Replace BASS with minimp3+kissfft for audio decoding (#177)

This removes the proprietary BASS library and replaces it with:
- minimp3: Header-only MP3 decoder (public domain)
- kissfft: Small FFT library (BSD license)

Benefits:
- No more proprietary dependencies
- Enables universal macOS builds (BASS lacked arm64 support)
- Simpler distribution (no DLLs/dylibs to bundle)

Changes:
- Remove external/bass/ directory and all binaries
- Add external/minimp3/ and external/kissfft/
- Simplify CMakeLists.txt (remove USE_MINIMP3 option)
- Update MusicDecode.c to use only minimp3+kissfft
- Remove BASS_Init from Editor.c
- Update release workflow (no bass.dll copy)
- Update README (remove libbass installation steps)

Closes #157

Author: emoon

.github/workflows/release.yml

@@ -49,7 +49,6 @@ jobs:
       run: |
         New-Item -ItemType Directory -Force -Path package
         Copy-Item build/Release/RocketEditor.exe package/
-        Copy-Item external/bass/win64/bass.dll package/
         Compress-Archive -Path package/* -DestinationPath RocketEditor-Windows.zip
 
     - name: Upload artifact

CMakeLists.txt

@@ -13,6 +13,7 @@ set(VERSION_PATCH "0")
 
 set(CMAKE_INSTALL_PREFIX ${CMAKE_BINARY_DIR})
 
+
 if (APPLE)
 	add_definitions(-DMACOSX -DEMGUI_MACOSX)
 	add_compile_options(-Wall -Wno-format-security -Wno-deprecated-declarations)
@@ -71,19 +72,16 @@ set(RKT_PROJECT_INCLUDES ${RKT_PROJECT_INCLUDES} ${CMAKE_CURRENT_SOURCE_DIR}/ext
 set(RKT_PROJECT_LIBS ${RKT_PROJECT_LIBS} rkt_tinycthread)
 
 ##############################################################################
-# BASS
-set(RKT_PROJECT_INCLUDES ${RKT_PROJECT_INCLUDES} ${CMAKE_SOURCE_DIR}/external/bass)
-if (APPLE)
-	set(RKT_PROJECT_LIBS ${RKT_PROJECT_LIBS} ${CMAKE_SOURCE_DIR}/external/bass/mac/libbass.dylib)
-elseif (UNIX)
-	set(RKT_PROJECT_LIBS ${RKT_PROJECT_LIBS} ${CMAKE_SOURCE_DIR}/external/bass/linux/libbass.so)
-elseif (MSVC)
-	if(CMAKE_SIZEOF_VOID_P EQUAL 8)
-		set(RKT_PROJECT_LIBS ${RKT_PROJECT_LIBS} ${CMAKE_SOURCE_DIR}/external/bass/win64/bass.lib)
-	else()
-		set(RKT_PROJECT_LIBS ${RKT_PROJECT_LIBS} ${CMAKE_SOURCE_DIR}/external/bass/win32/bass.lib)
-	endif()
-endif ()
+# AUDIO DECODING (minimp3+kissfft)
+
+# kissfft library
+add_library(rkt_kissfft ${CMAKE_SOURCE_DIR}/external/kissfft/kiss_fft.c)
+target_include_directories(rkt_kissfft PUBLIC ${CMAKE_SOURCE_DIR}/external/kissfft)
+set(RKT_PROJECT_LIBS ${RKT_PROJECT_LIBS} rkt_kissfft)
+
+# minimp3 is header-only
+set(RKT_PROJECT_INCLUDES ${RKT_PROJECT_INCLUDES} ${CMAKE_SOURCE_DIR}/external/minimp3)
+set(RKT_PROJECT_INCLUDES ${RKT_PROJECT_INCLUDES} ${CMAKE_SOURCE_DIR}/external/kissfft)
 
 ##############################################################################
 # EMGUI
@@ -185,10 +183,6 @@ if (APPLE)
 
 	set_source_files_properties(${RKT_RESOURCES_DATA} PROPERTIES MACOSX_PACKAGE_LOCATION Resources)
 
-	set(OSX_LIB_FILES ${CMAKE_SOURCE_DIR}/external/bass/mac/libbass.dylib)
-	set_source_files_properties(${OSX_LIB_FILES} PROPERTIES MACOSX_PACKAGE_LOCATION MacOS)
-	set(RKT_PROJECT_SRCS ${RKT_PROJECT_SRCS} ${OSX_LIB_FILES})
-
 	set(RKT_PROJECT_SRCS ${GUI_TYPE} ${RKT_PROJECT_SRCS} ${CMAKE_CURRENT_SOURCE_DIR}/data/macosx/appnib.xib)
 
 	find_library(COCOA_FRAMEWORK Cocoa)
@@ -250,10 +244,6 @@ if (APPLE)
 						  COMMENT "Compiling appnib.xib")
 endif ()
 
-# move the bass dll close to the executable
-if (MSVC)
-	add_custom_command(TARGET ${RKT_EXE_NAME} POST_BUILD COMMAND ${CMAKE_COMMAND} -E copy_if_different "${CMAKE_SOURCE_DIR}/external/bass/win32/bass.dll" $<TARGET_FILE_DIR:${RKT_EXE_NAME}>)
-endif ()
 
 
 ##############################################################################

README.md

@@ -103,20 +103,10 @@ cd rocket
 tundra2 linux-gcc-release
 ```
 
-(optional) Install `libbass.so` from the repo folder:
-
-```
-sudo cp external/bass/linux/libbass.so /usr/local/lib/
-sudo chmod a+rx /usr/local/lib/libbass.so
-sudo ldconfig
-```
-
-
-
 Start rocket:
 
 ```
-LD_LIBRARY_PATH=external/bass/linux/ ./t2-output/linux-gcc-release-default/editor 
+./t2-output/linux-gcc-release-default/editor
 ```
 Start the basic example: