/usr/include/libroar/vio_rtp.h is in libroar-dev 1.0~beta11-10.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/*
* Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2010-2014
*
* This file is part of libroar a part of RoarAudio,
* a cross-platform sound system for both, home and professional use.
* See README for details.
*
* This file is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3
* as published by the Free Software Foundation.
*
* libroar 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 software; see the file COPYING. If not, write to
* the Free Software Foundation, 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
* NOTE for everyone want's to change something and send patches:
* read README and HACKING! There a addition information on
* the license of this document you need to read before you send
* any patches.
*
* NOTE for uses of non-GPL (LGPL,...) software using libesd, libartsc
* or libpulse*:
* The libs libroaresd, libroararts and libroarpulse link this lib
* and are therefore GPL. Because of this it may be illigal to use
* them with any software that uses libesd, libartsc or libpulse*.
*/
#ifndef _LIBROARVIO_RTP_H_
#define _LIBROARVIO_RTP_H_
#include "libroar.h"
#define ROAR_RTP_FLAG_PADDING 0x02
#define ROAR_RTP_FLAG_EXTENSION 0x03
#define ROAR_RTP_FLAG_MARKER 0x08
/*
RFC 3551 RTP A/V Profile July 2003
PT encoding media type clock rate channels
name (Hz)
___________________________________________________
0 PCMU A 8,000 1
1 reserved A
2 reserved A
3 GSM A 8,000 1
4 G723 A 8,000 1
5 DVI4 A 8,000 1
6 DVI4 A 16,000 1
7 LPC A 8,000 1
8 PCMA A 8,000 1
9 G722 A 8,000 1
10 L16 A 44,100 2
11 L16 A 44,100 1
12 QCELP A 8,000 1
13 CN A 8,000 1
14 MPA A 90,000 (see text)
15 G728 A 8,000 1
16 DVI4 A 11,025 1
17 DVI4 A 22,050 1
18 G729 A 8,000 1
19 reserved A
20 unassigned A
21 unassigned A
22 unassigned A
23 unassigned A
dyn G726-40 A 8,000 1
dyn G726-32 A 8,000 1
dyn G726-24 A 8,000 1
dyn G726-16 A 8,000 1
dyn G729D A 8,000 1
dyn G729E A 8,000 1
dyn GSM-EFR A 8,000 1
dyn L8 A var. var.
dyn RED A (see text)
dyn VDVI A var. 1
Table 4: Payload types (PT) for audio encodings
*/
#define ROAR_RTP_PT_A_PCMU 0 /* mu-Law */
#define ROAR_RTP_PT_A_PCMA 8 /* A-Law */
#define ROAR_RTP_PT_A_L16_441_2 10
#define ROAR_RTP_PT_A_L16_441_1 11
#define ROAR_RTP_PT_UNKNOWN 127 /* non standard asignment */
struct roar_rtp_header {
int version;
int flags;
int csrc_count;
int payload_type;
uint16_t seq_num;
uint32_t ts;
uint32_t ssrc;
uint32_t csrc[16];
};
struct roar_rtp_inst {
struct roar_vio_calls * vio;
struct roar_rtp_header header;
struct roar_buffer * io;
struct roar_audio_info info;
size_t mtu;
int bpf; // byte per frame
// read speific things
struct roar_buffer * rx_decoded; // buffer to hold already decoded data
};
int roar_vio_open_rtp (struct roar_vio_calls * calls, struct roar_vio_calls * dst,
char * dstr, struct roar_vio_defaults * odef);
ssize_t roar_vio_rtp_read (struct roar_vio_calls * vio, void *buf, size_t count);
ssize_t roar_vio_rtp_write (struct roar_vio_calls * vio, void *buf, size_t count);
int roar_vio_rtp_sync (struct roar_vio_calls * vio);
int roar_vio_rtp_ctl (struct roar_vio_calls * vio, roar_vio_ctl_t cmd, void * data);
int roar_vio_rtp_close (struct roar_vio_calls * vio);
#endif
//ll
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