Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.

BUG:215923


git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdemultimedia@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 689 insertions, 0 deletions

diff --git a/juk/playermanager.cpp b/juk/playermanager.cpp
new file mode 100644
index 00000000..b60c7af5
--- /dev/null
+++ b/juk/playermanager.cpp
@@ -0,0 +1,689 @@
+/***************************************************************************
+    begin                : Sat Feb 14 2004
+    copyright            : (C) 2004 by Scott Wheeler
+    email                : wheeler@kde.org
+***************************************************************************/
+
+/***************************************************************************
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ ***************************************************************************/
+
+/**
+ * Note to those who work here.  The preprocessor variables HAVE_ARTS and HAVE_GSTREAMER
+ * are ::ALWAYS DEFINED::.  You can't use #ifdef to see if they're present, you should just
+ * use #if.
+ *
+ * However, HAVE_AKODE is #define'd if present, and undefined if not present.
+ * - mpyne
+ */
+
+#include <kdebug.h>
+#include <klocale.h>
+
+#include <qslider.h>
+#include <qtimer.h>
+
+#include <math.h>
+
+#include "artsplayer.h"
+#include "akodeplayer.h"
+#include "gstreamerplayer.h"
+#include "playermanager.h"
+#include "playlistinterface.h"
+#include "slideraction.h"
+#include "statuslabel.h"
+#include "actioncollection.h"
+#include "collectionlist.h"
+#include "coverinfo.h"
+#include "tag.h"
+
+#include "config.h"
+
+using namespace ActionCollection;
+
+enum PlayerManagerStatus { StatusStopped = -1, StatusPaused = 1, StatusPlaying = 2 };
+
+////////////////////////////////////////////////////////////////////////////////
+// helper functions
+////////////////////////////////////////////////////////////////////////////////
+
+enum SoundSystem { ArtsBackend = 0, GStreamerBackend = 1, AkodeBackend = 2 };
+
+static Player *createPlayer(int system = ArtsBackend)
+{
+
+    Player *p = 0;
+    switch(system) {
+#ifdef HAVE_AKODE
+    case AkodeBackend:
+        p = new aKodePlayer;
+        break;
+#endif
+#if HAVE_ARTS
+    case ArtsBackend:
+        p = new ArtsPlayer;
+        break;
+#endif
+#if HAVE_GSTREAMER
+    case GStreamerBackend:
+        p = new GStreamerPlayer;
+        break;
+#endif 
+    default:
+#if HAVE_ARTS
+        p = new ArtsPlayer;
+#elif HAVE_GSTREAMER
+        p = new GStreamerPlayer;
+#else
+        p = new aKodePlayer;
+#endif
+        break;
+    }
+    return p;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// protected members
+////////////////////////////////////////////////////////////////////////////////
+
+PlayerManager::PlayerManager() :
+    Player(),
+    m_sliderAction(0),
+    m_playlistInterface(0),
+    m_statusLabel(0),
+    m_player(0),
+    m_timer(0),
+    m_noSeek(false),
+    m_muted(false),
+    m_setup(false)
+{
+// This class is the first thing constructed during program startup, and
+// therefore has no access to the widgets needed by the setup() method.
+// Since the setup() method will be called indirectly by the player() method
+// later, just disable it here. -- mpyne
+//    setup();
+}
+
+PlayerManager::~PlayerManager()
+{
+    delete m_player;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// public members
+////////////////////////////////////////////////////////////////////////////////
+
+PlayerManager *PlayerManager::instance() // static
+{
+    static PlayerManager manager;
+    return &manager;
+}
+
+bool PlayerManager::playing() const
+{
+    if(!player())
+        return false;
+
+    return player()->playing();
+}
+
+bool PlayerManager::paused() const
+{
+    if(!player())
+        return false;
+
+    return player()->paused();
+}
+
+float PlayerManager::volume() const
+{
+    if(!player())
+        return 0;
+
+    return player()->volume();
+}
+
+int PlayerManager::status() const
+{
+    if(!player())
+        return StatusStopped;
+
+    if(player()->paused())
+        return StatusPaused;
+
+    if(player()->playing())
+        return StatusPlaying;
+
+    return 0;
+}
+
+int PlayerManager::totalTime() const
+{
+    if(!player())
+        return 0;
+
+    return player()->totalTime();
+}
+
+int PlayerManager::currentTime() const
+{
+    if(!player())
+        return 0;
+
+    return player()->currentTime();
+}
+
+int PlayerManager::position() const
