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539 lines
16 KiB
539 lines
16 KiB
/*++
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*
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* WOW v1.0
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*
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* Copyright (c) 1991, Microsoft Corporation
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*
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* WMMSTRU2.C
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* WOW32 16-bit MultiMedia structure conversion support
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* Contains support for mciSendCommand UnThunk message Parms.
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*
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* History:
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* Created 17-Jul-1992 by Stephen Estrop (stephene)
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*
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--*/
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//
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// We define NO_STRICT so that the compiler doesn't moan and groan when
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// I use the FARPROC type for the Multi-Media api loading.
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//
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#define NO_STRICT
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#include "precomp.h"
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#pragma hdrstop
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#if 0
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MODNAME(wmmstru2.c);
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//
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// The following are required for the dynamic linking of Multi-Media code
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// from within WOW. They are all defined in wmmedia.c
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//
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extern FARPROC mmAPIEatCmdEntry;
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extern FARPROC mmAPIGetParamSize;
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extern FARPROC mmAPIUnlockCmdTable;
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extern FARPROC mmAPISendCmdW;
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/**********************************************************************\
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*
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* UnThunkMciCommand16
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*
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* This function "unthunks" a 32 bit mci send command request.
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*
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* The ideas behind this function were stolen from UnThunkWMMsg16,
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* see wmsg16.c
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*
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\**********************************************************************/
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INT UnThunkMciCommand16( MCIDEVICEID devID, UINT OrigCommand, DWORD OrigFlags,
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DWORD OrigParms, DWORD NewParms, LPWSTR lpCommand,
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UINT uTable )
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{
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BOOL fReturnValNotThunked = FALSE;
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#if DBG
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static LPSTR f_name = "UnThunkMciCommand16: ";
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register int i;
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int n;
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dprintf3(( "UnThunkMciCommand :" ));
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n = sizeof(mciMessageNames) / sizeof(MCI_MESSAGE_NAMES);
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for ( i = 0; i < n; i++ ) {
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if ( mciMessageNames[i].uMsg == OrigCommand ) {
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break;
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}
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}
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dprintf3(( "OrigCommand -> %lX", (DWORD)OrigCommand ));
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dprintf3(( " Name -> %s", i != n ? mciMessageNames[i].lpstMsgName : "Unkown Name" ));
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dprintf5(( " OrigFlags -> %lX", OrigFlags ));
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dprintf5(( " OrigParms -> %lX", OrigParms ));
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dprintf5(( " NewParms -> %lX", NewParms ));
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//
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// If NewParms is 0 we shouldn't be here, I haven't got an assert
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// macro, but the following we do the same thing.
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//
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if ( NewParms == 0 ) {
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dprintf(( "%scalled with NewParms == NULL !!", f_name ));
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dprintf(( "Call StephenE NOW !!" ));
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DebugBreak();
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}
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#endif
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//
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// We have to do a manual unthunk of MCI_SYSINFO because the
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// command table is not consistent. As a command table should be
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// available now we can load it and then use it to unthunk MCI_OPEN.
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//
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switch ( OrigCommand ) {
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case MCI_OPEN:
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UnThunkOpenCmd( OrigFlags, OrigParms, NewParms );
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break;
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case MCI_SYSINFO:
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UnThunkSysInfoCmd( OrigFlags, OrigParms, NewParms );
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break;
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case MCI_STATUS:
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UnThunkStatusCmd( devID, OrigFlags, OrigParms, NewParms );
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break;
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default:
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fReturnValNotThunked = TRUE;
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break;
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}
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//
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// Do we have a command table ? It is possible that we have
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// a custom command but we did not find a custom command table, in which
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// case we should just free the pNewParms storage.
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//
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if ( lpCommand != NULL ) {
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//
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// We now parse the custom command table to see if there is a
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// return field in the parms structure.
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//
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dprintf3(( "%sUnthunking via command table", f_name ));
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UnThunkCommandViaTable( lpCommand, OrigFlags, OrigParms,
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NewParms, fReturnValNotThunked );
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//
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// Now we have finished with the command table we should unlock it.
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//
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dprintf4(( "%sUnlocking custom command table", f_name ));
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(*mmAPIUnlockCmdTable)( uTable );
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}
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//
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// All that needs to be done now is to free the storage
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// that was allocated during the ThunkXxxCmd function.
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//
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dprintf4(( "%sFreeing storage.", f_name ));
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free_w( (PBYTE)NewParms );
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return 0;
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}
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/**********************************************************************\
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* UnThunkOpenCmd
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*
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* UnThunk the Open mci command parms.
