void PlayPanel::setScore(Score* s)
      {
      if (cs != 0 && cs == s)
            return;
      cs = s;
      bool enable = cs != 0;
      volumeSlider->setEnabled(enable);
      posSlider->setEnabled(enable);
      tempoSlider->setEnabled(enable);
      if (cs && seq && seq->canStart()) {
            setTempo(cs->tempomap()->tempo(0));
            setRelTempo(cs->tempomap()->relTempo());
            setEndpos(cs->repeatList()->ticks());
            int tick = cs->playPos();
            heartBeat(tick, tick, 0);
            }
      else {
            setTempo(120.0);
            setRelTempo(1.0);
            setEndpos(0);
            heartBeat(0, 0, 0);
            updatePosLabel(0);
            }
      update();
      }

Song::Song() :
	TrackContainer(),
	m_globalAutomationTrack( dynamic_cast<AutomationTrack *>(
				Track::create( Track::HiddenAutomationTrack,
								this ) ) ),
	m_tempoModel( DefaultTempo, MinTempo, MaxTempo, this, tr( "Tempo" ) ),
	m_timeSigModel( this ),
	m_oldTicksPerTact( DefaultTicksPerTact ),
	m_masterVolumeModel( 100, 0, 200, this, tr( "Master volume" ) ),
	m_masterPitchModel( 0, -12, 12, this, tr( "Master pitch" ) ),
	m_fileName(),
	m_oldFileName(),
	m_modified( false ),
	m_loadOnLaunch( true ),
	m_recording( false ),
	m_exporting( false ),
	m_exportLoop( false ),
	m_renderBetweenMarkers( false ),
	m_playing( false ),
	m_paused( false ),
	m_loadingProject( false ),
	m_isCancelled( false ),
	m_playMode( Mode_None ),
	m_length( 0 ),
	m_patternToPlay( NULL ),
	m_loopPattern( false ),
	m_elapsedTicks( 0 ),
	m_elapsedTacts( 0 ),
	m_loopRenderCount(1),
	m_loopRenderRemaining(1)
{
	for(int i = 0; i < Mode_Count; ++i) m_elapsedMilliSeconds[i] = 0;
	connect( &m_tempoModel, SIGNAL( dataChanged() ),
			this, SLOT( setTempo() ), Qt::DirectConnection );
	connect( &m_tempoModel, SIGNAL( dataUnchanged() ),
			this, SLOT( setTempo() ), Qt::DirectConnection );
	connect( &m_timeSigModel, SIGNAL( dataChanged() ),
			this, SLOT( setTimeSignature() ), Qt::DirectConnection );


	connect( Engine::mixer(), SIGNAL( sampleRateChanged() ), this,
						SLOT( updateFramesPerTick() ) );

	connect( &m_masterVolumeModel, SIGNAL( dataChanged() ),
			this, SLOT( masterVolumeChanged() ), Qt::DirectConnection );
/*	connect( &m_masterPitchModel, SIGNAL( dataChanged() ),
			this, SLOT( masterPitchChanged() ) );*/

	qRegisterMetaType<Note>( "Note" );
	setType( SongContainer );
}

VstPlugin::VstPlugin( const QString & _plugin ) :
	m_plugin( _plugin ),
	m_pluginWindowID( 0 ),
	m_embedMethod( gui
			? ConfigManager::inst()->vstEmbedMethod()
			: "headless" ),
	m_version( 0 ),
	m_currentProgram()
{
	if( QDir::isRelativePath( m_plugin ) )
	{
		m_plugin = ConfigManager::inst()->vstDir()  + m_plugin;
	}

	setSplittedChannels( true );

	PE::MachineType machineType;
	try {
		PE::FileInfo peInfo(m_plugin);
		machineType = peInfo.machineType();
	} catch (std::runtime_error& e) {
		qCritical() << "Error while determining PE file's machine type: " << e.what();
		machineType = PE::MachineType::unknown;
	}

	switch(machineType)
	{
	case PE::MachineType::amd64:
		tryLoad( REMOTE_VST_PLUGIN_FILEPATH_64 ); // Default: RemoteVstPlugin64
		break;
	case PE::MachineType::i386:
		tryLoad( REMOTE_VST_PLUGIN_FILEPATH_32 ); // Default: 32/RemoteVstPlugin32
		break;
	default:
		m_failed = true;
		return;
	}

	setTempo( Engine::getSong()->getTempo() );

	connect( Engine::getSong(), SIGNAL( tempoChanged( bpm_t ) ),
			this, SLOT( setTempo( bpm_t ) ) );
	connect( Engine::mixer(), SIGNAL( sampleRateChanged() ),
				this, SLOT( updateSampleRate() ) );

