refactor ffmpeg super class into more maintainable package, cmake is catigorized now ; removed old engine, replaced with new one

CMakeLists.txt

@@ -4,81 +4,107 @@ project(SubWave LANGUAGES CXX)
 set(CMAKE_CXX_STANDARD 20)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
-find_package(Qt6 REQUIRED COMPONENTS Widgets Multimedia OpenGL OpenGLWidgets Core)
+set(CMAKE_AUTOMOC ON)
+set(CMAKE_AUTORCC ON)
+
+# dependencies
+find_package(Qt6 REQUIRED COMPONENTS
+    Core Widgets Multimedia OpenGL OpenGLWidgets
+)
 
-# require ffmpeg
 find_package(PkgConfig REQUIRED)
+
 pkg_check_modules(FFMPEG REQUIRED IMPORTED_TARGET
     libavformat
     libavcodec
     libavutil
     libswresample
 )
-# require fftw (fourier transform)
+
 pkg_check_modules(FFTW REQUIRED IMPORTED_TARGET fftw3)
 
-set(CMAKE_AUTOMOC ON)
-set(CMAKE_AUTORCC ON)
-
-# source files
+# sources
 set(SOURCES
     src/main.cpp
     src/MetadataReader.cpp
     src/Config.cpp
-    src/engine/AudioEngine.cpp
-    src/engine/FFmpegDecoder.cpp
-    src/engine/EqProcessor.cpp
-    src/engine/SpectrumAnalyzer.cpp
     src/MusicLibrary.cpp
     src/CoverArtWidget.cpp
     src/SpectrogramWidget.cpp
     src/GradientDialog.cpp
     src/EqualizerWidget.cpp
     src/TrackDelegate.cpp
+    src/MainWindow.cpp
+
+    # engine
+    src/engine/AudioEngine.cpp
+    src/engine/EqProcessor.cpp
+    src/engine/SpectrumAnalyzer.cpp
+
+    # ffmpeg
+    src/engine/ffmpeg/FormatContext.cpp
+    src/engine/ffmpeg/CodecContext.cpp
+    src/engine/ffmpeg/Resampler.cpp
+    src/engine/ffmpeg/FFmpegDecoder.cpp
+
+    # playlists
     src/playlists/PlaylistModel.cpp
     src/playlists/PlaylistManager.cpp
     src/playlists/PlaylistCreatorDialog.cpp
     src/playlists/PlaylistBrowserDialog.cpp
-    src/MainWindow.cpp
 )
 
 set(HEADERS
     src/Track.h
     src/MetadataReader.h
     src/Config.h
-    src/engine/AudioEngine.h
     src/MusicLibrary.h
     src/CoverArtWidget.h
     src/SpectrogramWidget.h
     src/GradientDialog.h
     src/EqualizerWidget.h
     src/TrackDelegate.h
+    src/MainWindow.h
+
+    # engine
+    src/engine/AudioEngine.h
+    src/engine/EqProcessor.h
+    src/engine/SpectrumAnalyzer.h
+    src/engine/AudioBuffer.h
+
+    # ffmpeg wrapper
+    src/engine/ffmpeg/FormatContext.h
+    src/engine/ffmpeg/CodecContext.h
+    src/engine/ffmpeg/Resampler.h
+    src/engine/ffmpeg/FFmpegDecoder.h
+
+    # playlists
     src/playlists/PlaylistModel.h
     src/playlists/PlaylistManager.h
     src/playlists/PlaylistCreatorDialog.h
     src/playlists/PlaylistBrowserDialog.h
-    src/MainWindow.h
 )
 
-set(RESOURCES 
+# qrc resources
+set(RESOURCES
     src/shaders.qrc
     src/application.qrc
 )
-# normal platforms
+
+# target
 add_executable(SubWave ${SOURCES} ${HEADERS} ${RESOURCES})
 
-# For windows stupid ahh
-if(WIN32)
-    set_target_properties(SubWave PROPERTIES WIN32_EXECUTABLE TRUE)
-endif()
-
+# headers
 target_include_directories(SubWave PRIVATE
     src
     src/engine
+    src/engine/ffmpeg
     src/playlists
 )
 
+# link to qt and ffmpeg and fftw
 target_link_libraries(SubWave PRIVATE
+    Qt6::Core
     Qt6::Widgets
     Qt6::Multimedia
     Qt6::OpenGL
@@ -86,3 +112,8 @@ target_link_libraries(SubWave PRIVATE
     PkgConfig::FFMPEG
     PkgConfig::FFTW
 )
+
+# For windows stupid ahh
+if(WIN32)
+    set_target_properties(SubWave PROPERTIES WIN32_EXECUTABLE TRUE)
+endif()