dlls/quartz/filesource.c

   1 /*
   2  * File Source Filter
   3  *
   4  * Copyright 2003 Robert Shearman
   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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #define NONAMELESSUNION
  22 #define NONAMELESSSTRUCT
  23
  24 #include "quartz_private.h"
  25
  26 #include "wine/debug.h"
  27 #include "wine/unicode.h"
  28 #include "pin.h"
  29 #include "uuids.h"
  30 #include "vfwmsgs.h"
  31 #include "winbase.h"
  32 #include "winreg.h"
  33 #include "shlwapi.h"
  34 #include <assert.h>
  35
  36 WINE_DEFAULT_DEBUG_CHANNEL(quartz);
  37
  38 static const WCHAR wszOutputPinName[] = { 'O','u','t','p','u','t',0 };
  39
  40 typedef struct AsyncReader
  41 {
  42     BaseFilter filter;
  43     IFileSourceFilter IFileSourceFilter_iface;
  44     IAMFilterMiscFlags IAMFilterMiscFlags_iface;
  45
  46     IPin * pOutputPin;
  47     LPOLESTR pszFileName;
  48     AM_MEDIA_TYPE * pmt;
  49 } AsyncReader;
  50
  51 static inline AsyncReader *impl_from_BaseFilter(BaseFilter *iface)
  52 {
  53     return CONTAINING_RECORD(iface, AsyncReader, filter);
  54 }
  55
  56 static inline AsyncReader *impl_from_IBaseFilter(IBaseFilter *iface)
  57 {
  58     return CONTAINING_RECORD(iface, AsyncReader, filter.IBaseFilter_iface);
  59 }
  60
  61 static inline AsyncReader *impl_from_IFileSourceFilter(IFileSourceFilter *iface)
  62 {
  63     return CONTAINING_RECORD(iface, AsyncReader, IFileSourceFilter_iface);
  64 }
  65
  66 static inline AsyncReader *impl_from_IAMFilterMiscFlags(IAMFilterMiscFlags *iface)
  67 {
  68     return CONTAINING_RECORD(iface, AsyncReader, IAMFilterMiscFlags_iface);
  69 }
  70
  71 static const IBaseFilterVtbl AsyncReader_Vtbl;
  72 static const IFileSourceFilterVtbl FileSource_Vtbl;
  73 static const IAsyncReaderVtbl FileAsyncReader_Vtbl;
  74 static const IAMFilterMiscFlagsVtbl IAMFilterMiscFlags_Vtbl;
  75
  76 static HRESULT FileAsyncReader_Construct(HANDLE hFile, IBaseFilter * pBaseFilter, LPCRITICAL_SECTION pCritSec, IPin ** ppPin);
  77
  78 static const WCHAR mediatype_name[] = {
  79     'M', 'e', 'd', 'i', 'a', ' ', 'T', 'y', 'p', 'e', 0 };
  80 static const WCHAR subtype_name[] = {
  81     'S', 'u', 'b', 't', 'y', 'p', 'e', 0 };
  82 static const WCHAR source_filter_name[] = {
  83     'S','o','u','r','c','e',' ','F','i','l','t','e','r',0};
  84
  85 static HRESULT process_extensions(HKEY hkeyExtensions, LPCOLESTR pszFileName, GUID * majorType, GUID * minorType, GUID * sourceFilter)
  86 {
  87     WCHAR *extension;
  88     LONG l;
  89     HKEY hsub;
  90     WCHAR keying[39];
  91     DWORD size;
  92
  93     if (!pszFileName)
  94         return E_POINTER;
  95
  96     /* Get the part of the name that matters */
  97     extension = PathFindExtensionW(pszFileName);
  98     if (*extension != '.')
  99         return E_FAIL;
 100
 101     l = RegOpenKeyExW(hkeyExtensions, extension, 0, KEY_READ, &hsub);
 102     if (l)
 103         return E_FAIL;
 104
 105     if (majorType)
 106     {
 107         size = sizeof(keying);
 108         l = RegQueryValueExW(hsub, mediatype_name, NULL, NULL, (LPBYTE)keying, &size);
 109         if (!l)
 110             CLSIDFromString(keying, majorType);
 111     }
 112
 113     if (minorType)
 114     {
 115         size = sizeof(keying);
 116         if (!l)
 117             l = RegQueryValueExW(hsub, subtype_name, NULL, NULL, (LPBYTE)keying, &size);
 118         if (!l)
 119             CLSIDFromString(keying, minorType);
 120     }
 121
 122     if (sourceFilter)
 123     {
 124         size = sizeof(keying);
 125         if (!l)
 126             l = RegQueryValueExW(hsub, source_filter_name, NULL, NULL, (LPBYTE)keying, &size);
 127         if (!l)
 128             CLSIDFromString(keying, sourceFilter);
 129     }
 130
 131     RegCloseKey(hsub);
 132
 133     if (!l)
 134         return S_OK;
 135     return E_FAIL;
 136 }
 137
 138 static unsigned char byte_from_hex_char(WCHAR wHex)
 139 {
 140     switch (tolowerW(wHex))
 141     {
 142     case '0':
 143     case '1':
 144     case '2':
 145     case '3':
 146     case '4':
 147     case '5':
 148     case '6':
 149     case '7':
 150     case '8':
 151     case '9':
 152         return (wHex - '0') & 0xf;
 153     case 'a':
 154     case 'b':
 155     case 'c':
 156     case 'd':
 157     case 'e':
 158     case 'f':
 159         return (wHex - 'a' + 10) & 0xf;
 160     default:
 161         return 0;
 162     }
 163 }
 164
 165 static HRESULT process_pattern_string(LPCWSTR wszPatternString, IAsyncReader * pReader)
 166 {
 167     ULONG ulOffset;
 168     ULONG ulBytes;
 169     BYTE * pbMask;
 170     BYTE * pbValue;
 171     BYTE * pbFile;
 172     HRESULT hr = S_OK;
 173     ULONG strpos;
 174
 175     TRACE("\t\tPattern string: %s\n", debugstr_w(wszPatternString));
 176
 177     /* format: "offset, bytestocompare, mask, value" */
 178
 179     ulOffset = strtolW(wszPatternString, NULL, 10);
 180
 181     if (!(wszPatternString = strchrW(wszPatternString, ',')))
 182         return E_INVALIDARG;
 183
 184     wszPatternString++; /* skip ',' */
 185
 186     ulBytes = strtolW(wszPatternString, NULL, 10);
 187
 188     pbMask = HeapAlloc(GetProcessHeap(), 0, ulBytes);
 189     pbValue = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, ulBytes);
 190     pbFile = HeapAlloc(GetProcessHeap(), 0, ulBytes);
 191
 192     /* default mask is match everything */
 193     memset(pbMask, 0xFF, ulBytes);
 194
 195     if (!(wszPatternString = strchrW(wszPatternString, ',')))
 196         hr = E_INVALIDARG;
 197
 198     if (hr == S_OK)
 199     {
 200         wszPatternString++; /* skip ',' */
 201         while (!isxdigitW(*wszPatternString) && (*wszPatternString != ',')) wszPatternString++;
 202
 203         for (strpos = 0; isxdigitW(*wszPatternString) && (strpos/2 < ulBytes); wszPatternString++, strpos++)
 204         {
 205             if ((strpos % 2) == 1) /* odd numbered position */
 206                 pbMask[strpos / 2] |= byte_from_hex_char(*wszPatternString);
 207             else
 208                 pbMask[strpos / 2] = byte_from_hex_char(*wszPatternString) << 4;
 209         }
 210
 211         if (!(wszPatternString = strchrW(wszPatternString, ',')))
 212             hr = E_INVALIDARG;
 213         else
