dlls/mmsystem.dll16/mci16.c

   1 /*
   2  * MMSYSTEM functions
   3  *
   4  * Copyright 1993      Martin Ayotte
   5  *           1998-2003,2009 Eric Pouech
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  */
  21
  22 #include <stdarg.h>
  23 #include <string.h>
  24 #include <stdio.h>
  25
  26 #define NONAMELESSUNION
  27 #define NONAMELESSSTRUCT
  28 #include "windef.h"
  29 #include "winbase.h"
  30 #include "mmsystem.h"
  31 #include "winternl.h"
  32 #include "wownt32.h"
  33 #include "winnls.h"
  34
  35 #include "wine/winuser16.h"
  36 #include "winemm16.h"
  37 #include "digitalv.h"
  38
  39 #include "wine/debug.h"
  40
  41 WINE_DEFAULT_DEBUG_CHANNEL(mmsys);
  42
  43 /**************************************************************************
  44  *                      MCI_MessageToString                     [internal]
  45  */
  46 static const char* MCI_MessageToString(UINT wMsg)
  47 {
  48     static char buffer[100];
  49
  50 #define CASE(s) case (s): return #s
  51
  52     switch (wMsg) {
  53         CASE(DRV_LOAD);
  54         CASE(DRV_ENABLE);
  55         CASE(DRV_OPEN);
  56         CASE(DRV_CLOSE);
  57         CASE(DRV_DISABLE);
  58         CASE(DRV_FREE);
  59         CASE(DRV_CONFIGURE);
  60         CASE(DRV_QUERYCONFIGURE);
  61         CASE(DRV_INSTALL);
  62         CASE(DRV_REMOVE);
  63         CASE(DRV_EXITSESSION);
  64         CASE(DRV_EXITAPPLICATION);
  65         CASE(DRV_POWER);
  66         CASE(MCI_BREAK);
  67         CASE(MCI_CLOSE);
  68         CASE(MCI_CLOSE_DRIVER);
  69         CASE(MCI_COPY);
  70         CASE(MCI_CUE);
  71         CASE(MCI_CUT);
  72         CASE(MCI_DELETE);
  73         CASE(MCI_ESCAPE);
  74         CASE(MCI_FREEZE);
  75         CASE(MCI_PAUSE);
  76         CASE(MCI_PLAY);
  77         CASE(MCI_GETDEVCAPS);
  78         CASE(MCI_INFO);
  79         CASE(MCI_LOAD);
  80         CASE(MCI_OPEN);
  81         CASE(MCI_OPEN_DRIVER);
  82         CASE(MCI_PASTE);
  83         CASE(MCI_PUT);
  84         CASE(MCI_REALIZE);
  85         CASE(MCI_RECORD);
  86         CASE(MCI_RESUME);
  87         CASE(MCI_SAVE);
  88         CASE(MCI_SEEK);
  89         CASE(MCI_SET);
  90         CASE(MCI_SOUND);
  91         CASE(MCI_SPIN);
  92         CASE(MCI_STATUS);
  93         CASE(MCI_STEP);
  94         CASE(MCI_STOP);
  95         CASE(MCI_SYSINFO);
  96         CASE(MCI_UNFREEZE);
  97         CASE(MCI_UPDATE);
  98         CASE(MCI_WHERE);
  99         CASE(MCI_WINDOW);
 100         /* constants for digital video */
 101         CASE(MCI_CAPTURE);
 102         CASE(MCI_MONITOR);
 103         CASE(MCI_RESERVE);
 104         CASE(MCI_SETAUDIO);
 105         CASE(MCI_SIGNAL);
 106         CASE(MCI_SETVIDEO);
 107         CASE(MCI_QUALITY);
 108         CASE(MCI_LIST);
 109         CASE(MCI_UNDO);
 110         CASE(MCI_CONFIGURE);
 111         CASE(MCI_RESTORE);
 112 #undef CASE
 113     default:
 114         sprintf(buffer, "MCI_<<%04X>>", wMsg);
 115         return buffer;
 116     }
 117 }
 118
 119 static LPWSTR MCI_strdupAtoW( LPCSTR str )
 120 {
 121     LPWSTR ret;
 122     INT len;
 123
 124     if (!str) return NULL;
 125     len = MultiByteToWideChar( CP_ACP, 0, str, -1, NULL, 0 );
