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Added more MIDI messages 16<=>32 mapping. 

Fixes some bugs in buffers handling and index for MAPPER.
oldstable
Eric Pouech 2000-01-04 01:04:48 +00:00 committed by Alexandre Julliard
parent 20fede7f38
commit 282377824d
3 changed files with 260 additions and 35 deletions
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286
dlls/winmm/lolvldrv.c
View File

@ -51,7 +51,7 @@ typedef enum {
MMDRV_MAP_PASS /* not handled (no memory allocated) to be sent to the driver */
} MMDRV_MapType;
typedef MMDRV_MapType (*MMDRV_MAPFUNC )(UINT wMsg, LPDWORD lpdwUser, LPDWORD lpParam1, LPDWORD lpParam2);
typedef MMDRV_MapType (*MMDRV_MAPFUNC)(UINT wMsg, LPDWORD lpdwUser, LPDWORD lpParam1, LPDWORD lpParam2);
/* each known type of driver has an instance of this structure */
typedef struct tagWINE_LLTYPE {
@ -354,21 +354,25 @@ static void CALLBACK MMDRV_MidiIn_Callback(HDRVR hDev, UINT uMsg, DWORD dwInstan
/* dwParam1 points to a MidiHdr, work to be done !!! */
if (mld->bFrom32 && !MMDrvs[mld->mmdIndex].bIs32) {
/* initial map is: 32 => 16 */
LPMIDIHDR wh16 = (LPMIDIHDR)PTR_SEG_TO_LIN(dwParam1);
LPMIDIHDR wh32 = *(LPMIDIHDR*)((LPSTR)wh16 - sizeof(LPMIDIHDR));
LPMIDIHDR mh16 = (LPMIDIHDR)PTR_SEG_TO_LIN(dwParam1);
LPMIDIHDR mh32 = *(LPMIDIHDR*)((LPSTR)mh16 - sizeof(LPMIDIHDR));
dwParam1 = (DWORD)wh32;
wh32->dwFlags = wh16->dwFlags;
wh32->dwBytesRecorded = wh16->dwBytesRecorded;
dwParam1 = (DWORD)mh32;
mh32->dwFlags = mh16->dwFlags;
mh32->dwBytesRecorded = mh16->dwBytesRecorded;
if (mh32->reserved >= sizeof(MIDIHDR))
mh32->dwOffset = mh16->dwOffset;
} else if (!mld->bFrom32 && MMDrvs[mld->mmdIndex].bIs32) {
/* initial map is: 16 => 32 */
LPMIDIHDR wh32 = (LPMIDIHDR)(dwParam1);
LPMIDIHDR segwh16 = *(LPMIDIHDR*)((LPSTR)wh32 - sizeof(LPMIDIHDR));
LPMIDIHDR wh16 = PTR_SEG_TO_LIN(segwh16);
LPMIDIHDR mh32 = (LPMIDIHDR)(dwParam1);
LPMIDIHDR segmh16 = *(LPMIDIHDR*)((LPSTR)mh32 - sizeof(LPMIDIHDR));
LPMIDIHDR mh16 = PTR_SEG_TO_LIN(segmh16);
dwParam1 = (DWORD)segwh16;
wh16->dwFlags = wh32->dwFlags;
wh16->dwBytesRecorded = wh32->dwBytesRecorded;
dwParam1 = (DWORD)segmh16;
mh16->dwFlags = mh32->dwFlags;
mh16->dwBytesRecorded = mh32->dwBytesRecorded;
if (mh16->reserved >= sizeof(MIDIHDR))
mh16->dwOffset = mh32->dwOffset;
}
/* else { 16 => 16 or 32 => 32, nothing to do, same struct is kept }*/
break;
@ -401,6 +405,7 @@ static MMDRV_MapType MMDRV_MidiOut_Map16To32A (UINT wMsg, LPDWORD lpdwUser, LPD
case MODM_OPEN:
case MODM_CLOSE:
case MODM_GETVOLUME:
FIXME("Shouldn't be used: the corresponding 16 bit functions use the 32 bit interface\n");
break;
@ -422,9 +427,52 @@ static MMDRV_MapType MMDRV_MidiOut_Map16To32A (UINT wMsg, LPDWORD lpdwUser, LPD
