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 #include "capgraph.h"
  54 #include "filesink.h"
  55
  56
  57 typedef struct QUARTZ_CLASSENTRY
  58 {
  59         const CLSID*    pclsid;
  60         QUARTZ_pCreateIUnknown  pCreateIUnk;
  61 } QUARTZ_CLASSENTRY;
  62
  63
  64 static HRESULT WINAPI
  65 IClassFactory_fnQueryInterface(LPCLASSFACTORY iface,REFIID riid,LPVOID *ppobj);
  66 static ULONG WINAPI IClassFactory_fnAddRef(LPCLASSFACTORY iface);
  67 static ULONG WINAPI IClassFactory_fnRelease(LPCLASSFACTORY iface);
  68 static HRESULT WINAPI IClassFactory_fnCreateInstance(LPCLASSFACTORY iface,LPUNKNOWN pOuter,REFIID riid,LPVOID *ppobj);
  69 static HRESULT WINAPI IClassFactory_fnLockServer(LPCLASSFACTORY iface,BOOL dolock);
  70
  71 static ICOM_VTABLE(IClassFactory) iclassfact =
  72 {
  73         ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
  74         IClassFactory_fnQueryInterface,
  75         IClassFactory_fnAddRef,
  76         IClassFactory_fnRelease,
  77         IClassFactory_fnCreateInstance,
  78         IClassFactory_fnLockServer
  79 };
  80
  81 typedef struct
  82 {
  83         /* IUnknown fields */
  84         ICOM_VFIELD(IClassFactory);
  85         LONG    ref;
  86         /* IClassFactory fields */
  87         const QUARTZ_CLASSENTRY* pEntry;
  88 } IClassFactoryImpl;
  89
  90 static const QUARTZ_CLASSENTRY QUARTZ_ClassList[] =
  91 {
  92         { &CLSID_FilterGraph, &QUARTZ_CreateFilterGraph },
  93         { &CLSID_FilterGraphNoThread, &QUARTZ_CreateFilterGraph }, /* FIXME? */
  94         { &CLSID_SystemClock, &QUARTZ_CreateSystemClock },
  95         { &CLSID_MemoryAllocator, &QUARTZ_CreateMemoryAllocator },
  96         { &CLSID_SystemDeviceEnum, &QUARTZ_CreateSystemDeviceEnum },
  97         { &CLSID_FilterMapper, &QUARTZ_CreateFilterMapper },
  98         { &CLSID_FilterMapper2, &QUARTZ_CreateFilterMapper2 },
  99         { &CLSID_SeekingPassThru, &QUARTZ_CreateSeekingPassThru },
 100         { &CLSID_CaptureGraphBuilder, &QUARTZ_CreateCaptureGraph },
 101
 102         { &CLSID_AudioRender, &QUARTZ_CreateAudioRenderer },
 103         { &CLSID_VideoRenderer, &QUARTZ_CreateVideoRenderer },
 104         { &CLSID_quartzWaveParser, &QUARTZ_CreateWaveParser },
 105         { &CLSID_AviSplitter, &QUARTZ_CreateAVISplitter },
 106         { &CLSID_MPEG1Splitter, &QUARTZ_CreateMPEG1Splitter },
 107         { &CLSID_AsyncReader, &QUARTZ_CreateAsyncReader },
 108         { &CLSID_URLReader, &QUARTZ_CreateURLReader },
 109         { &CLSID_AVIDec, &QUARTZ_CreateAVIDec },
 110         { &CLSID_Colour, &QUARTZ_CreateColour },
 111         { &CLSID_ACMWrapper, &QUARTZ_CreateACMWrapper },
 112         { &CLSID_FileWriter, &QUARTZ_CreateFileWriter },
 113         { NULL, NULL },
 114 };
