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midi.c

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

/*
 * Sample MIDI Wine Driver for ALSA (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       split in midi.c and mcimidi.c
 * Copyright 2003      Christian Costa :
 *                     ALSA port
 *
 * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
 *
 * TODO: Finish midi record
 *
 */

#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>

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

WINE_DEFAULT_DEBUG_CHANNEL(midi);

#ifdef HAVE_ALSA

#ifndef SND_SEQ_PORT_TYPE_PORT
#define SND_SEQ_PORT_TYPE_PORT (1<<19)  /* Appears in version 1.0.12rc1 */
#endif

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;
    snd_seq_addr_t      addr;
} 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;
    snd_seq_addr_t      addr;
} 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 total number of MIDI out devices found */
static      int         MIDM_NumDevs = 0;

static      snd_seq_t*      midiSeq = NULL;
static      int         numOpenMidiSeq = 0;
static      int         numStartedMidiIn = 0;

static int port_in;
static int port_out;

static CRITICAL_SECTION crit_sect;   /* protects all MidiIn buffer queues */
static CRITICAL_SECTION_DEBUG critsect_debug =
{
    0, 0, &crit_sect,
    { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
      0, 0, { (DWORD_PTR)(__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(int);
static int midiCloseSeq(void);

#if 0 /* Debug Purpose */
static void error_handler(const char* file, int line, const char* function, int err, const char* fmt, ...)
{
    va_list arg;
    if (err == ENOENT)
        return;
    va_start(arg, fmt);
    fprintf(stderr, "ALSA lib %s:%i:(%s) ", file, line, function);
    vfprintf(stderr, fmt, arg);
    if (err)
        fprintf(stderr, ": %s", snd_strerror(err));
    putc('\n', stderr);
    va_end(arg);
}
#endif

/**************************************************************************
 *                MIDI_unixToWindowsDeviceType              [internal]
 *
 * return the Windows equivalent to a Unix Device Type
 *
 */
static      int   MIDI_AlsaToWindowsDeviceType(unsigned 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 ALSA to
       Windows Sound type */

    if (type & SND_SEQ_PORT_TYPE_SYNTH)
        return MOD_FMSYNTH;

    if (type & (SND_SEQ_PORT_TYPE_DIRECT_SAMPLE|SND_SEQ_PORT_TYPE_SAMPLE))
        return MOD_SYNTH;

    if (type & (SND_SEQ_PORT_TYPE_MIDI_GENERIC|SND_SEQ_PORT_TYPE_APPLICATION))
        return MOD_MIDIPORT;
    
    ERR("Cannot determine the type (alsa type is %x) of this midi device. Assuming FM Synth\n", type);
    return MOD_FMSYNTH;
}

/**************************************************************************
 *                MIDI_NotifyClient             [internal]
 */
static DWORD MIDI_NotifyClient(UINT wDevID, WORD wMsg,
                         DWORD_PTR dwParam1, DWORD_PTR 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(int create_client)
{
    if (numOpenMidiSeq == 0) {
      if (snd_seq_open(&midiSeq, "default", SND_SEQ_OPEN_DUPLEX, 0) < 0)
        {
          if (midi_warn)
          {
            WARN("Error opening ALSA sequencer.\n");
          }
          midi_warn = 0;
          return -1;
      }

      if (create_client) {
          /* Setting the client name is the only init to do */
          snd_seq_set_client_name(midiSeq, "WINE midi driver");

#if 0 /* FIXME: Is it possible to use a port for READ & WRITE ops */
            port_in = port_out = snd_seq_create_simple_port(midiSeq, "WINE ALSA Input/Output", SND_SEQ_PORT_CAP_READ|SND_SEQ_PORT_CAP_WRITE,
                                                                         SND_SEQ_PORT_TYPE_APPLICATION);
            if (port_out < 0)
               TRACE("Unable to create output port\n");
            else
             TRACE("Outport port created successfully (%d)\n", port_out);
#else
            port_out = snd_seq_create_simple_port(midiSeq, "WINE ALSA Output", SND_SEQ_PORT_CAP_READ,
                                                                         SND_SEQ_PORT_TYPE_APPLICATION);
          if (port_out < 0)
            TRACE("Unable to create output port\n");
          else
            TRACE("Outport port created successfully (%d)\n", port_out);