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\**********************************************************************/
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VOID UnThunkOpenCmd( DWORD OrigFlags, DWORD OrigParms, DWORD NewParms )
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{
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#if DBG
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static LPSTR f_name = "UnThunkOpenCmd: ";
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#endif
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LPMCI_OPEN_PARMS lpOpeParms = (LPMCI_OPEN_PARMS)NewParms;
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PMCI_OPEN_PARMS16 lpOpeParms16;
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WORD wDevice;
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dprintf4(( "%sCopying Device ID.", f_name ));
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GETVDMPTR( OrigParms, sizeof(MCI_OPEN_PARMS16), lpOpeParms16 );
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wDevice = LOWORD( lpOpeParms->wDeviceID );
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STOREWORD( lpOpeParms16->wDeviceID, wDevice );
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FLUSHVDMPTR( OrigParms, sizeof(MCI_OPEN_PARMS16), lpOpeParms16 );
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FREEVDMPTR( lpOpeParms16 );
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dprintf5(( "wDeviceID -> %u", wDevice ));
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if ( (OrigParms & MCI_OPEN_TYPE) && !(OrigParms & MCI_OPEN_TYPE_ID ) ) {
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dprintf3(( "%sFreeing a STRING pointer", f_name ));
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FREEPSZPTR( lpOpeParms->lpstrDeviceType );
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}
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if ( (OrigParms & MCI_OPEN_ELEMENT)
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&& !(OrigParms & MCI_OPEN_ELEMENT_ID ) ) {
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dprintf3(( "%sFreeing a STRING pointer", f_name ));
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FREEPSZPTR( lpOpeParms->lpstrElementName );
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}
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}
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/**********************************************************************\
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* UnThunkSysInfoCmd
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*
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* UnThunk the SysInfo mci command parms.
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\**********************************************************************/
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VOID UnThunkSysInfoCmd( DWORD OrigFlags, DWORD OrigParms, DWORD NewParms )
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{
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#if DBG
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static LPSTR f_name = "UnThunkSysInfoCmd: ";
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#endif
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LPMCI_SYSINFO_PARMS lpSysParms = (LPMCI_SYSINFO_PARMS)NewParms;
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//
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// Had better check that we did actually allocate
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// a pointer.
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//
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if ( lpSysParms->lpstrReturn && lpSysParms->dwRetSize ) {
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#if DBG
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if ( !(OrigFlags & MCI_SYSINFO_QUANTITY) ) {
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dprintf5(( "lpstrReturn -> %s", lpSysParms->lpstrReturn ));
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}
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else {
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dprintf5(( "lpstrReturn -> %d", *(LPDWORD)lpSysParms->lpstrReturn ));
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}
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#endif
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//
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// Free lpSysParms->lpstrReturn;
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//
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dprintf4(( "%sFreeing lpstrReturn", f_name ));
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FREEVDMPTR( lpSysParms->lpstrReturn );
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}
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}
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/**********************************************************************\
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* UnThunkMciStatus
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*
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* UnThunk the Status mci command parms.
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\**********************************************************************/
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VOID UnThunkStatusCmd( MCIDEVICEID devID, DWORD OrigFlags,
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DWORD OrigParms, DWORD NewParms )
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{
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#if DBG
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static LPSTR f_name = "UnThunkStatusCmd: ";
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#endif
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MCI_GETDEVCAPS_PARMS GetDevCaps;
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DWORD dwRetVal;
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DWORD dwParm16;
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PDWORD pdwOrig16;
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PDWORD pdwParm32;
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int iReturnType = MCI_INTEGER;
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/*
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** If the MCI_STATUS_ITEM flag is not specified don't bother
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** doing any unthunking.
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*/
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if ( !(OrigFlags & MCI_STATUS_ITEM) ) {
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return;
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}
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/*
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** We need to determine what type of device we are
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** dealing with. We can do this by send an MCI_GETDEVCAPS
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** command to the device. (We might as well use the Unicode
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** version of mciSendCommand and avoid another thunk).
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*/
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RtlZeroMemory( &GetDevCaps, sizeof(MCI_GETDEVCAPS_PARMS) );
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GetDevCaps.dwItem = MCI_GETDEVCAPS_DEVICE_TYPE;
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dwRetVal = (*mmAPISendCmdW)( devID, MCI_GETDEVCAPS, MCI_GETDEVCAPS_ITEM,
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(DWORD)&GetDevCaps );
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/*
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** If we can't get the DevCaps then we are doomed.
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*/
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if ( dwRetVal ) {
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dprintf(("%sFailure to get devcaps", f_name));
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return;
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}
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/*
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** Determine the dwReturn type.