 115
 116 /* per-process variables */
 117 static CRITICAL_SECTION csHeap;
 118 static DWORD dwClassObjRef;
 119 static HANDLE hDLLHeap;
 120
 121 void* QUARTZ_AllocObj( DWORD dwSize )
 122 {
 123         void*   pv;
 124
 125         EnterCriticalSection( &csHeap );
 126         dwClassObjRef ++;
 127         pv = HeapAlloc( hDLLHeap, 0, dwSize );
 128         if ( pv == NULL )
 129                 dwClassObjRef --;
 130         LeaveCriticalSection( &csHeap );
 131
 132         return pv;
 133 }
 134
 135 void QUARTZ_FreeObj( void* pobj )
 136 {
 137         EnterCriticalSection( &csHeap );
 138         HeapFree( hDLLHeap, 0, pobj );
 139         dwClassObjRef --;
 140         LeaveCriticalSection( &csHeap );
 141 }
 142
 143 void* QUARTZ_AllocMem( DWORD dwSize )
 144 {
 145         return HeapAlloc( hDLLHeap, 0, dwSize );
 146 }
 147
 148 void QUARTZ_FreeMem( void* pMem )
 149 {
 150         HeapFree( hDLLHeap, 0, pMem );
 151 }
 152
 153 void* QUARTZ_ReallocMem( void* pMem, DWORD dwSize )
 154 {
 155         if ( pMem == NULL )
 156                 return QUARTZ_AllocMem( dwSize );
 157
 158         return HeapReAlloc( hDLLHeap, 0, pMem, dwSize );
 159 }
 160
 161 static
 162 LPWSTR QUARTZ_strncpyAtoW( LPWSTR lpwstr, LPCSTR lpstr, INT wbuflen )
 163 {
 164         INT     len;
 165
 166         len = MultiByteToWideChar( CP_ACP, 0, lpstr, -1, lpwstr, wbuflen );
 167         if ( len == 0 )
 168                 *lpwstr = 0;
 169         return lpwstr;
 170 }
 171
 172
 173 /************************************************************************/
 174
 175 static HRESULT WINAPI
 176 IClassFactory_fnQueryInterface(LPCLASSFACTORY iface,REFIID riid,LPVOID *ppobj)
 177 {
 178         ICOM_THIS(IClassFactoryImpl,iface);
 179
 180         TRACE("(%p)->(%p,%p)\n",This,riid,ppobj);
 181         if ( ( IsEqualGUID( &IID_IUnknown, riid ) ) ||
 182              ( IsEqualGUID( &IID_IClassFactory, riid ) ) )
 183         {
 184                 *ppobj = iface;
 185                 IClassFactory_AddRef(iface);
 186                 return S_OK;
 187         }
 188
 189         return E_NOINTERFACE;
 190 }
 191
 192 static ULONG WINAPI IClassFactory_fnAddRef(LPCLASSFACTORY iface)
 193 {
 194         ICOM_THIS(IClassFactoryImpl,iface);
 195
 196         TRACE("(%p)->()\n",This);
 197
 198         return InterlockedExchangeAdd(&(This->ref),1) + 1;
 199 }
 200
 201 static ULONG WINAPI IClassFactory_fnRelease(LPCLASSFACTORY iface)
 202 {
 203         ICOM_THIS(IClassFactoryImpl,iface);
 204         LONG    ref;
 205
 206         TRACE("(%p)->()\n",This);
 207         ref = InterlockedExchangeAdd(&(This->ref),-1) - 1;
 208         if ( ref > 0 )
 209                 return (ULONG)ref;
 210
 211         QUARTZ_FreeObj(This);
 212         return 0;