}
break;
case MODM_PREPARE:
{
LPMIDIHDR mh32 = HeapAlloc(GetProcessHeap(), 0, sizeof(LPMIDIHDR) + sizeof(MIDIHDR));
LPMIDIHDR mh16 = PTR_SEG_TO_LIN(*lpParam1);
if (mh32) {
*(LPMIDIHDR*)mh32 = (LPMIDIHDR)*lpParam1;
mh32 = (LPMIDIHDR)((LPSTR)mh32 + sizeof(LPMIDIHDR));
mh32->lpData = PTR_SEG_TO_LIN(mh16->lpData);
mh32->dwBufferLength = mh16->dwBufferLength;
mh32->dwBytesRecorded = mh16->dwBytesRecorded;
mh32->dwUser = mh16->dwUser;
mh32->dwFlags = mh16->dwFlags;
/* FIXME: nothing on mh32->lpNext */
/* could link the mh32->lpNext at this level for memory house keeping */
mh32->dwOffset = (*lpParam2 >= sizeof(MIDIHDR)) ? ((LPMIDIHDR)mh16)->dwOffset : 0;
mh16->lpNext = mh32; /* for reuse in unprepare and write */
/* store size of passed MIDIHDR?? structure to know if dwOffset is available or not */
mh16->reserved = *lpParam2;
*lpParam1 = (DWORD)mh32;
*lpParam2 = sizeof(MIDIHDR);
ret = MMDRV_MAP_OKMEM;
} else {
ret = MMDRV_MAP_NOMEM;
}
}
break;
case MODM_UNPREPARE:
case MODM_LONGDATA:
case MODM_GETVOLUME:
{
LPMIDIHDR mh16 = PTR_SEG_TO_LIN(*lpParam1);
LPMIDIHDR mh32 = (LPMIDIHDR)mh16->lpNext;
*lpParam1 = (DWORD)mh32;
*lpParam2 = sizeof(MIDIHDR);
/* dwBufferLength can be reduced between prepare & write */
if (mh32->dwBufferLength < mh16->dwBufferLength) {
ERR("Size of buffer has been increased (%ld, %ld)\n",
mh32->dwBufferLength, mh16->dwBufferLength);
return MMDRV_MAP_MSGERROR;
}
mh32->dwBufferLength = mh16->dwBufferLength;
ret = MMDRV_MAP_OKMEM;
}
break;
case MODM_CACHEPATCHES:
case MODM_CACHEDRUMPATCHES:
default:
@ -451,6 +499,7 @@ static MMDRV_MapType MMDRV_MidiOut_UnMap16To32A(UINT wMsg, LPDWORD lpdwUser, LPD
case MODM_OPEN:
case MODM_CLOSE:
case MODM_GETVOLUME:
FIXME("Shouldn't be used: the corresponding 16 bit functions use the 32 bit interface\n");
break;
@ -475,7 +524,26 @@ static MMDRV_MapType MMDRV_MidiOut_UnMap16To32A(UINT wMsg, LPDWORD lpdwUser, LPD
case MODM_PREPARE:
case MODM_UNPREPARE:
case MODM_LONGDATA:
case MODM_GETVOLUME:
{
LPMIDIHDR mh32 = (LPMIDIHDR)(*lpParam1);
LPMIDIHDR mh16 = PTR_SEG_TO_LIN(*(LPMIDIHDR*)((LPSTR)mh32 - sizeof(LPMIDIHDR)));
assert(mh16->lpNext == mh32);
mh16->dwBufferLength = mh32->dwBufferLength;
mh16->dwBytesRecorded = mh32->dwBytesRecorded;
mh16->dwUser = mh32->dwUser;
mh16->dwFlags = mh32->dwFlags;
if (mh16->reserved >= sizeof(MIDIHDR))
mh16->dwOffset = mh32->dwOffset;
if (wMsg == MODM_UNPREPARE) {
HeapFree(GetProcessHeap(), 0, (LPSTR)mh32 - sizeof(LPMIDIHDR));
mh16->lpNext = 0;
}
ret = MMDRV_MAP_OK;
}
break;
case MODM_CACHEPATCHES:
case MODM_CACHEDRUMPATCHES:
default:
@ -515,10 +583,105 @@ static MMDRV_MapType MMDRV_MidiOut_Map32ATo16 (UINT wMsg, LPDWORD lpdwUser, LPD
*lpParam2 = sizeof(MIDIOUTCAPS16);
}
break;
case MODM_OPEN:
