使用Onvif協議控制預置位

預置位在安防領域有較爲普遍的應用，可以進行很多既定位置的跳轉，很方便

之前我們說過如何用Onvif協議進行設備的發現，探測，以及雲臺控制等，今天我們來說一下如何使用Onvif進行預置位的操作

流程

獲取設備能力Capabilities

獲取設備的能力，並且可以獲取到Media和PTZ的URI，使用這兩個URL可以進行流和預置位操作，這裏如果PTZ URI獲取不到意味着這個設備無法支持預置位控制

_tds__GetCapabilities* capabilities = soap_new__tds__GetCapabilities(proxyDevice, -1);
tt__CapabilityCategory* category = new tt__CapabilityCategory;
capabilities->Category = category;
*(capabilities->Category) = tt__CapabilityCategory__All;
_tds__GetCapabilitiesResponse* response = soap_new__tds__GetCapabilitiesResponse(proxyDevice, -1);
if (SOAP_OK == proxyDevice->GetCapabilities(capabilities, response))
{
    if (response->Capabilities)
    {
        //Media URI: response->Capabilities->Media->XAddr;
        //PTZ URI: response->Capabilities->PTZ->XAddr;
    }
}

獲取Media Profile

_trt__GetProfiles* getProfiles = soap_new__trt__GetProfiles(proxyMedia, -1);
_trt__GetProfilesResponse* response = soap_new__trt__GetProfilesResponse(proxyMedia, -1);
if (SOAP_OK == proxyMedia->GetProfiles(getProfiles, response))
{
    int size = response->__sizeProfiles;
    for (int i = 0; i < size; ++i)
    {
        if (response->Profiles[i])
        {
            //Media Profile Token: response->Profiles[i]->token;
            //一般設備包含多個Profile Token，包含主碼流、子碼流、第三碼流
        }
    }
}

預置位控制

bool result = false;

   PTZBindingProxy* ptzProxy = new PTZBindingProxy;
   ptzProxy->soap_endpoint = ptzUrl.c_str();

   if (!security(ptzProxy, username, password))
   {
       delete ptzProxy;
       return result;
   }

   char presetToken[8];
   itoa(index, presetToken, 10);

   if (command == PRESET_GOTO)
   {
       _tptz__GotoPreset* preset = soap_new__tptz__GotoPreset(ptzProxy, -1);
       _tptz__GotoPresetResponse* response = soap_new__tptz__GotoPresetResponse(ptzProxy, -1);
       preset->ProfileToken = const_cast<char*>(profile.c_str());
       preset->PresetToken = presetToken;

       if (SOAP_OK == ptzProxy->GotoPreset(preset, response))
           result = true;

       if (response)
           soap_delete__tptz__GotoPresetResponse(ptzProxy, response);

       if (preset)
           soap_delete__tptz__GotoPreset(ptzProxy, preset);
   }
   else if (command == PRESET_SET)
   {
       _tptz__SetPreset* preset = soap_new__tptz__SetPreset(ptzProxy, -1);
       _tptz__SetPresetResponse* response = soap_new__tptz__SetPresetResponse(ptzProxy, -1);
       preset->ProfileToken = const_cast<char*>(profile.c_str());
       preset->PresetToken = presetToken;

       if (SOAP_OK == ptzProxy->SetPreset(preset, response))
           result = true;

       if (response)
           soap_delete__tptz__SetPresetResponse(ptzProxy, response);

       if (preset)
           soap_delete__tptz__SetPreset(ptzProxy, preset);
   }
   else if (command == PRESET_REMOVE)
   {
       _tptz__RemovePreset* preset = soap_new__tptz__RemovePreset(ptzProxy, -1);
       _tptz__RemovePresetResponse* response = soap_new__tptz__RemovePresetResponse(ptzProxy, -1);
       preset->ProfileToken = const_cast<char*>(profile.c_str());
       preset->PresetToken = presetToken;

       if (SOAP_OK == ptzProxy->RemovePreset(preset, response))
           result = true;

       if (response)
           soap_delete__tptz__RemovePresetResponse(ptzProxy, response);

       if (preset)
           soap_delete__tptz__RemovePreset(ptzProxy, preset);
   }

   delete ptzProxy;

   return result;