IMediaSeeking::GetAvailable method (strmif.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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 GetAvailable method retrieves the range of times in which seeking is efficient.
Syntax
HRESULT GetAvailable(
[out] LONGLONG *pEarliest,
[out] LONGLONG *pLatest
);
Parameters
[out] pEarliest
Pointer to a variable that receives the earliest time for efficient seeking.
[out] pLatest
Pointer to a variable that receives the latest time for efficient seeking.
Return value
Returns an HRESULT value. Possible values include the following.
| Return code | Description |
|---|---|
|
Success. |
|
Method is not supported. |
|
NULL pointer argument. |
Remarks
This method is intended primarily for seeking in media streams that might have excessive latency, such as streams being sent over a network. The returned values indicate cached data that has already arrived, which can be easily seeked. It is assumed that seeking to values beyond these returned parameters will cause a delay while the application waits for the data to arrive.
All time values are expressed in the current time format. The default time format is REFERENCE_TIME units (100 nanoseconds). To change time formats, use the IMediaSeeking::SetTimeFormat method.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 2000 Professional [desktop apps only] |
| Minimum supported server | Windows 2000 Server [desktop apps only] |
| Target Platform | Windows |
| Header | strmif.h (include Dshow.h) |
| Library | Strmiids.lib |