dll/win32/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 #define WIN32_NO_STATUS
  25
  26 #include <stdarg.h>
  27 //#include <string.h>
  28
  29 #include <windef.h>
  30 //#include "winbase.h"
  31 #include <wingdi.h>
  32 #include <winuser.h>
  33 //#include "winerror.h"
  34 #include <winreg.h>
  35 //#include "mmsystem.h"
  36 //#include "mmreg.h"
  37 //#include "msacm.h"
  38 #include <msacmdrv.h>
  39 #include "wineacm.h"
  40 #include <wine/debug.h>
  41 #include <wine/unicode.h>
  42
  43 WINE_DEFAULT_DEBUG_CHANNEL(msacm);
  44
  45 /**********************************************************************/
  46
  47 HANDLE MSACM_hHeap = NULL;
  48 PWINE_ACMDRIVERID MSACM_pFirstACMDriverID = NULL;
  49 static PWINE_ACMDRIVERID MSACM_pLastACMDriverID;
  50
  51 static DWORD MSACM_suspendBroadcastCount = 0;
  52 static BOOL MSACM_pendingBroadcast = FALSE;
  53 static PWINE_ACMNOTIFYWND MSACM_pFirstACMNotifyWnd = NULL;
  54 static PWINE_ACMNOTIFYWND MSACM_pLastACMNotifyWnd = NULL;
  55
  56 static void MSACM_ReorderDriversByPriority(void);
  57
  58 /***********************************************************************
  59  *           MSACM_RegisterDriverFromRegistry()
  60  */
  61 PWINE_ACMDRIVERID MSACM_RegisterDriverFromRegistry(LPCWSTR pszRegEntry)
  62 {
  63     static const WCHAR msacmW[] = {'M','S','A','C','M','.'};
  64     static const WCHAR drvkey[] = {'S','o','f','t','w','a','r','e','\\',
  65                                    'M','i','c','r','o','s','o','f','t','\\',
  66                                    'W','i','n','d','o','w','s',' ','N','T','\\',
  67                                    'C','u','r','r','e','n','t','V','e','r','s','i','o','n','\\',
  68                                    'D','r','i','v','e','r','s','3','2','\0'};
  69     WCHAR buf[2048];
  70     DWORD bufLen, lRet;
  71     HKEY hKey;
  72     PWINE_ACMDRIVERID padid = NULL;
  73
  74     /* The requested registry entry must have the format msacm.XXXXX in order to
  75        be recognized in any future sessions of msacm
  76      */
  77     if (0 == strncmpiW(pszRegEntry, msacmW, sizeof(msacmW)/sizeof(WCHAR))) {
  78         lRet = RegOpenKeyExW(HKEY_LOCAL_MACHINE, drvkey, 0, KEY_QUERY_VALUE, &hKey);
  79         if (lRet != ERROR_SUCCESS) {
  80             WARN("unable to open registry key - 0x%08x\n", lRet);
  81         } else {
  82             bufLen = sizeof(buf);
  83             lRet = RegQueryValueExW(hKey, pszRegEntry, NULL, NULL, (LPBYTE)buf, &bufLen);
  84             if (lRet != ERROR_SUCCESS) {
  85                 WARN("unable to query requested subkey %s - 0x%08x\n", debugstr_w(pszRegEntry), lRet);
  86             } else {
  87                 MSACM_RegisterDriver(pszRegEntry, buf, 0);
  88             }
  89             RegCloseKey( hKey );
  90         }
  91     }
  92     return padid;
  93 }
  94
  95 #if 0
  96 /***********************************************************************
  97  *           MSACM_DumpCache
  98  */
  99 static  void MSACM_DumpCache(PWINE_ACMDRIVERID padid)
 100 {
 101     unsigned    i;
 102
 103     TRACE("cFilterTags=%lu cFormatTags=%lu fdwSupport=%08lx\n",
 104           padid->cFilterTags, padid->cFormatTags, padid->fdwSupport);
 105     for (i = 0; i < padid->cache->cFormatTags; i++) {
 106         TRACE("\tdwFormatTag=%lu cbwfx=%lu\n",
 107               padid->aFormatTag[i].dwFormatTag, padid->aFormatTag[i].cbwfx);
 108     }
 109 }
 110 #endif
 111
 112 /***********************************************************************
 113  *           MSACM_FindFormatTagInCache                 [internal]
 114  *
 115  *      Returns TRUE is the format tag fmtTag is present in the cache.
 116  *      If so, idx is set to its index.
 117  */
 118 BOOL MSACM_FindFormatTagInCache(const WINE_ACMDRIVERID* padid, DWORD fmtTag, LPDWORD idx)
 119 {
 120     unsigned    i;
 121
 122     for (i = 0; i < padid->cFormatTags; i++) {
 123         if (padid->aFormatTag[i].dwFormatTag == fmtTag) {
 124             if (idx) *idx = i;
 125             return TRUE;
 126         }
 127     }
 128     return FALSE;
 129 }
 130
 131 /***********************************************************************
 132  *           MSACM_FillCache
 133  */
 134 static BOOL MSACM_FillCache(PWINE_ACMDRIVERID padid)
 135 {
 136     HACMDRIVER                  had = 0;
 137     unsigned int                        ntag;
 138     ACMDRIVERDETAILSW           add;
 139     ACMFORMATTAGDETAILSW        aftd;
 140
 141     if (acmDriverOpen(&had, (HACMDRIVERID)padid, 0) != 0)
 142         return FALSE;
 143
 144     padid->aFormatTag = NULL;
 145     add.cbStruct = sizeof(add);
 146     if (MSACM_Message(had, ACMDM_DRIVER_DETAILS, (LPARAM)&add,  0))
 147         goto errCleanUp;
 148
 149     if (add.cFormatTags > 0) {
 150         padid->aFormatTag = HeapAlloc(MSACM_hHeap, HEAP_ZERO_MEMORY,
 151                                       add.cFormatTags * sizeof(padid->aFormatTag[0]));
 152         if (!padid->aFormatTag) goto errCleanUp;
 153     }
 154
 155     padid->cFormatTags = add.cFormatTags;
 156     padid->cFilterTags = add.cFilterTags;
 157     padid->fdwSupport  = add.fdwSupport;
 158
 159     aftd.cbStruct = sizeof(aftd);
 160
 161     for (ntag = 0; ntag < add.cFormatTags; ntag++) {
 162         aftd.dwFormatTagIndex = ntag;
 163         if (MSACM_Message(had, ACMDM_FORMATTAG_DETAILS, (LPARAM)&aftd, ACM_FORMATTAGDETAILSF_INDEX)) {
 164             TRACE("IIOs (%s)\n", debugstr_w(padid->pszDriverAlias));
 165             goto errCleanUp;
 166         }
 167         padid->aFormatTag[ntag].dwFormatTag = aftd.dwFormatTag;
 168         padid->aFormatTag[ntag].cbwfx = aftd.cbFormatSize;
 169     }
 170
 171     acmDriverClose(had, 0);
