Enables use of multiple TPUs in OPI5

misc/rtsp_ai_player/aiengine.h

@@ -1,6 +1,7 @@
 #pragma once
 
 #include <QObject>
+#include <QElapsedTimer>
 #include <opencv2/core.hpp>
 #include <opencv2/videoio.hpp>
 #include "aienginertsplistener.h"
@@ -21,9 +22,15 @@ public slots:
 
 signals:
     void inferenceFrame(cv::Mat frame);
+    void inferenceFrame2(cv::Mat frame);
+    void inferenceFrame3(cv::Mat frame);
 
 private:
+    QElapsedTimer mElapsedTimer;
+    uint32_t mFrameCounter = 0;
     AiEngineRtspListener *mRtspListener;
     AiEngineInference *mInference;
+    AiEngineInference *mInference2;
+    AiEngineInference *mInference3;
     AiEngineGimbalClient *mGimbalClient;
 };