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#!/bin/bash
# Support for amixer controls
# Written by: Dominique Michel <dominique_libre@sourceforge.net>
#
# Usage:
# PipeRead "AmixerControl $[infostore.SoundCard] $[infostore.SoundDevice]
# The hardware current volume step:
CurrentVol=`amixer -c $1 cget numid="$2"|grep ": values"|sed -e "s:.*values=::" -e "s:,.*::"`
# The minimum level of the volume:
CVolMin=`amixer -c $1 cget numid="$2"|grep dBscale|sed -e "s:.*dBscale-min=::" -e "s:dB.*::"`
# The hardware step level:
CStepLevel=`amixer -c $1 cget numid="$2"|grep dBscale|sed -e "s:.*step=::" -e "s:dB.*::"`
# 14 13 7
ndB=`echo "${CVolMin} + ( ${CurrentVol} * ${CStepLevel} )"|bc -l|awk '{printf "%.2f\n", $0}'`
echo "InfoStoreAdd CurrentdBVolume ${ndB}"
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