          port_in = snd_seq_create_simple_port(midiSeq, "WINE ALSA Input", SND_SEQ_PORT_CAP_WRITE,
                                                                       SND_SEQ_PORT_TYPE_APPLICATION);
            if (port_in < 0)
                TRACE("Unable to create input port\n");
            else
              TRACE("Input port created successfully (%d)\n", port_in);
#endif
       }
    }
    numOpenMidiSeq++;
    return 0;
}

/**************************************************************************
 *                midiCloseSeq                        [internal]
 */
static int midiCloseSeq(void)
{
    if (--numOpenMidiSeq == 0) {
      snd_seq_delete_simple_port(midiSeq, port_out);
      snd_seq_delete_simple_port(midiSeq, port_in);
      snd_seq_close(midiSeq);
      midiSeq = NULL;
    }
    return 0;
}

static DWORD WINAPI midRecThread(LPVOID arg)
{
    int npfd;
    struct pollfd *pfd;

    TRACE("Thread startup\n");

    while(!end_thread) {
      TRACE("Thread loop\n");
      npfd = snd_seq_poll_descriptors_count(midiSeq, POLLIN);
      pfd = HeapAlloc(GetProcessHeap(), 0, npfd * sizeof(struct pollfd));
      snd_seq_poll_descriptors(midiSeq, pfd, npfd, POLLIN);

      /* Check if an event is present */
      if (poll(pfd, npfd, 250) < 0) {
          HeapFree(GetProcessHeap(), 0, pfd);
          continue;
      }

      /* Note: This definitely does not work.  
       * while(snd_seq_event_input_pending(midiSeq, 0) > 0) {
             snd_seq_event_t* ev;
             snd_seq_event_input(midiSeq, &ev);
             ....................
             snd_seq_free_event(ev);
         }*/

      do {
          WORD wDevID;
          snd_seq_event_t* ev;
          snd_seq_event_input(midiSeq, &ev);
          /* Find the target device */
          for (wDevID = 0; wDevID < MIDM_NumDevs; wDevID++)
            if ( (ev->source.client == MidiInDev[wDevID].addr.client) && (ev->source.port == MidiInDev[wDevID].addr.port) )
                break;
          if ((wDevID == MIDM_NumDevs) || (MidiInDev[wDevID].state != 1))
            FIXME("Unexpected event received, type = %x from %d:%d\n", ev->type, ev->source.client, ev->source.port);
          else {
            DWORD dwTime, toSend = 0;
            int value = 0;
            /* FIXME: Should use ev->time instead for better accuracy */
            dwTime = GetTickCount() - MidiInDev[wDevID].startTime;
            TRACE("Event received, type = %x, device = %d\n", ev->type, wDevID);
            switch(ev->type)
            {
            case SND_SEQ_EVENT_NOTEOFF:
                toSend = (ev->data.note.velocity << 16) | (ev->data.note.note << 8) | MIDI_CMD_NOTE_OFF | ev->data.control.channel;
                break;
            case SND_SEQ_EVENT_NOTEON:
                toSend = (ev->data.note.velocity << 16) | (ev->data.note.note << 8) | MIDI_CMD_NOTE_ON | ev->data.control.channel;
                break;
            case SND_SEQ_EVENT_KEYPRESS:
                toSend = (ev->data.note.velocity << 16) | (ev->data.note.note << 8) | MIDI_CMD_NOTE_PRESSURE | ev->data.control.channel;
                break;
            case SND_SEQ_EVENT_CONTROLLER: 
                toSend = (ev->data.control.value << 16) | (ev->data.control.param << 8) | MIDI_CMD_CONTROL | ev->data.control.channel;
                break;
            case SND_SEQ_EVENT_PITCHBEND:
                value = ev->data.control.value + 0x2000;
                toSend = (((value >> 7) & 0x7f) << 16) | ((value & 0x7f) << 8) | MIDI_CMD_BENDER | ev->data.control.channel;
                break;
            case SND_SEQ_EVENT_PGMCHANGE:
                toSend = ((ev->data.control.value & 0x7f) << 8) | MIDI_CMD_PGM_CHANGE | ev->data.control.channel;
                break;
            case SND_SEQ_EVENT_CHANPRESS:
                toSend = ((ev->data.control.value & 0x7f) << 8) | MIDI_CMD_CHANNEL_PRESSURE | ev->data.control.channel;
                break;
                case SND_SEQ_EVENT_CLOCK:
                    toSend = 0xF8;
                    break;
                case SND_SEQ_EVENT_START:
                    toSend = 0xFA;
                    break;
                case SND_SEQ_EVENT_CONTINUE:
                    toSend = 0xFB;
                    break;
                case SND_SEQ_EVENT_STOP:
                    toSend = 0xFC;
                    break;
                case SND_SEQ_EVENT_SONGPOS:
                    toSend = (((ev->data.control.value >> 7) & 0x7f) << 16) | ((ev->data.control.value & 0x7f) << 8) | 0xF2;
                    break;
                case SND_SEQ_EVENT_SONGSEL:
                  toSend = ((ev->data.control.value & 0x7f) << 8) | 0xF3;
                    break;
                case SND_SEQ_EVENT_RESET:
                    toSend = 0xFF;
                    break;
            case SND_SEQ_EVENT_SYSEX:
                {
                  int pos = 0;
                  int len = ev->data.ext.len;
                        LPBYTE ptr = ev->data.ext.ptr;
                  LPMIDIHDR lpMidiHdr;