 172
 173     return TRUE;
 174
 175 errCleanUp:
 176     if (had) acmDriverClose(had, 0);
 177     HeapFree(MSACM_hHeap, 0, padid->aFormatTag);
 178     padid->aFormatTag = NULL;
 179     return FALSE;
 180 }
 181
 182 /***********************************************************************
 183  *           MSACM_GetRegistryKey
 184  */
 185 static  LPWSTR  MSACM_GetRegistryKey(const WINE_ACMDRIVERID* padid)
 186 {
 187     static const WCHAR  baseKey[] = {'S','o','f','t','w','a','r','e','\\','M','i','c','r','o','s','o','f','t','\\',
 188                                      'A','u','d','i','o','C','o','m','p','r','e','s','s','i','o','n','M','a','n','a','g','e','r','\\',
 189                                      'D','r','i','v','e','r','C','a','c','h','e','\\','\0'};
 190     LPWSTR      ret;
 191     int         len;
 192
 193     if (!padid->pszDriverAlias) {
 194         ERR("No alias needed for registry entry\n");
 195         return NULL;
 196     }
 197     len = strlenW(baseKey);
 198     ret = HeapAlloc(MSACM_hHeap, 0, (len + strlenW(padid->pszDriverAlias) + 1) * sizeof(WCHAR));
 199     if (!ret) return NULL;
 200
 201     strcpyW(ret, baseKey);
 202     strcpyW(ret + len, padid->pszDriverAlias);
 203     CharLowerW(ret + len);
 204     return ret;
 205 }
 206
 207 /***********************************************************************
 208  *           MSACM_ReadCache
 209  */
 210 static BOOL MSACM_ReadCache(PWINE_ACMDRIVERID padid)
 211 {
 212     LPWSTR      key = MSACM_GetRegistryKey(padid);
 213     HKEY        hKey;
 214     DWORD       type, size;
 215
 216     if (!key) return FALSE;
 217
 218     padid->aFormatTag = NULL;
 219
 220     if (RegCreateKeyW(HKEY_LOCAL_MACHINE, key, &hKey))
 221         goto errCleanUp;
 222
 223     size = sizeof(padid->cFormatTags);
 224     if (RegQueryValueExA(hKey, "cFormatTags", 0, &type, (void*)&padid->cFormatTags, &size))
 225         goto errCleanUp;
 226     size = sizeof(padid->cFilterTags);
 227     if (RegQueryValueExA(hKey, "cFilterTags", 0, &type, (void*)&padid->cFilterTags, &size))
 228         goto errCleanUp;
 229     size = sizeof(padid->fdwSupport);
 230     if (RegQueryValueExA(hKey, "fdwSupport", 0, &type, (void*)&padid->fdwSupport, &size))
 231         goto errCleanUp;
 232
 233     if (padid->cFormatTags > 0) {
 234         size = padid->cFormatTags * sizeof(padid->aFormatTag[0]);
 235         padid->aFormatTag = HeapAlloc(MSACM_hHeap, HEAP_ZERO_MEMORY, size);
 236         if (!padid->aFormatTag) goto errCleanUp;
 237         if (RegQueryValueExA(hKey, "aFormatTagCache", 0, &type, (void*)padid->aFormatTag, &size))
 238             goto errCleanUp;
 239     }
 240     HeapFree(MSACM_hHeap, 0, key);
 241     return TRUE;
 242
 243  errCleanUp:
 244     HeapFree(MSACM_hHeap, 0, key);
 245     HeapFree(MSACM_hHeap, 0, padid->aFormatTag);
 246     padid->aFormatTag = NULL;
 247     RegCloseKey(hKey);
 248     return FALSE;
 249 }
 250
 251 /***********************************************************************
 252  *           MSACM_WriteCache
 253  */
 254 static  BOOL MSACM_WriteCache(const WINE_ACMDRIVERID *padid)
 255 {
 256     LPWSTR      key = MSACM_GetRegistryKey(padid);
 257     HKEY        hKey;
 258
 259     if (!key) return FALSE;
 260
 261     if (RegCreateKeyW(HKEY_LOCAL_MACHINE, key, &hKey))
 262         goto errCleanUp;
 263
 264     if (RegSetValueExA(hKey, "cFormatTags", 0, REG_DWORD, (const void*)&padid->cFormatTags, sizeof(DWORD)))
 265         goto errCleanUp;
 266     if (RegSetValueExA(hKey, "cFilterTags", 0, REG_DWORD, (const void*)&padid->cFilterTags, sizeof(DWORD)))
 267         goto errCleanUp;
 268     if (RegSetValueExA(hKey, "fdwSupport", 0, REG_DWORD, (const void*)&padid->fdwSupport, sizeof(DWORD)))
 269         goto errCleanUp;
 270     if (RegSetValueExA(hKey, "aFormatTagCache", 0, REG_BINARY,
 271                        (void*)padid->aFormatTag,
 272                        padid->cFormatTags * sizeof(padid->aFormatTag[0])))
 273         goto errCleanUp;
 274     HeapFree(MSACM_hHeap, 0, key);
 275     return TRUE;
 276
 277  errCleanUp:
 278     HeapFree(MSACM_hHeap, 0, key);
 279     return FALSE;
 280 }
 281
 282 /***********************************************************************
 283  *           MSACM_RegisterDriver()
 284  */
 285 PWINE_ACMDRIVERID MSACM_RegisterDriver(LPCWSTR pszDriverAlias, LPCWSTR pszFileName,
 286                                        PWINE_ACMLOCALDRIVER pLocalDriver)
 287 {
 288     PWINE_ACMDRIVERID   padid;
 289
 290     TRACE("(%s, %s, %p)\n",
 291           debugstr_w(pszDriverAlias), debugstr_w(pszFileName), pLocalDriver);
 292
 293     padid = HeapAlloc(MSACM_hHeap, 0, sizeof(WINE_ACMDRIVERID));
 294     if (!padid)
 295         return NULL;
 296     padid->obj.dwType = WINE_ACMOBJ_DRIVERID;
 297     padid->obj.pACMDriverID = padid;
 298     padid->pszDriverAlias = NULL;
 299     if (pszDriverAlias)
 300     {
 301         padid->pszDriverAlias = HeapAlloc( MSACM_hHeap, 0, (strlenW(pszDriverAlias)+1) * sizeof(WCHAR) );
 302         if (!padid->pszDriverAlias) {
 303             HeapFree(MSACM_hHeap, 0, padid);
 304             return NULL;
 305         }
 306         strcpyW( padid->pszDriverAlias, pszDriverAlias );
 307     }
 308     padid->pszFileName = NULL;
 309     if (pszFileName)
 310     {
 311         padid->pszFileName = HeapAlloc( MSACM_hHeap, 0, (strlenW(pszFileName)+1) * sizeof(WCHAR) );
 312         if (!padid->pszFileName) {
 313             HeapFree(MSACM_hHeap, 0, padid->pszDriverAlias);
 314             HeapFree(MSACM_hHeap, 0, padid);
 315             return NULL;
 316         }
 317         strcpyW( padid->pszFileName, pszFileName );
 318     }
 319     padid->pLocalDriver = pLocalDriver;
