msacmdrv.h

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#ifndef _MSACMDRV_H_
#define _MSACMDRV_H_

#include <mmreg.h>
#include <msacm.h>

#define MAKE_ACM_VERSION(mjr, mnr, bld) (((long)(mjr)<<24)| \
                                         ((long)(mnr)<<16)| \
                                         ((long)bld))

#define VERSION_MSACM       MAKE_ACM_VERSION(3, 50, 0)

//#if (WINVER >= 0x0400)
 #define VERSION_ACM_DRIVER  MAKE_ACM_VERSION(4,  0, 0)
//#else
// #define VERSION_ACM_DRIVER  MAKE_ACM_VERSION(3, 51, 0)
//#endif

#ifndef ACMDRIVERDETAILS_FCCTYPE_AUDIOCODEC
#define ACMDRIVERDETAILS_FCCTYPE_AUDIOCODEC mmioFOURCC('a', 'u', 'd', 'c')
#endif

#ifndef ACMDM_BASE
#define ACMDM_BASE                  ACMDM_RESERVED_LOW

DECLARE_HANDLE(HACMSTREAM);
typedef HACMSTREAM         *PHACMSTREAM;
typedef HACMSTREAM     FAR *LPHACMSTREAM;

#endif

#ifndef ACMDM_DRIVER_ABOUT
#define ACMDM_DRIVER_ABOUT          (ACMDM_BASE + 11)
#endif

#ifndef ACMDM_RESERVED_LOW
#define ACMDM_RESERVED_LOW          (DRV_USER + 0x2000)
#endif

#define ACMDM_DRIVER_NOTIFY             (ACMDM_BASE + 1)
#define ACMDM_DRIVER_DETAILS            (ACMDM_BASE + 10)

#define ACMDM_HARDWARE_WAVE_CAPS_INPUT  (ACMDM_BASE + 20)
#define ACMDM_HARDWARE_WAVE_CAPS_OUTPUT (ACMDM_BASE + 21)

#define ACMDM_FORMATTAG_DETAILS         (ACMDM_BASE + 25)
#define ACMDM_FORMAT_DETAILS            (ACMDM_BASE + 26)
#define ACMDM_FORMAT_SUGGEST            (ACMDM_BASE + 27)

#define ACMDM_FILTERTAG_DETAILS         (ACMDM_BASE + 50)
#define ACMDM_FILTER_DETAILS            (ACMDM_BASE + 51)

#define ACMDM_STREAM_OPEN               (ACMDM_BASE + 76)
#define ACMDM_STREAM_CLOSE              (ACMDM_BASE + 77)
#define ACMDM_STREAM_SIZE               (ACMDM_BASE + 78)
#define ACMDM_STREAM_CONVERT            (ACMDM_BASE + 79)
#define ACMDM_STREAM_RESET              (ACMDM_BASE + 80)
#define ACMDM_STREAM_PREPARE            (ACMDM_BASE + 81)
#define ACMDM_STREAM_UNPREPARE          (ACMDM_BASE + 82)

typedef struct tACMDRVFORMATSUGGEST
{
    DWORD               cbStruct;           // sizeof(ACMDRVFORMATSUGGEST)
    DWORD               fdwSuggest;         // Suggest flags
    LPWAVEFORMATEX      pwfxSrc;            // Source Format
    DWORD               cbwfxSrc;           // Source Size
    LPWAVEFORMATEX      pwfxDst;            // Dest format
    DWORD               cbwfxDst;           // Dest Size

} ACMDRVFORMATSUGGEST, *PACMDRVFORMATSUGGEST, FAR *LPACMDRVFORMATSUGGEST;

typedef struct tACMDRVSTREAMINSTANCE
{
    DWORD               cbStruct;
    LPWAVEFORMATEX      pwfxSrc;
    LPWAVEFORMATEX      pwfxDst;
    LPWAVEFILTER        pwfltr;
    DWORD_PTR           dwCallback;
    DWORD_PTR           dwInstance;
    DWORD               fdwOpen;
    DWORD               fdwDriver;
    DWORD_PTR           dwDriver;
    HACMSTREAM          has;

} ACMDRVSTREAMINSTANCE, *PACMDRVSTREAMINSTANCE, FAR *LPACMDRVSTREAMINSTANCE;

typedef struct tACMDRVSTREAMSIZE
{
    DWORD               cbStruct;
    DWORD               fdwSize;
    DWORD               cbSrcLength;
    DWORD               cbDstLength;

} ACMDRVSTREAMSIZE, *PACMDRVSTREAMSIZE, FAR *LPACMDRVSTREAMSIZE;

typedef struct tACMDRVSTREAMHEADER FAR *LPACMDRVSTREAMHEADER;
typedef struct tACMDRVSTREAMHEADER
{
    DWORD                   cbStruct;
    DWORD                   fdwStatus;
    DWORD_PTR               dwUser;
    LPBYTE                  pbSrc;
    DWORD                   cbSrcLength;
    DWORD                   cbSrcLengthUsed;
    DWORD_PTR               dwSrcUser;
    LPBYTE                  pbDst;
    DWORD                   cbDstLength;
    DWORD                   cbDstLengthUsed;
    DWORD_PTR               dwDstUser;

    DWORD                   fdwConvert;     // flags passed from convert func
    LPACMDRVSTREAMHEADER    padshNext;      // for async driver queueing
    DWORD                   fdwDriver;      // driver instance flags
    DWORD_PTR               dwDriver;       // driver instance data

    //
    //  all remaining fields are used by the ACM for bookkeeping purposes.
    //  an ACM driver should never use these fields (though than can be
    //  helpful for debugging)--note that the meaning of these fields
    //  may change, so do NOT rely on them in shipping code.
    //
    DWORD                   fdwPrepared;
    DWORD_PTR               dwPrepared;
    LPBYTE                  pbPreparedSrc;
    DWORD                   cbPreparedSrcLength;
    LPBYTE                  pbPreparedDst;
    DWORD                   cbPreparedDstLength;

} ACMDRVSTREAMHEADER, *PACMDRVSTREAMHEADER;

typedef struct {
    DWORD   cbStruct;       // sizeof(ACMDRVOPENDESC)
    FOURCC  fccType;        // 'audc'
    FOURCC  fccComp;        // sub-type (not used--must be 0)
    DWORD   dwVersion;      // current version of ACM opening you
    DWORD   dwFlags;        //
    DWORD   dwError;        // result from DRV_OPEN request
    LPWSTR  pszSectionName; // see DRVCONFIGINFO.lpszDCISectionName
    LPWSTR  pszAliasName;   // see DRVCONFIGINFO.lpszDCIAliasName
    DWORD	dnDevNode;  // devnode id for pnp drivers.
} ACMDRVOPENDESCW;

#endif