32 lines
720 B
Bash
Executable File
32 lines
720 B
Bash
Executable File
#!/bin/sh
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# Check args
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if [ ${#} -ne 1 ]; then
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echo "Usage: ${0} new_volume_percentage"
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exit 1
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fi
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# Check value's range
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if [ ${1} -gt 100 ]; then
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echo "Usage: Wrong volume percentage (${1}), must be between 0 and 100"
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exit 1
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fi
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# Scale new volume value between 0 and 63
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volume_percent=${1}
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volume_scaled=$(echo "a = ${1} * 63 / 100 + 0.5; scale = 0; a / 1" | bc -l)
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# Get current value
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current_volume=$(volume_get)
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# Turn on/off ampli if necessary
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if [ ${current_volume} -eq 0 -a ${volume_scaled} -ne 0 ]; then
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start_audio_amp 1
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elif [ ${current_volume} -ne 0 -a ${volume_scaled} -eq 0 ]; then
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start_audio_amp 0
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fi
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# Set new volume
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amixer -q sset 'Headphone' ${volume_scaled} unmute
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exit 0
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