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windows-nt-4.0/private/windows/media/winmm/midistrm.c

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/*******************************************************************************
*
* Module Name: midistrm.c
*
* MIDI Streams implementation
*
* Created: 9 Feb 1995 SteveDav
*
* Copyright (c) 1995 Microsoft Corporation. All rights reserved
*
\******************************************************************************/
#include "winmmi.h"
/*
* MIDI Streaming API Port: For the time being, the assumption
* is that the devices are static. This code was designed to
* be PnP friendly, with devices coming and going. The
* validation of devices will be commented out for now, but in
* the future when NT is a more dynamic OS, the validation will
* need to be added back.
*
*/
extern BOOL CreatehwndNotify(VOID);
CRITICAL_SECTION midiStrmHdrCritSec;
WINMMAPI MMRESULT WINAPI midiDisconnect (
HMIDI hmi,
HMIDIOUT hmo,
LPVOID lpv)
{
dprintf2(("midiDisconnect(%08X,%08X,%08X)", hmi, hmo, lpv));
return midiInSetThru (hmi, hmo, FALSE);
}
WINMMAPI MMRESULT WINAPI midiConnect (
HMIDI hmi,
HMIDIOUT hmo,
LPVOID lpv)
{
dprintf2(("midiConnect(%08X,%08X,%08X)", hmi, hmo, lpv));
return midiInSetThru (hmi, hmo, TRUE);
}
/*+ midiInSetThru
*
* Establish a thruing midiOut handle for a midiIn device. This is
* done by first calling the driver to let the driver do the thruing,
* if the driver returns UNSUPPORTED a single thruing handle can
* be established by simulation in DriverCallback
*
*-====================================================================*/
MMRESULT midiInSetThru (
HMIDI hmi,
HMIDIOUT hmo,
BOOL bAdd)
{
MMRESULT mmr = MMSYSERR_ERROR; // this value should never get returned....
UINT uType;
dprintf2(("midiInSetThru(%X,%X,%d)", hmi, hmo, bAdd));
// allow first handle to be either midi in or midi out
// (so that we can send DRVM_ADD_THRU messages to dummy
// output drivers.)
//
// we simulate thruing only for input handles though...
//
if (BAD_HANDLE(hmi, TYPE_MIDIIN) && BAD_HANDLE(hmi, TYPE_MIDIOUT))
return MMSYSERR_INVALHANDLE;
uType = GetHandleType(hmi);
if (bAdd)
{
V_HANDLE(hmo, TYPE_MIDIOUT, MMSYSERR_INVALHANDLE);
// !!! Devices are static on NT for now.
//
//if (!mregQueryValidHandle(HtoPT(PMIDIDEV, hmo)->hmd))
// return MMSYSERR_NODRIVER;
mmr = (MMRESULT)midiMessage ((HMIDI)hmi, DRVM_ADD_THRU, (DWORD)(UINT)hmo, 0l);
if (mmr == MMSYSERR_NOTSUPPORTED && uType == TYPE_MIDIIN)
{
// dont allow more than one handle to be added
//
if (HtoPT(PMIDIDEV, hmi)->pmThru)
mmr = MIDIERR_NOTREADY;
else
{
// add the handle.
//
HtoPT(PMIDIDEV, hmi)->pmThru = HtoPT(PMIDIDEV, hmo);
mmr = MMSYSERR_NOERROR;
}
}
}
else
{
mmr = (MMRESULT)midiMessage ((HMIDI)hmi, DRVM_REMOVE_THRU, (DWORD)(UINT)hmo, 0l);
if (mmr == MMSYSERR_NOTSUPPORTED && uType == TYPE_MIDIIN)
mmr = MMSYSERR_NOERROR;
if ( ! hmo || (PMIDIDEV)hmo == HtoPT(PMIDIDEV, hmi)->pmThru)
HtoPT(PMIDIDEV, hmi)->pmThru = NULL;
else
mmr = MMSYSERR_INVALPARAM;
}
return mmr;
}
WINMMAPI MMRESULT WINAPI midiStreamOpen(
LPHMIDISTRM phms,
LPUINT puDeviceID,
DWORD cMidi,
DWORD dwCallback,
DWORD dwInstance,
DWORD fdwOpen)
{
PMIDISTRM pms = NULL;
PMIDISTRMID pmsi;
PMIDISTRMID pmsiSave;
MIDIOPENDESC* pmod = NULL;
DWORD cbHandle;
DWORD idx;
MIDIOUTCAPS moc;
MMRESULT mmrc = MMSYSERR_NOERROR;
MMRESULT mmrc2;
UINT msg;
V_WPOINTER((LPVOID)phms, sizeof(HMIDISTRM), MMSYSERR_INVALPARAM);
V_DCALLBACK(dwCallback, HIWORD(fdwOpen), MMSYSERR_INVALPARAM);
*phms = NULL;
// Allocate both the handle and the OPENDESC structure.
