IMediaParams::GetParam method (medparam.h)
[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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 GetParam method retrieves the current value of the specified parameter. If the parameter is currently within an envelope segment, the returned value is the value on the most recently processed sample.
Syntax
HRESULT GetParam(
[in] DWORD dwParamIndex,
[out] MP_DATA *pValue
);
Parameters
[in] dwParamIndex
Zero-based index of the parameter.
[out] pValue
Pointer to a variable of type MP_DATA that receives the parameter value.
Return value
Returns an HRESULT value. Possible values include the following.
| Return code | Description |
|---|---|
|
Index out of range. |
|
NULL pointer argument. |
|
Success. |
Remarks
To enumerate the parameters supported by this object, along with their index values, use the IMediaParamInfo interface.
Requirements
| Requirement | Value |
|---|---|
| Target Platform | Windows |
| Header | medparam.h |
| Library | Dmoguids.lib |