 126     ret = HeapAlloc( GetProcessHeap(), 0, len * sizeof(WCHAR) );
 127     if (ret) MultiByteToWideChar( CP_ACP, 0, str, -1, ret, len );
 128     return ret;
 129 }
 130
 131 /**************************************************************************
 132  *                      MCI_MapMsg16To32W                       [internal]
 133  */
 134 static MMSYSTEM_MapType MCI_MapMsg16To32W(WORD wMsg, DWORD dwFlags, DWORD_PTR* lParam)
 135 {
 136     if (*lParam == 0)
 137         return MMSYSTEM_MAP_OK;
 138     /* FIXME: to add also (with seg/linear modifications to do):
 139      * MCI_LIST, MCI_LOAD, MCI_QUALITY, MCI_RESERVE, MCI_RESTORE, MCI_SAVE
 140      * MCI_SETAUDIO, MCI_SETTUNER, MCI_SETVIDEO
 141      */
 142     switch (wMsg) {
 143         /* case MCI_CAPTURE */
 144     case MCI_CLOSE:
 145     case MCI_CLOSE_DRIVER:
 146     case MCI_CONFIGURE:
 147     case MCI_COPY:
 148     case MCI_CUE:
 149     case MCI_CUT:
 150     case MCI_DELETE:
 151     case MCI_FREEZE:
 152     case MCI_GETDEVCAPS:
 153         /* case MCI_INDEX: */
 154         /* case MCI_MARK: */
 155         /* case MCI_MONITOR: */
 156     case MCI_PASTE:
 157     case MCI_PAUSE:
 158     case MCI_PLAY:
 159     case MCI_PUT:
 160     case MCI_REALIZE:
 161     case MCI_RECORD:
 162     case MCI_RESUME:
 163     case MCI_SEEK:
 164     case MCI_SET:
 165         /* case MCI_SETTIMECODE:*/
 166         /* case MCI_SIGNAL:*/
 167     case MCI_SPIN:
 168     case MCI_STATUS:            /* FIXME: is wrong for digital video */
 169     case MCI_STEP:
 170     case MCI_STOP:
 171         /* case MCI_UNDO: */
 172     case MCI_UNFREEZE:
 173     case MCI_UPDATE:
 174     case MCI_WHERE:
 175         *lParam = (DWORD)MapSL(*lParam);
 176         return MMSYSTEM_MAP_OK;
 177     case MCI_WINDOW:
 178         /* in fact, I would also need the dwFlags... to see
 179          * which members of lParam are effectively used
 180          */
 181         *lParam = (DWORD)MapSL(*lParam);
 182         FIXME("Current mapping may be wrong\n");
 183         break;
 184     case MCI_BREAK:
 185         {
 186             LPMCI_BREAK_PARMS           mbp32 = HeapAlloc(GetProcessHeap(), 0, sizeof(MCI_BREAK_PARMS));
 187             LPMCI_BREAK_PARMS16         mbp16 = MapSL(*lParam);
 188
 189             if (mbp32) {
 190                 mbp32->dwCallback = mbp16->dwCallback;
 191                 mbp32->nVirtKey = mbp16->nVirtKey;
 192                 mbp32->hwndBreak = HWND_32(mbp16->hwndBreak);
 193             } else {
 194                 return MMSYSTEM_MAP_NOMEM;
 195             }
 196             *lParam = (DWORD)mbp32;
 197         }
 198         return MMSYSTEM_MAP_OKMEM;
 199     case MCI_ESCAPE:
 200         {
 201             LPMCI_VD_ESCAPE_PARMSW      mvep32w = HeapAlloc(GetProcessHeap(), 0, sizeof(MCI_VD_ESCAPE_PARMSW));
 202             LPMCI_VD_ESCAPE_PARMS16     mvep16  = MapSL(*lParam);
 203
 204             if (mvep32w) {
 205                 mvep32w->dwCallback       = mvep16->dwCallback;
 206                 mvep32w->lpstrCommand     = MCI_strdupAtoW(MapSL(mvep16->lpstrCommand));
 207             } else {
 208                 return MMSYSTEM_MAP_NOMEM;