 214             wszPatternString++; /* skip ',' */
 215     }
 216
 217     if (hr == S_OK)
 218     {
 219         for ( ; !isxdigitW(*wszPatternString) && (*wszPatternString != ','); wszPatternString++)
 220             ;
 221
 222         for (strpos = 0; isxdigitW(*wszPatternString) && (strpos/2 < ulBytes); wszPatternString++, strpos++)
 223         {
 224             if ((strpos % 2) == 1) /* odd numbered position */
 225                 pbValue[strpos / 2] |= byte_from_hex_char(*wszPatternString);
 226             else
 227                 pbValue[strpos / 2] = byte_from_hex_char(*wszPatternString) << 4;
 228         }
 229     }
 230
 231     if (hr == S_OK)
 232         hr = IAsyncReader_SyncRead(pReader, ulOffset, ulBytes, pbFile);
 233
 234     if (hr == S_OK)
 235     {
 236         ULONG i;
 237         for (i = 0; i < ulBytes; i++)
 238             if ((pbFile[i] & pbMask[i]) != pbValue[i])
 239             {
 240                 hr = S_FALSE;
 241                 break;
 242             }
 243     }
 244
 245     HeapFree(GetProcessHeap(), 0, pbMask);
 246     HeapFree(GetProcessHeap(), 0, pbValue);
 247     HeapFree(GetProcessHeap(), 0, pbFile);
 248
 249     /* if we encountered no errors with this string, and there is a following tuple, then we
 250      * have to match that as well to succeed */
 251     if ((hr == S_OK) && (wszPatternString = strchrW(wszPatternString, ',')))
 252         return process_pattern_string(wszPatternString + 1, pReader);
 253     else
 254         return hr;
 255 }
 256
 257 HRESULT GetClassMediaFile(IAsyncReader * pReader, LPCOLESTR pszFileName, GUID * majorType, GUID * minorType, GUID * sourceFilter)
 258 {
 259     HKEY hkeyMediaType = NULL;
 260     LONG lRet;
 261     HRESULT hr = S_OK;
 262     BOOL bFound = FALSE;
 263     static const WCHAR wszMediaType[] = {'M','e','d','i','a',' ','T','y','p','e',0};
 264
 265     TRACE("(%p, %s, %p, %p)\n", pReader, debugstr_w(pszFileName), majorType, minorType);
 266
 267     if(majorType)
 268         *majorType = GUID_NULL;
 269     if(minorType)
 270         *minorType = GUID_NULL;
 271     if(sourceFilter)
 272         *sourceFilter = GUID_NULL;
 273
 274     lRet = RegOpenKeyExW(HKEY_CLASSES_ROOT, wszMediaType, 0, KEY_READ, &hkeyMediaType);
 275     hr = HRESULT_FROM_WIN32(lRet);
 276
 277     if (SUCCEEDED(hr))
 278     {
 279         DWORD indexMajor;
 280
 281         for (indexMajor = 0; !bFound; indexMajor++)
 282         {
 283             HKEY hkeyMajor;
 284             WCHAR wszMajorKeyName[CHARS_IN_GUID];
 285             DWORD dwKeyNameLength = sizeof(wszMajorKeyName) / sizeof(wszMajorKeyName[0]);
 286             static const WCHAR wszExtensions[] = {'E','x','t','e','n','s','i','o','n','s',0};
 287
 288             if (RegEnumKeyExW(hkeyMediaType, indexMajor, wszMajorKeyName, &dwKeyNameLength, NULL, NULL, NULL, NULL) != ERROR_SUCCESS)
 289                 break;
 290             if (RegOpenKeyExW(hkeyMediaType, wszMajorKeyName, 0, KEY_READ, &hkeyMajor) != ERROR_SUCCESS)
 291                 break;
 292             TRACE("%s\n", debugstr_w(wszMajorKeyName));
 293             if (!strcmpW(wszExtensions, wszMajorKeyName))
 294             {
 295                 if (process_extensions(hkeyMajor, pszFileName, majorType, minorType, sourceFilter) == S_OK)
 296                     bFound = TRUE;
 297             }
 298             /* We need a reader interface to check bytes */
 299             else if (pReader)
 300             {
 301                 DWORD indexMinor;
 302
 303                 for (indexMinor = 0; !bFound; indexMinor++)
 304                 {
 305                     HKEY hkeyMinor;
 306                     WCHAR wszMinorKeyName[CHARS_IN_GUID];
 307                     DWORD dwMinorKeyNameLen = sizeof(wszMinorKeyName) / sizeof(wszMinorKeyName[0]);
 308                     WCHAR wszSourceFilterKeyName[CHARS_IN_GUID];
 309                     DWORD dwSourceFilterKeyNameLen = sizeof(wszSourceFilterKeyName);
 310                     DWORD maxValueLen;
 311                     DWORD indexValue;
 312
 313                     if (RegEnumKeyExW(hkeyMajor, indexMinor, wszMinorKeyName, &dwMinorKeyNameLen, NULL, NULL, NULL, NULL) != ERROR_SUCCESS)
 314                         break;
 315
 316                     if (RegOpenKeyExW(hkeyMajor, wszMinorKeyName, 0, KEY_READ, &hkeyMinor) != ERROR_SUCCESS)
 317                         break;
 318
 319                     TRACE("\t%s\n", debugstr_w(wszMinorKeyName));
 320
 321                     if (RegQueryInfoKeyW(hkeyMinor, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, &maxValueLen, NULL, NULL) != ERROR_SUCCESS)
 322                         break;
 323
 324                     for (indexValue = 0; !bFound; indexValue++)
 325                     {
 326                         DWORD dwType;
 327                         WCHAR wszValueName[14]; /* longest name we should encounter will be "Source Filter" */
 328                         LPWSTR wszPatternString = HeapAlloc(GetProcessHeap(), 0, maxValueLen);
 329                         DWORD dwValueNameLen = sizeof(wszValueName) / sizeof(wszValueName[0]); /* remember this is in chars */
 330                         DWORD dwDataLen = maxValueLen; /* remember this is in bytes */
 331
 332                         if (RegEnumValueW(hkeyMinor, indexValue, wszValueName, &dwValueNameLen, NULL, &dwType, (LPBYTE)wszPatternString, &dwDataLen) != ERROR_SUCCESS)
 333                         {
 334                             HeapFree(GetProcessHeap(), 0, wszPatternString);
 335                             break;
 336                         }
 337
 338                         if (strcmpW(wszValueName, source_filter_name)==0) {
 339                             HeapFree(GetProcessHeap(), 0, wszPatternString);
 340                             continue;
 341                         }
 342
 343                         /* if it is not the source filter value */
 344                         if (process_pattern_string(wszPatternString, pReader) == S_OK)
 345                         {
 346                             HeapFree(GetProcessHeap(), 0, wszPatternString);
 347                             if (majorType && FAILED(CLSIDFromString(wszMajorKeyName, majorType)))
 348                                 break;