	// update once per second
	m_idleTimer.start( 1000 );
	connect( &m_idleTimer, SIGNAL( timeout() ),
				this, SLOT( idleUpdate() ) );
}

void MsScWriter::trailer()
      {
      qDebug() << "MsScWriter::trailer()"
      ;

      if (tempo) setTempo(score, tempo);
      }

void TempoText::read(XmlReader& e)
      {
      while (e.readNextStartElement()) {
            const QStringRef& tag(e.name());
            if (tag == "tempo")
                  setTempo(e.readDouble());
            else if (tag == "followText")
                  _followText = e.readInt();
            else if (!Text::readProperties(e))
                  e.unknown();
            }
      if (score()->mscVersion() <= 114) {
            //
            // Reset text in old version to
            // style.
            //
//TODO            if (textStyle() != TextStyleType::INVALID) {
//                  setStyled(true);
//                  styleChanged();
//                  }
            }
      // check sanity
      if (xmlText().isEmpty()) {
            setXmlText(QString("<sym>metNoteQuarterUp</sym> = %1").arg(lrint(60 * _tempo)));
            setVisible(false);
            }
      }

void GuitarPro5::readMeasures(int /*startingTempo*/)
      {
      Measure* measure = score->firstMeasure();
      bool mixChange = false;
      for (int bar = 0; bar < measures; ++bar, measure = measure->nextMeasure()) {
            const GpBar& gpbar = bars[bar];

            if (!gpbar.marker.isEmpty()) {
                  Text* s = new RehearsalMark(score);
                  s->setText(gpbar.marker.trimmed());
                  s->setTrack(0);
                  Segment* segment = measure->getSegment(Segment::Type::ChordRest, measure->tick());
                  segment->add(s);
                  }

            Tuplet* tuplets[staves * 2];     // two voices
            for (int track = 0; track < staves*2; ++track)
                  tuplets[track] = 0;

            for (int staffIdx = 0; staffIdx < staves; ++staffIdx) {
                  readMeasure(measure, staffIdx, tuplets, mixChange);
                  if (!(((bar == (measures-1)) && (staffIdx == (staves-1))))) {
                        /*int a = */  readChar();
                        // qDebug("    ======skip %02x", a);
                        }
                  }
            if (bar == 1 && !mixChange)
                  setTempo(tempo, score->firstMeasure());
            }
      }

bool MidiParser_SH::loadMusic(byte *musData, uint32 musDataSize) {
	Common::StackLock lock(_mutex);

	debugC(kDebugLevelMusic, "Music: loadMusic()");
	unloadMusic();

	_musData     = musData;
	_musDataSize = musDataSize;

	byte  *headerPtr = _musData + 12; // skip over the already checked SPACE header
	byte  *pos       = headerPtr;

	uint16 headerSize = READ_LE_UINT16(headerPtr);
	assert(headerSize == 0x7F); // Security check

	// Skip over header
	pos += headerSize;

	_lastEvent = 0;
	_trackEnd = _musData + _musDataSize;

	_numTracks = 1;
	_tracks[0] = pos;
	
	_ppqn = 1;
	setTempo(16667);
	setTrack(0);

	return true;
}

void PlayPanel::relTempoChanged(double d, int)
      {
      double relTempo = d * .01;
      emit relTempoChanged(relTempo);

