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tdemultimedia/juk/playermanager.cpp

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/***************************************************************************
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 <tdelocale.h>
#include <tqslider.h>
#include <tqtimer.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();
}
TQStringList PlayerManager::trackProperties()
{
return FileHandle::properties();
}
TQString PlayerManager::trackProperty(const TQString &property) const
{
if(!playing() && !paused())
return TQString();
return m_file.property(property);
}
TQPixmap PlayerManager::trackCover(const TQString &size) const
{
if(!playing() && !paused())
return TQPixmap();
if(size.lower() == "small")
return m_file.coverInfo()->pixmap(CoverInfo::Thumbnail);
if(size.lower() == "large")
return m_file.coverInfo()->pixmap(CoverInfo::FullSize);
return TQPixmap();
}
FileHandle PlayerManager::playingFile() const
{
return m_file;
}
TQString PlayerManager::playingString() const
{
if(!playing())
return TQString();
TQString 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;
}
TDESelectAction *PlayerManager::playerSelectAction(TQObject *parent) // static
{
TDESelectAction *action = 0;
action = new TDESelectAction(i18n("&Output To"), 0, parent, "outputSelect");
TQStringList 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<TDEToggleAction>("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 TQString &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::forwardAlbum()
{
m_playlistInterface->playNextAlbum();
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 TQString &system)
{
stop();
setOutput(system);
setup();
}
void PlayerManager::setOutput(const TQString &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, TQ_SIGNAL(signalPositionChanged(int)),
this, TQ_SLOT(seekPosition(int)));
connect(m_sliderAction->trackPositionSlider(), TQ_SIGNAL(valueChanged(int)),
this, TQ_SLOT(slotUpdateTime(int)));
connect(m_sliderAction, TQ_SIGNAL(signalVolumeChanged(int)),
this, TQ_SLOT(slotSetVolume(int)));
// Call this method manually to avoid warnings.
TDEAction *outputAction = actions()->action("outputSelect");
if(outputAction) {
setOutput(static_cast<TDESelectAction *>(outputAction)->currentText());
connect(outputAction, TQ_SIGNAL(activated(const TQString &)), this, TQ_SLOT(slotSetOutput(const TQString &)));
}
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 TQTimer(this, "play timer");
connect(m_timer, TQ_SIGNAL(timeout()), this, TQ_SLOT(slotPollPlay()));
}
TQString PlayerManager::randomPlayMode() const
{
if(action<TDEToggleAction>("randomPlay")->isChecked())
return "Random";
if(action<TDEToggleAction>("albumRandomPlay")->isChecked())
return "AlbumRandom";
return "NoRandom";
}
void PlayerManager::setRandomPlayMode(const TQString &randomMode)
{
if(randomMode.lower() == "random")
action<TDEToggleAction>("randomPlay")->setChecked(true);
if(randomMode.lower() == "albumrandom")
action<TDEToggleAction>("albumRandomPlay")->setChecked(true);
if(randomMode.lower() == "norandom")
action<TDEToggleAction>("disableRandomPlay")->setChecked(true);
}
#include "playermanager.moc"
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