facewaiter waits for enter

facelock.py

 #!/usr/bin/env python
 
+# Lock with mlock, unlock when face is detected
+
 import subprocess
 import threading
 
 locker = subprocess.Popen([ "mlock" ])
 print("locker "+str(locker.pid)+" spawned")
-matcher = subprocess.Popen([ "sh", "-c", "./facematcher.py match -d 2 faces/$USER/*" ])
+matcher = subprocess.Popen([ "./facewaiter.sh" ])
 print("matcher "+str(matcher.pid)+" spawned")
 
 def waitfor(x, others):

facematcher.py

 #!/usr/bin/env python3
+
+# Match camera against existing faces, or record a new face.
+
 import cv2
 import numpy as np
 import face_recognition
         if cv2.mean(frame)[0] < 30:
             continue
 
-        scale = 0.5
+        scale = 1
         rgb_frame = cv2.cvtColor(frame, cv2.COLOR_GRAY2RGB)
         small_rgb_frame = cv2.resize(rgb_frame, (0, 0), fx=scale, fy=scale)
 
 sub_match.add_argument(
     "-s", "--show", default=False, action="store_true",
     help="show what the camera sees")
+sub_match.add_argument(
+    "-w", "--wait", default=False, action="store_true",
+    help="wait for newline on stdin")
 sub_match.add_argument(
     "faces", type=str, nargs="+",
     help="the source image file(s)")
 args = parser.parse_args()
 
 if args.command == "match":
+    if args.wait:
+        input("Waiting for newline...")
     match(args.faces, cv2.VideoCapture(args.device), args.show)
 elif args.command == "record":
     record(args.face, cv2.VideoCapture(args.device))

facewaiter.sh

+#!/bin/sh
+
+keyboard="AT Translated Set 2 keyboard"
+
+rm -f .testfifo
+mkfifo .testfifo
+xinput test "AT Translated Set 2 keyboard" \
+	| grep --line-buffered "key press   36" > .testfifo &
+xpid=$!
+
+rm -f .matchfifo
+mkfifo .matchfifo
+cat .matchfifo | ./facematcher.py match --device 2 --wait faces/$USER/* &
+
+read <.testfifo
+echo > .matchfifo
+
+kill $xpid
+wait
+
+rm -f .testfifo
+rm -f .matchfifo