 209             }
 210             *lParam = (DWORD)mvep32w;
 211         }
 212         return MMSYSTEM_MAP_OKMEM;
 213     case MCI_INFO:
 214         {
 215             LPMCI_INFO_PARMSW   mip32w = HeapAlloc(GetProcessHeap(), 0, sizeof(LPMCI_OPEN_PARMS16) + sizeof(MCI_INFO_PARMSW));
 216             LPMCI_INFO_PARMS16  mip16  = MapSL(*lParam);
 217
 218             /* FIXME this is wrong if device is of type
 219              * MCI_DEVTYPE_DIGITAL_VIDEO, some members are not mapped
 220              */
 221             if (mip32w) {
 222                 *(LPMCI_INFO_PARMS16*)(mip32w) = mip16;
 223                 mip32w = (LPMCI_INFO_PARMSW)((char*)mip32w + sizeof(LPMCI_INFO_PARMS16));
 224                 mip32w->dwCallback  = mip16->dwCallback;
 225                 mip32w->lpstrReturn = HeapAlloc(GetProcessHeap(), 0, mip16->dwRetSize * sizeof(WCHAR));
 226                 mip32w->dwRetSize   = mip16->dwRetSize * sizeof(WCHAR);
 227             } else {
 228                 return MMSYSTEM_MAP_NOMEM;
 229             }
 230             *lParam = (DWORD)mip32w;
 231         }
 232         return MMSYSTEM_MAP_OKMEM;
 233     case MCI_OPEN:
 234     case MCI_OPEN_DRIVER:
 235         {
 236             LPMCI_OPEN_PARMSW   mop32w = HeapAlloc(GetProcessHeap(), 0, sizeof(LPMCI_OPEN_PARMS16) + sizeof(MCI_OPEN_PARMSW) + 2 * sizeof(DWORD));
 237             LPMCI_OPEN_PARMS16  mop16  = MapSL(*lParam);
 238
 239             if (mop32w) {
 240                 *(LPMCI_OPEN_PARMS16*)(mop32w) = mop16;
 241                 mop32w = (LPMCI_OPEN_PARMSW)((char*)mop32w + sizeof(LPMCI_OPEN_PARMS16));
 242                 mop32w->dwCallback       = mop16->dwCallback;
 243                 mop32w->wDeviceID        = mop16->wDeviceID;
 244                 if( ( dwFlags & ( MCI_OPEN_TYPE | MCI_OPEN_TYPE_ID)) == MCI_OPEN_TYPE)
 245                     mop32w->lpstrDeviceType  = MCI_strdupAtoW(MapSL(mop16->lpstrDeviceType));
 246                 else
 247                     mop32w->lpstrDeviceType  = (LPWSTR) mop16->lpstrDeviceType;
 248                 if( ( dwFlags & ( MCI_OPEN_ELEMENT | MCI_OPEN_ELEMENT_ID)) == MCI_OPEN_ELEMENT)
 249                     mop32w->lpstrElementName = MCI_strdupAtoW(MapSL(mop16->lpstrElementName));
 250                 else
 251                     mop32w->lpstrElementName = (LPWSTR) mop16->lpstrElementName;
 252                 if( ( dwFlags &  MCI_OPEN_ALIAS))
 253                     mop32w->lpstrAlias = MCI_strdupAtoW(MapSL(mop16->lpstrAlias));
 254                 else
 255                     mop32w->lpstrAlias = (LPWSTR) mop16->lpstrAlias;
 256                 /* copy extended information if any...
 257                  * FIXME: this may seg fault if initial structure does not contain them and
 258                  * the reads after msip16 fail under LDT limits...
 259                  * NOTE: this should be split in two. First pass, while calling MCI_OPEN, and
 260                  * should not take care of extended parameters, and should be used by MCI_Open
 261                  * to fetch uDevType. When, this is known, the mapping for sending the
 262                  * MCI_OPEN_DRIVER shall be done depending on uDevType.
