git.oblomov.eu Git - wine/blob - dlls/msacm32/internal.c

   1 /* -*- tab-width: 8; c-basic-offset: 4 -*- */
   2
   3 /*
   4  *      MSACM32 library
   5  *
   6  *      Copyright 1998  Patrik Stridvall
   7  *                1999  Eric Pouech
   8  *
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2.1 of the License, or (at your option) any later version.
  13  *
  14  * This library is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with this library; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  22  */
  23
  24 #include <stdarg.h>
  25 #include <string.h>
  26
  27 #include "windef.h"
  28 #include "winbase.h"
  29 #include "wingdi.h"
  30 #include "winuser.h"
  31 #include "winerror.h"
  32 #include "winreg.h"
  33 #include "mmsystem.h"
  34 #include "mmreg.h"
  35 #include "msacm.h"
  36 #include "msacmdrv.h"
  37 #include "wineacm.h"
  38 #include "wine/debug.h"
  39 #include "wine/unicode.h"
  40
  41 WINE_DEFAULT_DEBUG_CHANNEL(msacm);
  42
  43 /**********************************************************************/
  44
  45 HANDLE MSACM_hHeap = NULL;
  46 PWINE_ACMDRIVERID MSACM_pFirstACMDriverID = NULL;
  47 static PWINE_ACMDRIVERID MSACM_pLastACMDriverID;
  48
  49 static DWORD MSACM_suspendBroadcastCount = 0;
  50 static BOOL MSACM_pendingBroadcast = FALSE;
  51 static PWINE_ACMNOTIFYWND MSACM_pFirstACMNotifyWnd = NULL;
  52 static PWINE_ACMNOTIFYWND MSACM_pLastACMNotifyWnd = NULL;
  53
  54 static void MSACM_ReorderDriversByPriority(void);
  55
  56 /***********************************************************************
  57  *           MSACM_RegisterDriverFromRegistry()
  58  */
  59 PWINE_ACMDRIVERID MSACM_RegisterDriverFromRegistry(LPCWSTR pszRegEntry)
  60 {
  61     static const WCHAR msacmW[] = {'M','S','A','C','M','.'};
  62     static const WCHAR drvkey[] = {'S','o','f','t','w','a','r','e','\\',
  63                                    'M','i','c','r','o','s','o','f','t','\\',
  64                                    'W','i','n','d','o','w','s',' ','N','T','\\',
  65                                    'C','u','r','r','e','n','t','V','e','r','s','i','o','n','\\',
  66                                    'D','r','i','v','e','r','s','3','2','\0'};
  67     WCHAR buf[2048];
  68     DWORD bufLen, lRet;
  69     HKEY hKey;
  70     PWINE_ACMDRIVERID padid = NULL;
  71
  72     /* The requested registry entry must have the format msacm.XXXXX in order to
  73        be recognized in any future sessions of msacm
  74      */
  75     if (0 == strncmpiW(buf, msacmW, sizeof(msacmW)/sizeof(WCHAR))) {
  76         lRet = RegOpenKeyExW(HKEY_LOCAL_MACHINE, drvkey, 0, KEY_QUERY_VALUE, &hKey);
  77         if (lRet != ERROR_SUCCESS) {
  78             WARN("unable to open registry key - 0x%08x\n", lRet);
  79         } else {
  80             bufLen = sizeof(buf);
  81             lRet = RegQueryValueExW(hKey, pszRegEntry, NULL, NULL, (LPBYTE)buf, &bufLen);
  82             if (lRet != ERROR_SUCCESS) {
  83                 WARN("unable to query requested subkey %s - 0x%08x\n", debugstr_w(pszRegEntry), lRet);
  84             } else {
  85                 MSACM_RegisterDriver(pszRegEntry, buf, 0);
  86             }
  87             RegCloseKey( hKey );
  88         }
  89     }
  90     return padid;
  91 }
  92
  93 #if 0
  94 /***********************************************************************
  95  *           MSACM_DumpCache
  96  */
  97 static  void MSACM_DumpCache(PWINE_ACMDRIVERID padid)
  98 {
  99     unsigned    i;
 100
 101     TRACE("cFilterTags=%lu cFormatTags=%lu fdwSupport=%08lx\n",
 102           padid->cFilterTags, padid->cFormatTags, padid->fdwSupport);
 103     for (i = 0; i < padid->cache->cFormatTags; i++) {
 104         TRACE("\tdwFormatTag=%lu cbwfx=%lu\n",
 105               padid->aFormatTag[i].dwFormatTag, padid->aFormatTag[i].cbwfx);
 106     }
 107 }
 108 #endif
 109
 110 /***********************************************************************
 111  *           MSACM_FindFormatTagInCache                 [internal]
 112  *
 113  *      Returns TRUE is the format tag fmtTag is present in the cache.
 114  *      If so, idx is set to its index.
