dlls/quartz/main.c

   1 /*
   2  * Exported APIs.
   3  *
   4  * Copyright (C) Hidenori TAKESHIMA <hidenori@a2.ctktv.ne.jp>
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include "config.h"
  22
  23 #include "windef.h"
  24 #include "winerror.h"
  25 #include "winbase.h"
  26 #include "wingdi.h"
  27 #include "winuser.h"
  28 #include "winnls.h"
  29 #include "mmsystem.h"
  30 #include "ole2.h"
  31 #include "strmif.h"
  32 #include "control.h"
  33 #include "uuids.h"
  34 #include "errors.h"
  35
  36 #include "wine/debug.h"
  37 WINE_DEFAULT_DEBUG_CHANNEL(quartz);
  38
  39 #include "initguid.h"
  40
  41 #include "quartz_private.h"
  42 #include "fgraph.h"
  43 #include "sysclock.h"
  44 #include "memalloc.h"
  45 #include "devenum.h"
  46 #include "fmap.h"
  47 #include "seekpass.h"
  48 #include "audren.h"
  49 #include "vidren.h"
  50 #include "parser.h"
  51 #include "asyncsrc.h"
  52 #include "xform.h"
  53
  54
  55 typedef struct QUARTZ_CLASSENTRY
  56 {
  57         const CLSID*    pclsid;
  58         QUARTZ_pCreateIUnknown  pCreateIUnk;
  59 } QUARTZ_CLASSENTRY;
  60
  61
  62 static HRESULT WINAPI
  63 IClassFactory_fnQueryInterface(LPCLASSFACTORY iface,REFIID riid,LPVOID *ppobj);
  64 static ULONG WINAPI IClassFactory_fnAddRef(LPCLASSFACTORY iface);
  65 static ULONG WINAPI IClassFactory_fnRelease(LPCLASSFACTORY iface);
  66 static HRESULT WINAPI IClassFactory_fnCreateInstance(LPCLASSFACTORY iface,LPUNKNOWN pOuter,REFIID riid,LPVOID *ppobj);
  67 static HRESULT WINAPI IClassFactory_fnLockServer(LPCLASSFACTORY iface,BOOL dolock);
  68
  69 static ICOM_VTABLE(IClassFactory) iclassfact =
  70 {
  71         ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
  72         IClassFactory_fnQueryInterface,
  73         IClassFactory_fnAddRef,
  74         IClassFactory_fnRelease,
  75         IClassFactory_fnCreateInstance,
  76         IClassFactory_fnLockServer
  77 };
  78
  79 typedef struct
  80 {
  81         /* IUnknown fields */
  82         ICOM_VFIELD(IClassFactory);
  83         LONG    ref;
  84         /* IClassFactory fields */
  85         const QUARTZ_CLASSENTRY* pEntry;
  86 } IClassFactoryImpl;
  87
  88 static const QUARTZ_CLASSENTRY QUARTZ_ClassList[] =
  89 {
  90         { &CLSID_FilterGraph, &QUARTZ_CreateFilterGraph },
  91         { &CLSID_SystemClock, &QUARTZ_CreateSystemClock },
  92         { &CLSID_MemoryAllocator, &QUARTZ_CreateMemoryAllocator },
  93         { &CLSID_SystemDeviceEnum, &QUARTZ_CreateSystemDeviceEnum },
  94         { &CLSID_FilterMapper, &QUARTZ_CreateFilterMapper },
  95         { &CLSID_FilterMapper2, &QUARTZ_CreateFilterMapper2 },
  96         { &CLSID_SeekingPassThru, &QUARTZ_CreateSeekingPassThru },
  97         { &CLSID_AudioRender, &QUARTZ_CreateAudioRenderer },
  98         { &CLSID_VideoRenderer, &QUARTZ_CreateVideoRenderer },