 349                             if (minorType && FAILED(CLSIDFromString(wszMinorKeyName, minorType)))
 350                                 break;
 351                             if (sourceFilter)
 352                             {
 353                                 /* Look up the source filter key */
 354                                 if (RegQueryValueExW(hkeyMinor, source_filter_name, NULL, NULL, (LPBYTE)wszSourceFilterKeyName, &dwSourceFilterKeyNameLen))
 355                                     break;
 356                                 if (FAILED(CLSIDFromString(wszSourceFilterKeyName, sourceFilter)))
 357                                     break;
 358                             }
 359                             bFound = TRUE;
 360                         } else
 361                             HeapFree(GetProcessHeap(), 0, wszPatternString);
 362                     }
 363                     CloseHandle(hkeyMinor);
 364                 }
 365             }
 366             CloseHandle(hkeyMajor);
 367         }
 368     }
 369     CloseHandle(hkeyMediaType);
 370
 371     if (SUCCEEDED(hr) && !bFound)
 372     {
 373         ERR("Media class not found\n");
 374         hr = E_FAIL;
 375     }
 376     else if (bFound)
 377     {
 378         TRACE("Found file's class:\n");
 379         if(majorType)
 380                 TRACE("\tmajor = %s\n", qzdebugstr_guid(majorType));
 381         if(minorType)
 382                 TRACE("\tsubtype = %s\n", qzdebugstr_guid(minorType));
 383         if(sourceFilter)
 384                 TRACE("\tsource filter = %s\n", qzdebugstr_guid(sourceFilter));
 385     }
 386
 387     return hr;
 388 }
 389
 390 static IPin* WINAPI AsyncReader_GetPin(BaseFilter *iface, int pos)
 391 {
 392     AsyncReader *This = impl_from_BaseFilter(iface);
 393
 394     if (pos >= 1 || !This->pOutputPin)
 395         return NULL;
 396
 397     IPin_AddRef(This->pOutputPin);
 398     return This->pOutputPin;
 399 }
 400
 401 static LONG WINAPI AsyncReader_GetPinCount(BaseFilter *iface)
 402 {
 403     AsyncReader *This = impl_from_BaseFilter(iface);
 404
 405     if (!This->pOutputPin)
 406         return 0;
 407     else
 408         return 1;
 409 }
 410
 411 static const BaseFilterFuncTable BaseFuncTable = {
 412     AsyncReader_GetPin,
 413     AsyncReader_GetPinCount
 414 };
 415
 416 HRESULT AsyncReader_create(IUnknown * pUnkOuter, LPVOID * ppv)
 417 {
 418     AsyncReader *pAsyncRead;
 419
 420     if( pUnkOuter )
 421         return CLASS_E_NOAGGREGATION;
 422
 423     pAsyncRead = CoTaskMemAlloc(sizeof(AsyncReader));
 424
 425     if (!pAsyncRead)
 426         return E_OUTOFMEMORY;
 427
 428     BaseFilter_Init(&pAsyncRead->filter, &AsyncReader_Vtbl, &CLSID_AsyncReader, (DWORD_PTR)(__FILE__ ": AsyncReader.csFilter"), &BaseFuncTable);
 429
 430     pAsyncRead->IFileSourceFilter_iface.lpVtbl = &FileSource_Vtbl;
 431     pAsyncRead->IAMFilterMiscFlags_iface.lpVtbl = &IAMFilterMiscFlags_Vtbl;
 432     pAsyncRead->pOutputPin = NULL;
 433
 434     pAsyncRead->pszFileName = NULL;
 435     pAsyncRead->pmt = NULL;
 436
 437     *ppv = pAsyncRead;
 438
 439     TRACE("-- created at %p\n", pAsyncRead);
 440
 441     return S_OK;
 442 }
 443
 444 /** IUnknown methods **/
 445
 446 static HRESULT WINAPI AsyncReader_QueryInterface(IBaseFilter * iface, REFIID riid, LPVOID * ppv)
 447 {
 448     AsyncReader *This = impl_from_IBaseFilter(iface);
 449
 450     TRACE("(%s, %p)\n", qzdebugstr_guid(riid), ppv);
 451
 452     *ppv = NULL;
 453
 454     if (IsEqualIID(riid, &IID_IUnknown))
 455         *ppv = &This->filter.IBaseFilter_iface;
 456     else if (IsEqualIID(riid, &IID_IPersist))
 457         *ppv = &This->filter.IBaseFilter_iface;
 458     else if (IsEqualIID(riid, &IID_IMediaFilter))
 459         *ppv = &This->filter.IBaseFilter_iface;
 460     else if (IsEqualIID(riid, &IID_IBaseFilter))
 461         *ppv = &This->filter.IBaseFilter_iface;
 462     else if (IsEqualIID(riid, &IID_IFileSourceFilter))
 463         *ppv = &This->IFileSourceFilter_iface;
 464     else if (IsEqualIID(riid, &IID_IAMFilterMiscFlags))
 465         *ppv = &This->IAMFilterMiscFlags_iface;
 466
 467     if (*ppv)
 468     {
 469         IUnknown_AddRef((IUnknown *)(*ppv));
 470         return S_OK;
 471     }
 472
 473     if (!IsEqualIID(riid, &IID_IPin) && !IsEqualIID(riid, &IID_IMediaSeeking) &&
 474         !IsEqualIID(riid, &IID_IVideoWindow) && !IsEqualIID(riid, &IID_IBasicAudio))
 475         FIXME("No interface for %s!\n", qzdebugstr_guid(riid));
 476
 477     return E_NOINTERFACE;
 478 }
 479
 480 static ULONG WINAPI AsyncReader_Release(IBaseFilter * iface)
 481 {
 482     AsyncReader *This = impl_from_IBaseFilter(iface);
 483     ULONG refCount = InterlockedDecrement(&This->filter.refCount);
 484
 485     TRACE("(%p)->() Release from %d\n", This, refCount + 1);
 486
 487     if (!refCount)
 488     {
 489         if (This->pOutputPin)
 490         {
 491             IPin *pConnectedTo;
 492             if(SUCCEEDED(IPin_ConnectedTo(This->pOutputPin, &pConnectedTo)))
 493             {
 494                 IPin_Disconnect(pConnectedTo);
 495                 IPin_Release(pConnectedTo);
 496             }
 497             IPin_Disconnect(This->pOutputPin);
 498             IPin_Release(This->pOutputPin);
 499         }
 500         CoTaskMemFree(This->pszFileName);
 501         if (This->pmt)
 502             FreeMediaType(This->pmt);
 503         BaseFilter_Destroy(&This->filter);
 504         CoTaskMemFree(This);
 505         return 0;
 506     }
 507     else
 508         return refCount;
 509 }
 510
 511 /** IMediaFilter methods **/
 512
 513 static HRESULT WINAPI AsyncReader_Stop(IBaseFilter * iface)
 514 {
 515     AsyncReader *This = impl_from_IBaseFilter(iface);
 516
 517     TRACE("()\n");
 518
 519     This->filter.state = State_Stopped;
 520
 521     return S_OK;
 522 }
 523
 524 static HRESULT WINAPI AsyncReader_Pause(IBaseFilter * iface)
 525 {
 526     AsyncReader *This = impl_from_IBaseFilter(iface);
 527
 528     TRACE("()\n");
 529
 530     This->filter.state = State_Paused;
 531
 532     return S_OK;
 533 }
 534
 535 static HRESULT WINAPI AsyncReader_Run(IBaseFilter * iface, REFERENCE_TIME tStart)
 536 {
 537     AsyncReader *This = impl_from_IBaseFilter(iface);
 538
