videoio for mingw32: added STRSAFE_NO_DEPRECATE and realpath

modules/videoio/CMakeLists.txt

@@ -78,6 +78,9 @@ endif()
 if (WIN32 AND HAVE_DSHOW)
   list(APPEND videoio_srcs ${CMAKE_CURRENT_LIST_DIR}/src/cap_dshow.cpp)
   list(APPEND videoio_hdrs ${CMAKE_CURRENT_LIST_DIR}/src/cap_dshow.hpp)
+  if (MINGW64)
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DSTRSAFE_NO_DEPRECATE")
+  endif()
 endif()
 
 if (WIN32 AND HAVE_MSMF)

modules/videoio/src/cap_gstreamer.cpp

@@ -87,6 +87,12 @@
 #endif
 
 #if defined(_WIN32) || defined(_WIN64)
+#if defined(__MINGW32__)
+inline char *realpath(const char *path, char *resolved_path)
+{
+    return _fullpath(resolved_path,path,PATH_MAX);
+}
+#endif
 #define snprintf _snprintf
 #define vsnprintf _vsnprintf
 #define strcasecmp _stricmp