63 lines
1.8 KiB
C
63 lines
1.8 KiB
C
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// helper function for implementing the Clone method on DMOs
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#pragma once
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#include "dsdmobse.h"
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template<class TypeOf_CDirectSoundDMO, class TypeOf_ParamsStruct>
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HRESULT StandardDMOClone(TypeOf_CDirectSoundDMO *pThis, IMediaObjectInPlace **ppCloned);
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// implementation...
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// The end of StandardDMOClone is the same for all types. Implement it outside the template
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// so that the code isn't duplicated. Copies the input and output types, does the QI for IMediaObjectInPlace,
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// and returns with the correct ref count.
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HRESULT StandardDMOClone_Ending(IMediaObject *pThis, IMediaObject *pCloned, IMediaObjectInPlace **ppCloned);
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template<class TypeOf_CDirectSoundDMO, class TypeOf_ParamsStruct>
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HRESULT StandardDMOClone(TypeOf_CDirectSoundDMO *pThis, IMediaObjectInPlace **ppCloned)
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{
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if (!ppCloned)
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return E_POINTER;
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HRESULT hr = S_OK;
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TypeOf_CDirectSoundDMO *pCloned = NULL;
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IUnknown *pUnk = NULL;
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IMediaObject * pClonedMediaObject = NULL;
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try
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{
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pCloned = new TypeOf_CDirectSoundDMO( NULL, &hr );
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if( SUCCEEDED( hr ) )
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{
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hr = pCloned->NDQueryInterface( IID_IUnknown, (void **) &pUnk );
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if( SUCCEEDED(hr ) )
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{
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hr = pUnk->QueryInterface( IID_IMediaObject, (void **) &pClonedMediaObject );
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pUnk->Release();
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}
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}
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} catch(...) {}
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if (pCloned == NULL)
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{
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return hr;
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}
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// Copy parameter control information
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if (SUCCEEDED(hr))
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hr = pCloned->CopyParamsFromSource(pThis);
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// Copy current parameter values
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TypeOf_ParamsStruct params;
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if (SUCCEEDED(hr))
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hr = pThis->GetAllParameters(¶ms);
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if (SUCCEEDED(hr))
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hr = pCloned->SetAllParameters(¶ms);
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if (SUCCEEDED(hr))
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hr = StandardDMOClone_Ending(pThis, pClonedMediaObject, ppCloned);
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return hr;
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}
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