解决python demo停止扫描流程，修改扫描出的图片文件名

test/scannerlib/test.py

@@ -4,6 +4,7 @@ from os import system
 import time
 import platform
 from ctypes import * 
+import random
 
 class HGLibSaveImageParam(Structure):  
     _fields_ = [ ("size", c_uint),  
@@ -78,25 +79,37 @@ HGLib_SetDeviceParam.restype = ctypes.c_int
 DevParam = ctypes.c_int(1) #HGLIB_OPTION_ENUMVALUE_DLSCLX_W -> 不进行多流输出类型
 Ret = HGLib_SetDeviceParam(Device, 1, byref(DevParam)) #见HGLib_SetDeviceParam 头文件接口说明 1 -> HGLIB_OPTION_NAME_DLSC 多流输出
 
-bStop=False
+
 #扫描事件回调
 def HGLibDeviceScanEventFunc(device: c_void_p, event: c_uint, err: c_int, info: c_char_p, param: c_void_p):
-    print(info)
+    s_info=info
+    global bStop
+    print("event code",event,"     event info:",s_info)
     if event == 2:#HGLIB_DEVSCAN_EVENT_END 扫描停止
         bStop=True
+        print("bStop true")	  
     elif event == 1:
         bStop=False
+        print("bStop false")
     return
-
+imgindex=0
 #扫描图像事件回调    
 def HGLibDeviceScanImageFunc(device: c_void_p, image: c_void_p, param: c_void_p):
+    global imgindex
     ImageParam = HGLibSaveImageParam()
     ImageParam.size = 20
     ImageParam.jpegQuality = 100
     ImageParam.tiffCompression = 0
     ImageParam.tiffJpegQuality = 0
     ImageParam.ocr = 0
-    Ret = HGLib_SaveImage(image, c_char_p(b"3.jpg"), pointer(ImageParam))
+    print("image call back!!")
+    imgindex+=1
+    t_index=imgindex
+    imgname=str(t_index) + '_scanned.jpg'
+    print(imgname)
+    b_imagename=imgname.encode('utf-8')
+    pchar=c_char_p(b_imagename)
+    Ret = HGLib_SaveImage(image, pchar, pointer(ImageParam))
     return
 
 #注册扫描相关事件并启动扫描
@@ -111,9 +124,12 @@ print("start scan")
 Ret = HGLib_StartDeviceScan(Device, cb1, 0, cb2, 0)
 
 #模拟扫描持续应等待扫描事件回调返回扫描停止才结束本次扫描流程
-while(bStop != True):
+while(not bStop):
     time.sleep(1)
-    break;
+    print("scanning...")
+
+
+print("scan done!!!")
 
 #关闭当前打开的设备
 HGLib_CloseDevice=Objdll.HGLib_CloseDevice