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mmalctl.py
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mmalctl.py
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# Copyright (c) 2013 Calin Crisan
# This file is part of motionEye.
#
# motionEye is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
from logging import debug
from subprocess import CalledProcessError
from motioneye import utils
def list_devices():
# currently MMAL support is designed specifically for the RPi;
# therefore we can rely on the vcgencmd to report MMAL cameras
debug('detecting MMAL camera')
try:
binary = utils.call_subprocess(['which', 'vcgencmd'])
except CalledProcessError: # not found
debug('unable to detect MMAL camera: vcgencmd has not been found')
return []
try:
support = utils.call_subprocess([binary, 'get_camera'])
except CalledProcessError: # not found
debug('unable to detect MMAL camera: "vcgencmd get_camera" failed')
return []
if support.startswith('supported=1 detected=1'):
debug('MMAL camera detected')
return [('vc.ril.camera', 'VideoCore Camera')]
return []