Files
dusk/cmake/targets/dolphin.cmake
T
YourWishesandClaude Sonnet 5 fd5bcfae90 Switch Linux/Dolphin MP3 decode from minimp3 to libmad
minimp3's sliding-window frame confirmation could spuriously discard real
frames near the tail of a not-yet-full window, losing ~5.5% of a real
VBR file's content even at a tuned 256KB window (~0.3% residual) -
audible as the whole track finishing early with stutters at each drop.

libmad's mad_stream/mad_frame/mad_synth API reports "need more data"
(MAD_ERROR_BUFLEN) and "genuinely bad data" separately rather than
overloading one return value, which was the actual ambiguity minimp3
couldn't resolve. Verified against the same real file with a 32KB window
(vs minimp3's 256KB): frame count and duration match the Xing header
exactly. Confirmed building for Linux, GameCube, and Wii (the latter two
via the project's real devkitPPC/libogc Docker toolchain) - libmad ships
inside libogc itself on Dolphin, no separate fetch needed there.

libmad is GPL-licensed, unlike the rest of this MIT project - a
deliberate tradeoff, noted at each site that pulls it in.

Co-Authored-By: Claude Sonnet 5 <[email protected]>
2026-09-02 09:47:15 -05:00

82 lines
2.9 KiB
CMake

# Build type: DOL (SD/USB via libfat) or ISO (DVD disc via libogc DVD driver)
set(DUSK_DOLPHIN_BUILD_TYPE "DOL" CACHE STRING "Dolphin asset source: DOL (SD/USB) or ISO (DVD disc)")
set_property(CACHE DUSK_DOLPHIN_BUILD_TYPE PROPERTY STRINGS "DOL" "ISO")
# Numeric tokens so #if DUSK_DOLPHIN_BUILD_TYPE == DOL works in C.
# DUSK_DOLPHIN_BUILD_TYPE is passed without quotes so it expands to the identifier.
target_compile_definitions(${DUSK_LIBRARY_TARGET_NAME} PUBLIC
DUSK_DOLPHIN
DUSK_INPUT_GAMEPAD
# DUSK_DISPLAY_WIDTH=640
# DUSK_DISPLAY_HEIGHT=480
DUSK_DISPLAY_WIDTH=320
DUSK_DISPLAY_HEIGHT=240
DUSK_DISPLAY_OVERSCAN=16
DUSK_THREAD_PTHREAD
DOL=1
ISO=2
DUSK_DOLPHIN_BUILD_TYPE=${DUSK_DOLPHIN_BUILD_TYPE}
# GameCube/Wii PowerPC is always big-endian; declare it at compile time
# like every other target instead of relying on endian.h's runtime probe.
DUSK_PLATFORM_ENDIAN_BIG
)
# Custom compiler flags
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-rtti -fno-exceptions")
# Disable all warnings
target_compile_options(${DUSK_LIBRARY_TARGET_NAME} PRIVATE -w)
# cglm: fetched at source level via Findcglm.cmake (FetchContent, headers only)
find_package(cglm REQUIRED)
# Pre-create ZLIB::ZLIB so any downstream cmake module that resolves it
# (FindZLIB, pkg-config IMPORTED_TARGET Requires processing) gets plain -lz
# rather than an unresolvable IMPORTED target that the PPC linker rejects.
if(NOT TARGET ZLIB::ZLIB)
add_library(ZLIB::ZLIB INTERFACE IMPORTED GLOBAL)
set_target_properties(ZLIB::ZLIB PROPERTIES INTERFACE_LINK_LIBRARIES "z")
endif()
# Mark libzip as found so src/dusk/CMakeLists.txt skips Findlibzip.cmake.
# Findlibzip.cmake calls find_package(ZLIB) which can recreate a broken
# ZLIB::ZLIB IMPORTED target, bypassing the shim above.
set(libzip_FOUND TRUE CACHE BOOL "libzip found (devkitpro portlibs)" FORCE)
# Locate zip.h in the devkitpro sysroot (respects CMAKE_FIND_ROOT_PATH).
find_path(_dusk_zip_inc NAMES zip.h)
if(_dusk_zip_inc)
target_include_directories(${DUSK_LIBRARY_TARGET_NAME} PRIVATE "${_dusk_zip_inc}")
endif()
# Link libraries.
# zip/z/lzma use target_link_options (raw flags) to bypass cmake target
# resolution - pkg-config-generated targets for these carry ZLIB::ZLIB in
# INTERFACE_LINK_LIBRARIES which breaks the PPC link step.
target_link_libraries(${DUSK_LIBRARY_TARGET_NAME} PRIVATE
cglm
m
zip
bz2
zstd
z
lzma
ansnd
mad
)
if(DUSK_DOLPHIN_BUILD_TYPE STREQUAL "ISO")
target_compile_definitions(${DUSK_LIBRARY_TARGET_NAME} PUBLIC DUSK_DOLPHIN_BUILD_ISO)
else()
target_link_libraries(${DUSK_LIBRARY_TARGET_NAME} PRIVATE fat)
endif()
# Postbuild: ELF -> DOL
set(DUSK_BINARY_TARGET_NAME_DOL "${DUSK_BUILD_DIR}/Dusk.dol")
add_custom_command(TARGET ${DUSK_BINARY_TARGET_NAME} POST_BUILD
COMMAND elf2dol
"$<TARGET_FILE:${DUSK_BINARY_TARGET_NAME}>"
"${DUSK_BINARY_TARGET_NAME_DOL}"
COMMENT "Generating ${DUSK_BINARY_TARGET_NAME_DOL} from ${DUSK_BINARY_TARGET_NAME}"
)