//
// NOTE: Using cMidi-1 because rgIds is defined as having 1 element
//
cbHandle = sizeof(MIDISTRM) + cMidi * ELESIZE(MIDISTRM, rgIds[0]);
if ((0 == cMidi) || (cbHandle >= 0x00010000L))
return MMSYSERR_INVALPARAM;
pms = HtoPT(PMIDISTRM, NewHandle(TYPE_MIDISTRM, (UINT)cbHandle));
if (NULL == pms)
{
dprintf1(("mSO: NewHandle() failed!"));
return MMSYSERR_NOMEM;
}
pmod = (MIDIOPENDESC*)LocalAlloc(LPTR,
(UINT)(sizeof(MIDIOPENDESC) + (cMidi-1) * ELESIZE(MIDIOPENDESC, rgIds[0])));
if (NULL == pmod)
{
dprintf1(("mSO: !LocalAlloc(MIDIOPENDESC)"));
mmrc = MMSYSERR_NOMEM;
goto midiStreamOpen_Cleanup;
}
pms->fdwOpen = fdwOpen;
pms->dwCallback = dwCallback;
pms->dwInstance = dwInstance;
pms->cIds = cMidi;
// Scan through the given device ID's. Determine if the underlying
// driver supports stream directly. If so, then get it's HMD and uDeviceID,
// etc. Else flag this as an emulator ID.
//
pmsi = pms->rgIds;
for (idx = 0; idx < cMidi; idx++, pmsi++)
{
dprintf1(("mSO: pmsi->fdwId %08lX", (DWORD)pmsi->fdwId));
mmrc = midiOutGetDevCaps(puDeviceID[idx], &moc, sizeof(moc));
if (MMSYSERR_NOERROR != mmrc)
{
puDeviceID[idx] = (UINT)MIDISTRM_ERROR;
goto midiStreamOpen_Cleanup;
}
if (moc.dwSupport & MIDICAPS_STREAM)
{
dprintf1(("mSO: Dev %u MIDICAPS_STREAM! dwSupport %08lX", (UINT)idx, moc.dwSupport));
mmrc = mregFindDevice(puDeviceID[idx], TYPE_MIDIOUT, &pmsi->hmd, &pmsi->uDevice);
if (MMSYSERR_NOERROR != mmrc)
{
dprintf(("mregFindDevice barfed %u", (UINT)mmrc));
puDeviceID[idx] = (UINT)MIDISTRM_ERROR;
goto midiStreamOpen_Cleanup;
}
else
{
dprintf1(("mregFindDevice: hmd %04X", (UINT)pmsi->hmd));
}
}
else
{
dprintf1(("mSO: Dev %u emulated.", (UINT)idx));
pmsi->fdwId |= MSI_F_EMULATOR;
pmsi->hmd = NULL;
pmsi->uDevice = puDeviceID[idx];
}
}
// Scan through the list again, but this time actually open the devices.