 263                  */
 264                 memcpy(mop32w + 1, mop16 + 1, 2 * sizeof(DWORD));
 265             } else {
 266                 return MMSYSTEM_MAP_NOMEM;
 267             }
 268             *lParam = (DWORD)mop32w;
 269         }
 270         return MMSYSTEM_MAP_OKMEM;
 271     case MCI_SYSINFO:
 272         {
 273             LPMCI_SYSINFO_PARMSW        msip32w = HeapAlloc(GetProcessHeap(), 0, sizeof(LPMCI_OPEN_PARMS16) + sizeof(MCI_SYSINFO_PARMSW));
 274             LPMCI_SYSINFO_PARMS16       msip16  = MapSL(*lParam);
 275
 276             if (msip32w) {
 277                 *(LPMCI_SYSINFO_PARMS16*)(msip32w) = msip16;
 278                 msip32w = (LPMCI_SYSINFO_PARMSW)((char*)msip32w + sizeof(LPMCI_OPEN_PARMS16));
 279                 msip32w->dwCallback       = msip16->dwCallback;
 280                 msip32w->lpstrReturn      = HeapAlloc(GetProcessHeap(), 0, msip16->dwRetSize * sizeof(WCHAR));
 281                 msip32w->dwRetSize        = msip16->dwRetSize;
 282                 msip32w->dwNumber         = msip16->dwNumber;
 283                 msip32w->wDeviceType      = msip16->wDeviceType;
 284             } else {
 285                 return MMSYSTEM_MAP_NOMEM;
 286             }
 287             *lParam = (DWORD)msip32w;
 288         }
 289         return MMSYSTEM_MAP_OKMEM;
 290     case MCI_SOUND:
 291         {
 292             LPMCI_SOUND_PARMSW          mbp32 = HeapAlloc(GetProcessHeap(), 0, sizeof(MCI_SOUND_PARMSW));
 293             LPMCI_SOUND_PARMS16         mbp16 = MapSL(*lParam);
 294
 295             if (mbp32) {
 296                 mbp32->dwCallback = mbp16->dwCallback;
 297                 mbp32->lpstrSoundName = MCI_strdupAtoW(MapSL(mbp16->lpstrSoundName));
 298             } else {
 299                 return MMSYSTEM_MAP_NOMEM;
 300             }
 301             *lParam = (DWORD)mbp32;
 302         }
 303         return MMSYSTEM_MAP_OKMEM;
 304     case DRV_LOAD:
 305     case DRV_ENABLE:
 306     case DRV_OPEN:
 307     case DRV_CLOSE:
 308     case DRV_DISABLE:
 309     case DRV_FREE:
 310     case DRV_CONFIGURE:
 311     case DRV_QUERYCONFIGURE:
 312     case DRV_INSTALL:
 313     case DRV_REMOVE:
 314     case DRV_EXITSESSION:
 315     case DRV_EXITAPPLICATION:
 316     case DRV_POWER:
 317         FIXME("This is a hack\n");
 318         return MMSYSTEM_MAP_OK;
 319     default:
 320         FIXME("Don't know how to map msg=%s\n", MCI_MessageToString(wMsg));
 321     }
 322     return MMSYSTEM_MAP_MSGERROR;
 323 }
 324
 325 /**************************************************************************
 326  *                      MCI_UnMapMsg16To32W                     [internal]
 327  */
 328 static  MMSYSTEM_MapType        MCI_UnMapMsg16To32W(WORD wMsg, DWORD dwFlags, DWORD_PTR lParam)
 329 {
 330     switch (wMsg) {
 331         /* case MCI_CAPTURE */
 332     case MCI_CLOSE:
 333     case MCI_CLOSE_DRIVER:
 334     case MCI_CONFIGURE:
 335     case MCI_COPY:
 336     case MCI_CUE:
 337     case MCI_CUT:
 338     case MCI_DELETE:
 339     case MCI_FREEZE:
 340     case MCI_GETDEVCAPS:
 341         /* case MCI_INDEX: */
 342         /* case MCI_MARK: */
 343         /* case MCI_MONITOR: */
 344     case MCI_PASTE:
 345     case MCI_PAUSE:
 346     case MCI_PLAY:
 347     case MCI_PUT:
 348     case MCI_REALIZE:
 349     case MCI_RECORD:
 350     case MCI_RESUME:
 351     case MCI_SEEK:
 352     case MCI_SET:
 353         /* case MCI_SETTIMECODE:*/
 354         /* case MCI_SIGNAL:*/
 355     case MCI_SPIN:
 356     case MCI_STATUS:
 357     case MCI_STEP:
 358     case MCI_STOP:
 359         /* case MCI_UNDO: */
 360     case MCI_UNFREEZE:
 361     case MCI_UPDATE:
 362     case MCI_WHERE:
 363         return MMSYSTEM_MAP_OK;
