127 lines
4.0 KiB
Bash
Executable File
127 lines
4.0 KiB
Bash
Executable File
#!/bin/bash
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#### v4l2 control library
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#### webcamd - A webcam Service for multiple Cams and Stream Services.
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####
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#### Written by Stephan Wendel aka KwadFan <me@stephanwe.de>
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#### Copyright 2021
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#### https://github.com/mainsail-crew/crowsnest
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####
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#### This File is distributed under GPLv3
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####
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#### Description: Configure Cam with v4l2-ctl options
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#### ex.: v4l2-ctl -c brightness=100
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# shellcheck enable=require-variable-braces
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# Exit upon Errors
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set -eE
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function v4l2_control {
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log_msg "V4L2 Control:"
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function main {
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local device v4l2ctl valueless opt_avail
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for cam in $(configured_cams); do
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# get device from cam section
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device="$(get_param "cam ${cam}" device)"
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# get v4l2ctl parameters
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v4l2ctl="$(get_param "cam ${cam}" v4l2ctl)"
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# if not empty do
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if [ -n "${v4l2ctl}" ]; then
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# Write configured options to Log
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log_msg "Device: [cam ${cam}]"
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log_msg "Options: ${v4l2ctl}"
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# Split options to array
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IFS=',' read -ra opt < <(echo "${v4l2ctl}"); unset IFS
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# loop through options
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for param in "${opt[@]}"; do
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# parameter available for device
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# needs || true to prevent script to exit
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valueless="$(echo "${param}" | cut -d "=" -f1)"
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opt_avail="$(v4l2-ctl -d "${device}" -L | \
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grep -c "${valueless}" || true)"
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if [ "${opt_avail}" -eq "0" ]; then
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log_msg "Parameter '${param}' not available for '${device}'. Skipped."
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else
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v4l2-ctl -d "${device}" -c "${param}" 2> /dev/null
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fi
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done
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if [ "$(log_level)" == "debug" ]; then
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v4l2-ctl -d "${device}" -L | log_output "v4l2ctl"
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fi
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else
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log_msg "No parameters set for [cam ${cam}]. Skipped."
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fi
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done
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}
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### MAIN
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main
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}
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function brokenfocus {
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# checks if "focus_absolute" is configured
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# call if_focus_absolute <mycamnameornumber>
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# returns 1 = true, 0 = false
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function if_focus_absolute {
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local cam
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cam="${1}"
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get_param "cam ${cam}" v4l2ctl | grep -c "focus_absolute"
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}
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# call get_conf_value <mycamnameornumber>
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# spits out value from config file
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function get_conf_value {
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local cam conf_val
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local -a params
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cam="${1}"
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conf_val="$(get_param "cam ${cam}" v4l2ctl)"
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if [ -n "${conf_val}" ]; then
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IFS=','; read -ra params <<< "${conf_val}"
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unset IFS
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for i in "${params[@]}"; do
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grep "focus_absolute" <<< "${i}" || true
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done
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fi
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}
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# call get_current_value <device>
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# ex.: get_current_value /dev/video0
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# spits out focus_absolute=20 ( if set to 20 )
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function get_current_value {
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v4l2-ctl -d "${1}" -C "focus_absolute" | sed 's/:[[:space:]]/=/'
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}
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# call set_current_value <device> <value>
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# ex.: set_current_value /dev/video0 focus_absolute=30
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function set_focus_absolute {
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local device value
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device="${1}"
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value="${2}"
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v4l2-ctl -d "${device}" -c "${value}"
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}
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function main {
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local cur_val conf_val device
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for cam in $(configured_cams); do
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device="$(get_param "cam ${cam}" device)"
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cur_val="$(get_current_value "${device}")"
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conf_val="$(get_conf_value "${cam}")"
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if [ "$(if_focus_absolute "${cam}")" == "1" ] &&
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[ "${cur_val}" != "${conf_val}" ]; then
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detected_broken_dev_msg
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set_focus_absolute "${device}" "${conf_val}"
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fi
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if [ "$(log_level)" == "debug" ] && [ -n "${cur_val}" ]; then
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debug_focus_val_msg "$(get_current_value "${device}")"
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fi
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done
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}
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### MAIN
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main
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}
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