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*/
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switch ( GetDevCaps.dwReturn ) {
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case MCI_DEVTYPE_ANIMATION:
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switch ( ((LPDWORD)NewParms)[2] ) {
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case MCI_ANIM_STATUS_HWND:
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iReturnType = MCI_HWND;
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break;
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case MCI_ANIM_STATUS_HPAL:
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iReturnType = MCI_HPAL;
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break;
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}
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break;
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case MCI_DEVTYPE_OVERLAY:
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if ( ((LPDWORD)NewParms)[2] == MCI_OVLY_STATUS_HWND ) {
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iReturnType = MCI_HWND;
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}
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break;
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case MCI_DEVTYPE_DIGITAL_VIDEO:
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switch ( ((LPDWORD)NewParms)[2] ) {
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case MCI_DGV_STATUS_HWND:
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iReturnType = MCI_HWND;
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break;
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case MCI_DGV_STATUS_HPAL:
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iReturnType = MCI_HPAL;
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break;
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}
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break;
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}
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/*
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** Thunk the dwReturn value according to the required type
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*/
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GETVDMPTR( OrigParms, sizeof( MCI_STATUS_PARMS), pdwOrig16 );
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pdwParm32 = (LPDWORD)((LPBYTE)NewParms + 4);
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switch ( iReturnType ) {
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case MCI_HPAL:
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dprintf4(( "%sFound an HPAL return field", f_name ));
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dwParm16 = MAKELONG( GETHPALETTE16( (HPALETTE)*pdwParm32 ), 0 );
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STOREDWORD( *(LPDWORD)((LPBYTE)pdwOrig16 + 4), dwParm16 );
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dprintf5(( "HDC32 -> 0x%lX", *pdwParm32 ));
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dprintf5(( "HDC16 -> 0x%lX", dwParm16 ));
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break;
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case MCI_HWND:
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dprintf4(( "%sFound an HWND return field", f_name ));
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dwParm16 = MAKELONG( GETHWND16( (HWND)*pdwParm32 ), 0 );
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STOREDWORD( *(LPDWORD)((LPBYTE)pdwOrig16 + 4), dwParm16 );
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dprintf5(( "HWND32 -> 0x%lX", *pdwParm32 ));
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dprintf5(( "HWND16 -> 0x%lX", dwParm16 ));
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break;
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case MCI_INTEGER:
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dprintf4(( "%sFound an INTEGER return field", f_name ));
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STOREDWORD( *(LPDWORD)((LPBYTE)pdwOrig16 + 4), *pdwParm32 );
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dprintf5(( "INTEGER -> %ld", *pdwParm32 ));
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break;
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// no default: all possible cases accounted for
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}
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/*
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** Free the VDM pointer as we have finished with it
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*/
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FLUSHVDMPTR( OrigParms, sizeof( MCI_STATUS_PARMS), pdwOrig16 );
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FREEVDMPTR( pdwOrig16 );
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}
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/**********************************************************************\
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* UnThunkCommandViaTable
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*
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* Thunks the return field if there is one and then frees and pointers
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* that were got via GETVDMPTR or GETPSZPTR.
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\**********************************************************************/
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INT UnThunkCommandViaTable( LPWSTR lpCommand, DWORD dwFlags, DWORD OrigParms,
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DWORD pNewParms, BOOL fReturnValNotThunked )
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{
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#if DBG
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static LPSTR f_name = "UnThunkCommandViaTable: ";
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#endif
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LPWSTR lpFirstParameter;
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UINT wID;
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DWORD dwValue;
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UINT wOffset32, wOffset1stParm32;
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DWORD dwParm16;
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DWORD Size;
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PDWORD pdwOrig16;
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PDWORD pdwParm32;
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DWORD dwMask = 1;
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//
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// Calculate the size of this command parameter block in terms
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// of bytes, then get a VDM pointer to the OrigParms.
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//
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Size = GetSizeOfParameter( lpCommand );
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//
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// Skip past command entry
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//
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lpCommand = (LPWSTR)((LPBYTE)lpCommand +
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(*mmAPIEatCmdEntry)( lpCommand, NULL, NULL ));
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//
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// Get the next entry
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//
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lpFirstParameter = lpCommand;
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//
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// Skip past the DWORD return value
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//
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wOffset1stParm32 = 4;
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lpCommand = (LPWSTR)((LPBYTE)lpCommand +
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(*mmAPIEatCmdEntry)( lpCommand, &dwValue, &wID ));
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//
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// If it is a return value, skip it
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//
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if ( (wID == MCI_RETURN) && (fReturnValNotThunked) ) {
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GETVDMPTR( OrigParms, Size, pdwOrig16 );
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pdwParm32 = (LPDWORD)((LPBYTE)pNewParms + 4);
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//
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// Look for a string return type, these are a special case.