  99         { &CLSID_quartzWaveParser, &QUARTZ_CreateWaveParser },
 100         { &CLSID_AviSplitter, &QUARTZ_CreateAVISplitter },
 101         { &CLSID_AsyncReader, &QUARTZ_CreateAsyncReader },
 102         { &CLSID_URLReader, &QUARTZ_CreateURLReader },
 103         { &CLSID_AVIDec, &QUARTZ_CreateAVIDec },
 104         { &CLSID_Colour, &QUARTZ_CreateColour },
 105         { NULL, NULL },
 106 };
 107
 108 /* per-process variables */
 109 static CRITICAL_SECTION csHeap;
 110 static DWORD dwClassObjRef;
 111 static HANDLE hDLLHeap;
 112
 113 void* QUARTZ_AllocObj( DWORD dwSize )
 114 {
 115         void*   pv;
 116
 117         EnterCriticalSection( &csHeap );
 118         dwClassObjRef ++;
 119         pv = HeapAlloc( hDLLHeap, 0, dwSize );
 120         if ( pv == NULL )
 121                 dwClassObjRef --;
 122         LeaveCriticalSection( &csHeap );
 123
 124         return pv;
 125 }
 126
 127 void QUARTZ_FreeObj( void* pobj )
 128 {
 129         EnterCriticalSection( &csHeap );
 130         HeapFree( hDLLHeap, 0, pobj );
 131         dwClassObjRef --;
 132         LeaveCriticalSection( &csHeap );
 133 }
 134
 135 void* QUARTZ_AllocMem( DWORD dwSize )
 136 {
 137         return HeapAlloc( hDLLHeap, 0, dwSize );
 138 }
 139
 140 void QUARTZ_FreeMem( void* pMem )
 141 {
 142         HeapFree( hDLLHeap, 0, pMem );
 143 }
 144
 145 void* QUARTZ_ReallocMem( void* pMem, DWORD dwSize )
 146 {
 147         if ( pMem == NULL )
 148                 return QUARTZ_AllocMem( dwSize );
 149
 150         return HeapReAlloc( hDLLHeap, 0, pMem, dwSize );
 151 }
 152
 153 static
 154 LPWSTR QUARTZ_strncpyAtoW( LPWSTR lpwstr, LPCSTR lpstr, INT wbuflen )
 155 {
 156         INT     len;
 157
 158         len = MultiByteToWideChar( CP_ACP, 0, lpstr, -1, lpwstr, wbuflen );
 159         if ( len == 0 )
 160                 *lpwstr = 0;
 161         return lpwstr;
 162 }
 163
 164
 165 /************************************************************************/
 166
 167 static HRESULT WINAPI
 168 IClassFactory_fnQueryInterface(LPCLASSFACTORY iface,REFIID riid,LPVOID *ppobj)
 169 {
 170         ICOM_THIS(IClassFactoryImpl,iface);
 171
 172         TRACE("(%p)->(%p,%p)\n",This,riid,ppobj);
 173         if ( ( IsEqualGUID( &IID_IUnknown, riid ) ) ||
 174              ( IsEqualGUID( &IID_IClassFactory, riid ) ) )
 175         {
 176                 *ppobj = iface;
 177                 IClassFactory_AddRef(iface);
 178                 return S_OK;
 179         }
 180
 181         return E_NOINTERFACE;
 182 }
 183
 184 static ULONG WINAPI IClassFactory_fnAddRef(LPCLASSFACTORY iface)
 185 {
 186         ICOM_THIS(IClassFactoryImpl,iface);
 187
 188         TRACE("(%p)->()\n",This);
 189
 190         return InterlockedExchangeAdd(&(This->ref),1) + 1;
 191 }
 192
 193 static ULONG WINAPI IClassFactory_fnRelease(LPCLASSFACTORY iface)
