QT5调用VLC编程完美了

/* libVLC and Qt sample code * Copyright © 2009 Alexander Maringer <maringer@maringer-it.de> */ #include "vlc_on_qt.h" //#include <QX11EmbedContainer> #include <QVBoxLayout> #include <QPushButton> #include <QSlider> #include <QTimer> #include <QFrame> Player::Player() : QWidget() { //preparation of the vlc command const char * const vlc_args[] = { "-I", "dummy", /* Don't use any interface */ "--ignore-config", /* Don't use VLC's config */ "--extraintf=logger", //log anything "--verbose=2", //be much more verbose then normal for debugging purpose "--plugin-path=C:\\vlc-0.9.9-win32\\plugins\\" }; #ifdef Q_WS_X11 _videoWidget=new QX11EmbedContainer(this); #else _videoWidget=new QFrame(this); #endif _volumeSlider=new QSlider(Qt::Horizontal,this); _volumeSlider->setMaximum(100); //the volume is between 0 and 100 _volumeSlider->setToolTip("Audio slider"); // Note: if you use streaming, there is no ability to use the position slider _positionSlider=new QSlider(Qt::Horizontal,this); _positionSlider->setMaximum(POSITION_RESOLUTION); QVBoxLayout *layout = new QVBoxLayout; layout->addWidget(_videoWidget); layout->addWidget(_positionSlider); layout->addWidget(_volumeSlider); setLayout(layout); _isPlaying=false; poller=new QTimer(this); //Initialize an instance of vlc //a structure for the exception is neede for this initalization libvlc_exception_init(&_vlcexcep); //create a new libvlc instance _vlcinstance=libvlc_new(sizeof(vlc_args) / sizeof(vlc_args[0]), vlc_args,&_vlcexcep); //tricky calculation of the char space used raise (&_vlcexcep); // Create a media player playing environement _mp = libvlc_media_player_new (_vlcinstance, &_vlcexcep); raise (&_vlcexcep); //connect the two sliders to the corresponding slots (uses Qt's signal / slots technology) connect(poller, SIGNAL(timeout()), this, SLOT(updateInterface())); connect(_positionSlider, SIGNAL(sliderMoved(int)), this, SLOT(changePosition(int))); connect(_volumeSlider, SIGNAL(sliderMoved(int)), this, SLOT(changeVolume(int))); poller->start(100); //start timer to trigger every 100 ms the updateInterface slot } //desctructor Player::~Player() { /* Stop playing */ libvlc_media_player_stop (_mp, &_vlcexcep); /* Free the media_player */ libvlc_media_player_release (_mp); libvlc_release (_vlcinstance); raise (&_vlcexcep); } void Player::playFile(QString file) { //the file has to be in one of the following formats /perhaps a little bit outdated) /* [file://]filename Plain media file http://ip:port/file HTTP URL ftp://ip:port/file FTP URL mms://ip:port/file MMS URL screen:// Screen capture [dvd://][device][@raw_device] DVD device [vcd://][device] VCD device [cdda://][device] Audio CD device udp:[[<source address>]@[<bind address>][:<bind port>]] */ /* Create a new LibVLC media descriptor */ QByteArray ba = file.toLatin1(); const char *c_str2 = ba.data(); _m = libvlc_media_new (_vlcinstance,c_str2, &_vlcexcep); raise(&_vlcexcep); libvlc_media_player_set_media (_mp, _m, &_vlcexcep); raise(&_vlcexcep); // /!\ Please note /!\ // // passing the widget to the lib shows vlc at which position it should show up // vlc automatically resizes the video to the ´given size of the widget // and it even resizes it, if the size changes at the playing /* Get our media instance to use our window */ #if defined(Q_OS_WIN) libvlc_media_player_set_drawable(_mp, reinterpret_cast<unsigned int>(_videoWidget->winId()), &_vlcexcep ); //libvlc_media_player_set_hwnd(_mp, _videoWidget->winId(), &_vlcexcep ); // for vlc 1.0 #elif defined(Q_OS_MAC) libvlc_media_player_set_drawable(_mp, _videoWidget->winId(), &_vlcexcep ); //libvlc_media_player_set_agl (_mp, _videoWidget->winId(), &_vlcexcep); // for vlc 1.0 #else //Linux //[20101201 Ondrej Spilka] obsolete call on libVLC >=1.1.5 //libvlc_media_player_set_drawable(_mp, _videoWidget->winId(), &_vlcexcep ); //libvlc_media_player_set_xwindow(_mp, _videoWidget->winId(), &_vlcexcep ); // for vlc 1.0 /* again note X11 handle on Linux is needed winID() returns X11 handle when QX11EmbedContainer us used */ int windid = _videoWidget->winId(); libvlc_media_player_set_xwindow (mp, windid ); #endif raise(&_vlcexcep); /* Play */ libvlc_media_player_play (_mp, &_vlcexcep ); raise(&_vlcexcep); _isPlaying=true; } void Player::changeVolume(int newVolume) { libvlc_exception_clear(&_vlcexcep); libvlc_audio_set_volume (_vlcinstance,newVolume , &_vlcexcep); raise(&_vlcexcep); } void Player::changePosition(int newPosition) { libvlc_exception_clear(&_vlcexcep); // It's possible that the vlc doesn't play anything // so check before libvlc_media_t *curMedia = libvlc_media_player_get_media (_mp, &_vlcexcep); libvlc_exception_clear(&_vlcexcep); if (curMedia == NULL) return; float pos=(float)(newPosition)/(float)POSITION_RESOLUTION; libvlc_media_player_set_position (_mp, pos, &_vlcexcep); raise(&_vlcexcep); } void Player::updateInterface() { if(!_isPlaying) return; // It's possible that the vlc doesn't play anything // so check before libvlc_media_t *curMedia = libvlc_media_player_get_media (_mp, &_vlcexcep); libvlc_exception_clear(&_vlcexcep); if (curMedia == NULL) return; float pos=libvlc_media_player_get_position (_mp, &_vlcexcep); int siderPos=(int)(pos*(float)(POSITION_RESOLUTION)); _positionSlider->setValue(siderPos); int volume=libvlc_audio_get_volume (_vlcinstance,&_vlcexcep); _volumeSlider->setValue(volume); } void Player::raise(libvlc_exception_t * ex) { if (libvlc_exception_raised (ex)) { fprintf (stderr, "error: %s\n", libvlc_exception_get_message(ex)); exit (-1); } }