+{
+    if(!player())
+        return 0;
+
+    return player()->position();
+}
+
+QStringList PlayerManager::trackProperties()
+{
+    return FileHandle::properties();
+}
+
+QString PlayerManager::trackProperty(const QString &property) const
+{
+    if(!playing() && !paused())
+        return QString::null;
+
+    return m_file.property(property);
+}
+
+QPixmap PlayerManager::trackCover(const QString &size) const
+{
+    if(!playing() && !paused())
+        return QPixmap();
+
+    if(size.lower() == "small")
+        return m_file.coverInfo()->pixmap(CoverInfo::Thumbnail);
+    if(size.lower() == "large")
+        return m_file.coverInfo()->pixmap(CoverInfo::FullSize);
+
+    return QPixmap();
+}
+
+FileHandle PlayerManager::playingFile() const
+{
+    return m_file;
+}
+
+QString PlayerManager::playingString() const
+{
+    if(!playing())
+        return QString::null;
+
+    QString str = m_file.tag()->artist() + " - " + m_file.tag()->title();
+    if(m_file.tag()->artist().isEmpty())
+        str = m_file.tag()->title();
+
+    return str;
+}
+
+void PlayerManager::setPlaylistInterface(PlaylistInterface *interface)
+{
+    m_playlistInterface = interface;
+}
+
+void PlayerManager::setStatusLabel(StatusLabel *label)
+{
+    m_statusLabel = label;
+}
+
+KSelectAction *PlayerManager::playerSelectAction(QObject *parent) // static
+{
+    KSelectAction *action = 0;
+    action = new KSelectAction(i18n("&Output To"), 0, parent, "outputSelect");
+    QStringList l;
+
+#if HAVE_ARTS
+    l << i18n("aRts");
+#endif
+#if HAVE_GSTREAMER
+    l << i18n("GStreamer");
+#endif
+#ifdef HAVE_AKODE
+    l << i18n("aKode");
+#endif
+
+    if(l.isEmpty()) {
+        kdError(65432) << "Your JuK seems to have no output backend possibilities.\n";
+        l << i18n("aKode"); // Looks like akode is the default backend.
+    }
+
+    action->setItems(l);
+    return action;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// public slots
+////////////////////////////////////////////////////////////////////////////////
+
+void PlayerManager::play(const FileHandle &file)
+{
+    if(!player() || !m_playlistInterface)
+        return;
+
+    if(file.isNull()) {
+        if(player()->paused())
+            player()->play();
+        else if(player()->playing()) {
+            if(m_sliderAction->trackPositionSlider())
+                m_sliderAction->trackPositionSlider()->setValue(0);
+            player()->seekPosition(0);
+        }
+        else {
+            m_playlistInterface->playNext();
+            m_file = m_playlistInterface->currentFile();
+
+            if(!m_file.isNull())
+                player()->play(m_file);
+        }
+    }
+    else {
+        m_file = file;
+        player()->play(file);
+    }
+
+    // Make sure that the player() actually starts before doing anything.
+
+    if(!player()->playing()) {
+        kdWarning(65432) << "Unable to play " << file.absFilePath() << endl;
+        stop();
+        return;
+    }
+
+    action("pause")->setEnabled(true);
+    action("stop")->setEnabled(true);
+    action("forward")->setEnabled(true);
+    if(action<KToggleAction>("albumRandomPlay")->isChecked())
+        action("forwardAlbum")->setEnabled(true);
+    action("back")->setEnabled(true);
+
+    if(m_sliderAction->trackPositionSlider())
+        m_sliderAction->trackPositionSlider()->setEnabled(true);
+
+    m_timer->start(m_pollInterval);
+
+    emit signalPlay();
+}
+
+void PlayerManager::play(const QString &file)
+{
+    CollectionListItem *item = CollectionList::instance()->lookup(file);
+    if(item) {
+        Playlist::setPlaying(item);
+        play(item->file());
+    }
+}
+
+void PlayerManager::play()
+{
+    play(FileHandle::null());
+}
+
+void PlayerManager::pause()
+{
+    if(!player())
+        return;
+
+    if(player()->paused()) {
+        play();
+        return;
+    }
+
+    m_timer->stop();
+    action("pause")->setEnabled(false);
+
+    player()->pause();
+
+    emit signalPause();
+}
+
+void PlayerManager::stop()
+{
+    if(!player() || !m_playlistInterface)
+        return;
+
+    m_timer->stop();
+
+    action("pause")->setEnabled(false);
+    action("stop")->setEnabled(false);
+    action("back")->setEnabled(false);
+    action("forward")->setEnabled(false);
+    action("forwardAlbum")->setEnabled(false);
+
+    if(m_sliderAction->trackPositionSlider()) {
+        m_sliderAction->trackPositionSlider()->setValue(0);
+        m_sliderAction->trackPositionSlider()->setEnabled(false);
