解决国产系统单面或对折与多流同时开启时，双张校验图像不弹窗的问题；

modules/sane_user/HGSaneImpl.cpp

@@ -1024,6 +1024,10 @@ void HGAPI HGSaneDeviceImpl::ThreadFunc(HGThread thread, HGPointer param)
     HGInt spliteImgCount = 0;
     p->GetSpliteImgCount(&spliteImgCount);
 
+    // 获取当前是否开启对折或者单面模式
+    HGBool isFold = false;
+    p->GetIsFold(&isFold);
+
     HGInt multioutSpliteImgCount = 0;
 
     SANE_Status stat = saneAPI.sane_start_api(p->m_devHandle);
@@ -1184,10 +1188,21 @@ void HGAPI HGSaneDeviceImpl::ThreadFunc(HGThread thread, HGPointer param)
         buffer = NULL;
         bufferSize = 0;
 
-        // 多流输出比图像拆分优先级高，如果多流输出和图像拆分同时开启，应出图数量等于多流输出图像数量的两倍
+        if (!isFold)
-        if (multioutSpliteImgCount == (multioutImgCount == 0 ?  multioutImgCount + spliteImgCount : multioutImgCount * 2))
         {
-            multioutSpliteImgCount = 0;
+            // 多流输出比图像拆分优先级高，如果多流输出和图像拆分同时开启，应出图数量等于多流输出图像数量的两倍
+            if (multioutSpliteImgCount == (multioutImgCount == 0 ? multioutImgCount + spliteImgCount : multioutImgCount * 2))
+            {
+                multioutSpliteImgCount = 0;
+            }
+        }
+        else
+        {
+            // 如果对折模式或单面和多流输出同时开启，多流输出图像数量减半
+            if (multioutSpliteImgCount == (multioutImgCount == 0 ? multioutImgCount + spliteImgCount : multioutImgCount / 2))
+            {
+                multioutSpliteImgCount = 0;
+            }
         }
 
         if (HGSANE_ERR_IMAGE_DISCARD == doubleImgRet)
@@ -1531,3 +1546,32 @@ HGResult HGSaneDeviceImpl::GetSpliteImgCount(HGInt *count)
 
     return HGBASE_ERR_FAIL;
 }
+
+HGResult HGSaneDeviceImpl::GetIsFold(HGBool *isFold)
+{
+    SANE_Int dev_options = 0;
+    SANE_Int  method = 0;
+    HGBool fold = false;
+
+    m_sourceImpl->m_saneApi.sane_control_option_api(m_devHandle, 0, SANE_ACTION_GET_VALUE, &dev_options, nullptr);
+    for (int i = 1; i < dev_options; ++i)
+    {
+        const SANE_Option_Descriptor* opt =  m_sourceImpl->m_saneApi.sane_get_option_descriptor_api(m_devHandle, i);
+        if (strcmp(opt->name, SANE_STD_OPT_NAME_PAGE) == 0)
+        {
+            char *value = (char*)malloc(opt->size * 2 + 4);
+            SANE_Status ret = m_sourceImpl->m_saneApi.sane_control_option_api(m_devHandle, i, SANE_ACTION_GET_VALUE, value, &method);
+            if (ret == SANE_STATUS_GOOD)
+            {
+                if (0 == strcmp(value, OPTION_VALUE_SMYM_DZ) || 0 == strcmp(value, OPTION_VALUE_SMYM_DM))
+                    fold = true;
+
+                *isFold = fold;
+                free(value);
+                return HGBASE_ERR_OK;
+            }
+        }
+    }
+
+    return HGBASE_ERR_FAIL;
+}

modules/sane_user/HGSaneImpl.hpp

@@ -107,6 +107,7 @@ private:
     HGResult GetDoubleImgStatus(HGUInt *status);
     HGResult GetMultioutImgCount(HGInt *count);
     HGResult GetSpliteImgCount(HGInt *count);
+    HGResult GetIsFold(HGBool *isFold);
 
 private:
     HGSaneSourceImpl* m_sourceImpl;