 320
 321     padid->pACMDriverList = NULL;
 322
 323     if (pLocalDriver) {
 324         padid->pPrevACMDriverID = NULL;
 325         padid->pNextACMDriverID = MSACM_pFirstACMDriverID;
 326         if (MSACM_pFirstACMDriverID)
 327             MSACM_pFirstACMDriverID->pPrevACMDriverID = padid;
 328         MSACM_pFirstACMDriverID = padid;
 329         if (!MSACM_pLastACMDriverID)
 330             MSACM_pLastACMDriverID = padid;
 331     } else {
 332         padid->pNextACMDriverID = NULL;
 333         padid->pPrevACMDriverID = MSACM_pLastACMDriverID;
 334         if (MSACM_pLastACMDriverID)
 335             MSACM_pLastACMDriverID->pNextACMDriverID = padid;
 336         MSACM_pLastACMDriverID = padid;
 337         if (!MSACM_pFirstACMDriverID)
 338             MSACM_pFirstACMDriverID = padid;
 339     }
 340     /* disable the driver if we cannot load the cache */
 341     if ((!padid->pszDriverAlias || !MSACM_ReadCache(padid)) && !MSACM_FillCache(padid)) {
 342         WARN("Couldn't load cache for ACM driver (%s)\n", debugstr_w(pszFileName));
 343         MSACM_UnregisterDriver(padid);
 344         return NULL;
 345     }
 346
 347     if (pLocalDriver) padid->fdwSupport |= ACMDRIVERDETAILS_SUPPORTF_LOCAL;
 348     return padid;
 349 }
 350
 351 /***********************************************************************
 352  *           MSACM_RegisterAllDrivers()
 353  */
 354 void MSACM_RegisterAllDrivers(void)
 355 {
 356     static const WCHAR msacm32[] = {'m','s','a','c','m','3','2','.','d','l','l','\0'};
 357     static const WCHAR msacmW[] = {'M','S','A','C','M','.'};
 358     static const WCHAR drv32[] = {'d','r','i','v','e','r','s','3','2','\0'};
 359     static const WCHAR sys[] = {'s','y','s','t','e','m','.','i','n','i','\0'};
 360     static const WCHAR drvkey[] = {'S','o','f','t','w','a','r','e','\\',
 361                                    'M','i','c','r','o','s','o','f','t','\\',
 362                                    'W','i','n','d','o','w','s',' ','N','T','\\',
 363                                    'C','u','r','r','e','n','t','V','e','r','s','i','o','n','\\',
 364                                    'D','r','i','v','e','r','s','3','2','\0'};
 365     DWORD i, cnt = 0, bufLen, lRet;
 366     WCHAR buf[2048], *name, *s;
 367     FILETIME lastWrite;
 368     HKEY hKey;
 369
 370     /* FIXME: What if the user edits system.ini while the program is running?
 371      * Does Windows handle that?  */
 372     if (MSACM_pFirstACMDriverID) return;
 373
 374     lRet = RegOpenKeyExW(HKEY_LOCAL_MACHINE, drvkey, 0, KEY_QUERY_VALUE, &hKey);
 375     if (lRet == ERROR_SUCCESS) {
 376         RegQueryInfoKeyW( hKey, 0, 0, 0, &cnt, 0, 0, 0, 0, 0, 0, 0);
 377         for (i = 0; i < cnt; i++) {
 378             bufLen = sizeof(buf) / sizeof(buf[0]);
 379             lRet = RegEnumKeyExW(hKey, i, buf, &bufLen, 0, 0, 0, &lastWrite);
 380             if (lRet != ERROR_SUCCESS) continue;
 381             if (strncmpiW(buf, msacmW, sizeof(msacmW)/sizeof(msacmW[0]))) continue;
 382             if (!(name = strchrW(buf, '='))) continue;
 383             *name = 0;
 384             MSACM_RegisterDriver(buf, name + 1, 0);
 385         }
 386         RegCloseKey( hKey );
 387     }
 388
 389     if (GetPrivateProfileSectionW(drv32, buf, sizeof(buf)/sizeof(buf[0]), sys))
 390     {
 391         for(s = buf; *s;  s += strlenW(s) + 1)
 392         {
 393             if (strncmpiW(s, msacmW, sizeof(msacmW)/sizeof(msacmW[0]))) continue;
 394             if (!(name = strchrW(s, '='))) continue;
 395             *name = 0;
 396             MSACM_RegisterDriver(s, name + 1, 0);
 397             *name = '=';
 398         }
 399     }
 400     MSACM_ReorderDriversByPriority();
 401     MSACM_RegisterDriver(msacm32, msacm32, 0);
 402 }
 403
 404 /***********************************************************************
 405  *           MSACM_RegisterNotificationWindow()
 406  */
 407 PWINE_ACMNOTIFYWND MSACM_RegisterNotificationWindow(HWND hNotifyWnd, DWORD dwNotifyMsg)
 408 {
 409     PWINE_ACMNOTIFYWND  panwnd;
 410
 411     TRACE("(%p,0x%08x)\n", hNotifyWnd, dwNotifyMsg);
 412
 413     panwnd = HeapAlloc(MSACM_hHeap, 0, sizeof(WINE_ACMNOTIFYWND));
 414     panwnd->obj.dwType = WINE_ACMOBJ_NOTIFYWND;
 415     panwnd->obj.pACMDriverID = 0;
 416     panwnd->hNotifyWnd = hNotifyWnd;
 417     panwnd->dwNotifyMsg = dwNotifyMsg;
 418     panwnd->fdwSupport = 0;
 419
 420     panwnd->pNextACMNotifyWnd = NULL;
 421     panwnd->pPrevACMNotifyWnd = MSACM_pLastACMNotifyWnd;
 422     if (MSACM_pLastACMNotifyWnd)
 423         MSACM_pLastACMNotifyWnd->pNextACMNotifyWnd = panwnd;
 424     MSACM_pLastACMNotifyWnd = panwnd;
 425     if (!MSACM_pFirstACMNotifyWnd)
 426         MSACM_pFirstACMNotifyWnd = panwnd;
 427
 428     return panwnd;
 429 }
 430
 431 /***********************************************************************
 432  *           MSACM_BroadcastNotification()
 433  */
 434 void MSACM_BroadcastNotification(void)
 435 {
 436     if (MSACM_suspendBroadcastCount <= 0) {
 437         PWINE_ACMNOTIFYWND panwnd;
 438
 439         for (panwnd = MSACM_pFirstACMNotifyWnd; panwnd; panwnd = panwnd->pNextACMNotifyWnd)
 440         if (!(panwnd->fdwSupport & ACMDRIVERDETAILS_SUPPORTF_DISABLED))
 441             SendMessageW(panwnd->hNotifyWnd, panwnd->dwNotifyMsg, 0, 0);
 442     } else {
 443         MSACM_pendingBroadcast = TRUE;
 444     }
 445 }
 446
 447 /***********************************************************************
 448  *           MSACM_DisableNotifications()
 449  */
 450 void MSACM_DisableNotifications(void)
 451 {
 452     MSACM_suspendBroadcastCount++;
 453 }
 454
 455 /***********************************************************************