 213 }
 214
 215 static HRESULT WINAPI IClassFactory_fnCreateInstance(LPCLASSFACTORY iface,LPUNKNOWN pOuter,REFIID riid,LPVOID *ppobj)
 216 {
 217         ICOM_THIS(IClassFactoryImpl,iface);
 218         HRESULT hr;
 219         IUnknown*       punk;
 220
 221         TRACE("(%p)->(%p,%s,%p)\n",This,pOuter,debugstr_guid(riid),ppobj);
 222
 223         if ( ppobj == NULL )
 224                 return E_POINTER;
 225         if ( pOuter != NULL && !IsEqualGUID( riid, &IID_IUnknown ) )
 226                 return CLASS_E_NOAGGREGATION;
 227
 228         *ppobj = NULL;
 229
 230         hr = (*This->pEntry->pCreateIUnk)(pOuter,(void**)&punk);
 231         if ( hr != S_OK )
 232                 return hr;
 233
 234         hr = IUnknown_QueryInterface(punk,riid,ppobj);
 235         IUnknown_Release(punk);
 236
 237         return hr;
 238 }
 239
 240 static HRESULT WINAPI IClassFactory_fnLockServer(LPCLASSFACTORY iface,BOOL dolock)
 241 {
 242         ICOM_THIS(IClassFactoryImpl,iface);
 243         HRESULT hr;
 244
 245         TRACE("(%p)->(%d)\n",This,dolock);
 246         if (dolock)
 247                 hr = IClassFactory_AddRef(iface);
 248         else
 249                 hr = IClassFactory_Release(iface);
 250
 251         return hr;
 252 }
 253
 254
 255
 256 static HRESULT IClassFactory_Alloc( const CLSID* pclsid, void** ppobj )
 257 {
 258         const QUARTZ_CLASSENTRY*        pEntry;
 259         IClassFactoryImpl*      pImpl;
 260
 261         TRACE( "(%s,%p)\n", debugstr_guid(pclsid), ppobj );
 262
 263         pEntry = QUARTZ_ClassList;
 264         while ( pEntry->pclsid != NULL )
 265         {
 266                 if ( IsEqualGUID( pclsid, pEntry->pclsid ) )
 267                         goto found;
 268                 pEntry ++;
 269         }
 270
 271         return CLASS_E_CLASSNOTAVAILABLE;
 272 found:
 273         pImpl = (IClassFactoryImpl*)QUARTZ_AllocObj( sizeof(IClassFactoryImpl) );
 274         if ( pImpl == NULL )
 275                 return E_OUTOFMEMORY;
 276
 277         TRACE( "allocated successfully.\n" );
 278
 279         ICOM_VTBL(pImpl) = &iclassfact;
 280         pImpl->ref = 1;
 281         pImpl->pEntry = pEntry;
 282
 283         *ppobj = (void*)pImpl;
 284         return S_OK;
 285 }
 286
 287
 288 /***********************************************************************
 289  *              QUARTZ_InitProcess (internal)
 290  */
 291 static BOOL QUARTZ_InitProcess( void )
 292 {
 293         TRACE("()\n");
 294
 295         dwClassObjRef = 0;
 296         hDLLHeap = (HANDLE)NULL;
 297         InitializeCriticalSection( &csHeap );
 298
 299         hDLLHeap = HeapCreate( 0, 0x10000, 0 );
 300         if ( hDLLHeap == (HANDLE)NULL )
 301                 return FALSE;
 302
 303         return TRUE;
