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1 #!/bin/bash
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2
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3 # intercom
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4 #
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5 # Copyright (C) DFS Deutsche Flugsicherung (2004, 2005).
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6 # All Rights Reserved.
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7 # Author: Andre Adrian
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8 #
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9 # Voice-over-IP Intercom start skript for Linux with ALSA and OSS
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10 #
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11 # Version 0.4
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12 #
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13
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14 echo "usage: intercom [OPTIONS] [Partner1-IP [Partner2-IP ...]]"
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15 echo " -a value set ambient (background) noise to value decibel"
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16 # echo " -b value set Acoustic Echo Suppression to value decibel"
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17 echo " -e enable 2040Hz Sinustone for VHF transmitter"
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18 echo " -f Number Number of 20ms Frames in RTP packet"
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19 echo " -k use Packet Loss Concealment (PLC)"
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20 echo " -l use hardware AEC and Line-in for microphone"
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21 echo " -m use hardware AEC and Mic-in for microphone"
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22 echo " -p Number RTP Portnumber (default is 5004)"
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23 echo " -t Telephone conference (everybody with everybody else)"
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24 echo " -s Percent simulated packet loss"
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25 echo " -w visualize vector w"
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26 echo " -I use iLBC codec (default), can do PLC"
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27 echo " -A use G.711 A-law codec"
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28 echo " -U use G.711 u-law codec"
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29 echo " -6 use G.726 32kbps codec"
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30 echo " -G use GSM codec"
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31 echo " -S use Wideband Speex codec, can do PLC"
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32
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33 # disable screen saver
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34 xset s off
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35 xset -dpms
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36
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37 # delete old process
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38 killall -9 intercomd 2>/dev/null
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39 killall -9 intercomd1 2>/dev/null
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40
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41 # configure audio mixer (AC97 compatible)
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42 # check your mixer hardware with:
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43 # cat /dev/sndstat
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44 #
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45 # hardware AEC test was successful with on-board sound mixers:
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46 # Analog Devices AD1985, ICEnsemble ICE1232, Realtek ALC650 and ALC655,
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47 # SigmaTel STAC9750/51
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48 #
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49 # hardware AEC test was successful with PCI sound cards:
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50 # Soundblaster PCI128
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51 #
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52 # hardware AEC test failed with PCI sound cards:
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53 # Soundblaster Audigy 2, C-Media 8738
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54
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55 # set playback volume
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56 amixer -q sset 'PCM',0 70%
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57 amixer -q sset 'Master',0 70%
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58
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59 # use only PCM for playback
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60 amixer -q set 'Master',0 unmute
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61 amixer -q set 'PCM',0 unmute
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62 amixer -q set 'Mic',0 mute
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63 amixer -q set 'Line',0 mute
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64 amixer -q set 'CD',0 mute
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65 amixer -q set 'Aux',0 mute
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66
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67 # enable recording
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68 amixer -q cset iface=MIXER,name='Capture Switch' 1
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69 EXEC=intercomd
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70 WOPTION=320
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71 WSTART=0
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72
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73 # handle all options
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74 for argv in $* ;do
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75 # echo $argv
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76 case $argv in
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77 ("-l")
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78 # for Hardware AEC and Line-In Capture
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79 amixer -q set 'Capture',0 0%-,100%-
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80 amixer -q cset iface=MIXER,name='Capture Source' 4,5
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81 ;;
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82 ("-m")
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83 # for Hardware AEC and Mic-In Capture
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84 amixer -q set 'Capture',0 0%-,100%-
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85 amixer -q cset iface=MIXER,name='Capture Source' 0,5
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86 ;;
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87 ("-9")
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88 # other EXEC because of EFR G.729 link mismatch (same functionnames)
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89 EXEC=intercomd2
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90 ;;
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91 ("-S")
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92 # other EXEC because Speex is Wideband codec
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93 EXEC=intercomd1
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94 WOPTION=640
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95 ;;
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96 ("-w")
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97 # start wdisplay.tcl
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98 WSTART=1
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99 ;;
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100 esac
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101 done
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102
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103 # start wdisplay
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104 if test $WSTART -eq 1 ;then
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105 /usr/local/bin/wdisplay.tcl $WOPTION &
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106 sleep 1
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107 fi
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108
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109 # start audio/network daemon
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110 /usr/local/bin/$EXEC $* &
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111 sleep 1
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112
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113 # give audio/network daemon realtime process prio
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114 # enable this if you don't use hardware AEC
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115 # (setpriority is in RPM package rtstools)
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116 # sudo /usr/sbin/setpriority `pidof $EXEC` fifo 1
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117
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118 # To make sudo work without password add as superuser with the program
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119 # visudo:
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120 # %users ALL=(root) NOPASSWD: /usr/sbin/setpriority
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121
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122 # start graphical user interface
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123 # /usr/local/bin/intercom.tcl $* -geometry 800x600 &
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124 /usr/local/bin/intercom.tcl $* &
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125
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