dlls/strmbase/pin.c

   1 /*
   2  * Generic Implementation of IPin Interface
   3  *
   4  * Copyright 2003 Robert Shearman
   5  * Copyright 2010 Aric Stewart, CodeWeavers
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  */
  21
  22 #define COBJMACROS
  23
  24 #include "dshow.h"
  25 #include "wine/debug.h"
  26 #include "wine/unicode.h"
  27 #include "wine/strmbase.h"
  28 #include "uuids.h"
  29 #include "vfwmsgs.h"
  30 #include <assert.h>
  31
  32 WINE_DEFAULT_DEBUG_CHANNEL(strmbase);
  33
  34 static const IPinVtbl InputPin_Vtbl;
  35 static const IPinVtbl OutputPin_Vtbl;
  36 static const IMemInputPinVtbl MemInputPin_Vtbl;
  37
  38 typedef HRESULT (*SendPinFunc)( IPin *to, LPVOID arg );
  39
  40 /** Helper function, there are a lot of places where the error code is inherited
  41  * The following rules apply:
  42  *
  43  * Return the first received error code (E_NOTIMPL is ignored)
  44  * If no errors occur: return the first received non-error-code that isn't S_OK
  45  */
  46 static HRESULT updatehres( HRESULT original, HRESULT new )
  47 {
  48     if (FAILED( original ) || new == E_NOTIMPL)
  49         return original;
  50
  51     if (FAILED( new ) || original == S_OK)
  52         return new;
  53
  54     return original;
  55 }
  56
  57 /** Sends a message from a pin further to other, similar pins
  58  * fnMiddle is called on each pin found further on the stream.
  59  * fnEnd (can be NULL) is called when the message can't be sent any further (this is a renderer or source)
  60  *
  61  * If the pin given is an input pin, the message will be sent downstream to other input pins
  62  * If the pin given is an output pin, the message will be sent upstream to other output pins
  63  */
  64 static HRESULT SendFurther( IPin *from, SendPinFunc fnMiddle, LPVOID arg, SendPinFunc fnEnd )
  65 {
  66     PIN_INFO pin_info;
  67     ULONG amount = 0;
  68     HRESULT hr = S_OK;
  69     HRESULT hr_return = S_OK;
  70     IEnumPins *enumpins = NULL;
  71     BOOL foundend = TRUE;
  72     PIN_DIRECTION from_dir;
  73
  74     IPin_QueryDirection( from, &from_dir );
  75
  76     hr = IPin_QueryInternalConnections( from, NULL, &amount );
  77     if (hr != E_NOTIMPL && amount)
  78         FIXME("Use QueryInternalConnections!\n");
  79      hr = S_OK;
  80
  81     pin_info.pFilter = NULL;
  82     hr = IPin_QueryPinInfo( from, &pin_info );
  83     if (FAILED(hr))
  84         goto out;
  85
  86     hr = IBaseFilter_EnumPins( pin_info.pFilter, &enumpins );
  87     if (FAILED(hr))
  88         goto out;
  89
  90     hr = IEnumPins_Reset( enumpins );
  91     while (hr == S_OK) {
  92         IPin *pin = NULL;
  93         hr = IEnumPins_Next( enumpins, 1, &pin, NULL );
  94         if (hr == VFW_E_ENUM_OUT_OF_SYNC)
  95         {
  96             hr = IEnumPins_Reset( enumpins );
  97             continue;
  98         }
  99         if (pin)
 100         {
 101             PIN_DIRECTION dir;
 102
 103             IPin_QueryDirection( pin, &dir );
 104             if (dir != from_dir)
 105             {
 106                 IPin *connected = NULL;
 107
 108                 foundend = FALSE;
 109                 IPin_ConnectedTo( pin, &connected );
 110                 if (connected)
 111                 {
 112                     HRESULT hr_local;
 113
 114                     hr_local = fnMiddle( connected, arg );
 115                     hr_return = updatehres( hr_return, hr_local );
 116                     IPin_Release(connected);
 117                 }
 118             }
 119             IPin_Release( pin );
 120         }
 121         else
 122         {
 123             hr = S_OK;
 124             break;
 125         }
 126     }
 127
 128     if (!foundend)
 129         hr = hr_return;
 130     else if (fnEnd) {
 131         HRESULT hr_local;
 132
 133         hr_local = fnEnd( from, arg );
 134         hr_return = updatehres( hr_return, hr_local );
 135     }
 136     IEnumPins_Release(enumpins);
 137
 138 out:
 139     if (pin_info.pFilter)
 140         IBaseFilter_Release( pin_info.pFilter );
 141     return hr;
 142 }
 143
 144 static void Copy_PinInfo(PIN_INFO * pDest, const PIN_INFO * pSrc)
 145 {
 146     /* Tempting to just do a memcpy, but the name field is
 147        128 characters long! We will probably never exceed 10
 148        most of the time, so we are better off copying
 149        each field manually */
 150     strcpyW(pDest->achName, pSrc->achName);
 151     pDest->dir = pSrc->dir;
 152     pDest->pFilter = pSrc->pFilter;
 153 }
 154
 155 static void dump_AM_MEDIA_TYPE(const AM_MEDIA_TYPE * pmt)
 156 {
 157     if (!pmt)
 158         return;
 159     TRACE("\t%s\n\t%s\n\t...\n\t%s\n", debugstr_guid(&pmt->majortype), debugstr_guid(&pmt->subtype), debugstr_guid(&pmt->formattype));
 160 }
 161
 162 static BOOL CompareMediaTypes(const AM_MEDIA_TYPE * pmt1, const AM_MEDIA_TYPE * pmt2, BOOL bWildcards)
 163 {
 164     TRACE("pmt1: ");
 165     dump_AM_MEDIA_TYPE(pmt1);
 166     TRACE("pmt2: ");
 167     dump_AM_MEDIA_TYPE(pmt2);
 168     return (((bWildcards && (IsEqualGUID(&pmt1->majortype, &GUID_NULL) || IsEqualGUID(&pmt2->majortype, &GUID_NULL))) || IsEqualGUID(&pmt1->majortype, &pmt2->majortype)) &&
 169             ((bWildcards && (IsEqualGUID(&pmt1->subtype, &GUID_NULL)   || IsEqualGUID(&pmt2->subtype, &GUID_NULL)))   || IsEqualGUID(&pmt1->subtype, &pmt2->subtype)));
 170 }
 171
 172 /*** Common Base Pin function */
 173 HRESULT WINAPI BasePinImpl_GetMediaType(BasePin *iface, int iPosition, AM_MEDIA_TYPE *pmt)
 174 {
 175     if (iPosition < 0)
 176         return E_INVALIDARG;
 177     return VFW_S_NO_MORE_ITEMS;
 178 }
 179
 180 LONG WINAPI BasePinImpl_GetMediaTypeVersion(BasePin *iface)
 181 {
 182     return 1;
 183 }
 184
 185 ULONG WINAPI BasePinImpl_AddRef(IPin * iface)
 186 {
 187     BasePin *This = (BasePin *)iface;
 188     ULONG refCount = InterlockedIncrement(&This->refCount);
 189
 190     TRACE("(%p)->() AddRef from %d\n", iface, refCount - 1);
 191
 192     return refCount;
 193 }
 194
