IWMReaderNetworkConfig::GetUDPPortRanges method (wmsdkidl.h)

Статья
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 It has been superseded by Source Reader and Sink Writer.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 GetUDPPortRanges method retrieves the UDP port number ranges used for receiving data.

Syntax

HRESULT GetUDPPortRanges(
  [out]     WM_PORT_NUMBER_RANGE *pRangeArray,
  [in, out] DWORD                *pcRanges
);

Parameters

[out] pRangeArray

Pointer to an array of WM_PORT_NUMBER_RANGE structures allocated by the caller. Pass NULL to get the size of the array.

[in, out] pcRanges

On input, pointer to a DWORD containing the length of the array passed in pRangeArray. On output, pointer to the required array size.

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.
ASF_E_BUFFERTOOSMALL	The buffer is too small.
E_INVALIDARG	The pcRanges parameter is NULL.

Remarks

You should make two calls to this method. On the first call, pass NULL for pRangeArray. On return, the value pointed to by pcRanges is set to the size of the array that you should allocate. Then you can allocate the required amount of memory for the array and pass a pointer to it as pRangeArray on the second call.

Requirements

Requirement	Value
Minimum supported client	Windows 2000 Professional [desktop apps only],Windows Media Format 7 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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