1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
/*
 * Generic Implementation of IPin Interface
 *
 * Copyright 2003 Robert Shearman
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
 */

#include "quartz_private.h"
#include "pin.h"

#include "wine/debug.h"
#include "wine/unicode.h"
#include "uuids.h"
#include "vfwmsgs.h"
#include <assert.h>

WINE_DEFAULT_DEBUG_CHANNEL(quartz);

#define ALIGNDOWN(value,boundary) ((value)/(boundary)*(boundary))
#define ALIGNUP(value,boundary) (ALIGNDOWN((value)+(boundary)-1, (boundary)))

typedef HRESULT (*SendPinFunc)( IPin *to, LPVOID arg );

/** Helper function, there are a lot of places where the error code is inherited
 * The following rules apply:
 *
 * Return the first received error code (E_NOTIMPL is ignored)
 * If no errors occur: return the first received non-error-code that isn't S_OK
 */
static HRESULT updatehres( HRESULT original, HRESULT new )
{
    if (FAILED( original ) || new == E_NOTIMPL)
        return original;

    if (FAILED( new ) || original == S_OK)
        return new;

    return original;
}

/** Sends a message from a pin further to other, similar pins
 * fnMiddle is called on each pin found further on the stream.
 * fnEnd (can be NULL) is called when the message can't be sent any further (this is a renderer or source)
 *
 * If the pin given is an input pin, the message will be sent downstream to other input pins
 * If the pin given is an output pin, the message will be sent upstream to other output pins
 */
static HRESULT SendFurther( IPin *from, SendPinFunc fnMiddle, LPVOID arg, SendPinFunc fnEnd )
{
    PIN_INFO pin_info;
    ULONG amount = 0;
    HRESULT hr = S_OK;
    HRESULT hr_return = S_OK;
    IEnumPins *enumpins = NULL;
    BOOL foundend = TRUE;
    PIN_DIRECTION from_dir;

    IPin_QueryDirection( from, &from_dir );

    hr = IPin_QueryInternalConnections( from, NULL, &amount );
    if (hr != E_NOTIMPL && amount)
        FIXME("Use QueryInternalConnections!\n");

    pin_info.pFilter = NULL;
    hr = IPin_QueryPinInfo( from, &pin_info );
    if (FAILED(hr))
        goto out;

    hr = IBaseFilter_EnumPins( pin_info.pFilter, &enumpins );
    if (FAILED(hr))
        goto out;

    hr = IEnumPins_Reset( enumpins );
    while (hr == S_OK) {
        IPin *pin = NULL;
        hr = IEnumPins_Next( enumpins, 1, &pin, NULL );
        if (hr == VFW_E_ENUM_OUT_OF_SYNC)
        {
            hr = IEnumPins_Reset( enumpins );
            continue;
        }
        if (pin)
        {
            PIN_DIRECTION dir;

            IPin_QueryDirection( pin, &dir );
            if (dir != from_dir)
            {
                IPin *connected = NULL;

                foundend = FALSE;
                IPin_ConnectedTo( pin, &connected );
                if (connected)
                {
                    HRESULT hr_local;

                    hr_local = fnMiddle( connected, arg );
                    hr_return = updatehres( hr_return, hr_local );
                    IPin_Release(connected);
                }
            }
            IPin_Release( pin );
        }
        else
        {
            hr = S_OK;
            break;
        }
    }

    if (!foundend)
        hr = hr_return;
    else if (fnEnd) {
        HRESULT hr_local;

        hr_local = fnEnd( from, arg );
        hr_return = updatehres( hr_return, hr_local );
    }

out:
    if (enumpins)
        IEnumPins_Release( enumpins );
    if (pin_info.pFilter)
        IBaseFilter_Release( pin_info.pFilter );
    return hr;
}


