#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?

uchar?*buffer;

#define?IMAGEWIDTH?640
#define?IMAGEHEIGHT?480

#define?TRUE?1
#define?FALSE?0

#define?FILE_VIDEO1?“/dev/video1“

static?int?fd;
struct?v4l2_streamparm?setfps;
struct?v4l2_capability?cap;
struct?v4l2_fmtdesc?fmtdesc;
struct?v4l2_format?fmtfmtack;
struct?v4l2_requestbuffers?req;
struct?v4l2_buffer?buf;
enum???v4l2_buf_type?type;

int?init_v4l2（void）;
int?v4l2_grab（void）;



int?main（）
{
????????printf（“first~~\n“）;
????????if（init_v4l2（）?==?FALSE）{
????????????printf（“Init?fail~~\n“）;
????????????exit（1）;
????????}
????????printf（“second~~\n“）;
????????if（v4l2_grab（）?==?FALSE）{
????????????printf（“grab?fail~~\n“）;
????????????exit（2）;
????????}
????????buf.type?=?V4L2_BUF_TYPE_VIDEO_CAPTURE;
????????buf.memory?=?V4L2_MEMORY_MMAP;
????????printf（“third~~\n“）;
????????cvNamedWindow（“one“CV_WINDOW_AUTOSIZE）;
????????IplImage*?img;
????????CvMat?cvmat;
????????int?i?=?100;
????????double?t;
????????while（1）{
????????????????t?=?（double）cvGetTickCount（）;
????????????????ioctl（fdVIDIOC_DQBUF&buf）;
????????????????buf.index?=?0;
????????????????cvmat?=?cvMat（IMAGEHEIGHTIMAGEWIDTHCV_8UC3（void*）buffer）;//CV_8UC3
????????????????//t?=?（double）cvGetTickCount（）;
????????????????img?=?cvDecodeImage（&cvmat1）;
????????????????//t=（double）cvGetTickCount（）-t;
????????????????//printf（“used?time?is?%gms\n“（t/（cvGetTickFrequency（）*1000）））;
????????????????if（!img）????printf（“No?img\n“）;
????????????????cvShowImage（“one“img）;
????????????????cvReleaseImage（&img）;
????????????????ioctl（fdVIDIOC_QBUF&buf）;
????????????????if（（cvWaitKey（1）&255）?==?27）????exit（0）;
????????????????t=（double）cvGetTickCount（）-t;
????????????????printf（“used?time?is?%gms\n“（t/（cvGetTickFrequency（）*1000）））;
????????}

????????ioctl（fdVIDIOC_STREAMOFF&type）;
????????return?0;
}

int?init_v4l2（void）{
????????if?（（fd?=?open（FILE_VIDEO1?O_RDWR））?==?-1）{
????????????printf（“Opening?video?device?error\n“）;
????????????return?FALSE;
????????}
????????if?（ioctl（fd?VIDIOC_QUERYCAP?&cap）?==?-1）{
????????????????printf（“unable?Querying?Capabilities\n“）;
????????????????return?FALSE;
????????}
????????else
/*
????????{
????????printf（?“Driver?Caps:\n“
????????????????“??Driver:?\“%s\“\n“
????????????????“??Card:?\“%s\“\n“
????????????????“??Bus:?\“%s\“\n“
????????????????“??Version:?%d\n“
????????????????“??Capabilities:?%x\n“
????????????????cap.driver
????????????????cap.card
????????????????cap.bus_info
????????????????cap.version
????????????????cap.capabilities）;

????????}

????????if（（cap.capabilities?&?V4L2_CAP_VIDEO_CAPTURE）?==?V4L2_CAP_VIDEO_CAPTURE）{
????????????printf（“Camera?device?%s:?support?capture\n“FILE_VIDEO1）;
????????}
????????if（（cap.capabilities?&?V4L2_CAP_STREAM

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件????????248??2015-08-12?16:19??singleCamD\singleCamD.pro

?????文件??????18135??2015-08-12?20:59??singleCamD\singleCamD.pro.user

?????文件???????6306??2015-08-12?20:46??singleCamD\main.cpp

?????目錄??????????0??2015-08-12?20:59??singleCamD

-----------?---------??----------?-----??----

????????????????24689????????????????????4