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 static inline BasePin *impl_from_IPin( IPin *iface )
  41 {
  42     return CONTAINING_RECORD(iface, BasePin, IPin_iface);
  43 }
  44
  45 /** Helper function, there are a lot of places where the error code is inherited
  46  * The following rules apply:
  47  *
  48  * Return the first received error code (E_NOTIMPL is ignored)
  49  * If no errors occur: return the first received non-error-code that isn't S_OK
  50  */
  51 static HRESULT updatehres( HRESULT original, HRESULT new )
  52 {
  53     if (FAILED( original ) || new == E_NOTIMPL)
  54         return original;
  55
  56     if (FAILED( new ) || original == S_OK)
  57         return new;
  58
  59     return original;
  60 }
  61
  62 /** Sends a message from a pin further to other, similar pins
  63  * fnMiddle is called on each pin found further on the stream.
  64  * fnEnd (can be NULL) is called when the message can't be sent any further (this is a renderer or source)
  65  *
  66  * If the pin given is an input pin, the message will be sent downstream to other input pins
  67  * If the pin given is an output pin, the message will be sent upstream to other output pins
  68  */
  69 static HRESULT SendFurther( IPin *from, SendPinFunc fnMiddle, LPVOID arg, SendPinFunc fnEnd )
  70 {
  71     PIN_INFO pin_info;
  72     ULONG amount = 0;
  73     HRESULT hr = S_OK;
  74     HRESULT hr_return = S_OK;
  75     IEnumPins *enumpins = NULL;
  76     BOOL foundend = TRUE;
  77     PIN_DIRECTION from_dir;
  78
  79     IPin_QueryDirection( from, &from_dir );
  80
  81     hr = IPin_QueryInternalConnections( from, NULL, &amount );
  82     if (hr != E_NOTIMPL && amount)
  83         FIXME("Use QueryInternalConnections!\n");
  84
  85     pin_info.pFilter = NULL;
  86     hr = IPin_QueryPinInfo( from, &pin_info );
  87     if (FAILED(hr))
  88         goto out;
  89
  90     hr = IBaseFilter_EnumPins( pin_info.pFilter, &enumpins );
  91     if (FAILED(hr))
  92         goto out;
  93
  94     hr = IEnumPins_Reset( enumpins );
  95     while (hr == S_OK) {
  96         IPin *pin = NULL;
  97         hr = IEnumPins_Next( enumpins, 1, &pin, NULL );
  98         if (hr == VFW_E_ENUM_OUT_OF_SYNC)
  99         {
 100             hr = IEnumPins_Reset( enumpins );
 101             continue;
 102         }
 103         if (pin)
 104         {
 105             PIN_DIRECTION dir;
 106
 107             IPin_QueryDirection( pin, &dir );
 108             if (dir != from_dir)
 109             {
 110                 IPin *connected = NULL;
 111
 112                 foundend = FALSE;
 113                 IPin_ConnectedTo( pin, &connected );
 114                 if (connected)
 115                 {
 116                     HRESULT hr_local;
 117
 118                     hr_local = fnMiddle( connected, arg );
 119                     hr_return = updatehres( hr_return, hr_local );
 120                     IPin_Release(connected);
 121                 }
 122             }
 123             IPin_Release( pin );
 124         }
 125         else
 126         {
 127             hr = S_OK;
 128             break;
 129         }
 130     }
 131
 132     if (!foundend)
 133         hr = hr_return;
 134     else if (fnEnd) {
 135         HRESULT hr_local;
 136
 137         hr_local = fnEnd( from, arg );
 138         hr_return = updatehres( hr_return, hr_local );
 139     }
 140     IEnumPins_Release(enumpins);
 141
 142 out:
 143     if (pin_info.pFilter)
 144         IBaseFilter_Release( pin_info.pFilter );
 145     return hr;
 146 }
 147
 148 static void Copy_PinInfo(PIN_INFO * pDest, const PIN_INFO * pSrc)
 149 {
 150     /* Tempting to just do a memcpy, but the name field is
 151        128 characters long! We will probably never exceed 10
 152        most of the time, so we are better off copying
 153        each field manually */
 154     strcpyW(pDest->achName, pSrc->achName);
 155     pDest->dir = pSrc->dir;
 156     pDest->pFilter = pSrc->pFilter;
 157 }
 158
 159 static void dump_AM_MEDIA_TYPE(const AM_MEDIA_TYPE * pmt)
 160 {
 161     if (!pmt)
 162         return;
 163     TRACE("\t%s\n\t%s\n\t...\n\t%s\n", debugstr_guid(&pmt->majortype), debugstr_guid(&pmt->subtype), debugstr_guid(&pmt->formattype));
 164 }
 165
 166 static BOOL CompareMediaTypes(const AM_MEDIA_TYPE * pmt1, const AM_MEDIA_TYPE * pmt2, BOOL bWildcards)
 167 {
 168     TRACE("pmt1: ");
 169     dump_AM_MEDIA_TYPE(pmt1);
 170     TRACE("pmt2: ");
 171     dump_AM_MEDIA_TYPE(pmt2);
 172     return (((bWildcards && (IsEqualGUID(&pmt1->majortype, &GUID_NULL) || IsEqualGUID(&pmt2->majortype, &GUID_NULL))) || IsEqualGUID(&pmt1->majortype, &pmt2->majortype)) &&
 173             ((bWildcards && (IsEqualGUID(&pmt1->subtype, &GUID_NULL)   || IsEqualGUID(&pmt2->subtype, &GUID_NULL)))   || IsEqualGUID(&pmt1->subtype, &pmt2->subtype)));
 174 }
 175
 176 /*** Common Base Pin function */
 177 HRESULT WINAPI BasePinImpl_GetMediaType(BasePin *iface, int iPosition, AM_MEDIA_TYPE *pmt)
 178 {
 179     if (iPosition < 0)
 180         return E_INVALIDARG;
 181     return VFW_S_NO_MORE_ITEMS;
 182 }
 183
 184 LONG WINAPI BasePinImpl_GetMediaTypeVersion(BasePin *iface)
 185 {
 186     return 1;
 187 }
 188
 189 ULONG WINAPI BasePinImpl_AddRef(IPin * iface)
 190 {
 191     BasePin *This = impl_from_IPin(iface);
 192     ULONG refCount = InterlockedIncrement(&This->refCount);
 193
 194     TRACE("(%p)->() AddRef from %d\n", iface, refCount - 1);
 195
 196     return refCount;
 197 }
 198
 199 HRESULT WINAPI BasePinImpl_Disconnect(IPin * iface)
 200 {
 201     HRESULT hr;
 202     BasePin *This = impl_from_IPin(iface);
 203
 204     TRACE("()\n");
 205
 206     EnterCriticalSection(This->pCritSec);
 207     {
 208         if (This->pConnectedTo)
 209         {
 210             IPin_Release(This->pConnectedTo);
 211             This->pConnectedTo = NULL;
 212             FreeMediaType(&This->mtCurrent);
 213             ZeroMemory(&This->mtCurrent, sizeof(This->mtCurrent));
 214             hr = S_OK;