static void Copy_PinInfo(PIN_INFO * pDest, const PIN_INFO * pSrc)
{
    /* Tempting to just do a memcpy, but the name field is
       128 characters long! We will probably never exceed 10
       most of the time, so we are better off copying 
       each field manually */
    strcpyW(pDest->achName, pSrc->achName);
    pDest->dir = pSrc->dir;
    pDest->pFilter = pSrc->pFilter;
}

static HRESULT deliver_endofstream(IPin* pin, LPVOID unused)
{
    return IPin_EndOfStream( pin );
}

static HRESULT deliver_beginflush(IPin* pin, LPVOID unused)
{
    return IPin_BeginFlush( pin );
}

static HRESULT deliver_endflush(IPin* pin, LPVOID unused)
{
    return IPin_EndFlush( pin );
}

typedef struct newsegmentargs
{
    REFERENCE_TIME tStart, tStop;
    double rate;
} newsegmentargs;

static HRESULT deliver_newsegment(IPin *pin, LPVOID data)
{
    newsegmentargs *args = data;
    return IPin_NewSegment(pin, args->tStart, args->tStop, args->rate);
}

/*** PullPin implementation ***/

static HRESULT PullPin_Init(const IPinVtbl *PullPin_Vtbl, const PIN_INFO * pPinInfo, SAMPLEPROC_PULL pSampleProc, LPVOID pUserData,
                            QUERYACCEPTPROC pQueryAccept, CLEANUPPROC pCleanUp, REQUESTPROC pCustomRequest, STOPPROCESSPROC pDone, LPCRITICAL_SECTION pCritSec, PullPin * pPinImpl)
{
    /* Common attributes */
    pPinImpl->pin.IPin_iface.lpVtbl = PullPin_Vtbl;
    pPinImpl->pin.refCount = 1;
    pPinImpl->pin.pConnectedTo = NULL;
    pPinImpl->pin.pCritSec = pCritSec;
    Copy_PinInfo(&pPinImpl->pin.pinInfo, pPinInfo);
    ZeroMemory(&pPinImpl->pin.mtCurrent, sizeof(AM_MEDIA_TYPE));

    /* Input pin attributes */
    pPinImpl->pUserData = pUserData;
    pPinImpl->fnQueryAccept = pQueryAccept;
    pPinImpl->fnSampleProc = pSampleProc;
    pPinImpl->fnCleanProc = pCleanUp;
    pPinImpl->fnDone = pDone;
    pPinImpl->fnPreConnect = NULL;
    pPinImpl->pAlloc = NULL;
    pPinImpl->prefAlloc = NULL;
    pPinImpl->pReader = NULL;
    pPinImpl->hThread = NULL;
    pPinImpl->hEventStateChanged = CreateEventW(NULL, TRUE, TRUE, NULL);
    pPinImpl->thread_sleepy = CreateEventW(NULL, FALSE, FALSE, NULL);

    pPinImpl->rtStart = 0;
    pPinImpl->rtCurrent = 0;
    pPinImpl->rtStop = ((LONGLONG)0x7fffffff << 32) | 0xffffffff;
    pPinImpl->dRate = 1.0;
    pPinImpl->state = Req_Die;
    pPinImpl->fnCustomRequest = pCustomRequest;
    pPinImpl->stop_playback = TRUE;

    InitializeCriticalSection(&pPinImpl->thread_lock);
    pPinImpl->thread_lock.DebugInfo->Spare[0] = (DWORD_PTR)( __FILE__ ": PullPin.thread_lock");

    return S_OK;
}

HRESULT PullPin_Construct(const IPinVtbl *PullPin_Vtbl, const PIN_INFO * pPinInfo,
                          SAMPLEPROC_PULL pSampleProc, LPVOID pUserData, QUERYACCEPTPROC pQueryAccept,
                          CLEANUPPROC pCleanUp, REQUESTPROC pCustomRequest, STOPPROCESSPROC pDone,
                          LPCRITICAL_SECTION pCritSec, IPin ** ppPin)
{
    PullPin * pPinImpl;