case MODM_PREPARE:
{
LPMIDIHDR mh32 = (LPMIDIHDR)*lpParam1;
LPMIDIHDR mh16;
LPVOID ptr = SEGPTR_ALLOC(sizeof(LPMIDIHDR) + sizeof(MIDIHDR) + mh32->dwBufferLength);
if (ptr) {
*(LPMIDIHDR*)ptr = mh32;
mh16 = (LPMIDIHDR)((LPSTR)ptr + sizeof(LPMIDIHDR));
mh16->lpData = (LPSTR)SEGPTR_GET(ptr) + sizeof(LPMIDIHDR) + sizeof(MIDIHDR);
/* data will be copied on WODM_WRITE */
mh16->dwBufferLength = mh32->dwBufferLength;
mh16->dwBytesRecorded = mh32->dwBytesRecorded;
mh16->dwUser = mh32->dwUser;
mh16->dwFlags = mh32->dwFlags;
/* FIXME: nothing on mh32->lpNext */
/* could link the mh32->lpNext at this level for memory house keeping */
mh16->dwOffset = (*lpParam2 >= sizeof(MIDIHDR)) ? mh32->dwOffset : 0;
mh32->lpNext = (LPMIDIHDR)mh16; /* for reuse in unprepare and write */
mh32->reserved = *lpParam2;
TRACE("mh16=%08lx mh16->lpData=%08lx mh32->buflen=%lu mh32->lpData=%08lx\n",
(DWORD)SEGPTR_GET(ptr) + sizeof(LPMIDIHDR), (DWORD)mh16->lpData,
mh32->dwBufferLength, (DWORD)mh32->lpData);
*lpParam1 = (DWORD)SEGPTR_GET(ptr) + sizeof(LPMIDIHDR);
*lpParam2 = sizeof(MIDIHDR);
ret = MMDRV_MAP_OKMEM;
} else {
ret = MMDRV_MAP_NOMEM;
}
}
break;
case MODM_UNPREPARE:
case MODM_LONGDATA:
{
LPMIDIHDR mh32 = (LPMIDIHDR)(*lpParam1);
LPMIDIHDR mh16 = (LPMIDIHDR)mh32->lpNext;
LPSTR ptr = (LPSTR)mh16 - sizeof(LPMIDIHDR);
assert(*(LPMIDIHDR*)ptr == mh32);
TRACE("mh16=%08lx mh16->lpData=%08lx mh32->buflen=%lu mh32->lpData=%08lx\n",
(DWORD)SEGPTR_GET(ptr) + sizeof(LPMIDIHDR), (DWORD)mh16->lpData,
mh32->dwBufferLength, (DWORD)mh32->lpData);
if (wMsg == MODM_LONGDATA)
memcpy((LPSTR)mh16 + sizeof(MIDIHDR), mh32->lpData, mh32->dwBufferLength);
*lpParam1 = (DWORD)SEGPTR_GET(ptr) + sizeof(LPMIDIHDR);
*lpParam2 = sizeof(MIDIHDR);
/* dwBufferLength can be reduced between prepare & write */
if (mh16->dwBufferLength < mh32->dwBufferLength) {
ERR("Size of buffer has been increased (%ld, %ld)\n",
mh16->dwBufferLength, mh32->dwBufferLength);
return MMDRV_MAP_MSGERROR;
}
mh16->dwBufferLength = mh32->dwBufferLength;
ret = MMDRV_MAP_OKMEM;
}
break;
case MODM_OPEN:
{
LPMIDIOPENDESC mod32 = (LPMIDIOPENDESC)*lpParam1;
LPVOID ptr;
LPMIDIOPENDESC16 mod16;
/* allocated data are mapped as follows:
LPMIDIOPENDESC ptr to orig lParam1
DWORD orig dwUser, which is a pointer to DWORD:driver dwInstance
DWORD dwUser passed to driver
MIDIOPENDESC16 mod16: openDesc passed to driver
MIDIOPENSTRMID cIds
*/
ptr = SEGPTR_ALLOC(sizeof(LPMIDIOPENDESC) + 2*sizeof(DWORD) + sizeof(MIDIOPENDESC16) +
mod32->cIds ? (mod32->cIds - 1) * sizeof(MIDIOPENSTRMID) : 0);
if (ptr) {
*(LPMIDIOPENDESC*)ptr = mod32;
*(LPDWORD)(ptr + sizeof(LPMIDIOPENDESC)) = *lpdwUser;
mod16 = (LPMIDIOPENDESC16)((LPSTR)ptr + sizeof(LPMIDIOPENDESC) + 2*sizeof(DWORD));
