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IWMSPlaylist::get_CurrentMediaInformation

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IWMSPlaylist::get_CurrentMediaInformation

The get_CurrentMediaInformation method retrieves an IWMSActiveMedia interface that contains information about the active media element in the playlist.

Syntax

  HRESULT get_CurrentMediaInformation(
  IWMSActiveMedia**  ppMediaInfo
);

Parameters

ppMediaInfo

[out] Pointer to a pointer to an IWMSActiveMedia interface. This method calls AddRef internally. To avoid memory leaks, you must call Release when you are finished using the interface.

Return Values

If the method succeeds, it returns S_OK. If it fails, it returns an HRESULT error code.

Return code Number Meaning
E_INVALIDARG 0x80070057 ppMediaInfo is a NULL pointer argument.

Remarks

For more information, see the IWMSActiveMedia interface.

Example Code

#include <windows.h>
#include <atlbase.h>    // Includes CComVariant.
#include "wmsserver.h"

// Declare variables and interfaces.
IWMSServer      *pServer;
IWMSPlayers     *pPlayers;
IWMSPlayer      *pPlayer;
IWMSPlaylist    *pPlaylist;
IWMSActiveMedia *pActiveMedia;

HRESULT         hr;
CComVariant     varIndex;
long            lCount;

// Initialize the COM library and retrieve a pointer
// to an IWMSServer interface.
hr = CoInitialize(NULL);
hr = CoCreateInstance(CLSID_WMSServer,
                      NULL,
                      CLSCTX_ALL,
                      IID_IWMSServer,
                      (void **)&pServer);
if (FAILED(hr)) goto EXIT;

// Retrieve a pointer to an IWMSPlayers interface
// and retrieve the total count of current connections.
hr = pServer->get_Players(&pPlayers);
if (FAILED(hr)) goto EXIT;
hr = pPlayers->get_Count(&lCount);
if (FAILED(hr)) goto EXIT;

// Retrieve information about each requested playlist.
for (long x = 0; x < lCount; x++)
{
    varIndex = x;
    hr = pPlayers->get_Item(varIndex, &pPlayer);
    if (FAILED(hr)) goto EXIT;

    // Retrieve the playlist that is requested 
    // by the client if one exists.
    hr = pPlayer->get_RequestedPlaylist(&pPlaylist);
    if (FAILED(hr)) goto EXIT;

    // Retrieve a pointer to the active media element.
    hr = pPlaylist->get_CurrentMediaInformation(&pActiveMedia);
    if (FAILED(hr)) goto EXIT;

    // Release temporary COM objects.
    pPlayer->Release();
    pPlaylist->Release();
    pActiveMedia->Release();
}

EXIT:
    // TODO: Release temporary COM objects and uninitialize COM.

Requirements

Header: wmsserver.h

Library: WMSServerTypeLib.dll

Platform: Windows Server 2003 family, Windows Server 2008 family.

See Also

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