 456  *           MSACM_EnableNotifications()
 457  */
 458 void MSACM_EnableNotifications(void)
 459 {
 460     if (MSACM_suspendBroadcastCount > 0) {
 461         MSACM_suspendBroadcastCount--;
 462         if (MSACM_suspendBroadcastCount == 0 && MSACM_pendingBroadcast) {
 463             MSACM_pendingBroadcast = FALSE;
 464             MSACM_BroadcastNotification();
 465         }
 466     }
 467 }
 468
 469 /***********************************************************************
 470  *           MSACM_UnRegisterNotificationWindow()
 471  */
 472 PWINE_ACMNOTIFYWND MSACM_UnRegisterNotificationWindow(const WINE_ACMNOTIFYWND *panwnd)
 473 {
 474     PWINE_ACMNOTIFYWND p;
 475
 476     for (p = MSACM_pFirstACMNotifyWnd; p; p = p->pNextACMNotifyWnd) {
 477         if (p == panwnd) {
 478             PWINE_ACMNOTIFYWND pNext = p->pNextACMNotifyWnd;
 479
 480             if (p->pPrevACMNotifyWnd) p->pPrevACMNotifyWnd->pNextACMNotifyWnd = p->pNextACMNotifyWnd;
 481             if (p->pNextACMNotifyWnd) p->pNextACMNotifyWnd->pPrevACMNotifyWnd = p->pPrevACMNotifyWnd;
 482             if (MSACM_pFirstACMNotifyWnd == p) MSACM_pFirstACMNotifyWnd = p->pNextACMNotifyWnd;
 483             if (MSACM_pLastACMNotifyWnd == p) MSACM_pLastACMNotifyWnd = p->pPrevACMNotifyWnd;
 484             HeapFree(MSACM_hHeap, 0, p);
 485
 486             return pNext;
 487         }
 488     }
 489     return NULL;
 490 }
 491
 492 /***********************************************************************
 493  *           MSACM_RePositionDriver()
 494  */
 495 void MSACM_RePositionDriver(PWINE_ACMDRIVERID padid, DWORD dwPriority)
 496 {
 497     PWINE_ACMDRIVERID pTargetPosition = NULL;
 498
 499     /* Remove selected driver from linked list */
 500     if (MSACM_pFirstACMDriverID == padid) {
 501         MSACM_pFirstACMDriverID = padid->pNextACMDriverID;
 502     }
 503     if (MSACM_pLastACMDriverID == padid) {
 504         MSACM_pLastACMDriverID = padid->pPrevACMDriverID;
 505     }
 506     if (padid->pPrevACMDriverID != NULL) {
 507         padid->pPrevACMDriverID->pNextACMDriverID = padid->pNextACMDriverID;
 508     }
 509     if (padid->pNextACMDriverID != NULL) {
 510         padid->pNextACMDriverID->pPrevACMDriverID = padid->pPrevACMDriverID;
 511     }
 512
 513     /* Look up position where selected driver should be */
 514     if (dwPriority == 1) {
 515         pTargetPosition = padid->pPrevACMDriverID;
 516         while (pTargetPosition->pPrevACMDriverID != NULL &&
 517             !(pTargetPosition->pPrevACMDriverID->fdwSupport & ACMDRIVERDETAILS_SUPPORTF_LOCAL)) {
 518             pTargetPosition = pTargetPosition->pPrevACMDriverID;
 519         }
 520     } else if (dwPriority == -1) {
 521         pTargetPosition = padid->pNextACMDriverID;
 522         while (pTargetPosition->pNextACMDriverID != NULL) {
 523             pTargetPosition = pTargetPosition->pNextACMDriverID;
 524         }
 525     }
 526
 527     /* Place selected driver in selected position */
 528     padid->pPrevACMDriverID = pTargetPosition->pPrevACMDriverID;
 529     padid->pNextACMDriverID = pTargetPosition;
 530     if (padid->pPrevACMDriverID != NULL) {
 531         padid->pPrevACMDriverID->pNextACMDriverID = padid;
 532     } else {
 533         MSACM_pFirstACMDriverID = padid;
 534     }
 535     if (padid->pNextACMDriverID != NULL) {
 536         padid->pNextACMDriverID->pPrevACMDriverID = padid;
 537     } else {
 538         MSACM_pLastACMDriverID = padid;
 539     }
 540 }
 541
 542 /***********************************************************************
 543  *           MSACM_ReorderDriversByPriority()
 544  * Reorders all drivers based on the priority list indicated by the registry key:
 545  * HKCU\\Software\\Microsoft\\Multimedia\\Audio Compression Manager\\Priority v4.00
 546  */
 547 static void MSACM_ReorderDriversByPriority(void)
 548 {
 549     PWINE_ACMDRIVERID   padid;
 550     unsigned int iNumDrivers;
 551     PWINE_ACMDRIVERID * driverList = NULL;
 552     HKEY hPriorityKey = NULL;
 553
 554     TRACE("\n");
 555
 556     /* Count drivers && alloc corresponding memory for list */
 557     iNumDrivers = 0;
 558     for (padid = MSACM_pFirstACMDriverID; padid; padid = padid->pNextACMDriverID) iNumDrivers++;
 559     if (iNumDrivers > 1)
 560     {
 561         LONG lError;
 562         static const WCHAR basePriorityKey[] = {
 563             'S','o','f','t','w','a','r','e','\\',
 564             'M','i','c','r','o','s','o','f','t','\\',
 565             'M','u','l','t','i','m','e','d','i','a','\\',
 566             'A','u','d','i','o',' ','C','o','m','p','r','e','s','s','i','o','n',' ','M','a','n','a','g','e','r','\\',
 567             'P','r','i','o','r','i','t','y',' ','v','4','.','0','0','\0'
 568         };
 569         unsigned int i;
 570         LONG lBufferLength;
 571         WCHAR szBuffer[256];
 572
 573         driverList = HeapAlloc(MSACM_hHeap, 0, iNumDrivers * sizeof(PWINE_ACMDRIVERID));
 574         if (!driverList)
 575         {
 576             ERR("out of memory\n");
 577             goto errCleanUp;
 578         }
 579
 580         lError = RegOpenKeyW(HKEY_CURRENT_USER, basePriorityKey, &hPriorityKey);
 581         if (lError != ERROR_SUCCESS) {
 582             TRACE("RegOpenKeyW failed, possibly key does not exist yet\n");
 583             hPriorityKey = NULL;
 584             goto errCleanUp;
 585         }
 586
 587         /* Copy drivers into list to simplify linked list modification */
 588         for (i = 0, padid = MSACM_pFirstACMDriverID; padid; padid = padid->pNextACMDriverID, i++)
 589         {
 590             driverList[i] = padid;
 591         }
 592
 593         /* Query each of the priorities in turn. Alias key is in lowercase.