 215         }
 216         else
 217             hr = S_FALSE;
 218     }
 219     LeaveCriticalSection(This->pCritSec);
 220
 221     return hr;
 222 }
 223
 224 HRESULT WINAPI BasePinImpl_ConnectedTo(IPin * iface, IPin ** ppPin)
 225 {
 226     HRESULT hr;
 227     BasePin *This = impl_from_IPin(iface);
 228
 229     TRACE("(%p)\n", ppPin);
 230
 231     EnterCriticalSection(This->pCritSec);
 232     {
 233         if (This->pConnectedTo)
 234         {
 235             *ppPin = This->pConnectedTo;
 236             IPin_AddRef(*ppPin);
 237             hr = S_OK;
 238         }
 239         else
 240         {
 241             hr = VFW_E_NOT_CONNECTED;
 242             *ppPin = NULL;
 243         }
 244     }
 245     LeaveCriticalSection(This->pCritSec);
 246
 247     return hr;
 248 }
 249
 250 HRESULT WINAPI BasePinImpl_ConnectionMediaType(IPin * iface, AM_MEDIA_TYPE * pmt)
 251 {
 252     HRESULT hr;
 253     BasePin *This = impl_from_IPin(iface);
 254
 255     TRACE("(%p/%p)->(%p)\n", This, iface, pmt);
 256
 257     EnterCriticalSection(This->pCritSec);
 258     {
 259         if (This->pConnectedTo)
 260         {
 261             CopyMediaType(pmt, &This->mtCurrent);
 262             hr = S_OK;
 263         }
 264         else
 265         {
 266             ZeroMemory(pmt, sizeof(*pmt));
 267             hr = VFW_E_NOT_CONNECTED;
 268         }
 269     }
 270     LeaveCriticalSection(This->pCritSec);
 271
 272     return hr;
 273 }
 274
 275 HRESULT WINAPI BasePinImpl_QueryPinInfo(IPin * iface, PIN_INFO * pInfo)
 276 {
 277     BasePin *This = impl_from_IPin(iface);
 278
 279     TRACE("(%p/%p)->(%p)\n", This, iface, pInfo);
 280
 281     Copy_PinInfo(pInfo, &This->pinInfo);
 282     IBaseFilter_AddRef(pInfo->pFilter);
 283
 284     return S_OK;
 285 }
 286
 287 HRESULT WINAPI BasePinImpl_QueryDirection(IPin * iface, PIN_DIRECTION * pPinDir)
 288 {
 289     BasePin *This = impl_from_IPin(iface);
 290
 291     TRACE("(%p/%p)->(%p)\n", This, iface, pPinDir);
 292
 293     *pPinDir = This->pinInfo.dir;
 294
 295     return S_OK;
 296 }
 297
 298 HRESULT WINAPI BasePinImpl_QueryId(IPin * iface, LPWSTR * Id)
 299 {
 300     BasePin *This = impl_from_IPin(iface);
 301
 302     TRACE("(%p/%p)->(%p)\n", This, iface, Id);
 303
 304     *Id = CoTaskMemAlloc((strlenW(This->pinInfo.achName) + 1) * sizeof(WCHAR));
 305     if (!*Id)
 306         return E_OUTOFMEMORY;
 307
 308     strcpyW(*Id, This->pinInfo.achName);
 309
 310     return S_OK;
 311 }
 312
 313 HRESULT WINAPI BasePinImpl_QueryAccept(IPin * iface, const AM_MEDIA_TYPE * pmt)
 314 {
 315     TRACE("(%p)->(%p)\n", iface, pmt);
 316
 317     return S_OK;
 318 }
 319
 320 HRESULT WINAPI BasePinImpl_EnumMediaTypes(IPin * iface, IEnumMediaTypes ** ppEnum)
 321 {
 322     BasePin *This = impl_from_IPin(iface);
 323
 324     TRACE("(%p/%p)->(%p)\n", This, iface, ppEnum);
 325
 326     /* override this method to allow enumeration of your types */
 327
 328     return EnumMediaTypes_Construct(This, This->pFuncsTable->pfnGetMediaType, This->pFuncsTable->pfnGetMediaTypeVersion , ppEnum);
 329 }
 330
 331 HRESULT WINAPI BasePinImpl_QueryInternalConnections(IPin * iface, IPin ** apPin, ULONG * cPin)
 332 {
 333     BasePin *This = impl_from_IPin(iface);
 334
 335     TRACE("(%p/%p)->(%p, %p)\n", This, iface, apPin, cPin);
 336
 337     return E_NOTIMPL; /* to tell caller that all input pins connected to all output pins */
 338 }
 339
 340 HRESULT WINAPI BasePinImpl_NewSegment(IPin * iface, REFERENCE_TIME tStart, REFERENCE_TIME tStop, double dRate)
 341 {
 342     BasePin *This = impl_from_IPin(iface);
 343
 344     TRACE("(%x%08x, %x%08x, %e)\n", (ULONG)(tStart >> 32), (ULONG)tStart, (ULONG)(tStop >> 32), (ULONG)tStop, dRate);
 345
 346     This->tStart = tStart;
 347     This->tStop = tStop;
 348     This->dRate = dRate;
 349
 350     return S_OK;
 351 }
 352
 353 /*** OutputPin implementation ***/
 354
 355 static inline BaseOutputPin *impl_BaseOutputPin_from_IPin( IPin *iface )
 356 {
 357     return CONTAINING_RECORD(iface, BaseOutputPin, pin.IPin_iface);
 358 }
 359
 360 static inline BaseOutputPin *impl_BaseOutputPin_from_BasePin( BasePin *iface )
 361 {
 362     return CONTAINING_RECORD(iface, BaseOutputPin, pin);
 363 }
 364
 365 HRESULT WINAPI BaseOutputPinImpl_QueryInterface(IPin * iface, REFIID riid, LPVOID * ppv)
 366 {
 367     BaseOutputPin *This = impl_BaseOutputPin_from_IPin(iface);
 368
 369     TRACE("(%p/%p)->(%s, %p)\n", This, iface, debugstr_guid(riid), ppv);
 370
 371     *ppv = NULL;
 372
 373     if (IsEqualIID(riid, &IID_IUnknown))
 374         *ppv = iface;
 375     else if (IsEqualIID(riid, &IID_IPin))
 376         *ppv = iface;
 377     else if (IsEqualIID(riid, &IID_IMediaSeeking) ||
 378              IsEqualIID(riid, &IID_IQualityControl))
 379     {
 380         return IBaseFilter_QueryInterface(This->pin.pinInfo.pFilter, riid, ppv);
 381     }
 382
 383     if (*ppv)
 384     {
 385         IUnknown_AddRef((IUnknown *)(*ppv));
 386         return S_OK;
 387     }
 388
 389     FIXME("No interface for %s!\n", debugstr_guid(riid));
 390
 391     return E_NOINTERFACE;
 392 }
 393
 394 ULONG WINAPI BaseOutputPinImpl_Release(IPin * iface)
 395 {
 396     BaseOutputPin *This = impl_BaseOutputPin_from_IPin(iface);
 397     ULONG refCount = InterlockedDecrement(&This->pin.refCount);
 398
 399     TRACE("(%p)->() Release from %d\n", iface, refCount + 1);
 400
 401     if (!refCount)
 402     {
 403         BaseOutputPin_Destroy(This);
 404         return 0;
 405     }
 406     return refCount;
 407 }
 408
 409 HRESULT WINAPI BaseOutputPinImpl_Connect(IPin * iface, IPin * pReceivePin, const AM_MEDIA_TYPE * pmt)
 410 {
 411     HRESULT hr;
 412     BaseOutputPin *This = impl_BaseOutputPin_from_IPin(iface);
 413
 414     TRACE("(%p/%p)->(%p, %p)\n", This, iface, pReceivePin, pmt);
 415     dump_AM_MEDIA_TYPE(pmt);
 416
 417     if (!pReceivePin)
 418         return E_POINTER;
 419
 420     /* If we try to connect to ourselves, we will definitely deadlock.
