Add disable vsync and custom tickrate options

src/overlaycontroller.h

@@ -72,12 +72,17 @@ constexpr int k_utilitiesSettingsUpdateCounter = 19;
 // k_nonVsyncTickRate determines number of ms we wait to force the next event
 // loop tick when vsync is too late due to dropped frames.
 constexpr int k_nonVsyncTickRate = 20;
+constexpr int k_maxCustomTickRate = 999;
 constexpr int k_hmdRotationCounterUpdateRate = 7;
 
 class OverlayController : public QObject
 {
     Q_OBJECT
     Q_PROPERTY( bool m_desktopMode READ isDesktopMode )
+    Q_PROPERTY( bool vsyncDisabled READ vsyncDisabled WRITE setVsyncDisabled
+                    NOTIFY vsyncDisabledChanged )
+    Q_PROPERTY( int customTickRateMs READ customTickRateMs WRITE
+                    setCustomTickRateMs NOTIFY customTickRateMsChanged )
 
 private:
     vr::VROverlayHandle_t m_ulOverlayHandle = vr::k_ulOverlayHandleInvalid;
@@ -99,6 +104,8 @@ private:
 
     bool m_desktopMode;
     bool m_noSound;
+    bool m_vsyncDisabled = false;
+    int m_customTickRateMs = 20;
 
     QUrl m_runtimePathUrl;
 
@@ -111,6 +118,7 @@ private:
     uint64_t m_currentFrame = 0;
     uint64_t m_lastFrame = 0;
     int m_vsyncTooLateCounter = 0;
+    int m_customTickRateCounter = 0;
 
     input::SteamIVRInput m_actions;
 
@@ -194,6 +202,9 @@ public:
                         vr::VREvent_t* pEvent );
     void mainEventLoop();
 
+    bool vsyncDisabled() const;
+    int customTickRateMs() const;
+
 public slots:
     void renderOverlay();
     void OnRenderRequest();
@@ -207,8 +218,13 @@ public slots:
     void setAlarm01SoundVolume( float vol );
     void cancelAlarm01Sound();
 
+    void setVsyncDisabled( bool value, bool notify = true );
+    void setCustomTickRateMs( int value, bool notify = true );
+
 signals:
     void keyBoardInputSignal( QString input, unsigned long userValue = 0 );
+    void vsyncDisabledChanged( bool value );
+    void customTickRateMsChanged( int value );
 
 private:
     static QSettings* _appSettings;