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midimap.c

/*
 * Wine MIDI mapper driver
 *
 * Copyright      1999, 2000, 2001 Eric Pouech
 *
 * 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:
 *    notification has to be implemented
 *    IDF file loading
 */

#include <stdarg.h>
#include <string.h>
#include <stdlib.h>
#include "windef.h"
#include "winbase.h"
#include "wingdi.h"
#include "winuser.h"
#include "mmddk.h"
#include "winreg.h"
#include "wine/unicode.h"
#include "wine/debug.h"

/*
 * Here's how Windows stores the midiOut mapping information.
 *
 * Full form (in HKU) is:
 *
 * [Software\\Microsoft\\Windows\\CurrentVersion\\Multimedia\\MIDIMap] 988836060
 * "AutoScheme"=dword:00000000
 * "ConfigureCount"=dword:00000004
 * "CurrentInstrument"="Wine OSS midi"
 * "CurrentScheme"="epp"
 * "DriverList"=""
 * "UseScheme"=dword:00000000
 *
 * AutoScheme:          ?
 * CurrentInstrument:   name of midiOut device to use when UseScheme is 0. Wine uses an extension
 *                of the form #n to link to n'th midiOut device of the system
 * CurrentScheme: when UseScheme is non null, it's the scheme to use (see below)
 * DriverList:          ?
 * UseScheme:           trigger for simple/complex mapping
 *
 * A scheme is defined (in HKLM) as:
 *
 * [System\\CurrentControlSet\\Control\\MediaProperties\\PrivateProperties\\Midi\\Schemes\<nameScheme>]
 * <nameScheme>:  one key for each defined scheme (system wide)
 * under each one of these <nameScheme> keys, there's:
 * [...\<nameScheme>\<idxDevice>]
 * "Channels"="<bitMask>"
 * (the default value of this key also refers to the name of the device).
 *
 * this defines, for each midiOut device (identified by its index in <idxDevice>), which
 * channels have to be mapped onto it. The <bitMask> defines the channels (from 0 to 15)
 * will be mapped (mapping occurs for channel <ch> if bit <ch> is set in <bitMask>
 *
 * Further mapping information can also be defined in:
 * [System\\CurrentControlSet\\Control\\MediaProperties\\PrivateProperties\\Midi\\Ports\<nameDevice>\\Instruments\<idx>]
 * "Definition"="<.idf file>"
 * "FriendlyName"="#for .idx file#"
 * "Port"="<idxPort>"
 *
 * This last part isn't implemented (.idf file support).
 */

WINE_DEFAULT_DEBUG_CHANNEL(msacm);

typedef struct tagMIDIOUTPORT
{
    WCHAR         name[MAXPNAMELEN];
    int                 loaded;
    HMIDIOUT            hMidi;
    unsigned short      uDevID;
    LPBYTE        lpbPatch;
    unsigned int  aChn[16];
} MIDIOUTPORT;

typedef     struct tagMIDIMAPDATA
{
    struct tagMIDIMAPDATA*    self;
    MIDIOUTPORT*  ChannelMap[16];
} MIDIMAPDATA;

static      MIDIOUTPORT*      midiOutPorts;
static  unsigned  numMidiOutPorts;

static      BOOL  MIDIMAP_IsBadData(MIDIMAPDATA* mm)
{
    if (!IsBadReadPtr(mm, sizeof(MIDIMAPDATA)) && mm->self == mm)
      return FALSE;
    TRACE("Bad midimap data (%p)\n", mm);
    return TRUE;
}

static BOOL MIDIMAP_FindPort(const WCHAR* name, unsigned* dev)
{
    for (*dev = 0; *dev < numMidiOutPorts; (*dev)++)
    {
      TRACE("%s\n", wine_dbgstr_w(midiOutPorts[*dev].name));
      if (strcmpW(midiOutPorts[*dev].name, name) == 0)
          return TRUE;
    }
    /* try the form #nnn */
    if (*name == '#' && isdigit(name[1]))
    {
        const WCHAR*  ptr = name + 1;
        *dev = 0;
        do 
        {
            *dev = *dev * 10 + *ptr - '0';
        } while (isdigit(*++ptr));
      if (*dev < numMidiOutPorts)
          return TRUE;
    }
    return FALSE;
}

static BOOL MIDIMAP_LoadSettingsDefault(MIDIMAPDATA* mom, const WCHAR* port)
{
    unsigned i, dev = 0;

    if (port != NULL && !MIDIMAP_FindPort(port, &dev))
    {
      ERR("Registry glitch: couldn't find midi out (%s)\n", wine_dbgstr_w(port));
      dev = 0;
    }

