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75 lines
2.3 KiB
C
75 lines
2.3 KiB
C
/*
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Copyright 2021 Karl Ragnar Giese, karl@giese.no
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This file is part of Dusk.
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Dusk is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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Dusk is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Dusk; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/* This file is meant for you change! The default uses your webcam to get an
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ambient light value, but you can change it to use whatever you want. For
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example you could connect an Arduino with a light sensor, connect your
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smart light switch, use the time, or whatever you want! Just make a function
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called lightvalue which returns an int from 0 to 100. */
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int lightvalue(){
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double brightness;
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sd_bus *userbus=NULL;
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sd_bus_message *sdbusmessage = NULL;
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/* start clight if it isn't running */
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if(system("pidof -x clight > /dev/null") != 0){
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printf("%s\n", "starting clight");
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system("clight --no-gamma --no-dimmer --no-dpms --no-kbd --no-auto-calib &");
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sleep(5);
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}
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/* get user dbus */
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sd_bus_default_user(&userbus);
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/* refresh clight */
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sd_bus_call_method(userbus,
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"org.clight.clight",
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"/org/clight/clight",
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"org.clight.clight",
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"Capture",
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NULL,
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NULL,
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"bb",
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"0",
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"1");
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/* get clight ambient light value */
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sd_bus_get_property(userbus,
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"org.clight.clight",
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"/org/clight/clight",
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"org.clight.clight",
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"AmbientBr",
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NULL,
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&sdbusmessage,
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"d");
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sd_bus_message_read(sdbusmessage, "d", &brightness);
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sd_bus_message_unref(sdbusmessage);
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sd_bus_unref(userbus);
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return brightness * 100; /* return brightness as int from 0-100 */
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}
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