git.sesse.net Git - vlc/blob - bindings/phonon/vlc/vlcloader.cpp

   1 /*****************************************************************************
   2  * VLC backend for the Phonon library                                        *
   3  * Copyright (C) 2007-2008 Tanguy Krotoff <tkrotoff@gmail.com>               *
   4  * Copyright (C) 2008 Lukas Durfina <lukas.durfina@gmail.com>                *
   5  * Copyright (C) 2009 Fathi Boudra <fabo@kde.org>                            *
   6  *                                                                           *
   7  * This program is free software; you can redistribute it and/or             *
   8  * modify it under the terms of the GNU Lesser General Public                *
   9  * License as published by the Free Software Foundation; either              *
  10  * version 3 of the License, or (at your option) any later version.          *
  11  *                                                                           *
  12  * This program is distributed in the hope that it will be useful,           *
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of            *
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU         *
  15  * Lesser General Public License for more details.                           *
  16  *                                                                           *
  17  * You should have received a copy of the GNU Lesser General Public          *
  18  * License along with this package; if not, write to the Free Software       *
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA *
  20  *****************************************************************************/
  21
  22 #include "vlcloader.h"
  23
  24 #include <QtCore/QDebug>
  25 #include <QtCore/QDir>
  26 #include <QtCore/QLibrary>
  27 #include <QtCore/QSettings>
  28 #include <QtCore/QString>
  29 #include <QtCore/QStringList>
  30
  31 // Global variables
  32 libvlc_instance_t *vlc_instance = 0;
  33 libvlc_exception_t *vlc_exception = new libvlc_exception_t();
  34 libvlc_media_player_t *vlc_current_media_player = 0;
  35
  36 namespace Phonon
  37 {
  38 namespace VLC {
  39
  40 bool vlcInit()
  41 {
  42     // Global variables
  43     vlc_instance = 0;
  44     vlc_exception = new libvlc_exception_t();
  45
  46     QString path = vlcPath();
  47     if (!path.isEmpty()) {
  48         QString pluginsPath = path;
  49 #if defined(Q_OS_UNIX)
  50         pluginsPath.append("/vlc");
  51 #elif defined(Q_OS_WIN)
  52         pluginsPath.append("\\plugins");
  53 #endif
  54         // VLC command line options. See vlc --full-help
  55         const char *vlcArgs[] = {
  56             path.toLatin1().constData(),
  57             "--plugin-path=", pluginsPath.toAscii().constData(),
  58             "--verbose=2",
  59             "--intf=dummy",
  60             "--extraintf=logger",
  61             "--ignore-config",
  62             "--reset-plugins-cache",
  63             "--no-media-library",
  64             "--no-one-instance",
  65             "--no-osd",
  66             "--no-stats",
  67             "--no-video-title-show"
  68         };
  69
  70         libvlc_exception_init(vlc_exception);
  71
  72         // Create and initialize a libvlc instance (it should be done only once)
  73         vlc_instance = libvlc_new(sizeof(vlcArgs) / sizeof(*vlcArgs),
  74                                   vlcArgs,
  75                                   vlc_exception);
  76         vlcExceptionRaised();
  77
  78         return true;
  79     } else {
  80         return false;
  81     }
  82 }
  83
  84 void vlcRelease()
  85 {
  86     libvlc_release(vlc_instance);
  87     vlcExceptionRaised();
  88     vlcUnload();
  89 }
  90
  91 void vlcExceptionRaised()
  92 {
  93     if (libvlc_exception_raised(vlc_exception)) {
  94         qDebug() << "libvlc exception:" << libvlc_exception_get_message(vlc_exception);
  95         libvlc_exception_clear(vlc_exception);
  96     }
  97 }
  98
  99 #if defined(Q_OS_UNIX)
 100 static bool libGreaterThan(const QString &lhs, const QString &rhs)
 101 {
 102     QStringList lhsparts = lhs.split(QLatin1Char('.'));
 103     QStringList rhsparts = rhs.split(QLatin1Char('.'));
 104     Q_ASSERT(lhsparts.count() > 1 && rhsparts.count() > 1);
 105
 106     for (int i = 1; i < rhsparts.count(); ++i) {
 107         if (lhsparts.count() <= i)
 108             // left hand side is shorter, so it's less than rhs
 109             return false;
 110
 111         bool ok = false;
 112         int b = 0;
 113         int a = lhsparts.at(i).toInt(&ok);
 114         if (ok)
 115             b = rhsparts.at(i).toInt(&ok);
 116         if (ok) {
 117             // both toInt succeeded
 118             if (a == b)
 119                 continue;
 120             return a > b;
 121         } else {
 122             // compare as strings;
 123             if (lhsparts.at(i) == rhsparts.at(i))
 124                 continue;
 125             return lhsparts.at(i) > rhsparts.at(i);
 126         }
 127     }
 128
 129     // they compared strictly equally so far
 130     // lhs cannot be less than rhs
 131     return true;
 132 }
 133 #endif
 134
 135 static QStringList findAllLibVlc()
 136 {
 137     QStringList paths;
 138 #if defined(Q_OS_UNIX)
 139     paths = QString::fromLatin1(qgetenv("LD_LIBRARY_PATH"))
 140             .split(QLatin1Char(':'), QString::SkipEmptyParts);
 141     paths << QLatin1String("/usr/lib") << QLatin1String("/usr/local/lib");
 142
 143     QStringList foundVlcs;
 144     foreach (const QString &path, paths) {
 145         QDir dir = QDir(path);
 146         QStringList entryList = dir.entryList(QStringList() << QLatin1String("libvlc.*"), QDir::Files);
 147
 148         qSort(entryList.begin(), entryList.end(), libGreaterThan);
 149         foreach (const QString &entry, entryList)
 150             foundVlcs << path + QLatin1Char('/') + entry;
 151     }
 152
 153     return foundVlcs;
 154 #elif defined(Q_OS_WIN)
 155     // Read VLC version and installation directory from Windows registry
 156     QSettings settings(QSettings::SystemScope, "VideoLAN", "VLC");
 157     QString vlcVersion = settings.value("Version").toString();
 158     QString vlcInstallDir = settings.value("InstallDir").toString();
 159     if (vlcVersion.startsWith("1.0") && !vlcInstallDir.isEmpty()) {
 160         paths << vlcInstallDir + QLatin1Char('\\') + "libvlc";
 161         return paths;
 162     } else {
 163         return QString();
 164     }
 165 #endif
 166 }
 167
 168 static QLibrary *vlcLibrary = 0;
 169
 170 QString vlcPath()
 171 {
 172     static QString path;
 173     if (!path.isEmpty()) {
 174         return path;
 175     }
 176
 177     vlcLibrary = new QLibrary();
 178     QStringList paths = findAllLibVlc();
 179     foreach(path, paths) {
 180         vlcLibrary->setFileName(path);
 181
 182         if (vlcLibrary->resolve("libvlc_exception_init")) {
 183             return path;
 184         } else {
 185             qDebug("Cannot resolve the symbol or load VLC library");
 186         }
 187         qWarning() << vlcLibrary->errorString();
 188     }
 189
 190     vlcUnload();
 191
 192     return QString();
 193 }
 194
 195 void vlcUnload()
 196 {
 197     vlcLibrary->unload();
 198     delete vlcLibrary;
 199     vlcLibrary = 0;
 200 }
 201
 202 }
 203 } // Namespace Phonon::VLC