资源简介
关于运动背景下的运动补偿程序,效果好于帧差法和普通背景建模法
代码片段和文件信息
/***************************************************
This is the main Grabber code. It builds the Direct Show graphs
and then inserts SampleGrabbers right before the renderers. It
then changes all of the renderers to NullRenderers. This code
supports any number of audio or video streams. Raw midi streams
are not supported -- I didn‘t think I should bother.
This code was intended to be used inside of a matlab interface
but can be used as a generic grabber class for anyone who needs
one.
Written by Micah Richert.
07/14/2005
**************************************************/
#include “DDGrab.h“
GUID NULLGUID = {0};
CSampleGrabberCB::CSampleGrabberCB()
{
pbFormat = NULL;
frameNr = 0;
disabled = FALSE;
}
CSampleGrabberCB::~CSampleGrabberCB()
{
if (pbFormat) free(pbFormat);
for (int f=0;fames.size();f++) if (frames[f]) free(frames[f]);
}
// Fake out any COM QI‘ing
//
STDMETHODIMP CSampleGrabberCB::QueryInterface(REFIID riid void ** ppv)
{
if (!ppv) return E_POINTER;
if( riid == IID_ISampleGrabberCB || riid == IID_IUnknown )
{
*ppv = (void *) static_cast ( this );
return NOERROR;
}
return E_NOINTERFACE;
}
// The sample grabber is calling us back on its deliver thread.
// This is NOT the main app thread!
//
STDMETHODIMP CSampleGrabberCB::BufferCB( double dblSampleTime BYTE * pBuffer long lBufferSize )
{
if (disabled) return 0;
if (!pBuffer) return E_POINTER;
frameNr++;
bool foundNr = false;
for (int i=0;iameNrs.size();i++) if (frameNrs[i] == frameNr) foundNr = true;
if (frameNrs.size() == 0 || foundNr)
{
BYTE* tmp = new BYTE[lBufferSize];
if (!tmp) return E_OUTOFMEMORY;
memcpy(tmppBufferlBufferSize);
frames.push_back(tmp);
frameBytes.push_back(lBufferSize);
}
return 0;
}
void DDGrabber::cleanUp()
{
IEnumFilters* filterList;
IbaseFilter* filt;
ULONG tmp;
int i;
for (i=0; i for (i=0; i
VideoCBs.clear();
AudioCBs.clear();
if (!FAILED(pGraphBuilder->EnumFilters(&filterList)))
{
filterList->Reset();
while (filterList->Next(1 &filt &tmp) == S_OK)
{
filt->Release();
}
filterList->Release();
}
pGraphBuilder = NULL;
}
void DDGrabber::MyFreeMediaType(AM_MEDIA_TYPE& mt)
{
if (mt.cbFormat != 0)
{
CoTaskMemFree((PVOID)mt.pbFormat);
mt.cbFormat = 0;
mt.pbFormat = NULL;
}
if (mt.pUnk != NULL)
{
// Unecessary because pUnk should not be used but safest.
mt.pUnk->Release();
mt.pUnk = NULL;
}
}
PIN_INFO DDGrabber::getPinInfo(IPin* pin)
{
PIN_INFO info = {0};
if (pin)
{
if (!FAILED(pin->QueryPinInfo(&info)))
{
info.pFilter->Release();
}
}
return info;
}
IPin* DDGrabber::getInputPin(IbaseFilter* filt)
{
IPin* pin = NULL;
IEnumPins* pinList;
ULONG tmp;
if (!filt) return NULL;
//get the input
属性 大小 日期 时间 名称
----------- --------- ---------- ----- ----
目录 0 2006-05-20 16:51 matlab视频读取
文件 15457 2005-07-14 18:01 matlab视频读取\DDGrab.cpp
文件 3205 2005-07-14 17:50 matlab视频读取\DDGrab.h
文件 4280 2005-07-14 18:35 matlab视频读取\makedll.m
文件 6511 2005-07-14 17:08 matlab视频读取\mexDDGrab.cpp
文件 36864 2005-07-14 18:41 matlab视频读取\mexDDGrab.dll
文件 5050 2005-07-27 14:05 matlab视频读取\mmread.m
----------- --------- ---------- ----- ----
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