ARM-Linux-VideoPlayer视频播放器

#include "videoplayer.h" #include "ui_videoplayer.h" #include <QFileDialog> #include <QTime> #include <QDebug> #include <QKeyEvent> VideoPlayer::VideoPlayer(QWidget *parent) : QMainWindow(parent) , ui(new Ui::VideoPlayer) { ui->setupUi(this); player = new QMediaPlayer(this); videow = new MyVideoWidget(this); playlist = new QMediaPlaylist(this); //为videow安装过滤器 ----- 主窗口 //videow->installEventFilter(this); //将QVideoWidget加入布局管理器 ui->horizontalLayout->addWidget(videow); //设置QMediaPlayer的videooutput player->setVideoOutput(videow); //设置播放模式 playlist->setPlaybackMode(QMediaPlaylist::Loop); //设置播放器的播放列表 player->setPlaylist(playlist); //连接信号和槽 QObject::connect(player,SIGNAL(durationChanged(qint64)),this,SLOT(set_sider(qint64))); QObject::connect(player,SIGNAL(positionChanged(qint64)),this,SLOT(set_value(qint64))); //禁止暂停按钮 ui->pushButton_stop_cont->setEnabled(false); } VideoPlayer::~VideoPlayer() { delete ui; } bool VideoPlayer::eventFilter(QObject *watched,QEvent *event) { //按键事件 if(event->type()==QEvent::KeyPress){ QKeyEvent *keyevent = dynamic_cast<QKeyEvent *>(event); //按了Esc,退出全屏 if(keyevent->key()==Qt::Key_Escape){ //恢复播放窗口为子窗口 videow->setWindowFlag(Qt::SubWindow); //退出全屏 videow->showNormal(); //重设父窗口 videow->setParent(this); //重新加入布局管理器 ui->horizontalLayout->addWidget(videow); } } //调用基类的过滤器处理函数 return QMainWindow::eventFilter(watched,event); } void VideoPlayer::add_Layout(QWidget *w) { ui->horizontalLayout->addWidget(w); } void VideoPlayer::on_listWidget_itemDoubleClicked(QListWidgetItem *item) { int row = ui->listWidget->currentRow(); playlist->setCurrentIndex(row); //设置音量 player->setVolume(ui->verticalSlider->value()); player->play(); ui->pushButton_stop_cont->setEnabled(true); } //开始播放 void VideoPlayer::on_pushButton_start_clicked() { //当选中新的视频文件或者不是暂停状态===>重新播放 if(ui->listWidget->currentRow()!=playlist->currentIndex()|| player->state()!=QMediaPlayer::PausedState){ //指定当前播放文件 int row = ui->listWidget->currentRow(); playlist->setCurrentIndex(row); //设置音量 player->setVolume(ui->verticalSlider->value()); } player->play(); ui->pushButton_stop_cont->setEnabled(true); } //停止 void VideoPlayer::on_pushButton_stop_cont_clicked() { player->pause(); ui->pushButton_stop_cont->setEnabled(false); } //暂停 void VideoPlayer::on_pushButton_stop_clicked() { player->stop(); ui->pushButton_stop_cont->setEnabled(false); } //全屏 void VideoPlayer::on_pushButton_fullscreen_clicked() { //把子窗口提升为顶层窗口 videow->setWindowFlag(Qt::Window); //全屏 videow->showFullScreen(); } void VideoPlayer::on_pushButton_prev_clicked() { int row = ui->listWidget->currentRow(); if(row==0) row = ui->listWidget->count(); row--; ui->listWidget->setCurrentRow(row); on_listWidget_itemDoubleClicked(ui->listWidget->currentItem()); } void VideoPlayer::on_pushButton_next_clicked() { int row = ui->listWidget->currentRow(); if(row==ui->listWidget->count()-1) row = 0; else row++; ui->listWidget->setCurrentRow(row); on_listWidget_itemDoubleClicked(ui->listWidget->currentItem()); } void VideoPlayer::on_pushButton_add_video_clicked() { QStringList video_files = QFileDialog::getOpenFileNames(this,"选择视频文件","D:\\GZ20_2\\Qt\\Qt高级资料","*.mp3 *.mp4 *.avi"); //去重 for(int i=0;i<ui->listWidget->count();i++){ for(int j=0;j<video_files.count();j++){ if(ui->listWidget->item(i)->text()==video_files.at(j)){ video_files.removeAt(j); break; } } } //如果无添加文件，直接返回 if(video_files.isEmpty()) return; //添加到listWidget和playlist for(int i=0;i<video_files.count();i++){ QString file = video_files.at(i); //把文件加入播放列表 playlist->addMedia(QUrl::fromLocalFile(file)); } ui->listWidget->addItems(video_files); //定位 ui->listWidget->setCurrentRow(0); } void VideoPlayer::on_pushButton_del_video_clicked() { int row = ui->listWidget->currentRow(); //取出一项 QListWidgetItem *item = ui->listWidget->takeItem(row); if(item){ delete item; } //如果删除了正在播放的视频,禁止暂停 if(row==playlist->currentIndex()) ui->pushButton_stop_cont->setEnabled(false); //从播放列表删除 playlist->removeMedia(row); } void VideoPlayer::on_pushButton_clear_video_clicked() { ui->listWidget->clear(); //清空播放列表 playlist->clear(); ui->pushButton_stop_cont->setEnabled(false); } void VideoPlayer::on_horizontalSlider_sliderMoved(int position) { player->setPosition(position); } void VideoPlayer::on_verticalSlider_sliderMoved(int position) { player->setVolume(position); //更新显示 ui->label_volume->setText(QString("音量:%1").arg(position)); } //周期改变函数 void VideoPlayer::set_sider(qint64 duration) { qDebug()<<duration; if(duration!=0){ //设置进度条最大值 ui->horizontalSlider->setRange(0,duration); QTime t = QTime(duration/1000/60/60,duration/1000/60%60,duration/1000%60); //显示周期 video_duration = t.toString("hh:mm:ss"); ui->label_duration_position->setText(QString("00:00:00/%1").arg(video_duration)); //显示歌曲切换 ui->listWidget->setCurrentRow(playlist->currentIndex()); } } //进度改变 void VideoPlayer::set_value(qint64 position) { //更新进度条的值 ui->horizontalSlider->setValue(position); QTime t = QTime(position/1000/60/60,position/1000/60%60,position/1000%60); //显示进度 ui->label_duration_position->setText(QString("%1/%2"). arg(t.toString("hh:mm:ss")).arg(video_duration)); }