 421      * There are other cases where we could deadlock too, but this
 422      * catches the obvious case */
 423     assert(pReceivePin != iface);
 424
 425     EnterCriticalSection(This->pin.pCritSec);
 426     {
 427         /* if we have been a specific type to connect with, then we can either connect
 428          * with that or fail. We cannot choose different AM_MEDIA_TYPE */
 429         if (pmt && !IsEqualGUID(&pmt->majortype, &GUID_NULL) && !IsEqualGUID(&pmt->subtype, &GUID_NULL))
 430             hr = This->pin.pFuncsTable->pfnAttemptConnection(&This->pin, pReceivePin, pmt);
 431         else
 432         {
 433             /* negotiate media type */
 434
 435             IEnumMediaTypes * pEnumCandidates;
 436             AM_MEDIA_TYPE * pmtCandidate = NULL; /* Candidate media type */
 437
 438             if (SUCCEEDED(hr = IPin_EnumMediaTypes(iface, &pEnumCandidates)))
 439             {
 440                 hr = VFW_E_NO_ACCEPTABLE_TYPES; /* Assume the worst, but set to S_OK if connected successfully */
 441
 442                 /* try this filter's media types first */
 443                 while (S_OK == IEnumMediaTypes_Next(pEnumCandidates, 1, &pmtCandidate, NULL))
 444                 {
 445                     assert(pmtCandidate);
 446                     dump_AM_MEDIA_TYPE(pmtCandidate);
 447                     if (!IsEqualGUID(&FORMAT_None, &pmtCandidate->formattype)
 448                         && !IsEqualGUID(&GUID_NULL, &pmtCandidate->formattype))
 449                         assert(pmtCandidate->pbFormat);
 450                     if (( !pmt || CompareMediaTypes(pmt, pmtCandidate, TRUE) ) &&
 451                         (This->pin.pFuncsTable->pfnAttemptConnection(&This->pin, pReceivePin, pmtCandidate) == S_OK))
 452                     {
 453                         hr = S_OK;
 454                         DeleteMediaType(pmtCandidate);
 455                         break;
 456                     }
 457                     DeleteMediaType(pmtCandidate);
 458                     pmtCandidate = NULL;
 459                 }
 460                 IEnumMediaTypes_Release(pEnumCandidates);
 461             }
 462
 463             /* then try receiver filter's media types */
 464             if (hr != S_OK && SUCCEEDED(hr = IPin_EnumMediaTypes(pReceivePin, &pEnumCandidates))) /* if we haven't already connected successfully */
 465             {
 466                 ULONG fetched;
 467
 468                 hr = VFW_E_NO_ACCEPTABLE_TYPES; /* Assume the worst, but set to S_OK if connected successfully */
 469
 470                 while (S_OK == IEnumMediaTypes_Next(pEnumCandidates, 1, &pmtCandidate, &fetched))
 471                 {
 472                     assert(pmtCandidate);
 473                     dump_AM_MEDIA_TYPE(pmtCandidate);
 474                     if (( !pmt || CompareMediaTypes(pmt, pmtCandidate, TRUE) ) &&
 475                         (This->pin.pFuncsTable->pfnAttemptConnection(&This->pin, pReceivePin, pmtCandidate) == S_OK))
 476                     {
 477                         hr = S_OK;
 478                         DeleteMediaType(pmtCandidate);
 479                         break;
 480                     }
 481                     DeleteMediaType(pmtCandidate);
 482                     pmtCandidate = NULL;
 483                 } /* while */
 484                 IEnumMediaTypes_Release(pEnumCandidates);
 485             } /* if not found */
 486         } /* if negotiate media type */
 487     } /* if succeeded */
 488     LeaveCriticalSection(This->pin.pCritSec);
 489
 490     TRACE(" -- %x\n", hr);
 491     return hr;
 492 }
 493
 494 HRESULT WINAPI BaseOutputPinImpl_ReceiveConnection(IPin * iface, IPin * pReceivePin, const AM_MEDIA_TYPE * pmt)
 495 {
 496     ERR("Incoming connection on an output pin! (%p, %p)\n", pReceivePin, pmt);
 497
 498     return E_UNEXPECTED;
 499 }
 500
 501 HRESULT WINAPI BaseOutputPinImpl_Disconnect(IPin * iface)
 502 {
 503     HRESULT hr;
 504     BaseOutputPin *This = impl_BaseOutputPin_from_IPin(iface);
 505
 506     TRACE("()\n");
 507
 508     EnterCriticalSection(This->pin.pCritSec);
 509     {
 510         if (This->pMemInputPin)
 511         {
 512             IMemInputPin_Release(This->pMemInputPin);
 513             This->pMemInputPin = NULL;
 514         }
 515         if (This->pin.pConnectedTo)
 516         {
 517             IPin_Release(This->pin.pConnectedTo);
 518             This->pin.pConnectedTo = NULL;
 519             FreeMediaType(&This->pin.mtCurrent);
 520             ZeroMemory(&This->pin.mtCurrent, sizeof(This->pin.mtCurrent));
 521             hr = S_OK;
 522         }
 523         else
 524             hr = S_FALSE;
 525     }
 526     LeaveCriticalSection(This->pin.pCritSec);
 527
 528     return hr;
 529 }
 530
 531 HRESULT WINAPI BaseOutputPinImpl_EndOfStream(IPin * iface)
 532 {
 533     TRACE("()\n");
 534
 535     /* not supposed to do anything in an output pin */
 536
