restored qt5.15 compatibility

By using quint64 instead if std::uint64_t

seqplayer.cpp

@@ -101,7 +101,6 @@ SequencePlayer::SequencePlayer()
 {
 #if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
     qRegisterMetaType<std::chrono::milliseconds>();
-    qRegisterMetaType<std::uint64_t>();
 #endif
     initChannels();
 }
@@ -280,7 +279,7 @@ void SequencePlayer::playerLoop()
     using TimePoint = Clock::time_point;
     static const std::type_info &beatId = typeid(BeatEvent);
     int currentBar{0};
-    std::uint64_t echoTicks{0};
+    quint64 echoTicks{0};
     microseconds deltaTime{microseconds::zero()}, echoDelta{m_echoResolution};
     TimePoint currentTime{Clock::now()}, nextTime{currentTime}, nextEcho{currentTime},
         startTime{currentTime};
@@ -430,7 +429,7 @@ void SequencePlayer::resetPosition()
     }
 }
 
-void SequencePlayer::setPosition(uint64_t ticks)
+void SequencePlayer::setPosition(quint64 ticks)
 {
     //qDebug() << Q_FUNC_INFO << pos;
     allNotesOff();

seqplayer.h

@@ -28,7 +28,6 @@
 
 #if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
 Q_DECLARE_METATYPE(std::chrono::milliseconds)
-Q_DECLARE_METATYPE(std::uint64_t)
 #endif
 
 class SequencePlayer : public QObject
@@ -56,7 +55,7 @@ class SequencePlayer : public QObject
     int getPitchShift();
     int getVolumeFactor();
     void resetPosition();
-    void setPosition(std::uint64_t ticks);
+    void setPosition(quint64 ticks);
     void setPitchShift(unsigned int pitch);
     void setVolumeFactor(unsigned int vol);
     void allNotesOff();
@@ -90,7 +89,7 @@ public slots:
     void songStarted();
     void songFinished();
     void songStopped();
-    void songEchoTime(std::chrono::milliseconds millis, std::uint64_t ticks);
+    void songEchoTime(std::chrono::milliseconds millis, quint64 ticks);
     void volumeChanged(int channel, qreal newVolume);
     void mutedChanged(int channel, bool);
     void lockedChanged(int channel, bool);
@@ -123,8 +122,8 @@ private slots:
 
     Sequence m_song;
     drumstick::rt::MIDIOutput* m_port;
-    std::uint64_t m_songPositionTicks;
-    std::uint64_t m_echoResolution;
+    quint64 m_songPositionTicks;
+    quint64 m_echoResolution;
     bool m_loopEnabled;
     int m_loopStart;
     int m_loopEnd;