+    }
+
+    player()->stop();
+    m_playlistInterface->stop();
+
+    m_file = FileHandle::null();
+
+    emit signalStop();
+}
+
+void PlayerManager::setVolume(float volume)
+{
+    if(!player())
+        return;
+
+    player()->setVolume(volume);
+}
+
+void PlayerManager::seek(int seekTime)
+{
+    if(!player())
+        return;
+
+    player()->seek(seekTime);
+}
+
+void PlayerManager::seekPosition(int position)
+{
+    if(!player())
+        return;
+
+    if(!player()->playing() || m_noSeek)
+        return;
+
+    slotUpdateTime(position);
+    player()->seekPosition(position);
+
+    if(m_sliderAction->trackPositionSlider())
+        m_sliderAction->trackPositionSlider()->setValue(position);
+}
+
+void PlayerManager::seekForward()
+{
+    seekPosition(kMin(SliderAction::maxPosition, position() + 10));
+}
+
+void PlayerManager::seekBack()
+{
+    seekPosition(kMax(SliderAction::minPosition, position() - 10));
+}
+
+void PlayerManager::playPause()
+{
+    playing() ? action("pause")->activate() : action("play")->activate();
+}
+
+void PlayerManager::forward()
+{
+    m_playlistInterface->playNext();
+    FileHandle file = m_playlistInterface->currentFile();
+
+    if(!file.isNull())
+        play(file);
+    else
+        stop();
+}
+
+void PlayerManager::back()
+{
+    m_playlistInterface->playPrevious();
+    FileHandle file = m_playlistInterface->currentFile();
+
+    if(!file.isNull())
+        play(file);
+    else
+        stop();
+}
+
+void PlayerManager::volumeUp()
+{
+    if(!player() || !m_sliderAction || !m_sliderAction->volumeSlider())
+        return;
+
+    int volume = m_sliderAction->volumeSlider()->volume() +
+        m_sliderAction->volumeSlider()->maxValue() / 25; // 4% up
+
+    slotSetVolume(volume);
+    m_sliderAction->volumeSlider()->setVolume(volume);
+}
+
+void PlayerManager::volumeDown()
+{
+    if(!player() || !m_sliderAction || !m_sliderAction->volumeSlider())
+        return;
+
+    int volume = m_sliderAction->volumeSlider()->value() -
+        m_sliderAction->volumeSlider()->maxValue() / 25; // 4% down
+
+    slotSetVolume(volume);
+    m_sliderAction->volumeSlider()->setVolume(volume);
+}
+
+void PlayerManager::mute()
+{
+    if(!player() || !m_sliderAction || !m_sliderAction->volumeSlider())
+        return;
+
+    slotSetVolume(m_muted ? m_sliderAction->volumeSlider()->value() : 0);
+    m_muted = !m_muted;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// private slots
+////////////////////////////////////////////////////////////////////////////////
+
+void PlayerManager::slotPollPlay()
+{
+    if(!player() || !m_playlistInterface)
+        return;
+
+    m_noSeek = true;
+
+    if(!player()->playing()) {
+        m_timer->stop();
+
+        m_playlistInterface->playNext();
+        FileHandle nextFile = m_playlistInterface->currentFile();
+        if(!nextFile.isNull())
+            play(nextFile);
+        else
+            stop();
+    }
+    else if(!m_sliderAction->dragging()) {
+        if(m_sliderAction->trackPositionSlider())
+            m_sliderAction->trackPositionSlider()->setValue(player()->position());
+
+        if(m_statusLabel) {
+            m_statusLabel->setItemTotalTime(player()->totalTime());
+            m_statusLabel->setItemCurrentTime(player()->currentTime());
+        }
+    }
+
+    // This call is done because when the user adds the slider to the toolbar
+    // while playback is occuring the volume slider generally defaults to 0,
+    // and doesn't get updated to the correct volume.  It might be better to
+    // have the SliderAction class fill in the correct volume, but I'm trying
+    // to avoid having it depend on PlayerManager since it may not be
+    // constructed in time during startup. -mpyne
+
+    if(!m_sliderAction->volumeDragging() && m_sliderAction->volumeSlider())
+    {
+        int maxV = m_sliderAction->volumeSlider()->maxValue();
+        float v = sqrt(sqrt(volume())); // Cancel out exponential scaling
+
+        m_sliderAction->volumeSlider()->blockSignals(true);
+        m_sliderAction->volumeSlider()->setVolume((int)((v) * maxV));
+        m_sliderAction->volumeSlider()->blockSignals(false);
+    }
+
+    // Ok, this is weird stuff, but it works pretty well.  Ordinarily we don't
+    // need to check up on our playing time very often, but in the span of the
+    // last interval, we want to check a lot -- to figure out that we've hit the
+    // end of the song as soon as possible.