 594             The general form of the priority record is the following:
 595             "PriorityN" --> "1, msacm.driveralias"
 596             where N is an integer, and the value is a string of the driver
 597             alias, prefixed by "1, " for an enabled driver, or "0, " for a
 598             disabled driver.
 599             */
 600         for (i = 0; i < iNumDrivers; i++)
 601         {
 602             static const WCHAR priorityTmpl[] = {'P','r','i','o','r','i','t','y','%','l','d','\0'};
 603             WCHAR szSubKey[17];
 604             unsigned int iTargetPosition;
 605             unsigned int iCurrentPosition;
 606             WCHAR * pAlias;
 607             static const WCHAR sPrefix[] = {'m','s','a','c','m','.','\0'};
 608
 609             /* Build expected entry name */
 610             snprintfW(szSubKey, 17, priorityTmpl, i + 1);
 611             lBufferLength = sizeof(szBuffer);
 612             lError = RegQueryValueExW(hPriorityKey, szSubKey, NULL, NULL, (LPBYTE)szBuffer, (LPDWORD)&lBufferLength);
 613             if (lError != ERROR_SUCCESS) continue;
 614
 615             /* Recovered driver alias should be at this position */
 616             iTargetPosition = i;
 617
 618             /* Locate driver alias in driver list */
 619             pAlias = strstrW(szBuffer, sPrefix);
 620             if (pAlias == NULL) continue;
 621
 622             for (iCurrentPosition = 0; iCurrentPosition < iNumDrivers; iCurrentPosition++) {
 623                 if (strcmpiW(driverList[iCurrentPosition]->pszDriverAlias, pAlias) == 0)
 624                     break;
 625             }
 626             if (iCurrentPosition < iNumDrivers && iTargetPosition != iCurrentPosition) {
 627                 padid = driverList[iTargetPosition];
 628                 driverList[iTargetPosition] = driverList[iCurrentPosition];
 629                 driverList[iCurrentPosition] = padid;
 630
 631                 /* Locate enabled status */
 632                 if (szBuffer[0] == '1') {
 633                     driverList[iTargetPosition]->fdwSupport &= ~ACMDRIVERDETAILS_SUPPORTF_DISABLED;
 634                 } else if (szBuffer[0] == '0') {
 635                     driverList[iTargetPosition]->fdwSupport |= ACMDRIVERDETAILS_SUPPORTF_DISABLED;
 636                 }
 637             }
 638         }
 639
 640         /* Re-assign pointers so that linked list traverses the ordered array */
 641         for (i = 0; i < iNumDrivers; i++) {
 642             driverList[i]->pPrevACMDriverID = (i > 0) ? driverList[i - 1] : NULL;
 643             driverList[i]->pNextACMDriverID = (i < iNumDrivers - 1) ? driverList[i + 1] : NULL;
 644         }
 645         MSACM_pFirstACMDriverID = driverList[0];
 646         MSACM_pLastACMDriverID = driverList[iNumDrivers - 1];
 647     }
 648
 649 errCleanUp:
 650     if (hPriorityKey != NULL) RegCloseKey(hPriorityKey);
 651     HeapFree(MSACM_hHeap, 0, driverList);
 652 }
 653
 654 /***********************************************************************
 655  *           MSACM_WriteCurrentPriorities()
 656  * Writes out current order of driver priorities to registry key:
 657  * HKCU\\Software\\Microsoft\\Multimedia\\Audio Compression Manager\\Priority v4.00
 658  */
 659 void MSACM_WriteCurrentPriorities(void)
 660 {
 661     LONG lError;
 662     HKEY hPriorityKey;
 663     static const WCHAR basePriorityKey[] = {
 664         'S','o','f','t','w','a','r','e','\\',
 665         'M','i','c','r','o','s','o','f','t','\\',
 666         'M','u','l','t','i','m','e','d','i','a','\\',
 667         'A','u','d','i','o',' ','C','o','m','p','r','e','s','s','i','o','n',' ','M','a','n','a','g','e','r','\\',
 668         'P','r','i','o','r','i','t','y',' ','v','4','.','0','0','\0'
 669     };
 670     PWINE_ACMDRIVERID padid;
 671     DWORD dwPriorityCounter;
 672     static const WCHAR priorityTmpl[] = {'P','r','i','o','r','i','t','y','%','l','d','\0'};
 673     static const WCHAR valueTmpl[] = {'%','c',',',' ','%','s','\0'};
 674     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'};
 675     WCHAR szSubKey[17];
 676     WCHAR szBuffer[256];
 677
 678     /* Delete ACM priority key and create it anew */
 679     lError = RegDeleteKeyW(HKEY_CURRENT_USER, basePriorityKey);
 680     if (lError != ERROR_SUCCESS && lError != ERROR_FILE_NOT_FOUND) {
 681         ERR("unable to remove current key %s (0x%08x) - priority changes won't persist past application end.\n",
 682             debugstr_w(basePriorityKey), lError);
 683         return;
 684     }
 685     lError = RegCreateKeyW(HKEY_CURRENT_USER, basePriorityKey, &hPriorityKey);
 686     if (lError != ERROR_SUCCESS) {
 687         ERR("unable to create key %s (0x%08x) - priority changes won't persist past application end.\n",
 688             debugstr_w(basePriorityKey), lError);
