Added YUV routines needed for v4l driver, and in the future possibly

[wine/gsoc-2012-control.git] / dlls / winmm / wineoss / midi.c

/* -*- tab-width: 8; c-basic-offset: 4 -*- */

/*
 * Sample MIDI Wine Driver for Open Sound System (basically Linux)
 *
 * Copyright 1994       Martin Ayotte
 * Copyright 1998       Luiz Otavio L. Zorzella (init procedures)
 * Copyright 1998/1999  Eric POUECH :
 *              98/7    changes for making this MIDI driver work on OSS
 *                      current support is limited to MIDI ports of OSS systems
 *              98/9    rewriting MCI code for MIDI
 *              98/11   splitted in midi.c and mcimidi.c
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

/* TODO:
 *    + use better instrument definition for OPL/2 (midiPatch.c) or
 *      use existing instrument definition (from playmidi or kmid)
 *      with a .winerc option 
 *    + have a look at OPL/3 ?
 *    + implement asynchronous playback of MidiHdr
 *    + implement STREAM'ed MidiHdr (question: how shall we share the
 *      code between the midiStream functions in MMSYSTEM/WINMM and
 *      the code for the low level driver)
 *    + use a more accurate read mechanism than the one of snooping on
 *      timers (like select on fd)
 */

#include "config.h"

#include <string.h>
#include <stdarg.h>
#include <stdio.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <fcntl.h>
#include <errno.h>
#ifdef HAVE_SYS_IOCTL_H
# include <sys/ioctl.h>
#endif
#ifdef HAVE_POLL_H
#include <poll.h>
#endif
#ifdef HAVE_SYS_POLL_H
#include <sys/poll.h>
#endif

#include "windef.h"
#include "winbase.h"
#include "wingdi.h"
#include "winuser.h"
#include "winnls.h"
#include "mmddk.h"
#include "oss.h"
#include "wine/unicode.h"
#include "wine/debug.h"

WINE_DEFAULT_DEBUG_CHANNEL(midi);

#ifdef HAVE_OSS_MIDI

#define MIDI_SEQ "/dev/sequencer"

typedef struct {
    int                 state;                  /* -1 disabled, 0 is no recording started, 1 in recording, bit 2 set if in sys exclusive recording */
    DWORD               bufsize;
    MIDIOPENDESC        midiDesc;
    WORD                wFlags;
    LPMIDIHDR           lpQueueHdr;
    DWORD               dwTotalPlayed;
    unsigned char       incoming[3];
    unsigned char       incPrev;
    char                incLen;
    DWORD               startTime;
    MIDIINCAPSW         caps;
} WINE_MIDIIN;

typedef struct {
    BOOL                bEnabled;
    DWORD               bufsize;
    MIDIOPENDESC        midiDesc;
    WORD                wFlags;
    LPMIDIHDR           lpQueueHdr;
    DWORD               dwTotalPlayed;
    void*               lpExtra;                /* according to port type (MIDI, FM...), extra data when needed */
    MIDIOUTCAPSW        caps;
} WINE_MIDIOUT;

static WINE_MIDIIN      MidiInDev [MAX_MIDIINDRV ];
static WINE_MIDIOUT     MidiOutDev[MAX_MIDIOUTDRV];

/* this is the total number of MIDI out devices found (synth and port) */
static  int             MODM_NumDevs = 0;
/* this is the number of FM synthetizers (index from 0 to NUMFMSYNTHDEVS - 1) */
static  int             MODM_NumFMSynthDevs = 0;
/* the Midi ports have index from NUMFMSYNTHDEVS to NumDevs - 1 */

/* this is the total number of MIDI out devices found */
static  int             MIDM_NumDevs = 0;

static  int             midiSeqFD = -1;
static  int             numOpenMidiSeq = 0;
static  int             numStartedMidiIn = 0;

static CRITICAL_SECTION crit_sect;   /* protects all MidiIn buffers queues */
static CRITICAL_SECTION_DEBUG critsect_debug =
{
    0, 0, &crit_sect,
    { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
      0, 0, { 0, (DWORD)(__FILE__ ": crit_sect") }
};
static CRITICAL_SECTION crit_sect = { &critsect_debug, -1, 0, 0, 0, 0 };

static int end_thread;
static HANDLE hThread;

/*======================================================================*
 *                  Low level MIDI implementation                       *
 *======================================================================*/

static int midiOpenSeq(void);
static int midiCloseSeq(void);

/**************************************************************************
 *                      MIDI_unixToWindowsDeviceType            [internal]
 *
 * return the Windows equivalent to a Unix Device Type
 *
 */
static  int     MIDI_UnixToWindowsDeviceType(int type)
{
    /* MOD_MIDIPORT     output port
     * MOD_SYNTH        generic internal synth
     * MOD_SQSYNTH      square wave internal synth
     * MOD_FMSYNTH      FM internal synth
     * MOD_MAPPER       MIDI mapper
     * MOD_WAVETABLE    hardware watetable internal synth
     * MOD_SWSYNTH      software internal synth
     */

    /* FIXME Is this really the correct equivalence from UNIX to
       Windows Sound type */

    switch (type) {
    case SYNTH_TYPE_FM:     return MOD_FMSYNTH;
    case SYNTH_TYPE_SAMPLE: return MOD_SYNTH;
    case SYNTH_TYPE_MIDI:   return MOD_MIDIPORT;
    default:
        ERR("Cannot determine the type of this midi device. "
            "Assuming FM Synth\n");
        return MOD_FMSYNTH;
    }
}

/**************************************************************************
 *                      OSS_MidiInit                            [internal]
 *
 * Initializes the MIDI devices information variables
 */
BOOL OSS_MidiInit(void)
{
    int                 i, status, numsynthdevs = 255, nummididevs = 255;
    struct synth_info   sinfo;
    struct midi_info    minfo;
    static      BOOL    bInitDone = FALSE;

    if (bInitDone)
        return TRUE;

    TRACE("Initializing the MIDI variables.\n");
    bInitDone = TRUE;

    /* try to open device */
    if (midiOpenSeq() == -1) {
        return TRUE;
    }

    /* find how many Synth devices are there in the system */
    status = ioctl(midiSeqFD, SNDCTL_SEQ_NRSYNTHS, &numsynthdevs);

    if (status == -1) {
        ERR("ioctl for nr synth failed.\n");
        midiCloseSeq();
        return TRUE;
    }

    if (numsynthdevs > MAX_MIDIOUTDRV) {
        ERR("MAX_MIDIOUTDRV (%d) was enough for the number of devices (%d). "
            "Some FM devices will not be available.\n",MAX_MIDIOUTDRV,numsynthdevs);
        numsynthdevs = MAX_MIDIOUTDRV;
    }

    for (i = 0; i < numsynthdevs; i++) {
        /* Manufac ID. We do not have access to this with soundcard.h
         * Does not seem to be a problem, because in mmsystem.h only
         * Microsoft's ID is listed.
         */
        MidiOutDev[i].caps.wMid = 0x00FF;
        MidiOutDev[i].caps.wPid = 0x0001;       /* FIXME Product ID  */
        /* Product Version. We simply say "1" */
        MidiOutDev[i].caps.vDriverVersion = 0x001;
        MidiOutDev[i].caps.wChannelMask   = 0xFFFF;

        /* FIXME Do we have this information?
         * Assuming the soundcards can handle
         * MIDICAPS_VOLUME and MIDICAPS_LRVOLUME but
         * not MIDICAPS_CACHE.
         */
        MidiOutDev[i].caps.dwSupport      = MIDICAPS_VOLUME|MIDICAPS_LRVOLUME;

        sinfo.device = i;
        status = ioctl(midiSeqFD, SNDCTL_SYNTH_INFO, &sinfo);
        if (status == -1) {
            static const WCHAR fmt[] = {'W','i','n','e',' ','O','S','S',' ','M','i','d','i',' ','O','u','t',' ','(','#','%','d',')',' ','-',' ','d','i','s','a','b','l','e','d',0};
            ERR("ioctl for synth info failed on %d, disabling it.\n", i);

            wsprintfW(MidiOutDev[i].caps.szPname, fmt, i);

            MidiOutDev[i].caps.wTechnology = MOD_MIDIPORT;
            MidiOutDev[i].caps.wVoices     = 16;
            MidiOutDev[i].caps.wNotes      = 16;
            MidiOutDev[i].bEnabled = FALSE;
        } else {
            MultiByteToWideChar( CP_ACP, 0, sinfo.name, -1,
                                 MidiOutDev[i].caps.szPname,
                                 sizeof(MidiOutDev[i].caps.szPname)/sizeof(WCHAR) );

            MidiOutDev[i].caps.wTechnology = MIDI_UnixToWindowsDeviceType(sinfo.synth_type);
            MidiOutDev[i].caps.wVoices     = sinfo.nr_voices;