                  EnterCriticalSection(&crit_sect);
                  while (len) {
                      if ((lpMidiHdr = MidiInDev[wDevID].lpQueueHdr) != NULL) {
                        int copylen = min(len, lpMidiHdr->dwBufferLength - lpMidiHdr->dwBytesRecorded);
                        memcpy(lpMidiHdr->lpData + lpMidiHdr->dwBytesRecorded, ptr + pos, copylen);
                        lpMidiHdr->dwBytesRecorded += copylen;
                        len -= copylen;
                        pos += copylen;
                        /* We check if we reach the end of buffer or the end of sysex before notifying
                         * to handle the case where ALSA split the sysex into several events */
                        if ((lpMidiHdr->dwBytesRecorded == lpMidiHdr->dwBufferLength) ||
                            (*(BYTE*)(lpMidiHdr->lpData + lpMidiHdr->dwBytesRecorded - 1) == 0xF7)) {
                            lpMidiHdr->dwFlags &= ~MHDR_INQUEUE;
                            lpMidiHdr->dwFlags |= MHDR_DONE;
                                    MidiInDev[wDevID].lpQueueHdr = lpMidiHdr->lpNext;
                            if (MIDI_NotifyClient(wDevID, MIM_LONGDATA, (DWORD_PTR)lpMidiHdr, dwTime) != MMSYSERR_NOERROR)
                              WARN("Couldn't notify client\n");
                        }
                      } else {
                        FIXME("Sysex data received but no buffer to store it!\n");
                        break;
                      }
                  }
                  LeaveCriticalSection(&crit_sect);
                }
                break;
            case SND_SEQ_EVENT_SENSING:
                /* Noting to do */
                break;
            default:
                FIXME("Unhandled event received, type = %x\n", ev->type);
                break;
            }
            if (toSend != 0) {
                    TRACE("Sending event %08x (from %d %d)\n", toSend, ev->source.client, ev->source.port);
                if (MIDI_NotifyClient(wDevID, MIM_DATA, toSend, dwTime) != MMSYSERR_NOERROR) {
                  WARN("Couldn't notify client\n");
                }
            }
          }
          snd_seq_free_event(ev);
      } while(snd_seq_event_input_pending(midiSeq, 0) > 0);
      