 539     TRACE("(%x%08x)\n", (ULONG)(tStart >> 32), (ULONG)tStart);
 540
 541     This->filter.state = State_Running;
 542
 543     return S_OK;
 544 }
 545
 546 /** IBaseFilter methods **/
 547
 548 static HRESULT WINAPI AsyncReader_FindPin(IBaseFilter * iface, LPCWSTR Id, IPin **ppPin)
 549 {
 550     AsyncReader *This = impl_from_IBaseFilter(iface);
 551     TRACE("(%s, %p)\n", debugstr_w(Id), ppPin);
 552
 553     if (!Id || !ppPin)
 554         return E_POINTER;
 555
 556     if (strcmpW(Id, wszOutputPinName))
 557     {
 558         *ppPin = NULL;
 559         return VFW_E_NOT_FOUND;
 560     }
 561
 562     *ppPin = This->pOutputPin;
 563     IPin_AddRef(*ppPin);
 564     return S_OK;
 565 }
 566
 567 static const IBaseFilterVtbl AsyncReader_Vtbl =
 568 {
 569     AsyncReader_QueryInterface,
 570     BaseFilterImpl_AddRef,
 571     AsyncReader_Release,
 572     BaseFilterImpl_GetClassID,
 573     AsyncReader_Stop,
 574     AsyncReader_Pause,
 575     AsyncReader_Run,
 576     BaseFilterImpl_GetState,
 577     BaseFilterImpl_SetSyncSource,
 578     BaseFilterImpl_GetSyncSource,
 579     BaseFilterImpl_EnumPins,
 580     AsyncReader_FindPin,
 581     BaseFilterImpl_QueryFilterInfo,
 582     BaseFilterImpl_JoinFilterGraph,
 583     BaseFilterImpl_QueryVendorInfo
 584 };
 585
 586 static HRESULT WINAPI FileSource_QueryInterface(IFileSourceFilter * iface, REFIID riid, LPVOID * ppv)
 587 {
 588     AsyncReader *This = impl_from_IFileSourceFilter(iface);
 589
 590     return IBaseFilter_QueryInterface(&This->filter.IBaseFilter_iface, riid, ppv);
 591 }
 592
 593 static ULONG WINAPI FileSource_AddRef(IFileSourceFilter * iface)
 594 {
 595     AsyncReader *This = impl_from_IFileSourceFilter(iface);
 596
 597     return IBaseFilter_AddRef(&This->filter.IBaseFilter_iface);
 598 }
 599
 600 static ULONG WINAPI FileSource_Release(IFileSourceFilter * iface)
 601 {
 602     AsyncReader *This = impl_from_IFileSourceFilter(iface);
 603
 604     return IBaseFilter_Release(&This->filter.IBaseFilter_iface);
 605 }
 606
 607 static HRESULT WINAPI FileSource_Load(IFileSourceFilter * iface, LPCOLESTR pszFileName, const AM_MEDIA_TYPE * pmt)
 608 {
 609     HRESULT hr;
 610     HANDLE hFile;
 611     IAsyncReader * pReader = NULL;
 612     AsyncReader *This = impl_from_IFileSourceFilter(iface);
 613
 614     TRACE("(%s, %p)\n", debugstr_w(pszFileName), pmt);
 615
 616     /* open file */
 617     /* FIXME: check the sharing values that native uses */
 618     hFile = CreateFileW(pszFileName, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_FLAG_OVERLAPPED, NULL);
 619
 620     if (hFile == INVALID_HANDLE_VALUE)
 621     {
 622         return HRESULT_FROM_WIN32(GetLastError());
 623     }
 624
 625     /* create pin */
 626     hr = FileAsyncReader_Construct(hFile, &This->filter.IBaseFilter_iface, &This->filter.csFilter, &This->pOutputPin);
 627     BaseFilterImpl_IncrementPinVersion(&This->filter);
 628
 629     if (SUCCEEDED(hr))
 630         hr = IPin_QueryInterface(This->pOutputPin, &IID_IAsyncReader, (LPVOID *)&pReader);
 631
 632     /* store file name & media type */
 633     if (SUCCEEDED(hr))
 634     {
 635         CoTaskMemFree(This->pszFileName);
 636         if (This->pmt)
 637             FreeMediaType(This->pmt);
 638
 639         This->pszFileName = CoTaskMemAlloc((strlenW(pszFileName) + 1) * sizeof(WCHAR));
 640         strcpyW(This->pszFileName, pszFileName);
 641
 642         This->pmt = CoTaskMemAlloc(sizeof(AM_MEDIA_TYPE));
 643         if (!pmt)
 644         {
 645             This->pmt->bFixedSizeSamples = TRUE;
 646             This->pmt->bTemporalCompression = FALSE;
 647             This->pmt->cbFormat = 0;
 648             This->pmt->pbFormat = NULL;
 649             This->pmt->pUnk = NULL;
 650             This->pmt->lSampleSize = 0;
 651             This->pmt->formattype = FORMAT_None;
 652             hr = GetClassMediaFile(pReader, pszFileName, &This->pmt->majortype, &This->pmt->subtype, NULL);
 653             if (FAILED(hr))
 654             {
 655                 CoTaskMemFree(This->pmt);
 656                 This->pmt = NULL;
 657             }
 658         }
 659         else
 660             CopyMediaType(This->pmt, pmt);
 661     }
 662
 663     if (pReader)
 664         IAsyncReader_Release(pReader);
 665
 666     if (FAILED(hr))
 667     {
 668         if (This->pOutputPin)
 669         {
 670             IPin_Release(This->pOutputPin);
 671             This->pOutputPin = NULL;
 672         }
 673
 674         CoTaskMemFree(This->pszFileName);
 675         if (This->pmt)
 676             FreeMediaType(This->pmt);
 677         This->pszFileName = NULL;
 678         This->pmt = NULL;
 679
 680         CloseHandle(hFile);
 681     }
 682
 683     /* FIXME: check return codes */
 684     return hr;
 685 }
 686
 687 static HRESULT WINAPI FileSource_GetCurFile(IFileSourceFilter * iface, LPOLESTR * ppszFileName, AM_MEDIA_TYPE * pmt)
 688 {
 689     AsyncReader *This = impl_from_IFileSourceFilter(iface);
 690
 691     TRACE("(%p, %p)\n", ppszFileName, pmt);
 692
 693     if (!ppszFileName)
 694         return E_POINTER;
 695
 696     /* copy file name & media type if available, otherwise clear the outputs */
 697     if (This->pszFileName)
 698     {
 699         *ppszFileName = CoTaskMemAlloc((strlenW(This->pszFileName) + 1) * sizeof(WCHAR));
 700         strcpyW(*ppszFileName, This->pszFileName);
 701     }
 702     else
 703         *ppszFileName = NULL;
 704
 705     if (pmt)
 706     {
 707         if (This->pmt)
 708             CopyMediaType(pmt, This->pmt);
 709         else
 710             ZeroMemory(pmt, sizeof(*pmt));
 711     }
 712
 713     return S_OK;
 714 }
 715
 716 static const IFileSourceFilterVtbl FileSource_Vtbl =
 717 {
 718     FileSource_QueryInterface,
 719     FileSource_AddRef,
 720     FileSource_Release,
 721     FileSource_Load,
 722     FileSource_GetCurFile
 723 };
 724
 725
 726 /* the dwUserData passed back to user */
 727 typedef struct DATAREQUEST
 728 {
 729     IMediaSample * pSample; /* sample passed to us by user */
 730     DWORD_PTR dwUserData; /* user data passed to us */
 731     OVERLAPPED ovl; /* our overlapped structure */
 732 } DATAREQUEST;
 733
 734 typedef struct FileAsyncReader
 735 {
 736     BaseOutputPin pin;
 737     IAsyncReader IAsyncReader_iface;