 195 HRESULT WINAPI BasePinImpl_Disconnect(IPin * iface)
 196 {
 197     HRESULT hr;
 198     BasePin *This = (BasePin *)iface;
 199
 200     TRACE("()\n");
 201
 202     EnterCriticalSection(This->pCritSec);
 203     {
 204         if (This->pConnectedTo)
 205         {
 206             IPin_Release(This->pConnectedTo);
 207             This->pConnectedTo = NULL;
 208             FreeMediaType(&This->mtCurrent);
 209             ZeroMemory(&This->mtCurrent, sizeof(This->mtCurrent));
 210             hr = S_OK;
 211         }
 212         else
 213             hr = S_FALSE;
 214     }
 215     LeaveCriticalSection(This->pCritSec);
 216
 217     return hr;
 218 }
 219
 220 HRESULT WINAPI BasePinImpl_ConnectedTo(IPin * iface, IPin ** ppPin)
 221 {
 222     HRESULT hr;
 223     BasePin *This = (BasePin *)iface;
 224
 225     TRACE("(%p)\n", ppPin);
 226
 227     EnterCriticalSection(This->pCritSec);
 228     {
 229         if (This->pConnectedTo)
 230         {
 231             *ppPin = This->pConnectedTo;
 232             IPin_AddRef(*ppPin);
 233             hr = S_OK;
 234         }
 235         else
 236         {
 237             hr = VFW_E_NOT_CONNECTED;
 238             *ppPin = NULL;
 239         }
 240     }
 241     LeaveCriticalSection(This->pCritSec);
 242
 243     return hr;
 244 }
 245
 246 HRESULT WINAPI BasePinImpl_ConnectionMediaType(IPin * iface, AM_MEDIA_TYPE * pmt)
 247 {
 248     HRESULT hr;
 249     BasePin *This = (BasePin *)iface;
 250
 251     TRACE("(%p/%p)->(%p)\n", This, iface, pmt);
 252
 253     EnterCriticalSection(This->pCritSec);
 254     {
 255         if (This->pConnectedTo)
 256         {
 257             CopyMediaType(pmt, &This->mtCurrent);
 258             hr = S_OK;
 259         }
 260         else
 261         {
 262             ZeroMemory(pmt, sizeof(*pmt));
 263             hr = VFW_E_NOT_CONNECTED;
 264         }
 265     }
 266     LeaveCriticalSection(This->pCritSec);
 267
 268     return hr;
 269 }
 270
 271 HRESULT WINAPI BasePinImpl_QueryPinInfo(IPin * iface, PIN_INFO * pInfo)
 272 {
 273     BasePin *This = (BasePin *)iface;
 274
 275     TRACE("(%p/%p)->(%p)\n", This, iface, pInfo);
 276
 277     Copy_PinInfo(pInfo, &This->pinInfo);
 278     IBaseFilter_AddRef(pInfo->pFilter);
 279
 280     return S_OK;
 281 }
 282
 283 HRESULT WINAPI BasePinImpl_QueryDirection(IPin * iface, PIN_DIRECTION * pPinDir)
 284 {
 285     BasePin *This = (BasePin *)iface;
 286
 287     TRACE("(%p/%p)->(%p)\n", This, iface, pPinDir);
 288
 289     *pPinDir = This->pinInfo.dir;
 290
 291     return S_OK;
 292 }
 293
 294 HRESULT WINAPI BasePinImpl_QueryId(IPin * iface, LPWSTR * Id)
 295 {
 296     BasePin *This = (BasePin *)iface;
 297
 298     TRACE("(%p/%p)->(%p)\n", This, iface, Id);
 299
 300     *Id = CoTaskMemAlloc((strlenW(This->pinInfo.achName) + 1) * sizeof(WCHAR));
 301     if (!*Id)
 302         return E_OUTOFMEMORY;
 303
 304     strcpyW(*Id, This->pinInfo.achName);
 305
 306     return S_OK;
 307 }
 308
 309 HRESULT WINAPI BasePinImpl_QueryAccept(IPin * iface, const AM_MEDIA_TYPE * pmt)
 310 {
 311     TRACE("(%p)->(%p)\n", iface, pmt);
 312
 313     return S_OK;
 314 }
 315
 316 HRESULT WINAPI BasePinImpl_EnumMediaTypes(IPin * iface, IEnumMediaTypes ** ppEnum)
 317 {
 318     BasePin *This = (BasePin *)iface;
 319
 320     TRACE("(%p/%p)->(%p)\n", This, iface, ppEnum);
 321
 322     /* override this method to allow enumeration of your types */
 323
 324     return EnumMediaTypes_Construct(This, This->pFuncsTable->pfnGetMediaType, This->pFuncsTable->pfnGetMediaTypeVersion , ppEnum);
 325 }
 326
 327 HRESULT WINAPI BasePinImpl_QueryInternalConnections(IPin * iface, IPin ** apPin, ULONG * cPin)
 328 {
 329     BasePin *This = (BasePin *)iface;
 330
 331     TRACE("(%p/%p)->(%p, %p)\n", This, iface, apPin, cPin);
 332
 333     return E_NOTIMPL; /* to tell caller that all input pins connected to all output pins */
 334 }
 335
 336 HRESULT WINAPI BasePinImpl_NewSegment(IPin * iface, REFERENCE_TIME tStart, REFERENCE_TIME tStop, double dRate)
 337 {
 338     BasePin *This = (BasePin *)iface;
 339
 340     TRACE("(%x%08x, %x%08x, %e)\n", (ULONG)(tStart >> 32), (ULONG)tStart, (ULONG)(tStop >> 32), (ULONG)tStop, dRate);
 341
 342     This->tStart = tStart;
 343     This->tStop = tStop;
 344     This->dRate = dRate;
 345
 346     return S_OK;
 347 }
 348
 349 /*** OutputPin implementation ***/
 350
 351 HRESULT WINAPI BaseOutputPinImpl_QueryInterface(IPin * iface, REFIID riid, LPVOID * ppv)
 352 {
 353     BaseOutputPin *This = (BaseOutputPin *)iface;
 354
 355     TRACE("(%p/%p)->(%s, %p)\n", This, iface, debugstr_guid(riid), ppv);
 356
 357     *ppv = NULL;
 358
 359     if (IsEqualIID(riid, &IID_IUnknown))
 360         *ppv = iface;
 361     else if (IsEqualIID(riid, &IID_IPin))
 362         *ppv = iface;
 363     else if (IsEqualIID(riid, &IID_IMediaSeeking) ||
 364              IsEqualIID(riid, &IID_IQualityControl))
 365     {
 366         return IBaseFilter_QueryInterface(This->pin.pinInfo.pFilter, riid, ppv);
 367     }
 368
 369     if (*ppv)
 370     {
 371         IUnknown_AddRef((IUnknown *)(*ppv));
 372         return S_OK;
 373     }
 374
 375     FIXME("No interface for %s!\n", debugstr_guid(riid));
 376
 377     return E_NOINTERFACE;
 378 }
 379
 380 ULONG WINAPI BaseOutputPinImpl_Release(IPin * iface)
 381 {
 382     BaseOutputPin *This = (BaseOutputPin *)iface;
 383     ULONG refCount = InterlockedDecrement(&This->pin.refCount);
 384
 385     TRACE("(%p)->() Release from %d\n", iface, refCount + 1);
 386
 387     if (!refCount)
 388     {
 389         FreeMediaType(&This->pin.mtCurrent);
 390         CoTaskMemFree(This);
 391         return 0;
 392     }
 393     return refCount;
 394 }
 395
 396 HRESULT WINAPI BaseOutputPinImpl_Connect(IPin * iface, IPin * pReceivePin, const AM_MEDIA_TYPE * pmt)
 397 {
 398     HRESULT hr;
 399     BaseOutputPin *This = (BaseOutputPin *)iface;
 400
 401     TRACE("(%p/%p)->(%p, %p)\n", This, iface, pReceivePin, pmt);
 402     dump_AM_MEDIA_TYPE(pmt);
 403
 404     /* If we try to connect to ourselves, we will definitely deadlock.
