Update C++ SDK to dbr v9.4

Author: yushulx

examples/camera/camera_async_api.py

@@ -1,47 +1,49 @@
 import barcodeQrSDK
 import numpy as np
-
-# set license
-barcodeQrSDK.initLicense("DLS2eyJoYW5kc2hha2VDb2RlIjoiMjAwMDAxLTE2NDk4Mjk3OTI2MzUiLCJvcmdhbml6YXRpb25JRCI6IjIwMDAwMSIsInNlc3Npb25QYXNzd29yZCI6IndTcGR6Vm05WDJrcEQ5YUoifQ==")
-
-# initialize barcode scanner
-scanner = barcodeQrSDK.createInstance()
+import cv2
 
 g_results = None
 
 def callback(results):
-    global g_results 
+    global g_results
     g_results = results
-    
-import cv2
-scanner.addAsyncListener(callback)
 
-cap = cv2.VideoCapture(0)
-while True:
-    ret, image = cap.read()
-    if image is not None:
-        scanner.decodeMatAsync(image)
-    
-    if g_results != None:
-        for result in g_results:
-            print("barcode format: " + result.format)
-            print("barcode value: " + result.text)
-            x1 = result.x1
-            y1 = result.y1
-            x2 = result.x2
-            y2 = result.y2
-            x3 = result.x3
-            y3 = result.y3
-            x4 = result.x4
-            y4 = result.y4
-            
-            cv2.drawContours(image, [np.int0([(x1, y1), (x2, y2), (x3, y3), (x4, y4)])], 0, (0, 255, 0), 2)
-        
+def run():
+    # set license
+    barcodeQrSDK.initLicense("DLS2eyJoYW5kc2hha2VDb2RlIjoiMjAwMDAxLTE2NDk4Mjk3OTI2MzUiLCJvcmdhbml6YXRpb25JRCI6IjIwMDAwMSIsInNlc3Npb25QYXNzd29yZCI6IndTcGR6Vm05WDJrcEQ5YUoifQ==")
 
-    cv2.imshow('Barcode QR Code Scanner', image)
-    ch = cv2.waitKey(1)
-    if ch == 27:
-        break
+    # initialize barcode scanner
+    scanner = barcodeQrSDK.createInstance()
+    scanner.addAsyncListener(callback)
 
+    cap = cv2.VideoCapture(0)
+    while True:
+        ret, image = cap.read()
+        if image is not None:
+            scanner.decodeMatAsync(image)
+        
+        if g_results != None:
+            for result in g_results:
+                print("barcode format: " + result.format)
+                print("barcode value: " + result.text)
+                x1 = result.x1
+                y1 = result.y1
+                x2 = result.x2
+                y2 = result.y2
+                x3 = result.x3
+                y3 = result.y3
+                x4 = result.x4
+                y4 = result.y4
+                
+                cv2.drawContours(image, [np.int0([(x1, y1), (x2, y2), (x3, y3), (x4, y4)])], 0, (0, 255, 0), 2)
+            
 
+        cv2.imshow('Barcode QR Code Scanner', image)
+        ch = cv2.waitKey(1)
+        if ch == 27:
+            break
+    
+    scanner.clearAsyncListener()
 
+if __name__ == '__main__':
+    run()