            /* FIXME Is it possible to know the maximum
             * number of simultaneous notes of a soundcard ?
             * I believe we don't have this information, but
             * it's probably equal or more than wVoices
             */
            MidiOutDev[i].caps.wNotes      = sinfo.nr_voices;
            MidiOutDev[i].bEnabled = TRUE;
        }

        /* We also have the information sinfo.synth_subtype, not used here
         */

        if (sinfo.capabilities & SYNTH_CAP_INPUT) {
            FIXME("Synthesizer support MIDI in. Not supported yet (please report)\n");
        }

        TRACE("SynthOut[%d]\tname='%s' techn=%d voices=%d notes=%d chnMsk=%04x support=%ld\n"
              "\tOSS info: synth subtype=%d capa=%lx\n",
              i, wine_dbgstr_w(MidiOutDev[i].caps.szPname), 
              MidiOutDev[i].caps.wTechnology, 
              MidiOutDev[i].caps.wVoices, MidiOutDev[i].caps.wNotes, 
              MidiOutDev[i].caps.wChannelMask, MidiOutDev[i].caps.dwSupport,
              sinfo.synth_subtype, (long)sinfo.capabilities);
    }

    /* find how many MIDI devices are there in the system */
    status = ioctl(midiSeqFD, SNDCTL_SEQ_NRMIDIS, &nummididevs);
    if (status == -1) {
        ERR("ioctl on nr midi failed.\n");
        nummididevs = 0;
        goto wrapup;
    }

    /* FIXME: the two restrictions below could be loosened in some cases */
    if (numsynthdevs + nummididevs > MAX_MIDIOUTDRV) {
        ERR("MAX_MIDIOUTDRV was not enough for the number of devices. "
            "Some MIDI devices will not be available.\n");
        nummididevs = MAX_MIDIOUTDRV - numsynthdevs;
    }

    if (nummididevs > MAX_MIDIINDRV) {
        ERR("MAX_MIDIINDRV (%d) was not enough for the number of devices (%d). "
            "Some MIDI devices will not be available.\n",MAX_MIDIINDRV,nummididevs);
        nummididevs = MAX_MIDIINDRV;
    }

    for (i = 0; i < nummididevs; i++) {
        minfo.device = i;
        status = ioctl(midiSeqFD, SNDCTL_MIDI_INFO, &minfo);
        if (status == -1) WARN("ioctl on midi info for device %d failed.\n", i);

        /* This whole part is somewhat obscure to me. I'll keep trying to dig
           info about it. If you happen to know, please tell us. The very
           descritive minfo.dev_type was not used here.
        */
        /* Manufac ID. We do not have access to this with soundcard.h
           Does not seem to be a problem, because in mmsystem.h only
           Microsoft's ID is listed */
        MidiOutDev[numsynthdevs + i].caps.wMid = 0x00FF;
        MidiOutDev[numsynthdevs + i].caps.wPid = 0x0001;        /* FIXME Product ID */
        /* Product Version. We simply say "1" */
        MidiOutDev[numsynthdevs + i].caps.vDriverVersion = 0x001;
        if (status == -1) {
            static const WCHAR fmt[] = {'W','i','n','e',' ','O','S','S',' ','M','i','d','i',' ','O','u','t',' ','(','#','%','d',')',' ','-',' ','d','i','s','a','b','l','e','d',0};
            wsprintfW(MidiOutDev[numsynthdevs + i].caps.szPname, fmt, numsynthdevs + i);
            MidiOutDev[numsynthdevs + i].bEnabled = FALSE;
        } else {
            MultiByteToWideChar(CP_ACP, 0, minfo.name, -1, 
                                MidiOutDev[numsynthdevs + i].caps.szPname,
                                sizeof(MidiOutDev[numsynthdevs + i].caps.szPname) / sizeof(WCHAR));
            MidiOutDev[numsynthdevs + i].bEnabled = TRUE;
        }
        MidiOutDev[numsynthdevs + i].caps.wTechnology = MOD_MIDIPORT; /* FIXME Is this right? */
        /* Does it make any difference? */
        MidiOutDev[numsynthdevs + i].caps.wVoices     = 16;
        /* Does it make any difference? */
        MidiOutDev[numsynthdevs + i].caps.wNotes      = 16;
        MidiOutDev[numsynthdevs + i].caps.wChannelMask= 0xFFFF;

        /* FIXME Does it make any difference? */
        MidiOutDev[numsynthdevs + i].caps.dwSupport   = MIDICAPS_VOLUME|MIDICAPS_LRVOLUME;

        /* This whole part is somewhat obscure to me. I'll keep trying to dig
           info about it. If you happen to know, please tell us. The very
           descritive minfo.dev_type was not used here.
        */
        /* Manufac ID. We do not have access to this with soundcard.h
           Does not seem to be a problem, because in mmsystem.h only
           Microsoft's ID is listed */
        MidiInDev[i].caps.wMid = 0x00FF;
        MidiInDev[i].caps.wPid = 0x0001;        /* FIXME Product ID */
        /* Product Version. We simply say "1" */
        MidiInDev[i].caps.vDriverVersion = 0x001;
        if (status == -1) {
            static const WCHAR fmt[] = {'W','i','n','e',' ','O','S','S',' ','M','i','d','i',' ','I','n',' ','(','#','%','d',')',' ','-',' ','d','i','s','a','b','l','e','d',0};
            wsprintfW(MidiInDev[i].caps.szPname, fmt, numsynthdevs + i);
            MidiInDev[i].state = -1;
        } else {
            MultiByteToWideChar(CP_ACP, 0, minfo.name, -1, 
                                MidiInDev[i].caps.szPname,
                                sizeof(MidiInDev[i].caps.szPname) / sizeof(WCHAR));
            MidiInDev[i].state = 0;
        }
        /* FIXME : could we get better information than that ? */
        MidiInDev[i].caps.dwSupport   = MIDICAPS_VOLUME|MIDICAPS_LRVOLUME;

        TRACE("MidiOut[%d]\tname='%s' techn=%d voices=%d notes=%d chnMsk=%04x support=%ld\n"
              "MidiIn [%d]\tname='%s' support=%ld\n"
              "\tOSS info: midi dev-type=%d, capa=%lx\n",
              i, wine_dbgstr_w(MidiOutDev[numsynthdevs + i].caps.szPname), 
              MidiOutDev[numsynthdevs + i].caps.wTechnology,
              MidiOutDev[numsynthdevs + i].caps.wVoices, MidiOutDev[numsynthdevs + i].caps.wNotes,
              MidiOutDev[numsynthdevs + i].caps.wChannelMask, MidiOutDev[numsynthdevs + i].caps.dwSupport,
              i, wine_dbgstr_w(MidiInDev[i].caps.szPname), MidiInDev[i].caps.dwSupport,
              minfo.dev_type, (long)minfo.capabilities);
    }

 wrapup:
    /* windows does not seem to differentiate Synth from MIDI devices */
    MODM_NumFMSynthDevs = numsynthdevs;
    MODM_NumDevs        = numsynthdevs + nummididevs;

    MIDM_NumDevs        = nummididevs;

    /* close file and exit */
    midiCloseSeq();

    return TRUE;
}

/**************************************************************************
 *                      MIDI_NotifyClient                       [internal]
 */
static DWORD MIDI_NotifyClient(UINT wDevID, WORD wMsg,
                               DWORD dwParam1, DWORD dwParam2)
{
    DWORD               dwCallBack;
    UINT                uFlags;
    HANDLE              hDev;
    DWORD               dwInstance;

    TRACE("wDevID = %04X wMsg = %d dwParm1 = %04lX dwParam2 = %04lX\n",
          wDevID, wMsg, dwParam1, dwParam2);

    switch (wMsg) {
    case MOM_OPEN:
    case MOM_CLOSE:
    case MOM_DONE:
    case MOM_POSITIONCB:
        if (wDevID > MODM_NumDevs)
            return MMSYSERR_BADDEVICEID;

        dwCallBack = MidiOutDev[wDevID].midiDesc.dwCallback;
        uFlags = MidiOutDev[wDevID].wFlags;
        hDev = MidiOutDev[wDevID].midiDesc.hMidi;
        dwInstance = MidiOutDev[wDevID].midiDesc.dwInstance;
        break;

    case MIM_OPEN:
    case MIM_CLOSE:
    case MIM_DATA:
    case MIM_LONGDATA:
    case MIM_ERROR:
    case MIM_LONGERROR:
    case MIM_MOREDATA:
        if (wDevID > MIDM_NumDevs)
            return MMSYSERR_BADDEVICEID;

        dwCallBack = MidiInDev[wDevID].midiDesc.dwCallback;
        uFlags = MidiInDev[wDevID].wFlags;
        hDev = MidiInDev[wDevID].midiDesc.hMidi;
        dwInstance = MidiInDev[wDevID].midiDesc.dwInstance;
        break;
    default:
        WARN("Unsupported MSW-MIDI message %u\n", wMsg);
        return MMSYSERR_ERROR;
    }