      setTempo(seq->curTempo() * relTempo);
      setRelTempo(relTempo);
      }

song::song() :
	TrackContainer(),
	m_globalAutomationTrack( dynamic_cast<AutomationTrack *>(
				track::create( track::HiddenAutomationTrack,
								this ) ) ),
	m_tempoModel( DefaultTempo, MinTempo, MaxTempo, this, tr( "Tempo" ) ),
	m_timeSigModel( this ),
	m_oldTicksPerTact( DefaultTicksPerTact ),
	m_masterVolumeModel( 100, 0, 200, this, tr( "Master volume" ) ),
	m_masterPitchModel( 0, -12, 12, this, tr( "Master pitch" ) ),
	m_fileName(),
	m_oldFileName(),
	m_modified( false ),
	m_recording( false ),
	m_exporting( false ),
	m_exportLoop( false ),
	m_playing( false ),
	m_paused( false ),
	m_loadingProject( false ),
	m_playMode( Mode_None ),
	m_length( 0 ),
	m_trackToPlay( NULL ),
	m_patternToPlay( NULL ),
	m_loopPattern( false ),
	m_elapsedMilliSeconds( 0 ),
	m_elapsedTicks( 0 ),
	m_elapsedTacts( 0 )
{
	connect( &m_tempoModel, SIGNAL( dataChanged() ),
						this, SLOT( setTempo() ) );
	connect( &m_tempoModel, SIGNAL( dataUnchanged() ),
						this, SLOT( setTempo() ) );
	connect( &m_timeSigModel, SIGNAL( dataChanged() ),
					this, SLOT( setTimeSignature() ) );


	connect( engine::mixer(), SIGNAL( sampleRateChanged() ), this,
						SLOT( updateFramesPerTick() ) );

	connect( &m_masterVolumeModel, SIGNAL( dataChanged() ),
			this, SLOT( masterVolumeChanged() ) );
/*	connect( &m_masterPitchModel, SIGNAL( dataChanged() ),
			this, SLOT( masterPitchChanged() ) );*/

	qRegisterMetaType<note>( "note" );
}

void Song::clear( void )
{
	for( int i = 0; i < SongMaxChan; ++i ) channels[ i ]->clear();
	startpat = 0;
	loopactive = true;
	looppos = 1;
	loopdest = 0;
	setTempo( 140 );
}

MidiClockClass::MidiClockClass() {
  init();
  mode = OFF;
  setTempo(120);
  on96Callback = NULL;
  on32Callback = NULL;
  on16Callback = NULL;
  transmit = false;
}

void MainWindow::on_action_Set_Tempo_triggered()
{
	bool ok;
	int tempo = QInputDialog::getInteger(this, tr("Set Tempo"),
	            tr("Beats Per Minute:"), 60,
	            30, 120, 1, &ok);
	if (ok)
		setTempo(tempo);
}

void SequencerController::prepare( float aQueuedTempo, int aTimeSigBeatAmount, int aTimeSigBeatUnit )
{
    // calculate buffers and ranges
    if ( aQueuedTempo > 0 )
    {
        setTempo( aQueuedTempo, aTimeSigBeatAmount, aTimeSigBeatUnit );
        AudioEngine::handleTempoUpdate( aQueuedTempo, false );   // just to initialize all buffer sizes
        setLoopRange( 0, ( AudioEngine::amount_of_bars * AudioEngine::samples_per_bar ) - 1, stepsPerBar );
    }
};

void setTempoFromMidiBytes(const byte* bytes) {
  double tempo = 0.0;
  unsigned long beatLengthInMicroseconds = 0;
  if(bytes != NULL) {
    beatLengthInMicroseconds = 0x00000000 | (bytes[0] << 16) | (bytes[1] << 8) | (bytes[2]);
    // Convert beats / microseconds -> beats / minutes
    tempo = (1000000.0 / (double)beatLengthInMicroseconds) * 60.0;
    setTempo(tempo);
  }
}

void PlayPanel::relTempoChanged(double d, int)
      {
      double relTempo = d * .01;
      emit relTempoChanged(relTempo);
      // Snap tempo slider to 100% when it gets close
      if (relTempo < 1.01 && relTempo > 0.99) {
            relTempo = 1.00;
            }
      setTempo(seq->curTempo() * relTempo);
      setRelTempo(relTempo);
      }

bool MainWindow::setupExercise()
{
	connect(exercise_, SIGNAL(updateMain(MainWindowStates)),
	        this, SLOT(updateMain(MainWindowStates)));
	attemptRunningBool = false;
	exercise_->setup(centralwidget);
	exercise_->setUserInfo(user_);
	setupBackend();
	setTempo(game_->getTempo());
	return true;
}