    /* this is necessary when no midi out ports are present */
    if (dev >= numMidiOutPorts)
      return FALSE;
    /* sets default */
    for (i = 0; i < 16; i++) mom->ChannelMap[i] = &midiOutPorts[dev];

    return TRUE;
}

static BOOL MIDIMAP_LoadSettingsScheme(MIDIMAPDATA* mom, const WCHAR* scheme)
{
    HKEY    hSchemesKey, hKey, hPortKey;
    unsigned      i, idx, dev;
    WCHAR       buffer[256], port[256];
    DWORD   type, size, mask;

    for (i = 0; i < 16; i++)  mom->ChannelMap[i] = NULL;

    if (RegOpenKeyA(HKEY_LOCAL_MACHINE,
                "System\\CurrentControlSet\\Control\\MediaProperties\\PrivateProperties\\Midi\\Schemes",
                &hSchemesKey))
    {
      return FALSE;
    }
    if (RegOpenKeyW(hSchemesKey, scheme, &hKey))
    {
      RegCloseKey(hSchemesKey);
      return FALSE;
    }

    for (idx = 0; !RegEnumKeyW(hKey, idx, buffer, sizeof(buffer)); idx++)
    {
      if (RegOpenKeyW(hKey, buffer, &hPortKey)) continue;

      size = sizeof(port);
      if (RegQueryValueExW(hPortKey, NULL, 0, &type, (void*)port, &size)) continue;

      if (!MIDIMAP_FindPort(port, &dev)) continue;

      size = sizeof(mask);
      if (RegQueryValueExA(hPortKey, "Channels", 0, &type, (void*)&mask, &size))
          continue;

      for (i = 0; i < 16; i++)
      {
          if (mask & (1 << i))
          {
            if (mom->ChannelMap[i])
                ERR("Quirks in registry, channel %u is mapped twice\n", i);
            mom->ChannelMap[i] = &midiOutPorts[dev];
          }
      }
    }

    RegCloseKey(hSchemesKey);
    RegCloseKey(hKey);

    return TRUE;
}

static BOOL MIDIMAP_LoadSettings(MIDIMAPDATA* mom)
{
    HKEY    hKey;
    BOOL    ret;

    if (RegOpenKeyA(HKEY_CURRENT_USER,
                "Software\\Microsoft\\Windows\\CurrentVersion\\Multimedia\\MIDIMap", &hKey))
    {
      ret = MIDIMAP_LoadSettingsDefault(mom, NULL);
    }
    else
    {
      DWORD type, size, out;
      WCHAR   buffer[256];

      ret = 2;
      size = sizeof(out);
      if (!RegQueryValueExA(hKey, "UseScheme", 0, &type, (void*)&out, &size) && out)
      {
            static const WCHAR cs[] = {'C','u','r','r','e','n','t','S','c','h','e','m','e',0};
          size = sizeof(buffer);
          if (!RegQueryValueExW(hKey, cs, 0, &type, (void*)buffer, &size))
          {
            if (!(ret = MIDIMAP_LoadSettingsScheme(mom, buffer)))
                ret = MIDIMAP_LoadSettingsDefault(mom, NULL);
          }
          else
          {
            ERR("Wrong registry: UseScheme is active, but no CurrentScheme found\n");
          }
      }
      if (ret == 2)
      {
            static const WCHAR ci[] = {'C','u','r','r','e','n','t','I','n','s','t','r','u','m','e','n','t',0};
          size = sizeof(buffer);
          if (!RegQueryValueExW(hKey, ci, 0, &type, (void*)buffer, &size) && *buffer)
          {
            ret = MIDIMAP_LoadSettingsDefault(mom, buffer);
          }
          else
          {
            ret = MIDIMAP_LoadSettingsDefault(mom, NULL);
          }
      }
    }
    RegCloseKey(hKey);

    if (ret && TRACE_ON(msacm))
    {
      unsigned    i;

      for (i = 0; i < 16; i++)
      {
          TRACE("chnMap[%2d] => %d\n",
              i, mom->ChannelMap[i] ? mom->ChannelMap[i]->uDevID : -1);
      }
    }
    return ret;
}

static      DWORD modOpen(LPDWORD lpdwUser, LPMIDIOPENDESC lpDesc, DWORD dwFlags)
{
    MIDIMAPDATA*  mom = HeapAlloc(GetProcessHeap(), 0, sizeof(MIDIMAPDATA));

