// Oprogramowanie Roman Ryltsov
Source code availability
A basic task in thread synchronization is putting something on one thread and getting it out on another thread for further processing. Two or more threads of execution are accessing certain data, and in order to keep data consistent and solid the access is split into atomic operations which are only allowed for one thread…
One of the popular questions asked in relation to DirectShow filters, and also a popular task is to modify video stream while in playback. There are various reasons one might need to do it, including keying video to replace color/range, or apply text or time code on top of video, including while re-compressing footage, adjust…
Windows Vista added new synchronization API, Slim Reader/Writer (SRW) Locks, which is a powerful alternative to critical sections. The detailed description is, as always on MSDN, and what makes it really cool is simple: unlike critical sections, SRW Locks provide reader and writer access synchronization making it possible for 2 and more reader to not…
Because Microsoft C++ Runtime library is distributed as a side-by-side assembly, GetModuleHandle and LoadLibrary is no longer available to locate the library within the process. Both API calls would return NULL handle. HMODULE hModule = GetModuleHandle(_T(“msvcr90.dll”)); HMODULE hModule = LoadLibrary(_T(“msvcr90.dll”)); Still, how to locate the modules in order to, for example, be able to check…
I added two new simple samples for the MediaTools DirectShow filters to demonstrate how to capture M-JPEG video feed, esp. from an IP camera, and write the video frames into sequence of JPEG files. The other sample takes a directory on the input and plays the images back as video. If you are working on…
DirectShow Filter Graph Spy was updated to add new functionality: spying over another DirectShow object – Filter Mapper. Filter Mapper object is used for filter registration purposes and also internally by DirectShow’s Intelligent Connect. IFilterMapper2 interface traces provide detailed description on steps DirectShow takes in order to connect and/or render filter pins. For example when…
The question is being asked from time to time. Everyone knows what is full screen video. Video renderers implement full screen capability since long ago through their IVideoWindow::put_FullScreenMode property, and even Filter Graph Manager exposes its own IVideoWindow interface to forward calls to filter’s implementation of IVideoWindow interface. However, for Video Mixing Renderers, version 7…