// Oprogramowanie Roman Ryltsov
Introducing another popular DirectShow project: Vivek’s source filter which emulates a video capture device. For a long time the code was hosted on P “The March Hare” W’s website, which was eventually taken down. I placed the recovered project, binaries, README and upgrade to Visual Studio 2019 on GitHub: roman380/tmhare.mvps.org-vcam: Original Vivek’s popular sample project…
Interface methods lack pure specifiers. This might be OK for some development but once you try to inherit your handler class from public winrt::implements<AsyncCallback, IRtwqAsyncCallback> you are in trouble! 1>Foo.obj : error LNK2001: unresolved external symbol “public: virtual long __cdecl IRtwqAsyncCallback::GetParameters(unsigned long *,unsigned long *)” (?GetParameters@IRtwqAsyncCallback@@UEAAJPEAK0@Z) 1>Foo.obj : error LNK2001: unresolved external symbol “public: virtual…
Isolated property is supposed to enable referencing in-process COM servers as a registration free COM dependency, but something got broken on the way: Visual Studio 2019 Preview and .NET 5 produce applications that lose the link. It is still preview so hopefully things get resolved timely. The issue on GitHub: Single-File Executable Cannot Use Registration…
Yesterday’s bug is not the only “news”. Some time ago I already saw weird broken behavior of rebuild of DirectShowSpy.dll with current version of Visual Studio and MSVC. Now the problem is getting more clear. Here is some interface: Compiled into type library it looks okay. Windows SDK 10.0.18362 COM/OLE Object Viewer shows the correct…
Ancient piece of code started giving troubles: When MSVC_FIX_VOLATILE is nothing, it appears that optimizing compiler forgets pT and uses just some variation of adjusted this, which makes sense overall because static cast between the two can be resolved at compile time. However, the problem is that the value of this is wrong and there…
The application in previous post Is my system a hybrid (switchable) graphics system? is implemented in C++/WinRT, which I finally decided to give a try. For authoring and consuming Windows Runtime APIs using C++, there is C++/WinRT. This is Microsoft’s recommended replacement for the C++/CX language projection, and the Windows Runtime C++ Template Library (WRL). The real question…
LLVM Coding Standards – Source Code Width: Write your code to fit within 80 columns of text. This helps those of us who like to print out code and look at your code in an xterm without resizing it. The longer answer is that there must be some limit to the width of the code…