bzr branch
http://bzr.ed.am/elec/audio-switcher
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8
by Tim Marston
updated notes, and added control shell script |
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#!/bin/bash |
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APP=`basename "$0"` |
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umask 002 |
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shopt -s nullglob |
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function die() |
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{
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[[ -n "$@" ]] && echo -e "$APP: $@" >&2 |
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exit 1 |
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} |
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function version |
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{
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echo "$APP: audio switch control, version 0.1" |
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} |
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function usage |
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{
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echo "Usage: $APP [OPTION]... COMMAND" |
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echo |
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echo "Options:" |
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echo " --quiet Do not complain on error" |
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echo " -v, --version Display version information" |
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echo " -h, --help This message" |
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echo |
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echo "Commands:" |
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echo " on Switch audio routing on" |
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echo " off Switch audio routing off" |
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#echo |
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# 01234567890123456789012345678901234567890123456789012345678901234567890123456789 |
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} |
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# defaults |
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QUIET=0 |
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# parse command line args |
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PROGRAMARGS=`getopt -n "$APP" -l device:,quiet,version,help vh "$@"` |
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[[ $? != 0 ]] && exit 1 |
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eval set -- "$PROGRAMARGS" |
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while true; do |
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case "$1" in |
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--quiet) QUIET=1; shift;; |
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-v|--version) version; exit 0;; |
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-h|--help) usage; exit 0;; |
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--) shift; break;; |
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esac |
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done |
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# check other args |
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[[ -z "$1" ]] && die "you did not specify a command, see --help" |
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[[ -n "$2" ]] && die "too many arguments, see --help" |
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# work out command |
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COMMAND= |
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case "$1" in |
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on) COMMAND=1;; |
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off) COMMAND=0;; |
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*) die "invalid comand, see --help";; |
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esac |
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# detect audio switch |
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DEVICES=`grep -l edam /sys/bus/usb/devices/*/manufacturer | sed 's/\/[^\/]*$//'` |
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DEVICES=`for DIR in "$DEVICES"; do grep -li ba7f "$DIR"/idProduct; done | sed 's/\/[^\/]*$//'` |
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DEVICES=`for DIR in "$DEVICES"; do grep -li 03eb "$DIR"/idVendor; done | sed 's/\/[^\/]*$//'` |
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DEVICES=`for DIR in "$DEVICES"; do [[ -d "$DIR":1.0/tty ]] && echo "$DIR":1.0/tty/*; done | sed 's/^.*\///'` |
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TEMP=( $DEVICES ) |
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[[ ${#TEMP[*]} -gt 1 ]] && die "more than one audio switch detetced, use --device"
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DEVICE=$DEVICES |
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# no device? |
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[[ -z "$DEVICE" ]] && die "audio switch not found" |
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[[ -c /dev/"$DEVICE" ]] || die "audio switch device should be there, but isn't!" |
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# do command |
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echo $COMMAND > /dev/$DEVICE |