    return DriverCallback(dwCallBack, uFlags, hDev, wMsg, dwInstance, dwParam1, dwParam2) ?
        0 : MMSYSERR_ERROR;
}

static int midi_warn = 1;
/**************************************************************************
 *                      midiOpenSeq                             [internal]
 */
static int midiOpenSeq(void)
{
    if (numOpenMidiSeq == 0) {
        midiSeqFD = open(MIDI_SEQ, O_RDWR, 0);
        if (midiSeqFD == -1) {
            if (midi_warn)
            {
                WARN("Can't open MIDI device '%s' ! (%s). If your "
                        "program needs this (probably not): %s\n",
                        MIDI_SEQ, strerror(errno),
                        errno == ENOENT ?
                        "create it ! (\"man MAKEDEV\" ?)" :
                        errno == ENODEV ?
                        "load MIDI sequencer kernel driver !" :
                        errno == EACCES ?
                        "grant access ! (\"man chmod\")" : ""
                );
            }
            midi_warn = 0;
            return -1;
        }
#if 0
        if (fcntl(midiSeqFD, F_SETFL, O_NONBLOCK) < 0) {
            WARN("can't set sequencer fd to non-blocking, errno %d (%s)\n", errno, strerror(errno));
            close(midiSeqFD);
            midiSeqFD = -1;
            return -1;
        }
#endif
        fcntl(midiSeqFD, F_SETFD, 1); /* set close on exec flag */
        ioctl(midiSeqFD, SNDCTL_SEQ_RESET);
    }
    numOpenMidiSeq++;
    return 0;
}

/**************************************************************************
 *                      midiCloseSeq                            [internal]
 */
static int midiCloseSeq(void)
{
    if (--numOpenMidiSeq == 0) {
        close(midiSeqFD);
        midiSeqFD = -1;
    }
    return 0;
}

/* FIXME: this is a bad idea, it's even not static... */
SEQ_DEFINEBUF(1024);

/* FIXME: this is not reentrant, not static - because of global variable
 * _seqbuf and al.
 */
/**************************************************************************
 *                      seqbuf_dump                             [internal]
 *
 * Used by SEQ_DUMPBUF to flush the buffer.
 *
 */
void seqbuf_dump(void)
{
    if (_seqbufptr) {
        if (write(midiSeqFD, _seqbuf, _seqbufptr) == -1) {
            WARN("Can't write data to sequencer %d, errno %d (%s)!\n",
                 midiSeqFD, errno, strerror(errno));
        }
        /* FIXME:
         *      in any case buffer is lost so that if many errors occur the buffer
         * will not overrun
         */
        _seqbufptr = 0;
    }
}

/**************************************************************************
 *                      midReceiveChar                          [internal]
 */
static void midReceiveChar(WORD wDevID, unsigned char value, DWORD dwTime)
{
    DWORD               toSend = 0;

    TRACE("Adding %02xh to %d[%d]\n", value, wDevID, MidiInDev[wDevID].incLen);

    if (wDevID >= MIDM_NumDevs) {
        WARN("bad devID\n");
        return;
    }
    if (MidiInDev[wDevID].state <= 0) {
        TRACE("disabled or input not started, thrown away\n");
        return;
    }

    if (MidiInDev[wDevID].state & 2) { /* system exclusive */
        LPMIDIHDR       lpMidiHdr;
        WORD            sbfb = FALSE;

        EnterCriticalSection(&crit_sect);
        if ((lpMidiHdr = MidiInDev[wDevID].lpQueueHdr) != NULL) {
            LPBYTE      lpData = lpMidiHdr->lpData;

            lpData[lpMidiHdr->dwBytesRecorded++] = value;
            if (lpMidiHdr->dwBytesRecorded == lpMidiHdr->dwBufferLength) {
                sbfb = TRUE;
            }
        }
        if (value == 0xF7) { /* then end */
            MidiInDev[wDevID].state &= ~2;
            sbfb = TRUE;
        }
        if (sbfb && lpMidiHdr != NULL) {
            lpMidiHdr = MidiInDev[wDevID].lpQueueHdr;
            lpMidiHdr->dwFlags &= ~MHDR_INQUEUE;
            lpMidiHdr->dwFlags |= MHDR_DONE;
            MidiInDev[wDevID].lpQueueHdr = (LPMIDIHDR)lpMidiHdr->lpNext;
            if (MIDI_NotifyClient(wDevID, MIM_LONGDATA, (DWORD)lpMidiHdr, dwTime) != MMSYSERR_NOERROR) {
                WARN("Couldn't notify client\n");
            }
        }
        LeaveCriticalSection(&crit_sect);
        return;
    }

#define IS_CMD(_x)      (((_x) & 0x80) == 0x80)
#define IS_SYS_CMD(_x)  (((_x) & 0xF0) == 0xF0)

    if (!IS_CMD(value) && MidiInDev[wDevID].incLen == 0) { /* try to reuse old cmd */
        if (IS_CMD(MidiInDev[wDevID].incPrev) && !IS_SYS_CMD(MidiInDev[wDevID].incPrev)) {
            MidiInDev[wDevID].incoming[0] = MidiInDev[wDevID].incPrev;
            MidiInDev[wDevID].incLen = 1;
            TRACE("Reusing old command %02xh\n", MidiInDev[wDevID].incPrev);
        } else {
            FIXME("error for midi-in, should generate MIM_ERROR notification:"
                  " prev=%02Xh, incLen=%02Xh\n",
                  MidiInDev[wDevID].incPrev, MidiInDev[wDevID].incLen);
            return;
        }
    }
    MidiInDev[wDevID].incoming[(int)(MidiInDev[wDevID].incLen++)] = value;
    if (MidiInDev[wDevID].incLen == 1 && !IS_SYS_CMD(MidiInDev[wDevID].incoming[0])) {
        /* store new cmd, just in case */
        MidiInDev[wDevID].incPrev = MidiInDev[wDevID].incoming[0];
    }

#undef IS_CMD
#undef IS_SYS_CMD

    switch (MidiInDev[wDevID].incoming[0] & 0xF0) {
    case MIDI_NOTEOFF:
    case MIDI_NOTEON:
    case MIDI_KEY_PRESSURE:
    case MIDI_CTL_CHANGE:
    case MIDI_PITCH_BEND:
        if (MidiInDev[wDevID].incLen == 3) {
            toSend = (MidiInDev[wDevID].incoming[2] << 16) |
                (MidiInDev[wDevID].incoming[1] <<  8) |
                (MidiInDev[wDevID].incoming[0] <<  0);
        }
        break;
    case MIDI_PGM_CHANGE:
    case MIDI_CHN_PRESSURE:
        if (MidiInDev[wDevID].incLen == 2) {
            toSend = (MidiInDev[wDevID].incoming[1] <<  8) |
                (MidiInDev[wDevID].incoming[0] <<  0);
        }
        break;
    case MIDI_SYSTEM_PREFIX:
        if (MidiInDev[wDevID].incoming[0] == 0xF0) {
            MidiInDev[wDevID].state |= 2;
            MidiInDev[wDevID].incLen = 0;
        } else {
            if (MidiInDev[wDevID].incLen == 1) {
                toSend = (MidiInDev[wDevID].incoming[0] <<  0);
            }
        }
        break;
    default:
        WARN("This shouldn't happen (%02X)\n", MidiInDev[wDevID].incoming[0]);
    }
    if (toSend != 0) {
        TRACE("Sending event %08lx\n", toSend);
        MidiInDev[wDevID].incLen =      0;
        dwTime -= MidiInDev[wDevID].startTime;
        if (MIDI_NotifyClient(wDevID, MIM_DATA, toSend, dwTime) != MMSYSERR_NOERROR) {
            WARN("Couldn't notify client\n");
        }
    }
}

static DWORD WINAPI midRecThread(LPVOID arg)
{
    unsigned char buffer[256];
    int len, idx;
    DWORD dwTime;
    struct pollfd pfd;

    TRACE("Thread startup\n");

    pfd.fd = midiSeqFD;
    pfd.fd = POLLIN;
    
    while(!end_thread) {
        TRACE("Thread loop\n");

        /* Check if an event is present */
        if (poll(&pfd, 1, 250) <= 0)
            continue;
        
        len = read(midiSeqFD, buffer, sizeof(buffer));
        TRACE("Reveived %d bytes\n", len);

        if (len < 0) continue;
        if ((len % 4) != 0) {
            WARN("Bad length %d, errno %d (%s)\n", len, errno, strerror(errno));
            continue;
        }

        dwTime = GetTickCount();
        
        for (idx = 0; idx < len; ) {
            if (buffer[idx] & 0x80) {
                TRACE(
                      "Reading<8> %02x %02x %02x %02x %02x %02x %02x %02x\n",
                      buffer[idx + 0], buffer[idx + 1],
                      buffer[idx + 2], buffer[idx + 3],
                      buffer[idx + 4], buffer[idx + 5],
                      buffer[idx + 6], buffer[idx + 7]);
                      idx += 8;
            } else {
                switch (buffer[idx + 0]) {
                case SEQ_WAIT:
                case SEQ_ECHO:
                    break;
                case SEQ_MIDIPUTC:
                    midReceiveChar(buffer[idx + 2], buffer[idx + 1], dwTime);
                    break;
                default:
                    TRACE("Unsupported event %d\n", buffer[idx + 0]);
                    break;
                }
                idx += 4;
            }
        }
    }
    return 0;
}

