opencv+directshow同步打开4个摄像头

opencv+directshow+mfc同步打开4个摄像头

//////////////////////////////////////////////////////////////////////
// Video Capture using DirectShow
// Author: Shiqi Yu （shiqi.yu@gmail.com）
// Thanks to:
//		HardyAI@OpenCV China
//		flymanbox@OpenCV China （for his contribution to function CameraName and frame width/height setting）
// Last modification: April 9 2009
//////////////////////////////////////////////////////////////////////


//////////////////////////////////////////////////////////////////////
// 使用说明：
//   1. 将CameraDS.h CameraDS.cpp以及目录DirectShow复制到你的项目中
//   2. 菜单 Project->Settings->Settings for:（All configurations）->C/C++->Category（Preprocessor）->Additional include directories
//      设置为 DirectShow/Include
//   3. 菜单 Project->Settings->Settings for:（All configurations）->link->Category（Input）->Additional library directories
//      设置为 DirectShow/Lib
//////////////////////////////////////////////////////////////////////

// CameraDS.cpp: implementation of the CCameraDS class.
//
//////////////////////////////////////////////////////////////////////
#include“stdafx.h“
#include “CameraDS.h“

#pragma comment（lib“Strmiids.lib“） 
//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

CCameraDS::CCameraDS（）
{
	m_bConnected = m_bLock = m_bChanged = false;
	m_nWidth = m_nHeight = 0;
	m_nBufferSize = 0;

	m_pframe = NULL;

	m_pNullFilter = NULL;
	m_pMediaEvent = NULL;
	m_pSampleGrabberFilter = NULL;
	m_pGraph = NULL;

	CoInitialize（NULL）;
}

CCameraDS::~CCameraDS（）
{
	CloseCamera（）;
	CoUninitialize（）;
}

void CCameraDS::CloseCamera（）
{
	if（m_bConnected）
	{
		m_pMediaControl->Stop（）;
	}

	m_pGraph = NULL;
	m_pDeviceFilter = NULL;
	m_pMediaControl = NULL;
	m_pSampleGrabberFilter = NULL;
	m_pSampleGrabber = NULL;
	m_pGrabberInput = NULL;
	m_pGrabberOutput = NULL;
	m_pCameraOutput = NULL;
	m_pMediaEvent = NULL;
	m_pNullFilter = NULL;
	m_pNullInputPin = NULL;

	if （m_pframe）
	{
		cvReleaseImage（&m_pframe）;
	}

	m_bConnected = m_bLock = m_bChanged = false;
	m_nWidth = m_nHeight = 0;
	m_nBufferSize = 0;
}

bool CCameraDS::OpenCamera（int nCamID bool bDisplayProperties int nWidth int nHeight）
{
	HRESULT hr = S_OK;

	CoInitialize（NULL）;
	// Create the Filter Graph Manager.
	hr = CoCreateInstance（CLSID_FilterGraph NULL CLSCTX_INPROC IID_IGraphBuilder （void **）&m_pGraph）;

	hr = CoCreateInstance（CLSID_SampleGrabber NULL CLSCTX_INPROC_SERVER IID_IbaseFilter （LPVOID *）&m_pSampleGrabberFilter）;

	hr = m_pGraph->QueryInterface（IID_IMediaControl （void **） &m_pMediaControl）;
	hr = m_pGraph->QueryInterface（IID_IMediaEvent （void **） &m_pMediaEvent）;

	hr = CoCreateInstance（CLSID_NullRenderer NULL CLSCTX_INPROC_SERVER IID_IbaseFilter （LPVOID*） &m_pNullFilter）;

	hr = m_pGraph->AddFilter（m_pNullFilter L“NullRenderer“）;

	hr = m_pSampleGrabberFilter->QueryInterface（IID_ISam

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----

     文件    2457600  2016-12-31 11:06  Directshow_4Camera\combase.pdb\A9819D7C64B44CA687E15F11AFE004F41\download.error