 194 {
 195         ICOM_THIS(IClassFactoryImpl,iface);
 196         LONG    ref;
 197
 198         TRACE("(%p)->()\n",This);
 199         ref = InterlockedExchangeAdd(&(This->ref),-1) - 1;
 200         if ( ref > 0 )
 201                 return (ULONG)ref;
 202
 203         QUARTZ_FreeObj(This);
 204         return 0;
 205 }
 206
 207 static HRESULT WINAPI IClassFactory_fnCreateInstance(LPCLASSFACTORY iface,LPUNKNOWN pOuter,REFIID riid,LPVOID *ppobj)
 208 {
 209         ICOM_THIS(IClassFactoryImpl,iface);
 210         HRESULT hr;
 211         IUnknown*       punk;
 212
 213         TRACE("(%p)->(%p,%s,%p)\n",This,pOuter,debugstr_guid(riid),ppobj);
 214
 215         if ( ppobj == NULL )
 216                 return E_POINTER;
 217         if ( pOuter != NULL && !IsEqualGUID( riid, &IID_IUnknown ) )
 218                 return CLASS_E_NOAGGREGATION;
 219
 220         *ppobj = NULL;
 221
 222         hr = (*This->pEntry->pCreateIUnk)(pOuter,(void**)&punk);
 223         if ( hr != S_OK )
 224                 return hr;
 225
 226         hr = IUnknown_QueryInterface(punk,riid,ppobj);
 227         IUnknown_Release(punk);
 228
 229         return hr;
 230 }
 231
 232 static HRESULT WINAPI IClassFactory_fnLockServer(LPCLASSFACTORY iface,BOOL dolock)
 233 {
 234         ICOM_THIS(IClassFactoryImpl,iface);
 235         HRESULT hr;
 236
 237         TRACE("(%p)->(%d)\n",This,dolock);
 238         if (dolock)
 239                 hr = IClassFactory_AddRef(iface);
 240         else
 241                 hr = IClassFactory_Release(iface);
 242
 243         return hr;
 244 }
 245
 246
 247
 248 static HRESULT IClassFactory_Alloc( const CLSID* pclsid, void** ppobj )
 249 {
 250         const QUARTZ_CLASSENTRY*        pEntry;
 251         IClassFactoryImpl*      pImpl;
 252
 253         TRACE( "(%s,%p)\n", debugstr_guid(pclsid), ppobj );
 254
 255         pEntry = QUARTZ_ClassList;
 256         while ( pEntry->pclsid != NULL )
 257         {
 258                 if ( IsEqualGUID( pclsid, pEntry->pclsid ) )
 259                         goto found;
 260                 pEntry ++;
 261         }
 262
 263         return CLASS_E_CLASSNOTAVAILABLE;
 264 found:
 265         pImpl = (IClassFactoryImpl*)QUARTZ_AllocObj( sizeof(IClassFactoryImpl) );
 266         if ( pImpl == NULL )
 267                 return E_OUTOFMEMORY;
 268
 269         TRACE( "allocated successfully.\n" );
 270
 271         ICOM_VTBL(pImpl) = &iclassfact;
 272         pImpl->ref = 1;
 273         pImpl->pEntry = pEntry;
 274
 275         *ppobj = (void*)pImpl;
 276         return S_OK;
 277 }
 278
 279
 280 /***********************************************************************
 281  *              QUARTZ_InitProcess (internal)
 282  */
 283 static BOOL QUARTZ_InitProcess( void )
 284 {
 285         TRACE("()\n");
 286