 405      * There are other cases where we could deadlock too, but this
 406      * catches the obvious case */
 407     assert(pReceivePin != iface);
 408
 409     EnterCriticalSection(This->pin.pCritSec);
 410     {
 411         /* if we have been a specific type to connect with, then we can either connect
 412          * with that or fail. We cannot choose different AM_MEDIA_TYPE */
 413         if (pmt && !IsEqualGUID(&pmt->majortype, &GUID_NULL) && !IsEqualGUID(&pmt->subtype, &GUID_NULL))
 414             hr = This->pin.pFuncsTable->pfnAttemptConnection((BasePin*)This, pReceivePin, pmt);
 415         else
 416         {
 417             /* negotiate media type */
 418
 419             IEnumMediaTypes * pEnumCandidates;
 420             AM_MEDIA_TYPE * pmtCandidate = NULL; /* Candidate media type */
 421
 422             if (SUCCEEDED(hr = IPin_EnumMediaTypes(iface, &pEnumCandidates)))
 423             {
 424                 hr = VFW_E_NO_ACCEPTABLE_TYPES; /* Assume the worst, but set to S_OK if connected successfully */
 425
 426                 /* try this filter's media types first */
 427                 while (S_OK == IEnumMediaTypes_Next(pEnumCandidates, 1, &pmtCandidate, NULL))
 428                 {
 429                     assert(pmtCandidate);
 430                     dump_AM_MEDIA_TYPE(pmtCandidate);
 431                     if (!IsEqualGUID(&FORMAT_None, &pmtCandidate->formattype)
 432                         && !IsEqualGUID(&GUID_NULL, &pmtCandidate->formattype))
 433                         assert(pmtCandidate->pbFormat);
 434                     if (( !pmt || CompareMediaTypes(pmt, pmtCandidate, TRUE) ) &&
 435                         (This->pin.pFuncsTable->pfnAttemptConnection((BasePin*)This, pReceivePin, pmtCandidate) == S_OK))
 436                     {
 437                         hr = S_OK;
 438                         DeleteMediaType(pmtCandidate);
 439                         break;
 440                     }
 441                     DeleteMediaType(pmtCandidate);
 442                     pmtCandidate = NULL;
 443                 }
 444                 IEnumMediaTypes_Release(pEnumCandidates);
 445             }
 446
 447             /* then try receiver filter's media types */
 448             if (hr != S_OK && SUCCEEDED(hr = IPin_EnumMediaTypes(pReceivePin, &pEnumCandidates))) /* if we haven't already connected successfully */
 449             {
 450                 hr = VFW_E_NO_ACCEPTABLE_TYPES; /* Assume the worst, but set to S_OK if connected successfully */
 451
 452                 while (S_OK == IEnumMediaTypes_Next(pEnumCandidates, 1, &pmtCandidate, NULL))
 453                 {
 454                     assert(pmtCandidate);
 455                     dump_AM_MEDIA_TYPE(pmtCandidate);
 456                     if (( !pmt || CompareMediaTypes(pmt, pmtCandidate, TRUE) ) &&
 457                         (This->pin.pFuncsTable->pfnAttemptConnection((BasePin*)This, pReceivePin, pmtCandidate) == S_OK))
 458                     {
 459                         hr = S_OK;
 460                         DeleteMediaType(pmtCandidate);
 461                         break;
 462                     }
 463                     DeleteMediaType(pmtCandidate);
 464                     pmtCandidate = NULL;
 465                 } /* while */
 466                 IEnumMediaTypes_Release(pEnumCandidates);
 467             } /* if not found */
 468         } /* if negotiate media type */
 469     } /* if succeeded */
 470     LeaveCriticalSection(This->pin.pCritSec);
 471
 472     TRACE(" -- %x\n", hr);
 473     return hr;
 474 }
 475
 476 HRESULT WINAPI BaseOutputPinImpl_ReceiveConnection(IPin * iface, IPin * pReceivePin, const AM_MEDIA_TYPE * pmt)
 477 {
 478     ERR("Incoming connection on an output pin! (%p, %p)\n", pReceivePin, pmt);
 479
 480     return E_UNEXPECTED;
 481 }
 482
 483 HRESULT WINAPI BaseOutputPinImpl_Disconnect(IPin * iface)
 484 {
 485     HRESULT hr;
 486     BaseOutputPin *This = (BaseOutputPin *)iface;
 487
 488     TRACE("()\n");
 489
 490     EnterCriticalSection(This->pin.pCritSec);
 491     {
 492         if (This->pMemInputPin)
 493         {
 494             IMemInputPin_Release(This->pMemInputPin);
 495             This->pMemInputPin = NULL;
 496         }
 497         if (This->pin.pConnectedTo)
 498         {
 499             IPin_Release(This->pin.pConnectedTo);
 500             This->pin.pConnectedTo = NULL;
 501             FreeMediaType(&This->pin.mtCurrent);
 502             ZeroMemory(&This->pin.mtCurrent, sizeof(This->pin.mtCurrent));
 503             hr = S_OK;
 504         }
 505         else
 506             hr = S_FALSE;
 507     }
 508     LeaveCriticalSection(This->pin.pCritSec);
 509
 510     return hr;
 511 }
 512
 513 HRESULT WINAPI BaseOutputPinImpl_EndOfStream(IPin * iface)
 514 {
 515     TRACE("()\n");
 516
 517     /* not supposed to do anything in an output pin */
 518
 519     return E_UNEXPECTED;
 520 }
 521
 522 HRESULT WINAPI BaseOutputPinImpl_BeginFlush(IPin * iface)
 523 {