//
pmod->hMidi = PTtoH(HMIDI, pms);
pmod->dwCallback = (DWORD)midiOutStreamCallback;
pmod->dwInstance = 0;
msg = MODM_OPEN;
pms->cDrvrs = 0;
for(;;)
{
pmsiSave = NULL;
pmsi = pms->rgIds;
for (idx = 0; idx < cMidi; idx++, pmsi++)
{
if (!(pmsi->fdwId & MSI_F_OPENED))
{
pmsiSave = pmsi;
break;
}
}
if (NULL == pmsiSave)
break;
pmod->cIds = 0;
for(; idx < cMidi; idx++, pmsi++)
if (pmsi->hmd == pmsiSave->hmd)
{
pmod->rgIds[pmod->cIds].uDeviceID = pmsi->uDevice;
pmod->rgIds[pmod->cIds++].dwStreamID = idx;
}
pmsiSave->fdwId |= MSI_F_FIRST;
if (!(pmsiSave->fdwId & MSI_F_EMULATOR))
{
pmsiSave->drvMessage = HtoPT(PMMDRV, pmsiSave->hmd)->drvMessage;
// pmsiSave->dnDevNode = pmod->dnDevNode = mregQueryDevNode(pmsiSave->hmd);
mmrc = (MMRESULT)((*pmsiSave->drvMessage)(
0,
msg,
(DWORD)(LPDWORD)&pmsiSave->dwDrvUser,
(DWORD)(LPMIDIOPENDESC)pmod,
CALLBACK_FUNCTION|MIDI_IO_COOKED));
if (MMSYSERR_NOERROR == mmrc)
{
mregIncUsage(pmsiSave->hmd);
}
}
else
{
mmrc = (MMRESULT)mseMessage(msg,
(DWORD)(LPDWORD)&pmsiSave->dwDrvUser,
(DWORD)(LPMIDIOPENDESC)pmod,
CALLBACK_FUNCTION);
}
if (MMSYSERR_NOERROR != mmrc)
{
idx = (DWORD)(pmsiSave - pms->rgIds);
puDeviceID[idx] = (UINT)MIDISTRM_ERROR;
goto midiStreamOpen_Cleanup;
}
++pms->cDrvrs;
pmsi = pms->rgIds;
for (idx = 0; idx < cMidi; idx++, pmsi++)
if (pmsi->hmd == pmsiSave->hmd)
{
pmsi->fdwId |= MSI_F_OPENED;
if (!(pmsiSave->fdwId & MSI_F_EMULATOR))
InitializeCriticalSection(&pmsi->CritSec);
}
}
if (!CreatehwndNotify())
{
dprintf(("Cannot create hwndNotify for async messages!"));
mmrc = MMSYSERR_ERROR;
}
dprintf2(("midiStreamOpen: HMIDISTRM %04X", (WORD)pms));
midiStreamOpen_Cleanup:
if (NULL != pmod) LocalFree((HLOCAL)pmod);
if (MMSYSERR_NOERROR != mmrc)
{
if (NULL != pms)
{
msg = MODM_CLOSE;
pmsi = pms->rgIds;
for (idx = 0; idx < pms->cIds; idx++, pmsi++)
{
if ((pmsi->fdwId & (MSI_F_OPENED|MSI_F_FIRST)) == (MSI_F_OPENED|MSI_F_FIRST))
{
mmrc2 = (MMRESULT)midiStreamMessage(pmsi, msg, 0L, 0L);
if (MMSYSERR_NOERROR == mmrc2 &&
!(pmsi->fdwId & MSI_F_EMULATOR))
{
DeleteCriticalSection(&pmsi->CritSec);
mregDecUsage(pmsi->hmd);
}
else
{
dprintf1(("midiStreamOpen_Cleanup: Close returned %u", mmrc2));
}
}
}
FreeHandle((PTtoH(HMIDI, pms)));
}
}
else
{
*phms = PTtoH(HMIDISTRM, pms);
msg = MM_MOM_OPEN;
DriverCallback(pms->dwCallback,
HIWORD(pms->fdwOpen),
(HDRVR)PTtoH(HMIDISTRM, pms),
msg,
pms->dwInstance,
0,
0);
}
return mmrc;
}
WINMMAPI MMRESULT WINAPI midiStreamClose(
HMIDISTRM hms)
{
PMIDISTRM pms;
PMIDISTRMID pmsi;
DWORD idx;
MMRESULT mmrc;
V_HANDLE(hms, TYPE_MIDISTRM, MMSYSERR_INVALHANDLE);
dprintf1(("midiStreamClose(%04X)", (WORD)hms));
pms = HtoPT(PMIDISTRM, hms);
pmsi = pms->rgIds;
for (idx = 0; idx < pms->cIds; idx++, pmsi++)
{
if ((pmsi->fdwId & (MSI_F_OPENED|MSI_F_FIRST)) == (MSI_F_OPENED|MSI_F_FIRST))
{
mmrc = (MMRESULT)midiStreamMessage(pmsi, MODM_CLOSE, 0L, 0L);
