Jules, Kraken, or anyone:
After further research, the QT example media player code has helped me, and I’m very close.
It looks like libvlc has a set_drawable function call. It looks like the following call in Linux will set the drawable:
libvlc_media_player_set_drawable(_mp, _videoWidget->winId(), &_vlcexcep );
The second parameter, “_videoWidget->winId()”, is for QT - what would the equivalent be for Juce on Linux?
Here is the code snipet from “vlc_on_qt.cpp” at the LibVLC SampleCode QT Wiki URL - http://wiki.videolan.org/LibVLC_SampleCode_Qt
It took me 5 minutes to build this QT VLC media player application in Linux and the media player perfectly resized and “follows” the parent QT application. I’d love to be able to do this same thing in Juce, as I think Juce has a much better look and feel. I will post this code to the sample apps Cookbook after I get it going.
#include "vlc_on_qt.h"
#include <stdio.h>
#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\\" };
_videoWidget=new QFrame(this);
_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 */
_m = libvlc_media_new (_vlcinstance, file.toAscii(), &_vlcexcep);
//_m = libvlc_media_new (_vlcinstance, "sample-video.ogv", &_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
libvlc_media_player_set_drawable(_mp, _videoWidget->winId(), &_vlcexcep );
//libvlc_media_player_set_xwindow(_mp, _videoWidget->winId(), &_vlcexcep ); // for vlc 1.0
#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));
fprintf (stderr, "error: %s\n", libvlc_exception_get_message(ex));
exit (-1);
}
}
