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_SystemClock, &QUARTZ_CreateSystemClock },
  94         { &CLSID_MemoryAllocator, &QUARTZ_CreateMemoryAllocator },
  95         { &CLSID_SystemDeviceEnum, &QUARTZ_CreateSystemDeviceEnum },
  96         { &CLSID_FilterMapper, &QUARTZ_CreateFilterMapper },
  97         { &CLSID_FilterMapper2, &QUARTZ_CreateFilterMapper2 },
  98         { &CLSID_SeekingPassThru, &QUARTZ_CreateSeekingPassThru },
  99         { &CLSID_CaptureGraphBuilder, &QUARTZ_CreateCaptureGraph },
 100         { &CLSID_CaptureGraphBuilder2, &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_AsyncReader, &QUARTZ_CreateAsyncReader },
 107         { &CLSID_URLReader, &QUARTZ_CreateURLReader },
 108         { &CLSID_AVIDec, &QUARTZ_CreateAVIDec },
 109         { &CLSID_Colour, &QUARTZ_CreateColour },
 110         { &CLSID_FileWriter, &QUARTZ_CreateFileWriter },
 111         { NULL, NULL },
 112 };
 113
 114 /* per-process variables */
 115 static CRITICAL_SECTION csHeap;
 116 static DWORD dwClassObjRef;
 117 static HANDLE hDLLHeap;
 118
 119 void* QUARTZ_AllocObj( DWORD dwSize )
 120 {
 121         void*   pv;
 122
 123         EnterCriticalSection( &csHeap );
 124         dwClassObjRef ++;
 125         pv = HeapAlloc( hDLLHeap, 0, dwSize );
 126         if ( pv == NULL )
 127                 dwClassObjRef --;
 128         LeaveCriticalSection( &csHeap );
 129
 130         return pv;
 131 }
 132
 133 void QUARTZ_FreeObj( void* pobj )
 134 {
 135         EnterCriticalSection( &csHeap );
 136         HeapFree( hDLLHeap, 0, pobj );
 137         dwClassObjRef --;
 138         LeaveCriticalSection( &csHeap );
 139 }
 140
 141 void* QUARTZ_AllocMem( DWORD dwSize )
 142 {
 143         return HeapAlloc( hDLLHeap, 0, dwSize );
 144 }
 145
 146 void QUARTZ_FreeMem( void* pMem )
 147 {
 148         HeapFree( hDLLHeap, 0, pMem );
 149 }
 150
 151 void* QUARTZ_ReallocMem( void* pMem, DWORD dwSize )
 152 {
 153         if ( pMem == NULL )
 154                 return QUARTZ_AllocMem( dwSize );
 155
 156         return HeapReAlloc( hDLLHeap, 0, pMem, dwSize );
 157 }
 158
 159 static
 160 LPWSTR QUARTZ_strncpyAtoW( LPWSTR lpwstr, LPCSTR lpstr, INT wbuflen )
 161 {
 162         INT     len;
 163
 164         len = MultiByteToWideChar( CP_ACP, 0, lpstr, -1, lpwstr, wbuflen );
 165         if ( len == 0 )
 166                 *lpwstr = 0;
 167         return lpwstr;
 168 }
 169
 170
 171 /************************************************************************/
 172
 173 static HRESULT WINAPI
 174 IClassFactory_fnQueryInterface(LPCLASSFACTORY iface,REFIID riid,LPVOID *ppobj)
 175 {
 176         ICOM_THIS(IClassFactoryImpl,iface);
 177
 178         TRACE("(%p)->(%p,%p)\n",This,riid,ppobj);
 179         if ( ( IsEqualGUID( &IID_IUnknown, riid ) ) ||
 180              ( IsEqualGUID( &IID_IClassFactory, riid ) ) )
 181         {
 182                 *ppobj = iface;