+
+    if(player()->playing() &&
+       player()->totalTime() > 0 &&
+       float(player()->totalTime() - player()->currentTime()) < m_pollInterval * 2)
+    {
+        m_timer->changeInterval(50);
+    }
+
+    m_noSeek = false;
+}
+
+void PlayerManager::slotSetOutput(const QString &system)
+{
+    stop();
+    setOutput(system);
+    setup();
+}
+
+void PlayerManager::setOutput(const QString &system)
+{
+    delete m_player;
+    if(system == i18n("aRts"))
+        m_player = createPlayer(ArtsBackend);
+    else if(system == i18n("GStreamer"))
+        m_player = createPlayer(GStreamerBackend);
+    else if(system == i18n("aKode"))
+        m_player = createPlayer(AkodeBackend);
+}
+
+void PlayerManager::slotSetVolume(int volume)
+{
+    float scaledVolume;
+
+    if(m_sliderAction->volumeSlider())
+        scaledVolume = float(volume) / m_sliderAction->volumeSlider()->maxValue();
+    else {
+        scaledVolume = float(volume) / 100.0; // Hopefully this is accurate
+        scaledVolume = kMin(1.0f, scaledVolume);
+    }
+
+    // Perform exponential scaling to counteract the fact that humans perceive
+    // volume changes logarithmically.
+
+    scaledVolume *= scaledVolume;
+    scaledVolume *= scaledVolume;
+    setVolume(scaledVolume); // scaledVolume ^ 4
+}
+
+void PlayerManager::slotUpdateTime(int position)
+{
+    if(!m_statusLabel)
+        return;
+
+    float positionFraction = float(position) / SliderAction::maxPosition;
+    float totalTime = float(player()->totalTime());
+    int seekTime = int(positionFraction * totalTime + 0.5); // "+0.5" for rounding
+
+    m_statusLabel->setItemCurrentTime(seekTime);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// private members
+////////////////////////////////////////////////////////////////////////////////
+
+Player *PlayerManager::player() const
+{
+    if(!m_player)
+        instance()->setup();
+
+    return m_player;
+}
+
+void PlayerManager::setup()
+{
+    // All of the actions required by this class should be listed here.
+
+    if(!action("pause") ||
+       !action("stop") ||
+       !action("back") ||
+       !action("forwardAlbum") ||
+       !action("forward") ||
+       !action("trackPositionAction"))
+    {
+        kdWarning(65432) << k_funcinfo << "Could not find all of the required actions." << endl;
+        return;
+    }
+
+    if(m_setup)
+        return;
+    m_setup = true;
+
+    // initialize action states
+
+    action("pause")->setEnabled(false);
+    action("stop")->setEnabled(false);
+    action("back")->setEnabled(false);
+    action("forward")->setEnabled(false);
+    action("forwardAlbum")->setEnabled(false);
+
+    // setup sliders
+
+    m_sliderAction = action<SliderAction>("trackPositionAction");
+
+    connect(m_sliderAction, SIGNAL(signalPositionChanged(int)),
+            this, SLOT(seekPosition(int)));
+    connect(m_sliderAction->trackPositionSlider(), SIGNAL(valueChanged(int)),
+            this, SLOT(slotUpdateTime(int)));
+    connect(m_sliderAction, SIGNAL(signalVolumeChanged(int)),
+            this, SLOT(slotSetVolume(int)));
+
+    // Call this method manually to avoid warnings.
+
+    KAction *outputAction = actions()->action("outputSelect");
+
+    if(outputAction) {
+        setOutput(static_cast<KSelectAction *>(outputAction)->currentText());
+        connect(outputAction, SIGNAL(activated(const QString &)), this, SLOT(slotSetOutput(const QString &)));
+    }
+    else
+        m_player = createPlayer();
+
+    float volume;
+    
+    if(m_sliderAction->volumeSlider()) {
+        volume = 
+            float(m_sliderAction->volumeSlider()->volume()) /
+            float(m_sliderAction->volumeSlider()->maxValue());
+    }
+    else
+        volume = 1; // Assume user wants full volume
+
+    m_player->setVolume(volume);
+
+    m_timer = new QTimer(this, "play timer");
+    connect(m_timer, SIGNAL(timeout()), this, SLOT(slotPollPlay()));
+}
+
+QString PlayerManager::randomPlayMode() const
+{
+    if(action<KToggleAction>("randomPlay")->isChecked())
+        return "Random";
+    if(action<KToggleAction>("albumRandomPlay")->isChecked())
+        return "AlbumRandom";
+    return "NoRandom";
+}
+
+void PlayerManager::setRandomPlayMode(const QString &randomMode)
+{
+    if(randomMode.lower() == "random")
+        action<KToggleAction>("randomPlay")->setChecked(true);
+    if(randomMode.lower() == "albumrandom")
+        action<KToggleAction>("albumRandomPlay")->setChecked(true);
+    if(randomMode.lower() == "norandom")
+        action<KToggleAction>("disableRandomPlay")->setChecked(true);
+}
+
+#include "playermanager.moc"
+
+// vim: set et ts=4 sw=4: