// Oprogramowanie Roman Ryltsov
A small update to the DirectShow Spy today: DirectShow Filter Graph Spy prints memory allocator properties as a part of graph topology trace on transition to running state. Why is that and what it is for? Filters normally agree on allocator properties (ALLOCATOR_PROPERTIES, obtained from IMemAllocator, obtained from IMemInputPin) themselves without interference from controlling application.…
If you were adding and removing ActiveX controls programmatically with ATL, you might have noticed a nasty memory leak after final release of the control. Control added, removed and a leaky block is left om heap. Tracking simple memory leaks is not a rocket science with Microsoft C++ runtime, by adding _CRTDBG_MAP_ALLOC define, as described…
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…
Unfortunately, the hosting provider EMC Web Hosting decided to stop service without prior notice and the website was removed without a chance to take a backup and files. Google Cache shows that there was an announcement on the website, if they could at least send an email prior to going offline it would be great.…
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…
It is the first time ever – because probably I am not as experienced as Geraint – I witness availability of IMediaSample interface without availability of IMediaSample2. One might be curious what kind of software could provide such a weirdo in 2010? It is latest and greatest Adobe Flash Media Live Encoder 3.1. Additionally to…
Before attributed ATL was deprecated, it was a convenient way to access databases using attributed classes on top of OLEDB Consumer Templates. Does not it look nice? [ db_command(“SELECT ServerData FROM Server WHERE Server = ?”) ] class CGetServerData { public: [ db_param(1) ] LONG m_nServer; [ db_column(1, length = “m_nDataLength”) ] ISequentialStream* m_pDataStream; DBLENGTH…