if (MMSYSERR_NOERROR == mmrc &&
!(pmsi->fdwId & MSI_F_EMULATOR))
{
DeleteCriticalSection(&pmsi->CritSec);
mregDecUsage(pmsi->hmd);
}
else
{
dprintf1(("midiStreamClose: Close returned %u", mmrc));
}
}
}
dprintf1(("DriverCallback(%04X)", (WORD)hms));
DriverCallback(pms->dwCallback,
HIWORD(pms->fdwOpen),
(HDRVR)hms,
MM_MOM_CLOSE,
pms->dwInstance,
0,
0);
dprintf1(("FreeHandle(%04X)", (WORD)hms));
FreeHandle(hms);
return MMSYSERR_NOERROR;
}
/****************************************************************************
* @doc EXTERNAL MIDI M5
*
* @func MMRESULT | midiStreamProperty | Sets or retrieves properties
* of a MIDI data stream associated with a MIDI input or output device.
*
* @parm HMIDI | hm | Specifies the handle of the MIDI device that the
* property is associated with.
*
* @parm LPBYTE | lppropdata | Specifies a pointer to the property data.
*
* @parm DWORD | dwProperty | Contains flags that specify the action
* to perform and identify the appropriate property of the MIDI data stream.
* <f midiStreamProperty> requires setting two flags in each use. One flag
* (either MIDIPROP_GET or MIDIPROP_SET) specifies an action. The other
* identifies a specific property to examine or edit.
*
* @flag MIDIPROP_SET | Set the given property.
* @flag MIDIPROP_GET | Retrieve the current setting of the given property.
* @flag MIDIPROP_TIMEDIV | Time division property.
* This property is valid for both input and output devices. <p lppropdata>
* points to a <t MIDIPROPTIMEDIV> structure. This property can be set only
* when the device is stopped.
*
* @flag MIDIPROP_TEMPO | Tempo property.
* This property is valid for both input and output devices. <p lppropdata>
* points to a <t MIDIPROPTEMPO> structure. The current tempo value can be
* retrieved at any time. This function can set the tempo for input devices.
* Output devices set the tempo by inserting PMSG_TEMPO events into the
* MIDI data.
*
* @flag MIDIPROP_CBTIMEOUT | Timeout value property.
* This property specifies the timeout value for loading buffers when a
* MIDI device is in MIDI_IO_COOKED and MIDI_IO_RAW modes. The current
* timeout value sets the maximum number of milliseconds that a buffer will
* be held once any data is placed in it. If this timeout expires, the
* buffer will be returned to the application even though it might not be
* completely full. <p lppropdata> points to a <t MIDIPROPCBTIMEOUT> structure.
*
* @comm These properties are the default properties defined by MMSYSTEM.
* Driver writers may implement and document their own properties.
*
* @rdesc The return value is one of the following values:
* @flag MMSYSERR_INVALPARAM | The given handle or flags are invalid.
* @flag MIDIERR_BADOPENMODE | The given handle is not open in MIDI_IO_COOKED
* or MIDI_IO_RAW mode.
