// Oprogramowanie Roman Ryltsov
This post is starting a step by step tutorial on writing a simple DirectShow filter using a simplified DirectX Media Objects (DMO) API. From the very scratch, the goal is to make a DirectShow/DMO video processing filter which implements video brightness and contrast correction. DirectX Media Objects are COM-based components. To implement a COM object…
Surprisingly fast I got new problems having ffdshow installed as a part of K-Lite Codec Pack. No wonder though because let us take a look at registration information: Display Name: @device:sw:{083863F1-70DE-11D0-BD40-00A0C911CE86}\{0F40E1E5-4F79-4988-B1A9-CC98794E6B55} CLSID: {0F40E1E5-4F79-4988-B1A9-CC98794E6B55} Friendly Name: ffdshow Audio Decoder Path: C:\Program Files\K-Lite Codec Pack\ffdshow\ffdshow.ax Merit: 0x3fffffff Nice merit, ain’t it? What is merit anyway? Let us…
It appears that ATL does not center window correctly on multi-monitor systems. ATL code checks screen work area coordinates in CWindow::CenterWindow to ensure new position is within visible area, however since SystemParametersInfo/SPI_GETWORKAREA is used target rectangle is always on a primary monitor. This hotfix works the problem around:
I am compiling C++ project which is using IJG JPEG library using Visual Studio .NET 2005 (yes, 2008 is yet to come) and it came as a surprise that I stumbled upon struct data alignment issue. I am pretty sure this was not a problem with Visual Studio .NET 2003. The project includes my C++…
In continuation of Nero API… Windows IMAPI is much more convenient to use, it is built on COM, it is “more Windows” etc, however there was an issue even there. Normally IEnumXXX::Next enumerator method accepts third parameter NULL since if we are getting items one by one, we are fine processing return code S_OK/S_FALSE and…
Did you know that when you handle LVN_GETINFOTIP notification message and you are provided with NMLVGETINFOTIP structure, you cannot just supply your own pszText string for the tooltip text? Instead you have to copy your string into supplied buffer, such as using _tcsncpy function. Otherwise things would not work. BEGIN_MSG_MAP_EX(CFooPropertyPage) CHAIN_MSG_MAP(CPropertyPageT) … MSG_LVN_GETINFOTIP(IDC_FOOLISTVIEW, OnFooListViewGetInfoTip) REFLECT_NOTIFICATIONS()…
We have a very interesting hardware vendor from Taiwan, which keeps on surprising. In past our software supported their PCI boards. They were quite popular for their price. Yes they were cheap and were based on a very popular video/audio capture chip which was probably too difficult to screw but they made their attempts. While…