 364
 365     case MCI_WINDOW:
 366         /* FIXME ?? see Map function */
 367         return MMSYSTEM_MAP_OK;
 368
 369     case MCI_BREAK:
 370         HeapFree(GetProcessHeap(), 0, (LPVOID)lParam);
 371         return MMSYSTEM_MAP_OK;
 372     case MCI_ESCAPE:
 373         if (lParam) {
 374             LPMCI_VD_ESCAPE_PARMSW      mvep32W = (LPMCI_VD_ESCAPE_PARMSW)lParam;
 375             HeapFree(GetProcessHeap(), 0, (LPVOID)mvep32W->lpstrCommand);
 376             HeapFree(GetProcessHeap(), 0, (LPVOID)lParam);
 377         }
 378         return MMSYSTEM_MAP_OK;
 379     case MCI_INFO:
 380         if (lParam) {
 381             LPMCI_INFO_PARMSW           mip32w = (LPMCI_INFO_PARMSW)lParam;
 382             LPMCI_INFO_PARMS16          mip16  = *(LPMCI_INFO_PARMS16*)((char*)mip32w - sizeof(LPMCI_INFO_PARMS16));
 383
 384             WideCharToMultiByte(CP_ACP, 0,
 385                                 mip32w->lpstrReturn, mip32w->dwRetSize / sizeof(WCHAR),
 386                                 MapSL(mip16->lpstrReturn), mip16->dwRetSize,
 387                                 NULL, NULL);
 388             HeapFree(GetProcessHeap(), 0, mip32w->lpstrReturn);
 389             HeapFree(GetProcessHeap(), 0, (LPVOID)lParam);
 390         }
 391         return MMSYSTEM_MAP_OK;
 392     case MCI_SYSINFO:
 393         if (lParam) {
 394             LPMCI_SYSINFO_PARMSW           msip32w = (LPMCI_SYSINFO_PARMSW)lParam;
 395             LPMCI_SYSINFO_PARMS16          msip16  = *(LPMCI_SYSINFO_PARMS16*)((char*)msip32w - sizeof(LPMCI_SYSINFO_PARMS16));
 396
 397             WideCharToMultiByte(CP_ACP, 0,
 398                                 msip32w->lpstrReturn, msip32w->dwRetSize,
 399                                 MapSL(msip16->lpstrReturn), msip16->dwRetSize,
 400                                 NULL, NULL);
 401             HeapFree(GetProcessHeap(), 0, msip32w->lpstrReturn);
 402             HeapFree(GetProcessHeap(), 0, (LPVOID)lParam);
 403         }
 404         return MMSYSTEM_MAP_OK;
 405     case MCI_SOUND:
 406         if (lParam) {
 407             LPMCI_SOUND_PARMSW          msp32W = (LPMCI_SOUND_PARMSW)lParam;
 408             HeapFree(GetProcessHeap(), 0, (LPVOID)msp32W->lpstrSoundName);
 409             HeapFree(GetProcessHeap(), 0, (LPVOID)lParam);
 410         }
 411         return MMSYSTEM_MAP_OK;
 412     case MCI_OPEN:
 413     case MCI_OPEN_DRIVER:
 414         if (lParam) {
 415             LPMCI_OPEN_PARMSW   mop32w = (LPMCI_OPEN_PARMSW)lParam;
 416             LPMCI_OPEN_PARMS16  mop16  = *(LPMCI_OPEN_PARMS16*)((char*)mop32w - sizeof(LPMCI_OPEN_PARMS16));
 417
 418             mop16->wDeviceID = mop32w->wDeviceID;
 419             if( ( dwFlags & ( MCI_OPEN_TYPE | MCI_OPEN_TYPE_ID)) == MCI_OPEN_TYPE)
 420                 HeapFree(GetProcessHeap(), 0, (LPWSTR)mop32w->lpstrDeviceType);
 421             if( ( dwFlags & ( MCI_OPEN_ELEMENT | MCI_OPEN_ELEMENT_ID)) == MCI_OPEN_ELEMENT)
 422                 HeapFree(GetProcessHeap(), 0, (LPWSTR)mop32w->lpstrElementName);
 423             if( ( dwFlags &  MCI_OPEN_ALIAS))
 424                 HeapFree(GetProcessHeap(), 0, (LPWSTR)mop32w->lpstrAlias);
 425             if (!HeapFree(GetProcessHeap(), 0, (LPVOID)(lParam - sizeof(LPMCI_OPEN_PARMS16))))
 426                 FIXME("bad free line=%d\n", __LINE__);
 427         }
 428         return MMSYSTEM_MAP_OK;
 429     case DRV_LOAD:
 430     case DRV_ENABLE:
 431     case DRV_OPEN:
 432     case DRV_CLOSE:
 433     case DRV_DISABLE:
 434     case DRV_FREE:
 435     case DRV_CONFIGURE:
 436     case DRV_QUERYCONFIGURE:
 437     case DRV_INSTALL:
 438     case DRV_REMOVE:
 439     case DRV_EXITSESSION:
 440     case DRV_EXITAPPLICATION:
 441     case DRV_POWER:
