IWMMediaProps::GetMediaType method

The GetMediaType method retrieves a structure describing the media type.

Syntax

HRESULT GetMediaType(
  WM_MEDIA_TYPE *pType,
  DWORD         *pcbType
);

Parameters

pType

Pointer to a WM_MEDIA_TYPE structure. If this parameter is set to NULL, this method returns the size of the buffer required in the pcbType parameter.

pcbType

On input, the size of the pType buffer. On output, if pType is set to NULL, the value this points to is set to the size of the buffer needed to hold the media type structure.

Return value

The method returns an HRESULT. Possible values include, but are not limited to, those in the following table.

Return code Description
S_OK
The method succeeded.
E_INVALIDARG
The pcbType parameter is NULL.
ASF_E_BUFFERTOOSMALL
The pcbType parameter is not large enough.

Remarks

You must make two calls to GetMediaType. On the first call, pass NULL as pType. On return, the value of pcbType will be set to the buffer size required to hold the WM_MEDIA_TYPE structure. Then you can allocate a buffer of the required size and pass a pointer to it as pType on the second call.

Requirements

   
Minimum supported client Windows 2000 Professional [desktop apps only],Windows Media Format 7 SDK, or later versions of the SDK
Minimum supported server Windows 2000 Server [desktop apps only]
Target Platform Windows
Header wmsdkidl.h (include Wmsdk.h)
Library Wmvcore.lib; WMStubDRM.lib (if you use DRM)

See also

IWMMediaProps Interface

IWMMediaProps::SetMediaType

Media Types