      HeapFree(GetProcessHeap(), 0, pfd);
    }
    return 0;
}

/**************************************************************************
 *                      midGetDevCaps                 [internal]
 */
static DWORD midGetDevCaps(WORD wDevID, LPMIDIINCAPSW lpCaps, DWORD dwSize)
{
    TRACE("(%04X, %p, %08X);\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, %08X);\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(1) < 0) {
      return MMSYSERR_ERROR;
    }

    /* Connect our app port to the device port */
    if (snd_seq_connect_from(midiSeq, port_in, MidiInDev[wDevID].addr.client, MidiInDev[wDevID].addr.port) < 0)
      return MMSYSERR_NOTENABLED;

    TRACE("input port connected %d %d %d\n",port_in,MidiInDev[wDevID].addr.client,MidiInDev[wDevID].addr.port);

    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 (midiSeq == NULL) {
      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");
    }

    snd_seq_disconnect_from(midiSeq, port_in, MidiInDev[wDevID].addr.client, MidiInDev[wDevID].addr.port);
    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, %08X);\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);
    lpMidiHdr->dwFlags &= ~WHDR_DONE;
    lpMidiHdr->dwFlags |= MHDR_INQUEUE;
    lpMidiHdr->dwBytesRecorded = 0;
    lpMidiHdr->lpNext = 0;
    if (MidiInDev[wDevID].lpQueueHdr == 0) {
      MidiInDev[wDevID].lpQueueHdr = lpMidiHdr;
    } else {
      LPMIDIHDR   ptr;

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

    return MMSYSERR_NOERROR;
}

/**************************************************************************
 *                      midPrepare              [internal]
 */
static DWORD midPrepare(WORD wDevID, LPMIDIHDR lpMidiHdr, DWORD dwSize)
{
    TRACE("(%04X, %p, %08X);\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, %08X);\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_PTR)MidiInDev[wDevID].lpQueueHdr, dwTime) != MMSYSERR_NOERROR) {
          WARN("Couldn't notify client\n");
      }
        MidiInDev[wDevID].lpQueueHdr = 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;
}

/**************************************************************************
 *                      modGetDevCaps                 [internal]
 */
static DWORD modGetDevCaps(WORD wDevID, LPMIDIOUTCAPSW lpCaps, DWORD dwSize)
{
    TRACE("(%04X, %p, %08X);\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, %08X);\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:
    case MOD_MIDIPORT:
    case MOD_SYNTH:
      if (midiOpenSeq(1) < 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;

    /* Connect our app port to the device port */
    if (snd_seq_connect_to(midiSeq, port_out, MidiOutDev[wDevID].addr.client, MidiOutDev[wDevID].addr.port) < 0)
      return MMSYSERR_NOTENABLED;
    
    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 (midiSeq == NULL) {
      WARN("can't close !\n");
      return MMSYSERR_ERROR;
    }

    switch (MidiOutDev[wDevID].caps.wTechnology) {
    case MOD_FMSYNTH:
    case MOD_MIDIPORT:
    case MOD_SYNTH:
        snd_seq_disconnect_to(midiSeq, port_out, MidiOutDev[wDevID].addr.client, MidiOutDev[wDevID].addr.port);
      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)
{
    BYTE    evt = LOBYTE(LOWORD(dwParam));
    BYTE    d1  = HIBYTE(LOWORD(dwParam));
    BYTE    d2  = LOBYTE(HIWORD(dwParam));
    
    TRACE("(%04X, %08X);\n", wDevID, dwParam);