 115  */
 116 BOOL MSACM_FindFormatTagInCache(const WINE_ACMDRIVERID* padid, DWORD fmtTag, LPDWORD idx)
 117 {
 118     unsigned    i;
 119
 120     for (i = 0; i < padid->cFormatTags; i++) {
 121         if (padid->aFormatTag[i].dwFormatTag == fmtTag) {
 122             if (idx) *idx = i;
 123             return TRUE;
 124         }
 125     }
 126     return FALSE;
 127 }
 128
 129 /***********************************************************************
 130  *           MSACM_FillCache
 131  */
 132 static BOOL MSACM_FillCache(PWINE_ACMDRIVERID padid)
 133 {
 134     HACMDRIVER                  had = 0;
 135     unsigned int                        ntag;
 136     ACMDRIVERDETAILSW           add;
 137     ACMFORMATTAGDETAILSW        aftd;
 138
 139     if (acmDriverOpen(&had, (HACMDRIVERID)padid, 0) != 0)
 140         return FALSE;
 141
 142     padid->aFormatTag = NULL;
 143     add.cbStruct = sizeof(add);
 144     if (MSACM_Message(had, ACMDM_DRIVER_DETAILS, (LPARAM)&add,  0))
 145         goto errCleanUp;
 146
 147     if (add.cFormatTags > 0) {
 148         padid->aFormatTag = HeapAlloc(MSACM_hHeap, HEAP_ZERO_MEMORY,
 149                                       add.cFormatTags * sizeof(padid->aFormatTag[0]));
 150         if (!padid->aFormatTag) goto errCleanUp;
 151     }
 152
 153     padid->cFormatTags = add.cFormatTags;
 154     padid->cFilterTags = add.cFilterTags;
 155     padid->fdwSupport  = add.fdwSupport;
 156
 157     aftd.cbStruct = sizeof(aftd);
 158
 159     for (ntag = 0; ntag < add.cFormatTags; ntag++) {
 160         aftd.dwFormatTagIndex = ntag;
 161         if (MSACM_Message(had, ACMDM_FORMATTAG_DETAILS, (LPARAM)&aftd, ACM_FORMATTAGDETAILSF_INDEX)) {
 162             TRACE("IIOs (%s)\n", debugstr_w(padid->pszDriverAlias));
 163             goto errCleanUp;
 164         }
 165         padid->aFormatTag[ntag].dwFormatTag = aftd.dwFormatTag;
 166         padid->aFormatTag[ntag].cbwfx = aftd.cbFormatSize;
 167     }
 168
 169     acmDriverClose(had, 0);
 170
 171     return TRUE;
 172
 173 errCleanUp:
 174     if (had) acmDriverClose(had, 0);
 175     HeapFree(MSACM_hHeap, 0, padid->aFormatTag);
 176     padid->aFormatTag = NULL;
 177     return FALSE;
 178 }
 179
 180 /***********************************************************************
 181  *           MSACM_GetRegistryKey
 182  */
 183 static  LPWSTR  MSACM_GetRegistryKey(const WINE_ACMDRIVERID* padid)
 184 {
 185     static const WCHAR  baseKey[] = {'S','o','f','t','w','a','r','e','\\','M','i','c','r','o','s','o','f','t','\\',
 186                                      'A','u','d','i','o','C','o','m','p','r','e','s','s','i','o','n','M','a','n','a','g','e','r','\\',
 187                                      'D','r','i','v','e','r','C','a','c','h','e','\\','\0'};
 188     LPWSTR      ret;
 189     int         len;
 190
 191     if (!padid->pszDriverAlias) {
 192         ERR("No alias needed for registry entry\n");
 193         return NULL;
 194     }
 195     len = strlenW(baseKey);
 196     ret = HeapAlloc(MSACM_hHeap, 0, (len + strlenW(padid->pszDriverAlias) + 1) * sizeof(WCHAR));
 197     if (!ret) return NULL;
 198
 199     strcpyW(ret, baseKey);
 200     strcpyW(ret + len, padid->pszDriverAlias);
 201     CharLowerW(ret + len);
 202     return ret;
 203 }
 204
 205 /***********************************************************************
 206  *           MSACM_ReadCache
 207  */
 208 static BOOL MSACM_ReadCache(PWINE_ACMDRIVERID padid)
 209 {
 210     LPWSTR      key = MSACM_GetRegistryKey(padid);
 211     HKEY        hKey;
 212     DWORD       type, size;
 213
 214     if (!key) return FALSE;
 215
 216     padid->aFormatTag = NULL;
 217
 218     if (RegCreateKeyW(HKEY_LOCAL_MACHINE, key, &hKey))
 219         goto errCleanUp;
 220
 221     size = sizeof(padid->cFormatTags);
 222     if (RegQueryValueExA(hKey, "cFormatTags", 0, &type, (void*)&padid->cFormatTags, &size))
 223         goto errCleanUp;
 224     size = sizeof(padid->cFilterTags);
 225     if (RegQueryValueExA(hKey, "cFilterTags", 0, &type, (void*)&padid->cFilterTags, &size))
 226         goto errCleanUp;
 227     size = sizeof(padid->fdwSupport);
 228     if (RegQueryValueExA(hKey, "fdwSupport", 0, &type, (void*)&padid->fdwSupport, &size))
 229         goto errCleanUp;
 230
 231     if (padid->cFormatTags > 0) {
 232         size = padid->cFormatTags * sizeof(padid->aFormatTag[0]);
 233         padid->aFormatTag = HeapAlloc(MSACM_hHeap, HEAP_ZERO_MEMORY, size);
 234         if (!padid->aFormatTag) goto errCleanUp;
 235         if (RegQueryValueExA(hKey, "aFormatTagCache", 0, &type, (void*)padid->aFormatTag, &size))
 236             goto errCleanUp;
 237     }
 238     HeapFree(MSACM_hHeap, 0, key);
 239     return TRUE;
 240
 241  errCleanUp:
 242     HeapFree(MSACM_hHeap, 0, key);
 243     HeapFree(MSACM_hHeap, 0, padid->aFormatTag);
 244     padid->aFormatTag = NULL;
 245     RegCloseKey(hKey);
 246     return FALSE;
 247 }
 248
 249 /***********************************************************************
 250  *           MSACM_WriteCache
 251  */
 252 static  BOOL MSACM_WriteCache(const WINE_ACMDRIVERID *padid)
 253 {
 254     LPWSTR      key = MSACM_GetRegistryKey(padid);
 255     HKEY        hKey;
 256
 257     if (!key) return FALSE;
 258
 259     if (RegCreateKeyW(HKEY_LOCAL_MACHINE, key, &hKey))
 260         goto errCleanUp;
 261
 262     if (RegSetValueExA(hKey, "cFormatTags", 0, REG_DWORD, (const void*)&padid->cFormatTags, sizeof(DWORD)))
 263         goto errCleanUp;
 264     if (RegSetValueExA(hKey, "cFilterTags", 0, REG_DWORD, (const void*)&padid->cFilterTags, sizeof(DWORD)))
 265         goto errCleanUp;
 266     if (RegSetValueExA(hKey, "fdwSupport", 0, REG_DWORD, (const void*)&padid->fdwSupport, sizeof(DWORD)))
 267         goto errCleanUp;
 268     if (RegSetValueExA(hKey, "aFormatTagCache", 0, REG_BINARY,
 269                        (void*)padid->aFormatTag,
 270                        padid->cFormatTags * sizeof(padid->aFormatTag[0])))
 271         goto errCleanUp;
 272     HeapFree(MSACM_hHeap, 0, key);
 273     return TRUE;
 274
 275  errCleanUp:
 276     HeapFree(MSACM_hHeap, 0, key);
 277     return FALSE;
 278 }
 279
 280 /***********************************************************************