    TRACE("(%p %p %08lx)\n", lpdwUser, lpDesc, dwFlags);

    if (!mom) return MMSYSERR_NOMEM;

    if (MIDIMAP_LoadSettings(mom))
    {
      *lpdwUser = (DWORD)mom;
      mom->self = mom;

      return MMSYSERR_NOERROR;
    }
    HeapFree(GetProcessHeap(), 0, mom);
    return MIDIERR_INVALIDSETUP;
}

static      DWORD modClose(MIDIMAPDATA* mom)
{
    UINT    i;
    DWORD   ret = MMSYSERR_NOERROR;

    if (MIDIMAP_IsBadData(mom))     return MMSYSERR_ERROR;

    for (i = 0; i < 16; i++)
    {
      DWORD t;
      if (mom->ChannelMap[i] && mom->ChannelMap[i]->loaded > 0)
      {
          t = midiOutClose(mom->ChannelMap[i]->hMidi);
          if (t == MMSYSERR_NOERROR)
          {
            mom->ChannelMap[i]->loaded = 0;
            mom->ChannelMap[i]->hMidi = 0;
          }
          else if (ret == MMSYSERR_NOERROR)
            ret = t;
      }
    }
    if (ret == MMSYSERR_NOERROR)
      HeapFree(GetProcessHeap(), 0, mom);
    return ret;
}

static      DWORD modLongData(MIDIMAPDATA* mom, LPMIDIHDR lpMidiHdr, DWORD dwParam2)
{
    WORD    chn;
    DWORD   ret = MMSYSERR_NOERROR;
    MIDIHDR mh;

    if (MIDIMAP_IsBadData(mom))
      return MMSYSERR_ERROR;

    mh = *lpMidiHdr;
    for (chn = 0; chn < 16; chn++)
    {
      if (mom->ChannelMap[chn] && mom->ChannelMap[chn]->loaded > 0)
      {
          mh.dwFlags = 0;
          midiOutPrepareHeader(mom->ChannelMap[chn]->hMidi, &mh, sizeof(mh));
          ret = midiOutLongMsg(mom->ChannelMap[chn]->hMidi, &mh, sizeof(mh));
          midiOutUnprepareHeader(mom->ChannelMap[chn]->hMidi, &mh, sizeof(mh));
          if (ret != MMSYSERR_NOERROR) break;
      }
    }
    return ret;
}

static      DWORD modData(MIDIMAPDATA* mom, DWORD dwParam)
{
    BYTE    lb = LOBYTE(LOWORD(dwParam));
    WORD    chn = lb & 0x0F;
    DWORD   ret = MMSYSERR_NOERROR;

    if (MIDIMAP_IsBadData(mom))
      return MMSYSERR_ERROR;

    if (!mom->ChannelMap[chn]) return MMSYSERR_NOERROR;

    switch (lb & 0xF0)
    {
    case 0x80:
    case 0x90:
    case 0xA0:
    case 0xB0:
    case 0xC0:
    case 0xD0:
    case 0xE0:
      if (mom->ChannelMap[chn]->loaded == 0)
      {
          if (midiOutOpen(&mom->ChannelMap[chn]->hMidi, mom->ChannelMap[chn]->uDevID,
                      0L, 0L, CALLBACK_NULL) == MMSYSERR_NOERROR)
            mom->ChannelMap[chn]->loaded = 1;
          else
            mom->ChannelMap[chn]->loaded = -1;
          /* FIXME: should load here the IDF midi data... and allow channel and
           * patch mappings
           */
      }
      if (mom->ChannelMap[chn]->loaded > 0)
      {
          /* change channel */
          dwParam &= ~0x0F;
          dwParam |= mom->ChannelMap[chn]->aChn[chn];

          if ((LOBYTE(LOWORD(dwParam)) & 0xF0) == 0xC0 /* program change */ &&
            mom->ChannelMap[chn]->lpbPatch)
          {
            BYTE patch = HIBYTE(LOWORD(dwParam));