*
***************************************************************************/
MMRESULT WINAPI midiStreamProperty(
HMIDISTRM hms,
LPBYTE lppropdata,
DWORD dwProperty)
{
MMRESULT mmrc;
V_HANDLE(hms, TYPE_MIDISTRM, MMSYSERR_INVALHANDLE);
if ((!(dwProperty&MIDIPROP_SET)) && (!(dwProperty&MIDIPROP_GET)))
return MMSYSERR_INVALPARAM;
V_RPOINTER(lppropdata, sizeof(DWORD), MMSYSERR_INVALPARAM);
if (dwProperty&MIDIPROP_SET)
{
V_RPOINTER(lppropdata, (UINT)(*(LPDWORD)(lppropdata)), MMSYSERR_INVALPARAM);
}
else
{
V_WPOINTER(lppropdata, (UINT)(*(LPDWORD)(lppropdata)), MMSYSERR_INVALPARAM);
}
mmrc = (MMRESULT)midiStreamBroadcast(HtoPT(PMIDISTRM, hms),
MODM_PROPERTIES,
(DWORD)lppropdata,
dwProperty);
return mmrc;
}
/*****************************************************************************
* @doc EXTERNAL MIDI
*
* @api MMRESULT | midiOutGetPosition | Retrieves the current
* playback position of the specified MIDI output device.
*
* @parm HMIDIOUT | hmo | Specifies a handle to the MIDI output device.
*
* @parm LPMMTIME | pmmt | Specifies a far pointer to an <t MMTIME>
* structure.
*
* @parm UINT | cbmmt | Specifies the size of the <t MMTIME> structure.
*
* @rdesc Returns zero if the function is successful. Otherwise, it returns
* an error number. Possible error values are:
* @flag MMSYSERR_INVALHANDLE | Specified device handle is invalid.
*
* @comm Before calling <f midiOutGetPosition>, set the <e MMTIME.wType> field
* of <t MMTIME> to indicate the time format that you desire. After
* calling <f midiOutGetPosition>, check the <e MMTIME.wType> field
* to determine if the desired time format is supported. If the desired
* format is not supported, <e MMTIME.wType> will specify an alternative
* format.
*
* The position is set to zero when the device is opened, reset, or
* stopped.
****************************************************************************/
MMRESULT WINAPI midiStreamPosition(
HMIDISTRM hms,
LPMMTIME pmmt,
UINT cbmmt)
{
MMRESULT mmrc;
V_HANDLE(hms, TYPE_MIDISTRM, MMSYSERR_INVALHANDLE);
V_WPOINTER(pmmt, cbmmt, MMSYSERR_INVALPARAM);
mmrc = (MMRESULT)midiStreamMessage(HtoPT(PMIDISTRM, hms)->rgIds,
MODM_GETPOS,
(DWORD)pmmt,
(DWORD)cbmmt);
return mmrc;
}
/*****************************************************************************
* @doc EXTERNAL MIDI
*
* @api MMRESULT | midiStreamStop | Turns off all notes on all MIDI
* channels for the specified MIDI output device. Any pending
* system-exclusive or polymessage output buffers are marked as done and
* returned to the application. While <f midiOutReset> turns off all notes,
* <f midiStreamStop> turns off only those notes that have been turned on
* by a MIDI note-on message.
*
* @parm HMIDIOUT | hMidiOut | Specifies a handle to the MIDI output
* device.
*
* @rdesc Returns zero if the function is successful. Otherwise, it returns
* an error number. Possible error values are:
* @flag MMSYSERR_INVALHANDLE | Specified device handle is invalid.
* @flag MIDIERR_BADOPENMODE | Specified device handle is not opened in
* MIDI_IO_COOKED mode.
*
* @comm To turn off all notes, a note-off message for each note for each
* channel is sent. In addition, the sustain controller is turned off for
* each channel.
*
* @xref midiOutLongMsg midiOutClose midiOutReset
****************************************************************************/
MMRESULT WINAPI midiStreamStop(HMIDISTRM hms)
{
PMIDISTRM pms;
MMRESULT mmrc;
V_HANDLE(hms, TYPE_MIDISTRM, MMSYSERR_INVALHANDLE);
pms = HtoPT(PMIDISTRM, hms);
mmrc = (MMRESULT)midiStreamBroadcast(pms, MODM_STOP, 0, 0);
return mmrc;
}
/*****************************************************************************
* @doc EXTERNAL MIDI
*
* @api MMRESULT | midiStreamPause | Pauses playback on a specified
* MIDI output device. The current playback position is saved. Use
* <f midiStreamRestart> to resume playback from the current playback position.
