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159 lines
4.8 KiB
Python

import os
import subprocess
import shutil
import signal
import tempfile
import time
from PIL import Image
try:
from pyA20.gpio import gpio, port
except ImportError:
from unittest.mock import Mock
gpio = Mock()
class Tmpobj():
pass
port = Tmpobj()
port.PB3 = 42
port.PB4 = 42
port.PB5 = 42
port.PB6 = 42
port.PB7 = 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
landscape_pin = port.PB3
a5_pin = port.PB5
a4_pin = port.PB4
a6_pin = port.PB6
doc_light_pin = port.PB7
def __init__(self):
Bureau.__init__(self)
# set up the gpios for lamp & knobs
gpio.init()
gpio.setcfg(self.doc_light_pin, gpio.OUTPUT)
gpio.output(self.doc_light_pin, gpio.LOW)
# set pins and pullups for switches
gpio.setcfg(self.landscape_pin, gpio.INPUT)
gpio.pullup(self.landscape_pin, gpio.PULLUP)
gpio.setcfg(self.a4_pin, gpio.INPUT)
gpio.pullup(self.a4_pin, gpio.PULLUP)
gpio.setcfg(self.a5_pin, gpio.INPUT)
gpio.pullup(self.a5_pin, gpio.PULLUP)
gpio.setcfg(self.a6_pin, gpio.INPUT)
gpio.pullup(self.a6_pin, gpio.PULLUP)
# make sure tmp dir exists
tmpdir = "/tmp/webcam"
if not os.path.exists(tmpdir):
os.mkdir(tmpdir)
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 = "/usr/local/bin/uvccapture -m -x3264 -y2448 -o" + tmpimg.name
#subprocess.check_output(cmd1.split())
modpath = os.path.dirname(__file__)
mjpg = os.path.join(modpath, "..", "..", "lib", "mjpg-streamer",
"mjpg-streamer-experimental", "run.sh")
mjpg_dir = os.path.dirname(mjpg)
cmd = mjpg.split() + ["-i", "input_uvc.so -r 3264x2448 -n", "-o", "output_file.so -f /tmp/webcam -d 500 -s 2"]
print(cmd)
#proc = subprocess.Popen(cmd, shell=True, env={"LD_LIBRARY_PATH": mjpg_dir})
proc = subprocess.Popen(cmd)
time.sleep(2)
killer_cmd = "killall -s SIGINT mjpg_streamer"
subprocess.Popen(killer_cmd.split())
time.sleep(2)
# copy last image to the tmpfile
filelist = os.listdir("/tmp/webcam")
for i, f in enumerate(filelist):
filelist[i] = os.path.join("/tmp/webcam", f)
newest = max(filelist, key=lambda x: os.stat(x).st_mtime)
print("copying ", newest, "to", tmpimg.name)
shutil.copyfile(newest, tmpimg.name)
# crop
img = Image.open(tmpimg.name)
img = img.transpose(Image.ROTATE_180)
xsize, ysize = img.size
#crop here to trim calibrated extra pixels
loffset = int(round(xsize * (float(23) / 257)))
roffset = xsize - int(round(xsize * (float(8) / 257)))
box = (loffset, 0, roffset, ysize)
img = img.crop(box)
xsize, ysize = img.size
if gpio.input(self.a4_pin) == 0:
print("scanning as A4")
offset = (xsize - ysize) / 2
box = (offset, 0, (offset + ysize), xsize / 2)
img = img.crop(box)
elif gpio.input(self.a5_pin) == 0:
print("scanning as A5")
offset = xsize / 4
box = (offset, 0, (offset + (xsize / 2)), ysize / 2)
img = img.crop(box)
elif gpio.input(self.a6_pin) == 0:
print("scanning as A6")
offset = (xsize - (ysize / 2)) / 2
box = (offset, 0, (offset + (ysize / 2)), xsize / 4)
img = img.crop(box)
else:
print("scanning as A3")
# rotate
if gpio.input(self.landscape_pin) == 0:
img = img.transpose(Image.ROTATE_90)
img.save(tmpimg.name)
img.close()
self._doc_light_off()
return {"photo": tmpimg.name}
def main():
px = Photography()
px.run()
if __name__ == "__main__":
main()