 537     return E_UNEXPECTED;
 538 }
 539
 540 HRESULT WINAPI BaseOutputPinImpl_BeginFlush(IPin * iface)
 541 {
 542     TRACE("(%p)->()\n", iface);
 543
 544     /* not supposed to do anything in an output pin */
 545
 546     return E_UNEXPECTED;
 547 }
 548
 549 HRESULT WINAPI BaseOutputPinImpl_EndFlush(IPin * iface)
 550 {
 551     TRACE("(%p)->()\n", iface);
 552
 553     /* not supposed to do anything in an output pin */
 554
 555     return E_UNEXPECTED;
 556 }
 557
 558 static const IPinVtbl OutputPin_Vtbl =
 559 {
 560     BaseOutputPinImpl_QueryInterface,
 561     BasePinImpl_AddRef,
 562     BaseOutputPinImpl_Release,
 563     BaseOutputPinImpl_Connect,
 564     BaseOutputPinImpl_ReceiveConnection,
 565     BaseOutputPinImpl_Disconnect,
 566     BasePinImpl_ConnectedTo,
 567     BasePinImpl_ConnectionMediaType,
 568     BasePinImpl_QueryPinInfo,
 569     BasePinImpl_QueryDirection,
 570     BasePinImpl_QueryId,
 571     BasePinImpl_QueryAccept,
 572     BasePinImpl_EnumMediaTypes,
 573     BasePinImpl_QueryInternalConnections,
 574     BaseOutputPinImpl_EndOfStream,
 575     BaseOutputPinImpl_BeginFlush,
 576     BaseOutputPinImpl_EndFlush,
 577     BasePinImpl_NewSegment
 578 };
 579
 580 HRESULT WINAPI BaseOutputPinImpl_GetDeliveryBuffer(BaseOutputPin *This, IMediaSample ** ppSample, REFERENCE_TIME * tStart, REFERENCE_TIME * tStop, DWORD dwFlags)
 581 {
 582     HRESULT hr;
 583
 584     TRACE("(%p, %p, %p, %x)\n", ppSample, tStart, tStop, dwFlags);
 585
 586     if (!This->pin.pConnectedTo)
 587         hr = VFW_E_NOT_CONNECTED;
 588     else
 589     {
 590         hr = IMemAllocator_GetBuffer(This->pAllocator, ppSample, tStart, tStop, dwFlags);
 591
 592         if (SUCCEEDED(hr))
 593             hr = IMediaSample_SetTime(*ppSample, tStart, tStop);
 594     }
 595
 596     return hr;
 597 }
 598
 599 /* replaces OutputPin_SendSample */
 600 HRESULT WINAPI BaseOutputPinImpl_Deliver(BaseOutputPin *This, IMediaSample * pSample)
 601 {
 602     HRESULT hr = S_OK;
 603     IMemInputPin * pMemConnected = NULL;
 604     PIN_INFO pinInfo;
 605
 606     EnterCriticalSection(This->pin.pCritSec);
 607     {
 608         if (!This->pin.pConnectedTo || !This->pMemInputPin)
 609             hr = VFW_E_NOT_CONNECTED;
 610         else
 611         {
 612             /* we don't have the lock held when using This->pMemInputPin,
 613              * so we need to AddRef it to stop it being deleted while we are
 614              * using it. Same with its filter. */
 615             pMemConnected = This->pMemInputPin;
 616             IMemInputPin_AddRef(pMemConnected);
 617             hr = IPin_QueryPinInfo(This->pin.pConnectedTo, &pinInfo);
 618         }
 619     }
 620     LeaveCriticalSection(This->pin.pCritSec);
 621
 622     if (SUCCEEDED(hr))
 623     {
 624         /* NOTE: if we are in a critical section when Receive is called
 625          * then it causes some problems (most notably with the native Video
 626          * Renderer) if we are re-entered for whatever reason */
 627         hr = IMemInputPin_Receive(pMemConnected, pSample);
 628
 629         /* If the filter's destroyed, tell upstream to stop sending data */
 630         if(IBaseFilter_Release(pinInfo.pFilter) == 0 && SUCCEEDED(hr))
 631             hr = S_FALSE;
 632     }
 633     if (pMemConnected)
 634         IMemInputPin_Release(pMemConnected);
 635
 636     return hr;
 637 }
 638
 639 /* replaces OutputPin_CommitAllocator */
 640 HRESULT WINAPI BaseOutputPinImpl_Active(BaseOutputPin *This)
 641 {
 642     HRESULT hr = S_OK;
 643
 644     TRACE("(%p)->()\n", This);
 645
 646     EnterCriticalSection(This->pin.pCritSec);
 647     {
 648         if (!This->pin.pConnectedTo || !This->pMemInputPin)
 649             hr = VFW_E_NOT_CONNECTED;
 650         else
 651             hr = IMemAllocator_Commit(This->pAllocator);
 652     }
 653     LeaveCriticalSection(This->pin.pCritSec);
 654
 655     TRACE("--> %08x\n", hr);
 656     return hr;
 657 }
 658
 659 /* replaces OutputPin_DecommitAllocator */
 660 HRESULT WINAPI BaseOutputPinImpl_Inactive(BaseOutputPin *This)
 661 {
 662     HRESULT hr = S_OK;
 663
 664     TRACE("(%p)->()\n", This);
 665
 666     EnterCriticalSection(This->pin.pCritSec);
 667     {
 668         if (!This->pin.pConnectedTo || !This->pMemInputPin)
 669             hr = VFW_E_NOT_CONNECTED;
 670         else
 671             hr = IMemAllocator_Decommit(This->pAllocator);
 672     }
 673     LeaveCriticalSection(This->pin.pCritSec);
 674
 675     TRACE("--> %08x\n", hr);
 676     return hr;
 677 }
 678
 679 /* replaces OutputPin_DeliverDisconnect */
 680 HRESULT WINAPI BaseOutputPinImpl_BreakConnect(BaseOutputPin *This)
 681 {
 682     HRESULT hr;
 683
 684     TRACE("(%p)->()\n", This);
 685
 686     EnterCriticalSection(This->pin.pCritSec);
 687     {
 688         if (!This->pin.pConnectedTo || !This->pMemInputPin)
 689             hr = VFW_E_NOT_CONNECTED;
 690         else