 183                 IClassFactory_AddRef(iface);
 184                 return S_OK;
 185         }
 186
 187         return E_NOINTERFACE;
 188 }
 189
 190 static ULONG WINAPI IClassFactory_fnAddRef(LPCLASSFACTORY iface)
 191 {
 192         ICOM_THIS(IClassFactoryImpl,iface);
 193
 194         TRACE("(%p)->()\n",This);
 195
 196         return InterlockedExchangeAdd(&(This->ref),1) + 1;
 197 }
 198
 199 static ULONG WINAPI IClassFactory_fnRelease(LPCLASSFACTORY iface)
 200 {
 201         ICOM_THIS(IClassFactoryImpl,iface);
 202         LONG    ref;
 203
 204         TRACE("(%p)->()\n",This);
 205         ref = InterlockedExchangeAdd(&(This->ref),-1) - 1;
 206         if ( ref > 0 )
 207                 return (ULONG)ref;
 208
 209         QUARTZ_FreeObj(This);
 210         return 0;
 211 }
 212
 213 static HRESULT WINAPI IClassFactory_fnCreateInstance(LPCLASSFACTORY iface,LPUNKNOWN pOuter,REFIID riid,LPVOID *ppobj)
 214 {
 215         ICOM_THIS(IClassFactoryImpl,iface);
 216         HRESULT hr;
 217         IUnknown*       punk;
 218
 219         TRACE("(%p)->(%p,%s,%p)\n",This,pOuter,debugstr_guid(riid),ppobj);
 220
 221         if ( ppobj == NULL )
 222                 return E_POINTER;
 223         if ( pOuter != NULL && !IsEqualGUID( riid, &IID_IUnknown ) )
 224                 return CLASS_E_NOAGGREGATION;
 225
 226         *ppobj = NULL;
 227
 228         hr = (*This->pEntry->pCreateIUnk)(pOuter,(void**)&punk);
 229         if ( hr != S_OK )
 230                 return hr;
 231
 232         hr = IUnknown_QueryInterface(punk,riid,ppobj);
 233         IUnknown_Release(punk);
 234
 235         return hr;
 236 }
 237
 238 static HRESULT WINAPI IClassFactory_fnLockServer(LPCLASSFACTORY iface,BOOL dolock)
 239 {
 240         ICOM_THIS(IClassFactoryImpl,iface);
 241         HRESULT hr;
 242
 243         TRACE("(%p)->(%d)\n",This,dolock);
 244         if (dolock)
 245                 hr = IClassFactory_AddRef(iface);
 246         else
 247                 hr = IClassFactory_Release(iface);
 248
 249         return hr;
 250 }
 251
 252
 253
 254 static HRESULT IClassFactory_Alloc( const CLSID* pclsid, void** ppobj )
 255 {
 256         const QUARTZ_CLASSENTRY*        pEntry;
 257         IClassFactoryImpl*      pImpl;
 258
 259         TRACE( "(%s,%p)\n", debugstr_guid(pclsid), ppobj );
 260
 261         pEntry = QUARTZ_ClassList;
 262         while ( pEntry->pclsid != NULL )
 263         {
 264                 if ( IsEqualGUID( pclsid, pEntry->pclsid ) )
 265                         goto found;
 266                 pEntry ++;
 267         }
 268
 269         return CLASS_E_CLASSNOTAVAILABLE;
 270 found:
 271         pImpl = (IClassFactoryImpl*)QUARTZ_AllocObj( sizeof(IClassFactoryImpl) );
 272         if ( pImpl == NULL )
 273                 return E_OUTOFMEMORY;
 274
 275         TRACE( "allocated successfully.\n" );
 276
 277         ICOM_VTBL(pImpl) = &iclassfact;
 278         pImpl->ref = 1;
