#include?“camera.h“
#include?“ui_camera.h“

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

static?int?fd?=?-1;
struct?buffer
{
????void?*??start;
????size_t??length;
};

struct?buffer?*???????buffers?=?NULL;
static?unsigned?int???n_buffers?=?0;
static?unsigned?int???width?=?800;
static?unsigned?int???height?=?480;
static?char*?deviceName?=?“/dev/video0“;

char?image_buf[1536000+54];

unsigned?char?bmp_h[]?=
{
????????????????0x420x4d????????????//BM
????????????????0x420x700x170x00??//?172000+66
????????????????0x000x000x000x00
????????????????0x360x000x000x00??//bmp_data?offset
????????????????0x280x000x000x00
????????????????0x200x030x000x00???//width
????????????????0xE00x010x000x00???//hieght
????????????????0x010x00
????????????????0x200x00?????????????//32bit
????????????????0x000x000x000x00
????????????????0x000x700x170x00??//bmp_data?size
????????????????0x000x000x000x00
????????????????0x000x000x000x00
????????????????0x000x000x000x00
????????????????0x000x000x000x00
};

Camera::Camera（QWidget?*parent）?:
????QWidget（parent）
????ui（new?Ui::Camera）
{
??????ui->setupUi（this）;

??????timer?=?new?QTimer;

??????this->imageWidget?=?new?ImageWidget（this）;
??????this->imageWidget->setBackgroundRole（QPalette::Dark）;
??????this->imageWidget->setSizePolicy（QSizePolicy::Ignored?QSizePolicy::Ignored）;
??????this->imageWidget->setobjectName（QString::fromUtf8（“imageWidget“））;
??????this->imageWidget->setGeometry（QRect（5?50?491?371））;

??????connect（this->timer?SIGNAL（timeout（））?this?SLOT（up_date（）））;

??????deviceOpen（）;
??????deviceInit（）;
??????captureStart（）;
}

Camera::~Camera（）
{
??????delete?ui;
}

void?Camera::closeEvent（QCloseEvent?*event）
{
????????deviceUninit（）;
????????event->accept（）;??//exit
}

void?deviceOpen（void）
{
???????fd?=?open（deviceName?O_RDWR?|?O_NONBLOCK?0）;

???????if?（-1?==?fd）
???????{
????????????QMessageBox::about（NULL?“About“?“camera?open?error“）;
????????????exit（EXIT_FAILURE）;
???????}
}


/*??initialize?device*/

void?deviceInit（void）
{
????struct?v4l2_capability?cap;
????struct?v4l2_cropcap?cropcap;
????struct?v4l2_crop?crop;
????struct?v4l2_format?fmt;
????unsigned?int?min;

?????if?（-1?==?xioctl（fd?VIDIOC_QUERYCAP?&cap））
?????{
????????????if?（EINVAL?==?errno）
????????????{
?????????????????QMessageBox::about（NULL“Information““?no?V4L2?device“）;
?????????????????exit（EXIT_FAILURE）;
????????????}
???????????else
????????????{
?????????????????errno_exit（“VIDIOC_QUERYCAP“）;
????????????}
??????}

??????if?（!（cap.capabilities?&?V4L2_CAP_VIDEO_CAPTURE））
??????{
?????????????QMessageBox::about（NULL“Information““?no?video?capture?device“）;
?????????????exit（EXIT_FAILURE）;
??????}

??????struct?v4l2_input?input;
??????input.index?=?0;
??????if?（?ioctl（fd?VIDIOC_ENUMINPUT?&input）?!=?0）
??????{
????????????QMessageBox::about（NULL“Information““set?input?error“）;

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

?????文件??????10241??2013-07-30?14:57??Camera\camera.cpp

?????文件???????1009??2013-07-30?14:48??Camera\camera.h

?????文件????????340??2013-07-30?14:21??Camera\Camera.pro

?????文件??????44361??2013-07-31?10:40??Camera\Camera.pro.user

?????文件????????968??2013-07-13?13:33??Camera\camera.ui

?????文件????????961??2013-07-30?14:58??Camera\imagewidget.cpp

?????文件????????500??2012-05-04?20:02??Camera\imagewidget.h

?????文件????????278??2013-07-13?11:03??Camera\main.cpp

?????文件????1552031??2013-08-05?11:31??Camera\Qt4.7測試程序使用說明.pdf

?????目錄??????????0??2016-11-25?10:16??Camera

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

??????????????1610689????????????????????10