* This call is only valid for handles opened in MIDI_IO_COOKED mode.
*
* @parm HMIDIOUT | hmo | Specifies a handle to the MIDI output
* device.
*
* @rdesc Returns zero if the function is successful. Otherwise, it returns
* an error number. Possible error values are:
* @flag MMSYSERR_INVALHANDLE | Specified device handle is invalid.
* @flag MMSYSERR_INVALPARAM | Specified device was not opened with
* the MIDI_IO_COOKED flag.
*
* @comm Calling this function when the output is already paused has no
* effect, and the function returns zero.
*
* @xref midiStreamRestart
****************************************************************************/
MMRESULT WINAPI midiStreamPause(
HMIDISTRM hms)
{
MMRESULT mmrc;
V_HANDLE(hms, TYPE_MIDISTRM, MMSYSERR_INVALHANDLE);
mmrc = (MMRESULT)midiStreamBroadcast(HtoPT(PMIDISTRM, hms), MODM_PAUSE, 0, 0);
return mmrc;
}
/*****************************************************************************
* @doc EXTERNAL MIDI
*
* @api MMRESULT | midiStreamRestart | Restarts a paused MIDI
* output device.
*
* @parm HMIDIOUT | hmo | Specifies a handle to the MIDI output
* device.
*
* @rdesc Returns zero if the function is successful. Otherwise, it returns
* an error number. Possible error values are:
* @flag MMSYSERR_INVALHANDLE | Specified device handle is invalid.
* @flag MMSYSERR_INVALPARAM | Specified device was not opened with
* the MIDI_IO_COOKED flag.
*
* @comm Calling this function when the output is not paused has no
* effect, and the function returns zero.
*
* @xref midiOutPause
****************************************************************************/
MMRESULT WINAPI midiStreamRestart(
HMIDISTRM hms)
{
MMRESULT mmrc;
MMTIME mmt;
DWORD tkTime;
DWORD msTime;
PMIDISTRM pms;
PMIDISTRMID pmsi;
DWORD idx;
V_HANDLE(hms, TYPE_MIDISTRM, MMSYSERR_INVALHANDLE);
tkTime = 0;
pms = HtoPT(PMIDISTRM, hms);
for (idx = 0, pmsi = pms->rgIds; idx < pms->cIds; idx++, pmsi++)
if (pmsi->fdwId & MSI_F_FIRST)
{
mmt.wType = TIME_TICKS;
mmrc = (MMRESULT)midiStreamMessage(pmsi,
MODM_GETPOS,
(DWORD)&mmt,
sizeof(mmt));
if (mmrc)
{
dprintf(("midiOutRestart: Device %u returned %u", idx, mmrc));
return mmrc;
}
if (mmt.wType == TIME_TICKS)
{
if (mmt.u.ticks > tkTime)
tkTime = mmt.u.ticks;
}
else
{
dprintf(("midiOutRestart: Device %u does not support ticks", idx));
return MIDIERR_NOTREADY;
}
}
// Fudge time to allow device setup
//
msTime = timeGetTime();
dprintf(("midiOutRestart: Tick %lu timeGetTime %lu", tkTime, msTime));
mmrc = (MMRESULT)midiStreamBroadcast(pms,
MODM_RESTART,
msTime,
