Added check if video device is available

2012-08-03 16:05:47 +02:00
parent 380242f0e5
commit 2791ecc167
1 changed files with 8 additions and 0 deletions
--- a/lib/qrscanner.py
+++ b/lib/qrscanner.py
@@ -11,6 +11,14 @@ from urlparse import urlparse, parse_qs
 def is_available():
    if not zbar:
        return False
+
+    try:
+        proc = zbar.Processor()
+        proc.init()
+    except zbar.SystemError:
+        # Cannot open video device
+        return False
+
    return True

 def scan_qr():