144 lines
4.1 KiB
Bash
Executable file
144 lines
4.1 KiB
Bash
Executable file
#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0-or-later
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# Copyright (C) 2021-present Fewtarius
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# 2021-present pkegg
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. /etc/profile
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set -e
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set -o pipefail
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LOG="/var/log/$(basename "$0").log"
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### Summary
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# This script listens to volume keys on the RG351MP and adjusts volume
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# Fn + Volume up/down will adjust brightness
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###
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# Event examples for reference
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# type 1 (EV_KEY), code 114 (KEY_VOLUMEDOWN), value 1
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# type 1 (EV_KEY), code 115 (KEY_VOLUMEUP), value 1
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VOL_EVENT='*(KEY_VOLUME*, value *' # This matches all volume events
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VOL_UP='*UP), value *' # Differentiate 'up' volume event
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VOL_DOWN='*DOWN), value *' #Differentiate 'down' volume event
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V_FUNC_KEY_EVENT='*('${DEVICE_VOL_MODIFIER}'), value *'
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# Matches if a button was pressed (1), released (0) or held down (2)
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PRESS='value [1-9]'
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RELEASE='value 0'
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# Volume repeat
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VOLUME_REPEAT_MOD=4
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# Brightness repeat
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BRIGHTNESS_REPEAT_MOD=4
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# Variable to keep track of Fn being currently pressed
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FUNC_PRESSED=no
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CONTROLLER_DISCONNECTED="*error reading: No such device"
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DEVICE_DISCONNECTED="*error reading: No such device"
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# Detect input devices automatically
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for DEV in /dev/input/ev*
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do
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unset SUPPORTS
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SUPPORTS=$(udevadm info ${DEV} | awk '/ID_INPUT_KEY=|ID_INPUT_JOYSTICK=/ {print $2}')
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if [ -n "${SUPPORTS}" ]
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then
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DEVICE=$(udevadm info ${DEV} | awk 'BEGIN {FS="="} /DEVNAME=/ {print $2}')
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INPUT_DEVICES+=("${DEVICE}")
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fi
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done
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# Logic:
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# - Listen to both:
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# - 'rg351' events to get volume keys (not part of the joystick api)
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# - 'joystick' events - as the V's 'fn' key is mapped to the joystick
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# - Switch statement keeps high level cases to only 'volume' and 'V function key'
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# this is to avoid processing for other events or creating a lot of cases as this will be called
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# for all button pushes
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# - Using 'read' means the loop is idle when no button is pressed
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(
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for INPUT_DEVICE in ${INPUT_DEVICES[@]}
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do
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evtest "${INPUT_DEVICE}" 2>&1 &
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done
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wait
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) | while read line; do
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case $line in
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(${CONTROLLER_DISCONNECTED})
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echo "Reloading due to ${CONTROLLER_DEVICE} reattach..." >${LOG} 2>&1
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exit 0
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;;
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(${DEVICE_DISCONNECTED})
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echo "Reloading due to ${DEVICE} reattach..." >${LOG} 2>&1
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exit 0
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;;
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(${VOL_EVENT})
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# We don't care when you 'let go' ('release') the volume button
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if [[ "$line" =~ ${RELEASE} ]]; then
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REPEAT_NUM=0
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continue
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fi
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# Setup for 'brightness' if Fn pressed
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if [[ "${FUNC_PRESSED}" == "yes" ]]; then
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COMMAND=/usr/bin/brightness
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UP="up"
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DOWN="down"
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REPEAT_MOD=${BRIGHTNESS_REPEAT_MOD}
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# Default to 'volume' if Fn is not pressed
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else
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COMMAND="/usr/bin/system_utils vol"
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UP="+"
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DOWN="-"
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REPEAT_MOD=${VOLUME_REPEAT_MOD}
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fi
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REPEAT_NUM=$(( ${REPEAT_NUM} + 1 ))
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# This isn't time to evaluate repeat so just skip
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if [[ "$line" == ${REPEAT_PRESS} && $(( ${REPEAT_NUM} % ${REPEAT_MOD} )) != "0" ]]; then
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continue
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fi
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INCREMENT_AMOUNT=5
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if [[ "${REPEAT_NUM}" -gt "20" ]]; then
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INCREMENT_AMOUNT=10
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fi
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# Run the commands to adjust volume/brightness
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if [[ "${line}" == ${VOL_UP} ]]; then
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${COMMAND} ${UP} ${INCREMENT_AMOUNT} > /dev/null
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elif [[ "${line}" == ${VOL_DOWN} ]]; then
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${COMMAND} ${DOWN} ${INCREMENT_AMOUNT} > /dev/null
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fi
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;;
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(${V_FUNC_KEY_EVENT})
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## We don't care about 'Fn' key repeats - continue
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#if [[ "$line" == ${REPEAT_PRESS} ]]; then
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# continue
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#fi
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#Reset the number of repeats when Fn is pressed/release
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# as repeat speed is different between volume/brightness
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REPEAT_NUM=0
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if [[ "${line}" =~ ${PRESS} ]]; then
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FUNC_PRESSED=yes
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elif [[ "${line}" == ${RELEASE} ]]; then
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FUNC_PRESSED=no
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fi
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;;
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esac
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done
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