 689         return;
 690     }
 691
 692     /* Write current list of priorities */
 693     for (dwPriorityCounter = 0, padid = MSACM_pFirstACMDriverID; padid; padid = padid->pNextACMDriverID) {
 694         if (padid->fdwSupport & ACMDRIVERDETAILS_SUPPORTF_LOCAL) continue;
 695         if (padid->pszDriverAlias == NULL) continue;    /* internal PCM converter is last */
 696
 697         /* Build required value name */
 698         dwPriorityCounter++;
 699         snprintfW(szSubKey, 17, priorityTmpl, dwPriorityCounter);
 700
 701         /* Value has a 1 in front for enabled drivers and 0 for disabled drivers */
 702         snprintfW(szBuffer, 256, valueTmpl, (padid->fdwSupport & ACMDRIVERDETAILS_SUPPORTF_DISABLED) ? '0' : '1', padid->pszDriverAlias);
 703         strlwrW(szBuffer);
 704
 705         lError = RegSetValueExW(hPriorityKey, szSubKey, 0, REG_SZ, (BYTE *)szBuffer, (strlenW(szBuffer) + 1) * sizeof(WCHAR));
 706         if (lError != ERROR_SUCCESS) {
 707             ERR("unable to write value for %s under key %s (0x%08x)\n",
 708                 debugstr_w(padid->pszDriverAlias), debugstr_w(basePriorityKey), lError);
 709         }
 710     }
 711
 712     /* Build required value name */
 713     dwPriorityCounter++;
 714     snprintfW(szSubKey, 17, priorityTmpl, dwPriorityCounter);
 715
 716     /* Value has a 1 in front for enabled drivers and 0 for disabled drivers */
 717     snprintfW(szBuffer, 256, valueTmpl, '1', converterAlias);
 718
 719     lError = RegSetValueExW(hPriorityKey, szSubKey, 0, REG_SZ, (BYTE *)szBuffer, (strlenW(szBuffer) + 1) * sizeof(WCHAR));
 720     if (lError != ERROR_SUCCESS) {
 721         ERR("unable to write value for %s under key %s (0x%08x)\n",
 722             debugstr_w(converterAlias), debugstr_w(basePriorityKey), lError);
 723     }
 724     RegCloseKey(hPriorityKey);
 725 }
 726
 727 static PWINE_ACMLOCALDRIVER MSACM_pFirstACMLocalDriver;
 728 static PWINE_ACMLOCALDRIVER MSACM_pLastACMLocalDriver;
 729
 730 static PWINE_ACMLOCALDRIVER MSACM_UnregisterLocalDriver(PWINE_ACMLOCALDRIVER paldrv)
 731 {
 732     PWINE_ACMLOCALDRIVER pNextACMLocalDriver;
 733
 734     if (paldrv->pACMInstList) {
 735         ERR("local driver instances still present after closing all drivers - memory leak\n");
 736         return NULL;
 737     }
 738
 739     if (paldrv == MSACM_pFirstACMLocalDriver)
 740         MSACM_pFirstACMLocalDriver = paldrv->pNextACMLocalDrv;
 741     if (paldrv == MSACM_pLastACMLocalDriver)
 742         MSACM_pLastACMLocalDriver = paldrv->pPrevACMLocalDrv;
 743
 744     if (paldrv->pPrevACMLocalDrv)
 745         paldrv->pPrevACMLocalDrv->pNextACMLocalDrv = paldrv->pNextACMLocalDrv;
 746     if (paldrv->pNextACMLocalDrv)
 747         paldrv->pNextACMLocalDrv->pPrevACMLocalDrv = paldrv->pPrevACMLocalDrv;
 748
 749     pNextACMLocalDriver = paldrv->pNextACMLocalDrv;
 750
 751     HeapFree(MSACM_hHeap, 0, paldrv);
 752
 753     return pNextACMLocalDriver;
 754 }
 755
 756 /***********************************************************************
 757  *           MSACM_UnregisterDriver()
 758  */
 759 PWINE_ACMDRIVERID MSACM_UnregisterDriver(PWINE_ACMDRIVERID p)
 760 {
 761     PWINE_ACMDRIVERID pNextACMDriverID;
 762
 763     while (p->pACMDriverList)
 764         acmDriverClose((HACMDRIVER) p->pACMDriverList, 0);
 765
 766     HeapFree(MSACM_hHeap, 0, p->pszDriverAlias);
 767     HeapFree(MSACM_hHeap, 0, p->pszFileName);
 768     HeapFree(MSACM_hHeap, 0, p->aFormatTag);
 769
 770     if (p == MSACM_pFirstACMDriverID)
 771         MSACM_pFirstACMDriverID = p->pNextACMDriverID;
 772     if (p == MSACM_pLastACMDriverID)
 773         MSACM_pLastACMDriverID = p->pPrevACMDriverID;
 774
 775     if (p->pPrevACMDriverID)
 776         p->pPrevACMDriverID->pNextACMDriverID = p->pNextACMDriverID;
 777     if (p->pNextACMDriverID)
 778         p->pNextACMDriverID->pPrevACMDriverID = p->pPrevACMDriverID;
 779
 780     pNextACMDriverID = p->pNextACMDriverID;
 781
 782     if (p->pLocalDriver) MSACM_UnregisterLocalDriver(p->pLocalDriver);
 783     HeapFree(MSACM_hHeap, 0, p);
 784
 785     return pNextACMDriverID;
 786 }
 787
 788 /***********************************************************************
 789  *           MSACM_UnregisterAllDrivers()
 790  */
 791 void MSACM_UnregisterAllDrivers(void)
 792 {
 793     PWINE_ACMNOTIFYWND panwnd = MSACM_pFirstACMNotifyWnd;
 794     PWINE_ACMDRIVERID p = MSACM_pFirstACMDriverID;
 795
 796     while (p) {
 797         MSACM_WriteCache(p);
 798         p = MSACM_UnregisterDriver(p);
 799     }
 800
 801     while (panwnd) {
 802         panwnd = MSACM_UnRegisterNotificationWindow(panwnd);
 803     }
 804 }
 805
 806 /***********************************************************************
 807  *           MSACM_GetObj()
 808  */
 809 PWINE_ACMOBJ MSACM_GetObj(HACMOBJ hObj, DWORD type)
