this feature will not last very long, its too hard to maintain, sometimes segfaults when encoder is finised or stops ?

moved into seperate folder, and cleaned up some components

CMakeLists.txt

@@ -38,7 +38,10 @@ set(SOURCES
     src/engine/SpectrumAnalyzer.cpp
     src/engine/MusicLibrary.cpp
     src/engine/MetadataReader.cpp
-    src/engine/AlbumReencoder.cpp
+    # engine/encoder
+    src/engine/encoder/AlbumReencoder.cpp
+    src/engine/encoder/TrackEncoder.cpp
+    src/engine/encoder/StageBuffer.cpp
     # ffmpeg
     src/engine/ffmpeg/FormatContext.cpp
     src/engine/ffmpeg/CodecContext.cpp
@@ -74,8 +77,13 @@ set(HEADERS
     src/engine/Track.h
     src/engine/MetadataReader.h
     src/engine/MusicLibrary.h
-    src/engine/ReencodeJob.h
-    src/engine/AlbumReencoder.h
+    # engine/encoder
+    src/engine/encoder/ReencodeJob.h
+    src/engine/encoder/AlbumReencoder.h
+    src/engine/encoder/TrackEncoder.h
+    src/engine/encoder/StageBuffer.h
+    src/engine/encoder/FfmpegGuards.h
+    src/engine/encoder/SampleRateUtils.h
     # ffmpeg wrapper
     src/engine/ffmpeg/FormatContext.h
     src/engine/ffmpeg/CodecContext.h
@@ -111,6 +119,7 @@ target_include_directories(SubWave PRIVATE
     src/config
     src/controllers
     src/engine
+    src/engine/encoder
     src/engine/ffmpeg
     src/playlists
     src/gui