/*++Copyright (c) 1997-2000  Microsoft Corporation All Rights Reserved Module Name:    minstream.h Abstract:    Definition of wavecyclic miniport class.--*/ #ifndef _MSVAD_MINSTREAM_H_#define _MSVAD_MINSTREAM_H_ #include "savedata.h"#include "ivshmemsavedata.h" //=============================================================================// Referenced Forward//=============================================================================class CMiniportWaveCyclic;typedef CMiniportWaveCyclic* PCMiniportWaveCyclic; //=============================================================================// Classes//=============================================================================///////////////////////////////////////////////////////////////////////////////// CMiniportWaveCyclicStream // It implements basic functionality for wavecyclic streams. class CMiniportWaveCyclicStream : public IMiniportWaveCyclicStream, public IDmaChannel, public CUnknown {protected:	PCMiniportWaveCyclic        m_pMiniport;                        // Miniport that created us    BOOLEAN                     m_fCapture;                         // Capture or render.    BOOLEAN                     m_fFormat16Bit;                     // 16- or 8-bit samples.    USHORT                      m_usBlockAlign;                     // Block alignment of current format.    KSSTATE                     m_ksState;                          // Stop, pause, run.    ULONG                       m_ulPin;                            // Pin Id.     PRKDPC                      m_pDpc;                             // Deferred procedure call object    PKTIMER                     m_pTimer;                           // Timer object     BOOLEAN                     m_fDmaActive;                       // Dma currently active?     ULONG                       m_ulDmaPosition;                    // Position in Dma    PVOID                       m_pvDmaBuffer;                      // Dma buffer pointer    ULONG                       m_ulDmaBufferSize;                  // Size of dma buffer    ULONG                       m_ulDmaMovementRate;                // Rate of transfer specific to system    ULONGLONG                   m_ullDmaTimeStamp;                  // Dma time elasped     ULONGLONG                   m_ullElapsedTimeCarryForward;       // Time to carry forward in position calc.    ULONG                       m_ulByteDisplacementCarryForward;   // Bytes to carry forward to next calc.     CSaveData                   m_SaveData;                         // Object to save settings.    CIVSHMEMSaveData            m_IVSHMEMSaveData;                  // Object to save settings if we are using IVSHMEM.     ULONGLONG                   m_silenceState = 0;                 // 0 = Not Silent, >g_silenceThreshold=Silent,                                                                    // values lower than threshold = Gap    WORD                        m_bitsPerSample;    BYTE                        m_bChannels;   public:    DECLARE_STD_UNKNOWN();    CMiniportWaveCyclicStream(PUNKNOWN other);    ~CMiniportWaveCyclicStream(); 	STDMETHODIMP_(NTSTATUS) AllocateBuffer(IN ULONG BufferSize, IN PPHYSICAL_ADDRESS PhysicalAddressConstraint OPTIONAL);	STDMETHODIMP_(ULONG) CMiniportWaveCyclicStream::AllocatedBufferSize(void);	STDMETHODIMP_(ULONG) CMiniportWaveCyclicStream::BufferSize(void);	STDMETHODIMP_(void) CMiniportWaveCyclicStream::CopyFrom(IN PVOID Destination, IN PVOID Source, IN ULONG ByteCount);	STDMETHODIMP_(void) CMiniportWaveCyclicStream::CopyTo(		IN  PVOID                   Destination,		IN  PVOID                   Source,		IN  ULONG                   ByteCount		);	STDMETHODIMP_(void) CMiniportWaveCyclicStream::FreeBuffer(void);	STDMETHODIMP_(PADAPTER_OBJECT) CMiniportWaveCyclicStream::GetAdapterObject(void);	STDMETHODIMP_(ULONG) CMiniportWaveCyclicStream::MaximumBufferSize(void);	STDMETHODIMP_(PHYSICAL_ADDRESS) CMiniportWaveCyclicStream::PhysicalAddress(void);	STDMETHODIMP_(void) CMiniportWaveCyclicStream::SetBufferSize(		IN ULONG                    BufferSize		);	STDMETHODIMP_(PVOID) CMiniportWaveCyclicStream::SystemAddress(void);	STDMETHODIMP_(ULONG) CMiniportWaveCyclicStream::TransferCount(void);     IMP_IMiniportWaveCyclicStream;    IMP_IDmaChannel;     NTSTATUS Init(IN PCMiniportWaveCyclic Miniport, IN ULONG Channel, IN  BOOLEAN Capture, IN PKSDATAFORMAT DataFormat);     // Friends    friend class                CMiniportWaveCyclic;};typedef CMiniportWaveCyclicStream *PCMiniportWaveCyclicStream; #endif