 281  *           MSACM_RegisterDriver()
 282  */
 283 PWINE_ACMDRIVERID MSACM_RegisterDriver(LPCWSTR pszDriverAlias, LPCWSTR pszFileName,
 284                                        PWINE_ACMLOCALDRIVER pLocalDriver)
 285 {
 286     PWINE_ACMDRIVERID   padid;
 287
 288     TRACE("(%s, %s, %p)\n",
 289           debugstr_w(pszDriverAlias), debugstr_w(pszFileName), pLocalDriver);
 290
 291     padid = HeapAlloc(MSACM_hHeap, 0, sizeof(WINE_ACMDRIVERID));
 292     padid->obj.dwType = WINE_ACMOBJ_DRIVERID;
 293     padid->obj.pACMDriverID = padid;
 294     padid->pszDriverAlias = NULL;
 295     if (pszDriverAlias)
 296     {
 297         padid->pszDriverAlias = HeapAlloc( MSACM_hHeap, 0, (strlenW(pszDriverAlias)+1) * sizeof(WCHAR) );
 298         strcpyW( padid->pszDriverAlias, pszDriverAlias );
 299     }
 300     padid->pszFileName = NULL;
 301     if (pszFileName)
 302     {
 303         padid->pszFileName = HeapAlloc( MSACM_hHeap, 0, (strlenW(pszFileName)+1) * sizeof(WCHAR) );
 304         strcpyW( padid->pszFileName, pszFileName );
 305     }
 306     padid->pLocalDriver = pLocalDriver;
 307
 308     padid->pACMDriverList = NULL;
 309
 310     if (pLocalDriver) {
 311         padid->pPrevACMDriverID = NULL;
 312         padid->pNextACMDriverID = MSACM_pFirstACMDriverID;
 313         if (MSACM_pFirstACMDriverID)
 314             MSACM_pFirstACMDriverID->pPrevACMDriverID = padid;
 315         MSACM_pFirstACMDriverID = padid;
 316         if (!MSACM_pLastACMDriverID)
 317             MSACM_pLastACMDriverID = padid;
 318     } else {
 319         padid->pNextACMDriverID = NULL;
 320         padid->pPrevACMDriverID = MSACM_pLastACMDriverID;
 321         if (MSACM_pLastACMDriverID)
 322             MSACM_pLastACMDriverID->pNextACMDriverID = padid;
 323         MSACM_pLastACMDriverID = padid;
 324         if (!MSACM_pFirstACMDriverID)
 325             MSACM_pFirstACMDriverID = padid;
 326     }
 327     /* disable the driver if we cannot load the cache */
 328     if ((!padid->pszDriverAlias || !MSACM_ReadCache(padid)) && !MSACM_FillCache(padid)) {
 329         WARN("Couldn't load cache for ACM driver (%s)\n", debugstr_w(pszFileName));
 330         MSACM_UnregisterDriver(padid);
 331         return NULL;
 332     }
 333
 334     if (pLocalDriver) padid->fdwSupport |= ACMDRIVERDETAILS_SUPPORTF_LOCAL;
 335     return padid;
 336 }
 337
 338 /***********************************************************************
 339  *           MSACM_RegisterAllDrivers()
 340  */
 341 void MSACM_RegisterAllDrivers(void)
 342 {
 343     static const WCHAR msacm32[] = {'m','s','a','c','m','3','2','.','d','l','l','\0'};
 344     static const WCHAR msacmW[] = {'M','S','A','C','M','.'};
 345     static const WCHAR drv32[] = {'d','r','i','v','e','r','s','3','2','\0'};
 346     static const WCHAR sys[] = {'s','y','s','t','e','m','.','i','n','i','\0'};
 347     static const WCHAR drvkey[] = {'S','o','f','t','w','a','r','e','\\',
 348                                    'M','i','c','r','o','s','o','f','t','\\',
 349                                    'W','i','n','d','o','w','s',' ','N','T','\\',
 350                                    'C','u','r','r','e','n','t','V','e','r','s','i','o','n','\\',
 351                                    'D','r','i','v','e','r','s','3','2','\0'};
 352     DWORD i, cnt = 0, bufLen, lRet;
 353     WCHAR buf[2048], *name, *s;
 354     FILETIME lastWrite;
 355     HKEY hKey;
 356
 357     /* FIXME: What if the user edits system.ini while the program is running?
 358      * Does Windows handle that?  */
 359     if (MSACM_pFirstACMDriverID) return;
 360
 361     lRet = RegOpenKeyExW(HKEY_LOCAL_MACHINE, drvkey, 0, KEY_QUERY_VALUE, &hKey);
 362     if (lRet == ERROR_SUCCESS) {
 363         RegQueryInfoKeyW( hKey, 0, 0, 0, &cnt, 0, 0, 0, 0, 0, 0, 0);
 364         for (i = 0; i < cnt; i++) {
 365             bufLen = sizeof(buf) / sizeof(buf[0]);
 366             lRet = RegEnumKeyExW(hKey, i, buf, &bufLen, 0, 0, 0, &lastWrite);
 367             if (lRet != ERROR_SUCCESS) continue;
 368             if (strncmpiW(buf, msacmW, sizeof(msacmW)/sizeof(msacmW[0]))) continue;
 369             if (!(name = strchrW(buf, '='))) continue;
 370             *name = 0;
 371             MSACM_RegisterDriver(buf, name + 1, 0);
 372         }
 373         RegCloseKey( hKey );
 374     }
 375
 376     if (GetPrivateProfileSectionW(drv32, buf, sizeof(buf)/sizeof(buf[0]), sys))
 377     {
 378         for(s = buf; *s;  s += strlenW(s) + 1)
 379         {
 380             if (strncmpiW(s, msacmW, sizeof(msacmW)/sizeof(msacmW[0]))) continue;
 381             if (!(name = strchrW(s, '='))) continue;
 382             *name = 0;
 383             MSACM_RegisterDriver(s, name + 1, 0);
 384             *name = '=';
 385         }
 386     }
 387     MSACM_ReorderDriversByPriority();
 388     MSACM_RegisterDriver(msacm32, msacm32, 0);
 389 }
 390
 391 /***********************************************************************
 392  *           MSACM_RegisterNotificationWindow()
 393  */
 394 PWINE_ACMNOTIFYWND MSACM_RegisterNotificationWindow(HWND hNotifyWnd, DWORD dwNotifyMsg)
 395 {
 396     PWINE_ACMNOTIFYWND  panwnd;
 397
 398     TRACE("(%p,0x%08x)\n", hNotifyWnd, dwNotifyMsg);
 399
 400     panwnd = HeapAlloc(MSACM_hHeap, 0, sizeof(WINE_ACMNOTIFYWND));
 401     panwnd->obj.dwType = WINE_ACMOBJ_NOTIFYWND;
 402     panwnd->obj.pACMDriverID = 0;
 403     panwnd->hNotifyWnd = hNotifyWnd;
 404     panwnd->dwNotifyMsg = dwNotifyMsg;
 405     panwnd->fdwSupport = 0;
 406
 407     panwnd->pNextACMNotifyWnd = NULL;
 408     panwnd->pPrevACMNotifyWnd = MSACM_pLastACMNotifyWnd;
 409     if (MSACM_pLastACMNotifyWnd)
 410         MSACM_pLastACMNotifyWnd->pNextACMNotifyWnd = panwnd;
 411     MSACM_pLastACMNotifyWnd = panwnd;
 412     if (!MSACM_pFirstACMNotifyWnd)
 413         MSACM_pFirstACMNotifyWnd = panwnd;
 414
 415     return panwnd;
 416 }
 417
 418 /***********************************************************************
 419  *           MSACM_BroadcastNotification()
 420  */
 421 void MSACM_BroadcastNotification(void)
 422 {
 423     if (MSACM_suspendBroadcastCount <= 0) {
 424         PWINE_ACMNOTIFYWND panwnd;
 425
 426         for (panwnd = MSACM_pFirstACMNotifyWnd; panwnd; panwnd = panwnd->pNextACMNotifyWnd)