tkTime);
return mmrc;
}
MMRESULT WINAPI midiStreamOut(
HMIDISTRM hMidiStrm,
LPMIDIHDR lpMidiHdr,
UINT cbMidiHdr)
{
PMIDISTRMID pmsi;
PMIDISTRM pms;
UINT idx;
UINT cSent;
LPMIDIHDR lpmhWork;
BOOL fCallback;
MMRESULT mmrc;
BOOL fWasStopped;
dprintf2(( "midiStreamOut(%04X, %08lX, %08lX)", (WORD)hMidiStrm, (DWORD)lpMidiHdr, lpMidiHdr->dwBytesRecorded));
V_HANDLE(hMidiStrm, TYPE_MIDISTRM, MMSYSERR_INVALHANDLE);
V_HEADER(lpMidiHdr, cbMidiHdr, TYPE_MIDIOUT, MMSYSERR_INVALPARAM);
pms = HtoPT(PMIDISTRM, hMidiStrm);
for (pmsi = pms->rgIds, idx = 0; idx < pms->cIds; idx++, pmsi++)
if ( (!(pmsi->fdwId & MSI_F_EMULATOR)) && (!(pmsi->hmd)) )
return MMSYSERR_NODRIVER;
if (!(lpMidiHdr->dwFlags&MHDR_PREPARED))
{
dprintf1(( "midiOutPolyMsg: !MHDR_PREPARED"));
return MIDIERR_UNPREPARED;
}
if (lpMidiHdr->dwFlags&MHDR_INQUEUE)
{
dprintf1(( "midiOutPolyMsg: Still playing!"));
return MIDIERR_STILLPLAYING;
}
if (lpMidiHdr->dwBytesRecorded > lpMidiHdr->dwBufferLength ||
(lpMidiHdr->dwBytesRecorded & 3))
{
dprintf1(( "Bytes recorded too long or not DWORD aligned."));
return MMSYSERR_INVALPARAM;
}
//
// Polymsg buffers are limited to 64k in order that we (and the driver)
// not have to do huge pointer manipulation.
// Length must also be DWORD aligned.
//
if ((lpMidiHdr->dwBufferLength > 65535L) ||
(lpMidiHdr->dwBufferLength&3))
{
dprintf1(( "midiOutPolyMsg: Buffer > 64k or not DWORD aligned"));
return MMSYSERR_INVALPARAM;
}
EnterCriticalSection(&midiStrmHdrCritSec);
lpMidiHdr->lpNext = NULL;
fWasStopped = FALSE;
if (!pms->lpmhFront)
{
pms->lpmhFront = pms->lpmhRear = lpMidiHdr;
fWasStopped = TRUE;
}
else
{
pms->lpmhRear->lpNext = lpMidiHdr;
pms->lpmhRear = lpMidiHdr;
}
LeaveCriticalSection(&midiStrmHdrCritSec);
lpMidiHdr->lpNext = NULL;
lpMidiHdr->dwReserved[MH_REFCNT] = 0;
lpMidiHdr->dwFlags |= (MHDR_SENDING|MHDR_INQUEUE|MHDR_ISSTRM);
lpmhWork = (LPMIDIHDR)lpMidiHdr->dwReserved[MH_SHADOW];
pmsi = pms->rgIds;
for (idx = 0, cSent = 0; idx < pms->cIds; idx++, pmsi++)
{
if (pmsi->fdwId & MSI_F_FIRST)
{
lpmhWork->dwBytesRecorded = lpMidiHdr->dwBytesRecorded;
lpmhWork->dwFlags |= MHDR_ISSTRM;
mmrc = (MMRESULT)midiStreamMessage(pmsi, MODM_STRMDATA, (DWORD)lpmhWork, sizeof(*lpmhWork));
if (mmrc == MMSYSERR_NOERROR)
++lpMidiHdr->dwReserved[MH_REFCNT], ++cSent;
lpmhWork++;
}
}
fCallback = FALSE;
EnterCriticalSection(&midiStrmHdrCritSec);
lpMidiHdr->dwFlags &= ~MHDR_SENDING;
if (cSent && 0 == lpMidiHdr->dwReserved[MH_REFCNT])
{
pms->lpmhFront = pms->lpmhFront->lpNext;
if (!pms->lpmhFront)
pms->lpmhRear = NULL;
