timeline: heavily optimized and improved nearly all timeline optimizations

Features a lot of timeline-related cache optimizations as well as general
optimizations and improvements in timeline behavior. Should improve
usability significantly.

app/common/CMakeLists.txt

@@ -42,7 +42,6 @@ set(OLIVE_SOURCES
   common/threadedobject.cpp
   common/timecodefunctions.h
   common/timecodefunctions.cpp
-  common/timelinecommon.h
   common/timerange.h
   common/timerange.cpp
   common/tohex.h

app/common/timelinecommon.h

@@ -1,50 +0,0 @@
-/***
-
-  Olive - Non-Linear Video Editor
-  Copyright (C) 2019 Olive Team
-
-  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 3 of the License, or
-  (at your option) any later version.
-
-  This program is distributed in the hope that it will be useful,
-  but WITHOUT ANY WARRANTY; without even the implied warranty of
-  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-  GNU General Public License for more details.
-
-  You should have received a copy of the GNU General Public License
-  along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-***/
-
-#ifndef TIMELINECOMMON_H
-#define TIMELINECOMMON_H
-
-#include "common/define.h"
-
-OLIVE_NAMESPACE_ENTER
-
-class Timeline {
-public:
-  enum MovementMode {
-    kNone,
-    kMove,
-    kTrimIn,
-    kTrimOut
-  };
-
-  enum TrackType {
-    kTrackTypeNone = -1,
-    kTrackTypeVideo,
-    kTrackTypeAudio,
-    kTrackTypeSubtitle,
-    kTrackTypeCount
-  };
-
-  static bool IsATrimMode(MovementMode mode) {return mode == kTrimIn || mode == kTrimOut;}
-};
-
-OLIVE_NAMESPACE_EXIT
-
-#endif // TIMELINECOMMON_H