 524     TRACE("(%p)->()\n", iface);
 525
 526     /* not supposed to do anything in an output pin */
 527
 528     return E_UNEXPECTED;
 529 }
 530
 531 HRESULT WINAPI BaseOutputPinImpl_EndFlush(IPin * iface)
 532 {
 533     TRACE("(%p)->()\n", iface);
 534
 535     /* not supposed to do anything in an output pin */
 536
 537     return E_UNEXPECTED;
 538 }
 539
 540 static const IPinVtbl OutputPin_Vtbl =
 541 {
 542     BaseOutputPinImpl_QueryInterface,
 543     BasePinImpl_AddRef,
 544     BaseOutputPinImpl_Release,
 545     BaseOutputPinImpl_Connect,
 546     BaseOutputPinImpl_ReceiveConnection,
 547     BaseOutputPinImpl_Disconnect,
 548     BasePinImpl_ConnectedTo,
 549     BasePinImpl_ConnectionMediaType,
 550     BasePinImpl_QueryPinInfo,
 551     BasePinImpl_QueryDirection,
 552     BasePinImpl_QueryId,
 553     BasePinImpl_QueryAccept,
 554     BasePinImpl_EnumMediaTypes,
 555     BasePinImpl_QueryInternalConnections,
 556     BaseOutputPinImpl_EndOfStream,
 557     BaseOutputPinImpl_BeginFlush,
 558     BaseOutputPinImpl_EndFlush,
 559     BasePinImpl_NewSegment
 560 };
 561
 562 HRESULT WINAPI BaseOutputPinImpl_GetDeliveryBuffer(BaseOutputPin *This, IMediaSample ** ppSample, REFERENCE_TIME * tStart, REFERENCE_TIME * tStop, DWORD dwFlags)
 563 {
 564     HRESULT hr;
 565
 566     TRACE("(%p, %p, %p, %x)\n", ppSample, tStart, tStop, dwFlags);
 567
 568     EnterCriticalSection(This->pin.pCritSec);
 569     {
 570         if (!This->pin.pConnectedTo)
 571             hr = VFW_E_NOT_CONNECTED;
 572         else
 573         {
 574             IMemAllocator * pAlloc = NULL;
 575
 576             hr = IMemInputPin_GetAllocator(This->pMemInputPin, &pAlloc);
 577
 578             if (SUCCEEDED(hr))
 579                 hr = IMemAllocator_GetBuffer(pAlloc, ppSample, tStart, tStop, dwFlags);
 580
 581             if (SUCCEEDED(hr))
 582                 hr = IMediaSample_SetTime(*ppSample, tStart, tStop);
 583
 584             if (pAlloc)
 585                 IMemAllocator_Release(pAlloc);
 586         }
 587     }
 588     LeaveCriticalSection(This->pin.pCritSec);
 589
 590     return hr;
 591 }
 592
 593 /* replaces OutputPin_SendSample */
 594 HRESULT WINAPI BaseOutputPinImpl_Deliver(BaseOutputPin *This, IMediaSample * pSample)
 595 {
 596     HRESULT hr = S_OK;
 597     IMemInputPin * pMemConnected = NULL;
 598     PIN_INFO pinInfo;
 599
 600     EnterCriticalSection(This->pin.pCritSec);
 601     {
 602         if (!This->pin.pConnectedTo || !This->pMemInputPin)
 603             hr = VFW_E_NOT_CONNECTED;
 604         else
 605         {
 606             /* we don't have the lock held when using This->pMemInputPin,
 607              * so we need to AddRef it to stop it being deleted while we are
 608              * using it. Same with its filter. */
 609             pMemConnected = This->pMemInputPin;
 610             IMemInputPin_AddRef(pMemConnected);
 611             hr = IPin_QueryPinInfo(This->pin.pConnectedTo, &pinInfo);
 612         }
 613     }
 614     LeaveCriticalSection(This->pin.pCritSec);
 615
 616     if (SUCCEEDED(hr))
 617     {
 618         /* NOTE: if we are in a critical section when Receive is called
 619          * then it causes some problems (most notably with the native Video
 620          * Renderer) if we are re-entered for whatever reason */
 621         hr = IMemInputPin_Receive(pMemConnected, pSample);
 622
 623         /* If the filter's destroyed, tell upstream to stop sending data */
 624         if(IBaseFilter_Release(pinInfo.pFilter) == 0 && SUCCEEDED(hr))
 625             hr = S_FALSE;
 626     }
 627     if (pMemConnected)
 628         IMemInputPin_Release(pMemConnected);
 629
 630     return hr;
 631 }
 632
 633 /* replaces OutputPin_CommitAllocator */
 634 HRESULT WINAPI BaseOutputPinImpl_Active(BaseOutputPin *This)
 635 {
 636     HRESULT hr = S_OK;
 637
 638     TRACE("(%p)->()\n", This);
 639
 640     EnterCriticalSection(This->pin.pCritSec);
 641     {
 642         if (!This->pin.pConnectedTo || !This->pMemInputPin)
 643             hr = VFW_E_NOT_CONNECTED;
 644         else
 645         {
 646             IMemAllocator * pAlloc = NULL;
 647
 648             hr = IMemInputPin_GetAllocator(This->pMemInputPin, &pAlloc);
 649
 650             if (SUCCEEDED(hr))
 651                 hr = IMemAllocator_Commit(pAlloc);
 652
 653             if (pAlloc)
 654                 IMemAllocator_Release(pAlloc);
 655         }
 656     }
 657     LeaveCriticalSection(This->pin.pCritSec);
 658
 659     TRACE("--> %08x\n", hr);
 660     return hr;
 661 }
 662
 663 /* replaces OutputPin_DecommitAllocator */
 664 HRESULT WINAPI BaseOutputPinImpl_Inactive(BaseOutputPin *This)
 665 {
 666     HRESULT hr = S_OK;
 667
 668     TRACE("(%p)->()\n", This);
 669
 670     EnterCriticalSection(This->pin.pCritSec);
 671     {
 672         if (!This->pin.pConnectedTo || !This->pMemInputPin)
 673             hr = VFW_E_NOT_CONNECTED;
 674         else
 675         {
 676             IMemAllocator * pAlloc = NULL;
 677