 427         if (!(panwnd->fdwSupport & ACMDRIVERDETAILS_SUPPORTF_DISABLED))
 428             SendMessageW(panwnd->hNotifyWnd, panwnd->dwNotifyMsg, 0, 0);
 429     } else {
 430         MSACM_pendingBroadcast = TRUE;
 431     }
 432 }
 433
 434 /***********************************************************************
 435  *           MSACM_DisableNotifications()
 436  */
 437 void MSACM_DisableNotifications(void)
 438 {
 439     MSACM_suspendBroadcastCount++;
 440 }
 441
 442 /***********************************************************************
 443  *           MSACM_EnableNotifications()
 444  */
 445 void MSACM_EnableNotifications(void)
 446 {
 447     if (MSACM_suspendBroadcastCount > 0) {
 448         MSACM_suspendBroadcastCount--;
 449         if (MSACM_suspendBroadcastCount == 0 && MSACM_pendingBroadcast) {
 450             MSACM_pendingBroadcast = FALSE;
 451             MSACM_BroadcastNotification();
 452         }
 453     }
 454 }
 455
 456 /***********************************************************************
 457  *           MSACM_UnRegisterNotificationWindow()
 458  */
 459 PWINE_ACMNOTIFYWND MSACM_UnRegisterNotificationWindow(const WINE_ACMNOTIFYWND *panwnd)
 460 {
 461     PWINE_ACMNOTIFYWND p;
 462
 463     for (p = MSACM_pFirstACMNotifyWnd; p; p = p->pNextACMNotifyWnd) {
 464         if (p == panwnd) {
 465             PWINE_ACMNOTIFYWND pNext = p->pNextACMNotifyWnd;
 466
 467             if (p->pPrevACMNotifyWnd) p->pPrevACMNotifyWnd->pNextACMNotifyWnd = p->pNextACMNotifyWnd;
 468             if (p->pNextACMNotifyWnd) p->pNextACMNotifyWnd->pPrevACMNotifyWnd = p->pPrevACMNotifyWnd;
 469             if (MSACM_pFirstACMNotifyWnd == p) MSACM_pFirstACMNotifyWnd = p->pNextACMNotifyWnd;
 470             if (MSACM_pLastACMNotifyWnd == p) MSACM_pLastACMNotifyWnd = p->pPrevACMNotifyWnd;
 471             HeapFree(MSACM_hHeap, 0, p);
 472
 473             return pNext;
 474         }
 475     }
 476     return NULL;
 477 }
 478
 479 /***********************************************************************
 480  *           MSACM_RePositionDriver()
 481  */
 482 void MSACM_RePositionDriver(PWINE_ACMDRIVERID padid, DWORD dwPriority)
 483 {
 484     PWINE_ACMDRIVERID pTargetPosition = NULL;
 485
 486     /* Remove selected driver from linked list */
 487     if (MSACM_pFirstACMDriverID == padid) {
 488         MSACM_pFirstACMDriverID = padid->pNextACMDriverID;
 489     }
 490     if (MSACM_pLastACMDriverID == padid) {
 491         MSACM_pLastACMDriverID = padid->pPrevACMDriverID;
 492     }
 493     if (padid->pPrevACMDriverID != NULL) {
 494         padid->pPrevACMDriverID->pNextACMDriverID = padid->pNextACMDriverID;
 495     }
 496     if (padid->pNextACMDriverID != NULL) {
 497         padid->pNextACMDriverID->pPrevACMDriverID = padid->pPrevACMDriverID;
 498     }
 499
 500     /* Look up position where selected driver should be */
 501     if (dwPriority == 1) {
 502         pTargetPosition = padid->pPrevACMDriverID;
 503         while (pTargetPosition->pPrevACMDriverID != NULL &&
 504             !(pTargetPosition->pPrevACMDriverID->fdwSupport & ACMDRIVERDETAILS_SUPPORTF_LOCAL)) {
 505             pTargetPosition = pTargetPosition->pPrevACMDriverID;
 506         }
 507     } else if (dwPriority == -1) {
 508         pTargetPosition = padid->pNextACMDriverID;
 509         while (pTargetPosition->pNextACMDriverID != NULL) {
 510             pTargetPosition = pTargetPosition->pNextACMDriverID;
 511         }
 512     }
 513
 514     /* Place selected driver in selected position */
 515     padid->pPrevACMDriverID = pTargetPosition->pPrevACMDriverID;
 516     padid->pNextACMDriverID = pTargetPosition;
 517     if (padid->pPrevACMDriverID != NULL) {
 518         padid->pPrevACMDriverID->pNextACMDriverID = padid;
 519     } else {
 520         MSACM_pFirstACMDriverID = padid;
 521     }
 522     if (padid->pNextACMDriverID != NULL) {
 523         padid->pNextACMDriverID->pPrevACMDriverID = padid;
 524     } else {
 525         MSACM_pLastACMDriverID = padid;
 526     }
 527 }
 528
 529 /***********************************************************************
 530  *           MSACM_ReorderDriversByPriority()
 531  * Reorders all drivers based on the priority list indicated by the registry key:
 532  * HKCU\\Software\\Microsoft\\Multimedia\\Audio Compression Manager\\Priority v4.00
 533  */
 534 static void MSACM_ReorderDriversByPriority(void)
 535 {
 536     PWINE_ACMDRIVERID   padid;
 537     unsigned int iNumDrivers;
 538     PWINE_ACMDRIVERID * driverList = NULL;
 539     HKEY hPriorityKey = NULL;
 540
 541     TRACE("\n");
 542
 543     /* Count drivers && alloc corresponding memory for list */
 544     iNumDrivers = 0;
 545     for (padid = MSACM_pFirstACMDriverID; padid; padid = padid->pNextACMDriverID) iNumDrivers++;
 546     if (iNumDrivers > 1)
 547     {
 548         LONG lError;
 549         static const WCHAR basePriorityKey[] = {
 550             'S','o','f','t','w','a','r','e','\\',
 551             'M','i','c','r','o','s','o','f','t','\\',
 552             'M','u','l','t','i','m','e','d','i','a','\\',
 553             'A','u','d','i','o',' ','C','o','m','p','r','e','s','s','i','o','n',' ','M','a','n','a','g','e','r','\\',
 554             'P','r','i','o','r','i','t','y',' ','v','4','.','0','0','\0'
 555         };
 556         unsigned int i;
 557         LONG lBufferLength;
 558         WCHAR szBuffer[256];
 559
 560         driverList = HeapAlloc(MSACM_hHeap, 0, iNumDrivers * sizeof(PWINE_ACMDRIVERID));
 561         if (!driverList)
 562         {
 563             ERR("out of memory\n");
 564             goto errCleanUp;
 565         }
 566
 567         lError = RegOpenKeyW(HKEY_CURRENT_USER, basePriorityKey, &hPriorityKey);
 568         if (lError != ERROR_SUCCESS) {
 569             TRACE("RegOpenKeyW failed, possibly key does not exist yet\n");
 570             hPriorityKey = NULL;
 571             goto errCleanUp;
 572         }
 573
 574         /* Copy drivers into list to simplify linked list modification */
 575         for (i = 0, padid = MSACM_pFirstACMDriverID; padid; padid = padid->pNextACMDriverID, i++)
 576         {
 577             driverList[i] = padid;
 578         }
 579
 580         /* Query each of the priorities in turn. Alias key is in lowercase.
