mirror of https://github.com/mpv-player/mpv
224 lines
5.7 KiB
C
224 lines
5.7 KiB
C
#include "DS_Filter.h"
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//#include "../loader/loader.h"
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#include "libwin32.h"
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//#include <string>
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#include <stdio.h>
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#include <string.h>
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#define __MODULE__ "DirectShow generic filter"
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using namespace std;
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extern "C" int STDCALL expLoadLibraryA(const char*);
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typedef long STDCALL (*GETCLASS) (const GUID*, const GUID*, void**);
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//extern "C" int STDCALL LoadLibraryA(const char*);
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//extern "C" STDCALL void* GetProcAddress(int, const char*); // STDCALL has to be first NetBSD
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//extern "C" int STDCALL FreeLibrary(int);
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DS_Filter::DS_Filter()
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{
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m_iHandle = 0;
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m_pFilter = 0;
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m_pInputPin = 0;
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m_pOutputPin = 0;
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m_pSrcFilter = 0;
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m_pParentFilter = 0;
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m_pOurInput = 0;
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m_pOurOutput = 0;
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m_pAll = 0;
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m_pImp = 0;
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m_iState = 0;
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}
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DS_Filter::~DS_Filter()
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{
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//cout << "Destruction of DS_FILTER" << endl;
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Stop();
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destroy();
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//cout << "Destruction of DS_FILTER done" << endl;
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}
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void DS_Filter::destroy()
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{
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if (m_iState == 0)
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return;
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m_iState = 0;
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if (m_pOurInput)
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m_pOurInput->vt->Release((IUnknown*)m_pOurInput);
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if (m_pInputPin)
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m_pInputPin->vt->Disconnect(m_pInputPin);
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if (m_pOutputPin)
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m_pOutputPin->vt->Disconnect(m_pOutputPin);
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if (m_pFilter)
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m_pFilter->vt->Release((IUnknown*)m_pFilter);
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if (m_pOutputPin)
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m_pOutputPin->vt->Release((IUnknown*)m_pOutputPin);
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if (m_pInputPin)
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m_pInputPin->vt->Release((IUnknown*)m_pInputPin);
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if (m_pImp)
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m_pImp->vt->Release((IUnknown*)m_pImp);
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delete m_pOurOutput;
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delete m_pParentFilter;
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delete m_pSrcFilter;
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// FIXME - we are still leaving few things allocated!
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if (m_iHandle)
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FreeLibrary(m_iHandle);
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}
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void DS_Filter::Create(const char* dllname, const GUID* id,
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AM_MEDIA_TYPE* in_fmt,
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AM_MEDIA_TYPE* out_fmt)
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{
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try
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{
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m_iHandle = expLoadLibraryA(dllname);
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if (!m_iHandle)
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{
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char e[256];
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snprintf((char *)&e[0], 256, "Could not open DirectShow DLL: %.200s", dllname);
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throw FATAL(e);
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}
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GETCLASS func = (GETCLASS)GetProcAddress(m_iHandle, "DllGetClassObject");
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if (!func)
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{
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char e[256];
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snprintf((char *)&e[0], 256, "Illegal or corrupt DirectShow DLL: %.200s", dllname);
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throw FATAL(e);
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}
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HRESULT result;
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IClassFactory* factory = 0;
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result = func(id, &IID_IClassFactory, (void**)&factory);
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if (result || !factory)
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throw FATAL("No such class object");;
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IUnknown* object = 0;
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result = factory->vt->CreateInstance(factory, 0, &IID_IUnknown, (void**)&object);
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factory->vt->Release((IUnknown*)factory);
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if (result || !object)
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throw FATAL("Class factory failure");
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result = object->vt->QueryInterface(object, &IID_IBaseFilter, (void**)&m_pFilter);
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object->vt->Release((IUnknown*)object);
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if (result || !m_pFilter)
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throw FATAL("Object does not have IBaseFilter interface");
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IEnumPins* enum_pins = 0;
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// enumerate pins
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result = m_pFilter->vt->EnumPins(m_pFilter, &enum_pins);