 678             hr = IMemInputPin_GetAllocator(This->pMemInputPin, &pAlloc);
 679
 680             if (SUCCEEDED(hr))
 681                 hr = IMemAllocator_Decommit(pAlloc);
 682
 683             if (pAlloc)
 684                 IMemAllocator_Release(pAlloc);
 685         }
 686     }
 687     LeaveCriticalSection(This->pin.pCritSec);
 688
 689     TRACE("--> %08x\n", hr);
 690     return hr;
 691 }
 692
 693 /* replaces OutputPin_DeliverDisconnect */
 694 HRESULT WINAPI BaseOutputPinImpl_BreakConnect(BaseOutputPin *This)
 695 {
 696     HRESULT hr;
 697
 698     TRACE("(%p)->()\n", This);
 699
 700     EnterCriticalSection(This->pin.pCritSec);
 701     {
 702         if (!This->pin.pConnectedTo || !This->pMemInputPin)
 703             hr = VFW_E_NOT_CONNECTED;
 704         else
 705         {
 706             IMemAllocator * pAlloc = NULL;
 707
 708             hr = IMemInputPin_GetAllocator(This->pMemInputPin, &pAlloc);
 709
 710             if (SUCCEEDED(hr))
 711                 hr = IMemAllocator_Decommit(pAlloc);
 712
 713             if (pAlloc)
 714                 IMemAllocator_Release(pAlloc);
 715
 716             if (SUCCEEDED(hr))
 717                 hr = IPin_Disconnect(This->pin.pConnectedTo);
 718         }
 719         IPin_Disconnect((IPin *)This);
 720     }
 721     LeaveCriticalSection(This->pin.pCritSec);
 722
 723     return hr;
 724 }
 725
 726 HRESULT WINAPI BaseOutputPinImpl_InitAllocator(BaseOutputPin *This, IMemAllocator **pMemAlloc)
 727 {
 728     return CoCreateInstance(&CLSID_MemoryAllocator, NULL, CLSCTX_INPROC_SERVER, &IID_IMemAllocator, (LPVOID*)pMemAlloc);
 729 }
 730
 731 HRESULT WINAPI BaseOutputPinImpl_DecideAllocator(BaseOutputPin *This, IMemInputPin *pPin, IMemAllocator **pAlloc)
 732 {
 733     HRESULT hr;
 734
 735     hr = IMemInputPin_GetAllocator(pPin, pAlloc);
 736
 737     if (hr == VFW_E_NO_ALLOCATOR)
 738         /* Input pin provides no allocator, use standard memory allocator */
 739         hr = BaseOutputPinImpl_InitAllocator(This, pAlloc);
 740
 741     if (SUCCEEDED(hr))
 742     {
 743         ALLOCATOR_PROPERTIES rProps;
 744         ZeroMemory(&rProps, sizeof(ALLOCATOR_PROPERTIES));
 745
 746         IMemInputPin_GetAllocatorRequirements(pPin, &rProps);
 747         hr = This->pFuncsTable->pfnDecideBufferSize(This, *pAlloc, &rProps);
 748     }
 749
 750     if (SUCCEEDED(hr))
 751         hr = IMemInputPin_NotifyAllocator(pPin, *pAlloc, FALSE);
 752
 753     return hr;
 754 }
 755
 756 /*** The Construct functions ***/
 757
 758 /* Function called as a helper to IPin_Connect */
 759 /* specific AM_MEDIA_TYPE - it cannot be NULL */
 760 HRESULT WINAPI BaseOutputPinImpl_AttemptConnection(BasePin* iface, IPin * pReceivePin, const AM_MEDIA_TYPE * pmt)
 761 {
 762     BaseOutputPin *This = (BaseOutputPin *)iface;
 763     HRESULT hr;
 764     IMemAllocator * pMemAlloc = NULL;
 765
 766     TRACE("(%p, %p)\n", pReceivePin, pmt);
 767     dump_AM_MEDIA_TYPE(pmt);
 768
 769     /* FIXME: call queryacceptproc */
 770
 771     This->pin.pConnectedTo = pReceivePin;
 772     IPin_AddRef(pReceivePin);
 773     CopyMediaType(&This->pin.mtCurrent, pmt);
 774
 775     hr = IPin_ReceiveConnection(pReceivePin, (IPin*)iface, pmt);
 776
 777     /* get the IMemInputPin interface we will use to deliver samples to the
 778      * connected pin */
 779     if (SUCCEEDED(hr))
 780     {
 781         This->pMemInputPin = NULL;
 782         hr = IPin_QueryInterface(pReceivePin, &IID_IMemInputPin, (LPVOID)&This->pMemInputPin);
 783
 784         if (SUCCEEDED(hr))
 785         {
 786             hr = This->pFuncsTable->pfnDecideAllocator(This, This->pMemInputPin, &pMemAlloc);
 787             if (pMemAlloc)
 788                 IMemAllocator_Release(pMemAlloc);
 789         }
 790
 791         /* break connection if we couldn't get the allocator */
 792         if (FAILED(hr))
 793         {
 794             if (This->pMemInputPin)
 795                 IMemInputPin_Release(This->pMemInputPin);
 796             This->pMemInputPin = NULL;
 797
 798             IPin_Disconnect(pReceivePin);
 799         }
 800     }
 801
 802     if (FAILED(hr))
 803     {
 804         IPin_Release(This->pin.pConnectedTo);
 805         This->pin.pConnectedTo = NULL;
 806         FreeMediaType(&This->pin.mtCurrent);
 807     }
 808
 809     TRACE(" -- %x\n", hr);
 810     return hr;
 811 }
 812
 813 static HRESULT OutputPin_Init(const IPinVtbl *OutputPin_Vtbl, const PIN_INFO * pPinInfo, const BasePinFuncTable* pBaseFuncsTable, const BaseOutputPinFuncTable* pBaseOutputFuncsTable,  LPCRITICAL_SECTION pCritSec, BaseOutputPin * pPinImpl)
 814 {
 815     TRACE("\n");
 816
 817     /* Common attributes */
 818     pPinImpl->pin.lpVtbl = OutputPin_Vtbl;
 819     pPinImpl->pin.refCount = 1;
 820     pPinImpl->pin.pConnectedTo = NULL;
 821     pPinImpl->pin.pCritSec = pCritSec;
 822     pPinImpl->pin.tStart = 0;
 823     pPinImpl->pin.tStop = 0;
 824     pPinImpl->pin.dRate = 1.0;
 825     Copy_PinInfo(&pPinImpl->pin.pinInfo, pPinInfo);