 581             The general form of the priority record is the following:
 582             "PriorityN" --> "1, msacm.driveralias"
 583             where N is an integer, and the value is a string of the driver
 584             alias, prefixed by "1, " for an enabled driver, or "0, " for a
 585             disabled driver.
 586             */
 587         for (i = 0; i < iNumDrivers; i++)
 588         {
 589             static const WCHAR priorityTmpl[] = {'P','r','i','o','r','i','t','y','%','l','d','\0'};
 590             WCHAR szSubKey[17];
 591             unsigned int iTargetPosition;
 592             unsigned int iCurrentPosition;
 593             WCHAR * pAlias;
 594             static const WCHAR sPrefix[] = {'m','s','a','c','m','.','\0'};
 595
 596             /* Build expected entry name */
 597             snprintfW(szSubKey, 17, priorityTmpl, i + 1);
 598             lBufferLength = sizeof(szBuffer);
 599             lError = RegQueryValueExW(hPriorityKey, szSubKey, NULL, NULL, (LPBYTE)szBuffer, (LPDWORD)&lBufferLength);
 600             if (lError != ERROR_SUCCESS) continue;
 601
 602             /* Recovered driver alias should be at this position */
 603             iTargetPosition = i;
 604
 605             /* Locate driver alias in driver list */
 606             pAlias = strstrW(szBuffer, sPrefix);
 607             if (pAlias == NULL) continue;
 608
 609             for (iCurrentPosition = 0; iCurrentPosition < iNumDrivers; iCurrentPosition++) {
 610                 if (strcmpiW(driverList[iCurrentPosition]->pszDriverAlias, pAlias) == 0)
 611                     break;
 612             }
 613             if (iCurrentPosition < iNumDrivers && iTargetPosition != iCurrentPosition) {
 614                 padid = driverList[iTargetPosition];
 615                 driverList[iTargetPosition] = driverList[iCurrentPosition];
 616                 driverList[iCurrentPosition] = padid;
 617
 618                 /* Locate enabled status */
 619                 if (szBuffer[0] == '1') {
 620                     driverList[iTargetPosition]->fdwSupport &= ~ACMDRIVERDETAILS_SUPPORTF_DISABLED;
 621                 } else if (szBuffer[0] == '0') {
 622                     driverList[iTargetPosition]->fdwSupport |= ACMDRIVERDETAILS_SUPPORTF_DISABLED;
 623                 }
 624             }
 625         }
 626
 627         /* Re-assign pointers so that linked list traverses the ordered array */
 628         for (i = 0; i < iNumDrivers; i++) {
 629             driverList[i]->pPrevACMDriverID = (i > 0) ? driverList[i - 1] : NULL;
 630             driverList[i]->pNextACMDriverID = (i < iNumDrivers - 1) ? driverList[i + 1] : NULL;
 631         }
 632         MSACM_pFirstACMDriverID = driverList[0];
 633         MSACM_pLastACMDriverID = driverList[iNumDrivers - 1];
 634     }
 635
 636 errCleanUp:
 637     if (hPriorityKey != NULL) RegCloseKey(hPriorityKey);
 638     HeapFree(MSACM_hHeap, 0, driverList);
 639 }
 640
 641 /***********************************************************************
 642  *           MSACM_WriteCurrentPriorities()
 643  * Writes out current order of driver priorities to registry key:
 644  * HKCU\\Software\\Microsoft\\Multimedia\\Audio Compression Manager\\Priority v4.00
 645  */
 646 void MSACM_WriteCurrentPriorities(void)
 647 {
 648     LONG lError;
 649     HKEY hPriorityKey;
 650     static const WCHAR basePriorityKey[] = {
 651         'S','o','f','t','w','a','r','e','\\',
 652         'M','i','c','r','o','s','o','f','t','\\',
 653         'M','u','l','t','i','m','e','d','i','a','\\',
 654         'A','u','d','i','o',' ','C','o','m','p','r','e','s','s','i','o','n',' ','M','a','n','a','g','e','r','\\',
 655         'P','r','i','o','r','i','t','y',' ','v','4','.','0','0','\0'
 656     };
 657     PWINE_ACMDRIVERID padid;
 658     DWORD dwPriorityCounter;
 659     static const WCHAR priorityTmpl[] = {'P','r','i','o','r','i','t','y','%','l','d','\0'};
 660     static const WCHAR valueTmpl[] = {'%','c',',',' ','%','s','\0'};
 661     static const WCHAR converterAlias[] = {'I','n','t','e','r','n','a','l',' ','P','C','M',' ','C','o','n','v','e','r','t','e','r','\0'};
 662     WCHAR szSubKey[17];
 663     WCHAR szBuffer[256];
 664
 665     /* Delete ACM priority key and create it anew */
 666     lError = RegDeleteKeyW(HKEY_CURRENT_USER, basePriorityKey);
 667     if (lError != ERROR_SUCCESS && lError != ERROR_FILE_NOT_FOUND) {
 668         ERR("unable to remove current key %s (0x%08x) - priority changes won't persist past application end.\n",
 669             debugstr_w(basePriorityKey), lError);
 670         return;
 671     }
 672     lError = RegCreateKeyW(HKEY_CURRENT_USER, basePriorityKey, &hPriorityKey);
 673     if (lError != ERROR_SUCCESS) {
 674         ERR("unable to create key %s (0x%08x) - priority changes won't persist past application end.\n",
