WinRT/UWP build: fix more warnings in media part

cmake/templates/dllmain.cpp.in

@@ -9,6 +9,8 @@
 #error "Build configuration error"
 #endif
 
+#pragma warning(disable:4447) // Disable warning 'main' signature found without threading model
+
 #define WIN32_LEAN_AND_MEAN
 #include <windows.h>
 

modules/videoio/src/cap_winrt/MediaStreamSink.cpp

@@ -35,7 +35,7 @@ MediaStreamSink::MediaStreamSink(
     __in MediaSampleHandler^ sampleHandler
     )
     : _shutdown(false)
-    , _id(-1)
+    , _id((DWORD)-1)
     , _width(0)
     , _height(0)
 {
@@ -207,16 +207,16 @@ HRESULT MediaStreamSink::QueueEvent(
     __in MediaEventType met,
     __in REFGUID extendedType,
     __in HRESULT status,
-    __in_opt const PROPVARIANT *value
+    __in_opt const PROPVARIANT *value_
     )
 {
-    return ExceptionBoundary([this, met, extendedType, status, value]()
+    return ExceptionBoundary([this, met, extendedType, status, value_]()
     {
         auto lock = _lock.LockExclusive();
 
         _VerifyNotShutdown();
 
-        CHK(_eventQueue->QueueEventParamVar(met, extendedType, status, value));
+        CHK(_eventQueue->QueueEventParamVar(met, extendedType, status, value_));
     });
 }
 

modules/videoio/src/cap_winrt_bridge.cpp

@@ -81,11 +81,11 @@ void VideoioBridge::allocateOutputBuffers()
 }
 
 // performed on UI thread
-void VideoioBridge::allocateBuffers(int width, int height)
+void VideoioBridge::allocateBuffers(int width_, int height_)
 {
     // allocate input Mats (bgra8 = CV_8UC4, RGB24 = CV_8UC3)
-    frontInputMat.create(height, width, CV_8UC3);
-    backInputMat.create(height, width, CV_8UC3);
+    frontInputMat.create(height_, width_, CV_8UC3);
+    backInputMat.create(height_, width_, CV_8UC3);
 
     frontInputPtr = frontInputMat.ptr(0);
     backInputPtr = backInputMat.ptr(0);

modules/videoio/src/cap_winrt_capture.cpp

@@ -154,6 +154,7 @@ namespace cv {
     // see VideoCapture::read
     bool VideoCapture_WinRT::retrieveFrame(int channel, cv::OutputArray outArray)
     {
+        CV_UNUSED(channel);
         if (!started) {
 
             int width, height;

modules/videoio/src/cap_winrt_video.cpp

@@ -238,9 +238,9 @@ void Video::CopyOutput() {
         auto inAr = VideoioBridge::getInstance().frontInputPtr;
         auto outAr = GetData(VideoioBridge::getInstance().frontOutputBuffer->PixelBuffer);
 
-        const unsigned int bytesPerPixel = 3;
+        const unsigned int bytesPerPixel_ = 3;
         auto pbScanline = inAr;
-        auto plPitch = width * bytesPerPixel;
+        auto plPitch = width * bytesPerPixel_;
 
         auto buf = outAr;
         unsigned int colBytes = width * 4;
@@ -254,7 +254,7 @@ void Video::CopyOutput() {
 
             // used for RGB24:
             // nb. alpha is set to full opaque
-            for (unsigned int i = 0, j = 0; i < plPitch; i += bytesPerPixel, j += 4)
+            for (unsigned int i = 0, j = 0; i < plPitch; i += bytesPerPixel_, j += 4)
             {
                 // swizzle the R and B values (RGB24 to Bgr8)
                 buf[j] = pbScanline[i + 2];