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

    if (midiSeq == NULL) {
      WARN("can't play !\n");
      return MIDIERR_NODEVICE;
    }
    switch (MidiOutDev[wDevID].caps.wTechnology) {
    case MOD_SYNTH:
    case MOD_MIDIPORT:
      {
          int handled = 1; /* Assume event is handled */
            snd_seq_event_t event;
            snd_seq_ev_clear(&event);
            snd_seq_ev_set_direct(&event);
            snd_seq_ev_set_source(&event, port_out);
            snd_seq_ev_set_dest(&event, MidiOutDev[wDevID].addr.client, MidiOutDev[wDevID].addr.port);
          
          switch (evt & 0xF0) {
          case MIDI_CMD_NOTE_OFF:
            snd_seq_ev_set_noteoff(&event, evt&0x0F, d1, d2);
            break;
          case MIDI_CMD_NOTE_ON:
            snd_seq_ev_set_noteon(&event, evt&0x0F, d1, d2);
            break;
          case MIDI_CMD_NOTE_PRESSURE:
            snd_seq_ev_set_keypress(&event, evt&0x0F, d1, d2);
            break;
          case MIDI_CMD_CONTROL:
            snd_seq_ev_set_controller(&event, evt&0x0F, d1, d2);
            break;
          case MIDI_CMD_BENDER:
            snd_seq_ev_set_pitchbend(&event, evt&0x0F, ((WORD)d2 << 7 | (WORD)d1) - 0x2000);
            break;
          case MIDI_CMD_PGM_CHANGE:
            snd_seq_ev_set_pgmchange(&event, evt&0x0F, d1);
            break;
          case MIDI_CMD_CHANNEL_PRESSURE:
            snd_seq_ev_set_chanpress(&event, evt&0x0F, d1);
            break;
          case MIDI_CMD_COMMON_SYSEX:
            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. */
                handled = 0;
                break;
            case 0x06:  /* Tune Request */
            case 0x08:  /* Timing Clock. */
            case 0x0A:  /* Start. */
            case 0x0B:  /* Continue */
            case 0x0C:  /* Stop */
            case 0x0E:  /* Active Sensing. */
                /* FIXME: Is this function suitable for these purposes
                   (and also Song Select and Song Position Pointer) */
                  snd_seq_ev_set_sysex(&event, 1, &evt);
                break;
            case 0x0F:  /* Reset */
                        /* snd_seq_ev_set_sysex(&event, 1, &evt);
                           this other way may be better */
                {
                  BYTE reset_sysex_seq[] = {MIDI_CMD_COMMON_SYSEX, 0x7e, 0x7f, 0x09, 0x01, 0xf7};
                  snd_seq_ev_set_sysex(&event, sizeof(reset_sysex_seq), reset_sysex_seq);
                }
                break;
            case 0x03:  /* Song Select. */
                {
                  BYTE buf[2];
                  buf[0] = evt;
                  buf[1] = d1;
                  snd_seq_ev_set_sysex(&event, sizeof(buf), buf);
                  }
                  break;
            case 0x02:  /* Song Position Pointer. */
                {
                  BYTE buf[3];
                  buf[0] = evt;
                  buf[1] = d1;
                  buf[2] = d2;
                  snd_seq_ev_set_sysex(&event, sizeof(buf), buf);
                  }
                break;
            }
            break;
          }
          if (handled)
                snd_seq_event_output_direct(midiSeq, &event);
      }
      break;
    default:
      WARN("Technology not supported (yet) %d !\n",
           MidiOutDev[wDevID].caps.wTechnology);
      return MMSYSERR_NOTENABLED;
    }

    return MMSYSERR_NOERROR;
}

/**************************************************************************
 *          modLongData                         [internal]
 */
static DWORD modLongData(WORD wDevID, LPMIDIHDR lpMidiHdr, DWORD dwSize)
{
    int           len_add = 0;
    LPBYTE  lpData, lpNewData = NULL;
    snd_seq_event_t event;

    TRACE("(%04X, %p, %08X);\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 (midiSeq == NULL) {
      WARN("can't play !\n");
      return MIDIERR_NODEVICE;
    }

    lpData = (LPBYTE) 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("Alleged system exclusive buffer is not correct\n\tPlease report with MIDI file\n");
      lpNewData = HeapAlloc(GetProcessHeap(), 0, lpMidiHdr->dwBufferLength + 2);
    }

