QT编写的多媒体播放器源码--mediaplayer

#include "mainwindow.h" #include "ui_mainwindow.h" MainWindow::MainWindow(QWidget *parent) : QWidget(parent) ,colorDialog(0) ,coverLabel(0) ,playerState(QMediaPlayer::StoppedState) ,playerMuted(false) { setWindowTitle("Media Player"); listView_playlist=new QListView(this); horizontalSlider_pos= new QSlider(Qt::Horizontal, this); label_duration_pos=new QLabel(this); pushButton_open=new QPushButton(tr("Open"),this); toolButton_stop= new QToolButton(this); toolButton_pre= new QToolButton(this); toolButton_play= new QToolButton(this); toolButton_next= new QToolButton(this); toolButton_mute= new QToolButton(this); horizontalSlider_vol= new QSlider(Qt::Horizontal, this); comboBox_rate=new QComboBox(this); pushButton_fullscreen=new QPushButton(tr("FullScreen"),this); pushButton_coloroptions=new QPushButton(tr("ColorOptions..."),this); mediaPlayer = new QMediaPlayer(this); connect(mediaPlayer, SIGNAL(mediaStatusChanged(QMediaPlayer::MediaStatus)), this, SLOT(mediaStatusChanged(QMediaPlayer::MediaStatus)));//load/buffering/unknow connect(mediaPlayer, SIGNAL(stateChanged(QMediaPlayer::State)), this, SLOT(stateChanged(QMediaPlayer::State)));//play/pause/stop connect(mediaPlayer, SIGNAL(durationChanged(qint64)), SLOT(durationChanged(qint64))); //likeyong20170927,mediaPlayer is inherit from MainWindow,even mediaPlayer is the recerver, SLOT()(inherit form MainWindow) can also be invoked. connect(mediaPlayer, SIGNAL(positionChanged(qint64)), SLOT(positionChanged(qint64))); connect(mediaPlayer, SIGNAL(videoAvailableChanged(bool)), SLOT(videoAvailableChanged(bool)));//currently in play/pause state connect(mediaPlayer, SIGNAL(metaDataChanged()), SLOT(metaDataChanged())); connect(mediaPlayer, SIGNAL(error(QMediaPlayer::Error)), this, SLOT(displayErrorMessage())); connect(mediaPlayer, SIGNAL(bufferStatusChanged(int)), this, SLOT(bufferingProgress(int))); mediaPlaylist = new QMediaPlaylist(); connect(mediaPlaylist, SIGNAL(currentIndexChanged(int)), SLOT(playlistPositionChanged(int))); mediaPlayer->setPlaylist(mediaPlaylist); connect(listView_playlist,SIGNAL(clicked(QModelIndex)),this,SLOT(jump(QModelIndex))); horizontalSlider_pos->setRange(0, mediaPlayer->duration() / 1000); connect(horizontalSlider_pos, SIGNAL(sliderMoved(int)), this, SLOT(seek(int))); connect(pushButton_open, SIGNAL(clicked()), this, SLOT(open())); toolButton_stop->setIcon(style()->standardIcon(QStyle::SP_MediaStop)); toolButton_stop->setEnabled(false); connect(toolButton_stop, SIGNAL(clicked()), this, SLOT(stop())); toolButton_pre->setIcon(style()->standardIcon(QStyle::SP_MediaSkipBackward)); connect(toolButton_pre, SIGNAL(clicked()), this, SLOT(previous())); toolButton_play->setIcon(style()->standardIcon(QStyle::SP_MediaPlay)); connect(toolButton_play, SIGNAL(clicked()), this, SLOT(play())); toolButton_next->setIcon(style()->standardIcon(QStyle::SP_MediaSkipForward)); connect(toolButton_next, SIGNAL(clicked()), this, SLOT(next())); toolButton_mute->setIcon(style()->standardIcon(QStyle::SP_MediaVolume)); connect(toolButton_mute, SIGNAL(clicked()), this, SLOT(changeMute())); horizontalSlider_vol->setRange(0, 100); connect(horizontalSlider_vol, SIGNAL(sliderMoved(int)), this, SLOT(changeVolume(int))); comboBox_rate->addItem("0.5x", QVariant(0.5)); comboBox_rate->addItem("1.0x", QVariant(1.0)); comboBox_rate->addItem("2.0x", QVariant(2.0)); comboBox_rate->setCurrentIndex(1); connect(comboBox_rate, SIGNAL(activated(int)), this, SLOT(changeRate(int))); pushButton_fullscreen->setCheckable(true); connect(pushButton_coloroptions, SIGNAL(clicked()), this, SLOT(showColorDialog())); //mediaPlayer->setMedia( QUrl::fromLocalFile("C:/Users/Public/Videos/Sample