    *ppPin = NULL;

    if (pPinInfo->dir != PINDIR_INPUT)
    {
        ERR("Pin direction(%x) != PINDIR_INPUT\n", pPinInfo->dir);
        return E_INVALIDARG;
    }

    pPinImpl = CoTaskMemAlloc(sizeof(*pPinImpl));

    if (!pPinImpl)
        return E_OUTOFMEMORY;

    if (SUCCEEDED(PullPin_Init(PullPin_Vtbl, pPinInfo, pSampleProc, pUserData, pQueryAccept, pCleanUp, pCustomRequest, pDone, pCritSec, pPinImpl)))
    {
        *ppPin = &pPinImpl->pin.IPin_iface;
        return S_OK;
    }

    CoTaskMemFree(pPinImpl);
    return E_FAIL;
}

static HRESULT PullPin_InitProcessing(PullPin * This);

HRESULT WINAPI PullPin_ReceiveConnection(IPin * iface, IPin * pReceivePin, const AM_MEDIA_TYPE * pmt)
{
    PIN_DIRECTION pindirReceive;
    HRESULT hr = S_OK;
    PullPin *This = impl_PullPin_from_IPin(iface);

    TRACE("(%p/%p)->(%p, %p)\n", This, iface, pReceivePin, pmt);
    dump_AM_MEDIA_TYPE(pmt);

    EnterCriticalSection(This->pin.pCritSec);
    if (!This->pin.pConnectedTo)
    {
        ALLOCATOR_PROPERTIES props;

        props.cBuffers = 3;
        props.cbBuffer = 64 * 1024; /* 64 KB */
        props.cbAlign = 1;
        props.cbPrefix = 0;

        if (This->fnQueryAccept(This->pUserData, pmt) != S_OK)
            hr = VFW_E_TYPE_NOT_ACCEPTED; /* FIXME: shouldn't we just map common errors onto 
                                           * VFW_E_TYPE_NOT_ACCEPTED and pass the value on otherwise? */

        if (SUCCEEDED(hr))
        {
            IPin_QueryDirection(pReceivePin, &pindirReceive);

            if (pindirReceive != PINDIR_OUTPUT)
            {
                ERR("Can't connect from non-output pin\n");
                hr = VFW_E_INVALID_DIRECTION;
            }
        }

        This->pReader = NULL;
        This->pAlloc = NULL;
        This->prefAlloc = NULL;
        if (SUCCEEDED(hr))
        {
            hr = IPin_QueryInterface(pReceivePin, &IID_IAsyncReader, (LPVOID *)&This->pReader);
        }

        if (SUCCEEDED(hr) && This->fnPreConnect)
        {
            hr = This->fnPreConnect(iface, pReceivePin, &props);
        }

        /*
         * Some custom filters (such as the one used by Fallout 3
         * and Fallout: New Vegas) expect to be passed a non-NULL
         * preferred allocator.
         */
        if (SUCCEEDED(hr))
        {
            hr = StdMemAllocator_create(NULL, (LPVOID *) &This->prefAlloc);
        }

        if (SUCCEEDED(hr))
        {
            hr = IAsyncReader_RequestAllocator(This->pReader, This->prefAlloc, &props, &This->pAlloc);
        }

        if (SUCCEEDED(hr))
        {
            CopyMediaType(&This->pin.mtCurrent, pmt);
            This->pin.pConnectedTo = pReceivePin;
            IPin_AddRef(pReceivePin);
            hr = IMemAllocator_Commit(This->pAlloc);
        }

        if (SUCCEEDED(hr))
            hr = PullPin_InitProcessing(This);

        if (FAILED(hr))
        {
             if (This->pReader)
                 IAsyncReader_Release(This->pReader);
             This->pReader = NULL;
             if (This->prefAlloc)
                 IMemAllocator_Release(This->prefAlloc);
             This->prefAlloc = NULL;
             if (This->pAlloc)
                 IMemAllocator_Release(This->pAlloc);
             This->pAlloc = NULL;
        }
    }
    else
        hr = VFW_E_ALREADY_CONNECTED;
    LeaveCriticalSection(This->pin.pCritSec);
    return hr;
}