 287         dwClassObjRef = 0;
 288         hDLLHeap = (HANDLE)NULL;
 289         InitializeCriticalSection( &csHeap );
 290
 291         hDLLHeap = HeapCreate( 0, 0x10000, 0 );
 292         if ( hDLLHeap == (HANDLE)NULL )
 293                 return FALSE;
 294
 295         return TRUE;
 296 }
 297
 298 /***********************************************************************
 299  *              QUARTZ_UninitProcess (internal)
 300  */
 301 static void QUARTZ_UninitProcess( void )
 302 {
 303         TRACE("()\n");
 304
 305         if ( dwClassObjRef != 0 )
 306                 ERR( "you must release some objects allocated from quartz.\n" );
 307         if ( hDLLHeap != (HANDLE)NULL )
 308         {
 309                 HeapDestroy( hDLLHeap );
 310                 hDLLHeap = (HANDLE)NULL;
 311         }
 312         DeleteCriticalSection( &csHeap );
 313 }
 314
 315 /***********************************************************************
 316  *              QUARTZ_DllMain
 317  */
 318 BOOL WINAPI QUARTZ_DllMain(
 319         HINSTANCE hInstDLL,
 320         DWORD fdwReason,
 321         LPVOID lpvReserved )
 322 {
 323         TRACE("(%08x,%08lx,%p)\n",hInstDLL,fdwReason,lpvReserved);
 324
 325         switch ( fdwReason )
 326         {
 327         case DLL_PROCESS_ATTACH:
 328                 if ( !QUARTZ_InitProcess() )
 329                         return FALSE;
 330                 break;
 331         case DLL_PROCESS_DETACH:
 332                 QUARTZ_UninitProcess();
 333                 break;
 334         case DLL_THREAD_ATTACH:
 335                 break;
 336         case DLL_THREAD_DETACH:
 337                 break;
 338         }
 339
 340         return TRUE;
 341 }
 342
 343
 344 /***********************************************************************
 345  *              DllCanUnloadNow (QUARTZ.@)
 346  *
 347  * RETURNS
 348  *    Success: S_OK
 349  *    Failure: S_FALSE
 350  */
 351 HRESULT WINAPI QUARTZ_DllCanUnloadNow(void)
 352 {
 353         HRESULT hr;
 354
 355         EnterCriticalSection( &csHeap );
 356         hr = ( dwClassObjRef == 0 ) ? S_OK : S_FALSE;
 357         LeaveCriticalSection( &csHeap );
 358
 359         return hr;
 360 }
 361
 362 /***********************************************************************
 363  *              DllGetClassObject (QUARTZ.@)
 364  */
 365 HRESULT WINAPI QUARTZ_DllGetClassObject(
 366                 const CLSID* pclsid,const IID* piid,void** ppv)
 367 {
 368         *ppv = NULL;
 369         if ( IsEqualCLSID( &IID_IUnknown, piid ) ||
 370              IsEqualCLSID( &IID_IClassFactory, piid ) )
 371         {
 372                 return IClassFactory_Alloc( pclsid, ppv );
 373         }
 374
 375         return CLASS_E_CLASSNOTAVAILABLE;
 376 }
 377
 378 /***********************************************************************
