The app is technically functional

src/CMakeLists.txt

@@ -10,6 +10,8 @@ find_package(CURL REQUIRED)
 find_package(OpenSSL REQUIRED)
 find_package(OpenGL REQUIRED)
 find_package(SDL2 REQUIRED)
+find_package(PkgConfig REQUIRED)
+pkg_check_modules(GSTREAMER REQUIRED gstreamer-1.0)
 
 add_subdirectory(external/discord-rpc)
 
@@ -17,6 +19,8 @@ add_executable(ossp MACOSX_BUNDLE
     main.c
     gui/gui_entry.cpp
     configHandler.c
+    player/player.c
+    player/playQueue.cpp
     libopensubsonic/crypto.c
     libopensubsonic/httpclient.c
     libopensubsonic/logger.c
@@ -52,4 +56,6 @@ set_target_properties(ossp PROPERTIES
     MACOSX_BUNDLE_GUI_IDENTIFIER "org.hojuix.ossp"
 )
 
-target_link_libraries(ossp PRIVATE OpenSSL::SSL OpenSSL::Crypto CURL::libcurl SDL2::SDL2 ${OPENGL_LIBRARIES} discord-rpc)
+include_directories(${GSTREAMER_INCLUDE_DIRS})
+
+target_link_libraries(ossp PRIVATE OpenSSL::SSL OpenSSL::Crypto CURL::libcurl SDL2::SDL2 ${OPENGL_LIBRARIES} discord-rpc ${GSTREAMER_LIBRARIES})