HRESULT WINAPI PullPin_QueryInterface(IPin * iface, REFIID riid, LPVOID * ppv)
{
    PullPin *This = impl_PullPin_from_IPin(iface);

    TRACE("(%p/%p)->(%s, %p)\n", This, iface, qzdebugstr_guid(riid), ppv);

    *ppv = NULL;

    if (IsEqualIID(riid, &IID_IUnknown))
        *ppv = iface;
    else if (IsEqualIID(riid, &IID_IPin))
        *ppv = iface;
    else if (IsEqualIID(riid, &IID_IMediaSeeking) ||
             IsEqualIID(riid, &IID_IQualityControl))
    {
        return IBaseFilter_QueryInterface(This->pin.pinInfo.pFilter, riid, ppv);
    }

    if (*ppv)
    {
        IUnknown_AddRef((IUnknown *)(*ppv));
        return S_OK;
    }

    FIXME("No interface for %s!\n", qzdebugstr_guid(riid));

    return E_NOINTERFACE;
}

ULONG WINAPI PullPin_Release(IPin *iface)
{
    PullPin *This = impl_PullPin_from_IPin(iface);
    ULONG refCount = InterlockedDecrement(&This->pin.refCount);

    TRACE("(%p)->() Release from %d\n", This, refCount + 1);

    if (!refCount)
    {
        WaitForSingleObject(This->hEventStateChanged, INFINITE);
        assert(!This->hThread);

        if(This->prefAlloc)
            IMemAllocator_Release(This->prefAlloc);
        if(This->pAlloc)
            IMemAllocator_Release(This->pAlloc);
        if(This->pReader)
            IAsyncReader_Release(This->pReader);
        CloseHandle(This->thread_sleepy);
        CloseHandle(This->hEventStateChanged);
        This->thread_lock.DebugInfo->Spare[0] = 0;
        DeleteCriticalSection(&This->thread_lock);
        CoTaskMemFree(This);
        return 0;
    }
    return refCount;
}

static void PullPin_Flush(PullPin *This)
{
    IMediaSample *pSample;
    TRACE("Flushing!\n");

    if (This->pReader)
    {
        /* Do not allow state to change while flushing */
        EnterCriticalSection(This->pin.pCritSec);

        /* Flush outstanding samples */
        IAsyncReader_BeginFlush(This->pReader);

        for (;;)
        {
            DWORD_PTR dwUser;

            pSample = NULL;
            IAsyncReader_WaitForNext(This->pReader, 0, &pSample, &dwUser);

            if (!pSample)
                break;

            assert(!IMediaSample_GetActualDataLength(pSample));

            IMediaSample_Release(pSample);
        }

        IAsyncReader_EndFlush(This->pReader);

        LeaveCriticalSection(This->pin.pCritSec);
    }
}

static void PullPin_Thread_Process(PullPin *This)
{
    HRESULT hr;
    IMediaSample * pSample = NULL;
    ALLOCATOR_PROPERTIES allocProps;

    hr = IMemAllocator_GetProperties(This->pAlloc, &allocProps);<--- hr is assigned

    This->cbAlign = allocProps.cbAlign;

    if (This->rtCurrent < This->rtStart)
        This->rtCurrent = MEDIATIME_FROM_BYTES(ALIGNDOWN(BYTES_FROM_MEDIATIME(This->rtStart), This->cbAlign));

    TRACE("Start\n");

    if (This->rtCurrent >= This->rtStop)
    {
        IPin_EndOfStream(&This->pin.IPin_iface);
        return;
    }

    /* There is no sample in our buffer */
    hr = This->fnCustomRequest(This->pUserData);<--- hr is overwritten

    if (FAILED(hr))
        ERR("Request error: %x\n", hr);