 810 {
 811     PWINE_ACMOBJ        pao = (PWINE_ACMOBJ)hObj;
 812
 813     if (pao == NULL || IsBadReadPtr(pao, sizeof(WINE_ACMOBJ)) ||
 814         ((type != WINE_ACMOBJ_DONTCARE) && (type != pao->dwType)))
 815         return NULL;
 816     return pao;
 817 }
 818
 819 /***********************************************************************
 820  *           MSACM_GetDriverID()
 821  */
 822 PWINE_ACMDRIVERID MSACM_GetDriverID(HACMDRIVERID hDriverID)
 823 {
 824     return (PWINE_ACMDRIVERID)MSACM_GetObj((HACMOBJ)hDriverID, WINE_ACMOBJ_DRIVERID);
 825 }
 826
 827 /***********************************************************************
 828  *           MSACM_GetDriver()
 829  */
 830 PWINE_ACMDRIVER MSACM_GetDriver(HACMDRIVER hDriver)
 831 {
 832     return (PWINE_ACMDRIVER)MSACM_GetObj((HACMOBJ)hDriver, WINE_ACMOBJ_DRIVER);
 833 }
 834
 835 /***********************************************************************
 836  *           MSACM_GetNotifyWnd()
 837  */
 838 PWINE_ACMNOTIFYWND MSACM_GetNotifyWnd(HACMDRIVERID hDriver)
 839 {
 840     return (PWINE_ACMNOTIFYWND)MSACM_GetObj((HACMOBJ)hDriver, WINE_ACMOBJ_NOTIFYWND);
 841 }
 842
 843 /***********************************************************************
 844  *           MSACM_GetLocalDriver()
 845  */
 846 /*
 847 PWINE_ACMLOCALDRIVER MSACM_GetLocalDriver(HACMDRIVER hDriver)
 848 {
 849     return (PWINE_ACMLOCALDRIVER)MSACM_GetObj((HACMOBJ)hDriver, WINE_ACMOBJ_LOCALDRIVER);
 850 }
 851 */
 852 #define MSACM_DRIVER_SendMessage(PDRVRINST, msg, lParam1, lParam2) \
 853         (PDRVRINST)->pLocalDriver->lpDrvProc((PDRVRINST)->dwDriverID, (HDRVR)(PDRVRINST), msg, lParam1, lParam2)
 854
 855 /***********************************************************************
 856  *           MSACM_Message()
 857  */
 858 MMRESULT MSACM_Message(HACMDRIVER had, UINT uMsg, LPARAM lParam1, LPARAM lParam2)
 859 {
 860     PWINE_ACMDRIVER     pad = MSACM_GetDriver(had);
 861
 862     if (!pad) return MMSYSERR_INVALHANDLE;
 863     if (pad->hDrvr) return SendDriverMessage(pad->hDrvr, uMsg, lParam1, lParam2);
 864     if (pad->pLocalDrvrInst) return MSACM_DRIVER_SendMessage(pad->pLocalDrvrInst, uMsg, lParam1, lParam2);
 865
 866     return MMSYSERR_INVALHANDLE;
 867 }
 868
 869 PWINE_ACMLOCALDRIVER MSACM_RegisterLocalDriver(HMODULE hModule, DRIVERPROC lpDriverProc)
 870 {
 871     PWINE_ACMLOCALDRIVER paldrv;
 872
 873     TRACE("(%p, %p)\n", hModule, lpDriverProc);
 874     if (!hModule || !lpDriverProc) return NULL;
 875
 876     /* look up previous instance of local driver module */
 877     for (paldrv = MSACM_pFirstACMLocalDriver; paldrv; paldrv = paldrv->pNextACMLocalDrv)
 878     {
 879         if (paldrv->hModule == hModule && paldrv->lpDrvProc == lpDriverProc) return paldrv;
 880     }
 881
 882     paldrv = HeapAlloc(MSACM_hHeap, 0, sizeof(WINE_ACMLOCALDRIVER));
 883     paldrv->obj.dwType = WINE_ACMOBJ_LOCALDRIVER;
 884     paldrv->obj.pACMDriverID = 0;
 885     paldrv->hModule = hModule;
 886     paldrv->lpDrvProc = lpDriverProc;
 887     paldrv->pACMInstList = NULL;
 888
 889     paldrv->pNextACMLocalDrv = NULL;
 890     paldrv->pPrevACMLocalDrv = MSACM_pLastACMLocalDriver;
 891     if (MSACM_pLastACMLocalDriver)
 892         MSACM_pLastACMLocalDriver->pNextACMLocalDrv = paldrv;
 893     MSACM_pLastACMLocalDriver = paldrv;
 894     if (!MSACM_pFirstACMLocalDriver)
 895         MSACM_pFirstACMLocalDriver = paldrv;
 896
 897     return paldrv;
 898 }
 899
 900 /**************************************************************************
 901  *                      MSACM_GetNumberOfModuleRefs             [internal]
 902  *
 903  * Returns the number of open drivers which share the same module.
 904  * Inspired from implementation in dlls/winmm/driver.c
 905  */
 906 static unsigned MSACM_GetNumberOfModuleRefs(HMODULE hModule, DRIVERPROC lpDrvProc, WINE_ACMLOCALDRIVERINST ** found)
 907 {
 908     PWINE_ACMLOCALDRIVER lpDrv;
 909     unsigned            count = 0;
 910
 911     if (found) *found = NULL;
 912     for (lpDrv = MSACM_pFirstACMLocalDriver; lpDrv; lpDrv = lpDrv->pNextACMLocalDrv)
 913     {
 914         if (lpDrv->hModule == hModule && lpDrv->lpDrvProc == lpDrvProc)
 915         {
 916             PWINE_ACMLOCALDRIVERINST pInst = lpDrv->pACMInstList;
 917
 918             while (pInst) {
 919                 if (found && !*found) *found = pInst;
 920                 count++;
 921                 pInst = pInst->pNextACMInst;
 922             }
 923         }
 924     }
 925     return count;
 926 }
 927
 928 /**************************************************************************
 929  *                              MSACM_RemoveFromList            [internal]
 930  *
 931  * Generates all the logic to handle driver closure / deletion
 932  * Removes a driver struct to the list of open drivers.
