CBaseObject class
[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]
The CBaseObject class is an abstract class for implementing DirectShow objects. To implement Component Object Model (COM) objects, use the CUnknown class, which derives from CBaseObject.
| Class Methods | Description |
|---|---|
| CBaseObject | Constructor method. |
| ~CBaseObject | Destructor method. |
| ObjectsActive | Retrieves the count of active objects. |
Remarks
Most of the DirectShow base classes derive from CBaseObject. This class provides debugging assistance by keeping a count of all the DirectShow objects active during run time. The object count is stored in a class-static member variable:
class CBaseObject
{
private:
static LONG m_cObjects; // Total number of objects active.
/* ... */
};
In debug builds, the DLL will assert if it is unloaded while the object count is greater than zero. This makes it easier to track down leaks caused by reference-counting problems.
The CBaseObject constructor takes one argument, a debugging name for the object. This name is stored in a global table in the DLL. The DbgDumpObjectRegister function formats a list of the objects active in the DLL, and sends it to the debug output.
Requirements
| Requirement | Value |
|---|---|
| Header |
|
| Library |
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