Declaring the Derived Class

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Windows Embedded CE 6.0 R3

4/8/2010

The IMediaObjectImpl template is declared in the header with the following syntax.

template <class _DERIVED_, 
int NUMBEROFINPUTS, 
int NUMBEROFOUTPUTS>
class IMediaObjectImpl : public IMediaObject

Parameters

• *_*DERIVED_
  Derived class type.

• NUMBEROFINPUTS
  Number of input streams.

• NUMBEROFOUTPUTS
  Number of output streams.

Return Values

None.

Remarks

For example, to create a derived class named CMyDmoClass that supports one input stream and one output stream, you would declare it as follows.

class CMyDmoClass :
    public IMediaObjectImpl<CMyDmoClass, 1, 1>  // 1 input, 1 output

DMOs cannot dynamically create or destroy streams, so the stream numbers are constant.

Requirements

See Also

Reference

DMO Reference
DMO Base Class Reference
IMediaObjectImpl Class Template