 826     pPinImpl->pin.pFuncsTable = pBaseFuncsTable;
 827     ZeroMemory(&pPinImpl->pin.mtCurrent, sizeof(AM_MEDIA_TYPE));
 828
 829     /* Output pin attributes */
 830     pPinImpl->pMemInputPin = NULL;
 831     pPinImpl->pFuncsTable = pBaseOutputFuncsTable;
 832
 833     return S_OK;
 834 }
 835
 836 HRESULT WINAPI BaseOutputPin_Construct(const IPinVtbl *OutputPin_Vtbl, LONG outputpin_size, const PIN_INFO * pPinInfo, const BasePinFuncTable* pBaseFuncsTable, const BaseOutputPinFuncTable* pBaseOutputFuncsTable, LPCRITICAL_SECTION pCritSec, IPin ** ppPin)
 837 {
 838     BaseOutputPin * pPinImpl;
 839
 840     *ppPin = NULL;
 841
 842     if (pPinInfo->dir != PINDIR_OUTPUT)
 843     {
 844         ERR("Pin direction(%x) != PINDIR_OUTPUT\n", pPinInfo->dir);
 845         return E_INVALIDARG;
 846     }
 847
 848     assert(outputpin_size >= sizeof(BaseOutputPin));
 849     assert(pBaseFuncsTable->pfnAttemptConnection);
 850
 851     pPinImpl = CoTaskMemAlloc(outputpin_size);
 852
 853     if (!pPinImpl)
 854         return E_OUTOFMEMORY;
 855
 856     if (SUCCEEDED(OutputPin_Init(OutputPin_Vtbl, pPinInfo, pBaseFuncsTable, pBaseOutputFuncsTable, pCritSec, pPinImpl)))
 857     {
 858         *ppPin = (IPin *)(&pPinImpl->pin.lpVtbl);
 859         return S_OK;
 860     }
 861
 862     CoTaskMemFree(pPinImpl);
 863     return E_FAIL;
 864 }
 865
 866 /*** Input Pin implementation ***/
 867
 868 HRESULT WINAPI BaseInputPinImpl_QueryInterface(IPin * iface, REFIID riid, LPVOID * ppv)
 869 {
 870     BaseInputPin *This = (BaseInputPin *)iface;
 871
 872     TRACE("(%p)->(%s, %p)\n", iface, debugstr_guid(riid), ppv);
 873
 874     *ppv = NULL;
 875
 876     if (IsEqualIID(riid, &IID_IUnknown))
 877         *ppv = iface;
 878     else if (IsEqualIID(riid, &IID_IPin))
 879         *ppv = iface;
 880     else if (IsEqualIID(riid, &IID_IMemInputPin))
 881         *ppv = &This->lpVtblMemInput;
 882     else if (IsEqualIID(riid, &IID_IMediaSeeking))
 883     {
 884         return IBaseFilter_QueryInterface(This->pin.pinInfo.pFilter, &IID_IMediaSeeking, ppv);
 885     }
 886
 887     if (*ppv)
 888     {
 889         IUnknown_AddRef((IUnknown *)(*ppv));
 890         return S_OK;
 891     }
 892
 893     FIXME("No interface for %s!\n", debugstr_guid(riid));
 894
 895     return E_NOINTERFACE;
 896 }
 897
 898 ULONG WINAPI BaseInputPinImpl_Release(IPin * iface)
 899 {
 900     BaseInputPin *This = (BaseInputPin *)iface;
 901     ULONG refCount = InterlockedDecrement(&This->pin.refCount);
 902
 903     TRACE("(%p)->() Release from %d\n", iface, refCount + 1);
 904
 905     if (!refCount)
 906     {
 907         FreeMediaType(&This->pin.mtCurrent);
 908         if (This->pAllocator)
 909             IMemAllocator_Release(This->pAllocator);
 910         This->pAllocator = NULL;
 911         This->pin.lpVtbl = NULL;
 912         CoTaskMemFree(This);
 913         return 0;
 914     }
 915     else
 916         return refCount;
 917 }
 918
 919 HRESULT WINAPI BaseInputPinImpl_Connect(IPin * iface, IPin * pConnector, const AM_MEDIA_TYPE * pmt)
 920 {
 921     ERR("Outgoing connection on an input pin! (%p, %p)\n", pConnector, pmt);
 922
 923     return E_UNEXPECTED;
 924 }
 925
 926
 927 HRESULT WINAPI BaseInputPinImpl_ReceiveConnection(IPin * iface, IPin * pReceivePin, const AM_MEDIA_TYPE * pmt)
 928 {
 929     BaseInputPin *This = (BaseInputPin *)iface;
 930     PIN_DIRECTION pindirReceive;
 931     HRESULT hr = S_OK;
 932
 933     TRACE("(%p, %p)\n", pReceivePin, pmt);
 934     dump_AM_MEDIA_TYPE(pmt);
 935
 936     EnterCriticalSection(This->pin.pCritSec);
 937     {
 938         if (This->pin.pConnectedTo)
 939             hr = VFW_E_ALREADY_CONNECTED;
 940
 941         if (SUCCEEDED(hr) && This->pin.pFuncsTable->pfnCheckMediaType((BasePin*)This, pmt) != S_OK)
 942             hr = VFW_E_TYPE_NOT_ACCEPTED; /* FIXME: shouldn't we just map common errors onto
 943                                            * VFW_E_TYPE_NOT_ACCEPTED and pass the value on otherwise? */
 944
 945         if (SUCCEEDED(hr))
 946         {
 947             IPin_QueryDirection(pReceivePin, &pindirReceive);
 948
 949             if (pindirReceive != PINDIR_OUTPUT)
 950             {
 951                 ERR("Can't connect from non-output pin\n");
 952                 hr = VFW_E_INVALID_DIRECTION;
 953             }
 954         }
 955
 956         if (SUCCEEDED(hr))
 957         {
 958             CopyMediaType(&This->pin.mtCurrent, pmt);
 959             This->pin.pConnectedTo = pReceivePin;
 960             IPin_AddRef(pReceivePin);
 961         }
 962     }
 963     LeaveCriticalSection(This->pin.pCritSec);
 964
 965     return hr;
 966 }
 967
 968 static HRESULT deliver_endofstream(IPin* pin, LPVOID unused)
 969 {
 970     return IPin_EndOfStream( pin );
 971 }
 972
 973 HRESULT WINAPI BaseInputPinImpl_QueryAccept(IPin * iface, const AM_MEDIA_TYPE * pmt)
 974 {
 975     BaseInputPin *This = (BaseInputPin *)iface;
 976
 977     TRACE("(%p/%p)->(%p)\n", This, iface, pmt);
 978