 442         FIXME("This is a hack\n");
 443         return MMSYSTEM_MAP_OK;
 444     default:
 445         FIXME("Map/Unmap internal error on msg=%s\n", MCI_MessageToString(wMsg));
 446     }
 447     return MMSYSTEM_MAP_MSGERROR;
 448 }
 449
 450 /* ###################################################
 451  * #                     MCI                         #
 452  * ###################################################
 453  */
 454
 455 #include <pshpack1.h>
 456 #define MCI_MAX_THUNKS      32
 457
 458 static struct mci_thunk
 459 {
 460     BYTE        popl_eax;       /* popl  %eax (return address) */
 461     BYTE        pushl_func;     /* pushl $pfn16 (16bit callback function) */
 462     YIELDPROC16 yield16;
 463     BYTE        pushl_eax;      /* pushl %eax */
 464     BYTE        jmp;            /* ljmp MCI_Yield1632 */
 465     DWORD       callback;
 466     MCIDEVICEID id;
 467 } *MCI_Thunks;
 468
 469 #include <poppack.h>
 470
 471 static CRITICAL_SECTION mci_cs;
 472 static CRITICAL_SECTION_DEBUG mci_critsect_debug =
 473 {
 474     0, 0, &mci_cs,
 475     { &mci_critsect_debug.ProcessLocksList, &mci_critsect_debug.ProcessLocksList },
 476       0, 0, { (DWORD_PTR)(__FILE__ ": mmsystem_mci_cs") }
 477 };
 478 static CRITICAL_SECTION mci_cs = { &mci_critsect_debug, -1, 0, 0, 0, 0 };
 479
 480 static UINT MCI_Yield1632(DWORD pfn16, MCIDEVICEID id, DWORD yield_data)
 481 {
 482     WORD args[8];
 483
 484     if (!pfn16)
 485     {
 486         MSG msg;
 487         PeekMessageW( &msg, 0, 0, 0, PM_REMOVE | PM_QS_SENDMESSAGE );
 488         return 0;
 489     }
 490
 491     /* 16 bit func, call it */
 492     TRACE("Function (16 bit) !\n");
 493
 494     args[2] = (MCIDEVICEID16)id;
 495     args[1] = HIWORD(yield_data);
 496     args[0] = LOWORD(yield_data);
 497     return WOWCallback16Ex(pfn16, WCB16_PASCAL, sizeof(args), args, NULL);
 498 }
 499
 500 /******************************************************************
 501  *              MCI_AddThunk
 502  *
 503  */
 504 static struct mci_thunk*       MCI_AddThunk(MCIDEVICEID id, YIELDPROC16 pfn16)
 505 {
 506      struct mci_thunk* thunk;
 507
 508      if (!MCI_Thunks)
 509      {
 510          MCI_Thunks = VirtualAlloc(NULL, MCI_MAX_THUNKS * sizeof(*MCI_Thunks), MEM_COMMIT,
 511                                    PAGE_EXECUTE_READWRITE);
 512          if (!MCI_Thunks) return NULL;
 513          for (thunk = MCI_Thunks; thunk < &MCI_Thunks[MCI_MAX_THUNKS]; thunk++)
 514          {
 515              thunk->popl_eax     = 0x58;   /* popl  %eax */
 516              thunk->pushl_func   = 0x68;   /* pushl $pfn16 */
 517              thunk->yield16      = 0;
 518              thunk->pushl_eax    = 0x50;   /* pushl %eax */
 519              thunk->jmp          = 0xe9;   /* jmp MCI_Yield1632 */
 520              thunk->callback     = (char *)MCI_Yield1632 - (char *)(&thunk->callback + 1);
 521              thunk->id           = 0;
 522          }
 523      }
 524      for (thunk = MCI_Thunks; thunk < &MCI_Thunks[MCI_MAX_THUNKS]; thunk++)
 525      {
 526          if (thunk->yield16 == 0)
 527          {
 528              thunk->yield16 = pfn16;
 529              thunk->id      = id;
 530              return thunk;
 531          }
 532      }
 533      FIXME("Out of mci-thunks. Bump MCI_MAX_THUNKS\n");
 534      return NULL;
 535 }
 536
 537 /******************************************************************
 538  *              MCI_HasThunk
 539  *
 540  */
 541 static struct mci_thunk*    MCI_HasThunk(YIELDPROC pfn)
 542 {
 543     struct mci_thunk* thunk;
 544
 545     if (!MCI_Thunks) return NULL;
 546     for (thunk = MCI_Thunks; thunk < &MCI_Thunks[MCI_MAX_THUNKS]; thunk++)
 547     {