 379  *              DllRegisterServer (QUARTZ.@)
 380  */
 381
 382 HRESULT WINAPI QUARTZ_DllRegisterServer( void )
 383 {
 384         FIXME( "(): stub\n" );
 385         return E_FAIL;
 386 }
 387
 388 /***********************************************************************
 389  *              DllUnregisterServer (QUARTZ.@)
 390  */
 391
 392 HRESULT WINAPI QUARTZ_DllUnregisterServer( void )
 393 {
 394         FIXME( "(): stub\n" );
 395         return E_FAIL;
 396 }
 397
 398 /**************************************************************************/
 399 /**************************************************************************/
 400
 401 /* FIXME - all string should be defined in the resource of quartz. */
 402
 403 static LPCSTR hresult_to_string( HRESULT hr )
 404 {
 405         switch ( hr )
 406         {
 407         #define ENTRY(x)        case x: return (const char*)#x
 408         /* some known codes */
 409         ENTRY(S_OK);
 410         ENTRY(S_FALSE);
 411         ENTRY(E_FAIL);
 412         ENTRY(E_POINTER);
 413         ENTRY(E_NOTIMPL);
 414         ENTRY(E_NOINTERFACE);
 415         ENTRY(E_OUTOFMEMORY);
 416         ENTRY(CLASS_E_CLASSNOTAVAILABLE);
 417         ENTRY(CLASS_E_NOAGGREGATION);
 418
 419         /* vfwmsgs.h */
 420         ENTRY(VFW_S_NO_MORE_ITEMS);
 421         ENTRY(VFW_E_BAD_KEY);
 422         ENTRY(VFW_E_INVALIDMEDIATYPE);
 423         ENTRY(VFW_E_INVALIDSUBTYPE);
 424         ENTRY(VFW_E_NEED_OWNER);
 425         ENTRY(VFW_E_ENUM_OUT_OF_SYNC);
 426         ENTRY(VFW_E_ALREADY_CONNECTED);
 427         ENTRY(VFW_E_FILTER_ACTIVE);
 428         ENTRY(VFW_E_NO_TYPES);
 429         ENTRY(VFW_E_NO_ACCEPTABLE_TYPES);
 430         ENTRY(VFW_E_INVALID_DIRECTION);
 431         ENTRY(VFW_E_NOT_CONNECTED);
 432         ENTRY(VFW_E_NO_ALLOCATOR);
 433         ENTRY(VFW_E_RUNTIME_ERROR);
 434         ENTRY(VFW_E_BUFFER_NOTSET);
 435         ENTRY(VFW_E_BUFFER_OVERFLOW);
 436         ENTRY(VFW_E_BADALIGN);
 437         ENTRY(VFW_E_ALREADY_COMMITTED);
 438         ENTRY(VFW_E_BUFFERS_OUTSTANDING);
 439         ENTRY(VFW_E_NOT_COMMITTED);
 440         ENTRY(VFW_E_SIZENOTSET);
 441         ENTRY(VFW_E_NO_CLOCK);
 442         ENTRY(VFW_E_NO_SINK);
 443         ENTRY(VFW_E_NO_INTERFACE);
 444         ENTRY(VFW_E_NOT_FOUND);
 445         ENTRY(VFW_E_CANNOT_CONNECT);
 446         ENTRY(VFW_E_CANNOT_RENDER);
 447         ENTRY(VFW_E_CHANGING_FORMAT);
 448         ENTRY(VFW_E_NO_COLOR_KEY_SET);
 449         ENTRY(VFW_E_NOT_OVERLAY_CONNECTION);
 450         ENTRY(VFW_E_NOT_SAMPLE_CONNECTION);
 451         ENTRY(VFW_E_PALETTE_SET);
 452         ENTRY(VFW_E_COLOR_KEY_SET);
 453         ENTRY(VFW_E_NO_COLOR_KEY_FOUND);
 454         ENTRY(VFW_E_NO_PALETTE_AVAILABLE);
 455         ENTRY(VFW_E_NO_DISPLAY_PALETTE);
 456         ENTRY(VFW_E_TOO_MANY_COLORS);
