//vio_rtp.h: /* * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2010-2013 * * 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 allready 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