/**************************************************************************
 *                              midGetDevCaps                   [internal]
 */
static DWORD midGetDevCaps(WORD wDevID, LPMIDIINCAPSW lpCaps, DWORD dwSize)
{
    TRACE("(%04X, %p, %08lX);\n", wDevID, lpCaps, dwSize);

    if (wDevID >= MIDM_NumDevs) return MMSYSERR_BADDEVICEID;
    if (lpCaps == NULL)         return MMSYSERR_INVALPARAM;

    memcpy(lpCaps, &MidiInDev[wDevID].caps, min(dwSize, sizeof(*lpCaps)));

    return MMSYSERR_NOERROR;
}

/**************************************************************************
 *                      midOpen                                 [internal]
 */
static DWORD midOpen(WORD wDevID, LPMIDIOPENDESC lpDesc, DWORD dwFlags)
{
    TRACE("(%04X, %p, %08lX);\n", wDevID, lpDesc, dwFlags);

    if (lpDesc == NULL) {
        WARN("Invalid Parameter !\n");
        return MMSYSERR_INVALPARAM;
    }

    /* FIXME :
     *  how to check that content of lpDesc is correct ?
     */
    if (wDevID >= MIDM_NumDevs) {
        WARN("wDevID too large (%u) !\n", wDevID);
        return MMSYSERR_BADDEVICEID;
    }
    if (MidiInDev[wDevID].state == -1) {        
        WARN("device disabled\n");
        return MIDIERR_NODEVICE;
    }
    if (MidiInDev[wDevID].midiDesc.hMidi != 0) {
        WARN("device already open !\n");
        return MMSYSERR_ALLOCATED;
    }
    if ((dwFlags & MIDI_IO_STATUS) != 0) {
        WARN("No support for MIDI_IO_STATUS in dwFlags yet, ignoring it\n");
        dwFlags &= ~MIDI_IO_STATUS;
    }
    if ((dwFlags & ~CALLBACK_TYPEMASK) != 0) {
        FIXME("Bad dwFlags\n");
        return MMSYSERR_INVALFLAG;
    }

    if (midiOpenSeq() < 0) {
        return MMSYSERR_ERROR;
    }

    if (numStartedMidiIn++ == 0) {
        end_thread = 0;
        hThread = CreateThread(NULL, 0, midRecThread, NULL, 0, NULL);
        if (!hThread) {
            numStartedMidiIn = 0;
            WARN("Couldn't create thread for midi-in\n");
            midiCloseSeq();
            return MMSYSERR_ERROR;
        }
        SetThreadPriority(hThread, THREAD_PRIORITY_TIME_CRITICAL);
        TRACE("Created thread for midi-in\n");
    }

    MidiInDev[wDevID].wFlags = HIWORD(dwFlags & CALLBACK_TYPEMASK);

    MidiInDev[wDevID].lpQueueHdr = NULL;
    MidiInDev[wDevID].dwTotalPlayed = 0;
    MidiInDev[wDevID].bufsize = 0x3FFF;
    MidiInDev[wDevID].midiDesc = *lpDesc;
    MidiInDev[wDevID].state = 0;
    MidiInDev[wDevID].incLen = 0;
    MidiInDev[wDevID].startTime = 0;

    if (MIDI_NotifyClient(wDevID, MIM_OPEN, 0L, 0L) != MMSYSERR_NOERROR) {
        WARN("can't notify client !\n");
        return MMSYSERR_INVALPARAM;
    }
    return MMSYSERR_NOERROR;
}

/**************************************************************************
 *                      midClose                                [internal]
 */
static DWORD midClose(WORD wDevID)
{
    int         ret = MMSYSERR_NOERROR;

    TRACE("(%04X);\n", wDevID);

    if (wDevID >= MIDM_NumDevs) {
        WARN("wDevID too big (%u) !\n", wDevID);
        return MMSYSERR_BADDEVICEID;
    }
    if (MidiInDev[wDevID].midiDesc.hMidi == 0) {
        WARN("device not opened !\n");
        return MMSYSERR_ERROR;
    }
    if (MidiInDev[wDevID].lpQueueHdr != 0) {
        return MIDIERR_STILLPLAYING;
    }

    if (midiSeqFD == -1) {
        WARN("ooops !\n");
        return MMSYSERR_ERROR;
    }
    if (--numStartedMidiIn == 0) {
        TRACE("Stopping thread for midi-in\n");
        end_thread = 1;
        if (WaitForSingleObject(hThread, 5000) != WAIT_OBJECT_0) {
            WARN("Thread end not signaled, force termination\n");
            TerminateThread(hThread, 0);
        }
        TRACE("Stopped thread for midi-in\n");
    }
    midiCloseSeq();

    MidiInDev[wDevID].bufsize = 0;
    if (MIDI_NotifyClient(wDevID, MIM_CLOSE, 0L, 0L) != MMSYSERR_NOERROR) {
        WARN("can't notify client !\n");
        ret = MMSYSERR_INVALPARAM;
    }
    MidiInDev[wDevID].midiDesc.hMidi = 0;
    return ret;
}

/**************************************************************************
 *                              midAddBuffer                    [internal]
 */
static DWORD midAddBuffer(WORD wDevID, LPMIDIHDR lpMidiHdr, DWORD dwSize)
{
    TRACE("(%04X, %p, %08lX);\n", wDevID, lpMidiHdr, dwSize);

    if (wDevID >= MIDM_NumDevs) return MMSYSERR_BADDEVICEID;
    if (MidiInDev[wDevID].state == -1) return MIDIERR_NODEVICE;

    if (lpMidiHdr == NULL)      return MMSYSERR_INVALPARAM;
    if (sizeof(MIDIHDR) > dwSize) return MMSYSERR_INVALPARAM;
    if (lpMidiHdr->dwBufferLength == 0) return MMSYSERR_INVALPARAM;
    if (lpMidiHdr->dwFlags & MHDR_INQUEUE) return MIDIERR_STILLPLAYING;
    if (!(lpMidiHdr->dwFlags & MHDR_PREPARED)) return MIDIERR_UNPREPARED;

    EnterCriticalSection(&crit_sect);
    if (MidiInDev[wDevID].lpQueueHdr == 0) {
        MidiInDev[wDevID].lpQueueHdr = lpMidiHdr;
    } else {
        LPMIDIHDR       ptr;

        for (ptr = MidiInDev[wDevID].lpQueueHdr;
             ptr->lpNext != 0;
             ptr = (LPMIDIHDR)ptr->lpNext);
        ptr->lpNext = (struct midihdr_tag*)lpMidiHdr;
    }
    LeaveCriticalSection(&crit_sect);

    return MMSYSERR_NOERROR;
}

/**************************************************************************
 *                              midPrepare                      [internal]
 */
static DWORD midPrepare(WORD wDevID, LPMIDIHDR lpMidiHdr, DWORD dwSize)
{
    TRACE("(%04X, %p, %08lX);\n", wDevID, lpMidiHdr, dwSize);

    if (dwSize < sizeof(MIDIHDR) || lpMidiHdr == 0 ||
        lpMidiHdr->lpData == 0 || (lpMidiHdr->dwFlags & MHDR_INQUEUE) != 0 ||
        lpMidiHdr->dwBufferLength >= 0x10000ul)
        return MMSYSERR_INVALPARAM;

    lpMidiHdr->lpNext = 0;
    lpMidiHdr->dwFlags |= MHDR_PREPARED;
    lpMidiHdr->dwBytesRecorded = 0;

    return MMSYSERR_NOERROR;
}

/**************************************************************************
 *                              midUnprepare                    [internal]
 */
static DWORD midUnprepare(WORD wDevID, LPMIDIHDR lpMidiHdr, DWORD dwSize)
{
    TRACE("(%04X, %p, %08lX);\n", wDevID, lpMidiHdr, dwSize);

    if (wDevID >= MIDM_NumDevs) return MMSYSERR_BADDEVICEID;
    if (MidiInDev[wDevID].state == -1) return MIDIERR_NODEVICE;

    if (dwSize < sizeof(MIDIHDR) || lpMidiHdr == 0 ||
        lpMidiHdr->lpData == 0 || lpMidiHdr->dwBufferLength >= 0x10000ul)
        return MMSYSERR_INVALPARAM;

    if (!(lpMidiHdr->dwFlags & MHDR_PREPARED)) return MIDIERR_UNPREPARED;
    if (lpMidiHdr->dwFlags & MHDR_INQUEUE) return MIDIERR_STILLPLAYING;

    lpMidiHdr->dwFlags &= ~MHDR_PREPARED;

    return MMSYSERR_NOERROR;
}

/**************************************************************************
 *                      midReset                                [internal]
 */
static DWORD midReset(WORD wDevID)
{
    DWORD               dwTime = GetTickCount();