 738
 739     ALLOCATOR_PROPERTIES allocProps;
 740     HANDLE hFile;
 741     BOOL bFlushing;
 742     /* Why would you need more? Every sample has its own handle */
 743     LONG queued_number;
 744     LONG samples;
 745     LONG oldest_sample;
 746     CRITICAL_SECTION csList; /* critical section to prevent concurrency issues */
 747     DATAREQUEST *sample_list;
 748
 749     /* Have a handle for every sample, and then one more as flushing handle */
 750     HANDLE *handle_list;
 751 } FileAsyncReader;
 752
 753 static inline FileAsyncReader *impl_from_IPin(IPin *iface)
 754 {
 755     return CONTAINING_RECORD(iface, FileAsyncReader, pin.pin.IPin_iface);
 756 }
 757
 758 static inline FileAsyncReader *impl_from_BasePin(BasePin *iface)
 759 {
 760     return CONTAINING_RECORD(iface, FileAsyncReader, pin.pin);
 761 }
 762
 763 static inline FileAsyncReader *impl_from_BaseOutputPin(BaseOutputPin *iface)
 764 {
 765     return CONTAINING_RECORD(iface, FileAsyncReader, pin);
 766 }
 767
 768 static inline BaseOutputPin *impl_BaseOututPin_from_BasePin(BasePin *iface)
 769 {
 770     return CONTAINING_RECORD(iface, BaseOutputPin, pin);
 771 }
 772
 773 static inline FileAsyncReader *impl_from_IAsyncReader(IAsyncReader *iface)
 774 {
 775     return CONTAINING_RECORD(iface, FileAsyncReader, IAsyncReader_iface);
 776 }
 777
 778 static HRESULT WINAPI FileAsyncReaderPin_QueryAccept(IPin *iface, const AM_MEDIA_TYPE *pmt)
 779 {
 780     FileAsyncReader *This = impl_from_IPin(iface);
 781     AM_MEDIA_TYPE *pmt_filter = impl_from_IBaseFilter(This->pin.pin.pinInfo.pFilter)->pmt;
 782
 783     FIXME("(%p, %p)\n", iface, pmt);
 784
 785     if (IsEqualGUID(&pmt->majortype, &pmt_filter->majortype) &&
 786         IsEqualGUID(&pmt->subtype, &pmt_filter->subtype) &&
 787         IsEqualGUID(&pmt->formattype, &FORMAT_None))
 788         return S_OK;
 789
 790     return S_FALSE;
 791 }
 792
 793 static HRESULT WINAPI FileAsyncReaderPin_GetMediaType(BasePin *iface, int iPosition, AM_MEDIA_TYPE *pmt)
 794 {
 795     FileAsyncReader *This = impl_from_BasePin(iface);
 796     if (iPosition < 0)
 797         return E_INVALIDARG;
 798     if (iPosition > 0)
 799         return VFW_S_NO_MORE_ITEMS;
 800     CopyMediaType(pmt, impl_from_IBaseFilter(This->pin.pin.pinInfo.pFilter)->pmt);
 801     return S_OK;
 802 }
 803
 804 /* overridden pin functions */
 805
 806 static HRESULT WINAPI FileAsyncReaderPin_QueryInterface(IPin * iface, REFIID riid, LPVOID * ppv)
 807 {
 808     FileAsyncReader *This = impl_from_IPin(iface);
 809     TRACE("(%s, %p)\n", qzdebugstr_guid(riid), ppv);
 810
 811     *ppv = NULL;
 812
 813     if (IsEqualIID(riid, &IID_IUnknown) || IsEqualIID(riid, &IID_IPin))
 814         *ppv = &This->pin.pin.IPin_iface;
 815     else if (IsEqualIID(riid, &IID_IAsyncReader))
 816         *ppv = &This->IAsyncReader_iface;
 817
 818     if (*ppv)
 819     {
 820         IUnknown_AddRef((IUnknown *)*ppv);
 821         return S_OK;
 822     }
 823
 824     if (!IsEqualIID(riid, &IID_IMediaSeeking))
 825         FIXME("No interface for %s!\n", qzdebugstr_guid(riid));
 826
 827     return E_NOINTERFACE;
 828 }
 829
 830 static ULONG WINAPI FileAsyncReaderPin_Release(IPin * iface)
 831 {
 832     FileAsyncReader *This = impl_from_IPin(iface);
 833     ULONG refCount = InterlockedDecrement(&This->pin.pin.refCount);
 834     int x;
 835
 836     TRACE("(%p)->() Release from %d\n", This, refCount + 1);
 837
 838     if (!refCount)
 839     {
 840         CoTaskMemFree(This->sample_list);
 841         if (This->handle_list)
 842         {
 843             for (x = 0; x <= This->samples; ++x)
 844                 CloseHandle(This->handle_list[x]);
 845             CoTaskMemFree(This->handle_list);
 846         }
 847         CloseHandle(This->hFile);
 848         This->csList.DebugInfo->Spare[0] = 0;
 849         DeleteCriticalSection(&This->csList);
 850         BaseOutputPin_Destroy(&This->pin);
 851         return 0;
 852     }
 853     return refCount;
 854 }
 855
 856 static const IPinVtbl FileAsyncReaderPin_Vtbl =
 857 {
 858     FileAsyncReaderPin_QueryInterface,
 859     BasePinImpl_AddRef,
 860     FileAsyncReaderPin_Release,
 861     BaseOutputPinImpl_Connect,
 862     BaseOutputPinImpl_ReceiveConnection,
 863     BasePinImpl_Disconnect,
 864     BasePinImpl_ConnectedTo,
 865     BasePinImpl_ConnectionMediaType,
 866     BasePinImpl_QueryPinInfo,
 867     BasePinImpl_QueryDirection,
 868     BasePinImpl_QueryId,
 869     FileAsyncReaderPin_QueryAccept,
 870     BasePinImpl_EnumMediaTypes,
 871     BasePinImpl_QueryInternalConnections,
 872     BaseOutputPinImpl_EndOfStream,
 873     BaseOutputPinImpl_BeginFlush,
 874     BaseOutputPinImpl_EndFlush,
 875     BasePinImpl_NewSegment
 876 };
 877
 878 /* Function called as a helper to IPin_Connect */
 879 /* specific AM_MEDIA_TYPE - it cannot be NULL */
 880 /* this differs from standard OutputPin_AttemptConnection only in that it
 881  * doesn't need the IMemInputPin interface on the receiving pin */
 882 static HRESULT WINAPI FileAsyncReaderPin_AttemptConnection(BasePin * iface, IPin * pReceivePin, const AM_MEDIA_TYPE * pmt)
 883 {
 884     BaseOutputPin *This = impl_BaseOututPin_from_BasePin(iface);
 885     HRESULT hr;
 886
 887     TRACE("(%p, %p)\n", pReceivePin, pmt);
 888     dump_AM_MEDIA_TYPE(pmt);
 889
 890     /* FIXME: call queryacceptproc */
 891
 892     This->pin.pConnectedTo = pReceivePin;
 893     IPin_AddRef(pReceivePin);
 894     CopyMediaType(&This->pin.mtCurrent, pmt);
 895
 896     hr = IPin_ReceiveConnection(pReceivePin, &iface->IPin_iface, pmt);
 897
 898     if (FAILED(hr))
 899     {
 900         IPin_Release(This->pin.pConnectedTo);
 901         This->pin.pConnectedTo = NULL;
 902         FreeMediaType(&This->pin.mtCurrent);
 903     }
 904
 905     TRACE(" -- %x\n", hr);
 906     return hr;
 907 }
 908
 909 static HRESULT WINAPI FileAsyncReaderPin_DecideBufferSize(BaseOutputPin *iface, IMemAllocator *pAlloc, ALLOCATOR_PROPERTIES *ppropInputRequest)
 910 {
 911     FileAsyncReader *This = impl_from_BaseOutputPin(iface);
 912     ALLOCATOR_PROPERTIES actual;
 913
 914     if (ppropInputRequest->cbAlign && ppropInputRequest->cbAlign != This->allocProps.cbAlign)
 915         FIXME("Requested Buffer cbAlign mismatch %i,%i\n",This->allocProps.cbAlign, ppropInputRequest->cbAlign);