fCallback = TRUE;
}
LeaveCriticalSection(&midiStrmHdrCritSec);
if (fCallback)
{
lpMidiHdr->dwFlags &= ~MHDR_INQUEUE;
lpMidiHdr->dwFlags |= MHDR_DONE;
DriverCallback(pms->dwCallback,
HIWORD(pms->fdwOpen),
(HDRVR)hMidiStrm,
MM_MOM_DONE,
pms->dwInstance,
(DWORD)lpMidiHdr,
0);
}
if (!cSent)
{
lpMidiHdr->dwFlags &= ~MHDR_INQUEUE;
return mmrc;
}
else
return MMSYSERR_NOERROR;
}
DWORD FAR PASCAL midiStreamMessage(PMIDISTRMID pmsi, UINT msg, DWORD dwP1, DWORD dwP2)
{
MMRESULT mrc;
if (!(pmsi->fdwId & MSI_F_EMULATOR))
{
EnterCriticalSection(&pmsi->CritSec);
mrc = (*(pmsi->drvMessage))
(0, msg, pmsi->dwDrvUser, dwP1, dwP2);
try
{
LeaveCriticalSection(&pmsi->CritSec);
}
except(EXCEPTION_EXECUTE_HANDLER)
{
}
return mrc;
}
else
{
mrc = mseMessage(msg, pmsi->dwDrvUser, dwP1, dwP2);
}
return mrc;
}
DWORD FAR PASCAL midiStreamBroadcast(
PMIDISTRM pms,
UINT msg,
DWORD dwP1,
DWORD dwP2)
{
DWORD idx;
DWORD mmrc;
DWORD mmrcRet;
PMIDISTRMID pmsi;
mmrcRet = MMSYSERR_NOERROR;
pmsi = pms->rgIds;
for (idx = pms->cIds; idx; idx--, pmsi++)
{
if (pmsi->fdwId & MSI_F_FIRST)
{
mmrc = midiStreamMessage(pmsi, msg, dwP1, dwP2);
if (MMSYSERR_NOERROR != mmrc)
mmrcRet = mmrc;
}
}
return mmrcRet;
}
void CALLBACK midiOutStreamCallback(
HMIDISTRM hMidiOut,
WORD wMsg,
DWORD dwInstance,
DWORD dwParam1,
DWORD dwParam2)
{
PMIDISTRM pms = HtoPT(PMIDISTRM, hMidiOut);
LPMIDIHDR lpmh = (LPMIDIHDR)dwParam1;
if (MM_MOM_POSITIONCB == wMsg)
{
LPMIDIHDR lpmh2 = (LPMIDIHDR)lpmh->dwReserved[MH_PARENT];
lpmh2->dwOffset = lpmh->dwOffset;
DriverCallback(pms->dwCallback,
HIWORD(pms->fdwOpen),
(HDRVR)hMidiOut,
MM_MOM_POSITIONCB,
pms->dwInstance,
(DWORD)lpmh2,
0);
return;
}
else if (MM_MOM_DONE != wMsg)
return;
#ifdef DEBUG
{
DWORD dwDelta = timeGetTime() - lpmh->dwReserved[7];
if (dwDelta > 1)
dprintf1(("Took %lu ms to deliver callback!", dwDelta));
}
#endif
lpmh = (LPMIDIHDR)lpmh->dwReserved[MH_PARENT];
dprintf2(("mOSCB PMS %04X HDR %08lX", (WORD)pms, (DWORD)lpmh));
--lpmh->dwReserved[MH_REFCNT];
if (0 == lpmh->dwReserved[MH_REFCNT] && (!(lpmh->dwFlags & MHDR_SENDING)))
{
EnterCriticalSection(&midiStrmHdrCritSec);
dprintf2(("Callback: Remove(%04X, %08lX)", (WORD)pms, (DWORD)pms->lpmhFront));
lpmh->dwFlags &= ~MHDR_INQUEUE;
lpmh->dwFlags |= MHDR_DONE;
pms->lpmhFront = pms->lpmhFront->lpNext;
if (!pms->lpmhFront)
pms->lpmhRear = NULL;
LeaveCriticalSection(&midiStrmHdrCritSec);
#ifdef DEBUG
lpmh->dwReserved[7] = timeGetTime();
#endif
DriverCallback(pms->dwCallback,
HIWORD(pms->fdwOpen),
(HDRVR)hMidiOut,
MM_MOM_DONE,
pms->dwInstance,
(DWORD)lpmh,
0);
}
}