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