 675             debugstr_w(basePriorityKey), lError);
 676         return;
 677     }
 678
 679     /* Write current list of priorities */
 680     for (dwPriorityCounter = 0, padid = MSACM_pFirstACMDriverID; padid; padid = padid->pNextACMDriverID) {
 681         if (padid->fdwSupport & ACMDRIVERDETAILS_SUPPORTF_LOCAL) continue;
 682         if (padid->pszDriverAlias == NULL) continue;    /* internal PCM converter is last */
 683
 684         /* Build required value name */
 685         dwPriorityCounter++;
 686         snprintfW(szSubKey, 17, priorityTmpl, dwPriorityCounter);
 687
 688         /* Value has a 1 in front for enabled drivers and 0 for disabled drivers */
 689         snprintfW(szBuffer, 256, valueTmpl, (padid->fdwSupport & ACMDRIVERDETAILS_SUPPORTF_DISABLED) ? '0' : '1', padid->pszDriverAlias);
 690         strlwrW(szBuffer);
 691
 692         lError = RegSetValueExW(hPriorityKey, szSubKey, 0, REG_SZ, (BYTE *)szBuffer, (strlenW(szBuffer) + 1) * sizeof(WCHAR));
 693         if (lError != ERROR_SUCCESS) {
 694             ERR("unable to write value for %s under key %s (0x%08x)\n",
 695                 debugstr_w(padid->pszDriverAlias), debugstr_w(basePriorityKey), lError);
 696         }
 697     }
 698
 699     /* Build required value name */
 700     dwPriorityCounter++;
 701     snprintfW(szSubKey, 17, priorityTmpl, dwPriorityCounter);
 702
 703     /* Value has a 1 in front for enabled drivers and 0 for disabled drivers */
 704     snprintfW(szBuffer, 256, valueTmpl, '1', converterAlias);
 705
 706     lError = RegSetValueExW(hPriorityKey, szSubKey, 0, REG_SZ, (BYTE *)szBuffer, (strlenW(szBuffer) + 1) * sizeof(WCHAR));
 707     if (lError != ERROR_SUCCESS) {
 708         ERR("unable to write value for %s under key %s (0x%08x)\n",
 709             debugstr_w(converterAlias), debugstr_w(basePriorityKey), lError);
 710     }
 711     RegCloseKey(hPriorityKey);
 712 }
 713
 714 static PWINE_ACMLOCALDRIVER MSACM_pFirstACMLocalDriver;
 715 static PWINE_ACMLOCALDRIVER MSACM_pLastACMLocalDriver;
 716
 717 static PWINE_ACMLOCALDRIVER MSACM_UnregisterLocalDriver(PWINE_ACMLOCALDRIVER paldrv)
 718 {
 719     PWINE_ACMLOCALDRIVER pNextACMLocalDriver;
 720
 721     if (paldrv->pACMInstList) {
 722         ERR("local driver instances still present after closing all drivers - memory leak\n");
 723         return NULL;
 724     }
 725
 726     if (paldrv == MSACM_pFirstACMLocalDriver)
 727         MSACM_pFirstACMLocalDriver = paldrv->pNextACMLocalDrv;
 728     if (paldrv == MSACM_pLastACMLocalDriver)
 729         MSACM_pLastACMLocalDriver = paldrv->pPrevACMLocalDrv;
 730
 731     if (paldrv->pPrevACMLocalDrv)
 732         paldrv->pPrevACMLocalDrv->pNextACMLocalDrv = paldrv->pNextACMLocalDrv;
 733     if (paldrv->pNextACMLocalDrv)
 734         paldrv->pNextACMLocalDrv->pPrevACMLocalDrv = paldrv->pPrevACMLocalDrv;
 735
 736     pNextACMLocalDriver = paldrv->pNextACMLocalDrv;
 737
 738     HeapFree(MSACM_hHeap, 0, paldrv);
 739
 740     return pNextACMLocalDriver;
 741 }
 742
 743 /***********************************************************************
 744  *           MSACM_UnregisterDriver()
 745  */
 746 PWINE_ACMDRIVERID MSACM_UnregisterDriver(PWINE_ACMDRIVERID p)
 747 {
 748     PWINE_ACMDRIVERID pNextACMDriverID;
 749
 750     while (p->pACMDriverList)
 751         acmDriverClose((HACMDRIVER) p->pACMDriverList, 0);
 752
 753     HeapFree(MSACM_hHeap, 0, p->pszDriverAlias);
 754     HeapFree(MSACM_hHeap, 0, p->pszFileName);
 755     HeapFree(MSACM_hHeap, 0, p->aFormatTag);
 756
 757     if (p == MSACM_pFirstACMDriverID)
 758         MSACM_pFirstACMDriverID = p->pNextACMDriverID;
 759     if (p == MSACM_pLastACMDriverID)
 760         MSACM_pLastACMDriverID = p->pPrevACMDriverID;
 761
 762     if (p->pPrevACMDriverID)
 763         p->pPrevACMDriverID->pNextACMDriverID = p->pNextACMDriverID;
 764     if (p->pNextACMDriverID)
 765         p->pNextACMDriverID->pPrevACMDriverID = p->pPrevACMDriverID;
 766
 767     pNextACMDriverID = p->pNextACMDriverID;
 768
 769     if (p->pLocalDriver) MSACM_UnregisterLocalDriver(p->pLocalDriver);
 770     HeapFree(MSACM_hHeap, 0, p);
 771
 772     return pNextACMDriverID;
 773 }
 774
 775 /***********************************************************************
 776  *           MSACM_UnregisterAllDrivers()
 777  */
 778 void MSACM_UnregisterAllDrivers(void)
 779 {
 780     PWINE_ACMNOTIFYWND panwnd = MSACM_pFirstACMNotifyWnd;
 781     PWINE_ACMDRIVERID p = MSACM_pFirstACMDriverID;
 782
 783     while (p) {
 784         MSACM_WriteCache(p);
 785         p = MSACM_UnregisterDriver(p);
 786     }
 787
 788     while (panwnd) {
 789         panwnd = MSACM_UnRegisterNotificationWindow(panwnd);
 790     }
 791 }
 792
 793 /***********************************************************************
 794  *           MSACM_GetObj()
 795  */