 548         if ((YIELDPROC)thunk == pfn) return thunk;
 549     }
 550     return NULL;
 551 }
 552
 553 /**************************************************************************
 554  *                              mciSetYieldProc                 [MMSYSTEM.714]
 555  */
 556 BOOL16 WINAPI mciSetYieldProc16(UINT16 uDeviceID, YIELDPROC16 fpYieldProc, DWORD dwYieldData)
 557 {
 558     struct mci_thunk*   thunk;
 559     BOOL                ret;
 560
 561     TRACE("(%u, %p, %08x)\n", uDeviceID, fpYieldProc, dwYieldData);
 562
 563     if (!(thunk = MCI_AddThunk(uDeviceID, fpYieldProc)))
 564         return FALSE;
 565     ret = mciSetYieldProc(uDeviceID, (YIELDPROC)thunk, dwYieldData);
 566     if (!ret) thunk->yield16 = NULL;
 567     return ret;
 568 }
 569
 570 /**************************************************************************
 571  *                              mciGetYieldProc                 [MMSYSTEM.716]
 572  */
 573 YIELDPROC16 WINAPI mciGetYieldProc16(UINT16 uDeviceID, DWORD* lpdwYieldData)
 574 {
 575     YIELDPROC           yield;
 576     DWORD               data;
 577     struct mci_thunk*   thunk;
 578
 579     TRACE("(%u, %p)\n", uDeviceID, lpdwYieldData);
 580
 581     yield = mciGetYieldProc(uDeviceID, &data);
 582     if (!yield || !(thunk = MCI_HasThunk(yield))) return NULL;
 583
 584     if (lpdwYieldData) *lpdwYieldData = data;
 585     return thunk->yield16;
 586 }
 587
 588 /**************************************************************************
 589  *                              mciGetErrorString               [MMSYSTEM.706]
 590  */
 591 BOOL16 WINAPI mciGetErrorString16(DWORD wError, LPSTR lpstrBuffer, UINT16 uLength)
 592 {
 593     return mciGetErrorStringA(wError, lpstrBuffer, uLength);
 594 }
 595
 596 /**************************************************************************
 597  *                              mciDriverNotify                 [MMSYSTEM.711]
 598  */
 599 BOOL16 WINAPI mciDriverNotify16(HWND16 hWndCallBack, UINT16 wDevID, UINT16 wStatus)
 600 {
 601     TRACE("(%04X, %04x, %04X)\n", hWndCallBack, wDevID, wStatus);
 602
 603     return PostMessageA(HWND_32(hWndCallBack), MM_MCINOTIFY, wStatus, wDevID);
 604 }
 605
 606 /**************************************************************************
 607  *                      mciGetDriverData                        [MMSYSTEM.708]
 608  */
 609 DWORD WINAPI mciGetDriverData16(UINT16 uDeviceID)
 610 {
 611     return mciGetDriverData(uDeviceID);
 612 }
 613
 614 /**************************************************************************
 615  *                      mciSetDriverData                        [MMSYSTEM.707]
 616  */
 617 BOOL16 WINAPI mciSetDriverData16(UINT16 uDeviceID, DWORD data)
 618 {
 619     return mciSetDriverData(uDeviceID, data);
 620 }
 621
 622 /**************************************************************************
 623  *                              mciSendCommand                  [MMSYSTEM.701]
 624  */
 625 DWORD WINAPI mciSendCommand16(UINT16 wDevID, UINT16 wMsg, DWORD dwParam1, DWORD p2)
 626 {
 627     DWORD               dwRet;
 628     BOOL                to32;
 629     DWORD_PTR           dwParam2 = p2;
 630
 631     TRACE("(%04X, %s, %08X, %08lX)\n", wDevID, MCI_MessageToString(wMsg), dwParam1, dwParam2);
 632
 633     switch (wMsg) {
 634     case MCI_CLOSE:
 635     case MCI_OPEN:
 636     case MCI_SYSINFO:
 637     case MCI_BREAK:
 638     case MCI_SOUND:
 639         to32 = TRUE;
 640         break;
 641     default:
 642         /* FIXME: this is suboptimal. If MCI driver is a 16bit one, we'll be
 643          * doing 16=>32W, then 32W=>16 conversions.
 644          * We could directly call the 16bit driver if we had the information.