 279         pImpl->pEntry = pEntry;
 280
 281         *ppobj = (void*)pImpl;
 282         return S_OK;
 283 }
 284
 285
 286 /***********************************************************************
 287  *              QUARTZ_InitProcess (internal)
 288  */
 289 static BOOL QUARTZ_InitProcess( void )
 290 {
 291         TRACE("()\n");
 292
 293         dwClassObjRef = 0;
 294         hDLLHeap = (HANDLE)NULL;
 295         InitializeCriticalSection( &csHeap );
 296
 297         hDLLHeap = HeapCreate( 0, 0x10000, 0 );
 298         if ( hDLLHeap == (HANDLE)NULL )
 299                 return FALSE;
 300
 301         return TRUE;
 302 }
 303
 304 /***********************************************************************
 305  *              QUARTZ_UninitProcess (internal)
 306  */
 307 static void QUARTZ_UninitProcess( void )
 308 {
 309         TRACE("()\n");
 310
 311         if ( dwClassObjRef != 0 )
 312                 ERR( "you must release some objects allocated from quartz.\n" );
 313         if ( hDLLHeap != (HANDLE)NULL )
 314         {
 315                 HeapDestroy( hDLLHeap );
 316                 hDLLHeap = (HANDLE)NULL;
 317         }
 318         DeleteCriticalSection( &csHeap );
 319 }
 320
 321 /***********************************************************************
 322  *              QUARTZ_DllMain
 323  */
 324 BOOL WINAPI QUARTZ_DllMain(
 325         HINSTANCE hInstDLL,
 326         DWORD fdwReason,
 327         LPVOID lpvReserved )
 328 {
 329         TRACE("(%08x,%08lx,%p)\n",hInstDLL,fdwReason,lpvReserved);
 330
 331         switch ( fdwReason )
 332         {
 333         case DLL_PROCESS_ATTACH:
 334                 if ( !QUARTZ_InitProcess() )
 335                         return FALSE;
 336                 break;
 337         case DLL_PROCESS_DETACH:
 338                 QUARTZ_UninitProcess();
 339                 break;
 340         case DLL_THREAD_ATTACH:
 341                 break;
 342         case DLL_THREAD_DETACH:
 343                 break;
 344         }
 345
 346         return TRUE;
 347 }
 348
 349
 350 /***********************************************************************
 351  *              DllCanUnloadNow (QUARTZ.@)
 352  *
 353  * RETURNS
 354  *    Success: S_OK
 355  *    Failure: S_FALSE
 356  */
 357 HRESULT WINAPI QUARTZ_DllCanUnloadNow(void)
 358 {
 359         HRESULT hr;
 360
 361         EnterCriticalSection( &csHeap );
 362         hr = ( dwClassObjRef == 0 ) ? S_OK : S_FALSE;
 363         LeaveCriticalSection( &csHeap );
 364
 365         return hr;
 366 }
 367
 368 /***********************************************************************
 369  *              DllGetClassObject (QUARTZ.@)
 370  */
 371 HRESULT WINAPI QUARTZ_DllGetClassObject(
 372                 const CLSID* pclsid,const IID* piid,void** ppv)
 373 {
 374         *ppv = NULL;
 375         if ( IsEqualCLSID( &IID_IUnknown, piid ) ||
 376              IsEqualCLSID( &IID_IClassFactory, piid ) )