 304 }
 305
 306 /***********************************************************************
 307  *              QUARTZ_UninitProcess (internal)
 308  */
 309 static void QUARTZ_UninitProcess( void )
 310 {
 311         TRACE("()\n");
 312
 313         if ( dwClassObjRef != 0 )
 314                 ERR( "you must release some objects allocated from quartz.\n" );
 315         if ( hDLLHeap != (HANDLE)NULL )
 316         {
 317                 HeapDestroy( hDLLHeap );
 318                 hDLLHeap = (HANDLE)NULL;
 319         }
 320         DeleteCriticalSection( &csHeap );
 321 }
 322
 323 /***********************************************************************
 324  *              QUARTZ_DllMain
 325  */
 326 BOOL WINAPI QUARTZ_DllMain(
 327         HINSTANCE hInstDLL,
 328         DWORD fdwReason,
 329         LPVOID lpvReserved )
 330 {
 331         TRACE("(%08x,%08lx,%p)\n",hInstDLL,fdwReason,lpvReserved);
 332
 333         switch ( fdwReason )
 334         {
 335         case DLL_PROCESS_ATTACH:
 336                 if ( !QUARTZ_InitProcess() )
 337                         return FALSE;
 338                 break;
 339         case DLL_PROCESS_DETACH:
 340                 QUARTZ_UninitProcess();
 341                 break;
 342         case DLL_THREAD_ATTACH:
 343                 break;
 344         case DLL_THREAD_DETACH:
 345                 break;
 346         }
 347
 348         return TRUE;
 349 }
 350
 351
 352 /***********************************************************************
 353  *              DllCanUnloadNow (QUARTZ.@)
 354  *
 355  * RETURNS
 356  *    Success: S_OK
 357  *    Failure: S_FALSE
 358  */
 359 HRESULT WINAPI QUARTZ_DllCanUnloadNow(void)
 360 {
 361         HRESULT hr;
 362
 363         EnterCriticalSection( &csHeap );
 364         hr = ( dwClassObjRef == 0 ) ? S_OK : S_FALSE;
 365         LeaveCriticalSection( &csHeap );
 366
 367         return hr;
 368 }
 369
 370 /***********************************************************************
 371  *              DllGetClassObject (QUARTZ.@)
 372  */
 373 HRESULT WINAPI QUARTZ_DllGetClassObject(
 374                 const CLSID* pclsid,const IID* piid,void** ppv)
 375 {
 376         *ppv = NULL;
 377         if ( IsEqualCLSID( &IID_IUnknown, piid ) ||
 378              IsEqualCLSID( &IID_IClassFactory, piid ) )
 379         {
 380                 return IClassFactory_Alloc( pclsid, ppv );
 381         }
 382
 383         return CLASS_E_CLASSNOTAVAILABLE;
 384 }
 385
 386 /***********************************************************************
 387  *              DllRegisterServer (QUARTZ.@)
 388  */
 389
 390 HRESULT WINAPI QUARTZ_DllRegisterServer( void )
 391 {
 392         FIXME( "(): stub\n" );
 393         return E_FAIL;
 394 }
 395