    TRACE("(%04X);\n", wDevID);

    if (wDevID >= MIDM_NumDevs) return MMSYSERR_BADDEVICEID;
    if (MidiInDev[wDevID].state == -1) return MIDIERR_NODEVICE;

    EnterCriticalSection(&crit_sect);
    while (MidiInDev[wDevID].lpQueueHdr) {
        MidiInDev[wDevID].lpQueueHdr->dwFlags &= ~MHDR_INQUEUE;
        MidiInDev[wDevID].lpQueueHdr->dwFlags |= MHDR_DONE;
        /* FIXME: when called from 16 bit, lpQueueHdr needs to be a segmented ptr */
        if (MIDI_NotifyClient(wDevID, MIM_LONGDATA,
                              (DWORD)MidiInDev[wDevID].lpQueueHdr, dwTime) != MMSYSERR_NOERROR) {
            WARN("Couldn't notify client\n");
        }
        MidiInDev[wDevID].lpQueueHdr = (LPMIDIHDR)MidiInDev[wDevID].lpQueueHdr->lpNext;
    }
    LeaveCriticalSection(&crit_sect);

    return MMSYSERR_NOERROR;
}


/**************************************************************************
 *                      midStart                                [internal]
 */
static DWORD midStart(WORD wDevID)
{
    TRACE("(%04X);\n", wDevID);

    if (wDevID >= MIDM_NumDevs) return MMSYSERR_BADDEVICEID;
    if (MidiInDev[wDevID].state == -1) return MIDIERR_NODEVICE;

    MidiInDev[wDevID].state = 1;
    MidiInDev[wDevID].startTime = GetTickCount();
    return MMSYSERR_NOERROR;
}

/**************************************************************************
 *                      midStop                                 [internal]
 */
static DWORD midStop(WORD wDevID)
{
    TRACE("(%04X);\n", wDevID);

    if (wDevID >= MIDM_NumDevs) return MMSYSERR_BADDEVICEID;
    if (MidiInDev[wDevID].state == -1) return MIDIERR_NODEVICE;

    MidiInDev[wDevID].state = 0;
    return MMSYSERR_NOERROR;
}

/*-----------------------------------------------------------------------*/

typedef struct sVoice {
    int                 note;                   /* 0 means not used */
    int                 channel;
    unsigned            cntMark : 30,
                        status : 2;
#define sVS_UNUSED      0
#define sVS_PLAYING     1
#define sVS_SUSTAINED   2
} sVoice;

typedef struct sChannel {
    int                 program;

    int                 bender;
    int                 benderRange;
    /* controlers */
    int                 bank;           /* CTL_BANK_SELECT */
    int                 volume;         /* CTL_MAIN_VOLUME */
    int                 balance;        /* CTL_BALANCE     */
    int                 expression;     /* CTL_EXPRESSION  */
    int                 sustain;        /* CTL_SUSTAIN     */

    unsigned char       nrgPmtMSB;      /* Non register Parameters */
    unsigned char       nrgPmtLSB;
    unsigned char       regPmtMSB;      /* Non register Parameters */
    unsigned char       regPmtLSB;
} sChannel;

typedef struct sFMextra {
    unsigned            counter;
    int                 drumSetMask;
    sChannel            channel[16];    /* MIDI has only 16 channels */
    sVoice              voice[1];       /* dyn allocated according to sound card */
    /* do not append fields below voice[1] since the size of this structure
     * depends on the number of available voices on the FM synth...
     */
} sFMextra;

extern  unsigned char midiFMInstrumentPatches[16 * 128];
extern  unsigned char midiFMDrumsPatches     [16 * 128];

/**************************************************************************
 *                      modFMLoad                               [internal]
 */
static int modFMLoad(int dev)
{
    int                         i;
    struct sbi_instrument       sbi;

    sbi.device = dev;
    sbi.key = FM_PATCH;

    memset(sbi.operators + 16, 0, 16);
    for (i = 0; i < 128; i++) {
        sbi.channel = i;
        memcpy(sbi.operators, midiFMInstrumentPatches + i * 16, 16);

        if (write(midiSeqFD, (char*)&sbi, sizeof(sbi)) == -1) {
            WARN("Couldn't write patch for instrument %d, errno %d (%s)!\n", sbi.channel, errno, strerror(errno));
            return -1;
        }
    }
    for (i = 0; i < 128; i++) {
        sbi.channel = 128 + i;
        memcpy(sbi.operators, midiFMDrumsPatches + i * 16, 16);

        if (write(midiSeqFD, (char*)&sbi, sizeof(sbi)) == -1) {
            WARN("Couldn't write patch for drum %d, errno %d (%s)!\n", sbi.channel, errno, strerror(errno));
            return -1;
        }
    }
    return 0;
}

/**************************************************************************
 *                      modFMReset                              [internal]
 */
static  void modFMReset(WORD wDevID)
{
    sFMextra*   extra   = (sFMextra*)MidiOutDev[wDevID].lpExtra;
    sVoice*     voice   = extra->voice;
    sChannel*   channel = extra->channel;
    int         i;

    for (i = 0; i < MidiOutDev[wDevID].caps.wVoices; i++) {
        if (voice[i].status != sVS_UNUSED) {
            SEQ_STOP_NOTE(wDevID, i, voice[i].note, 64);
        }
        SEQ_KEY_PRESSURE(wDevID, i, 127, 0);
        SEQ_CONTROL(wDevID, i, SEQ_VOLMODE, VOL_METHOD_LINEAR);
        voice[i].note = 0;
        voice[i].channel = -1;
        voice[i].cntMark = 0;
        voice[i].status = sVS_UNUSED;
    }
    for (i = 0; i < 16; i++) {
        channel[i].program = 0;
        channel[i].bender = 8192;
        channel[i].benderRange = 2;
        channel[i].bank = 0;
        channel[i].volume = 127;
        channel[i].balance = 64;
        channel[i].expression = 0;
        channel[i].sustain = 0;
    }
    extra->counter = 0;
    extra->drumSetMask = 1 << 9; /* channel 10 is normally drums, sometimes 16 also */
    SEQ_DUMPBUF();
}

#define         IS_DRUM_CHANNEL(_xtra, _chn)    ((_xtra)->drumSetMask & (1 << (_chn)))

/**************************************************************************
 *                              modGetDevCaps                   [internal]
 */
static DWORD modGetDevCaps(WORD wDevID, LPMIDIOUTCAPSW lpCaps, DWORD dwSize)
{
    TRACE("(%04X, %p, %08lX);\n", wDevID, lpCaps, dwSize);

    if (wDevID >= MODM_NumDevs) return MMSYSERR_BADDEVICEID;
    if (lpCaps == NULL)         return MMSYSERR_INVALPARAM;

    memcpy(lpCaps, &MidiOutDev[wDevID].caps, min(dwSize, sizeof(*lpCaps)));

    return MMSYSERR_NOERROR;
}

/**************************************************************************
 *                      modOpen                                 [internal]
 */
static DWORD modOpen(WORD wDevID, LPMIDIOPENDESC lpDesc, DWORD dwFlags)
{
    TRACE("(%04X, %p, %08lX);\n", wDevID, lpDesc, dwFlags);
    if (lpDesc == NULL) {
        WARN("Invalid Parameter !\n");
        return MMSYSERR_INVALPARAM;
    }
    if (wDevID >= MODM_NumDevs) {
        TRACE("MAX_MIDIOUTDRV reached !\n");
        return MMSYSERR_BADDEVICEID;
    }
    if (MidiOutDev[wDevID].midiDesc.hMidi != 0) {
        WARN("device already open !\n");
        return MMSYSERR_ALLOCATED;
    }
    if (!MidiOutDev[wDevID].bEnabled) {
        WARN("device disabled !\n");
        return MIDIERR_NODEVICE;
    }
    if ((dwFlags & ~CALLBACK_TYPEMASK) != 0) {
        WARN("bad dwFlags\n");
        return MMSYSERR_INVALFLAG;
    }
    if (!MidiOutDev[wDevID].bEnabled) {
        TRACE("disabled wDevID\n");
        return MMSYSERR_NOTENABLED;
    }