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//
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switch ( dwValue ) {
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case MCI_STRING:
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dprintf4(( "%sFound a STRING return field", f_name ));
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//
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// Get string pointer and length
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//
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Size = *(LPDWORD)((LPBYTE)pNewParms + 8);
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//
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// Get the 32 bit string pointer
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//
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if ( Size > 0 ) {
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dprintf4(( "%sFreeing a return STRING pointer", f_name ));
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dprintf5(( "STRING -> %s", (LPSTR)*pdwParm32 ));
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FREEVDMPTR( (LPSTR)*pdwParm32 );
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}
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break;
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case MCI_RECT:
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{
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PRECT pRect32 = (PRECT)((LPBYTE)pNewParms + 4);
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PRECT16 pRect16 = (PRECT16)((LPBYTE)pdwOrig16 + 4);
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dprintf4(( "%sFound a RECT return field", f_name ));
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STORESHORT( pRect16->top, (SHORT)pRect32->top );
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STORESHORT( pRect16->bottom, (SHORT)pRect32->bottom );
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STORESHORT( pRect16->left, (SHORT)pRect32->left );
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STORESHORT( pRect16->right, (SHORT)pRect32->right );
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}
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break;
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case MCI_INTEGER:
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//
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// Get the 32 bit return integer and store it in the
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// 16 bit parameter structure.
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//
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dprintf4(( "%sFound an INTEGER return field", f_name ));
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STOREDWORD( *(LPDWORD)((LPBYTE)pdwOrig16 + 4), *pdwParm32 );
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dprintf5(( "INTEGER -> %ld", *pdwParm32 ));
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break;
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case MCI_HWND:
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dprintf4(( "%sFound an HWND return field", f_name ));
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dwParm16 = MAKELONG( GETHWND16( (HWND)*pdwParm32 ), 0 );
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STOREDWORD( *(LPDWORD)((LPBYTE)pdwOrig16 + 4), dwParm16 );
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dprintf5(( "HWND32 -> 0x%lX", *pdwParm32 ));
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dprintf5(( "HWND16 -> 0x%lX", dwParm16 ));
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break;
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case MCI_HPAL:
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dprintf4(( "%sFound an HPAL return field", f_name ));
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dwParm16 = MAKELONG( GETHPALETTE16( (HPALETTE)*pdwParm32 ), 0 );
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STOREDWORD( *(LPDWORD)((LPBYTE)pdwOrig16 + 4), dwParm16 );
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dprintf5(( "HDC32 -> 0x%lX", *pdwParm32 ));
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dprintf5(( "HDC16 -> 0x%lX", dwParm16 ));
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break;
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case MCI_HDC:
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dprintf4(( "%sFound an HDC return field", f_name ));
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dwParm16 = MAKELONG( GETHDC16( (HDC)*pdwParm32 ), 0 );
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STOREDWORD( *(LPDWORD)((LPBYTE)pdwOrig16 + 4), dwParm16 );
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dprintf5(( "HDC32 -> 0x%lX", *pdwParm32 ));
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dprintf5(( "HDC16 -> 0x%lX", dwParm16 ));
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break;
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}
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//
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// Free the VDM pointer as we have finished with it
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//
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FLUSHVDMPTR( OrigParms, Size, pdwOrig16 );
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FREEVDMPTR( pdwOrig16 );
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//
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// Adjust the offset of the first parameter.
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//
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wOffset1stParm32 = (*mmAPIGetParamSize)( dwValue, wID );
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//
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// Save the new first parameter
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//
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lpFirstParameter = lpCommand;
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}
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//
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// Walk through each flag looking for strings to free
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//
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while ( dwMask != 0 ) {
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//
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// Is this bit set?
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//
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if ( (dwFlags & dwMask) != 0 ) {
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wOffset32 = wOffset1stParm32;
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lpCommand = (LPWSTR)((LPBYTE)lpFirstParameter +
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(*mmAPIEatCmdEntry)( lpFirstParameter,
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&dwValue, &wID ));
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//
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// What parameter uses this bit?
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//
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while ( wID != MCI_END_COMMAND && dwValue != dwMask ) {
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wOffset32 = (*mmAPIGetParamSize)( dwValue, wID );
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if ( wID == MCI_CONSTANT ) {
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while ( wID != MCI_END_CONSTANT ) {
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lpCommand = (LPWSTR)((LPBYTE)lpCommand +
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|
(*mmAPIEatCmdEntry)( lpCommand, NULL, &wID ));
|
|
}
|
|
}
|
|
lpCommand = (LPWSTR)((LPBYTE)lpCommand +
|
|
(*mmAPIEatCmdEntry)( lpCommand, &dwValue, &wID ));
|
|
}
|
|
|
|
if ( wID == MCI_STRING ) {
|
|
dprintf4(( "%sFreeing a STRING pointer", f_name ));
|
|
pdwParm32 = (LPDWORD)((LPBYTE)pNewParms + wOffset32);
|
|
FREEPSZPTR( (LPSTR)*pdwParm32 );
|
|
}
|
|
}
|
|
|
|
//
|
|
// Go to the next flag
|
|
//
|
|
dwMask <<= 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
#endif
|