97 lines
3 KiB
C
97 lines
3 KiB
C
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/*
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* DirectSound DirectMediaObject base classes
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*
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* Copyright (c) 1999 - 2000 Microsoft Corporation. All Rights Reserved.
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*/
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#ifndef _DsDmoBase_
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#define _DsDmoBase_
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#define DMO_NOATL
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#include <objbase.h>
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#include <dmobase.h>
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#include <medparam.h>
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#include <mmsystem.h>
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#include <dsoundp.h>
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#ifndef RELEASE
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#define RELEASE(x) { if (x) (x)->Release(); x = NULL; }
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#endif
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// Macro to handle QueryInterface in the derived class for interfaces
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// implemented by this base class.
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//
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#define IMP_DSDMO_QI(iid, ppv) \
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{ \
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*ppv = NULL; \
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if (iid == IID_IPersistStream) *ppv = (void**)static_cast<IPersistStream*>(this); \
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else if (iid == IID_IMediaObjectInPlace) *ppv = (void**)static_cast<IMediaObjectInPlace*>(this); \
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else if (iid == IID_IDirectSoundDMOProxy) *ppv = (void**)static_cast<IDirectSoundDMOProxy*>(this); \
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if (*ppv) \
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{ \
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AddRef(); \
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return S_OK; \
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} \
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}
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class CDirectSoundDMO :
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public CPCMDMO,
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public IPersistStream,
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public IMediaObjectInPlace,
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public IDirectSoundDMOProxy
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{
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public:
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CDirectSoundDMO();
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virtual ~CDirectSoundDMO();
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/* IPersist */
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STDMETHODIMP GetClassID (THIS_ CLSID *pClassID);
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/* IPersistStream */
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STDMETHODIMP IsDirty (THIS);
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STDMETHODIMP Load (THIS_ IStream *pStm);
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STDMETHODIMP Save (THIS_ IStream *pStm, BOOL fClearDirty);
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STDMETHODIMP GetSizeMax (THIS_ ULARGE_INTEGER *pcbSize);
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/* IMediaObjectInPlace */
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STDMETHODIMP Process (THIS_ ULONG ulSize, BYTE *pData, REFERENCE_TIME rtStart, DWORD dwFlags);
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STDMETHODIMP GetLatency (THIS_ REFERENCE_TIME *prt);
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/* IDirectSoundDMOProxy */
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STDMETHODIMP AcquireResources (THIS_ IKsPropertySet *pKsPropertySet);
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STDMETHODIMP ReleaseResources (THIS);
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STDMETHODIMP InitializeNode (THIS_ HANDLE hPin, ULONG ulNodeId);
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protected:
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// Information about each parameter. This is only needed by the
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// author time object.
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//
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// Process in place
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//
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virtual HRESULT ProcessInPlace(ULONG ulQuanta, LPBYTE pcbData, REFERENCE_TIME rtStart, DWORD dwFlags) = 0;
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// Send a parameter to the hardware. Called by the base class on SetParam if
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// hardware is connected. This is virtual so a DMO can use the base class but
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// override the way it talks to hardware.
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//
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virtual HRESULT ProxySetParam(DWORD dwParamIndex, MP_DATA value);
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// Derived class can use this to determine if hardware is turned on.
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//
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inline bool IsInHardware()
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{ return m_fInHardware; }
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protected:
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HANDLE m_hPin;
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ULONG m_ulNodeId;
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private:
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MP_DATA *m_mpvCache;
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IKsPropertySet *m_pKsPropertySet;
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bool m_fInHardware;
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};
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#endif
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