Videos/Wildlife.wmv") ); //mediaPlayer->setMedia( QUrl::fromLocalFile("C:\\Users\\Public\\Videos\\Sample Videos\\Wildlife.wmv") ); //mediaPlayer->setMedia(QDir("C:/Users/Public/Videos/Sample Videos/Wildlife.wmv")); videoWidget=new MyVideoWidget(this); videoWidget->show(); mediaPlayer->setVideoOutput(videoWidget); //mediaPlayer->play(); QBoxLayout *HLayout = new QHBoxLayout; HLayout->addWidget(videoWidget, 2); HLayout->addWidget(listView_playlist); QBoxLayout *HLayout2 = new QHBoxLayout; HLayout2->addWidget(horizontalSlider_pos, 2); HLayout2->addWidget(label_duration_pos); QBoxLayout *controlLayout = new QHBoxLayout; controlLayout->setMargin(0); controlLayout->addWidget(pushButton_open); controlLayout->addStretch(1); controlLayout->addWidget(toolButton_stop); controlLayout->addStretch(1); controlLayout->addWidget(toolButton_pre); controlLayout->addStretch(1); controlLayout->addWidget(toolButton_play); controlLayout->addStretch(1); controlLayout->addWidget(toolButton_next); controlLayout->addStretch(1); controlLayout->addWidget(toolButton_mute); controlLayout->addStretch(1); controlLayout->addWidget(horizontalSlider_vol); controlLayout->addStretch(1); controlLayout->addWidget(comboBox_rate); controlLayout->addStretch(1); controlLayout->addWidget(pushButton_fullscreen); controlLayout->addStretch(1); controlLayout->addWidget(pushButton_coloroptions); QBoxLayout *TopLayout = new QVBoxLayout; TopLayout->addLayout(HLayout); TopLayout->addLayout(HLayout2); TopLayout->addLayout(controlLayout); setLayout(TopLayout); if (!isMediaPlayerAvailable()) { QMessageBox::warning(this, tr("Service not available"), tr("The QMediaPlayer object does not have a valid service.\n"\ "Please check the media service plugins are installed.")); disableAllKey(); } } MainWindow::~MainWindow() { //delete ui; } void MainWindow::disableAllKey() { listView_playlist->setEnabled(false); horizontalSlider_pos->setEnabled(false); label_duration_pos->setEnabled(false); pushButton_open->setEnabled(false); toolButton_stop->setEnabled(false); toolButton_pre->setEnabled(false); toolButton_play->setEnabled(false); toolButton_next->setEnabled(false); toolButton_mute->setEnabled(false); horizontalSlider_vol->setEnabled(false); comboBox_rate->setEnabled(false); pushButton_fullscreen->setEnabled(false); pushButton_coloroptions->setEnabled(false); } bool MainWindow::isMediaPlayerAvailable() const { return mediaPlayer->isAvailable(); } void MainWindow::open() { QFileDialog fileDialog(this); fileDialog.setAcceptMode(QFileDialog::AcceptOpen); fileDialog.setWindowTitle(tr("Open Files")); QStringList supportedMimeTypes = mediaPlayer->supportedMimeTypes(); if (!supportedMimeTypes.isEmpty()) { supportedMimeTypes.append("audio/x-m3u"); // MP3 playlists fileDialog.setMimeTypeFilters(supportedMimeTypes); } fileDialog.setDirectory(QStandardPaths::standardLocations(QStandardPaths::MoviesLocation).value(0, QDir::homePath())); if (fileDialog.exec() == QDialog::Accepted) addToPlaylist(fileDialog.selectedUrls()); } static bool isPlaylist(const QUrl &url) // Check for ".m3u" playlists. { if (!url.isLocalFile()) return false; const QFileInfo fileInfo(url.toLocalFile()); return fileInfo.exists() && !fileInfo.suffix().compare(QLatin1String("m3u"), Qt::CaseInsensitive); } void MainWindow::addToPlaylist(const QList<QUrl> urls) { //mediaPlaylist->removeMedia(0);//add by likeyong //mediaPlaylist->clear();//add by likeyong bool isFindSameUrl = false; foreach (const QUrl &url, urls) { if (isPlaylist(url)) mediaPlaylist->load(url); else{ if(0 == mediaPlaylist->mediaCount()){ mediaPlaylist->addMedia(url); }else{ for(int i = 0; i < mediaPlaylist->mediaCount(); i++){ QUrl location = mediaPlaylist->media(i).canonicalUrl(); if(QFileInfo(url.path()).fileName() == QFileInfo(location