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1.9 KiB
Python

import subprocess
import tempfile
try:
from pyA20.gpio import gpio, port
except ImportError:
from unittest.mock import Mock
gpio = Mock()
class Tmpobj():
pass
port = Tmpobj()
port.PG0 = 42
from bureau import Bureau, add_api
class Photography(Bureau):
"""
The Photography dept. provides document camera and other image
capture services for other bureaus.
"""
name = "Photography Dept."
prefix = "PX"
version = 0
doc_light_pin = port.PG0
def __init__(self):
Bureau.__init__(self)
# set up the gpios for lamp & knobs
gpio.init()
gpio.pullup(self.doc_light_pin, 0) # reset pullup state
gpio.pullup(self.doc_light_pin, gpio.PULLDOWN)
def _doc_light_on(self):
gpio.output(self.doc_light_pin, gpio.HIGH)
def _doc_light_off(self):
gpio.output(self.doc_light_pin, gpio.LOW)
@add_api("photo", "Get Document Photo")
def photo(self):
"""
Takes a photograph using the document camera. Returns
the file name.
"""
self._doc_light_on()
tmpimg = tempfile.NamedTemporaryFile(suffix=".jpg", delete=False)
tmpimg.close()
# TODO: make more reliable
# TODO: make resolution config variable
# this is a dirty hack to keep the webcam system calls from hanging
#cmd1 = "fswebcam --jpeg 95 --no-banner --resolution 320x240 /dev/null"
#cmd2 = "fswebcam --jpeg 95 --no-banner --resolution 1920x1080 "
#cmd2 += "-F 2 -S 1" + tmpimg.name
#cmd1 = "uvccapture -d/dev/video1 -x320 -y240 -o /dev/null"
cmd2 = "uvccapture -d/dev/video1 -D2 -m -x3264 -y2448 -o" + tmpimg.name
#subprocess.check_output(cmd1.split())
subprocess.check_output(cmd2.split())
self._doc_light_off()
return {"photo": tmpimg.name}
def main():
px = Photography()
px.run()
if __name__ == "__main__":
main()