CTransformFilter.CheckTransform method
[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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 CheckTransform method checks whether an input media type is compatible with an output media type.
Syntax
virtual HRESULT CheckTransform(
const CMediaType *mtIn,
const CMediaType *mtOut
) = 0;
Parameters
-
mtIn
-
Pointer to a CMediaType object that specifies the input type.
-
mtOut
-
Pointer to a CMediaType object that specifies the output type.
Return value
Returns an HRESULT value. Possible values include those shown in the following table.
| Return code | Description |
|---|---|
|
The media types are compatible. |
|
The media types are not compatible. |
Remarks
The derived class must implement this method. Return S_OK if the filter can accept both of the specified media types, or an error code otherwise.
Requirements
| Requirement | Value |
|---|---|
| Header |
|
| Library |
|