     文件     268800  2016-12-31 11:16  Directshow_4Camera\Debug\Directshow_4Camera.exe

     文件    1904984  2016-12-31 11:16  Directshow_4Camera\Debug\Directshow_4Camera.ilk

     文件    9129984  2016-12-31 11:16  Directshow_4Camera\Debug\Directshow_4Camera.pdb

     文件      11416  2016-12-30 22:18  Directshow_4Camera\Directshow_4Camera\CameraDS.cpp

     文件       3097  2010-11-16 17:20  Directshow_4Camera\Directshow_4Camera\CameraDS.h

     文件       6960  2012-03-14 16:52  Directshow_4Camera\Directshow_4Camera\CvvImage.cpp

     文件       1957  2016-11-26 17:01  Directshow_4Camera\Directshow_4Camera\CvvImage.h

     文件     332161  2016-12-31 10:49  Directshow_4Camera\Directshow_4Camera\Debug\CameraDS.obj

     文件     252225  2016-12-31 10:49  Directshow_4Camera\Directshow_4Camera\Debug\CvvImage.obj

     文件       4106  2016-12-31 11:16  Directshow_4Camera\Directshow_4Camera\Debug\Directsh.36A50D19.tlog\cl.command.1.tlog

     文件      94678  2016-12-31 11:16  Directshow_4Camera\Directshow_4Camera\Debug\Directsh.36A50D19.tlog\CL.read.1.tlog

     文件       4912  2016-12-31 11:16  Directshow_4Camera\Directshow_4Camera\Debug\Directsh.36A50D19.tlog\CL.write.1.tlog

     文件        175  2016-12-31 11:16  Directshow_4Camera\Directshow_4Camera\Debug\Directsh.36A50D19.tlog\Directshow_4Camera.lastbuildstate

     文件       2854  2016-12-31 11:16  Directshow_4Camera\Directshow_4Camera\Debug\Directsh.36A50D19.tlog\link.command.1.tlog

     文件       8162  2016-12-31 11:16  Directshow_4Camera\Directshow_4Camera\Debug\Directsh.36A50D19.tlog\link.read.1.tlog

     文件       1460  2016-12-31 11:16  Directshow_4Camera\Directshow_4Camera\Debug\Directsh.36A50D19.tlog\link.write.1.tlog

     文件        716  2016-12-31 11:16  Directshow_4Camera\Directshow_4Camera\Debug\Directsh.36A50D19.tlog\rc.command.1.tlog

     文件       3006  2016-12-31 11:16  Directshow_4Camera\Directshow_4Camera\Debug\Directsh.36A50D19.tlog\rc.read.1.tlog

     文件        354  2016-12-31 11:16  Directshow_4Camera\Directshow_4Camera\Debug\Directsh.36A50D19.tlog\rc.write.1.tlog

     文件       2139  2016-12-31 11:16  Directshow_4Camera\Directshow_4Camera\Debug\Directshow_4Camera.log

     文件      41502  2016-12-31 11:08  Directshow_4Camera\Directshow_4Camera\Debug\Directshow_4Camera.obj

     文件   43253760  2016-12-31 10:49  Directshow_4Camera\Directshow_4Camera\Debug\Directshow_4Camera.pch

     文件      70424  2016-12-31 11:16  Directshow_4Camera\Directshow_4Camera\Debug\Directshow_4Camera.res

     文件     344320  2016-12-31 11:16  Directshow_4Camera\Directshow_4Camera\Debug\Directshow_4CameraDlg.obj

     文件     905058  2016-12-31 10:49  Directshow_4Camera\Directshow_4Camera\Debug\stdafx.obj

     文件    3058688  2016-12-31 11:16  Directshow_4Camera\Directshow_4Camera\Debug\vc120.idb

     文件    8474624  2016-12-31 11:16  Directshow_4Camera\Directshow_4Camera\Debug\vc120.pdb

     文件     196608  2006-02-28 18:04  Directshow_4Camera\Directshow_4Camera\DirectShow\bin\libguide40.dll

     文件      11687  2010-05-31 09:25  Directshow_4Camera\Directshow_4Camera\DirectShow\CameraDS.cpp

............此处省略191个文件信息