            /* change patch */
            dwParam &= ~0x0000FF00;
            dwParam |= mom->ChannelMap[chn]->lpbPatch[patch];
          }
          ret = midiOutShortMsg(mom->ChannelMap[chn]->hMidi, dwParam);
      }
      break;
    case 0xF0:
      for (chn = 0; chn < 16; chn++)
      {
          if (mom->ChannelMap[chn]->loaded > 0)
            ret = midiOutShortMsg(mom->ChannelMap[chn]->hMidi, dwParam);
      }
      break;
    default:
      FIXME("ooch %lu\n", dwParam);
    }

    return ret;
}

static      DWORD modPrepare(MIDIMAPDATA* mom, LPMIDIHDR lpMidiHdr, DWORD dwParam2)
{
    if (MIDIMAP_IsBadData(mom)) return MMSYSERR_ERROR;
    if (lpMidiHdr->dwFlags & (MHDR_ISSTRM|MHDR_PREPARED))
      return MMSYSERR_INVALPARAM;

    lpMidiHdr->dwFlags |= MHDR_PREPARED;
    return MMSYSERR_NOERROR;
}

static      DWORD modUnprepare(MIDIMAPDATA* mom, LPMIDIHDR lpMidiHdr, DWORD dwParam2)
{
    if (MIDIMAP_IsBadData(mom)) return MMSYSERR_ERROR;
    if ((lpMidiHdr->dwFlags & MHDR_ISSTRM) || !(lpMidiHdr->dwFlags & MHDR_PREPARED))
      return MMSYSERR_INVALPARAM;

    lpMidiHdr->dwFlags &= ~MHDR_PREPARED;
    return MMSYSERR_NOERROR;
}

static      DWORD modGetDevCaps(UINT wDevID, MIDIMAPDATA* mom, LPMIDIOUTCAPSW lpMidiCaps, DWORD size)
{
    static const WCHAR name[] = {'W','i','n','e',' ','m','i','d','i',' ','m','a','p','p','e','r',0};
    lpMidiCaps->wMid = 0x00FF;
    lpMidiCaps->wPid = 0x0001;
    lpMidiCaps->vDriverVersion = 0x0100;
    lstrcpyW(lpMidiCaps->szPname, name);
    lpMidiCaps->wTechnology = MOD_MAPPER;
    lpMidiCaps->wVoices = 0;
    lpMidiCaps->wNotes = 0;
    lpMidiCaps->wChannelMask = 0xFFFF;
    lpMidiCaps->dwSupport = 0L;

    return MMSYSERR_NOERROR;
}

static      DWORD modReset(MIDIMAPDATA* mom)
{
    WORD    chn;
    DWORD   ret = MMSYSERR_NOERROR;

    if (MIDIMAP_IsBadData(mom))
      return MMSYSERR_ERROR;

    for (chn = 0; chn < 16; chn++)
    {
      if (mom->ChannelMap[chn] && mom->ChannelMap[chn]->loaded > 0)
      {
          ret = midiOutReset(mom->ChannelMap[chn]->hMidi);
          if (ret != MMSYSERR_NOERROR) break;
      }
    }
    return ret;
}

/**************************************************************************
 *                      modMessage (MIDIMAP.@)
 */
DWORD WINAPI MIDIMAP_modMessage(UINT wDevID, UINT wMsg, DWORD dwUser,
                        DWORD dwParam1, DWORD dwParam2)
{
    TRACE("(%u, %04X, %08lX, %08lX, %08lX);\n",
        wDevID, wMsg, dwUser, dwParam1, dwParam2);

    switch (wMsg)
    {
    case DRVM_INIT:
    case DRVM_EXIT:
    case DRVM_ENABLE:
    case DRVM_DISABLE:
      /* FIXME: Pretend this is supported */
      return 0;

    case MODM_OPEN:           return modOpen          ((LPDWORD)dwUser,      (LPMIDIOPENDESC)dwParam1,dwParam2);
    case MODM_CLOSE:          return modClose         ((MIDIMAPDATA*)dwUser);