 691         {
 692             hr = IMemAllocator_Decommit(This->pAllocator);
 693
 694             if (SUCCEEDED(hr))
 695                 hr = IPin_Disconnect(This->pin.pConnectedTo);
 696         }
 697         IPin_Disconnect(&This->pin.IPin_iface);
 698     }
 699     LeaveCriticalSection(This->pin.pCritSec);
 700
 701     return hr;
 702 }
 703
 704 HRESULT WINAPI BaseOutputPinImpl_InitAllocator(BaseOutputPin *This, IMemAllocator **pMemAlloc)
 705 {
 706     return CoCreateInstance(&CLSID_MemoryAllocator, NULL, CLSCTX_INPROC_SERVER, &IID_IMemAllocator, (LPVOID*)pMemAlloc);
 707 }
 708
 709 HRESULT WINAPI BaseOutputPinImpl_DecideAllocator(BaseOutputPin *This, IMemInputPin *pPin, IMemAllocator **pAlloc)
 710 {
 711     HRESULT hr;
 712
 713     hr = IMemInputPin_GetAllocator(pPin, pAlloc);
 714
 715     if (hr == VFW_E_NO_ALLOCATOR)
 716         /* Input pin provides no allocator, use standard memory allocator */
 717         hr = BaseOutputPinImpl_InitAllocator(This, pAlloc);
 718
 719     if (SUCCEEDED(hr))
 720     {
 721         ALLOCATOR_PROPERTIES rProps;
 722         ZeroMemory(&rProps, sizeof(ALLOCATOR_PROPERTIES));
 723
 724         IMemInputPin_GetAllocatorRequirements(pPin, &rProps);
 725         hr = This->pFuncsTable->pfnDecideBufferSize(This, *pAlloc, &rProps);
 726     }
 727
 728     if (SUCCEEDED(hr))
 729         hr = IMemInputPin_NotifyAllocator(pPin, *pAlloc, FALSE);
 730
 731     return hr;
 732 }
 733
 734 /*** The Construct functions ***/
 735
 736 /* Function called as a helper to IPin_Connect */
 737 /* specific AM_MEDIA_TYPE - it cannot be NULL */
 738 HRESULT WINAPI BaseOutputPinImpl_AttemptConnection(BasePin* iface, IPin * pReceivePin, const AM_MEDIA_TYPE * pmt)
 739 {
 740     BaseOutputPin *This = impl_BaseOutputPin_from_BasePin(iface);
 741     HRESULT hr;
 742     IMemAllocator * pMemAlloc = NULL;
 743
 744     TRACE("(%p, %p)\n", pReceivePin, pmt);
 745     dump_AM_MEDIA_TYPE(pmt);
 746
 747     /* FIXME: call queryacceptproc */
 748
 749     This->pin.pConnectedTo = pReceivePin;
 750     IPin_AddRef(pReceivePin);
 751     CopyMediaType(&This->pin.mtCurrent, pmt);
 752
 753     hr = IPin_ReceiveConnection(pReceivePin, &iface->IPin_iface, pmt);
 754
 755     /* get the IMemInputPin interface we will use to deliver samples to the
 756      * connected pin */
 757     if (SUCCEEDED(hr))
 758     {
 759         This->pMemInputPin = NULL;
 760         hr = IPin_QueryInterface(pReceivePin, &IID_IMemInputPin, (LPVOID)&This->pMemInputPin);
 761
 762         if (SUCCEEDED(hr))
 763         {
 764             hr = This->pFuncsTable->pfnDecideAllocator(This, This->pMemInputPin, &pMemAlloc);
 765             if (SUCCEEDED(hr))
 766                 This->pAllocator = pMemAlloc;
 767             else if (pMemAlloc)
 768                 IMemAllocator_Release(pMemAlloc);
 769         }
 770
 771         /* break connection if we couldn't get the allocator */
 772         if (FAILED(hr))
 773         {
 774             if (This->pMemInputPin)
 775                 IMemInputPin_Release(This->pMemInputPin);
 776             This->pMemInputPin = NULL;
 777
 778             IPin_Disconnect(pReceivePin);
 779         }
 780     }
 781
 782     if (FAILED(hr))
 783     {
 784         IPin_Release(This->pin.pConnectedTo);
 785         This->pin.pConnectedTo = NULL;
 786         FreeMediaType(&This->pin.mtCurrent);
 787     }
 788
 789     TRACE(" -- %x\n", hr);
 790     return hr;
 791 }
 792
 793 static HRESULT OutputPin_Init(const IPinVtbl *OutputPin_Vtbl, const PIN_INFO * pPinInfo, const BaseOutputPinFuncTable* vtbl,  LPCRITICAL_SECTION pCritSec, BaseOutputPin * pPinImpl)
 794 {
 795     TRACE("\n");
 796
 797     /* Common attributes */
 798     pPinImpl->pin.IPin_iface.lpVtbl = OutputPin_Vtbl;
 799     pPinImpl->pin.refCount = 1;
 800     pPinImpl->pin.pConnectedTo = NULL;
 801     pPinImpl->pin.pCritSec = pCritSec;
 802     pPinImpl->pin.tStart = 0;
 803     pPinImpl->pin.tStop = 0;
 804     pPinImpl->pin.dRate = 1.0;
 805     Copy_PinInfo(&pPinImpl->pin.pinInfo, pPinInfo);
 806     pPinImpl->pin.pFuncsTable = &vtbl->base;
 807     ZeroMemory(&pPinImpl->pin.mtCurrent, sizeof(AM_MEDIA_TYPE));
 808
 809     /* Output pin attributes */
 810     pPinImpl->pMemInputPin = NULL;
 811     pPinImpl->pAllocator = NULL;
 812     pPinImpl->pFuncsTable = vtbl;
 813
 814     return S_OK;
 815 }
 816
 817 HRESULT WINAPI BaseOutputPin_Construct(const IPinVtbl *OutputPin_Vtbl, LONG outputpin_size, const PIN_INFO * pPinInfo, const BaseOutputPinFuncTable* vtbl, LPCRITICAL_SECTION pCritSec, IPin ** ppPin)
 818 {
 819     BaseOutputPin * pPinImpl;
 820
 821     *ppPin = NULL;
 822
 823     if (pPinInfo->dir != PINDIR_OUTPUT)
 824     {
 825         ERR("Pin direction(%x) != PINDIR_OUTPUT\n", pPinInfo->dir);
 826         return E_INVALIDARG;
 827     }
 828
 829     assert(outputpin_size >= sizeof(BaseOutputPin));
 830     assert(vtbl->base.pfnAttemptConnection);
 831