 457         ENTRY(VFW_E_STATE_CHANGED);
 458         ENTRY(VFW_E_NOT_STOPPED);
 459         ENTRY(VFW_E_NOT_PAUSED);
 460         ENTRY(VFW_E_NOT_RUNNING);
 461         ENTRY(VFW_E_WRONG_STATE);
 462         ENTRY(VFW_E_START_TIME_AFTER_END);
 463         ENTRY(VFW_E_INVALID_RECT);
 464         ENTRY(VFW_E_TYPE_NOT_ACCEPTED);
 465         ENTRY(VFW_E_SAMPLE_REJECTED);
 466         ENTRY(VFW_E_SAMPLE_REJECTED_EOS);
 467         ENTRY(VFW_S_DUPLICATE_NAME);
 468         ENTRY(VFW_E_DUPLICATE_NAME);
 469         ENTRY(VFW_E_TIMEOUT);
 470         ENTRY(VFW_E_INVALID_FILE_FORMAT);
 471         ENTRY(VFW_E_ENUM_OUT_OF_RANGE);
 472         ENTRY(VFW_E_CIRCULAR_GRAPH);
 473         ENTRY(VFW_E_NOT_ALLOWED_TO_SAVE);
 474         ENTRY(VFW_E_TIME_ALREADY_PASSED);
 475         ENTRY(VFW_E_ALREADY_CANCELLED);
 476         ENTRY(VFW_E_CORRUPT_GRAPH_FILE);
 477         ENTRY(VFW_E_ADVISE_ALREADY_SET);
 478         ENTRY(VFW_S_STATE_INTERMEDIATE);
 479         ENTRY(VFW_E_NO_MODEX_AVAILABLE);
 480         ENTRY(VFW_E_NO_ADVISE_SET);
 481         ENTRY(VFW_E_NO_FULLSCREEN);
 482         ENTRY(VFW_E_IN_FULLSCREEN_MODE);
 483         ENTRY(VFW_E_UNKNOWN_FILE_TYPE);
 484         ENTRY(VFW_E_CANNOT_LOAD_SOURCE_FILTER);
 485         ENTRY(VFW_S_PARTIAL_RENDER);
 486         ENTRY(VFW_E_FILE_TOO_SHORT);
 487         ENTRY(VFW_E_INVALID_FILE_VERSION);
 488         ENTRY(VFW_S_SOME_DATA_IGNORED);
 489         ENTRY(VFW_S_CONNECTIONS_DEFERRED);
 490         ENTRY(VFW_E_INVALID_CLSID);
 491         ENTRY(VFW_E_INVALID_MEDIA_TYPE);
 492         ENTRY(VFW_E_SAMPLE_TIME_NOT_SET);
 493         ENTRY(VFW_S_RESOURCE_NOT_NEEDED);
 494         ENTRY(VFW_E_MEDIA_TIME_NOT_SET);
 495         ENTRY(VFW_E_NO_TIME_FORMAT_SET);
 496         ENTRY(VFW_E_MONO_AUDIO_HW);
 497         ENTRY(VFW_S_MEDIA_TYPE_IGNORED);
 498         ENTRY(VFW_E_NO_DECOMPRESSOR);
 499         ENTRY(VFW_E_NO_AUDIO_HARDWARE);
 500         ENTRY(VFW_S_VIDEO_NOT_RENDERED);
 501         ENTRY(VFW_S_AUDIO_NOT_RENDERED);
 502         ENTRY(VFW_E_RPZA);
 503         ENTRY(VFW_S_RPZA);
 504         ENTRY(VFW_E_PROCESSOR_NOT_SUITABLE);
 505         ENTRY(VFW_E_UNSUPPORTED_AUDIO);
 506         ENTRY(VFW_E_UNSUPPORTED_VIDEO);
 507         ENTRY(VFW_E_MPEG_NOT_CONSTRAINED);
 508         ENTRY(VFW_E_NOT_IN_GRAPH);
 509         ENTRY(VFW_S_ESTIMATED);
 510         ENTRY(VFW_E_NO_TIME_FORMAT);
 511         ENTRY(VFW_E_READ_ONLY);
 512         ENTRY(VFW_S_RESERVED);
 513         ENTRY(VFW_E_BUFFER_UNDERFLOW);
 514         ENTRY(VFW_E_UNSUPPORTED_STREAM);
 515         ENTRY(VFW_E_NO_TRANSPORT);
 516         ENTRY(VFW_S_STREAM_OFF);
 517         ENTRY(VFW_S_CANT_CUE);
 518         ENTRY(VFW_E_BAD_VIDEOCD);
 519         ENTRY(VFW_S_NO_STOP_TIME);
 520         ENTRY(VFW_E_OUT_OF_VIDEO_MEMORY);
 521         ENTRY(VFW_E_VP_NEGOTIATION_FAILED);
 522         ENTRY(VFW_E_DDRAW_CAPS_NOT_SUITABLE);
