/****************************************************************************
    thunks.h

    Contains definitions for thunking msvideo.dll from 16bit to 32bit

    Copyright (c) Microsoft Corporation 1993. All rights reserved

****************************************************************************/


// NOTE - 32bit handles have 0x8000 'or'ed in - this makes a BIG ASSUMPTION
// about how handles are generated on the 32-bit side.  We ASSUME here
// that :

//    32bit msvideo.dll always uses OpenDriver to create handles

//    The OpenDriver returns indices into its table (ie small positive
//    numbers).


#define  Is32bitHandle(h) (((h) & 0x8000) != 0)
#define  Make32bitHandle(h) ((h) | 0x8000)
#define  Map32bitHandle(h) ((h) & 0x7FFF)



// Functions to link and unlink to 32-bit side

void _loadds FAR UnregisterDLL(void);
BOOL _loadds FAR RegisterDLL(void);



// The following functions generate calls to the 32-bit side


#ifdef _INC_MSVIDEO

DWORD FAR PASCAL videoMessage32(HVIDEO hVideo, UINT msg, DWORD dwP1, DWORD dwP2);
DWORD FAR PASCAL videoGetNumDevs32(void);
DWORD FAR PASCAL videoClose32(HVIDEO hVideo);
DWORD FAR PASCAL videoOpen32(LPHVIDEO lphVideo, DWORD dwDeviceID, DWORD dwFlags);
DWORD FAR PASCAL videoGetDriverDesc32(DWORD wDriverIndex,
                    LPSTR lpszName, short cbName,
                    LPSTR lpszVer, short cbVer);


#endif // _INC_MSVIDEO

#ifdef _INC_COMPMAN

BOOL FAR PASCAL ICInfo32(DWORD fccType, DWORD fccHandler, ICINFO FAR * lpicInfo);
LRESULT FAR PASCAL ICSendMessage32(DWORD hic, UINT msg, DWORD dwP1, DWORD dwP2);
DWORD FAR PASCAL ICOpen32(DWORD fccType, DWORD fccHandler, UINT wMode);
LRESULT FAR PASCAL ICClose32(DWORD hic);

#endif // _INC_COMPMAN