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#include "DS_Filter.h"
#include "driver.h"
#include "com.h"
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "win32.h" // printf macro
typedef long STDCALL (*GETCLASS) (const GUID*, const GUID*, void**);
//extern "C" STDCALL void* GetProcAddress(int, const char*); // STDCALL has to be first NetBSD
static void DS_Filter_Start(DS_Filter* This)
{
HRESULT hr;
if (This->m_pAll)
return;
//Debug printf("DS_Filter_Start(%p)\n", This);
hr = This->m_pFilter->vt->Run(This->m_pFilter, 0);
if (hr != 0)
{
Debug printf("WARNING: m_Filter->Run() failed, error code %x\n", (int)hr);
}
hr = This->m_pImp->vt->GetAllocator(This->m_pImp, &This->m_pAll);
if (hr || !This->m_pAll)
{
Debug printf("WARNING: error getting IMemAllocator interface %x\n", (int)hr);
This->m_pImp->vt->Release((IUnknown*)This->m_pImp);
return;
}
This->m_pImp->vt->NotifyAllocator(This->m_pImp, This->m_pAll, 0);
}
static void DS_Filter_Stop(DS_Filter* This)
{
if (This->m_pAll)
{
//Debug printf("DS_Filter_Stop(%p)\n", This);
This->m_pFilter->vt->Stop(This->m_pFilter); // causes weird crash ??? FIXME
This->m_pAll->vt->Release((IUnknown*)This->m_pAll);
This->m_pAll = 0;
}
}
void DS_Filter_Destroy(DS_Filter* This)
{
This->Stop(This);
if (This->m_pOurInput)
This->m_pOurInput->vt->Release((IUnknown*)This->m_pOurInput);
if (This->m_pInputPin)
This->m_pInputPin->vt->Disconnect(This->m_pInputPin);
if (This->m_pOutputPin)
This->m_pOutputPin->vt->Disconnect(This->m_pOutputPin);
if (This->m_pFilter)
This->m_pFilter->vt->Release((IUnknown*)This->m_pFilter);
if (This->m_pOutputPin)
This->m_pOutputPin->vt->Release((IUnknown*)This->m_pOutputPin);
if (This->m_pInputPin)
This->m_pInputPin->vt->Release((IUnknown*)This->m_pInputPin);
if (This->m_pImp)
This->m_pImp->vt->Release((IUnknown*)This->m_pImp);
if (This->m_pOurOutput)
This->m_pOurOutput->vt->Release((IUnknown*)This->m_pOurOutput);
if (This->m_pParentFilter)
This->m_pParentFilter->vt->Release((IUnknown*)This->m_pParentFilter);
if (This->m_pSrcFilter)
This->m_pSrcFilter->vt->Release((IUnknown*)This->m_pSrcFilter);
// FIXME - we are still leaving few things allocated!
if (This->m_iHandle)
FreeLibrary(This->m_iHandle);
free(This);
CodecRelease();
}
DS_Filter* DS_FilterCreate(const char* dllname, const GUID* id,
AM_MEDIA_TYPE* in_fmt,
AM_MEDIA_TYPE* out_fmt)
{
int init = 0;
char eb[250];
const char* em = NULL;
DS_Filter* This = (DS_Filter*) malloc(sizeof(DS_Filter));
if (!This)
return NULL;
CodecAlloc();
This->m_pFilter = NULL;
This->m_pInputPin = NULL;
This->m_pOutputPin = NULL;
This->m_pSrcFilter = NULL;
This->m_pParentFilter = NULL;
This->m_pOurInput = NULL;
This->m_pOurOutput = NULL;
This->m_pAll = NULL;
This->m_pImp = NULL;
This->Start = DS_Filter_Start;
This->Stop = DS_Filter_Stop;
for (;;)
{
HRESULT result;
GETCLASS func;
struct IClassFactory* factory = NULL;
struct IUnknown* object = NULL;
IEnumPins* enum_pins = 0;
IPin* array[256];
ULONG fetched;
unsigned int i;
This->m_iHandle = LoadLibraryA(dllname);
if (!This->m_iHandle)
{
em = "could not open DirectShow DLL";
break;
}
func = (GETCLASS)GetProcAddress(This->m_iHandle, "DllGetClassObject");
if (!func)
{
em = "illegal or corrupt DirectShow DLL";
break;
}
result = func(id, &IID_IClassFactory, (void**)&factory);
if (result || !factory)
{
em = "no such class object";
break;
}
result = factory->vt->CreateInstance(factory, 0, &IID_IUnknown, (void**)&object);
factory->vt->Release((IUnknown*)factory);
if (result || !object)
{
em = "class factory failure";
break;
}
result = object->vt->QueryInterface(object, &IID_IBaseFilter, (void**)&This->m_pFilter);
object->vt->Release((IUnknown*)object);
if (result || !This->m_pFilter)
{
em = "object does not provide IBaseFilter interface";
break;
}
// enumerate pins
result = This->m_pFilter->vt->EnumPins(This->m_pFilter, &enum_pins);
if (result || !enum_pins)
{
em = "could not enumerate pins";
break;
}
enum_pins->vt->Reset(enum_pins);
result = enum_pins->vt->Next(enum_pins, (ULONG)256, (IPin**)array, &fetched);
Debug printf("Pins enumeration returned %ld pins, error is %x\n", fetched, (int)result);
for (i = 0; i < fetched; i++)
{
int direction = -1;
array[i]->vt->QueryDirection(array[i], (PIN_DIRECTION*)&direction);
if (!This->m_pInputPin && direction == 0)
{
This->m_pInputPin = array[i];
This->m_pInputPin->vt->AddRef((IUnknown*)This->m_pInputPin);
}
if (!This->m_pOutputPin && direction == 1)
{
This->m_pOutputPin = array[i];
This->m_pOutputPin->vt->AddRef((IUnknown*)This->m_pOutputPin);
}
array[i]->vt->Release((IUnknown*)(array[i]));
}
if (!This->m_pInputPin)
{
em = "could not find input pin";
break;
}
if (!This->m_pOutputPin)
{
em = "could not find output pin";
break;
}
result = This->m_pInputPin->vt->QueryInterface((IUnknown*)This->m_pInputPin,
&IID_IMemInputPin,
(void**)&This->m_pImp);
if (result)
{
em = "could not get IMemInputPin interface";
break;
}
This->m_pOurType = in_fmt;
This->m_pDestType = out_fmt;
result = This->m_pInputPin->vt->QueryAccept(This->m_pInputPin, This->m_pOurType);
if (result)
{
em = "source format is not accepted";
break;
}
This->m_pParentFilter = CBaseFilter2Create();
This->m_pSrcFilter = CBaseFilterCreate(This->m_pOurType, This->m_pParentFilter);
This->m_pOurInput = This->m_pSrcFilter->GetPin(This->m_pSrcFilter);
This->m_pOurInput->vt->AddRef((IUnknown*)This->m_pOurInput);
result = This->m_pInputPin->vt->ReceiveConnection(This->m_pInputPin,
This->m_pOurInput,
This->m_pOurType);
if (result)
{
em = "could not connect to input pin";
break;
}
This->m_pOurOutput = COutputPinCreate(This->m_pDestType);
result = This->m_pOutputPin->vt->ReceiveConnection(This->m_pOutputPin,
(IPin*) This->m_pOurOutput,
This->m_pDestType);
if (result)
{
em = "could not connect to output pin";
break;
}
init++;
break;
}
if (!init)
{
DS_Filter_Destroy(This);
printf("Warning: DS_Filter() %s. (DLL=%.200s)\n", em, dllname);
This = 0;
}
return This;
}
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