IWMWriterNetworkSink::GetHostURL 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 It has been superseded by Source Reader and Sink Writer.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 GetHostURL method retrieves the URL from which the stream is broadcast. Clients will access the stream from this URL.

Syntax

HRESULT GetHostURL(
  [out]     WCHAR *pwszURL,
  [in, out] DWORD *pcchURL
);

Parameters

[out] pwszURL

Pointer to buffer that receives a string containing the URL. To retrieve the length of the string, set this parameter to NULL.

[in, out] pcchURL

On input, pointer to the size of pwszURL, in characters. On output, this parameter receives the length of the URL in characters, including the terminating null character.

Return value

The method returns an HRESULT. Possible values include, but are not limited to, the values shown in the following table.

Return code	Description
S_OK	The method succeeded.
ASF_E_BUFFERTOOSMALL	The buffer is too small.
E_INVALIDARG	Invalid argument; pcchURL cannot be NULL.
NS_E_INVALID_REQUEST	The network sink is not connected.

Remarks

You should make two calls to GetHostURL. On the first call, pass NULL as pwszURL. On return, the value pointed to by pcchURL is set to the number of characters, including the terminating null character, required to hold the URL. Then you can allocate the required amount of memory for the string and pass a pointer to it as pwszURL 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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