    TRACE("dwBufferLength=%u !\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 start of System Exclusive */
          len_add = 1;
          lpData[0] = 0xF0;
          memcpy(lpNewData, lpData, lpMidiHdr->dwBufferLength);
          WARN("Adding missing 0xF0 marker at the beginning of "
             "system exclusive byte stream\n");
      }
      if (lpData[lpMidiHdr->dwBufferLength-1] != 0xF7) {
          /* Send end of System Exclusive */
          memcpy(lpData + len_add, lpData, lpMidiHdr->dwBufferLength);
            lpNewData[lpMidiHdr->dwBufferLength + len_add - 1] = 0xF0;
          len_add++;
          WARN("Adding missing 0xF7 marker at the end of "
             "system exclusive byte stream\n");
      }
      snd_seq_ev_clear(&event);
      snd_seq_ev_set_direct(&event);
      snd_seq_ev_set_source(&event, port_out);
      snd_seq_ev_set_dest(&event, MidiOutDev[wDevID].addr.client, MidiOutDev[wDevID].addr.port);
      TRACE("client = %d port = %d\n", MidiOutDev[wDevID].addr.client, MidiOutDev[wDevID].addr.port);
      snd_seq_ev_set_sysex(&event, lpMidiHdr->dwBufferLength + len_add, lpNewData ? lpNewData : lpData);
      snd_seq_event_output_direct(midiSeq, &event);
      if (lpNewData)
            HeapFree(GetProcessHeap(), 0, lpData);
      break;
    default:
      WARN("Technology not supported (yet) %d !\n",
           MidiOutDev[wDevID].caps.wTechnology);
      HeapFree(GetProcessHeap(), 0, lpNewData);
      return MMSYSERR_NOTENABLED;
    }

    lpMidiHdr->dwFlags &= ~MHDR_INQUEUE;
    lpMidiHdr->dwFlags |= MHDR_DONE;
    if (MIDI_NotifyClient(wDevID, MOM_DONE, (DWORD_PTR)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, %08X);\n", wDevID, lpMidiHdr, dwSize);

    if (midiSeq == NULL) {
      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 %08x %d\n", lpMidiHdr, lpMidiHdr ? lpMidiHdr->lpData : NULL,
             lpMidiHdr ? lpMidiHdr->dwFlags : 0, 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, %08X);\n", wDevID, lpMidiHdr, dwSize);

    if (midiSeq == NULL) {
      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_CMD_CONTROL | chn);
      /* remove sustain on all channels */
      modData(wDevID, (MIDI_CTL_SUSTAIN << 8) | MIDI_CMD_CONTROL | chn);
    }
    /* FIXME: the LongData buffers must also be returned to the app */
    return MMSYSERR_NOERROR;
}


/**************************************************************************
 *                      ALSA_AddMidiPort              [internal]
 *
 * Helper for ALSA_MidiInit
 */
static void ALSA_AddMidiPort(snd_seq_client_info_t* cinfo, snd_seq_port_info_t* pinfo, unsigned int cap, unsigned int type)
{
    char midiPortName[MAXPNAMELEN];

    if (cap & SND_SEQ_PORT_CAP_WRITE) {
      TRACE("OUT (%d:%s:%s:%d:%s:%x)\n",snd_seq_client_info_get_client(cinfo),
                                snd_seq_client_info_get_name(cinfo),
                                snd_seq_client_info_get_type(cinfo) == SND_SEQ_USER_CLIENT ? "user" : "kernel",
                                snd_seq_port_info_get_port(pinfo),
                                snd_seq_port_info_get_name(pinfo),
                                type);
            
      if (MODM_NumDevs >= MAX_MIDIOUTDRV)
          return;
      if (!type)
            return;

      MidiOutDev[MODM_NumDevs].addr = *snd_seq_port_info_get_addr(pinfo);

      /* 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[MODM_NumDevs].caps.wMid = 0x00FF;
      MidiOutDev[MODM_NumDevs].caps.wPid = 0x0001;    /* FIXME Product ID  */
      /* Product Version. We simply say "1" */
      MidiOutDev[MODM_NumDevs].caps.vDriverVersion = 0x001;
      MidiOutDev[MODM_NumDevs].caps.wChannelMask   = 0xFFFF;