    MidiOutDev[wDevID].lpExtra = 0;

    switch (MidiOutDev[wDevID].caps.wTechnology) {
    case MOD_FMSYNTH:
        {
            void*       extra;

            extra = HeapAlloc(GetProcessHeap(), 0,
                              sizeof(struct sFMextra) +
                              sizeof(struct sVoice) * (MidiOutDev[wDevID].caps.wVoices - 1));

            if (extra == 0) {
                WARN("can't alloc extra data !\n");
                return MMSYSERR_NOMEM;
            }
            MidiOutDev[wDevID].lpExtra = extra;
            if (midiOpenSeq() < 0) {
                MidiOutDev[wDevID].lpExtra = 0;
                HeapFree(GetProcessHeap(), 0, extra);
                return MMSYSERR_ERROR;
            }
            if (modFMLoad(wDevID) < 0) {
                midiCloseSeq();
                MidiOutDev[wDevID].lpExtra = 0;
                HeapFree(GetProcessHeap(), 0, extra);
                return MMSYSERR_ERROR;
            }
            modFMReset(wDevID);
        }
        break;
    case MOD_MIDIPORT:
    case MOD_SYNTH:
        if (midiOpenSeq() < 0) {
            return MMSYSERR_ALLOCATED;
        }
        break;
    default:
        WARN("Technology not supported (yet) %d !\n",
             MidiOutDev[wDevID].caps.wTechnology);
        return MMSYSERR_NOTENABLED;
    }

    MidiOutDev[wDevID].wFlags = HIWORD(dwFlags & CALLBACK_TYPEMASK);

    MidiOutDev[wDevID].lpQueueHdr = NULL;
    MidiOutDev[wDevID].dwTotalPlayed = 0;
    MidiOutDev[wDevID].bufsize = 0x3FFF;
    MidiOutDev[wDevID].midiDesc = *lpDesc;

    if (MIDI_NotifyClient(wDevID, MOM_OPEN, 0L, 0L) != MMSYSERR_NOERROR) {
        WARN("can't notify client !\n");
        return MMSYSERR_INVALPARAM;
    }
    TRACE("Successful !\n");
    return MMSYSERR_NOERROR;
}


/**************************************************************************
 *                      modClose                                [internal]
 */
static DWORD modClose(WORD wDevID)
{
    int ret = MMSYSERR_NOERROR;

    TRACE("(%04X);\n", wDevID);

    if (MidiOutDev[wDevID].midiDesc.hMidi == 0) {
        WARN("device not opened !\n");
        return MMSYSERR_ERROR;
    }
    /* FIXME: should test that no pending buffer is still in the queue for
     * playing */

    if (midiSeqFD == -1) {
        WARN("can't close !\n");
        return MMSYSERR_ERROR;
    }

    switch (MidiOutDev[wDevID].caps.wTechnology) {
    case MOD_FMSYNTH:
    case MOD_MIDIPORT:
        midiCloseSeq();
        break;
    default:
        WARN("Technology not supported (yet) %d !\n",
             MidiOutDev[wDevID].caps.wTechnology);
        return MMSYSERR_NOTENABLED;
    }

    HeapFree(GetProcessHeap(), 0, MidiOutDev[wDevID].lpExtra);
    MidiOutDev[wDevID].lpExtra = 0;

    MidiOutDev[wDevID].bufsize = 0;
    if (MIDI_NotifyClient(wDevID, MOM_CLOSE, 0L, 0L) != MMSYSERR_NOERROR) {
        WARN("can't notify client !\n");
        ret = MMSYSERR_INVALPARAM;
    }
    MidiOutDev[wDevID].midiDesc.hMidi = 0;
    return ret;
}

/**************************************************************************
 *                      modData                                 [internal]
 */
static DWORD modData(WORD wDevID, DWORD dwParam)
{
    WORD        evt = LOBYTE(LOWORD(dwParam));
    WORD        d1  = HIBYTE(LOWORD(dwParam));
    WORD        d2  = LOBYTE(HIWORD(dwParam));

    TRACE("(%04X, %08lX);\n", wDevID, dwParam);

    if (wDevID >= MODM_NumDevs) return MMSYSERR_BADDEVICEID;
    if (!MidiOutDev[wDevID].bEnabled) return MIDIERR_NODEVICE;

    if (midiSeqFD == -1) {
        WARN("can't play !\n");
        return MIDIERR_NODEVICE;
    }
    switch (MidiOutDev[wDevID].caps.wTechnology) {
    case MOD_FMSYNTH:
        /* FIXME:
         *      - chorus depth controller is not used
         */
        {
            sFMextra*   extra   = (sFMextra*)MidiOutDev[wDevID].lpExtra;
            sVoice*     voice   = extra->voice;
            sChannel*   channel = extra->channel;
            int         chn = (evt & 0x0F);
            int         i, nv;

            switch (evt & 0xF0) {
            case MIDI_NOTEOFF:
                for (i = 0; i < MidiOutDev[wDevID].caps.wVoices; i++) {
                                /* don't stop sustained notes */
                    if (voice[i].status == sVS_PLAYING && voice[i].channel == chn && voice[i].note == d1) {
                        voice[i].status = sVS_UNUSED;
                        SEQ_STOP_NOTE(wDevID, i, d1, d2);
                    }
                }
                break;
            case MIDI_NOTEON:
                if (d2 == 0) { /* note off if velocity == 0 */
                    for (i = 0; i < MidiOutDev[wDevID].caps.wVoices; i++) {
                        /* don't stop sustained notes */
                        if (voice[i].status == sVS_PLAYING && voice[i].channel == chn && voice[i].note == d1) {
                            voice[i].status = sVS_UNUSED;
                            SEQ_STOP_NOTE(wDevID, i, d1, 64);
                        }
                    }
                    break;
                }
                /* finding out in this order :
                 *      - an empty voice
                 *      - if replaying the same note on the same channel
                 *      - the older voice (LRU)
                 */
                for (i = nv = 0; i < MidiOutDev[wDevID].caps.wVoices; i++) {
                    if (voice[i].status == sVS_UNUSED ||
                        (voice[i].note == d1 && voice[i].channel == chn)) {
                        nv = i;
                        break;
                    }
                    if (voice[i].cntMark < voice[0].cntMark) {
                        nv = i;
                    }
                }
                TRACE(
                      "playing on voice=%d, pgm=%d, pan=0x%02X, vol=0x%02X, "
                      "bender=0x%02X, note=0x%02X, vel=0x%02X\n",
                      nv, channel[chn].program,
                      channel[chn].balance,
                      channel[chn].volume,
                      channel[chn].bender, d1, d2);

                SEQ_SET_PATCH(wDevID, nv, IS_DRUM_CHANNEL(extra, chn) ?
                              (128 + d1) : channel[chn].program);
                SEQ_BENDER_RANGE(wDevID, nv, channel[chn].benderRange * 100);
                SEQ_BENDER(wDevID, nv, channel[chn].bender);
                SEQ_CONTROL(wDevID, nv, CTL_PAN, channel[chn].balance);
                SEQ_CONTROL(wDevID, nv, CTL_EXPRESSION, channel[chn].expression);
#if 0
                /* FIXME: does not really seem to work on my SB card and
                 * screws everything up... so lay it down
                 */
                SEQ_CONTROL(wDevID, nv, CTL_MAIN_VOLUME, channel[chn].volume);
#endif
                SEQ_START_NOTE(wDevID, nv, d1, d2);
                voice[nv].status = channel[chn].sustain ? sVS_SUSTAINED : sVS_PLAYING;
                voice[nv].note = d1;
                voice[nv].channel = chn;
                voice[nv].cntMark = extra->counter++;
                break;
            case MIDI_KEY_PRESSURE:
                for (i = 0; i < MidiOutDev[wDevID].caps.wVoices; i++) {
                    if (voice[i].status != sVS_UNUSED && voice[i].channel == chn && voice[i].note == d1) {
                        SEQ_KEY_PRESSURE(wDevID, i, d1, d2);
                    }
                }
                break;
            case MIDI_CTL_CHANGE:
                switch (d1) {
                case CTL_BANK_SELECT:   channel[chn].bank = d2;         break;
                case CTL_MAIN_VOLUME:   channel[chn].volume = d2;       break;
                case CTL_PAN:           channel[chn].balance = d2;      break;
                case CTL_EXPRESSION:    channel[chn].expression = d2;   break;
                case CTL_SUSTAIN:       channel[chn].sustain = d2;
                    if (d2) {
                        for (i = 0; i < MidiOutDev[wDevID].caps.wVoices; i++) {
                            if (voice[i].status == sVS_PLAYING && voice[i].channel == chn) {
                                voice[i].status = sVS_SUSTAINED;
                            }
                        }
                    } else {
                        for (i = 0; i < MidiOutDev[wDevID].caps.wVoices; i++) {
                            if (voice[i].status == sVS_SUSTAINED && voice[i].channel == chn) {
                                voice[i].status = sVS_UNUSED;
                                SEQ_STOP_NOTE(wDevID, i, voice[i].note, 64);
                            }
                        }
                    }
                    break;
                case CTL_NONREG_PARM_NUM_LSB:   channel[chn].nrgPmtLSB = d2;    break;
                case CTL_NONREG_PARM_NUM_MSB:   channel[chn].nrgPmtMSB = d2;    break;
                case CTL_REGIST_PARM_NUM_LSB:   channel[chn].regPmtLSB = d2;    break;
                case CTL_REGIST_PARM_NUM_MSB:   channel[chn].regPmtMSB = d2;    break;
                case CTL_DATA_ENTRY:
                    switch ((channel[chn].regPmtMSB << 8) | channel[chn].regPmtLSB) {
                    case 0x0000:
                        if (channel[chn].benderRange != d2) {
                            channel[chn].benderRange = d2;
                            for (i = 0; i < MidiOutDev[wDevID].caps.wVoices; i++) {
                                if (voice[i].channel == chn) {
                                    SEQ_BENDER_RANGE(wDevID, i, channel[chn].benderRange);
                                }
                            }
                        }
                        break;