 377         {
 378                 return IClassFactory_Alloc( pclsid, ppv );
 379         }
 380
 381         return CLASS_E_CLASSNOTAVAILABLE;
 382 }
 383
 384 /***********************************************************************
 385  *              DllRegisterServer (QUARTZ.@)
 386  */
 387
 388 HRESULT WINAPI QUARTZ_DllRegisterServer( void )
 389 {
 390         FIXME( "(): stub\n" );
 391         return E_FAIL;
 392 }
 393
 394 /***********************************************************************
 395  *              DllUnregisterServer (QUARTZ.@)
 396  */
 397
 398 HRESULT WINAPI QUARTZ_DllUnregisterServer( void )
 399 {
 400         FIXME( "(): stub\n" );
 401         return E_FAIL;
 402 }
 403
 404 /**************************************************************************/
 405 /**************************************************************************/
 406
 407 /* FIXME - all string should be defined in the resource of quartz. */
 408
 409 static LPCSTR hresult_to_string( HRESULT hr )
 410 {
 411         switch ( hr )
 412         {
 413         #define ENTRY(x)        case x: return (const char*)#x
 414         /* some known codes */
 415         ENTRY(S_OK);
 416         ENTRY(S_FALSE);
 417         ENTRY(E_FAIL);
 418         ENTRY(E_POINTER);
 419         ENTRY(E_NOTIMPL);
 420         ENTRY(E_NOINTERFACE);
 421         ENTRY(E_OUTOFMEMORY);
 422         ENTRY(CLASS_E_CLASSNOTAVAILABLE);
 423         ENTRY(CLASS_E_NOAGGREGATION);
 424
 425         /* vfwmsgs.h */
 426         ENTRY(VFW_S_NO_MORE_ITEMS);
 427         ENTRY(VFW_E_BAD_KEY);
 428         ENTRY(VFW_E_INVALIDMEDIATYPE);
 429         ENTRY(VFW_E_INVALIDSUBTYPE);
 430         ENTRY(VFW_E_NEED_OWNER);
 431         ENTRY(VFW_E_ENUM_OUT_OF_SYNC);
 432         ENTRY(VFW_E_ALREADY_CONNECTED);
 433         ENTRY(VFW_E_FILTER_ACTIVE);
 434         ENTRY(VFW_E_NO_TYPES);
 435         ENTRY(VFW_E_NO_ACCEPTABLE_TYPES);
 436         ENTRY(VFW_E_INVALID_DIRECTION);
 437         ENTRY(VFW_E_NOT_CONNECTED);
 438         ENTRY(VFW_E_NO_ALLOCATOR);
 439         ENTRY(VFW_E_RUNTIME_ERROR);
 440         ENTRY(VFW_E_BUFFER_NOTSET);
 441         ENTRY(VFW_E_BUFFER_OVERFLOW);
 442         ENTRY(VFW_E_BADALIGN);
 443         ENTRY(VFW_E_ALREADY_COMMITTED);
 444         ENTRY(VFW_E_BUFFERS_OUTSTANDING);
 445         ENTRY(VFW_E_NOT_COMMITTED);
 446         ENTRY(VFW_E_SIZENOTSET);
 447         ENTRY(VFW_E_NO_CLOCK);
 448         ENTRY(VFW_E_NO_SINK);
 449         ENTRY(VFW_E_NO_INTERFACE);
 450         ENTRY(VFW_E_NOT_FOUND);
 451         ENTRY(VFW_E_CANNOT_CONNECT);
 452         ENTRY(VFW_E_CANNOT_RENDER);
 453         ENTRY(VFW_E_CHANGING_FORMAT);
 454         ENTRY(VFW_E_NO_COLOR_KEY_SET);
 455         ENTRY(VFW_E_NOT_OVERLAY_CONNECTION);
 456         ENTRY(VFW_E_NOT_SAMPLE_CONNECTION);
 457         ENTRY(VFW_E_PALETTE_SET);
 458         ENTRY(VFW_E_COLOR_KEY_SET);
 459         ENTRY(VFW_E_NO_COLOR_KEY_FOUND);