mod16->hMidi = mod32->hMidi;
mod16->dwCallback = mod32->dwCallback;
mod16->dwInstance = mod32->dwInstance;
mod16->dnDevNode = mod32->dnDevNode;
mod16->cIds = mod32->cIds;
memcpy(&mod16->rgIds, &mod32->rgIds, mod32->cIds * sizeof(MIDIOPENSTRMID));
*lpParam1 = (DWORD)SEGPTR_GET(ptr) + sizeof(LPMIDIOPENDESC) + 2*sizeof(DWORD);
*lpdwUser = (DWORD)SEGPTR_GET(ptr) + sizeof(LPMIDIOPENDESC) + sizeof(DWORD);
ret = MMDRV_MAP_OKMEM;
} else {
ret = MMDRV_MAP_NOMEM;
}
}
break;
case MODM_GETVOLUME:
case MODM_CACHEPATCHES:
case MODM_CACHEDRUMPATCHES:
@ -565,10 +728,40 @@ static MMDRV_MapType MMDRV_MidiOut_UnMap32ATo16(UINT wMsg, LPDWORD lpdwUser, LPD
ret = MMDRV_MAP_OK;
}
break;
case MODM_OPEN:
case MODM_PREPARE:
case MODM_UNPREPARE:
case MODM_LONGDATA:
{
LPMIDIHDR mh16 = (LPMIDIHDR)PTR_SEG_TO_LIN(*lpParam1);
LPSTR ptr = (LPSTR)mh16 - sizeof(LPMIDIHDR);
LPMIDIHDR mh32 = *(LPMIDIHDR*)ptr;
assert(mh32->lpNext == (LPMIDIHDR)mh16);
mh32->dwBytesRecorded = mh16->dwBytesRecorded;
mh32->dwUser = mh16->dwUser;
mh32->dwFlags = mh16->dwFlags;
if (wMsg == MODM_UNPREPARE) {
if (!SEGPTR_FREE(ptr))
FIXME("bad free line=%d\n", __LINE__);
mh32->lpNext = 0;
}
ret = MMDRV_MAP_OK;
}
break;
case MODM_OPEN:
{
LPMIDIOPENDESC16 mod16 = (LPMIDIOPENDESC16)PTR_SEG_TO_LIN(*lpParam1);
LPSTR ptr = (LPSTR)mod16 - sizeof(LPMIDIOPENDESC) - 2*sizeof(DWORD);
**(DWORD**)(ptr + sizeof(LPMIDIOPENDESC)) = *(LPDWORD)(ptr + sizeof(LPMIDIOPENDESC) + sizeof(DWORD));
if (!SEGPTR_FREE(ptr))
FIXME("bad free line=%d\n", __LINE__);
ret = MMDRV_MAP_OK;
}
break;
case MODM_GETVOLUME:
case MODM_CACHEPATCHES:
case MODM_CACHEDRUMPATCHES:
@ -594,19 +787,24 @@ static void CALLBACK MMDRV_MidiOut_Callback(HDRVR hDev, UINT uMsg, DWORD dwInsta
case MOM_DONE:
if (mld->bFrom32 && !MMDrvs[mld->mmdIndex].bIs32) {
/* initial map is: 32 => 16 */
LPMIDIHDR wh16 = (LPMIDIHDR)PTR_SEG_TO_LIN(dwParam1);
LPMIDIHDR wh32 = *(LPMIDIHDR*)((LPSTR)wh16 - sizeof(LPMIDIHDR));
LPMIDIHDR mh16 = (LPMIDIHDR)PTR_SEG_TO_LIN(dwParam1);
LPMIDIHDR mh32 = *(LPMIDIHDR*)((LPSTR)mh16 - sizeof(LPMIDIHDR));
dwParam1 = (DWORD)wh32;
wh32->dwFlags = wh16->dwFlags;
dwParam1 = (DWORD)mh32;
mh32->dwFlags = mh16->dwFlags;
mh32->dwOffset = mh16->dwOffset;
if (mh32->reserved >= sizeof(MIDIHDR))
mh32->dwOffset = mh16->dwOffset;
} else if (!mld->bFrom32 && MMDrvs[mld->mmdIndex].bIs32) {
/* initial map is: 16 => 32 */
LPMIDIHDR wh32 = (LPMIDIHDR)(dwParam1);
LPMIDIHDR segwh16 = *(LPMIDIHDR*)((LPSTR)wh32 - sizeof(LPMIDIHDR));
LPMIDIHDR wh16 = PTR_SEG_TO_LIN(segwh16);
LPMIDIHDR mh32 = (LPMIDIHDR)(dwParam1);
LPMIDIHDR segmh16 = *(LPMIDIHDR*)((LPSTR)mh32 - sizeof(LPMIDIHDR));
LPMIDIHDR mh16 = PTR_SEG_TO_LIN(segmh16);
dwParam1 = (DWORD)segwh16;
wh16->dwFlags = wh32->dwFlags;
