audio.h

00001 // Common header for audiorx/audiotx. 
00002 // A simple and amusing application for testing basic features of ccRTP.
00003 // Copyright (C) 2001,2002  Federico Montesino <fedemp@altern.org>
00004 //  
00005 // This program is free software; you can redistribute it and/or modify
00006 // it under the terms of the GNU General Public License as published by
00007 // the Free Software Foundation; either version 2 of the License, or
00008 // (at your option) any later version.
00009 //  
00010 // This program is distributed in the hope that it will be useful,
00011 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00012 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00013 // GNU General Public License for more details.
00014 //  
00015 // You should have received a copy of the GNU General Public License
00016 // along with this program; if not, write to the Free Software
00017 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00018 
00023 // audiorx and audiotx are, respectively, the transmitter and receiver of
00024 // a simple application for testing ccRTP with audio. It aims to
00025 // transmit/receive \mu-law encoded audio on RTP packets.
00026 
00027 
00028 // UDP/RTP ports 
00029 const int RECEIVER_BASE = 22222;
00030 const int TRANSMITTER_BASE = 33334;
00031 
00032 // We will sample at 8 Khz using \mu-law encoding
00033 const int SAMPLING_RATE = 8000;
00034 
00035 // Transmission interval between consecutive packets.  
00036 // Ideally, the interval should be 20 milliseconds
00037 const int PERIOD = 20;
00038 
00039 // Packets are 8000*20/1000 = 160 octects long. 
00040 const int PACKET_SIZE=SAMPLING_RATE*PERIOD/1000;

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