 460         ENTRY(VFW_E_NO_PALETTE_AVAILABLE);
 461         ENTRY(VFW_E_NO_DISPLAY_PALETTE);
 462         ENTRY(VFW_E_TOO_MANY_COLORS);
 463         ENTRY(VFW_E_STATE_CHANGED);
 464         ENTRY(VFW_E_NOT_STOPPED);
 465         ENTRY(VFW_E_NOT_PAUSED);
 466         ENTRY(VFW_E_NOT_RUNNING);
 467         ENTRY(VFW_E_WRONG_STATE);
 468         ENTRY(VFW_E_START_TIME_AFTER_END);
 469         ENTRY(VFW_E_INVALID_RECT);
 470         ENTRY(VFW_E_TYPE_NOT_ACCEPTED);
 471         ENTRY(VFW_E_SAMPLE_REJECTED);
 472         ENTRY(VFW_E_SAMPLE_REJECTED_EOS);
 473         ENTRY(VFW_S_DUPLICATE_NAME);
 474         ENTRY(VFW_E_DUPLICATE_NAME);
 475         ENTRY(VFW_E_TIMEOUT);
 476         ENTRY(VFW_E_INVALID_FILE_FORMAT);
 477         ENTRY(VFW_E_ENUM_OUT_OF_RANGE);
 478         ENTRY(VFW_E_CIRCULAR_GRAPH);
 479         ENTRY(VFW_E_NOT_ALLOWED_TO_SAVE);
 480         ENTRY(VFW_E_TIME_ALREADY_PASSED);
 481         ENTRY(VFW_E_ALREADY_CANCELLED);
 482         ENTRY(VFW_E_CORRUPT_GRAPH_FILE);
 483         ENTRY(VFW_E_ADVISE_ALREADY_SET);
 484         ENTRY(VFW_S_STATE_INTERMEDIATE);
 485         ENTRY(VFW_E_NO_MODEX_AVAILABLE);
 486         ENTRY(VFW_E_NO_ADVISE_SET);
 487         ENTRY(VFW_E_NO_FULLSCREEN);
 488         ENTRY(VFW_E_IN_FULLSCREEN_MODE);
 489         ENTRY(VFW_E_UNKNOWN_FILE_TYPE);
 490         ENTRY(VFW_E_CANNOT_LOAD_SOURCE_FILTER);
 491         ENTRY(VFW_S_PARTIAL_RENDER);
 492         ENTRY(VFW_E_FILE_TOO_SHORT);
 493         ENTRY(VFW_E_INVALID_FILE_VERSION);
 494         ENTRY(VFW_S_SOME_DATA_IGNORED);
 495         ENTRY(VFW_S_CONNECTIONS_DEFERRED);
 496         ENTRY(VFW_E_INVALID_CLSID);
 497         ENTRY(VFW_E_INVALID_MEDIA_TYPE);
 498         ENTRY(VFW_E_SAMPLE_TIME_NOT_SET);
 499         ENTRY(VFW_S_RESOURCE_NOT_NEEDED);
 500         ENTRY(VFW_E_MEDIA_TIME_NOT_SET);
 501         ENTRY(VFW_E_NO_TIME_FORMAT_SET);
 502         ENTRY(VFW_E_MONO_AUDIO_HW);
 503         ENTRY(VFW_S_MEDIA_TYPE_IGNORED);
 504         ENTRY(VFW_E_NO_DECOMPRESSOR);
 505         ENTRY(VFW_E_NO_AUDIO_HARDWARE);
 506         ENTRY(VFW_S_VIDEO_NOT_RENDERED);
 507         ENTRY(VFW_S_AUDIO_NOT_RENDERED);
 508         ENTRY(VFW_E_RPZA);
 509         ENTRY(VFW_S_RPZA);
 510         ENTRY(VFW_E_PROCESSOR_NOT_SUITABLE);
 511         ENTRY(VFW_E_UNSUPPORTED_AUDIO);
 512         ENTRY(VFW_E_UNSUPPORTED_VIDEO);
 513         ENTRY(VFW_E_MPEG_NOT_CONSTRAINED);
 514         ENTRY(VFW_E_NOT_IN_GRAPH);
 515         ENTRY(VFW_S_ESTIMATED);
 516         ENTRY(VFW_E_NO_TIME_FORMAT);
 517         ENTRY(VFW_E_READ_ONLY);
 518         ENTRY(VFW_S_RESERVED);
 519         ENTRY(VFW_E_BUFFER_UNDERFLOW);
 520         ENTRY(VFW_E_UNSUPPORTED_STREAM);
 521         ENTRY(VFW_E_NO_TRANSPORT);
 522         ENTRY(VFW_S_STREAM_OFF);
 523         ENTRY(VFW_S_CANT_CUE);
 524         ENTRY(VFW_E_BAD_VIDEOCD);
 525         ENTRY(VFW_S_NO_STOP_TIME);
 526         ENTRY(VFW_E_OUT_OF_VIDEO_MEMORY);