    case MODM_DATA:           return modData          ((MIDIMAPDATA*)dwUser, dwParam1);
    case MODM_LONGDATA:       return modLongData      ((MIDIMAPDATA*)dwUser, (LPMIDIHDR)dwParam1,     dwParam2);
    case MODM_PREPARE:        return modPrepare ((MIDIMAPDATA*)dwUser, (LPMIDIHDR)dwParam1,     dwParam2);
    case MODM_UNPREPARE:      return modUnprepare     ((MIDIMAPDATA*)dwUser, (LPMIDIHDR)dwParam1,     dwParam2);
    case MODM_RESET:          return modReset         ((MIDIMAPDATA*)dwUser);

    case MODM_GETDEVCAPS:     return modGetDevCaps    (wDevID, (MIDIMAPDATA*)dwUser, (LPMIDIOUTCAPSW)dwParam1,dwParam2);
    case MODM_GETNUMDEVS:     return 1;
    case MODM_GETVOLUME:      return MMSYSERR_NOTSUPPORTED;
    case MODM_SETVOLUME:      return MMSYSERR_NOTSUPPORTED;
    default:
      FIXME("unknown message %d!\n", wMsg);
    }
    return MMSYSERR_NOTSUPPORTED;
}

/*======================================================================*
 *                  Driver part                                         *
 *======================================================================*/

/**************************************************************************
 *                      MIDIMAP_drvOpen               [internal]
 */
static LRESULT MIDIMAP_drvOpen(LPSTR str)
{
    MIDIOUTCAPSW  moc;
    unsigned            dev, i;

    if (midiOutPorts)
      return 0;

    numMidiOutPorts = midiOutGetNumDevs();
    midiOutPorts = HeapAlloc(GetProcessHeap(), 0,
                       numMidiOutPorts * sizeof(MIDIOUTPORT));
    for (dev = 0; dev < numMidiOutPorts; dev++)
    {
      if (midiOutGetDevCapsW(dev, &moc, sizeof(moc)) == 0L)
      {
          strcpyW(midiOutPorts[dev].name, moc.szPname);
          midiOutPorts[dev].loaded = 0;
          midiOutPorts[dev].hMidi = 0;
          midiOutPorts[dev].uDevID = dev;
          midiOutPorts[dev].lpbPatch = NULL;
          for (i = 0; i < 16; i++)
            midiOutPorts[dev].aChn[i] = i;
      }
      else
      {
          midiOutPorts[dev].loaded = -1;
      }
    }

    return 1;
}

/**************************************************************************
 *                      MIDIMAP_drvClose        [internal]
 */
static LRESULT MIDIMAP_drvClose(DWORD_PTR dwDevID)
{
    if (midiOutPorts)
    {
      HeapFree(GetProcessHeap(), 0, midiOutPorts);
      midiOutPorts = NULL;
      return 1;
    }
    return 0;
}

/**************************************************************************
 *                      DriverProc (MIDIMAP.@)
 */
LRESULT CALLBACK MIDIMAP_DriverProc(DWORD_PTR dwDevID, HDRVR hDriv, UINT wMsg,
                                    LPARAM dwParam1, LPARAM dwParam2)
{
/* EPP     TRACE("(%08lX, %04X, %08lX, %08lX, %08lX)\n",  */
/* EPP        dwDevID, hDriv, wMsg, dwParam1, dwParam2); */

    switch (wMsg)
    {
    case DRV_LOAD:            return 1;
    case DRV_FREE:            return 1;
    case DRV_OPEN:            return MIDIMAP_drvOpen((LPSTR)dwParam1);
    case DRV_CLOSE:           return MIDIMAP_drvClose(dwDevID);
    case DRV_ENABLE:          return 1;
    case DRV_DISABLE:         return 1;
    case DRV_QUERYCONFIGURE:  return 1;
    case DRV_CONFIGURE:       MessageBoxA(0, "MIDIMAP MultiMedia Driver !", "OSS Driver", MB_OK);     return 1;
    case DRV_INSTALL:         return DRVCNF_RESTART;
    case DRV_REMOVE:          return DRVCNF_RESTART;
    default:
      return DefDriverProc(dwDevID, hDriv, wMsg, dwParam1, dwParam2);
    }
}

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