git.oblomov.eu Git - wine/blob - dlls/quartz/main.c

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