#!/bin/bash
MINBASE=/usr/local/minerva
VARLOG=/var/log/minerva
LOGSTUB=$VARLOG/mixer

date +"%F %H:%M CMD $0 $*" >>$VARLOG/bearskin/`basename $0`

if [ $# -le 1 ]; then
  echo "Usage: $0 <device> <command> <channel> [value]"
  echo "   command ::= get set inc dec store recall quiet loud"
  echo "   channel ::= master bass treble wave speaker linein microphone"
  echo "               cd recording linein1 linein2 linein3"
  echo "           ::= a filename, when doing store/recall"
  echo "           ::= a delta value when doing quiet/loud"
  exit -1
fi


MIXER=/usr/bin/aumix
CMD=$2
CHANNEL=$3
VALUE=$4

# Reference usage for finddev...
#
# We've sent (and presumably rcv'd) a request from the finddev call
# Therefore:
# 1. DEVICE is actually the output from that command, which we might
#    need and so reflect to the calling command.
# 2. We exit now with a code of '0'. All Bearskin commands must check
#    for 0. If they receive it, they must also exit immediately.

DEVICE=`$MINBASE/bin/finddev mixer $*`
if [ $? == 0 ]; then
  echo $DEVICE
  exit 0;
fi



# Do general purpose commands (without channel designations)
case "$CMD" in
  init)
     touch $LOGSTUB.lst 
     echo 0 >$LOGSTUB.mut
     $MIXER -f $LOGSTUB.mix -S
     chgrp minerva $LOGSTUB.lst $LOGSTUB.mix $LOGSTUB.mut
     chmod ug+rw   $LOGSTUB.lst $LOGSTUB.mix $LOGSTUB.mut
     exit 0
     ;;

  enumdev)
     $MINBASE/bin/enumdev mixer
     exit $?
     ;;

  quiet)
     # re-use channel as value parameter
     if [ "$CHANNEL" == "" ]; then
        CHANNEL=30
     fi
     $0 $DEVICE dec master $CHANNEL
     exit 0
     ;;

  loud)
     if [ "$CHANNEL" == "" ]; then
        CHANNEL=30
     fi
     $0 $DEVICE inc master $CHANNEL
     exit 0
     ;;

  store)
     $MIXER -f $CHANNEL -S
     exit 0
     ;;

  recall)
     $MIXER -f $CHANNEL -L >/dev/null
     exit 0
     ;;

  mute)
     # don't mute it twice, or we'll overwrite the settings
     if [ "`$0 $DEVICE ismute`" == "0" ]; then
        $MIXER -f $LOGSTUB.mix -S
        $0 $DEVICE set master 0
        echo 1 >$LOGSTUB.mut
     fi
     exit 0
     ;;
  unmute)
     $MIXER -f $LOGSTUB.mix -L >/dev/null
     echo 0 >$LOGSTUB.mut
     exit 0
     ;;
  ismute)
     if [ -f $LOGSTUB.mut ]; then
        cat $LOGSTUB.mut
     else
        echo 0
     fi
     exit 0
     ;;
  toggle)
     if [ "`$0 $DEVICE ismute`" == "1" ]; then
        $MINBASE/bin/mixer default unmute
     else
        $MINBASE/bin/mixer default mute
     fi
     exit 0
     ;;
esac

# Patch device to match the devices
# (currently, we assume one mixer)
if [ "$DEVICE" == "default" ]; then
   DEVICE=
fi

# Anything left must be a channel command, so this will
# fail if no channel is specified

# So first remap the channels, if appropriate
CHANNEL=`$MINBASE/etc/mixer.conf $CHANNEL`
SAVEIFS=$IFS
 IFS=","
 declare -a CHANNEL_ARRAY=($CHANNEL)
IFS=$SAVEIFS

for CHNL in ${CHANNEL_ARRAY[@]}
do
   case "$CHNL" in
     master)
       CHN=v
       ;; 
     bass)
       CHN=b
       ;; 
     treble)
       CHN=t
       ;; 
     wave)
       CHN=w
       ;; 
     speaker)
       CHN=p
       ;; 
     linein)
       CHN=l
       ;; 
     microphone)
       CHN=m
       ;; 
     cd)
       CHN=c
       ;; 
     recording)
       CHN=r
       ;; 
     linein1)
       CHN=1
       ;; 
     linein2)
       CHN=1
       ;; 
     linein3)
       CHN=1
       ;; 
     *)
       CHN=
       ;;
   esac
   
   if [ "$CHN" != "" ]; then
      case "$CMD" in
         get)
            $MIXER -$CHN q $DEVICE | sed 's/\,.*//' |  sed 's/[^0-9]\+//'
            ;;
         set)
            $MIXER -$CHN $VALUE $DEVICE
            ;;
         inc)
            $MIXER -$CHN +$VALUE $DEVICE
            ;;
         dec)
            $MIXER -$CHN -$VALUE $DEVICE
            ;;
         *)
            ;;
      esac
   
   fi
done

# Write the last command into a mini-log.
# (not essential, just an amusing feature)
@echo $CMD $CHN $VALUE >$LOGSTUB.lst 2>/dev/null



