- addedd NCNN model support to rtsp_ai_player

- added printing of inference FPS
- simple AI test bench which can be used to compare models

misc/rtsp_ai_player/rtsp_ai_player.pro

@@ -1,12 +1,16 @@
 QT += core network serialport
 QT -= gui
-CONFIG += c++11 concurrent console
+CONFIG += concurrent console c++17
 MOC_DIR = moc
 OBJECTS_DIR = obj
 
 SOURCES = $$PWD/*.cpp
 HEADERS = $$PWD/*.h
 
+ai_bench {
+    QMAKE_CXXFLAGS += -DAI_BENCH
+}
+
 gimbal {
     message("Using real gimbal camera.")
     QMAKE_CXXFLAGS += -DGIMBAL
@@ -35,6 +39,17 @@ opi5 {
     SOURCES += $$PWD/src-opi5/*.c $$PWD/src-opi5/*.cpp $$PWD/src-opi5/*.cc
     HEADERS += $$PWD/src-opi5/*.h
 }
+else:ncnn {
+    message("NCNN build")
+    CONFIG += link_pkgconfig
+    PKGCONFIG += opencv4
+    QMAKE_CXXFLAGS += -DNCNN_BUILD -fopenmp
+    QMAKE_LFLAGS += -fopenmp
+    INCLUDEPATH += /opt/ncnn/include
+    LIBS += /opt/ncnn/lib/libncnn.a -lgomp
+    SOURCES += $$PWD/src-ncnn/*.cpp
+    HEADERS += $$PWD/src-ncnn/*.h
+}
 else:opencv {
     message("OpenCV build")
     message("You must use YOLOv8 ONNX files. Azaion model does not work!")