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if (result || !enum_pins)
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throw FATAL("Could not enumerate pins");
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IPin* array[256];
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ULONG fetched;
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enum_pins->vt->Reset(enum_pins);
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result = enum_pins->vt->Next(enum_pins, (ULONG)256, (IPin**)array, &fetched);
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Debug printf("Pins enumeration returned %ld pins, error is %x\n", fetched, (int)result);
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for (unsigned i = 0; i < fetched; i++)
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{
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int direction = -1;
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array[i]->vt->QueryDirection(array[i], (PIN_DIRECTION*)&direction);
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if (!m_pInputPin && direction == 0)
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{
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m_pInputPin = array[i];
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m_pInputPin->vt->AddRef((IUnknown*)m_pInputPin);
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}
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if (!m_pOutputPin && direction == 1)
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{
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m_pOutputPin = array[i];
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m_pOutputPin->vt->AddRef((IUnknown*)m_pOutputPin);
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}
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array[i]->vt->Release((IUnknown*)(array[i]));
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}
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if (!m_pInputPin)
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throw FATAL("Input pin not found");
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if (!m_pOutputPin)
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throw FATAL("Output pin not found");
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result = m_pInputPin->vt->QueryInterface((IUnknown*)m_pInputPin,
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&IID_IMemInputPin,
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(void**)&m_pImp);
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if (result)
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throw FATAL("Error getting IMemInputPin interface");
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m_pOurType = in_fmt;
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m_pDestType = out_fmt;
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result = m_pInputPin->vt->QueryAccept(m_pInputPin, m_pOurType);
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if (result)
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throw FATAL("Source format is not accepted");
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m_pParentFilter = new CBaseFilter2;
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m_pSrcFilter = new CBaseFilter(*m_pOurType, m_pParentFilter);
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m_pOurInput = m_pSrcFilter->GetPin();
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m_pOurInput->vt->AddRef((IUnknown*)m_pOurInput);
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result = m_pInputPin->vt->ReceiveConnection(m_pInputPin,
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m_pOurInput,
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m_pOurType);
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if (result)
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throw FATAL("Error connecting to input pin");
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m_pOurOutput = new COutputPin(*m_pDestType);
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//extern void trapbug();
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//trapbug();
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result = m_pOutputPin->vt->ReceiveConnection(m_pOutputPin,
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m_pOurOutput,
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m_pDestType);
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if (result)
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{
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//printf("Tracking ACELP %d 0%x\n", result);
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throw FATAL("Error connecting to output pin");
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}
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printf("Using DirectShow codec: %s\n", dllname);
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m_iState = 1;
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}
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catch (FatalError e)
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{
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//e.PrintAll();
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destroy();
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throw;
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}
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}
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void DS_Filter::Start()
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{
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if (m_iState != 1)
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return;
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HRESULT hr=m_pFilter->vt->Run(m_pFilter, 0);
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if (hr != 0)
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{
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Debug printf("WARNING: m_Filter->Run() failed, error code %x\n", (int)hr);
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}
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hr = m_pImp->vt->GetAllocator(m_pImp, &m_pAll);
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if (hr)
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{
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Debug printf("Error getting IMemAllocator interface %x\n", (int)hr);
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m_pImp->vt->Release((IUnknown*)m_pImp);
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return;
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}
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m_pImp->vt->NotifyAllocator(m_pImp, m_pAll, 0);
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m_iState = 2;
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}
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void DS_Filter::Stop()
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{
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if (m_iState == 2)
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{
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m_pAll->vt->Release((IUnknown*)m_pAll);
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if (m_pFilter)
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m_pFilter->vt->Stop(m_pFilter); // causes weird crash ??? FIXME
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else
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printf("m_pFilter is NULL!\n");
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m_pAll = 0;
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m_iState = 1;
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}
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}
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