MidiParser_SH::MidiParser_SH() {
	_ppqn = 1;
	setTempo(16667);
	_data = nullptr;
	_beats = 0;
	_lastEvent = 0;
	_trackEnd = nullptr;

	_musData     = nullptr;
	_musDataSize = 0;
}

bool MidiParser_S1D::loadMusic(byte *data, uint32 size) {
	unloadMusic();

	if (!size)
		return false;

	// The original actually just ignores the first two bytes.
	byte *pos = data;
	if (*pos == 0xFC) {
		// SysEx found right at the start
		// this seems to happen since Elvira 2, we ignore it
		// 3rd byte after the SysEx seems to be saved into a global

		// We expect at least 4 bytes in total
		if (size < 4)
			return false;

		byte skipOffset = pos[2]; // get second byte after the SysEx
		// pos[1] seems to have been ignored
		// pos[3] is saved into a global inside the original interpreters

		// Waxworks + Simon 1 demo typical header is:
		//  0xFC 0x29 0x07 0x01 [0x00/0x01]
		// Elvira 2 typical header is:
		//  0xFC 0x04 0x06 0x06

		if (skipOffset >= 6) {
			// should be at least 6, so that we skip over the 2 size bytes and the
			// smallest SysEx possible
			skipOffset -= 2; // 2 size bytes were already read by previous code outside of this method

			if (size <= skipOffset) // Skip to the end of file? -> something is not correct
				return false;

			// Do skip over the bytes
			pos += skipOffset;
		} else {
			warning("MidiParser_S1D: unexpected skip offset in music file");
		}
	}

	// And now we're at the actual data. Only one track.
	_numTracks = 1;
	_data = pos;
	_tracks[0] = pos;

	// Note that we assume the original data passed in
	// will persist beyond this call, i.e. we do NOT
	// copy the data to our own buffer. Take warning....
	resetTracking();
	setTempo(666667);
	setTrack(0);
	return true;
}

VstPlugin::VstPlugin( const QString & _plugin ) :
	RemotePlugin(),
	JournallingObject(),
	m_plugin( _plugin ),
	m_pluginWidget( NULL ),
	m_pluginWindowID( 0 ),
	m_badDllFormat( false ),
	m_name(),
	m_version( 0 ),
	m_vendorString(),
	m_productString(),
	m_currentProgramName(),
	m_allProgramNames(),
	p_name(),
	m_currentProgram(),
	m_idleTimer()
{
	setSplittedChannels( true );

	tryLoad( REMOTE_VST_PLUGIN_FILEPATH );
#ifdef LMMS_BUILD_WIN64
	if( m_badDllFormat )
	{
		m_badDllFormat = false;
		tryLoad( "32/RemoteVstPlugin32" );
	}
#endif

	setTempo( Engine::getSong()->getTempo() );

	connect( Engine::getSong(), SIGNAL( tempoChanged( bpm_t ) ),
			this, SLOT( setTempo( bpm_t ) ) );
	connect( Engine::mixer(), SIGNAL( sampleRateChanged() ),
				this, SLOT( updateSampleRate() ) );

	// update once per second
	m_idleTimer.start( 1000 );
	connect( &m_idleTimer, SIGNAL( timeout() ),
				this, SLOT( idleUpdate() ) );
}

void qtractorTempoSpinBox::stepBy ( int iSteps )
{
#ifdef CONFIG_DEBUG_0
	qDebug("qtractorTempoSpinBox[%p]::stepBy(%d)", this, iSteps);
#endif

	QLineEdit *pLineEdit = QAbstractSpinBox::lineEdit();
	const int iCursorPos = pLineEdit->cursorPosition();
	const QString& sText = pLineEdit->text();
	if (iCursorPos < sText.section(' ', 0, 0).length() + 1) {
		const QChar& decp = QLocale().decimalPoint();
		if (iCursorPos > sText.section(decp, 0, 0).length())
			setTempo(tempo() + 0.1f * float(iSteps));
		else
			setTempo(tempo() + float(iSteps));
	}
	else
	if (iCursorPos > sText.section('/', 0, 0).length())
		setBeatDivisor(int(beatDivisor()) + iSteps);
	else
		setBeatsPerBar(int(beatsPerBar()) + iSteps);
}