                    case 0x7F7F:
                        channel[chn].benderRange = 2;
                        for (i = 0; i < MidiOutDev[wDevID].caps.wVoices; i++) {
                            if (voice[i].channel == chn) {
                                SEQ_BENDER_RANGE(wDevID, i, channel[chn].benderRange);
                            }
                        }
                        break;
                    default:
                        TRACE("Data entry: regPmt=0x%02x%02x, nrgPmt=0x%02x%02x with %x\n",
                              channel[chn].regPmtMSB, channel[chn].regPmtLSB,
                              channel[chn].nrgPmtMSB, channel[chn].nrgPmtLSB,
                              d2);
                        break;
                    }
                    break;

                case 0x78: /* all sounds off */
                    /* FIXME: I don't know if I have to take care of the channel
                     * for this control ?
                     */
                    for (i = 0; i < MidiOutDev[wDevID].caps.wVoices; i++) {
                        if (voice[i].status != sVS_UNUSED && voice[i].channel == chn) {
                            voice[i].status = sVS_UNUSED;
                            SEQ_STOP_NOTE(wDevID, i, voice[i].note, 64);
                        }
                    }
                    break;
                case 0x7B: /* all notes off */
                    /* FIXME: I don't know if I have to take care of the channel
                     * for this control ?
                     */
                    for (i = 0; i < MidiOutDev[wDevID].caps.wVoices; i++) {
                        if (voice[i].status == sVS_PLAYING && voice[i].channel == chn) {
                            voice[i].status = sVS_UNUSED;
                            SEQ_STOP_NOTE(wDevID, i, voice[i].note, 64);
                        }
                    }
                    break;
                default:
                    TRACE("Dropping MIDI control event 0x%02x(%02x) on channel %d\n",
                          d1, d2, chn);
                    break;
                }
                break;
            case MIDI_PGM_CHANGE:
                channel[chn].program = d1;
                break;
            case MIDI_CHN_PRESSURE:
                for (i = 0; i < MidiOutDev[wDevID].caps.wVoices; i++) {
                    if (voice[i].status != sVS_UNUSED && voice[i].channel == chn) {
                        SEQ_KEY_PRESSURE(wDevID, i, voice[i].note, d1);
                    }
                }
                break;
            case MIDI_PITCH_BEND:
                channel[chn].bender = (d2 << 7) + d1;
                for (i = 0; i < MidiOutDev[wDevID].caps.wVoices; i++) {
                    if (voice[i].channel == chn) {
                        SEQ_BENDER(wDevID, i, channel[chn].bender);
                    }
                }
                break;
            case MIDI_SYSTEM_PREFIX:
                switch (evt & 0x0F) {
                case 0x0F:      /* Reset */
                    modFMReset(wDevID);
                    break;
                default:
                    WARN("Unsupported (yet) system event %02x\n", evt & 0x0F);
                }
                break;
            default:
                WARN("Internal error, shouldn't happen (event=%08x)\n", evt & 0xF0);
                return MMSYSERR_NOTENABLED;
            }
        }
        break;
    case MOD_MIDIPORT:
        {
            int dev = wDevID - MODM_NumFMSynthDevs;
            if (dev < 0) {
                WARN("Internal error on devID (%u) !\n", wDevID);
                return MIDIERR_NODEVICE;
            }

            switch (evt & 0xF0) {
            case MIDI_NOTEOFF:
            case MIDI_NOTEON:
            case MIDI_KEY_PRESSURE:
            case MIDI_CTL_CHANGE:
            case MIDI_PITCH_BEND:
                SEQ_MIDIOUT(dev, evt);
                SEQ_MIDIOUT(dev, d1);
                SEQ_MIDIOUT(dev, d2);
                break;
            case MIDI_PGM_CHANGE:
            case MIDI_CHN_PRESSURE:
                SEQ_MIDIOUT(dev, evt);
                SEQ_MIDIOUT(dev, d1);
                break;
            case MIDI_SYSTEM_PREFIX:
                switch (evt & 0x0F) {
                case 0x00:      /* System Exclusive, don't do it on modData,
                                 * should require modLongData*/
                case 0x01:      /* Undefined */
                case 0x04:      /* Undefined. */
                case 0x05:      /* Undefined. */
                case 0x07:      /* End of Exclusive. */
                case 0x09:      /* Undefined. */
                case 0x0D:      /* Undefined. */
                    break;
                case 0x06:      /* Tune Request */
                case 0x08:      /* Timing Clock. */
                case 0x0A:      /* Start. */
                case 0x0B:      /* Continue */
                case 0x0C:      /* Stop */
                case 0x0E:      /* Active Sensing. */
                    SEQ_MIDIOUT(dev, evt);
                    break;
                case 0x0F:      /* Reset */
                                /* SEQ_MIDIOUT(dev, evt);
                                   this other way may be better */
                    SEQ_MIDIOUT(dev, MIDI_SYSTEM_PREFIX);
                    SEQ_MIDIOUT(dev, 0x7e);
                    SEQ_MIDIOUT(dev, 0x7f);
                    SEQ_MIDIOUT(dev, 0x09);
                    SEQ_MIDIOUT(dev, 0x01);
                    SEQ_MIDIOUT(dev, 0xf7);
                    break;
                case 0x03:      /* Song Select. */
                    SEQ_MIDIOUT(dev, evt);
                    SEQ_MIDIOUT(dev, d1);
                case 0x02:      /* Song Position Pointer. */
                    SEQ_MIDIOUT(dev, evt);
                    SEQ_MIDIOUT(dev, d1);
                    SEQ_MIDIOUT(dev, d2);
                }
                break;
            }
        }
        break;
    default:
        WARN("Technology not supported (yet) %d !\n",
             MidiOutDev[wDevID].caps.wTechnology);
        return MMSYSERR_NOTENABLED;
    }

    SEQ_DUMPBUF();

    return MMSYSERR_NOERROR;
}

/**************************************************************************
 *              modLongData                                     [internal]
 */
static DWORD modLongData(WORD wDevID, LPMIDIHDR lpMidiHdr, DWORD dwSize)
{
    int         count;
    LPBYTE      lpData;

    TRACE("(%04X, %p, %08lX);\n", wDevID, lpMidiHdr, dwSize);

    /* Note: MS doc does not say much about the dwBytesRecorded member of the MIDIHDR structure
     * but it seems to be used only for midi input.
     * Taking a look at the WAVEHDR structure (which is quite similar) confirms this assumption.
     */
    
    if (wDevID >= MODM_NumDevs) return MMSYSERR_BADDEVICEID;
    if (!MidiOutDev[wDevID].bEnabled) return MIDIERR_NODEVICE;

    if (midiSeqFD == -1) {
        WARN("can't play !\n");
        return MIDIERR_NODEVICE;
    }

    lpData = lpMidiHdr->lpData;

    if (lpData == NULL)
        return MIDIERR_UNPREPARED;
    if (!(lpMidiHdr->dwFlags & MHDR_PREPARED))
        return MIDIERR_UNPREPARED;
    if (lpMidiHdr->dwFlags & MHDR_INQUEUE)
        return MIDIERR_STILLPLAYING;
    lpMidiHdr->dwFlags &= ~MHDR_DONE;
    lpMidiHdr->dwFlags |= MHDR_INQUEUE;

    /* FIXME: MS doc is not 100% clear. Will lpData only contain system exclusive
     * data, or can it also contain raw MIDI data, to be split up and sent to
     * modShortData() ?
     * If the latest is true, then the following WARNing will fire up
     */
    if (lpData[0] != 0xF0 || lpData[lpMidiHdr->dwBufferLength - 1] != 0xF7) {
        WARN("Alledged system exclusive buffer is not correct\n\tPlease report with MIDI file\n");
    }