 527         ENTRY(VFW_E_VP_NEGOTIATION_FAILED);
 528         ENTRY(VFW_E_DDRAW_CAPS_NOT_SUITABLE);
 529         ENTRY(VFW_E_NO_VP_HARDWARE);
 530         ENTRY(VFW_E_NO_CAPTURE_HARDWARE);
 531         ENTRY(VFW_E_DVD_OPERATION_INHIBITED);
 532         ENTRY(VFW_E_DVD_INVALIDDOMAIN);
 533         ENTRY(VFW_E_DVD_NO_BUTTON);
 534         ENTRY(VFW_E_DVD_GRAPHNOTREADY);
 535         ENTRY(VFW_E_DVD_RENDERFAIL);
 536         ENTRY(VFW_E_DVD_DECNOTENOUGH);
 537         ENTRY(VFW_E_DDRAW_VERSION_NOT_SUITABLE);
 538         ENTRY(VFW_E_COPYPROT_FAILED);
 539         ENTRY(VFW_S_NOPREVIEWPIN);
 540         ENTRY(VFW_E_TIME_EXPIRED);
 541         ENTRY(VFW_S_DVD_NON_ONE_SEQUENTIAL);
 542         ENTRY(VFW_E_DVD_WRONG_SPEED);
 543         ENTRY(VFW_E_DVD_MENU_DOES_NOT_EXIST);
 544         ENTRY(VFW_E_DVD_CMD_CANCELLED);
 545         ENTRY(VFW_E_DVD_STATE_WRONG_VERSION);
 546         ENTRY(VFW_E_DVD_STATE_CORRUPT);
 547         ENTRY(VFW_E_DVD_STATE_WRONG_DISC);
 548         ENTRY(VFW_E_DVD_INCOMPATIBLE_REGION);
 549         ENTRY(VFW_E_DVD_NO_ATTRIBUTES);
 550         ENTRY(VFW_E_DVD_NO_GOUP_PGC);
 551         ENTRY(VFW_E_DVD_LOW_PARENTAL_LEVEL);
 552         ENTRY(VFW_E_DVD_NOT_IN_KARAOKE_MODE);
 553         ENTRY(VFW_S_DVD_CHANNEL_CONTENTS_NOT_AVAILABLE);
 554         ENTRY(VFW_S_DVD_NOT_ACCURATE);
 555         ENTRY(VFW_E_FRAME_STEP_UNSUPPORTED);
 556         ENTRY(VFW_E_DVD_STREAM_DISABLED);
 557         ENTRY(VFW_E_DVD_TITLE_UNKNOWN);
 558         ENTRY(VFW_E_DVD_INVALID_DISC);
 559         ENTRY(VFW_E_DVD_NO_RESUME_INFORMATION);
 560         ENTRY(VFW_E_PIN_ALREADY_BLOCKED_ON_THIS_THREAD);
 561         ENTRY(VFW_E_PIN_ALREADY_BLOCKED);
 562         ENTRY(VFW_E_CERTIFICATION_FAILURE);
 563         #undef  ENTRY
 564         }
 565
 566         return NULL;
 567 }
 568
 569 /***********************************************************************
 570  *      AMGetErrorTextA (quartz.@)
 571  */
 572 DWORD WINAPI AMGetErrorTextA(HRESULT hr, LPSTR pszbuf, DWORD dwBufLen)
 573 {
 574         LPCSTR  lpszRes;
 575         DWORD len;
 576
 577         lpszRes = hresult_to_string( hr );
 578         if ( lpszRes == NULL )
 579                 return 0;
 580         len = (DWORD)(strlen(lpszRes)+1);
 581         if ( len > dwBufLen )
 582                 return 0;
 583
 584         memcpy( pszbuf, lpszRes, len );
 585         return len;
 586 }
 587
 588 /***********************************************************************
 589  *      AMGetErrorTextW (quartz.@)
 590  */
 591 DWORD WINAPI AMGetErrorTextW(HRESULT hr, LPWSTR pwszbuf, DWORD dwBufLen)
 592 {
 593         CHAR    szBuf[MAX_ERROR_TEXT_LEN+1];
 594         DWORD   dwLen;
 595
 596         dwLen = AMGetErrorTextA(hr,szBuf,MAX_ERROR_TEXT_LEN);
 597         if ( dwLen == 0 )
 598                 return 0;
 599         szBuf[dwLen] = 0;
 600
 601         QUARTZ_strncpyAtoW( pwszbuf, szBuf, dwBufLen );
 602
 603         return lstrlenW( pwszbuf );
 604 }