 916     if (ppropInputRequest->cbPrefix)
 917         FIXME("Requested Buffer cbPrefix mismatch %i,%i\n",This->allocProps.cbPrefix, ppropInputRequest->cbPrefix);
 918     if (ppropInputRequest->cbBuffer)
 919         FIXME("Requested Buffer cbBuffer mismatch %i,%i\n",This->allocProps.cbBuffer, ppropInputRequest->cbBuffer);
 920     if (ppropInputRequest->cBuffers)
 921         FIXME("Requested Buffer cBuffers mismatch %i,%i\n",This->allocProps.cBuffers, ppropInputRequest->cBuffers);
 922
 923     return IMemAllocator_SetProperties(pAlloc, &This->allocProps, &actual);
 924 }
 925
 926 static const BaseOutputPinFuncTable output_BaseOutputFuncTable = {
 927     {
 928         NULL,
 929         FileAsyncReaderPin_AttemptConnection,
 930         BasePinImpl_GetMediaTypeVersion,
 931         FileAsyncReaderPin_GetMediaType
 932     },
 933     FileAsyncReaderPin_DecideBufferSize,
 934     BaseOutputPinImpl_DecideAllocator,
 935     BaseOutputPinImpl_BreakConnect
 936 };
 937
 938 static HRESULT FileAsyncReader_Construct(HANDLE hFile, IBaseFilter * pBaseFilter, LPCRITICAL_SECTION pCritSec, IPin ** ppPin)
 939 {
 940     PIN_INFO piOutput;
 941     HRESULT hr;
 942
 943     *ppPin = NULL;
 944     piOutput.dir = PINDIR_OUTPUT;
 945     piOutput.pFilter = pBaseFilter;
 946     strcpyW(piOutput.achName, wszOutputPinName);
 947     hr = BaseOutputPin_Construct(&FileAsyncReaderPin_Vtbl, sizeof(FileAsyncReader), &piOutput, &output_BaseOutputFuncTable, pCritSec, ppPin);
 948
 949     if (SUCCEEDED(hr))
 950     {
 951         FileAsyncReader *pPinImpl =  (FileAsyncReader *)*ppPin;
 952         pPinImpl->IAsyncReader_iface.lpVtbl = &FileAsyncReader_Vtbl;
 953         pPinImpl->hFile = hFile;
 954         pPinImpl->bFlushing = FALSE;
 955         pPinImpl->sample_list = NULL;
 956         pPinImpl->handle_list = NULL;
 957         pPinImpl->queued_number = 0;
 958         InitializeCriticalSection(&pPinImpl->csList);
 959         pPinImpl->csList.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": FileAsyncReader.csList");
 960     }
 961     return hr;
 962 }
 963
 964 /* IAsyncReader */
 965
 966 static HRESULT WINAPI FileAsyncReader_QueryInterface(IAsyncReader * iface, REFIID riid, LPVOID * ppv)
 967 {
 968     FileAsyncReader *This = impl_from_IAsyncReader(iface);
 969
 970     return IPin_QueryInterface(&This->pin.pin.IPin_iface, riid, ppv);
 971 }
 972
 973 static ULONG WINAPI FileAsyncReader_AddRef(IAsyncReader * iface)
 974 {
 975     FileAsyncReader *This = impl_from_IAsyncReader(iface);
 976
 977     return IPin_AddRef(&This->pin.pin.IPin_iface);
 978 }
 979
 980 static ULONG WINAPI FileAsyncReader_Release(IAsyncReader * iface)
 981 {
 982     FileAsyncReader *This = impl_from_IAsyncReader(iface);
 983
 984     return IPin_Release(&This->pin.pin.IPin_iface);
 985 }
 986
 987 #define DEF_ALIGNMENT 1
 988
 989 static HRESULT WINAPI FileAsyncReader_RequestAllocator(IAsyncReader * iface, IMemAllocator * pPreferred, ALLOCATOR_PROPERTIES * pProps, IMemAllocator ** ppActual)
 990 {
 991     FileAsyncReader *This = impl_from_IAsyncReader(iface);
 992
 993     HRESULT hr = S_OK;
 994
 995     TRACE("(%p, %p, %p)\n", pPreferred, pProps, ppActual);
 996
 997     if (!pProps->cbAlign || (pProps->cbAlign % DEF_ALIGNMENT) != 0)
 998         pProps->cbAlign = DEF_ALIGNMENT;
 999
1000     if (pPreferred)
1001     {
1002         hr = IMemAllocator_SetProperties(pPreferred, pProps, pProps);
1003         /* FIXME: check we are still aligned */
1004         if (SUCCEEDED(hr))
1005         {
1006             IMemAllocator_AddRef(pPreferred);
1007             *ppActual = pPreferred;
1008             TRACE("FileAsyncReader_RequestAllocator -- %x\n", hr);
1009             goto done;
1010         }
1011     }
1012
1013     pPreferred = NULL;
1014
1015     hr = CoCreateInstance(&CLSID_MemoryAllocator, NULL, CLSCTX_INPROC, &IID_IMemAllocator, (LPVOID *)&pPreferred);
1016
1017     if (SUCCEEDED(hr))
1018     {
1019         hr = IMemAllocator_SetProperties(pPreferred, pProps, pProps);
1020         /* FIXME: check we are still aligned */
1021         if (SUCCEEDED(hr))
1022         {
1023             *ppActual = pPreferred;
1024             TRACE("FileAsyncReader_RequestAllocator -- %x\n", hr);
1025         }
1026     }
1027
1028 done:
1029     if (SUCCEEDED(hr))
1030     {
1031         CoTaskMemFree(This->sample_list);
1032         if (This->handle_list)
1033         {
1034             int x;
1035             for (x = 0; x <= This->samples; ++x)
1036                 CloseHandle(This->handle_list[x]);
1037             CoTaskMemFree(This->handle_list);
1038         }
1039
1040         This->samples = pProps->cBuffers;
1041         This->oldest_sample = 0;
1042         TRACE("Samples: %u\n", This->samples);
1043         This->sample_list = CoTaskMemAlloc(sizeof(This->sample_list[0]) * pProps->cBuffers);
1044         This->handle_list = CoTaskMemAlloc(sizeof(HANDLE) * pProps->cBuffers * 2);
1045
1046         if (This->sample_list && This->handle_list)
1047         {
1048             int x;
1049             ZeroMemory(This->sample_list, sizeof(This->sample_list[0]) * pProps->cBuffers);
1050             for (x = 0; x < This->samples; ++x)
1051             {
1052                 This->sample_list[x].ovl.hEvent = This->handle_list[x] = CreateEventW(NULL, 0, 0, NULL);
1053                 if (x + 1 < This->samples)
1054                     This->handle_list[This->samples + 1 + x] = This->handle_list[x];
1055             }
1056             This->handle_list[This->samples] = CreateEventW(NULL, 1, 0, NULL);
1057             This->allocProps = *pProps;
1058         }
1059         else
1060         {
1061             hr = E_OUTOFMEMORY;
1062             CoTaskMemFree(This->sample_list);
1063             CoTaskMemFree(This->handle_list);
1064             This->samples = 0;
1065             This->sample_list = NULL;
1066             This->handle_list = NULL;
1067         }
1068     }
1069
1070     if (FAILED(hr))
1071     {
1072         *ppActual = NULL;
1073         if (pPreferred)
1074             IMemAllocator_Release(pPreferred);
1075     }
1076
1077     TRACE("-- %x\n", hr);
1078     return hr;
1079 }
1080
1081 /* we could improve the Request/WaitForNext mechanism by allowing out of order samples.