 832     pPinImpl = CoTaskMemAlloc(outputpin_size);
 833
 834     if (!pPinImpl)
 835         return E_OUTOFMEMORY;
 836
 837     if (SUCCEEDED(OutputPin_Init(OutputPin_Vtbl, pPinInfo, vtbl, pCritSec, pPinImpl)))
 838     {
 839         *ppPin = &pPinImpl->pin.IPin_iface;
 840         return S_OK;
 841     }
 842
 843     CoTaskMemFree(pPinImpl);
 844     return E_FAIL;
 845 }
 846
 847 HRESULT WINAPI BaseOutputPin_Destroy(BaseOutputPin *This)
 848 {
 849     FreeMediaType(&This->pin.mtCurrent);
 850     if (This->pAllocator)
 851         IMemAllocator_Release(This->pAllocator);
 852     This->pAllocator = NULL;
 853     CoTaskMemFree(This);
 854     return S_OK;
 855 }
 856
 857 /*** Input Pin implementation ***/
 858
 859 static inline BaseInputPin *impl_BaseInputPin_from_IPin( IPin *iface )
 860 {
 861     return CONTAINING_RECORD(iface, BaseInputPin, pin.IPin_iface);
 862 }
 863
 864 static inline BaseInputPin *impl_BaseInputPin_from_BasePin( BasePin *iface )
 865 {
 866     return CONTAINING_RECORD(iface, BaseInputPin, pin);
 867 }
 868
 869 HRESULT WINAPI BaseInputPinImpl_QueryInterface(IPin * iface, REFIID riid, LPVOID * ppv)
 870 {
 871     BaseInputPin *This = impl_BaseInputPin_from_IPin(iface);
 872
 873     TRACE("(%p)->(%s, %p)\n", iface, debugstr_guid(riid), ppv);
 874
 875     *ppv = NULL;
 876
 877     if (IsEqualIID(riid, &IID_IUnknown))
 878         *ppv = iface;
 879     else if (IsEqualIID(riid, &IID_IPin))
 880         *ppv = iface;
 881     else if (IsEqualIID(riid, &IID_IMemInputPin))
 882         *ppv = &This->IMemInputPin_iface;
 883     else if (IsEqualIID(riid, &IID_IMediaSeeking))
 884     {
 885         return IBaseFilter_QueryInterface(This->pin.pinInfo.pFilter, &IID_IMediaSeeking, ppv);
 886     }
 887
 888     if (*ppv)
 889     {
 890         IUnknown_AddRef((IUnknown *)(*ppv));
 891         return S_OK;
 892     }
 893
 894     FIXME("No interface for %s!\n", debugstr_guid(riid));
 895
 896     return E_NOINTERFACE;
 897 }
 898
 899 ULONG WINAPI BaseInputPinImpl_Release(IPin * iface)
 900 {
 901     BaseInputPin *This = impl_BaseInputPin_from_IPin(iface);
 902     ULONG refCount = InterlockedDecrement(&This->pin.refCount);
 903
 904     TRACE("(%p)->() Release from %d\n", iface, refCount + 1);
 905
 906     if (!refCount)
 907     {
 908         BaseInputPin_Destroy(This);
 909         return 0;
 910     }
 911     else
 912         return refCount;
 913 }
 914
 915 HRESULT WINAPI BaseInputPinImpl_Connect(IPin * iface, IPin * pConnector, const AM_MEDIA_TYPE * pmt)
 916 {
 917     ERR("Outgoing connection on an input pin! (%p, %p)\n", pConnector, pmt);
 918
 919     return E_UNEXPECTED;
 920 }
 921
 922
 923 HRESULT WINAPI BaseInputPinImpl_ReceiveConnection(IPin * iface, IPin * pReceivePin, const AM_MEDIA_TYPE * pmt)
 924 {
 925     BaseInputPin *This = impl_BaseInputPin_from_IPin(iface);
 926     PIN_DIRECTION pindirReceive;
 927     HRESULT hr = S_OK;
 928
 929     TRACE("(%p, %p)\n", pReceivePin, pmt);
 930     dump_AM_MEDIA_TYPE(pmt);
 931
 932     EnterCriticalSection(This->pin.pCritSec);
 933     {
 934         if (This->pin.pConnectedTo)
 935             hr = VFW_E_ALREADY_CONNECTED;
 936
 937         if (SUCCEEDED(hr) && This->pin.pFuncsTable->pfnCheckMediaType(&This->pin, pmt) != S_OK)
 938             hr = VFW_E_TYPE_NOT_ACCEPTED; /* FIXME: shouldn't we just map common errors onto
 939                                            * VFW_E_TYPE_NOT_ACCEPTED and pass the value on otherwise? */
 940
 941         if (SUCCEEDED(hr))
 942         {
 943             IPin_QueryDirection(pReceivePin, &pindirReceive);
 944
 945             if (pindirReceive != PINDIR_OUTPUT)
 946             {
 947                 ERR("Can't connect from non-output pin\n");
 948                 hr = VFW_E_INVALID_DIRECTION;
 949             }
 950         }
 951
 952         if (SUCCEEDED(hr))
 953         {
 954             CopyMediaType(&This->pin.mtCurrent, pmt);
 955             This->pin.pConnectedTo = pReceivePin;
 956             IPin_AddRef(pReceivePin);
 957         }
 958     }
 959     LeaveCriticalSection(This->pin.pCritSec);
 960
 961     return hr;
 962 }
 963
 964 static HRESULT deliver_endofstream(IPin* pin, LPVOID unused)
 965 {
 966     return IPin_EndOfStream( pin );
 967 }
 968
 969 HRESULT WINAPI BaseInputPinImpl_QueryAccept(IPin * iface, const AM_MEDIA_TYPE * pmt)
 970 {
 971     BaseInputPin *This = impl_BaseInputPin_from_IPin(iface);
 972
 973     TRACE("(%p/%p)->(%p)\n", This, iface, pmt);
 974
 975     return (This->pin.pFuncsTable->pfnCheckMediaType(&This->pin, pmt) == S_OK ? S_OK : S_FALSE);
 976 }
 977
 978 HRESULT WINAPI BaseInputPinImpl_EndOfStream(IPin * iface)
 979 {
 980     HRESULT hr = S_OK;
 981     BaseInputPin *This = impl_BaseInputPin_from_IPin(iface);
 982
 983     TRACE("(%p)\n", This);
 984
 985     EnterCriticalSection(This->pin.pCritSec);
 986     if (This->flushing)
 987         hr = S_FALSE;
 988     else
 989         This->end_of_stream = TRUE;