    TRACE("dwBufferLength=%lu !\n", lpMidiHdr->dwBufferLength);
    TRACE("                 %02X %02X %02X ... %02X %02X %02X\n",
          lpData[0], lpData[1], lpData[2], lpData[lpMidiHdr->dwBufferLength-3],
          lpData[lpMidiHdr->dwBufferLength-2], lpData[lpMidiHdr->dwBufferLength-1]);

    switch (MidiOutDev[wDevID].caps.wTechnology) {
    case MOD_FMSYNTH:
        /* FIXME: I don't think there is much to do here */
        break;
    case MOD_MIDIPORT:
        if (lpData[0] != 0xF0) {
            /* Send end of System Exclusive */
            SEQ_MIDIOUT(wDevID - MODM_NumFMSynthDevs, 0xF0);
            WARN("Adding missing 0xF0 marker at the beginning of "
                 "system exclusive byte stream\n");
        }
        for (count = 0; count < lpMidiHdr->dwBufferLength; count++) {
            SEQ_MIDIOUT(wDevID - MODM_NumFMSynthDevs, lpData[count]);
        }
        if (lpData[count - 1] != 0xF7) {
            /* Send end of System Exclusive */
            SEQ_MIDIOUT(wDevID - MODM_NumFMSynthDevs, 0xF7);
            WARN("Adding missing 0xF7 marker at the end of "
                 "system exclusive byte stream\n");
        }
        SEQ_DUMPBUF();
        break;
    default:
        WARN("Technology not supported (yet) %d !\n",
             MidiOutDev[wDevID].caps.wTechnology);
        return MMSYSERR_NOTENABLED;
    }

    lpMidiHdr->dwFlags &= ~MHDR_INQUEUE;
    lpMidiHdr->dwFlags |= MHDR_DONE;
    if (MIDI_NotifyClient(wDevID, MOM_DONE, (DWORD)lpMidiHdr, 0L) != MMSYSERR_NOERROR) {
        WARN("can't notify client !\n");
        return MMSYSERR_INVALPARAM;
    }
    return MMSYSERR_NOERROR;
}

/**************************************************************************
 *                      modPrepare                              [internal]
 */
static DWORD modPrepare(WORD wDevID, LPMIDIHDR lpMidiHdr, DWORD dwSize)
{
    TRACE("(%04X, %p, %08lX);\n", wDevID, lpMidiHdr, dwSize);

    if (midiSeqFD == -1) {
        WARN("can't prepare !\n");
        return MMSYSERR_NOTENABLED;
    }

    /* MS doc says that dwFlags must be set to zero, but (kinda funny) MS mciseq drivers
     * asks to prepare MIDIHDR which dwFlags != 0.
     * So at least check for the inqueue flag
     */
    if (dwSize < sizeof(MIDIHDR) || lpMidiHdr == 0 ||
        lpMidiHdr->lpData == 0 || (lpMidiHdr->dwFlags & MHDR_INQUEUE) != 0 ||
        lpMidiHdr->dwBufferLength >= 0x10000ul) {
        WARN("%p %p %08lx %d/%ld\n", lpMidiHdr, lpMidiHdr->lpData,
                   lpMidiHdr->dwFlags, sizeof(MIDIHDR), dwSize);
        return MMSYSERR_INVALPARAM;
    }

    lpMidiHdr->lpNext = 0;
    lpMidiHdr->dwFlags |= MHDR_PREPARED;
    lpMidiHdr->dwFlags &= ~MHDR_DONE;
    return MMSYSERR_NOERROR;
}

/**************************************************************************
 *                              modUnprepare                    [internal]
 */
static DWORD modUnprepare(WORD wDevID, LPMIDIHDR lpMidiHdr, DWORD dwSize)
{
    TRACE("(%04X, %p, %08lX);\n", wDevID, lpMidiHdr, dwSize);

    if (midiSeqFD == -1) {
        WARN("can't unprepare !\n");
        return MMSYSERR_NOTENABLED;
    }

    if (dwSize < sizeof(MIDIHDR) || lpMidiHdr == 0)
        return MMSYSERR_INVALPARAM;
    if (lpMidiHdr->dwFlags & MHDR_INQUEUE)
        return MIDIERR_STILLPLAYING;
    lpMidiHdr->dwFlags &= ~MHDR_PREPARED;
    return MMSYSERR_NOERROR;
}

/**************************************************************************
 *                      modReset                                [internal]
 */
static DWORD modReset(WORD wDevID)
{
    unsigned chn;

    TRACE("(%04X);\n", wDevID);

    if (wDevID >= MODM_NumDevs) return MMSYSERR_BADDEVICEID;
    if (!MidiOutDev[wDevID].bEnabled) return MIDIERR_NODEVICE;

    /* stop all notes */
    /* FIXME: check if 0x78B0 is channel dependent or not. I coded it so that
     * it's channel dependent...
     */
    for (chn = 0; chn < 16; chn++) {
        /* turn off every note */
        modData(wDevID, 0x7800 | MIDI_CTL_CHANGE | chn);
        /* remove sustain on all channels */
        modData(wDevID, (CTL_SUSTAIN << 8) | MIDI_CTL_CHANGE | chn);
    }
    /* FIXME: the LongData buffers must also be returned to the app */
    return MMSYSERR_NOERROR;
}

#endif /* HAVE_OSS_MIDI */

/*======================================================================*
 *                          MIDI entry points                           *
 *======================================================================*/

/**************************************************************************
 *                      midMessage (WINEOSS.4)
 */
DWORD WINAPI OSS_midMessage(UINT wDevID, UINT wMsg, DWORD dwUser,
                            DWORD dwParam1, DWORD dwParam2)
{
    TRACE("(%04X, %04X, %08lX, %08lX, %08lX);\n",
          wDevID, wMsg, dwUser, dwParam1, dwParam2);
    switch (wMsg) {
#ifdef HAVE_OSS_MIDI
    case DRVM_INIT:
    case DRVM_EXIT:
    case DRVM_ENABLE:
    case DRVM_DISABLE:
        /* FIXME: Pretend this is supported */
        return 0;
    case MIDM_OPEN:
        return midOpen(wDevID, (LPMIDIOPENDESC)dwParam1, dwParam2);
    case MIDM_CLOSE:
        return midClose(wDevID);
    case MIDM_ADDBUFFER:
        return midAddBuffer(wDevID, (LPMIDIHDR)dwParam1, dwParam2);
    case MIDM_PREPARE:
        return midPrepare(wDevID, (LPMIDIHDR)dwParam1, dwParam2);
    case MIDM_UNPREPARE:
        return midUnprepare(wDevID, (LPMIDIHDR)dwParam1, dwParam2);
    case MIDM_GETDEVCAPS:
        return midGetDevCaps(wDevID, (LPMIDIINCAPSW)dwParam1,dwParam2);
    case MIDM_GETNUMDEVS:
        return MIDM_NumDevs;
    case MIDM_RESET:
        return midReset(wDevID);
    case MIDM_START:
        return midStart(wDevID);
    case MIDM_STOP:
        return midStop(wDevID);
#endif
    default:
        TRACE("Unsupported message\n");
    }
    return MMSYSERR_NOTSUPPORTED;
}

/**************************************************************************
 *                              modMessage (WINEOSS.5)
 */
DWORD WINAPI OSS_modMessage(UINT wDevID, UINT wMsg, DWORD dwUser,
                            DWORD dwParam1, DWORD dwParam2)
{
    TRACE("(%04X, %04X, %08lX, %08lX, %08lX);\n",
          wDevID, wMsg, dwUser, dwParam1, dwParam2);

    switch (wMsg) {
#ifdef HAVE_OSS_MIDI
    case DRVM_INIT:
    case DRVM_EXIT:
    case DRVM_ENABLE:
    case DRVM_DISABLE:
        /* FIXME: Pretend this is supported */
        return 0;
    case MODM_OPEN:
        return modOpen(wDevID, (LPMIDIOPENDESC)dwParam1, dwParam2);
    case MODM_CLOSE:
        return modClose(wDevID);
    case MODM_DATA:
        return modData(wDevID, dwParam1);
    case MODM_LONGDATA:
        return modLongData(wDevID, (LPMIDIHDR)dwParam1, dwParam2);
    case MODM_PREPARE:
        return modPrepare(wDevID, (LPMIDIHDR)dwParam1, dwParam2);
    case MODM_UNPREPARE:
        return modUnprepare(wDevID, (LPMIDIHDR)dwParam1, dwParam2);
    case MODM_GETDEVCAPS:
        return modGetDevCaps(wDevID, (LPMIDIOUTCAPSW)dwParam1, dwParam2);
    case MODM_GETNUMDEVS:
        return MODM_NumDevs;
    case MODM_GETVOLUME:
        return 0;
    case MODM_SETVOLUME:
        return 0;
    case MODM_RESET:
        return modReset(wDevID);
#endif
    default:
        TRACE("Unsupported message\n");
    }
    return MMSYSERR_NOTSUPPORTED;
}

/*-----------------------------------------------------------------------*/