资源简介
基于QT开发的V4L2摄像头视频采集,并使用QLable实现摄像头图像的刷新显示。
代码片段和文件信息
#include “imagecamera.h“
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#define log_debug qDebug
void yuyv_to_rgb888(unsigned char* yuvunsigned char* rgb int imgWidth int imgHeight)
{
unsigned int i;
unsigned char* y0 = yuv + 0;
unsigned char* u0 = yuv + 1;
unsigned char* y1 = yuv + 2;
unsigned char* v0 = yuv + 3;
unsigned char* r0 = rgb + 0;
unsigned char* g0 = rgb + 1;
unsigned char* b0 = rgb + 2;
unsigned char* r1 = rgb + 3;
unsigned char* g1 = rgb + 4;
unsigned char* b1 = rgb + 5;
//DBG(“yuyv_to_rgb start\n“);
float rt0 = 0 gt0 = 0 bt0 = 0 rt1 = 0 gt1 = 0 bt1 = 0;
for(i = 0; i <= (imgWidth * imgHeight) / 2 ;i++)
{
bt0 = 1.164 * (*y0 - 16) + 2.018 * (*u0 - 128);
gt0 = 1.164 * (*y0 - 16) - 0.813 * (*v0 - 128) - 0.394 * (*u0 - 128);
rt0 = 1.164 * (*y0 - 16) + 1.596 * (*v0 - 128);
bt1 = 1.164 * (*y1 - 16) + 2.018 * (*u0 - 128);
gt1 = 1.164 * (*y1 - 16) - 0.813 * (*v0 - 128) - 0.394 * (*u0 - 128);
rt1 = 1.164 * (*y1 - 16) + 1.596 * (*v0 - 128);
if(rt0 > 250) rt0 = 255;
if(rt0 < 0) rt0 = 0;
if(gt0 > 250) gt0 = 255;
if(gt0 < 0) gt0 = 0;
if(bt0 > 250) bt0 = 255;
if(bt0 < 0) bt0 = 0;
if(rt1 > 250) rt1 = 255;
if(rt1 < 0) rt1 = 0;
if(gt1 > 250) gt1 = 255;
if(gt1 < 0) gt1 = 0;
if(bt1 > 250) bt1 = 255;
if(bt1 < 0) bt1 = 0;
*r0 = (unsigned char)bt0;
*g0 = (unsigned char)gt0;
*b0 = (unsigned char)rt0;
*r1 = (unsigned char)bt1;
*g1 = (unsigned char)gt1;
*b1 = (unsigned char)rt1;
yuv = yuv + 4;
rgb = rgb + 6;
if(yuv == NULL)
break;
y0 = yuv;
u0 = yuv + 1;
y1 = yuv + 2;
v0 = yuv + 3;
r0 = rgb + 0;
g0 = rgb + 1;
b0 = rgb + 2;
r1 = rgb + 3;
g1 = rgb + 4;
b1 = rgb + 5;
}
}
ImageCamera::ImageCamera(QString c Qobject *parent) : QThread(parent)
{
camera = c;
err.clear();
nWidth = 1280;
nHeight = 960;
nSize = nWidth * nHeight * 2;
bKeep = false;
memset(pix_format 0 sizeof(pix_format));
cam_fd = -1;
buffer_count = 1; //5; // count 指定根据图像占用空间大小申请的缓存区个数
video_buffer_ptr = new u8*[buffer_count];
}
bool ImageCamera::initCamera()
{
int index = 0;
int ret = 0;
if(camera.isEmpty())
{
err = QString(“设备节点位置为空“);
return false;
}
if(cam_fd != -1)
{
close(cam_fd);
}
// 打开相机设备节点
cam_fd = open(camera.toStdString().c_str() O_RDWR);
if(cam_fd == -1)
{
err = QString(“打开相机节点失败“);
retur
属性 大小 日期 时间 名称
----------- --------- ---------- ----- ----
文件 13136 2018-12-29 18:23 V4L2_Camera\imagecamera.cpp
文件 1593 2018-12-29 13:20 V4L2_Camera\imagecamera.h
文件 172 2018-12-29 19:42 V4L2_Camera\main.cpp
文件 1181 2018-12-29 19:50 V4L2_Camera\mainwindow.cpp
文件 399 2018-12-29 19:44 V4L2_Camera\mainwindow.h
文件 1222 2018-12-29 19:48 V4L2_Camera\mainwindow.ui
文件 49948 2018-12-29 19:48 V4L2_Camera\V4L2_Camera
文件 1108 2018-12-29 19:48 V4L2_Camera\V4L2_Camera.pro
目录 0 2018-12-29 19:53 V4L2_Camera
----------- --------- ---------- ----- ----
68759 9
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