IWMReaderAdvanced4::GetMaxSpeedFactor method (wmsdkidl.h)
[The feature associated with this page, Windows Media Format 11 SDK, is a legacy feature. It has been superseded by Source Reader and Sink Writer. Source Reader and Sink Writer have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use Source Reader and Sink Writer instead of Windows Media Format 11 SDK, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]
The GetMaxSpeedFactor method retrieves the maximum playback rate that can be delivered by the source. For network content, this value reflects the available bandwidth relative to the maximum bit rate of the content.
Syntax
HRESULT GetMaxSpeedFactor(
[out] double *pdblFactor
);
Parameters
[out] pdblFactor
Pointer to a variable that receives the maximum playback rate.
Return value
The method returns an HRESULT. Possible values include, but are not limited to, those in the following table.
| Return code | Description |
|---|---|
|
The method succeeded. |
|
NULL pointer argument. |
Remarks
If the server is using Fast Cache streaming, this method returns 1.0. For local files, including cached content, the method returns DBL_MAX. If no file is open, the method returns 0.0.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 2000 Professional [desktop apps only],Windows Media Format 9 Series 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) |