || (s) == '#' ) + +// RFC 2833 3.5 +// Payload format (in network order!!) +struct t_rtp_telephone_event { +private: + unsigned char event : 8; + unsigned char volume : 6; + bool reserved : 1; + bool end : 1; + unsigned short duration : 16; + +public: + // Values set/get are in host order + void set_event(unsigned char _event); + void set_volume(unsigned char _volume); + void set_reserved(bool _reserved); + void set_end(bool _end); + void set_duration(unsigned short _duration); + + unsigned char get_event(void) const; + unsigned char get_volume(void) const; + bool get_reserved(void) const; + bool get_end(void) const; + unsigned short get_duration(void) const; +}; + +unsigned char char2dtmf_ev(char sym); +char dtmf_ev2char(unsigned char ev); + +#endif |