 979     return (This->pin.pFuncsTable->pfnCheckMediaType((BasePin*)This, pmt) == S_OK ? S_OK : S_FALSE);
 980 }
 981
 982 HRESULT WINAPI BaseInputPinImpl_EndOfStream(IPin * iface)
 983 {
 984     HRESULT hr = S_OK;
 985     BaseInputPin *This = (BaseInputPin *)iface;
 986
 987     TRACE("(%p)\n", This);
 988
 989     EnterCriticalSection(This->pin.pCritSec);
 990     if (This->flushing)
 991         hr = S_FALSE;
 992     else
 993         This->end_of_stream = 1;
 994     LeaveCriticalSection(This->pin.pCritSec);
 995
 996     if (hr == S_OK)
 997         hr = SendFurther( iface, deliver_endofstream, NULL, NULL );
 998     return hr;
 999 }
1000
1001 static HRESULT deliver_beginflush(IPin* pin, LPVOID unused)
1002 {
1003     return IPin_BeginFlush( pin );
1004 }
1005
1006 HRESULT WINAPI BaseInputPinImpl_BeginFlush(IPin * iface)
1007 {
1008     BaseInputPin *This = (BaseInputPin *)iface;
1009     HRESULT hr;
1010     TRACE("() semi-stub\n");
1011
1012     EnterCriticalSection(This->pin.pCritSec);
1013     This->flushing = 1;
1014
1015     hr = SendFurther( iface, deliver_beginflush, NULL, NULL );
1016     LeaveCriticalSection(This->pin.pCritSec);
1017
1018     return hr;
1019 }
1020
1021 static HRESULT deliver_endflush(IPin* pin, LPVOID unused)
1022 {
1023     return IPin_EndFlush( pin );
1024 }
1025
1026 HRESULT WINAPI BaseInputPinImpl_EndFlush(IPin * iface)
1027 {
1028     BaseInputPin *This = (BaseInputPin *)iface;
1029     HRESULT hr;
1030     TRACE("(%p)\n", This);
1031
1032     EnterCriticalSection(This->pin.pCritSec);
1033     This->flushing = This->end_of_stream = 0;
1034
1035     hr = SendFurther( iface, deliver_endflush, NULL, NULL );
1036     LeaveCriticalSection(This->pin.pCritSec);
1037
1038     return hr;
1039 }
1040
1041 typedef struct newsegmentargs
1042 {
1043     REFERENCE_TIME tStart, tStop;
1044     double rate;
1045 } newsegmentargs;
1046
1047 static HRESULT deliver_newsegment(IPin *pin, LPVOID data)
1048 {
1049     newsegmentargs *args = data;
1050     return IPin_NewSegment(pin, args->tStart, args->tStop, args->rate);
1051 }
1052
1053 HRESULT WINAPI BaseInputPinImpl_NewSegment(IPin * iface, REFERENCE_TIME tStart, REFERENCE_TIME tStop, double dRate)
1054 {
1055     BaseInputPin *This = (BaseInputPin *)iface;
1056     newsegmentargs args;
1057
1058     TRACE("(%x%08x, %x%08x, %e)\n", (ULONG)(tStart >> 32), (ULONG)tStart, (ULONG)(tStop >> 32), (ULONG)tStop, dRate);
1059
1060     args.tStart = This->pin.tStart = tStart;
1061     args.tStop = This->pin.tStop = tStop;
1062     args.rate = This->pin.dRate = dRate;
1063
1064     return SendFurther( iface, deliver_newsegment, &args, NULL );
1065 }
1066
1067 static const IPinVtbl InputPin_Vtbl =
1068 {
1069     BaseInputPinImpl_QueryInterface,
1070     BasePinImpl_AddRef,
1071     BaseInputPinImpl_Release,
1072     BaseInputPinImpl_Connect,
1073     BaseInputPinImpl_ReceiveConnection,
1074     BasePinImpl_Disconnect,
1075     BasePinImpl_ConnectedTo,
1076     BasePinImpl_ConnectionMediaType,
1077     BasePinImpl_QueryPinInfo,
1078     BasePinImpl_QueryDirection,
1079     BasePinImpl_QueryId,
1080     BaseInputPinImpl_QueryAccept,
1081     BasePinImpl_EnumMediaTypes,
1082     BasePinImpl_QueryInternalConnections,
1083     BaseInputPinImpl_EndOfStream,
1084     BaseInputPinImpl_BeginFlush,
1085     BaseInputPinImpl_EndFlush,
1086     BaseInputPinImpl_NewSegment
1087 };
1088
1089 /*** IMemInputPin implementation ***/
1090
1091 static inline BaseInputPin *impl_from_IMemInputPin( IMemInputPin *iface )
1092 {
1093     return (BaseInputPin *)((char*)iface - FIELD_OFFSET(BaseInputPin, lpVtblMemInput));
1094 }
1095
1096 static HRESULT WINAPI MemInputPin_QueryInterface(IMemInputPin * iface, REFIID riid, LPVOID * ppv)
1097 {
1098     BaseInputPin *This = impl_from_IMemInputPin(iface);
1099
1100     return IPin_QueryInterface((IPin *)&This->pin, riid, ppv);
1101 }
1102
1103 static ULONG WINAPI MemInputPin_AddRef(IMemInputPin * iface)
1104 {
1105     BaseInputPin *This = impl_from_IMemInputPin(iface);
1106
1107     return IPin_AddRef((IPin *)&This->pin);
1108 }
1109
1110 static ULONG WINAPI MemInputPin_Release(IMemInputPin * iface)
1111 {
1112     BaseInputPin *This = impl_from_IMemInputPin(iface);
1113
1114     return IPin_Release((IPin *)&This->pin);
1115 }
1116
1117 static HRESULT WINAPI MemInputPin_GetAllocator(IMemInputPin * iface, IMemAllocator ** ppAllocator)
1118 {
1119     BaseInputPin *This = impl_from_IMemInputPin(iface);
1120
1121     TRACE("(%p/%p)->(%p)\n", This, iface, ppAllocator);
1122
1123     *ppAllocator = This->pAllocator;
1124     if (*ppAllocator)
1125         IMemAllocator_AddRef(*ppAllocator);
1126
1127     return *ppAllocator ? S_OK : VFW_E_NO_ALLOCATOR;
1128 }
1129
1130 static HRESULT WINAPI MemInputPin_NotifyAllocator(IMemInputPin * iface, IMemAllocator * pAllocator, BOOL bReadOnly)
1131 {
1132     BaseInputPin *This = impl_from_IMemInputPin(iface);
1133
1134     TRACE("(%p/%p)->(%p, %d)\n", This, iface, pAllocator, bReadOnly);
1135
1136     if (bReadOnly)
