IWMSBroadcastPublishingPoint::get_BufferSetting

The get_BufferSetting method retrieves a member of the WMS_BUFFER_SETTING enumeration type that indicates the amount of buffering that is done on a broadcast sink.

HRESULT get_BufferSetting(
  WMS_BUFFER_SETTING*  pVal
);

Arguments

pVal	[out] Member of the WMS_BUFFER_SETTING enumeration type that indicates the amount of buffering that is done on a broadcast sink. This must be one of the following values.

Value	Description
WMS_BUFFER_SETTING_UNSPECIFIED	Reserved for future use.
WMS_BUFFER_SETTING_MINIMIZE_STARTUP_LATENCY	Instructs the server to buffer data ahead of the client connection so that, when the client connects, the server can send data to it more quickly.
WMS_BUFFER_SETTING_PROPOGATION_LATENCY	Minimizes the amount of data that the server buffers before streaming.

Return Value

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

Return code	Number	Description
E_POINTER	0x80004003	pVal is a NULL pointer argument.
NS_E_PUBLISHING_POINT_REMOVED	0xC00D145AL	The publishing point has already been removed.

Remarks

The default value is WMS_BUFFER_SETTING_MINIMIZE_STARTUP_LATENCY.

Example

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

// Declare variables and interfaces.
IWMSServer                    *pServer;
IWMSPublishingPoints          *pPubPoints;
IWMSPublishingPoint           *pPubPoint;
IWMSBroadcastPublishingPoint  *pBCPubPoint;

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 the IWMSPublishingPoints
// interface and retrieve the number of publishing points.
hr = pServer->get_PublishingPoints(&pPubPoints);
if (FAILED(hr)) goto EXIT;
hr = pPubPoints->get_Count(&lCount);
if (FAILED(hr)) goto EXIT;

// Retrieve each publishing point and query the
// IWMSBroadcastPublishingPoint interface.
for (long x = 0; x < lCount; x++)
{
    varIndex = x;
    hr = pPubPoints->get_Item(varIndex, &pPubPoint);
    if (FAILED(hr)) goto EXIT;

    // Retrieve the type of publishing point.
    WMS_PUBLISHING_POINT_TYPE pptType;
    hr = pPubPoint->get_Type(&pptType);
    if (FAILED(hr)) goto EXIT;

    if (pptType == WMS_PUBLISHING_POINT_TYPE_BROADCAST)
    {
        hr = pPubPoint->QueryInterface(IID_IWMSBroadcastPublishingPoint,
                                      (void **)&pBCPubPoint);
        if (FAILED(hr)) goto EXIT;

        // Retrieve the buffer setting for the publishing point.
        WMS_BUFFER_SETTING bsSetting;
        hr = pBCPubPoint->get_BufferSetting(&bsSetting);
        if (FAILED(hr)) goto EXIT;

        pBCPubPoint->Release();
    }

    // Release temporary COM objects.
    pPubPoint->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

Reference

IWMSBroadcastPublishingPoint Interface