dwParam1 = (DWORD)segmh16;
mh16->dwFlags = mh32->dwFlags;
if (mh16->reserved >= sizeof(MIDIHDR))
mh16->dwOffset = mh32->dwOffset;
}
/* else { 16 => 16 or 32 => 32, nothing to do, same struct is kept }*/
break;
@ -710,6 +908,13 @@ static MMDRV_MapType MMDRV_WaveIn_Map16To32A (UINT wMsg, LPDWORD lpdwUser, LPDW
*lpParam1 = (DWORD)wh32;
*lpParam2 = sizeof(WAVEHDR);
/* dwBufferLength can be reduced between prepare & write */
if (wh32->dwBufferLength < wh16->dwBufferLength) {
ERR("Size of buffer has been increased (%ld, %ld)\n",
wh32->dwBufferLength, wh16->dwBufferLength);
return MMDRV_MAP_MSGERROR;
}
wh32->dwBufferLength = wh16->dwBufferLength;
ret = MMDRV_MAP_OKMEM;
}
break;
@ -817,7 +1022,7 @@ static MMDRV_MapType MMDRV_WaveIn_Map32ATo16 (UINT wMsg, LPDWORD lpdwUser, LPDW
/* allocated data are mapped as follows:
LPWAVEOPENDESC ptr to orig lParam1
DWORD ptr to orig dwUser, which is a pointer to DWORD:driver dwInstance
DWORD orig dwUser, which is a pointer to DWORD:driver dwInstance
DWORD dwUser passed to driver
WAVEOPENDESC16 wod16: openDesc passed to driver
WAVEFORMATEX openDesc->lpFormat passed to driver
@ -897,11 +1102,18 @@ static MMDRV_MapType MMDRV_WaveIn_Map32ATo16 (UINT wMsg, LPDWORD lpdwUser, LPDW
(DWORD)SEGPTR_GET(ptr) + sizeof(LPWAVEHDR), (DWORD)wh16->lpData,
wh32->dwBufferLength, (DWORD)wh32->lpData);
if (wMsg == WODM_WRITE)
if (wMsg == WIDM_ADDBUFFER)
memcpy((LPSTR)wh16 + sizeof(WAVEHDR), wh32->lpData, wh32->dwBufferLength);
*lpParam1 = (DWORD)SEGPTR_GET(ptr) + sizeof(LPWAVEHDR);
*lpParam2 = sizeof(WAVEHDR);
/* dwBufferLength can be reduced between prepare & write */
if (wh32->dwBufferLength < wh16->dwBufferLength) {
ERR("Size of buffer has been increased (%ld, %ld)\n",
wh32->dwBufferLength, wh16->dwBufferLength);
return MMDRV_MAP_MSGERROR;
}
wh32->dwBufferLength = wh16->dwBufferLength;
ret = MMDRV_MAP_OKMEM;
}
break;
@ -990,7 +1202,7 @@ static MMDRV_MapType MMDRV_WaveIn_UnMap32ATo16(UINT wMsg, LPDWORD lpdwUser, LPDW
wh32->dwFlags = wh16->dwFlags;
wh32->dwLoops = wh16->dwLoops;
if (wMsg == WODM_UNPREPARE) {
if (wMsg == WIDM_UNPREPARE) {
if (!SEGPTR_FREE(ptr))
FIXME("bad free line=%d\n", __LINE__);
wh32->lpNext = 0;
@ -1178,6 +1390,13 @@ static MMDRV_MapType MMDRV_WaveOut_Map16To32A (UINT wMsg, LPDWORD lpdwUser, LPD
*lpParam1 = (DWORD)wh32;
*lpParam2 = sizeof(WAVEHDR);
/* dwBufferLength can be reduced between prepare & write */
if (wh32->dwBufferLength < wh16->dwBufferLength) {
ERR("Size of buffer has been increased (%ld, %ld)\n",
wh32->dwBufferLength, wh16->dwBufferLength);
return MMDRV_MAP_MSGERROR;
}
wh32->dwBufferLength = wh16->dwBufferLength;
ret = MMDRV_MAP_OKMEM;
}
break;
@ -1344,7 +1563,7 @@ static MMDRV_MapType MMDRV_WaveOut_Map32ATo16 (UINT wMsg, LPDWORD lpdwUser, LPD