 396 /***********************************************************************
 397  *              DllUnregisterServer (QUARTZ.@)
 398  */
 399
 400 HRESULT WINAPI QUARTZ_DllUnregisterServer( void )
 401 {
 402         FIXME( "(): stub\n" );
 403         return E_FAIL;
 404 }
 405
 406 /**************************************************************************/
 407 /**************************************************************************/
 408
 409 /* FIXME - all string should be defined in the resource of quartz. */
 410
 411 static LPCSTR hresult_to_string( HRESULT hr )
 412 {
 413         switch ( hr )
 414         {
 415         #define ENTRY(x)        case x: return (const char*)#x
 416         /* some known codes */
 417         ENTRY(S_OK);
 418         ENTRY(S_FALSE);
 419         ENTRY(E_FAIL);
 420         ENTRY(E_POINTER);
 421         ENTRY(E_NOTIMPL);
 422         ENTRY(E_NOINTERFACE);
 423         ENTRY(E_OUTOFMEMORY);
 424         ENTRY(CLASS_E_CLASSNOTAVAILABLE);
 425         ENTRY(CLASS_E_NOAGGREGATION);
 426
 427         /* vfwmsgs.h */
 428         ENTRY(VFW_S_NO_MORE_ITEMS);
 429         ENTRY(VFW_E_BAD_KEY);
 430         ENTRY(VFW_E_INVALIDMEDIATYPE);
 431         ENTRY(VFW_E_INVALIDSUBTYPE);
 432         ENTRY(VFW_E_NEED_OWNER);
 433         ENTRY(VFW_E_ENUM_OUT_OF_SYNC);
 434         ENTRY(VFW_E_ALREADY_CONNECTED);
 435         ENTRY(VFW_E_FILTER_ACTIVE);
 436         ENTRY(VFW_E_NO_TYPES);
 437         ENTRY(VFW_E_NO_ACCEPTABLE_TYPES);
 438         ENTRY(VFW_E_INVALID_DIRECTION);
 439         ENTRY(VFW_E_NOT_CONNECTED);
 440         ENTRY(VFW_E_NO_ALLOCATOR);
 441         ENTRY(VFW_E_RUNTIME_ERROR);
 442         ENTRY(VFW_E_BUFFER_NOTSET);
 443         ENTRY(VFW_E_BUFFER_OVERFLOW);
 444         ENTRY(VFW_E_BADALIGN);
 445         ENTRY(VFW_E_ALREADY_COMMITTED);
 446         ENTRY(VFW_E_BUFFERS_OUTSTANDING);
 447         ENTRY(VFW_E_NOT_COMMITTED);
 448         ENTRY(VFW_E_SIZENOTSET);
 449         ENTRY(VFW_E_NO_CLOCK);
 450         ENTRY(VFW_E_NO_SINK);
 451         ENTRY(VFW_E_NO_INTERFACE);
 452         ENTRY(VFW_E_NOT_FOUND);
 453         ENTRY(VFW_E_CANNOT_CONNECT);
 454         ENTRY(VFW_E_CANNOT_RENDER);
 455         ENTRY(VFW_E_CHANGING_FORMAT);
 456         ENTRY(VFW_E_NO_COLOR_KEY_SET);
 457         ENTRY(VFW_E_NOT_OVERLAY_CONNECTION);
 458         ENTRY(VFW_E_NOT_SAMPLE_CONNECTION);
 459         ENTRY(VFW_E_PALETTE_SET);
 460         ENTRY(VFW_E_COLOR_KEY_SET);
 461         ENTRY(VFW_E_NO_COLOR_KEY_FOUND);
 462         ENTRY(VFW_E_NO_PALETTE_AVAILABLE);
 463         ENTRY(VFW_E_NO_DISPLAY_PALETTE);
 464         ENTRY(VFW_E_TOO_MANY_COLORS);
 465         ENTRY(VFW_E_STATE_CHANGED);
 466         ENTRY(VFW_E_NOT_STOPPED);
 467         ENTRY(VFW_E_NOT_PAUSED);
 468         ENTRY(VFW_E_NOT_RUNNING);