 796 PWINE_ACMOBJ MSACM_GetObj(HACMOBJ hObj, DWORD type)
 797 {
 798     PWINE_ACMOBJ        pao = (PWINE_ACMOBJ)hObj;
 799
 800     if (pao == NULL || IsBadReadPtr(pao, sizeof(WINE_ACMOBJ)) ||
 801         ((type != WINE_ACMOBJ_DONTCARE) && (type != pao->dwType)))
 802         return NULL;
 803     return pao;
 804 }
 805
 806 /***********************************************************************
 807  *           MSACM_GetDriverID()
 808  */
 809 PWINE_ACMDRIVERID MSACM_GetDriverID(HACMDRIVERID hDriverID)
 810 {
 811     return (PWINE_ACMDRIVERID)MSACM_GetObj((HACMOBJ)hDriverID, WINE_ACMOBJ_DRIVERID);
 812 }
 813
 814 /***********************************************************************
 815  *           MSACM_GetDriver()
 816  */
 817 PWINE_ACMDRIVER MSACM_GetDriver(HACMDRIVER hDriver)
 818 {
 819     return (PWINE_ACMDRIVER)MSACM_GetObj((HACMOBJ)hDriver, WINE_ACMOBJ_DRIVER);
 820 }
 821
 822 /***********************************************************************
 823  *           MSACM_GetNotifyWnd()
 824  */
 825 PWINE_ACMNOTIFYWND MSACM_GetNotifyWnd(HACMDRIVERID hDriver)
 826 {
 827     return (PWINE_ACMNOTIFYWND)MSACM_GetObj((HACMOBJ)hDriver, WINE_ACMOBJ_NOTIFYWND);
 828 }
 829
 830 /***********************************************************************
 831  *           MSACM_GetLocalDriver()
 832  */
 833 /*
 834 PWINE_ACMLOCALDRIVER MSACM_GetLocalDriver(HACMDRIVER hDriver)
 835 {
 836     return (PWINE_ACMLOCALDRIVER)MSACM_GetObj((HACMOBJ)hDriver, WINE_ACMOBJ_LOCALDRIVER);
 837 }
 838 */
 839 #define MSACM_DRIVER_SendMessage(PDRVRINST, msg, lParam1, lParam2) \
 840         (PDRVRINST)->pLocalDriver->lpDrvProc((PDRVRINST)->dwDriverID, (HDRVR)(PDRVRINST), msg, lParam1, lParam2)
 841
 842 /***********************************************************************
 843  *           MSACM_Message()
 844  */
 845 MMRESULT MSACM_Message(HACMDRIVER had, UINT uMsg, LPARAM lParam1, LPARAM lParam2)
 846 {
 847     PWINE_ACMDRIVER     pad = MSACM_GetDriver(had);
 848
 849     if (!pad) return MMSYSERR_INVALHANDLE;
 850     if (pad->hDrvr) return SendDriverMessage(pad->hDrvr, uMsg, lParam1, lParam2);
 851     if (pad->pLocalDrvrInst) return MSACM_DRIVER_SendMessage(pad->pLocalDrvrInst, uMsg, lParam1, lParam2);
 852
 853     return MMSYSERR_INVALHANDLE;
 854 }
 855
 856 PWINE_ACMLOCALDRIVER MSACM_RegisterLocalDriver(HMODULE hModule, DRIVERPROC lpDriverProc)
 857 {
 858     PWINE_ACMLOCALDRIVER paldrv;
 859
 860     TRACE("(%p, %p)\n", hModule, lpDriverProc);
 861     if (!hModule || !lpDriverProc) return NULL;
 862
 863     /* look up previous instance of local driver module */
 864     for (paldrv = MSACM_pFirstACMLocalDriver; paldrv; paldrv = paldrv->pNextACMLocalDrv)
 865     {
 866         if (paldrv->hModule == hModule && paldrv->lpDrvProc == lpDriverProc) return paldrv;
 867     }
 868
 869     paldrv = HeapAlloc(MSACM_hHeap, 0, sizeof(WINE_ACMLOCALDRIVER));
 870     paldrv->obj.dwType = WINE_ACMOBJ_LOCALDRIVER;
 871     paldrv->obj.pACMDriverID = 0;
 872     paldrv->hModule = hModule;
 873     paldrv->lpDrvProc = lpDriverProc;
 874     paldrv->pACMInstList = NULL;
 875
 876     paldrv->pNextACMLocalDrv = NULL;
 877     paldrv->pPrevACMLocalDrv = MSACM_pLastACMLocalDriver;
 878     if (MSACM_pLastACMLocalDriver)
 879         MSACM_pLastACMLocalDriver->pNextACMLocalDrv = paldrv;
 880     MSACM_pLastACMLocalDriver = paldrv;
 881     if (!MSACM_pFirstACMLocalDriver)
 882         MSACM_pFirstACMLocalDriver = paldrv;
 883
 884     return paldrv;
 885 }
 886
 887 /**************************************************************************
 888  *                      MSACM_GetNumberOfModuleRefs             [internal]
 889  *
 890  * Returns the number of open drivers which share the same module.
 891  * Inspired from implementation in dlls/winmm/driver.c
 892  */
 893 static unsigned MSACM_GetNumberOfModuleRefs(HMODULE hModule, DRIVERPROC lpDrvProc, WINE_ACMLOCALDRIVERINST ** found)
 894 {
 895     PWINE_ACMLOCALDRIVER lpDrv;
 896     unsigned            count = 0;
 897
 898     if (found) *found = NULL;
 899     for (lpDrv = MSACM_pFirstACMLocalDriver; lpDrv; lpDrv = lpDrv->pNextACMLocalDrv)
 900     {
 901         if (lpDrv->hModule == hModule && lpDrv->lpDrvProc == lpDrvProc)
 902         {
 903             PWINE_ACMLOCALDRIVERINST pInst = lpDrv->pACMInstList;
 904
 905             while (pInst) {
 906                 if (found && !*found) *found = pInst;
 907                 count++;
 908                 pInst = pInst->pNextACMInst;
 909             }
 910         }
 911     }
 912     return count;
 913 }
 914
 915 /**************************************************************************
 916  *                              MSACM_RemoveFromList            [internal]
 917  *
 918  * Generates all the logic to handle driver closure / deletion
 919  * Removes a driver struct to the list of open drivers.