 990     LeaveCriticalSection(This->pin.pCritSec);
 991
 992     if (hr == S_OK)
 993         hr = SendFurther( iface, deliver_endofstream, NULL, NULL );
 994     return hr;
 995 }
 996
 997 static HRESULT deliver_beginflush(IPin* pin, LPVOID unused)
 998 {
 999     return IPin_BeginFlush( pin );
1000 }
1001
1002 HRESULT WINAPI BaseInputPinImpl_BeginFlush(IPin * iface)
1003 {
1004     BaseInputPin *This = impl_BaseInputPin_from_IPin(iface);
1005     HRESULT hr;
1006     TRACE("() semi-stub\n");
1007
1008     EnterCriticalSection(This->pin.pCritSec);
1009     This->flushing = TRUE;
1010
1011     hr = SendFurther( iface, deliver_beginflush, NULL, NULL );
1012     LeaveCriticalSection(This->pin.pCritSec);
1013
1014     return hr;
1015 }
1016
1017 static HRESULT deliver_endflush(IPin* pin, LPVOID unused)
1018 {
1019     return IPin_EndFlush( pin );
1020 }
1021
1022 HRESULT WINAPI BaseInputPinImpl_EndFlush(IPin * iface)
1023 {
1024     BaseInputPin *This = impl_BaseInputPin_from_IPin(iface);
1025     HRESULT hr;
1026     TRACE("(%p)\n", This);
1027
1028     EnterCriticalSection(This->pin.pCritSec);
1029     This->flushing = This->end_of_stream = FALSE;
1030
1031     hr = SendFurther( iface, deliver_endflush, NULL, NULL );
1032     LeaveCriticalSection(This->pin.pCritSec);
1033
1034     return hr;
1035 }
1036
1037 typedef struct newsegmentargs
1038 {
1039     REFERENCE_TIME tStart, tStop;
1040     double rate;
1041 } newsegmentargs;
1042
1043 static HRESULT deliver_newsegment(IPin *pin, LPVOID data)
1044 {
1045     newsegmentargs *args = data;
1046     return IPin_NewSegment(pin, args->tStart, args->tStop, args->rate);
1047 }
1048
1049 HRESULT WINAPI BaseInputPinImpl_NewSegment(IPin * iface, REFERENCE_TIME tStart, REFERENCE_TIME tStop, double dRate)
1050 {
1051     BaseInputPin *This = impl_BaseInputPin_from_IPin(iface);
1052     newsegmentargs args;
1053
1054     TRACE("(%x%08x, %x%08x, %e)\n", (ULONG)(tStart >> 32), (ULONG)tStart, (ULONG)(tStop >> 32), (ULONG)tStop, dRate);
1055
1056     args.tStart = This->pin.tStart = tStart;
1057     args.tStop = This->pin.tStop = tStop;
1058     args.rate = This->pin.dRate = dRate;
1059
1060     return SendFurther( iface, deliver_newsegment, &args, NULL );
1061 }
1062
1063 static const IPinVtbl InputPin_Vtbl =
1064 {
1065     BaseInputPinImpl_QueryInterface,
1066     BasePinImpl_AddRef,
1067     BaseInputPinImpl_Release,
1068     BaseInputPinImpl_Connect,
1069     BaseInputPinImpl_ReceiveConnection,
1070     BasePinImpl_Disconnect,
1071     BasePinImpl_ConnectedTo,
1072     BasePinImpl_ConnectionMediaType,
1073     BasePinImpl_QueryPinInfo,
1074     BasePinImpl_QueryDirection,
1075     BasePinImpl_QueryId,
1076     BaseInputPinImpl_QueryAccept,
1077     BasePinImpl_EnumMediaTypes,
1078     BasePinImpl_QueryInternalConnections,
1079     BaseInputPinImpl_EndOfStream,
1080     BaseInputPinImpl_BeginFlush,
1081     BaseInputPinImpl_EndFlush,
1082     BaseInputPinImpl_NewSegment
1083 };
1084
1085 /*** IMemInputPin implementation ***/
1086
1087 static inline BaseInputPin *impl_from_IMemInputPin( IMemInputPin *iface )
1088 {
1089     return CONTAINING_RECORD(iface, BaseInputPin, IMemInputPin_iface);
1090 }
1091
1092 static HRESULT WINAPI MemInputPin_QueryInterface(IMemInputPin * iface, REFIID riid, LPVOID * ppv)
1093 {
1094     BaseInputPin *This = impl_from_IMemInputPin(iface);
1095
1096     return IPin_QueryInterface(&This->pin.IPin_iface, riid, ppv);
1097 }
1098
1099 static ULONG WINAPI MemInputPin_AddRef(IMemInputPin * iface)
1100 {
1101     BaseInputPin *This = impl_from_IMemInputPin(iface);
1102
1103     return IPin_AddRef(&This->pin.IPin_iface);
1104 }
1105
1106 static ULONG WINAPI MemInputPin_Release(IMemInputPin * iface)
1107 {
1108     BaseInputPin *This = impl_from_IMemInputPin(iface);
1109
1110     return IPin_Release(&This->pin.IPin_iface);
1111 }
1112
1113 static HRESULT WINAPI MemInputPin_GetAllocator(IMemInputPin * iface, IMemAllocator ** ppAllocator)
1114 {
1115     BaseInputPin *This = impl_from_IMemInputPin(iface);
1116
1117     TRACE("(%p/%p)->(%p)\n", This, iface, ppAllocator);
1118
1119     *ppAllocator = This->pAllocator;
1120     if (*ppAllocator)
1121         IMemAllocator_AddRef(*ppAllocator);
1122
1123     return *ppAllocator ? S_OK : VFW_E_NO_ALLOCATOR;
1124 }
1125
1126 static HRESULT WINAPI MemInputPin_NotifyAllocator(IMemInputPin * iface, IMemAllocator * pAllocator, BOOL bReadOnly)
1127 {
1128     BaseInputPin *This = impl_from_IMemInputPin(iface);
1129
1130     TRACE("(%p/%p)->(%p, %d)\n", This, iface, pAllocator, bReadOnly);
1131
1132     if (bReadOnly)
1133         FIXME("Read only flag not handled yet!\n");
1134
1135     /* FIXME: Should we release the allocator on disconnection? */
1136     if (!pAllocator)
1137     {
1138         WARN("Null allocator\n");
1139         return E_POINTER;
1140     }
1141
1142     if (This->preferred_allocator && pAllocator != This->preferred_allocator)