 469         ENTRY(VFW_E_WRONG_STATE);
 470         ENTRY(VFW_E_START_TIME_AFTER_END);
 471         ENTRY(VFW_E_INVALID_RECT);
 472         ENTRY(VFW_E_TYPE_NOT_ACCEPTED);
 473         ENTRY(VFW_E_SAMPLE_REJECTED);
 474         ENTRY(VFW_E_SAMPLE_REJECTED_EOS);
 475         ENTRY(VFW_S_DUPLICATE_NAME);
 476         ENTRY(VFW_E_DUPLICATE_NAME);
 477         ENTRY(VFW_E_TIMEOUT);
 478         ENTRY(VFW_E_INVALID_FILE_FORMAT);
 479         ENTRY(VFW_E_ENUM_OUT_OF_RANGE);
 480         ENTRY(VFW_E_CIRCULAR_GRAPH);
 481         ENTRY(VFW_E_NOT_ALLOWED_TO_SAVE);
 482         ENTRY(VFW_E_TIME_ALREADY_PASSED);
 483         ENTRY(VFW_E_ALREADY_CANCELLED);
 484         ENTRY(VFW_E_CORRUPT_GRAPH_FILE);
 485         ENTRY(VFW_E_ADVISE_ALREADY_SET);
 486         ENTRY(VFW_S_STATE_INTERMEDIATE);
 487         ENTRY(VFW_E_NO_MODEX_AVAILABLE);
 488         ENTRY(VFW_E_NO_ADVISE_SET);
 489         ENTRY(VFW_E_NO_FULLSCREEN);
 490         ENTRY(VFW_E_IN_FULLSCREEN_MODE);
 491         ENTRY(VFW_E_UNKNOWN_FILE_TYPE);
 492         ENTRY(VFW_E_CANNOT_LOAD_SOURCE_FILTER);
 493         ENTRY(VFW_S_PARTIAL_RENDER);
 494         ENTRY(VFW_E_FILE_TOO_SHORT);
 495         ENTRY(VFW_E_INVALID_FILE_VERSION);
 496         ENTRY(VFW_S_SOME_DATA_IGNORED);
 497         ENTRY(VFW_S_CONNECTIONS_DEFERRED);
 498         ENTRY(VFW_E_INVALID_CLSID);
 499         ENTRY(VFW_E_INVALID_MEDIA_TYPE);
 500         ENTRY(VFW_E_SAMPLE_TIME_NOT_SET);
 501         ENTRY(VFW_S_RESOURCE_NOT_NEEDED);
 502         ENTRY(VFW_E_MEDIA_TIME_NOT_SET);
 503         ENTRY(VFW_E_NO_TIME_FORMAT_SET);
 504         ENTRY(VFW_E_MONO_AUDIO_HW);
 505         ENTRY(VFW_S_MEDIA_TYPE_IGNORED);
 506         ENTRY(VFW_E_NO_DECOMPRESSOR);
 507         ENTRY(VFW_E_NO_AUDIO_HARDWARE);
 508         ENTRY(VFW_S_VIDEO_NOT_RENDERED);
 509         ENTRY(VFW_S_AUDIO_NOT_RENDERED);
 510         ENTRY(VFW_E_RPZA);
 511         ENTRY(VFW_S_RPZA);
 512         ENTRY(VFW_E_PROCESSOR_NOT_SUITABLE);
 513         ENTRY(VFW_E_UNSUPPORTED_AUDIO);
 514         ENTRY(VFW_E_UNSUPPORTED_VIDEO);
 515         ENTRY(VFW_E_MPEG_NOT_CONSTRAINED);
 516         ENTRY(VFW_E_NOT_IN_GRAPH);
 517         ENTRY(VFW_S_ESTIMATED);
 518         ENTRY(VFW_E_NO_TIME_FORMAT);
 519         ENTRY(VFW_E_READ_ONLY);
 520         ENTRY(VFW_S_RESERVED);
 521         ENTRY(VFW_E_BUFFER_UNDERFLOW);
 522         ENTRY(VFW_E_UNSUPPORTED_STREAM);
 523         ENTRY(VFW_E_NO_TRANSPORT);
 524         ENTRY(VFW_S_STREAM_OFF);
 525         ENTRY(VFW_S_CANT_CUE);
 526         ENTRY(VFW_E_BAD_VIDEOCD);
 527         ENTRY(VFW_S_NO_STOP_TIME);
 528         ENTRY(VFW_E_OUT_OF_VIDEO_MEMORY);
 529         ENTRY(VFW_E_VP_NEGOTIATION_FAILED);
 530         ENTRY(VFW_E_DDRAW_CAPS_NOT_SUITABLE);
 531         ENTRY(VFW_E_NO_VP_HARDWARE);
 532         ENTRY(VFW_E_NO_CAPTURE_HARDWARE);
