Stow scripts

scripts/bin/audio/audio-lib.sh

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+# Mix names
+MONITOR_LEFT='A'
+MONITOR_RIGHT='B'
+HEADPHONE_01_LEFT='C'
+HEADPHONE_01_RIGHT='D'
+HEADPHONE_02_LEFT='E'
+HEADPHONE_02_RIGHT='F'
+BLANK_LEFT="G"
+BLANK_RIGHT='H'
+
+# Level constants
+MUTE='0'
+ZERO_DB='0db'
+
+# Formats a number to match the matrix numbering.
+function formatMatrixNum() {
+    printf "%02d" $1
+}
+
+# Returns audio card number with matching card name.
+function getCardNumber() {
+    echo $(cat /proc/asound/cards | grep -m 1 $1 | grep -Po '\d{1,2}' | head -1)
+}
+
+# Checks if the card exists and if not exits.
+#
+# $1 card name
+# $2 card number
+function checkCard() {
+    if [ -z "$2" ]; then
+	echo $1 not connected
+	exit 1
+    else
+	echo $1 found at hw:$2
+    fi
+}
+
+# Prints a list of all controls for the given sound card.
+function printControls() {
+    amixer -c $1 controls
+}
+
+# Sets a mix to a level.
+#
+# $1 card number
+# $2 matrix number
+# $3 mix channel
+function setMix() {
+    amixer -c $1 set "Mix $3 Input $(formatMatrixNum $2)" $4
+}
+
+
+# Sets the volume levels for a mono mix.
+#
+# $1 card number
+# $2 matrix number
+# $3 mix left channel
+# $4 mix right channel
+# $5 volume
+function setMonoMix() {
+    setMix $1 $2 $3 $5
+    setMix $1 $2 $4 $5
+}
+
+# Sets the volume levels for a stereo mix.
+#
+# $1 card number
+# $2 matrix number
+# $3 mix left channel
+# $4 mix right channel
+# $5 volume
+function setStereoMix() {
+    matrix=$2
+    setMix $1 $matrix       $3 $5
+    setMix $1 $matrix       $4 $MUTE
+    setMix $1 $((matrix+1)) $3 $MUTE
+    setMix $1 $((matrix+1)) $4 $5
+}
+
+
+# Sets the volume levels for a mono mix for several outputs.
+#
+# $1 card number
+# $2 matrix number
+# $3 mix left channel
+# $4 mix right channel
+# $5 monitor volume
+# $6 first headphone volume
+# $7 second headphone volume
+function setMono() {
+    monitor=$3
+    headphone1=$4
+    headphone2=$5
+    if [ -n $headphone1 ]; then headphone1=$monitor; fi
+    if [ -n $headphone2 ]; then headphone2=$monitor; fi
+    setMonoMix $1 $2 $MONITOR_LEFT      $MONITOR_RIGHT      $monitor
+    setMonoMix $1 $2 $HEADPHONE_01_LEFT $HEADPHONE_01_RIGHT $headphone1
+    setMonoMix $1 $2 $HEADPHONE_02_LEFT $HEADPHONE_02_RIGHT $headphone2
+    setMonoMix $1 $2 $BLANK_LEFT        $BLANK_RIGHT        $MUTE
+}
+
+# Sets the volume levels for a stereo mix for several outputs.
+#
+# $1 card number
+# $2 matrix number
+# $3 mix left channel
+# $4 mix right channel
+# $5 monitor volume
+# $6 first headphone volume
+# $7 second headphone volume
+function setStereo() {
+    monitor=$3
+    headphone1=$4
+    headphone2=$5
+    if [ -n $headphone1 ]; then headphone1=$monitor; fi
+    if [ -n $headphone2 ]; then headphone2=$monitor; fi
+    setStereoMix $1 $2 $MONITOR_LEFT      $MONITOR_RIGHT      $monitor
+    setStereoMix $1 $2 $HEADPHONE_01_LEFT $HEADPHONE_01_RIGHT $headphone1
+    setStereoMix $1 $2 $HEADPHONE_02_LEFT $HEADPHONE_02_RIGHT $headphone2
+    setStereoMix $1 $2 $BLANK_LEFT        $BLANK_RIGHT        $MUTE
+}