IWMReaderNetworkConfig2::SetEnableFastCache method (wmsdkidl.h)

아티클
4/26/2023

[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 It has been superseded by Source Reader and Sink Writer.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 SetEnableFastCache method enables or disables Fast Cache streaming. Fast Cache streaming enables network content to be streamed faster than the playback rate, if bandwidth allows.

Syntax

HRESULT SetEnableFastCache(
  [in] BOOL fEnableFastCache
);

Parameters

[in] fEnableFastCache

Specifies whether to enable or disable Fast Cache streaming. The value True enables Fast Cache, and the value False disables it.

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.

Remarks

This method enables the reader to use Fast Cache streaming if the server also supports it. This feature is supported only when streaming content from a server running Windows Media Services. For more information, see Enabling Fast Cache Streaming from the Client.

Regardless of the status of Fast Cache set by this method, a user can enable this feature by adding "?WMCache=1" to the end of the URL. However, Fast Cache cannot be activated at all unless caching is enabled with a call to IWMReaderNetworkconfig2::SetEnableContentCaching.

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)

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