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

      /* Try to use both client and port names, if this is too long take the port name only.
           In the second case the port name should be explicit enough due to its big size.
       */
      if ( (strlen(snd_seq_client_info_get_name(cinfo)) + strlen(snd_seq_port_info_get_name(pinfo)) + 3) < MAXPNAMELEN ) {
          sprintf(midiPortName, "%s - %s", snd_seq_client_info_get_name(cinfo), snd_seq_port_info_get_name(pinfo));
      } else {
          lstrcpynA(midiPortName, snd_seq_port_info_get_name(pinfo), MAXPNAMELEN-1);
          midiPortName[MAXPNAMELEN-1] = 0;
      }
      MultiByteToWideChar(CP_UNIXCP, 0, midiPortName, -1,
                            MidiOutDev[MODM_NumDevs].caps.szPname,
                            sizeof(MidiOutDev[MODM_NumDevs].caps.szPname) / sizeof(WCHAR));

      MidiOutDev[MODM_NumDevs].caps.wTechnology = MIDI_AlsaToWindowsDeviceType(type);
      MidiOutDev[MODM_NumDevs].caps.wVoices     = 16;

        /* 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[MODM_NumDevs].caps.wNotes = 16;
      MidiOutDev[MODM_NumDevs].bEnabled    = TRUE;

      TRACE("MidiOut[%d]\tname='%s' techn=%d voices=%d notes=%d chnMsk=%04x support=%d\n"
            "\tALSA info: midi dev-type=%x, capa=0\n",
              MODM_NumDevs, wine_dbgstr_w(MidiOutDev[MODM_NumDevs].caps.szPname),
              MidiOutDev[MODM_NumDevs].caps.wTechnology,
              MidiOutDev[MODM_NumDevs].caps.wVoices, MidiOutDev[MODM_NumDevs].caps.wNotes,
              MidiOutDev[MODM_NumDevs].caps.wChannelMask, MidiOutDev[MODM_NumDevs].caps.dwSupport,
              type);
            
      MODM_NumDevs++;
    }
    if (cap & SND_SEQ_PORT_CAP_READ) {
        TRACE("IN  (%d:%s:%s:%d:%s:%x)\n",snd_seq_client_info_get_client(cinfo),
                                    snd_seq_client_info_get_name(cinfo),
                                snd_seq_client_info_get_type(cinfo) == SND_SEQ_USER_CLIENT ? "user" : "kernel",
                                snd_seq_port_info_get_port(pinfo),
                                snd_seq_port_info_get_name(pinfo),
                                type);
            
      if (MIDM_NumDevs >= MAX_MIDIINDRV)
          return;
      if (!type)
          return;

      MidiInDev[MIDM_NumDevs].addr = *snd_seq_port_info_get_addr(pinfo);

      /* 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[MIDM_NumDevs].caps.wMid = 0x00FF;
      MidiInDev[MIDM_NumDevs].caps.wPid = 0x0001;     /* FIXME Product ID  */
      /* Product Version. We simply say "1" */
      MidiInDev[MIDM_NumDevs].caps.vDriverVersion = 0x001;

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

      /* Try to use both client and port names, if this is too long take the port name only.
           In the second case the port name should be explicit enough due to its big size.
       */
      if ( (strlen(snd_seq_client_info_get_name(cinfo)) + strlen(snd_seq_port_info_get_name(pinfo)) + 3) < MAXPNAMELEN ) {
          sprintf(midiPortName, "%s - %s", snd_seq_client_info_get_name(cinfo), snd_seq_port_info_get_name(pinfo));
      } else {
          lstrcpynA(midiPortName, snd_seq_port_info_get_name(pinfo), MAXPNAMELEN-1);
          midiPortName[MAXPNAMELEN-1] = 0;
        }
      MultiByteToWideChar(CP_UNIXCP, 0, midiPortName, -1,
                            MidiInDev[MIDM_NumDevs].caps.szPname,
                            sizeof(MidiInDev[MIDM_NumDevs].caps.szPname) / sizeof(WCHAR));
      MidiInDev[MIDM_NumDevs].state = 0;

