how can i add a Default Directsound Device to my filter graph

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hi guys:
i'm a little puzzle about "Default Directsound Device".< graphedit / Audio Rederers/ Default Directsound Device>
how can i add a Default Directsound Device to my filter graph so that my player can work correctly.
Anyone got any ideas or links for adding the Default DirectSound Device to filter graph just help me!

Posted 4-Apr-12 4:02am

lanhxg

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3 solutions

Solution 2

C

HRESULT CPlayer::AddDefaultDirectSoundDevice (	IFilterGraph *pfG,IBaseFilter ** ppF,
											  LPCWSTR wszName)
{
	HRESULT hr ;
	ICreateDevEnum *pSysDevEnum = NULL;
	hr = CoCreateInstance(CLSID_SystemDeviceEnum,NULL,CLSCTX_INPROC_SERVER,
		IID_ICreateDevEnum,(void**)&pSysDevEnum);

	if(FAILED(hr))
	{
		return hr; 
	}
	IEnumMoniker *pEnumCat = NULL;
	hr = pSysDevEnum->CreateClassEnumerator(CLSID_AudioRendererCategory, &pEnumCat, 0);

	if(hr ==S_OK)
	{
		IMoniker *pMoniker = NULL;
		ULONG cFetched;
		CString temp ;

		while(pEnumCat->Next(1, &pMoniker, &cFetched) == S_OK)
		{
			IPropertyBag *pPropBag;
			hr = pMoniker->BindToStorage(0, 0, IID_IPropertyBag, 
				(void **)&pPropBag);
			if (SUCCEEDED(hr))
			{
				// To retrieve the filter's friendly name, do the following:
				VARIANT varName;
				VariantInit(&varName);
				hr = pPropBag->Read(L"FriendlyName", &varName, 0);
	
				if (SUCCEEDED(hr))
				{
					// Display the name in your UI somehow.
					temp.Format(TEXT("%s"),varName.bstrVal);
					if(temp.Compare(wszName)==0)
					{
						// To create an instance of the filter, do the following:
						IBaseFilter *pFilter;
						hr = pMoniker->BindToObject(NULL, NULL, IID_IBaseFilter,
							(void**)&pFilter);
						// Now add the filter to the graph. 
						hr = pfG->AddFilter(pFilter,wszName);
						if(SUCCEEDED(hr))
							*ppF=pFilter ;
						else
							pFilter->Release();
					}
				}
				VariantClear(&varName);		
				pPropBag->Release();
			}
			pMoniker->Release();
		}
		pEnumCat->Release();
	}
	pSysDevEnum->Release();
}

[EDIT] Added <pre> tags for better readability - Code-o-mat [/EDIT]

Posted 4-May-12 6:13am

lanhxg

Updated 4-May-12 8:23am

v3

Solution 3

This is a solution from graph edit plus.

C++

CComPtr<ibasefilter> CreateFilterByName(const WCHAR* filterName, const GUID& category)
{
	HRESULT hr = S_OK;
	CComPtr<icreatedevenum> pSysDevEnum;
	hr = pSysDevEnum.CoCreateInstance(CLSID_SystemDeviceEnum);
	if (hrcheck(hr, "Can't create System Device Enumerator"))
	{
		return NULL;
	}
	
	CComPtr<ienummoniker> pEnumCat;
	hr = pSysDevEnum->CreateClassEnumerator(category, &pEnumCat, 0);
	if (hr == S_OK)
	{
		CComPtr<imoniker> pMoniker;
		ULONG cFetched;
		while(pEnumCat->Next(1, &pMoniker, &cFetched) == S_OK)
		{
			CComPtr<ipropertybag> pPropBag;
			hr = pMoniker->BindToStorage(0, 0, IID_IPropertyBag, (void * *)&pPropBag);
			if (SUCCEEDED(hr))
			{
				VARIANT varName;
				VariantInit(&varName);
				hr = pPropBag->Read(L"FriendlyName", &varName, 0);
				if (SUCCEEDED(hr))
				{
					if (wcscmp(filterName, varName.bstrVal)==0)
					{
						CComPtr<ibasefilter> pFilter;
						hr = pMoniker->BindToObject(NULL, NULL, IID_IBaseFilter, (void**)&pFilter);
						if (hrcheck(hr, "Can't bind moniker to filter object"))
							return NULL;
						return pFilter;
					}
				}
				VariantClear(&varName);
			}
			pMoniker.Release();
		}
	}
	return NULL;
}

And using:

C++

DEFINE_GUID(CLSID_AudioRenderers,
0xE0F158E1, 0xCB04, 0x11D0, 0xBD, 0x4E, 0x00, 0xA0, 0xC9, 0x11, 0xCE, 0x86);

//add Default DirectSound Device
	CComPtr<IBaseFilter> pDefaultDirectSoundDevice = CreateFilterByName(L"Default DirectSound Device", CLSID_AudioRenderers);
	hr = pGraph->AddFilter(pDefaultDirectSoundDevice, L"Default DirectSound Device");
	CHECK_HR(hr, "Can't add Default DirectSound Device to graph");

Posted 14-Mar-13 19:30pm

ud_

Updated 14-Mar-13 19:34pm

v3

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This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Code-o-mat · Accepted Answer · 2012-04-04T04:29:00

As stated here[^]:

The audio renderer category contains two additional filter instances, named "Default DirectSound Device" and "Default WaveOut Device." These correspond to the default sound device, as chosen by the user through the Control Panel.

So i'd say, enumerate the filters and look for one that is called "Default DirectSound Device".

how can i add a Default Directsound Device to my filter graph

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how can i add a Default Directsound Device to my filter graph

3 solutions

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