Qt监控系统实习项目.zip

#include "monitor.h" #include "ui_monitor.h" extern "C" { #include <stdio.h> #include <stdlib.h> } Monitor::Monitor(QWidget *parent) : QWidget(parent) { //创建文件夹 QDir dir; for (long j = 0; j < MAX_VIDEO; j++) { dir.mkdir("./pic" + QString::number(j)); } //初始化标志位和计数变量 record_flag = false; play_flag = false; video_flag = false; x2_flag = false; video_count = 0; pic_count = 0; i = 0; //动态生成按钮控件并绑定信号和槽 rec = new QPushButton(this); rec->show(); rec->move(370, 25); rec->resize(70, 25); rec->setText(tr("Record")); connect(rec, SIGNAL(clicked()), this, SLOT(rec_clicked())); end = new QPushButton(this); end->show(); end->move(370, 85); end->resize(70, 25); end->setText(tr("End")); connect(end, SIGNAL(clicked()), this, SLOT(end_clicked())); video = new QPushButton(this); video->show(); video->move(370, 145); video->resize(70, 25); video->setText(tr("Video")); connect(video, SIGNAL(clicked()), this, SLOT(video_clicked())); back = new QPushButton(this); back->show(); back->move(370, 205); back->resize(70, 25); back->setText(tr("Back")); connect(back, SIGNAL(clicked()), this, SLOT(back_clicked())); play = new QPushButton(this); play->hide(); play->move(335, 25); play->resize(70, 25); play->setText(tr("Play")); connect(play, SIGNAL(clicked()), this, SLOT(play_clicked())); pause = new QPushButton(this); pause->hide(); pause->move(410, 25); pause->resize(70, 25); pause->setText(tr("Pause")); connect(pause, SIGNAL(clicked()), this, SLOT(pause_clicked())); pre = new QPushButton(this); pre->hide(); pre->move(335, 85); pre->resize(70, 25); pre->setText(tr("Pre")); connect(pre, SIGNAL(clicked()), this, SLOT(pre_clicked())); next = new QPushButton(this); next->hide(); next->move(410, 85); next->resize(70, 25); next->setText(tr("Next")); connect(next, SIGNAL(clicked()), this, SLOT(next_clicked())); de = new QPushButton(this); de->hide(); de->move(370, 165); de->resize(70, 25); de->setText(tr("Delete")); connect(de, SIGNAL(clicked()), this, SLOT(de_clicked())); x2 = new QPushButton(this); x2->hide(); x2->move(370, 125); x2->resize(70, 25); x2->setText(tr("x1")); connect(x2, SIGNAL(clicked()), this, SLOT(x2_clicked())); //动态生成标签 label = new QLabel(this); label->move(100, 125); label->setText("empty video"); label->hide(); time_label = new QLabel(this); time_label->move(5, 5); time_label->setStyleSheet("color:white"); catch_real_time(); //获取当前系统时间 count_label = new QLabel(this); count_label->move(375, 5); count_label->resize(100,20); //申请存储空间 p_rgb = (unsigned char *)malloc(320 * 240 * 3 * sizeof(char)); pics_count = (long *)calloc(MAX_VIDEO, sizeof(long)); painter = new QPainter(this); frame = new QImage(p_rgb, 320, 240, QImage::Format_RGB888); play_dir = new QDir(); type_list << "*.jpg"; //后缀存入类型列表，用于目录文件读取 //遍历文件夹，将已存在的视频帧数量保存到pics_count数组中，并增加相应得统计 for (num = 0; num < MAX_VIDEO; num++) { get_dir(); if (name_list.count() != 0) { pics_count[num] = name_list.count(); video_count++; } } //设置视频数量标签 count_label->setText("video: " + QString::number(video_count) + "/" + QString::number(MAX_VIDEO)); num = 0; //获取摄像头设备 vd = new VideoDevice(tr("/dev/video0")); connect(vd, SIGNAL(display_error(QString)), this, SLOT(display_error(QString))); //开启设备，执行初始化 rs = vd->open_device(); if (-1 == rs) { QMessageBox::warning(this, tr("error"), tr("open /dev/dsp error"), QMessageBox::Yes); vd->close_device(); } rs = vd->init_device(); if (-1 == rs) { QMessageBox::warning(this, tr("error"), tr("init failed"), QMessageBox::Yes); vd->close_device(); } //开始视频采集 rs = vd->start_capturing(); if (-1 == rs) { QMessageBox::warning(this, tr("error"), tr("start capture failed"), QMessageBox::Yes); vd->close_device(); } if (-1 == rs) { QMessageBox::warning(this, tr("error"), tr("get frame failed"), QMessageBox::Yes); vd->stop_capturing(); } //设置定时器，绑定更新函数，用于更新绘图事件 timer = new QTimer(this); connect(timer, SIGNAL(timeout()), this, SLOT(repaint())); timer->start(100); //100毫秒一周期 //设置标题 setWindowTitle(tr("Monitor System")); } //析构函数 Monitor::~Monitor() { rs = vd->stop_capturing(); rs = vd->uninit_device(); rs = vd->close_device(); } //每100毫秒触发一次绘图事件 void Monitor::paintEvent(QPaintEvent *) { //通过是否进入回放界面进行判断 if (!video_flag) { //获取帧数据并将二进制转换成图片 rs = vd->get_frame((void **)&p_yuv, &len); convert_yuv_to_rgb_buffer(p_yuv, p_rgb, 320, 240); frame->loadFromData((uchar *)p_rgb, 320 * 240 * 3 * sizeof(char)); catch_real_time(); //在屏幕上绘制捕获的画面 painter->begin(this); painter->drawImage(5, 5, *frame); painter->end(); //开启录制 if (record_flag) { //录制时保存图片 pic_save(); } rs = vd->unget_frame(); //释放帧数据，即释放缓冲区 } else { //进入回放界面或触发暂停按钮时，只绘制一帧图像 if (!play_flag) { QPainter pic_painter(this); QString str = name_list.at(i); //获取图片名称 time_label->setText(str.left(19)); //截断系统时间字符串用于显示 pic_painter.drawPixmap(5, 5, QPixmap("./pic" + QString::number(num) + "/" + name_list.at(i))); //绘制图片 } else { //录像回放 pic_load(); } } } //出错处理 void Monitor::display_error(QString err) { QMessageBox::warning(this, tr("error"), err, QMessageBox::Yes); } //yuv格式转换为rgb格式 int Monitor::convert_yuv_to_rgb_buffer(unsigned char *yuv, unsigned char *rgb, unsigned int width, unsigned int height) { unsigned int in, out = 0; unsigned int pixel_16; unsigned char pixel_24[3]; unsigned int pixel32; int y0, u, y1, v; for (in = 0; in < width * height * 2; in += 4) { pixel_16 = yuv[in + 3] << 24 | yuv[in + 2] << 16 | yuv[in + 1] << 8 | yuv[in + 0]; y0 = (pixel_16 & 0x000000ff); u = (pixel_16 & 0x0000ff00) >> 8; y1 = (pixel_16 & 0x00ff0000) >> 16; v = (pixel_16 & 0xff000000) >> 24; pixel32 = convert_yuv_to_rgb_pixel(y0, u, v); pixel_24[0] = (pixel32 & 0x000000ff); pixel_24[1] = (pixel32 & 0x0000ff00) >> 8; pixel_24[2] = (pixel32 & 0x00ff0000) >> 16; rgb[out++] = pixel_24[0]; rgb[out++] = pixel_24[1]; rgb[out++] = pixel_24[2]; pixel32 = convert_yuv_to_rgb_pixel(y1, u, v); pixel_24[0] = (pixel32 & 0x000000ff); pixel_24[1] = (pixel32 & 0x0000ff00) >> 8; pixel_24[2] = (pixel32 & 0x00ff0000) >> 16; rgb[out++] = pixel_24[0]; rgb[out++] = pixel_24[1]; rgb[out++] = pixel_24[2]; } return 0; } int Monitor::convert_yuv_to_rgb_pixel(int y, int u, int v) { unsigned int pixel32 = 0; unsign