 933  */
 934 static  BOOL    MSACM_RemoveFromList(PWINE_ACMLOCALDRIVERINST lpDrv)
 935 {
 936     PWINE_ACMLOCALDRIVER pDriverBase = lpDrv->pLocalDriver;
 937     PWINE_ACMLOCALDRIVERINST pPrevInst;
 938
 939     /* last of this driver in list ? */
 940     if (MSACM_GetNumberOfModuleRefs(pDriverBase->hModule, pDriverBase->lpDrvProc, NULL) == 1) {
 941         MSACM_DRIVER_SendMessage(lpDrv, DRV_DISABLE, 0L, 0L);
 942         MSACM_DRIVER_SendMessage(lpDrv, DRV_FREE,    0L, 0L);
 943     }
 944
 945     pPrevInst = NULL;
 946     if (pDriverBase->pACMInstList != lpDrv) {
 947         pPrevInst = pDriverBase->pACMInstList;
 948         while (pPrevInst && pPrevInst->pNextACMInst != lpDrv)
 949             pPrevInst = pPrevInst->pNextACMInst;
 950         if (!pPrevInst) {
 951             ERR("requested to remove invalid instance %p\n", pPrevInst);
 952             return FALSE;
 953         }
 954     }
 955     if (!pPrevInst) {
 956         /* first driver instance on list */
 957         pDriverBase->pACMInstList = lpDrv->pNextACMInst;
 958     } else {
 959         pPrevInst->pNextACMInst = lpDrv->pNextACMInst;
 960     }
 961     return TRUE;
 962 }
 963
 964 /**************************************************************************
 965  *                              MSACM_AddToList         [internal]
 966  *
 967  * Adds a driver struct to the list of open drivers.
 968  * Generates all the logic to handle driver creation / open.
 969  */
 970 static  BOOL    MSACM_AddToList(PWINE_ACMLOCALDRIVERINST lpNewDrv, LPARAM lParam2)
 971 {
 972     PWINE_ACMLOCALDRIVER pDriverBase = lpNewDrv->pLocalDriver;
 973
 974     /* first of this driver in list ? */
 975     if (MSACM_GetNumberOfModuleRefs(pDriverBase->hModule, pDriverBase->lpDrvProc, NULL) == 0) {
 976         if (MSACM_DRIVER_SendMessage(lpNewDrv, DRV_LOAD, 0L, 0L) != DRV_SUCCESS) {
 977             FIXME("DRV_LOAD failed on driver %p\n", lpNewDrv);
 978             return FALSE;
 979         }
 980         /* returned value is not checked */
 981         MSACM_DRIVER_SendMessage(lpNewDrv, DRV_ENABLE, 0L, 0L);
 982     }
 983
 984     lpNewDrv->pNextACMInst = NULL;
 985     if (pDriverBase->pACMInstList == NULL) {
 986         pDriverBase->pACMInstList = lpNewDrv;
 987     } else {
 988         PWINE_ACMLOCALDRIVERINST lpDrvInst = pDriverBase->pACMInstList;
 989
 990         while (lpDrvInst->pNextACMInst != NULL)
 991             lpDrvInst = lpDrvInst->pNextACMInst;
 992
 993         lpDrvInst->pNextACMInst = lpNewDrv;
 994     }
 995
 996     /* Now just open a new instance of a driver on this module */
 997     lpNewDrv->dwDriverID = MSACM_DRIVER_SendMessage(lpNewDrv, DRV_OPEN, 0, lParam2);
 998
 999     if (lpNewDrv->dwDriverID == 0) {
1000         FIXME("DRV_OPEN failed on driver %p\n", lpNewDrv);
1001         MSACM_RemoveFromList(lpNewDrv);
1002         return FALSE;
1003     }
1004     return TRUE;
1005 }
1006
1007 PWINE_ACMLOCALDRIVERINST MSACM_OpenLocalDriver(PWINE_ACMLOCALDRIVER paldrv, LPARAM lParam2)
1008 {
1009     PWINE_ACMLOCALDRIVERINST pDrvInst;
1010
1011     pDrvInst = HeapAlloc(MSACM_hHeap, 0, sizeof(WINE_ACMLOCALDRIVERINST));
1012     if (!pDrvInst)
1013         return NULL;
1014
1015     pDrvInst->pLocalDriver = paldrv;
1016     pDrvInst->dwDriverID = 0;
1017     pDrvInst->pNextACMInst = NULL;
1018     pDrvInst->bSession = FALSE;
1019
1020     /* Win32 installable drivers must support a two phase opening scheme:
1021      * + first open with NULL as lParam2 (session instance),
1022      * + then do a second open with the real non null lParam2)
1023      */
1024     if (MSACM_GetNumberOfModuleRefs(paldrv->hModule, paldrv->lpDrvProc, NULL) == 0 && lParam2)
1025     {
1026         PWINE_ACMLOCALDRIVERINST   ret;
1027
1028         if (!MSACM_AddToList(pDrvInst, 0L))
1029         {
1030             ERR("load0 failed\n");
1031             goto exit;
1032         }
1033         ret = MSACM_OpenLocalDriver(paldrv, lParam2);
1034         if (!ret)
1035         {
1036             ERR("load1 failed\n");
1037             /* If MSACM_CloseLocalDriver returns TRUE,
1038              * then pDrvInst has been freed
1039              */
1040             if (!MSACM_CloseLocalDriver(pDrvInst))
1041                 goto exit;
1042
1043             return NULL;
1044         }
1045         pDrvInst->bSession = TRUE;
1046         return ret;
1047     }
1048
1049     if (!MSACM_AddToList(pDrvInst, lParam2))
1050     {
1051         ERR("load failed\n");
1052         goto exit;
1053     }
1054
1055     TRACE("=> %p\n", pDrvInst);
1056     return pDrvInst;
1057 exit:
1058     HeapFree(MSACM_hHeap, 0, pDrvInst);
1059     return NULL;
1060 }
1061
1062 LRESULT MSACM_CloseLocalDriver(PWINE_ACMLOCALDRIVERINST paldrv)
1063 {
1064     if (MSACM_RemoveFromList(paldrv)) {
1065         PWINE_ACMLOCALDRIVERINST lpDrv0;
1066         PWINE_ACMLOCALDRIVER pDriverBase = paldrv->pLocalDriver;
1067
1068         MSACM_DRIVER_SendMessage(paldrv, DRV_CLOSE, 0, 0);
1069         paldrv->dwDriverID = 0;
1070
1071         if (paldrv->bSession)
1072             ERR("should not directly close session instance (%p)\n", paldrv);
1073
1074         /* if driver has an opened session instance, we have to close it too */
1075         if (MSACM_GetNumberOfModuleRefs(pDriverBase->hModule, pDriverBase->lpDrvProc, &lpDrv0) == 1 &&
1076                 lpDrv0->bSession)
1077         {
1078             MSACM_DRIVER_SendMessage(lpDrv0, DRV_CLOSE, 0L, 0L);
1079             lpDrv0->dwDriverID = 0;
1080             MSACM_RemoveFromList(lpDrv0);
1081             HeapFree(GetProcessHeap(), 0, lpDrv0);
1082         }
1083
1084         HeapFree(MSACM_hHeap, 0, paldrv);
1085         return TRUE;
1086     }
1087     ERR("unable to close driver instance\n");
1088     return FALSE;
1089 }