      TRACE("MidiIn [%d]\tname='%s' support=%d\n"
              "\tALSA info: midi dev-type=%x, capa=0\n",
              MIDM_NumDevs, wine_dbgstr_w(MidiInDev[MIDM_NumDevs].caps.szPname),
              MidiInDev[MIDM_NumDevs].caps.dwSupport,
              type);

      MIDM_NumDevs++;
    }
}

#endif /* HAVE_ALSA */


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

/**************************************************************************
 * ALSA_MidiInit                    [internal]
 *
 * Initializes the MIDI devices information variables
 */
LONG ALSA_MidiInit(void)
{
#ifdef HAVE_ALSA
    static  BOOL  bInitDone = FALSE;
    snd_seq_client_info_t *cinfo;
    snd_seq_port_info_t *pinfo;

    if (bInitDone)
      return TRUE;

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

    /* try to open device */
    if (midiOpenSeq(0) == -1) {
      return TRUE;
    }

#if 0 /* Debug purpose */
    snd_lib_error_set_handler(error_handler);
#endif
    cinfo = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, snd_seq_client_info_sizeof() );
    pinfo = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, snd_seq_port_info_sizeof() );

    /* First, search for all internal midi devices */
    snd_seq_client_info_set_client(cinfo, -1);
    while(snd_seq_query_next_client(midiSeq, cinfo) >= 0) {
        snd_seq_port_info_set_client(pinfo, snd_seq_client_info_get_client(cinfo));
      snd_seq_port_info_set_port(pinfo, -1);
      while (snd_seq_query_next_port(midiSeq, pinfo) >= 0) {
          unsigned int cap = snd_seq_port_info_get_capability(pinfo);
          unsigned int type = snd_seq_port_info_get_type(pinfo);
          if (!(type & SND_SEQ_PORT_TYPE_PORT))
              ALSA_AddMidiPort(cinfo, pinfo, cap, type);
      }
    }

    /* Second, search for all external ports */
    snd_seq_client_info_set_client(cinfo, -1);
    while(snd_seq_query_next_client(midiSeq, cinfo) >= 0) {
        snd_seq_port_info_set_client(pinfo, snd_seq_client_info_get_client(cinfo));
      snd_seq_port_info_set_port(pinfo, -1);
      while (snd_seq_query_next_port(midiSeq, pinfo) >= 0) {
          unsigned int cap = snd_seq_port_info_get_capability(pinfo);
          unsigned int type = snd_seq_port_info_get_type(pinfo);
          if (type & SND_SEQ_PORT_TYPE_PORT)
              ALSA_AddMidiPort(cinfo, pinfo, cap, type);
      }
    }

    /* close file and exit */
    midiCloseSeq();
    HeapFree( GetProcessHeap(), 0, cinfo );
    HeapFree( GetProcessHeap(), 0, pinfo );

    TRACE("End\n");
#endif
    return TRUE;
}

/**************************************************************************
 *                midMessage (WINEALSA.@)
 */
DWORD WINAPI ALSA_midMessage(UINT wDevID, UINT wMsg, DWORD_PTR dwUser,
                      DWORD_PTR dwParam1, DWORD_PTR dwParam2)
{
    TRACE("(%04X, %04X, %08lX, %08lX, %08lX);\n",
        wDevID, wMsg, dwUser, dwParam1, dwParam2);
    switch (wMsg) {
#ifdef HAVE_ALSA
    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 (WINEALSA.@)
 */
DWORD WINAPI ALSA_modMessage(UINT wDevID, UINT wMsg, DWORD_PTR dwUser,
                             DWORD_PTR dwParam1, DWORD_PTR dwParam2)
{
    TRACE("(%04X, %04X, %08lX, %08lX, %08lX);\n",
        wDevID, wMsg, dwUser, dwParam1, dwParam2);

    switch (wMsg) {
#ifdef HAVE_ALSA
    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;
}

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

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