全格式音频和视频能播放器QT源码

#include "mainwindow.h" #include "ui_mainwindow.h" #include <QDir> #include <QFile> #include <QGraphicsScene> #include <QGraphicsProxyWidget> #include <QGraphicsView> #include "vlc/vlc.h" #include <QDebug> #include <QLineEdit> #include "shexiangtou.h" MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow) { ui->setupUi(this); m_fileDialog = new QFileDialog(this); m_fileDialog->setWindowTitle(tr("Open Video")); m_fileDialog->setDirectory("."); m_fileDialog->setNameFilter(tr("Video Files(*.mp4 *.mp3 *flv *3gp *rmvb)")); m_fileDialog->hide(); } MainWindow::~MainWindow() { delete ui; } bool MainWindow::load(const QString &filepath) { if(filepath.isEmpty()){ qDebug() << "filepath isEmpty"; return false; } if(!QFile::exists(filepath)){ qDebug() << "QFile no exists"; return false; } bool bload = loadVlc(QDir::toNativeSeparators(filepath).toUtf8().constData()); if(!bload){ qDebug() << "bload no isEmpty"; return false; } return true; } void MainWindow::play() { if(libvlc_Ended == libvlc_media_get_state(m_media)){ stop();//vlc这个设定太奇怪了，当自然播放结束，重新播放还得主动调用一次stop(); } libvlc_media_player_play(m_mediaPlayer); } void MainWindow::pause() { if((bool)libvlc_media_player_is_playing(m_mediaPlayer)){ m_bPlaying = false; libvlc_media_player_set_pause(m_mediaPlayer, 1);//暂停 } } void MainWindow::stop() { m_bPlaying = false; libvlc_media_player_stop(m_mediaPlayer); } bool MainWindow::loadVlc(const QString &filepath) { m_vlcInstance = libvlc_new(0, NULL); m_media = libvlc_media_new_path(m_vlcInstance, filepath.toUtf8().data()); if(!m_media){ freeVlc(); return m_media; } qDebug() << "loadVlc" << qPrintable(filepath); m_mediaPlayer = libvlc_media_player_new_from_media(m_media); if(!m_mediaPlayer){ freeVlc(); return false; } libvlc_media_parse(m_media); libvlc_event_manager_t *em = libvlc_media_player_event_manager(m_mediaPlayer); libvlc_event_attach(em, libvlc_MediaPlayerTimeChanged, vlcEvents, this); libvlc_event_attach(em, libvlc_MediaPlayerEndReached, vlcEvents, this); libvlc_event_attach(em, libvlc_MediaPlayerStopped, vlcEvents, this); libvlc_event_attach(em, libvlc_MediaPlayerPlaying, vlcEvents, this); libvlc_event_attach(em, libvlc_MediaPlayerPaused, vlcEvents, this); // libvlc_media_player_set_hwnd(m_mediaPlayer, (void *)ui->label->winId()); libvlc_media_player_set_hwnd(m_mediaPlayer, (void *)ui->widget->winId()); return true; } void MainWindow::vlcEvents(const libvlc_event_t *ev, void *param) { Q_UNUSED(param); switch (ev->type) { case libvlc_MediaPlayerTimeChanged: break; case libvlc_MediaPlayerEndReached://不能在回调里调用stop();否则会卡死 break; case libvlc_MediaPlayerStopped: qDebug() << "libvlc_MediaPlayerStopped"; break; case libvlc_MediaPlayerPlaying: qDebug() << "libvlc_MediaPlayerPlay"; break; case libvlc_MediaPlayerPaused: qDebug() << "libvlc_MediaPlayerPaused"; break; } } void MainWindow::freeVlc() { if(m_media){ libvlc_media_release(m_media); m_media = Q_NULLPTR; } if(m_mediaPlayer){ libvlc_media_player_stop(m_mediaPlayer); libvlc_media_player_release(m_mediaPlayer); m_mediaPlayer = Q_NULLPTR; } if(m_vlcInstance){ libvlc_release(m_vlcInstance); m_vlcInstance = Q_NULLPTR; } } bool MainWindow::setMedia(char * address, WId id) { m_vlcInstance = libvlc_new(0, NULL); libvlc_media_release(m_media); m_media = libvlc_media_new_location(m_vlcInstance, address); if (!m_media) { freeVlc(); return false; } m_mediaPlayer = libvlc_media_player_new_from_media(m_media); if (!m_mediaPlayer) { freeVlc(); return false; } libvlc_media_player_set_media(m_mediaPlayer, m_media); if (id == 0) libvlc_media_player_set_hwnd(m_mediaPlayer, NULL); else libvlc_media_player_set_hwnd(m_mediaPlayer, (void *)id); return true; } void MainWindow::setCache(int cache) { } void MainWindow::on_pushButton_clicked() { if(ui->pushButton->text() == "play") { play(); ui->pushButton->setText("pause"); } else if(ui->pushButton->text() == "pause") { pause(); ui->pushButton->setText("play"); } } void MainWindow::on_pB_Stop_clicked() { stop(); ui->pushButton->setText("play"); } void MainWindow::on_pB_Open_clicked() { if(m_vlcInstance) { freeVlc(); } m_fileDialog->show(); if(m_fileDialog->exec() == QDialog::Accepted) { QString path = m_fileDialog->selectedFiles()[0]; ui->lB_Path->setText(path); load(path); } } void MainWindow::on_opencamera_clicked() { shexiangtou *a = new shexiangtou(); a->show(); setMedia("dshow://",a->getWinID()); //获得char ×类型的缓冲时间参数。 QString para = "network-caching=" + QString::number(20); QByteArray ba = para.toLatin1(); char *add = ba.data(); libvlc_media_add_option(m_media, add); libvlc_media_player_play(m_mediaPlayer); }