1082  * however, this would be quite complicated to do and may be a bit error prone */
1083 static HRESULT WINAPI FileAsyncReader_Request(IAsyncReader * iface, IMediaSample * pSample, DWORD_PTR dwUser)
1084 {
1085     HRESULT hr = S_OK;
1086     REFERENCE_TIME Start;
1087     REFERENCE_TIME Stop;
1088     FileAsyncReader *This = impl_from_IAsyncReader(iface);
1089     LPBYTE pBuffer = NULL;
1090
1091     TRACE("(%p, %lx)\n", pSample, dwUser);
1092
1093     if (!pSample)
1094         return E_POINTER;
1095
1096     /* get start and stop positions in bytes */
1097     if (SUCCEEDED(hr))
1098         hr = IMediaSample_GetTime(pSample, &Start, &Stop);
1099
1100     if (SUCCEEDED(hr))
1101         hr = IMediaSample_GetPointer(pSample, &pBuffer);
1102
1103     EnterCriticalSection(&This->csList);
1104     if (This->bFlushing)
1105     {
1106         LeaveCriticalSection(&This->csList);
1107         return VFW_E_WRONG_STATE;
1108     }
1109
1110     if (SUCCEEDED(hr))
1111     {
1112         DWORD dwLength = (DWORD) BYTES_FROM_MEDIATIME(Stop - Start);
1113         DATAREQUEST *pDataRq;
1114         int x;
1115
1116         /* Try to insert above the waiting sample if possible */
1117         for (x = This->oldest_sample; x < This->samples; ++x)
1118         {
1119             if (!This->sample_list[x].pSample)
1120                 break;
1121         }
1122
1123         if (x >= This->samples)
1124             for (x = 0; x < This->oldest_sample; ++x)
1125             {
1126                 if (!This->sample_list[x].pSample)
1127                     break;
1128             }
1129
1130         /* There must be a sample we have found */
1131         assert(x < This->samples);
1132         ++This->queued_number;
1133
1134         pDataRq = This->sample_list + x;
1135
1136         pDataRq->ovl.u.s.Offset = (DWORD) BYTES_FROM_MEDIATIME(Start);
1137         pDataRq->ovl.u.s.OffsetHigh = (DWORD)(BYTES_FROM_MEDIATIME(Start) >> (sizeof(DWORD) * 8));
1138         pDataRq->dwUserData = dwUser;
1139
1140         /* we violate traditional COM rules here by maintaining
1141          * a reference to the sample, but not calling AddRef, but
1142          * that's what MSDN says to do */
1143         pDataRq->pSample = pSample;
1144
1145         /* this is definitely not how it is implemented on Win9x
1146          * as they do not support async reads on files, but it is
1147          * sooo much easier to use this than messing around with threads!
1148          */
1149         if (!ReadFile(This->hFile, pBuffer, dwLength, NULL, &pDataRq->ovl))
1150             hr = HRESULT_FROM_WIN32(GetLastError());
1151
1152         /* ERROR_IO_PENDING is not actually an error since this is what we want! */
1153         if (hr == HRESULT_FROM_WIN32(ERROR_IO_PENDING))
1154             hr = S_OK;
1155     }
1156
1157     LeaveCriticalSection(&This->csList);
1158
1159     TRACE("-- %x\n", hr);
1160     return hr;
1161 }
1162
1163 static HRESULT WINAPI FileAsyncReader_WaitForNext(IAsyncReader * iface, DWORD dwTimeout, IMediaSample ** ppSample, DWORD_PTR * pdwUser)
1164 {
1165     HRESULT hr = S_OK;
1166     FileAsyncReader *This = impl_from_IAsyncReader(iface);
1167     DWORD buffer = ~0;
1168
1169     TRACE("(%u, %p, %p)\n", dwTimeout, ppSample, pdwUser);
1170
1171     *ppSample = NULL;
1172     *pdwUser = 0;
1173
1174     EnterCriticalSection(&This->csList);
1175     if (!This->bFlushing)
1176     {
1177         LONG oldest = This->oldest_sample;
1178
1179         if (!This->queued_number)
1180         {
1181             /* It could be that nothing is queued right now, but that can be fixed */
1182             WARN("Called without samples in queue and not flushing!!\n");
1183         }
1184         LeaveCriticalSection(&This->csList);
1185
1186         /* wait for an object to read, or time out */
1187         buffer = WaitForMultipleObjectsEx(This->samples+1, This->handle_list + oldest, FALSE, dwTimeout, TRUE);
1188
1189         EnterCriticalSection(&This->csList);
1190         if (buffer <= This->samples)
1191         {
1192             /* Re-scale the buffer back to normal */
1193             buffer += oldest;
1194
1195             /* Uh oh, we overshot the flusher handle, renormalize it back to 0..Samples-1 */
1196             if (buffer > This->samples)
1197                 buffer -= This->samples + 1;
1198             assert(buffer <= This->samples);
1199         }
1200
1201         if (buffer >= This->samples)
1202         {
1203             if (buffer != This->samples)
1204             {
1205                 FIXME("Returned: %u (%08x)\n", buffer, GetLastError());
1206                 hr = VFW_E_TIMEOUT;
1207             }
1208             else
1209                 hr = VFW_E_WRONG_STATE;
1210             buffer = ~0;
1211         }
1212         else
1213             --This->queued_number;
1214     }
1215
1216     if (This->bFlushing && buffer == ~0)
1217     {
1218         for (buffer = 0; buffer < This->samples; ++buffer)
1219         {
1220             if (This->sample_list[buffer].pSample)
1221             {
1222                 ResetEvent(This->handle_list[buffer]);
1223                 break;
1224             }
1225         }
1226         if (buffer == This->samples)
1227         {
1228             assert(!This->queued_number);
1229             hr = VFW_E_TIMEOUT;
1230         }
1231         else
1232         {
1233             --This->queued_number;
1234             hr = S_OK;
1235         }
1236     }
1237
1238     if (SUCCEEDED(hr))
1239     {
1240         REFERENCE_TIME rtStart, rtStop;
1241         REFERENCE_TIME rtSampleStart, rtSampleStop;
1242         DATAREQUEST *pDataRq = This->sample_list + buffer;
1243         DWORD dwBytes = 0;
1244
1245         /* get any errors */
1246         if (!This->bFlushing && !GetOverlappedResult(This->hFile, &pDataRq->ovl, &dwBytes, FALSE))
1247             hr = HRESULT_FROM_WIN32(GetLastError());
1248
1249         /* Return the sample no matter what so it can be destroyed */
1250         *ppSample = pDataRq->pSample;
1251         *pdwUser = pDataRq->dwUserData;
1252
1253         if (This->bFlushing)
1254             hr = VFW_E_WRONG_STATE;
1255
1256         if (FAILED(hr))
1257             dwBytes = 0;
1258
1259         /* Set the time on the sample */
1260         IMediaSample_SetActualDataLength(pDataRq->pSample, dwBytes);
1261
1262         rtStart = (DWORD64)pDataRq->ovl.u.s.Offset + ((DWORD64)pDataRq->ovl.u.s.OffsetHigh << 32);
1263         rtStart = MEDIATIME_FROM_BYTES(rtStart);