/* allocated data are mapped as follows:
LPWAVEOPENDESC ptr to orig lParam1
DWORD ptr to orig dwUser, which is a pointer to DWORD:driver dwInstance
DWORD orig dwUser, which is a pointer to DWORD:driver dwInstance
DWORD dwUser passed to driver
WAVEOPENDESC16 wod16: openDesc passed to driver
WAVEFORMATEX openDesc->lpFormat passed to driver
@ -1429,6 +1648,13 @@ static MMDRV_MapType MMDRV_WaveOut_Map32ATo16 (UINT wMsg, LPDWORD lpdwUser, LPD
*lpParam1 = (DWORD)SEGPTR_GET(ptr) + sizeof(LPWAVEHDR);
*lpParam2 = sizeof(WAVEHDR);
/* dwBufferLength can be reduced between prepare & write */
if (wh16->dwBufferLength < wh32->dwBufferLength) {
ERR("Size of buffer has been increased (%ld, %ld)\n",
wh16->dwBufferLength, wh32->dwBufferLength);
return MMDRV_MAP_MSGERROR;
}
wh16->dwBufferLength = wh32->dwBufferLength;
ret = MMDRV_MAP_OKMEM;
}
break;
@ -1786,7 +2012,7 @@ DWORD MMDRV_Open(LPWINE_MLD mld, UINT wMsg, DWORD dwParam1, DWORD dwFlags)
mld->dwDriverInstance = (DWORD)&dwInstance;
if (mld->uDeviceID == (UINT)-1) {
if (mld->uDeviceID == (UINT)-1 || mld->uDeviceID == (UINT16)-1) {
TRACE("MAPPER mode requested !\n");
/* check if mapper is supported by type */
if (llType->bSupportMapper) {

3
dlls/winmm/mmsystem.c
View File

@ -2202,14 +2202,13 @@ UINT16 WINAPI midiOutPrepareHeader16(HMIDIOUT16 hMidiOut,
UINT16 uSize)
{
LPWINE_MLD wmld;
LPMIDIHDR16 lpMidiOutHdr = PTR_SEG_TO_LIN(lpsegMidiOutHdr);
TRACE("(%04X, %p, %d)\n", hMidiOut, lpsegMidiOutHdr, uSize);
if ((wmld = MMDRV_Get(hMidiOut, MMDRV_MIDIOUT, FALSE)) == NULL)
return MMSYSERR_INVALHANDLE;
return MMDRV_Message(wmld, MODM_PREPARE, (DWORD)lpMidiOutHdr, uSize, FALSE);
return MMDRV_Message(wmld, MODM_PREPARE, (DWORD)lpsegMidiOutHdr, uSize, FALSE);
}
/**************************************************************************

6
include/mmsystem.h
View File

@ -561,20 +561,20 @@ typedef struct {
DECL_WINELIB_TYPE_AW(MIDIINCAPS)
DECL_WINELIB_TYPE_AW(LPMIDIINCAPS)
typedef struct {
typedef struct midihdr16_tag {
LPSTR lpData; /* pointer to locked data block */
DWORD dwBufferLength; /* length of data in data block */
DWORD dwBytesRecorded;/* used for input only */
DWORD dwUser; /* for client's use */
DWORD dwFlags; /* assorted flags (see defines) */
struct midihdr_tag *lpNext; /* reserved for driver */
struct midihdr16_tag *lpNext; /* reserved for driver */
DWORD reserved; /* reserved for driver */
} MIDIHDR16, *LPMIDIHDR16;
/* It seems that Win32 has a slightly different structure than Win 16.
* sigh....
*/
typedef struct {
typedef struct midihdr_tag {
LPSTR lpData; /* pointer to locked data block */
DWORD dwBufferLength; /* length of data in data block */
DWORD dwBytesRecorded;/* used for input only */