 920  */
 921 static  BOOL    MSACM_RemoveFromList(PWINE_ACMLOCALDRIVERINST lpDrv)
 922 {
 923     PWINE_ACMLOCALDRIVER pDriverBase = lpDrv->pLocalDriver;
 924     PWINE_ACMLOCALDRIVERINST pPrevInst;
 925
 926     /* last of this driver in list ? */
 927     if (MSACM_GetNumberOfModuleRefs(pDriverBase->hModule, pDriverBase->lpDrvProc, NULL) == 1) {
 928         MSACM_DRIVER_SendMessage(lpDrv, DRV_DISABLE, 0L, 0L);
 929         MSACM_DRIVER_SendMessage(lpDrv, DRV_FREE,    0L, 0L);
 930     }
 931
 932     pPrevInst = NULL;
 933     if (pDriverBase->pACMInstList != lpDrv) {
 934         pPrevInst = pDriverBase->pACMInstList;
 935         while (pPrevInst && pPrevInst->pNextACMInst != lpDrv)
 936             pPrevInst = pPrevInst->pNextACMInst;
 937         if (!pPrevInst) {
 938             ERR("requested to remove invalid instance %p\n", pPrevInst);
 939             return FALSE;
 940         }
 941     }
 942     if (!pPrevInst) {
 943         /* first driver instance on list */
 944         pDriverBase->pACMInstList = lpDrv->pNextACMInst;
 945     } else {
 946         pPrevInst->pNextACMInst = lpDrv->pNextACMInst;
 947     }
 948     return TRUE;
 949 }
 950
 951 /**************************************************************************
 952  *                              MSACM_AddToList         [internal]
 953  *
 954  * Adds a driver struct to the list of open drivers.
 955  * Generates all the logic to handle driver creation / open.
 956  */
 957 static  BOOL    MSACM_AddToList(PWINE_ACMLOCALDRIVERINST lpNewDrv, LPARAM lParam2)
 958 {
 959     PWINE_ACMLOCALDRIVER pDriverBase = lpNewDrv->pLocalDriver;
 960
 961     /* first of this driver in list ? */
 962     if (MSACM_GetNumberOfModuleRefs(pDriverBase->hModule, pDriverBase->lpDrvProc, NULL) == 0) {
 963         if (MSACM_DRIVER_SendMessage(lpNewDrv, DRV_LOAD, 0L, 0L) != DRV_SUCCESS) {
 964             FIXME("DRV_LOAD failed on driver %p\n", lpNewDrv);
 965             return FALSE;
 966         }
 967         /* returned value is not checked */
 968         MSACM_DRIVER_SendMessage(lpNewDrv, DRV_ENABLE, 0L, 0L);
 969     }
 970
 971     lpNewDrv->pNextACMInst = NULL;
 972     if (pDriverBase->pACMInstList == NULL) {
 973         pDriverBase->pACMInstList = lpNewDrv;
 974     } else {
 975         PWINE_ACMLOCALDRIVERINST lpDrvInst = pDriverBase->pACMInstList;
 976
 977         while (lpDrvInst->pNextACMInst != NULL)
 978             lpDrvInst = lpDrvInst->pNextACMInst;
 979
 980         lpDrvInst->pNextACMInst = lpNewDrv;
 981     }
 982
 983     /* Now just open a new instance of a driver on this module */
 984     lpNewDrv->dwDriverID = MSACM_DRIVER_SendMessage(lpNewDrv, DRV_OPEN, 0, lParam2);
 985
 986     if (lpNewDrv->dwDriverID == 0) {
 987         FIXME("DRV_OPEN failed on driver %p\n", lpNewDrv);
 988         MSACM_RemoveFromList(lpNewDrv);
 989         return FALSE;
 990     }
 991     return TRUE;
 992 }
 993
 994 PWINE_ACMLOCALDRIVERINST MSACM_OpenLocalDriver(PWINE_ACMLOCALDRIVER paldrv, LPARAM lParam2)
 995 {
 996     PWINE_ACMLOCALDRIVERINST pDrvInst;
 997
 998     pDrvInst = HeapAlloc(MSACM_hHeap, 0, sizeof(WINE_ACMLOCALDRIVERINST));
 999     pDrvInst->pLocalDriver = paldrv;
1000     pDrvInst->dwDriverID = 0;
1001     pDrvInst->pNextACMInst = NULL;
1002     pDrvInst->bSession = FALSE;
1003
1004     /* Win32 installable drivers must support a two phase opening scheme:
1005      * + first open with NULL as lParam2 (session instance),
1006      * + then do a second open with the real non null lParam2)
1007      */
1008     if (MSACM_GetNumberOfModuleRefs(paldrv->hModule, paldrv->lpDrvProc, NULL) == 0 && lParam2)
1009     {
1010         PWINE_ACMLOCALDRIVERINST   ret;
1011
1012         if (!MSACM_AddToList(pDrvInst, 0L))
1013         {
1014             ERR("load0 failed\n");
1015             goto exit;
1016         }
1017         ret = MSACM_OpenLocalDriver(paldrv, lParam2);
1018         if (!ret)
1019         {
1020             MSACM_CloseLocalDriver(pDrvInst);
1021             ERR("load1 failed\n");
1022             goto exit;
1023         }
1024         pDrvInst->bSession = TRUE;
1025         return ret;
1026     }
1027
1028     if (!MSACM_AddToList(pDrvInst, lParam2))
1029     {
1030         ERR("load failed\n");
1031         goto exit;
1032     }
1033
1034     TRACE("=> %p\n", pDrvInst);
1035     return pDrvInst;
1036 exit:
1037     HeapFree(MSACM_hHeap, 0, pDrvInst);
1038     return NULL;
1039 }
1040
1041 LRESULT MSACM_CloseLocalDriver(PWINE_ACMLOCALDRIVERINST paldrv)
1042 {
1043     if (MSACM_RemoveFromList(paldrv)) {
1044         PWINE_ACMLOCALDRIVERINST lpDrv0;
1045         PWINE_ACMLOCALDRIVER pDriverBase = paldrv->pLocalDriver;
1046
1047         MSACM_DRIVER_SendMessage(paldrv, DRV_CLOSE, 0, 0);
1048         paldrv->dwDriverID = 0;
1049
1050         if (paldrv->bSession)
1051             ERR("should not directly close session instance (%p)\n", paldrv);
1052
1053         /* if driver has an opened session instance, we have to close it too */
1054         if (MSACM_GetNumberOfModuleRefs(pDriverBase->hModule, pDriverBase->lpDrvProc, &lpDrv0) == 1 &&
1055                 lpDrv0->bSession)
1056         {
1057             MSACM_DRIVER_SendMessage(lpDrv0, DRV_CLOSE, 0L, 0L);
1058             lpDrv0->dwDriverID = 0;
1059             MSACM_RemoveFromList(lpDrv0);
1060             HeapFree(GetProcessHeap(), 0, lpDrv0);
1061         }
1062
1063         HeapFree(MSACM_hHeap, 0, paldrv);
1064         return TRUE;
1065     }
1066     ERR("unable to close driver instance\n");
1067     return FALSE;
1068 }