1264         rtStop = rtStart + MEDIATIME_FROM_BYTES(dwBytes);
1265
1266         IMediaSample_GetTime(pDataRq->pSample, &rtSampleStart, &rtSampleStop);
1267         assert(rtStart == rtSampleStart);
1268         assert(rtStop <= rtSampleStop);
1269
1270         IMediaSample_SetTime(pDataRq->pSample, &rtStart, &rtStop);
1271         assert(rtStart == rtSampleStart);
1272         if (hr == S_OK)
1273             assert(rtStop == rtSampleStop);
1274         else
1275             assert(rtStop == rtStart);
1276
1277         This->sample_list[buffer].pSample = NULL;
1278         assert(This->oldest_sample < This->samples);
1279
1280         if (buffer == This->oldest_sample)
1281         {
1282             LONG x;
1283             for (x = This->oldest_sample + 1; x < This->samples; ++x)
1284                 if (This->sample_list[x].pSample)
1285                     break;
1286             if (x >= This->samples)
1287                 for (x = 0; x < This->oldest_sample; ++x)
1288                     if (This->sample_list[x].pSample)
1289                         break;
1290             if (This->oldest_sample == x)
1291                 /* No samples found, reset to 0 */
1292                 x = 0;
1293             This->oldest_sample = x;
1294         }
1295     }
1296     LeaveCriticalSection(&This->csList);
1297
1298     TRACE("-- %x\n", hr);
1299     return hr;
1300 }
1301
1302 static HRESULT WINAPI FileAsyncReader_SyncRead(IAsyncReader * iface, LONGLONG llPosition, LONG lLength, BYTE * pBuffer);
1303
1304 static HRESULT WINAPI FileAsyncReader_SyncReadAligned(IAsyncReader * iface, IMediaSample * pSample)
1305 {
1306     BYTE * pBuffer;
1307     REFERENCE_TIME tStart;
1308     REFERENCE_TIME tStop;
1309     HRESULT hr;
1310
1311     TRACE("(%p)\n", pSample);
1312
1313     hr = IMediaSample_GetTime(pSample, &tStart, &tStop);
1314
1315     if (SUCCEEDED(hr))
1316         hr = IMediaSample_GetPointer(pSample, &pBuffer);
1317
1318     if (SUCCEEDED(hr))
1319         hr = FileAsyncReader_SyncRead(iface,
1320             BYTES_FROM_MEDIATIME(tStart),
1321             (LONG) BYTES_FROM_MEDIATIME(tStop - tStart),
1322             pBuffer);
1323
1324     TRACE("-- %x\n", hr);
1325     return hr;
1326 }
1327
1328 static HRESULT WINAPI FileAsyncReader_SyncRead(IAsyncReader * iface, LONGLONG llPosition, LONG lLength, BYTE * pBuffer)
1329 {
1330     OVERLAPPED ovl;
1331     HRESULT hr = S_OK;
1332     FileAsyncReader *This = impl_from_IAsyncReader(iface);
1333
1334     TRACE("(%x%08x, %d, %p)\n", (ULONG)(llPosition >> 32), (ULONG)llPosition, lLength, pBuffer);
1335
1336     ZeroMemory(&ovl, sizeof(ovl));
1337
1338     ovl.hEvent = CreateEventW(NULL, 0, 0, NULL);
1339     /* NOTE: llPosition is the actual byte position to start reading from */
1340     ovl.u.s.Offset = (DWORD) llPosition;
1341     ovl.u.s.OffsetHigh = (DWORD) (llPosition >> (sizeof(DWORD) * 8));
1342
1343     if (!ReadFile(This->hFile, pBuffer, lLength, NULL, &ovl))
1344         hr = HRESULT_FROM_WIN32(GetLastError());
1345
1346     if (hr == HRESULT_FROM_WIN32(ERROR_IO_PENDING))
1347         hr = S_OK;
1348
1349     if (SUCCEEDED(hr))
1350     {
1351         DWORD dwBytesRead;
1352
1353         if (!GetOverlappedResult(This->hFile, &ovl, &dwBytesRead, TRUE))
1354             hr = HRESULT_FROM_WIN32(GetLastError());
1355     }
1356
1357     CloseHandle(ovl.hEvent);
1358
1359     TRACE("-- %x\n", hr);
1360     return hr;
1361 }
1362
1363 static HRESULT WINAPI FileAsyncReader_Length(IAsyncReader * iface, LONGLONG * pTotal, LONGLONG * pAvailable)
1364 {
1365     DWORD dwSizeLow;
1366     DWORD dwSizeHigh;
1367     FileAsyncReader *This = impl_from_IAsyncReader(iface);
1368
1369     TRACE("(%p, %p)\n", pTotal, pAvailable);
1370
1371     if (((dwSizeLow = GetFileSize(This->hFile, &dwSizeHigh)) == -1) &&
1372         (GetLastError() != NO_ERROR))
1373         return HRESULT_FROM_WIN32(GetLastError());
1374
1375     *pTotal = (LONGLONG)dwSizeLow | (LONGLONG)dwSizeHigh << (sizeof(DWORD) * 8);
1376
1377     *pAvailable = *pTotal;
1378
1379     return S_OK;
1380 }
1381
1382 static HRESULT WINAPI FileAsyncReader_BeginFlush(IAsyncReader * iface)
1383 {
1384     FileAsyncReader *This = impl_from_IAsyncReader(iface);
1385
1386     TRACE("()\n");
1387
1388     EnterCriticalSection(&This->csList);
1389     This->bFlushing = TRUE;
1390     CancelIo(This->hFile);
1391     SetEvent(This->handle_list[This->samples]);
1392     LeaveCriticalSection(&This->csList);
1393
1394     return S_OK;
1395 }
1396
1397 static HRESULT WINAPI FileAsyncReader_EndFlush(IAsyncReader * iface)
1398 {
1399     FileAsyncReader *This = impl_from_IAsyncReader(iface);
1400     int x;
1401
1402     TRACE("()\n");
1403
1404     EnterCriticalSection(&This->csList);
1405     ResetEvent(This->handle_list[This->samples]);
1406     This->bFlushing = FALSE;
1407     for (x = 0; x < This->samples; ++x)
1408         assert(!This->sample_list[x].pSample);
1409
1410     LeaveCriticalSection(&This->csList);
1411
1412     return S_OK;
1413 }
1414
1415 static const IAsyncReaderVtbl FileAsyncReader_Vtbl =
1416 {
1417     FileAsyncReader_QueryInterface,
1418     FileAsyncReader_AddRef,
1419     FileAsyncReader_Release,
1420     FileAsyncReader_RequestAllocator,
1421     FileAsyncReader_Request,
1422     FileAsyncReader_WaitForNext,
1423     FileAsyncReader_SyncReadAligned,
1424     FileAsyncReader_SyncRead,
1425     FileAsyncReader_Length,
1426     FileAsyncReader_BeginFlush,
1427     FileAsyncReader_EndFlush,
1428 };
1429
1430
1431 static HRESULT WINAPI AMFilterMiscFlags_QueryInterface(IAMFilterMiscFlags *iface, REFIID riid, void **ppv) {
1432     AsyncReader *This = impl_from_IAMFilterMiscFlags(iface);
1433     return IUnknown_QueryInterface((IUnknown*)This, riid, ppv);
1434 }
1435
1436 static ULONG WINAPI AMFilterMiscFlags_AddRef(IAMFilterMiscFlags *iface) {
1437     AsyncReader *This = impl_from_IAMFilterMiscFlags(iface);
1438     return IUnknown_AddRef((IUnknown*)This);
1439 }
1440
1441 static ULONG WINAPI AMFilterMiscFlags_Release(IAMFilterMiscFlags *iface) {
1442     AsyncReader *This = impl_from_IAMFilterMiscFlags(iface);
1443     return IUnknown_Release((IUnknown*)This);
1444 }
1445
1446 static ULONG WINAPI AMFilterMiscFlags_GetMiscFlags(IAMFilterMiscFlags *iface) {
1447     return AM_FILTER_MISC_FLAGS_IS_SOURCE;
1448 }
1449
1450 static const IAMFilterMiscFlagsVtbl IAMFilterMiscFlags_Vtbl = {
1451     AMFilterMiscFlags_QueryInterface,
1452     AMFilterMiscFlags_AddRef,
1453     AMFilterMiscFlags_Release,
1454     AMFilterMiscFlags_GetMiscFlags
1455 };