    EnterCriticalSection(This->pin.pCritSec);
    SetEvent(This->hEventStateChanged);
    LeaveCriticalSection(This->pin.pCritSec);

    if (SUCCEEDED(hr))
    do
    {
        DWORD_PTR dwUser;

        TRACE("Process sample\n");

        pSample = NULL;
        hr = IAsyncReader_WaitForNext(This->pReader, 10000, &pSample, &dwUser);

        /* Return an empty sample on error to the implementation in case it does custom parsing, so it knows it's gone */
        if (SUCCEEDED(hr))
        {
            hr = This->fnSampleProc(This->pUserData, pSample, dwUser);
        }
        else
        {
            if (hr == VFW_E_TIMEOUT)
            {
                if (pSample != NULL)
                    WARN("Non-NULL sample returned with VFW_E_TIMEOUT.\n");
                hr = S_OK;
            }
            /* FIXME: Errors are not well handled yet! */
            else
                ERR("Processing error: %x\n", hr);
        }

        if (pSample)
        {
            IMediaSample_Release(pSample);
            pSample = NULL;
        }
    } while (This->rtCurrent < This->rtStop && hr == S_OK && !This->stop_playback);

    /*
     * Sample was rejected, and we are asked to terminate.  When there is more than one buffer
     * it is possible for a filter to have several queued samples, making it necessary to
     * release all of these pending samples.
     */
    if (This->stop_playback || FAILED(hr))
    {
        DWORD_PTR dwUser;

        do
        {
            if (pSample)
                IMediaSample_Release(pSample);
            pSample = NULL;
            IAsyncReader_WaitForNext(This->pReader, 0, &pSample, &dwUser);
        } while(pSample);
    }

    /* Can't reset state to Sleepy here because that might race, instead PauseProcessing will do that for us
     * Flush remaining samples
     */
    if (This->fnDone)
        This->fnDone(This->pUserData);

    TRACE("End: %08x, %d\n", hr, This->stop_playback);
}

static void PullPin_Thread_Pause(PullPin *This)
{
    PullPin_Flush(This);

    EnterCriticalSection(This->pin.pCritSec);
    This->state = Req_Sleepy;
    SetEvent(This->hEventStateChanged);
    LeaveCriticalSection(This->pin.pCritSec);
}

static void  PullPin_Thread_Stop(PullPin *This)
{
    TRACE("(%p)->()\n", This);

    EnterCriticalSection(This->pin.pCritSec);
    SetEvent(This->hEventStateChanged);
    LeaveCriticalSection(This->pin.pCritSec);

    IBaseFilter_Release(This->pin.pinInfo.pFilter);

    CoUninitialize();
    ExitThread(0);
}

static DWORD WINAPI PullPin_Thread_Main(LPVOID pv)
{
    PullPin *This = pv;
    CoInitializeEx(NULL, COINIT_MULTITHREADED);

    PullPin_Flush(This);

    for (;;)
    {
        WaitForSingleObject(This->thread_sleepy, INFINITE);

        TRACE("State: %d\n", This->state);

        switch (This->state)
        {
        case Req_Die: PullPin_Thread_Stop(This); break;
        case Req_Run: PullPin_Thread_Process(This); break;
        case Req_Pause: PullPin_Thread_Pause(This); break;
        case Req_Sleepy: ERR("Should not be signalled with SLEEPY!\n"); break;
        default: ERR("Unknown state request: %d\n", This->state); break;
        }
    }
    return 0;
}

static HRESULT PullPin_InitProcessing(PullPin * This)
{
    HRESULT hr = S_OK;

    TRACE("(%p)->()\n", This);

    /* if we are connected */
    if (This->pAlloc)
    {
        DWORD dwThreadId;

        WaitForSingleObject(This->hEventStateChanged, INFINITE);
        EnterCriticalSection(This->pin.pCritSec);

        assert(!This->hThread);
        assert(This->state == Req_Die);
        assert(This->stop_playback);
        assert(WaitForSingleObject(This->thread_sleepy, 0) == WAIT_TIMEOUT);
        This->state = Req_Sleepy;

