/**************************************************************************
* MMDRV_Alloc [internal]
*/
LPWINE_MLD MMDRV_Alloc(UINT size, UINT type, LPHANDLE hndl, DWORD* dwFlags,
DWORD_PTR* dwCallback, DWORD_PTR* dwInstance, BOOL bFrom32)
{
LPWINE_MLD mld;
UINT i;
TRACE("(%d, %04x, %p, %p, %p, %p, %c)\n",
size, type, hndl, dwFlags, dwCallback, dwInstance, bFrom32?'Y':'N');
mld = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, size);
if (!mld) return NULL;
/* find an empty slot in MM_MLDrvs table */
for (i = 0; i < MAX_MM_MLDRVS; i++) if (!MM_MLDrvs[i]) break;
if (i == MAX_MM_MLDRVS) {
/* the MM_MLDrvs table could be made growable in the future if needed */
ERR("Too many open drivers\n");
HeapFree(GetProcessHeap(), 0, mld);
return NULL;
}
MM_MLDrvs[i] = mld;
*hndl = (HANDLE)(i | 0x8000);
mld->type = type;
if ((UINT)*hndl < MMDRV_GetNum(type) || HIWORD(*hndl) != 0) {
/* FIXME: those conditions must be fulfilled so that:
* - we can distinguish between device IDs and handles
* - we can use handles as 16 or 32 bit entities
*/
ERR("Shouldn't happen. Bad allocation scheme\n");
}
mld->bFrom32 = bFrom32;
mld->dwFlags = HIWORD(*dwFlags);
mld->dwCallback = *dwCallback;
mld->dwClientInstance = *dwInstance;
if (llTypes[type].Callback)
{
*dwFlags = LOWORD(*dwFlags) | CALLBACK_FUNCTION;
*dwCallback = (DWORD)llTypes[type].Callback;
*dwInstance = (DWORD)mld; /* FIXME: wouldn't some 16 bit drivers only use the loword ? */
}
return mld;
}
/**************************************************************************
* midiInGetNumDevs [WINMM.@]
*/
UINT WINAPI midiInGetNumDevs(void)
{
return MMDRV_GetNum(MMDRV_MIDIIN);
}
/**************************************************************************
* midiOutGetNumDevs [WINMM.@]
*/
UINT WINAPI midiOutGetNumDevs(void)
{
return MMDRV_GetNum(MMDRV_MIDIOUT);
}
/**************************************************************************
* auxGetNumDevs [WINMM.@]
*/
UINT WINAPI auxGetNumDevs(void)
{
return MMDRV_GetNum(MMDRV_AUX);
}