 533         ENTRY(VFW_E_DVD_OPERATION_INHIBITED);
 534         ENTRY(VFW_E_DVD_INVALIDDOMAIN);
 535         ENTRY(VFW_E_DVD_NO_BUTTON);
 536         ENTRY(VFW_E_DVD_GRAPHNOTREADY);
 537         ENTRY(VFW_E_DVD_RENDERFAIL);
 538         ENTRY(VFW_E_DVD_DECNOTENOUGH);
 539         ENTRY(VFW_E_DDRAW_VERSION_NOT_SUITABLE);
 540         ENTRY(VFW_E_COPYPROT_FAILED);
 541         ENTRY(VFW_S_NOPREVIEWPIN);
 542         ENTRY(VFW_E_TIME_EXPIRED);
 543         ENTRY(VFW_S_DVD_NON_ONE_SEQUENTIAL);
 544         ENTRY(VFW_E_DVD_WRONG_SPEED);
 545         ENTRY(VFW_E_DVD_MENU_DOES_NOT_EXIST);
 546         ENTRY(VFW_E_DVD_CMD_CANCELLED);
 547         ENTRY(VFW_E_DVD_STATE_WRONG_VERSION);
 548         ENTRY(VFW_E_DVD_STATE_CORRUPT);
 549         ENTRY(VFW_E_DVD_STATE_WRONG_DISC);
 550         ENTRY(VFW_E_DVD_INCOMPATIBLE_REGION);
 551         ENTRY(VFW_E_DVD_NO_ATTRIBUTES);
 552         ENTRY(VFW_E_DVD_NO_GOUP_PGC);
 553         ENTRY(VFW_E_DVD_LOW_PARENTAL_LEVEL);
 554         ENTRY(VFW_E_DVD_NOT_IN_KARAOKE_MODE);
 555         ENTRY(VFW_S_DVD_CHANNEL_CONTENTS_NOT_AVAILABLE);
 556         ENTRY(VFW_S_DVD_NOT_ACCURATE);
 557         ENTRY(VFW_E_FRAME_STEP_UNSUPPORTED);
 558         ENTRY(VFW_E_DVD_STREAM_DISABLED);
 559         ENTRY(VFW_E_DVD_TITLE_UNKNOWN);
 560         ENTRY(VFW_E_DVD_INVALID_DISC);
 561         ENTRY(VFW_E_DVD_NO_RESUME_INFORMATION);
 562         ENTRY(VFW_E_PIN_ALREADY_BLOCKED_ON_THIS_THREAD);
 563         ENTRY(VFW_E_PIN_ALREADY_BLOCKED);
 564         ENTRY(VFW_E_CERTIFICATION_FAILURE);
 565         #undef  ENTRY
 566         }
 567
 568         return NULL;
 569 }
 570
 571 /***********************************************************************
 572  *      AMGetErrorTextA (quartz.@)
 573  */
 574 DWORD WINAPI AMGetErrorTextA(HRESULT hr, LPSTR pszbuf, DWORD dwBufLen)
 575 {
 576         LPCSTR  lpszRes;
 577         DWORD len;
 578
 579         lpszRes = hresult_to_string( hr );
 580         if ( lpszRes == NULL )
 581                 return 0;
 582         len = (DWORD)(strlen(lpszRes)+1);
 583         if ( len > dwBufLen )
 584                 return 0;
 585
 586         memcpy( pszbuf, lpszRes, len );
 587         return len;
 588 }
 589
 590 /***********************************************************************
 591  *      AMGetErrorTextW (quartz.@)
 592  */
 593 DWORD WINAPI AMGetErrorTextW(HRESULT hr, LPWSTR pwszbuf, DWORD dwBufLen)
 594 {
 595         CHAR    szBuf[MAX_ERROR_TEXT_LEN+1];
 596         DWORD   dwLen;
 597
 598         dwLen = AMGetErrorTextA(hr,szBuf,MAX_ERROR_TEXT_LEN);
 599         if ( dwLen == 0 )
 600                 return 0;
 601         szBuf[dwLen] = 0;
 602
 603         QUARTZ_strncpyAtoW( pwszbuf, szBuf, dwBufLen );
 604
 605         return lstrlenW( pwszbuf );
 606 }