 645          */
 646         to32 = TRUE;
 647     }
 648     if (to32) {
 649         MMSYSTEM_MapType res;
 650
 651         dwRet = MCIERR_INVALID_DEVICE_ID;
 652
 653         switch (res = MCI_MapMsg16To32W(wMsg, dwParam1, &dwParam2)) {
 654         case MMSYSTEM_MAP_MSGERROR:
 655             TRACE("%s not handled yet\n", MCI_MessageToString(wMsg));
 656             dwRet = MCIERR_DRIVER_INTERNAL;
 657             break;
 658         case MMSYSTEM_MAP_NOMEM:
 659             TRACE("Problem mapping %s from 16 to 32a\n", MCI_MessageToString(wMsg));
 660             dwRet = MCIERR_OUT_OF_MEMORY;
 661             break;
 662         case MMSYSTEM_MAP_OK:
 663         case MMSYSTEM_MAP_OKMEM:
 664             dwRet = mciSendCommandW(wDevID, wMsg, dwParam1, dwParam2);
 665             if (res == MMSYSTEM_MAP_OKMEM)
 666                 MCI_UnMapMsg16To32W(wMsg, dwParam1, dwParam2);
 667             break;
 668         }
 669     }
 670     else
 671     {
 672 #if 0
 673         if (wDevID == MCI_ALL_DEVICE_ID) {
 674             FIXME("unhandled MCI_ALL_DEVICE_ID\n");
 675             dwRet = MCIERR_CANNOT_USE_ALL;
 676         } else {
 677             dwRet = SendDriverMessage(hdrv, wMsg, dwParam1, dwParam2);
 678         }
 679 #endif
 680     }
 681     if (wMsg == MCI_CLOSE && dwRet == 0 && MCI_Thunks)
 682     {
 683         /* free yield thunks, if any */
 684         unsigned    i;
 685         for (i = 0; i < MCI_MAX_THUNKS; i++)
 686         {
 687             if (MCI_Thunks[i].id == wDevID)
 688                 MCI_Thunks[i].yield16 = NULL;
 689         }
 690     }
 691     return dwRet;
 692 }
 693
 694 /**************************************************************************
 695  *                              mciGetDeviceID                  [MMSYSTEM.703]
 696  */
 697 UINT16 WINAPI mciGetDeviceID16(LPCSTR lpstrName)
 698 {
 699     TRACE("(\"%s\")\n", lpstrName);
 700
 701     return mciGetDeviceIDA(lpstrName);
 702 }
 703
 704 /**************************************************************************
 705  *                              mciGetDeviceIDFromElementID     [MMSYSTEM.715]
 706  */
 707 UINT16 WINAPI mciGetDeviceIDFromElementID16(DWORD dwElementID, LPCSTR lpstrType)
 708 {
 709     return mciGetDeviceIDFromElementIDA(dwElementID, lpstrType);
 710 }
 711
 712 /**************************************************************************
 713  *                              mciGetCreatorTask               [MMSYSTEM.717]
 714  */
 715 HTASK16 WINAPI mciGetCreatorTask16(UINT16 uDeviceID)
 716 {
 717     return HTASK_16(mciGetCreatorTask(uDeviceID));
 718 }
 719
 720 /**************************************************************************
 721  *                              mciDriverYield                  [MMSYSTEM.710]
 722  */
 723 UINT16 WINAPI mciDriverYield16(UINT16 uDeviceID)
 724 {
 725     return mciDriverYield(uDeviceID);
 726 }
 727
 728 /**************************************************************************
 729  *                              mciSendString                   [MMSYSTEM.702]
 730  */
 731 DWORD WINAPI mciSendString16(LPCSTR lpstrCommand, LPSTR lpstrRet,
 732                              UINT16 uRetLen, HWND16 hwndCallback)
 733 {
 734     return mciSendStringA(lpstrCommand, lpstrRet, uRetLen, HWND_32(hwndCallback));
 735 }
 736
 737 /**************************************************************************
 738  *                      mciLoadCommandResource                  [MMSYSTEM.705]
 739  */
 740 UINT16 WINAPI mciLoadCommandResource16(HINSTANCE16 hInst, LPCSTR resname, UINT16 type)
 741 {
 742     TRACE("(%04x, %s, %x)!\n", hInst, resname, type);
 743     return MCI_NO_COMMAND_TABLE;
 744 }
 745
 746 /**************************************************************************
 747  *                      mciFreeCommandResource                  [MMSYSTEM.713]
 748  */
 749 BOOL16 WINAPI mciFreeCommandResource16(UINT16 uTable)
 750 {
 751     TRACE("(%04x)!\n", uTable);
 752
 753     return FALSE;
 754 }
 755
 756 /**************************************************************************
 757  *                              mciExecute                      [MMSYSTEM.712]
 758  */
 759 BOOL16 WINAPI mciExecute16(LPCSTR lpstrCommand)
 760 {
 761     return mciExecute(lpstrCommand);
 762 }