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