        /* AddRef the filter to make sure it and its pins will be around
         * as long as the thread */
        IBaseFilter_AddRef(This->pin.pinInfo.pFilter);


        This->hThread = CreateThread(NULL, 0, PullPin_Thread_Main, This, 0, &dwThreadId);
        if (!This->hThread)
        {
            hr = HRESULT_FROM_WIN32(GetLastError());
            IBaseFilter_Release(This->pin.pinInfo.pFilter);
        }

        if (SUCCEEDED(hr))
        {
            SetEvent(This->hEventStateChanged);
            /* If assert fails, that means a command was not processed before the thread previously terminated */
        }
        LeaveCriticalSection(This->pin.pCritSec);
    }

    TRACE(" -- %x\n", hr);

    return hr;
}

HRESULT PullPin_StartProcessing(PullPin * This)
{
    /* if we are connected */
    TRACE("(%p)->()\n", This);
    if(This->pAlloc)
    {
        assert(This->hThread);

        PullPin_WaitForStateChange(This, INFINITE);

        assert(This->state == Req_Sleepy);

        /* Wake up! */
        assert(WaitForSingleObject(This->thread_sleepy, 0) == WAIT_TIMEOUT);
        This->state = Req_Run;
        This->stop_playback = FALSE;
        ResetEvent(This->hEventStateChanged);
        SetEvent(This->thread_sleepy);
    }

    return S_OK;
}

HRESULT PullPin_PauseProcessing(PullPin * This)
{
    /* if we are connected */
    TRACE("(%p)->()\n", This);
    if(This->pAlloc)
    {
        assert(This->hThread);

        PullPin_WaitForStateChange(This, INFINITE);

        EnterCriticalSection(This->pin.pCritSec);

        assert(!This->stop_playback);
        assert(This->state == Req_Run|| This->state == Req_Sleepy);

        assert(WaitForSingleObject(This->thread_sleepy, 0) == WAIT_TIMEOUT);

        This->state = Req_Pause;
        This->stop_playback = TRUE;
        ResetEvent(This->hEventStateChanged);
        SetEvent(This->thread_sleepy);

        /* Release any outstanding samples */
        if (This->pReader)
        {
            IMediaSample *pSample;
            DWORD_PTR dwUser;

            do
            {
                pSample = NULL;
                IAsyncReader_WaitForNext(This->pReader, 0, &pSample, &dwUser);
                if (pSample)
                    IMediaSample_Release(pSample);
            } while(pSample);
        }

        LeaveCriticalSection(This->pin.pCritSec);
    }

    return S_OK;
}

static HRESULT PullPin_StopProcessing(PullPin * This)
{
    TRACE("(%p)->()\n", This);

    /* if we are alive */
    assert(This->hThread);

    PullPin_WaitForStateChange(This, INFINITE);

    assert(This->state == Req_Pause || This->state == Req_Sleepy);

    This->stop_playback = TRUE;
    This->state = Req_Die;
    assert(WaitForSingleObject(This->thread_sleepy, 0) == WAIT_TIMEOUT);
    ResetEvent(This->hEventStateChanged);
    SetEvent(This->thread_sleepy);
    return S_OK;
}

HRESULT PullPin_WaitForStateChange(PullPin * This, DWORD dwMilliseconds)
{
    if (WaitForSingleObject(This->hEventStateChanged, dwMilliseconds) == WAIT_TIMEOUT)
        return S_FALSE;
    return S_OK;
}

HRESULT WINAPI PullPin_QueryAccept(IPin * iface, const AM_MEDIA_TYPE * pmt)
{
    PullPin *This = impl_PullPin_from_IPin(iface);

    TRACE("(%p/%p)->(%p)\n", This, iface, pmt);

    return (This->fnQueryAccept(This->pUserData, pmt) == S_OK ? S_OK : S_FALSE);
}

HRESULT WINAPI PullPin_EndOfStream(IPin * iface)
{
    PullPin *This = impl_PullPin_from_IPin(iface);
    HRESULT hr = S_FALSE;