 523         ENTRY(VFW_E_NO_VP_HARDWARE);
 524         ENTRY(VFW_E_NO_CAPTURE_HARDWARE);
 525         ENTRY(VFW_E_DVD_OPERATION_INHIBITED);
 526         ENTRY(VFW_E_DVD_INVALIDDOMAIN);
 527         ENTRY(VFW_E_DVD_NO_BUTTON);
 528         ENTRY(VFW_E_DVD_GRAPHNOTREADY);
 529         ENTRY(VFW_E_DVD_RENDERFAIL);
 530         ENTRY(VFW_E_DVD_DECNOTENOUGH);
 531         ENTRY(VFW_E_DDRAW_VERSION_NOT_SUITABLE);
 532         ENTRY(VFW_E_COPYPROT_FAILED);
 533         ENTRY(VFW_S_NOPREVIEWPIN);
 534         ENTRY(VFW_E_TIME_EXPIRED);
 535         ENTRY(VFW_S_DVD_NON_ONE_SEQUENTIAL);
 536         ENTRY(VFW_E_DVD_WRONG_SPEED);
 537         ENTRY(VFW_E_DVD_MENU_DOES_NOT_EXIST);
 538         ENTRY(VFW_E_DVD_CMD_CANCELLED);
 539         ENTRY(VFW_E_DVD_STATE_WRONG_VERSION);
 540         ENTRY(VFW_E_DVD_STATE_CORRUPT);
 541         ENTRY(VFW_E_DVD_STATE_WRONG_DISC);
 542         ENTRY(VFW_E_DVD_INCOMPATIBLE_REGION);
 543         ENTRY(VFW_E_DVD_NO_ATTRIBUTES);
 544         ENTRY(VFW_E_DVD_NO_GOUP_PGC);
 545         ENTRY(VFW_E_DVD_LOW_PARENTAL_LEVEL);
 546         ENTRY(VFW_E_DVD_NOT_IN_KARAOKE_MODE);
 547         ENTRY(VFW_S_DVD_CHANNEL_CONTENTS_NOT_AVAILABLE);
 548         ENTRY(VFW_S_DVD_NOT_ACCURATE);
 549         ENTRY(VFW_E_FRAME_STEP_UNSUPPORTED);
 550         ENTRY(VFW_E_DVD_STREAM_DISABLED);
 551         ENTRY(VFW_E_DVD_TITLE_UNKNOWN);
 552         ENTRY(VFW_E_DVD_INVALID_DISC);
 553         ENTRY(VFW_E_DVD_NO_RESUME_INFORMATION);
 554         ENTRY(VFW_E_PIN_ALREADY_BLOCKED_ON_THIS_THREAD);
 555         ENTRY(VFW_E_PIN_ALREADY_BLOCKED);
 556         ENTRY(VFW_E_CERTIFICATION_FAILURE);
 557         #undef  ENTRY
 558         }
 559
 560         return NULL;
 561 }
 562
 563 /***********************************************************************
 564  *      AMGetErrorTextA (quartz.@)
 565  */
 566 DWORD WINAPI AMGetErrorTextA(HRESULT hr, LPSTR pszbuf, DWORD dwBufLen)
 567 {
 568         LPCSTR  lpszRes;
 569         DWORD len;
 570
 571         lpszRes = hresult_to_string( hr );
 572         if ( lpszRes == NULL )
 573                 return 0;
 574         len = (DWORD)(strlen(lpszRes)+1);
 575         if ( len > dwBufLen )
 576                 return 0;
 577
 578         memcpy( pszbuf, lpszRes, len );
 579         return len;
 580 }
 581
 582 /***********************************************************************
 583  *      AMGetErrorTextW (quartz.@)
 584  */
 585 DWORD WINAPI AMGetErrorTextW(HRESULT hr, LPWSTR pwszbuf, DWORD dwBufLen)
 586 {
 587         CHAR    szBuf[MAX_ERROR_TEXT_LEN+1];
 588         DWORD   dwLen;
 589
 590         dwLen = AMGetErrorTextA(hr,szBuf,MAX_ERROR_TEXT_LEN);
 591         if ( dwLen == 0 )
 592                 return 0;
 593         szBuf[dwLen] = 0;
 594
 595         QUARTZ_strncpyAtoW( pwszbuf, szBuf, dwBufLen );
 596
 597         return lstrlenW( pwszbuf );
 598 }