1137         FIXME("Read only flag not handled yet!\n");
1138
1139     /* FIXME: Should we release the allocator on disconnection? */
1140     if (!pAllocator)
1141     {
1142         WARN("Null allocator\n");
1143         return E_POINTER;
1144     }
1145
1146     if (This->preferred_allocator && pAllocator != This->preferred_allocator)
1147         return E_FAIL;
1148
1149     if (This->pAllocator)
1150         IMemAllocator_Release(This->pAllocator);
1151     This->pAllocator = pAllocator;
1152     if (This->pAllocator)
1153         IMemAllocator_AddRef(This->pAllocator);
1154
1155     return S_OK;
1156 }
1157
1158 static HRESULT WINAPI MemInputPin_GetAllocatorRequirements(IMemInputPin * iface, ALLOCATOR_PROPERTIES * pProps)
1159 {
1160     BaseInputPin *This = impl_from_IMemInputPin(iface);
1161
1162     TRACE("(%p/%p)->(%p)\n", This, iface, pProps);
1163
1164     /* override this method if you have any specific requirements */
1165
1166     return E_NOTIMPL;
1167 }
1168
1169 static HRESULT WINAPI MemInputPin_Receive(IMemInputPin * iface, IMediaSample * pSample)
1170 {
1171     BaseInputPin *This = impl_from_IMemInputPin(iface);
1172     HRESULT hr = S_FALSE;
1173
1174     /* this trace commented out for performance reasons */
1175     /*TRACE("(%p/%p)->(%p)\n", This, iface, pSample);*/
1176     if (This->pFuncsTable->pfnReceive)
1177         hr = This->pFuncsTable->pfnReceive(This, pSample);
1178     return hr;
1179 }
1180
1181 static HRESULT WINAPI MemInputPin_ReceiveMultiple(IMemInputPin * iface, IMediaSample ** pSamples, LONG nSamples, LONG *nSamplesProcessed)
1182 {
1183     HRESULT hr = S_OK;
1184     BaseInputPin *This = impl_from_IMemInputPin(iface);
1185
1186     TRACE("(%p/%p)->(%p, %d, %p)\n", This, iface, pSamples, nSamples, nSamplesProcessed);
1187
1188     for (*nSamplesProcessed = 0; *nSamplesProcessed < nSamples; (*nSamplesProcessed)++)
1189     {
1190         hr = IMemInputPin_Receive(iface, pSamples[*nSamplesProcessed]);
1191         if (hr != S_OK)
1192             break;
1193     }
1194
1195     return hr;
1196 }
1197
1198 static HRESULT WINAPI MemInputPin_ReceiveCanBlock(IMemInputPin * iface)
1199 {
1200     BaseInputPin *This = impl_from_IMemInputPin(iface);
1201
1202     TRACE("(%p/%p)->()\n", This, iface);
1203
1204     return S_OK;
1205 }
1206
1207 static const IMemInputPinVtbl MemInputPin_Vtbl =
1208 {
1209     MemInputPin_QueryInterface,
1210     MemInputPin_AddRef,
1211     MemInputPin_Release,
1212     MemInputPin_GetAllocator,
1213     MemInputPin_NotifyAllocator,
1214     MemInputPin_GetAllocatorRequirements,
1215     MemInputPin_Receive,
1216     MemInputPin_ReceiveMultiple,
1217     MemInputPin_ReceiveCanBlock
1218 };
1219
1220 static HRESULT InputPin_Init(const IPinVtbl *InputPin_Vtbl, const PIN_INFO * pPinInfo,
1221                              const BasePinFuncTable* pBaseFuncsTable, const BaseInputPinFuncTable* pBaseInputFuncsTable,
1222                              LPCRITICAL_SECTION pCritSec, IMemAllocator *allocator, BaseInputPin * pPinImpl)
1223 {
1224     TRACE("\n");
1225
1226     /* Common attributes */
1227     pPinImpl->pin.refCount = 1;
1228     pPinImpl->pin.pConnectedTo = NULL;
1229     pPinImpl->pin.pCritSec = pCritSec;
1230     pPinImpl->pin.tStart = 0;
1231     pPinImpl->pin.tStop = 0;
1232     pPinImpl->pin.dRate = 1.0;
1233     Copy_PinInfo(&pPinImpl->pin.pinInfo, pPinInfo);
1234     ZeroMemory(&pPinImpl->pin.mtCurrent, sizeof(AM_MEDIA_TYPE));
1235     pPinImpl->pin.pFuncsTable = pBaseFuncsTable;
1236
1237     /* Input pin attributes */
1238     pPinImpl->pFuncsTable = pBaseInputFuncsTable;
1239     pPinImpl->pAllocator = pPinImpl->preferred_allocator = allocator;
1240     if (pPinImpl->preferred_allocator)
1241         IMemAllocator_AddRef(pPinImpl->preferred_allocator);
1242     pPinImpl->pin.lpVtbl = InputPin_Vtbl;
1243     pPinImpl->lpVtblMemInput = &MemInputPin_Vtbl;
1244     pPinImpl->flushing = pPinImpl->end_of_stream = 0;
1245
1246     return S_OK;
1247 }
1248
1249 HRESULT BaseInputPin_Construct(const IPinVtbl *InputPin_Vtbl, const PIN_INFO * pPinInfo,
1250                                const BasePinFuncTable* pBaseFuncsTable, const BaseInputPinFuncTable* pBaseInputFuncsTable,
1251                                LPCRITICAL_SECTION pCritSec, IMemAllocator *allocator, IPin ** ppPin)
1252 {
1253     BaseInputPin * pPinImpl;
1254
1255     *ppPin = NULL;
1256
1257     assert(pBaseFuncsTable->pfnCheckMediaType);
1258
1259     if (pPinInfo->dir != PINDIR_INPUT)
1260     {
1261         ERR("Pin direction(%x) != PINDIR_INPUT\n", pPinInfo->dir);
1262         return E_INVALIDARG;
1263     }
1264
1265     pPinImpl = CoTaskMemAlloc(sizeof(*pPinImpl));
1266
1267     if (!pPinImpl)
1268         return E_OUTOFMEMORY;
1269
1270     if (SUCCEEDED(InputPin_Init(InputPin_Vtbl, pPinInfo, pBaseFuncsTable, pBaseInputFuncsTable, pCritSec, allocator, pPinImpl)))
1271     {
1272         *ppPin = (IPin *)pPinImpl;
1273         return S_OK;
1274     }
1275
1276     CoTaskMemFree(pPinImpl);
1277     return E_FAIL;
1278 }