    TRACE("(%p)->()\n", iface);

    EnterCriticalSection(This->pin.pCritSec);
    hr = SendFurther( iface, deliver_endofstream, NULL, NULL );
    SetEvent(This->hEventStateChanged);
    LeaveCriticalSection(This->pin.pCritSec);

    return hr;
}

HRESULT WINAPI PullPin_BeginFlush(IPin * iface)
{
    PullPin *This = impl_PullPin_from_IPin(iface);
    TRACE("(%p)->()\n", This);

    EnterCriticalSection(This->pin.pCritSec);
    {
        SendFurther( iface, deliver_beginflush, NULL, NULL );
    }
    LeaveCriticalSection(This->pin.pCritSec);

    EnterCriticalSection(&This->thread_lock);
    {
        if (This->pReader)
            IAsyncReader_BeginFlush(This->pReader);
        PullPin_WaitForStateChange(This, INFINITE);

        if (This->hThread && This->state == Req_Run)
        {
            PullPin_PauseProcessing(This);
            PullPin_WaitForStateChange(This, INFINITE);
        }
    }
    LeaveCriticalSection(&This->thread_lock);

    EnterCriticalSection(This->pin.pCritSec);
    {
        This->fnCleanProc(This->pUserData);
    }
    LeaveCriticalSection(This->pin.pCritSec);

    return S_OK;
}

HRESULT WINAPI PullPin_EndFlush(IPin * iface)
{
    PullPin *This = impl_PullPin_from_IPin(iface);

    TRACE("(%p)->()\n", iface);

    /* Send further first: Else a race condition might terminate processing early */
    EnterCriticalSection(This->pin.pCritSec);
    SendFurther( iface, deliver_endflush, NULL, NULL );
    LeaveCriticalSection(This->pin.pCritSec);

    EnterCriticalSection(&This->thread_lock);
    {
        FILTER_STATE state;

        if (This->pReader)
            IAsyncReader_EndFlush(This->pReader);

        IBaseFilter_GetState(This->pin.pinInfo.pFilter, INFINITE, &state);

        if (state != State_Stopped)
            PullPin_StartProcessing(This);

        PullPin_WaitForStateChange(This, INFINITE);
    }
    LeaveCriticalSection(&This->thread_lock);

    return S_OK;
}

HRESULT WINAPI PullPin_Disconnect(IPin *iface)
{
    HRESULT hr;
    PullPin *This = impl_PullPin_from_IPin(iface);

    TRACE("()\n");

    EnterCriticalSection(This->pin.pCritSec);
    {
        if (FAILED(hr = IMemAllocator_Decommit(This->pAlloc)))
            ERR("Allocator decommit failed with error %x. Possible memory leak\n", hr);

        if (This->pin.pConnectedTo)
        {
            IPin_Release(This->pin.pConnectedTo);
            This->pin.pConnectedTo = NULL;
            PullPin_StopProcessing(This);

            FreeMediaType(&This->pin.mtCurrent);
            ZeroMemory(&This->pin.mtCurrent, sizeof(This->pin.mtCurrent));
            hr = S_OK;
        }
        else
            hr = S_FALSE;
    }
    LeaveCriticalSection(This->pin.pCritSec);

    WaitForSingleObject(This->hThread, INFINITE);
    CloseHandle(This->hThread);
    This->hThread = NULL;

    return hr;
}

HRESULT WINAPI PullPin_NewSegment(IPin * iface, REFERENCE_TIME tStart, REFERENCE_TIME tStop, double dRate)
{
    newsegmentargs args;
    FIXME("(%p)->(%s, %s, %g) stub\n", iface, wine_dbgstr_longlong(tStart), wine_dbgstr_longlong(tStop), dRate);

    args.tStart = tStart;
    args.tStop = tStop;
    args.rate = dRate;

    return SendFurther( iface, deliver_newsegment, &args, NULL );
}