虚拟声卡驱动代码

//By Fanxiushu 2011-10-24 #include "common.h" #include "top_wav.h" ///common function PWAVEFORMATEX GetWaveFormatEx( IN PKSDATAFORMAT pDataFormat ) { PWAVEFORMATEX pWfx = NULL; // If this is a known dataformat extract the waveformat info. // if ( pDataFormat && ( IsEqualGUIDAligned(pDataFormat->MajorFormat, KSDATAFORMAT_TYPE_AUDIO) && ( IsEqualGUIDAligned(pDataFormat->Specifier, KSDATAFORMAT_SPECIFIER_WAVEFORMATEX) || IsEqualGUIDAligned(pDataFormat->Specifier, KSDATAFORMAT_SPECIFIER_DSOUND) ) ) ) { pWfx = PWAVEFORMATEX(pDataFormat + 1); if (IsEqualGUIDAligned(pDataFormat->Specifier, KSDATAFORMAT_SPECIFIER_DSOUND)) { PKSDSOUND_BUFFERDESC pwfxds; pwfxds = PKSDSOUND_BUFFERDESC(pDataFormat + 1); pWfx = &pwfxds->WaveFormatEx; } } return pWfx; } NTSTATUS ValidateFormat(IN PKSDATAFORMAT pDataFormat) { NTSTATUS status = STATUS_INVALID_PARAMETER; PWAVEFORMATEX pwfx; pwfx = GetWaveFormatEx(pDataFormat); if (pwfx) { if (IS_VALID_WAVEFORMATEX_GUID(&pDataFormat->SubFormat)) { USHORT wfxID = EXTRACT_WAVEFORMATEX_ID(&pDataFormat->SubFormat); switch (wfxID) { case WAVE_FORMAT_PCM: { switch (pwfx->wFormatTag) { case WAVE_FORMAT_PCM: { if( pwfx->nChannels>=MIN_CHANNELS&&pwfx->nChannels<=MAX_CHANNELS_PCM && pwfx->wBitsPerSample>=MIN_BITS_PER_SAMPLE_PCM && pwfx->wBitsPerSample<=MAX_BITS_PER_SAMPLE_PCM && pwfx->nSamplesPerSec>=MIN_SAMPLE_RATE && pwfx->nSamplesPerSec<=MAX_SAMPLE_RATE ) { status = STATUS_SUCCESS; } break; } } break; } default: DPT("Invalid format EXTRACT_WAVEFORMATEX_ID!"); break; } } else { DPT("Invalid pDataFormat->SubFormat!" ); } } return status; } ///copy from MSVAD NTSTATUS PropertyHandler_BasicSupport ( IN PPCPROPERTY_REQUEST PropertyRequest, IN ULONG Flags, IN DWORD PropTypeSetId ) { ASSERT(Flags & KSPROPERTY_TYPE_BASICSUPPORT); NTSTATUS ntStatus = STATUS_INVALID_PARAMETER; if (PropertyRequest->ValueSize >= sizeof(KSPROPERTY_DESCRIPTION)) { // if return buffer can hold a KSPROPERTY_DESCRIPTION, return it // PKSPROPERTY_DESCRIPTION PropDesc = PKSPROPERTY_DESCRIPTION(PropertyRequest->Value); PropDesc->AccessFlags = Flags; PropDesc->DescriptionSize = sizeof(KSPROPERTY_DESCRIPTION); if (VT_ILLEGAL != PropTypeSetId) { PropDesc->PropTypeSet.Set = KSPROPTYPESETID_General; PropDesc->PropTypeSet.Id = PropTypeSetId; } else { PropDesc->PropTypeSet.Set = GUID_NULL; PropDesc->PropTypeSet.Id = 0; } PropDesc->PropTypeSet.Flags = 0; PropDesc->MembersListCount = 0; PropDesc->Reserved = 0; PropertyRequest->ValueSize = sizeof(KSPROPERTY_DESCRIPTION); ntStatus = STATUS_SUCCESS; } else if (PropertyRequest->ValueSize >= sizeof(ULONG)) { // if return buffer can hold a ULONG, return the access flags // *(PULONG(PropertyRequest->Value)) = Flags; PropertyRequest->ValueSize = sizeof(ULONG); ntStatus = STATUS_SUCCESS; } else { PropertyRequest->ValueSize = 0; ntStatus = STATUS_BUFFER_TOO_SMALL; } return ntStatus; } // PropertyHandler_BasicSupport //----------------------------------------------------------------------------- NTSTATUS ValidatePropertyParams ( IN PPCPROPERTY_REQUEST PropertyRequest, IN ULONG cbSize, IN ULONG cbInstanceSize /* = 0 */ ) { NTSTATUS ntStatus = STATUS_UNSUCCESSFUL; if (PropertyRequest && cbSize) { // If the caller is asking for ValueSize. // if (0 == PropertyRequest->ValueSize) { PropertyRequest->ValueSize = cbSize; ntStatus = STATUS_BUFFER_OVERFLOW; } // If the caller passed an invalid ValueSize. // else if (PropertyRequest->ValueSize < cbSize) { ntStatus = STATUS_BUFFER_TOO_SMALL; } else if (PropertyRequest->InstanceSize < cbInstanceSize) { ntStatus = STATUS_BUFFER_TOO_SMALL; } // If all parameters are OK. // else if (PropertyRequest->ValueSize == cbSize) { if (PropertyRequest->Value) { ntStatus = STATUS_SUCCESS; // // Caller should set ValueSize, if the property // call is successful. // } } } else { ntStatus = STATUS_INVALID_PARAMETER; } // Clear the ValueSize if unsuccessful. // if (PropertyRequest && STATUS_SUCCESS != ntStatus && STATUS_BUFFER_OVERFLOW != ntStatus) { PropertyRequest->ValueSize = 0; } return ntStatus; } // ValidatePropertyParams //// class AdapterPowerMgr: public IAdapterPowerManagement, public CUnknown { protected: DEVICE_POWER_STATE m_PowerState; public: ///// // Default CUnknown DECLARE_STD_UNKNOWN(); AdapterPowerMgr( PUNKNOWN pUnknownOuter); ~AdapterPowerMgr(); //===================================================================== // Default IAdapterPowerManagement IMP_IAdapterPowerManagement; ////////////////////////////////////////// NTSTATUS Init(PDEVICE_OBJECT fdo); }; AdapterPowerMgr::AdapterPowerMgr (PUNKNOWN pUnknownOuter):CUnknown( pUnknownOuter ) { //// m_PowerState = PowerDeviceD0; } AdapterPowerMgr::~AdapterPowerMgr() { } STDMETHODIMP AdapterPowerMgr::NonDelegatingQueryInterface( REFIID Interface, PVOID * Object ) { if (IsEqualGUIDAligned(Interface, IID_IUnknown)) { *Object = PVOID(PUNKNOWN((AdapterPowerMgr*)(this))); } else if (IsEqualGUIDAligned(Interface, IID_IAdapterPowerManagement)) { *Object = PVOID(PADAPTERPOWERMANAGEMENT(this)); } else { *Object = NULL; } if (*Object) { PUNKNOWN(*Object)->AddRef(); return STATUS_SUCCESS; } return STATUS_INVALID_PARAMETER; } NTSTATUS AdapterPowerMgr::Init(PDEVICE_OBJECT fdo) { return STATUS_SUCCESS; } ///// STDMETHODIMP_(void) AdapterPowerMgr::PowerChangeState( IN POWER_STATE NewState ) { //// if (NewState.DeviceState != m_PowerState) { // switch on new state switch (NewState.DeviceState) { case PowerDeviceD0: case PowerDeviceD1: case PowerDeviceD2: case PowerDeviceD3: m_PowerState = NewState.DeviceState; DPT("Entering D%d", (ULONG(m_PowerState) - ULONG(PowerDeviceD0)) ); break; default: DPT("Unknown Device Power State"); break; } } } STDMETHODIMP_(NTSTATUS) AdapterPowerMgr::QueryDeviceCapabilities( IN PDEVICE_CAPABILITIES PowerD