1143         return E_FAIL;
1144
1145     if (This->pAllocator)
1146         IMemAllocator_Release(This->pAllocator);
1147     This->pAllocator = pAllocator;
1148     if (This->pAllocator)
1149         IMemAllocator_AddRef(This->pAllocator);
1150
1151     return S_OK;
1152 }
1153
1154 static HRESULT WINAPI MemInputPin_GetAllocatorRequirements(IMemInputPin * iface, ALLOCATOR_PROPERTIES * pProps)
1155 {
1156     BaseInputPin *This = impl_from_IMemInputPin(iface);
1157
1158     TRACE("(%p/%p)->(%p)\n", This, iface, pProps);
1159
1160     /* override this method if you have any specific requirements */
1161
1162     return E_NOTIMPL;
1163 }
1164
1165 static HRESULT WINAPI MemInputPin_Receive(IMemInputPin * iface, IMediaSample * pSample)
1166 {
1167     BaseInputPin *This = impl_from_IMemInputPin(iface);
1168     HRESULT hr = S_FALSE;
1169
1170     /* this trace commented out for performance reasons */
1171     /*TRACE("(%p/%p)->(%p)\n", This, iface, pSample);*/
1172     if (This->pFuncsTable->pfnReceive)
1173         hr = This->pFuncsTable->pfnReceive(This, pSample);
1174     return hr;
1175 }
1176
1177 static HRESULT WINAPI MemInputPin_ReceiveMultiple(IMemInputPin * iface, IMediaSample ** pSamples, LONG nSamples, LONG *nSamplesProcessed)
1178 {
1179     HRESULT hr = S_OK;
1180     BaseInputPin *This = impl_from_IMemInputPin(iface);
1181
1182     TRACE("(%p/%p)->(%p, %d, %p)\n", This, iface, pSamples, nSamples, nSamplesProcessed);
1183
1184     for (*nSamplesProcessed = 0; *nSamplesProcessed < nSamples; (*nSamplesProcessed)++)
1185     {
1186         hr = IMemInputPin_Receive(iface, pSamples[*nSamplesProcessed]);
1187         if (hr != S_OK)
1188             break;
1189     }
1190
1191     return hr;
1192 }
1193
1194 static HRESULT WINAPI MemInputPin_ReceiveCanBlock(IMemInputPin * iface)
1195 {
1196     BaseInputPin *This = impl_from_IMemInputPin(iface);
1197
1198     TRACE("(%p/%p)->()\n", This, iface);
1199
1200     return S_OK;
1201 }
1202
1203 static const IMemInputPinVtbl MemInputPin_Vtbl =
1204 {
1205     MemInputPin_QueryInterface,
1206     MemInputPin_AddRef,
1207     MemInputPin_Release,
1208     MemInputPin_GetAllocator,
1209     MemInputPin_NotifyAllocator,
1210     MemInputPin_GetAllocatorRequirements,
1211     MemInputPin_Receive,
1212     MemInputPin_ReceiveMultiple,
1213     MemInputPin_ReceiveCanBlock
1214 };
1215
1216 static HRESULT InputPin_Init(const IPinVtbl *InputPin_Vtbl, const PIN_INFO * pPinInfo,
1217                              const BaseInputPinFuncTable* vtbl,
1218                              LPCRITICAL_SECTION pCritSec, IMemAllocator *allocator, BaseInputPin * pPinImpl)
1219 {
1220     TRACE("\n");
1221
1222     /* Common attributes */
1223     pPinImpl->pin.refCount = 1;
1224     pPinImpl->pin.pConnectedTo = NULL;
1225     pPinImpl->pin.pCritSec = pCritSec;
1226     pPinImpl->pin.tStart = 0;
1227     pPinImpl->pin.tStop = 0;
1228     pPinImpl->pin.dRate = 1.0;
1229     Copy_PinInfo(&pPinImpl->pin.pinInfo, pPinInfo);
1230     ZeroMemory(&pPinImpl->pin.mtCurrent, sizeof(AM_MEDIA_TYPE));
1231     pPinImpl->pin.pFuncsTable = &vtbl->base;
1232
1233     /* Input pin attributes */
1234     pPinImpl->pFuncsTable = vtbl;
1235     pPinImpl->pAllocator = pPinImpl->preferred_allocator = allocator;
1236     if (pPinImpl->preferred_allocator)
1237         IMemAllocator_AddRef(pPinImpl->preferred_allocator);
1238     pPinImpl->pin.IPin_iface.lpVtbl = InputPin_Vtbl;
1239     pPinImpl->IMemInputPin_iface.lpVtbl = &MemInputPin_Vtbl;
1240     pPinImpl->flushing = pPinImpl->end_of_stream = FALSE;
1241
1242     return S_OK;
1243 }
1244
1245 HRESULT BaseInputPin_Construct(const IPinVtbl *InputPin_Vtbl, LONG inputpin_size, const PIN_INFO * pPinInfo,
1246                                const BaseInputPinFuncTable* vtbl,
1247                                LPCRITICAL_SECTION pCritSec, IMemAllocator *allocator, IPin ** ppPin)
1248 {
1249     BaseInputPin * pPinImpl;
1250
1251     *ppPin = NULL;
1252
1253     assert(inputpin_size >= sizeof(BaseInputPin));
1254     assert(vtbl->base.pfnCheckMediaType);
1255
1256     if (pPinInfo->dir != PINDIR_INPUT)
1257     {
1258         ERR("Pin direction(%x) != PINDIR_INPUT\n", pPinInfo->dir);
1259         return E_INVALIDARG;
1260     }
1261
1262     pPinImpl = CoTaskMemAlloc(inputpin_size);
1263
1264     if (!pPinImpl)
1265         return E_OUTOFMEMORY;
1266
1267     if (SUCCEEDED(InputPin_Init(InputPin_Vtbl, pPinInfo, vtbl, pCritSec, allocator, pPinImpl)))
1268     {
1269         *ppPin = (IPin *)pPinImpl;
1270         return S_OK;
1271     }
1272
1273     CoTaskMemFree(pPinImpl);
1274     return E_FAIL;
1275 }
1276
1277 HRESULT WINAPI BaseInputPin_Destroy(BaseInputPin *This)
1278 {
1279     FreeMediaType(&This->pin.mtCurrent);
1280     if (This->pAllocator)
1281         IMemAllocator_Release(This->pAllocator);
1282     This->pAllocator = NULL;
1283     This->pin.IPin_iface.lpVtbl = NULL;
1284     CoTaskMemFree(This);
1285     return S_OK;
1286 }