CMakeLists.txt

cmake_minimum_required (VERSION 3.2)
project (libADLMIDI VERSION 1.5.1 LANGUAGES C CXX)

include(GNUInstallDirs)
include(CheckCCompilerFlag)

# Prefer C90 standard
set(CMAKE_C_STANDARD 90)
# Prefer C++98 standard
set(CMAKE_CXX_STANDARD 98)

if(NOT CMAKE_RUNTIME_OUTPUT_DIRECTORY)
    set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR})
endif()
if(NOT CMAKE_LIBRARY_OUTPUT_DIRECTORY)
    set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR})
endif()
if(NOT CMAKE_ARCHIVE_OUTPUT_DIRECTORY)
    set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR})
endif()

list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_LIST_DIR}/cmake")

if(DJGPP OR MSDOS)
    set(ADLMIDI_DOS 1)
    add_definitions(-DADLMIDI_HW_OPL)
endif()

#===========================================================================================
# Strip garbage
if(APPLE)
    set(LINK_FLAGS_RELEASE  "${LINK_FLAGS_RELEASE} -dead_strip")
elseif(NOT MSVC AND NOT MSDOS AND NOT OPENBSD_LOCALBASE)
    string(REGEX REPLACE "-O3" ""
            CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE}")
    string(REGEX REPLACE "-O3" ""
            CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE}")
    set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} -O2 -fdata-sections -ffunction-sections")
    set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -O2 -fdata-sections -ffunction-sections")
    if(ANDROID)
        set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} -funwind-tables")
        set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -funwind-tables")
    endif()
    if(NOT "${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
        set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} -s -Wl,--gc-sections -Wl,-s")
        set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -s -Wl,--gc-sections -Wl,-s")
        set(LINK_FLAGS_RELEASE  "${LINK_FLAGS_RELEASE} -Wl,--gc-sections -Wl,-s")
    endif()
endif()

if(NOT MSVC AND NOT MSDOS)
# Global optimization flags
    set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} -fno-omit-frame-pointer")
    set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -fno-omit-frame-pointer")
# Turn on all warnings
    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wextra")
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra")
# Deny undefined symbols
    if(NOT APPLE)
        set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,--no-undefined" )
        set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -Wl,--no-undefined" )
        set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} -Wl,--no-undefined" )
    endif()
# Supress the std::vector::insert() GCC change warning
    if(VITA)
        set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DVITA -DVITA=1 -fcompare-debug-second")
        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DVITA -DVITA=1 -fcompare-debug-second")
    endif()
endif()

if(NOT CMAKE_BUILD_TYPE)
    set(CMAKE_BUILD_TYPE "Release")
endif()

# Disable bogus MSVC warnings
if(MSVC)
    add_definitions(-D_CRT_SECURE_NO_WARNINGS)
endif()

if(OPENBSD_LOCALBASE)
    message("OpenBSD Detected!")
    include_directories(${OPENBSD_LOCALBASE}/include)
endif()

if(NOT WIN32 AND CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_GNUCXX)
    check_c_compiler_flag("-no-pie" HAS_NO_PIE)
endif()

function(set_nopie _target)
    if(NOT WIN32 AND HAS_NO_PIE AND CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_GNUCXX)
        set_property(TARGET ${_target} APPEND_STRING PROPERTY LINK_FLAGS " -no-pie")
    endif()
endfunction()

function(set_legacy_standard destTarget)
    if(CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_GNUCXX)
        # Turn on warnings and legacy C/C++ standards to support more compilers
        target_compile_options(${destTarget} PRIVATE
            $<$<COMPILE_LANGUAGE:C>:-Wall -pedantic -std=c90 -Wno-long-long>
            $<$<COMPILE_LANGUAGE:CXX>:-Wall -pedantic -std=gnu++98>
        )
    endif()
endfunction()

function(set_visibility_hidden destTarget)
    if(CMAKE_C_COMPILER_ID MATCHES "^(GNU|Clang)$" AND NOT DJGPP)
        if(CMAKE_VERSION VERSION_GREATER 3.2)
            target_compile_options(${destTarget} PRIVATE
              $<$<COMPILE_LANGUAGE:CXX>:-fvisibility-inlines-hidden> -fvisibility=hidden)
        else()
            target_compile_options(${destTarget} PRIVATE -fvisibility=hidden)
        endif()
        target_compile_definitions(${destTarget} PRIVATE LIBADLMIDI_VISIBILITY=)
    endif()
endfunction()
#===========================================================================================

if(VITA OR 3DS)
    set(DEFAULT_HEAVY_EMULATORS OFF)
else()
    set(DEFAULT_HEAVY_EMULATORS ON)
endif()

if(NOT EMSCRIPTEN
   AND NOT VITA
   AND NOT 3DS
   AND NOT ADLMIDI_DOS)
    option(libADLMIDI_STATIC   "Build static library of libADLMIDI" ON)
    option(libADLMIDI_SHARED   "Build shared library of libADLMIDI" OFF)
else()
    set(libADLMIDI_STATIC ON)
    set(libADLMIDI_SHARED OFF)
endif()

option(WITH_MIDI_SEQUENCER  "Build with embedded MIDI sequencer. Disable this if you want use library in real-time MIDI drivers or plugins." ON)
option(WITH_EMBEDDED_BANKS  "Use embedded banks" ON)
option(WITH_HQ_RESAMPLER    "Build with support for high quality resampling" OFF)
option(WITH_MUS_SUPPORT     "Build with support for DMX MUS files" ON)
option(WITH_XMI_SUPPORT     "Build with support for AIL XMI files" ON)
option(USE_DOSBOX_EMULATOR  "Use DosBox 0.74 OPL3 emulator (semi-accurate, suggested for slow or mobile platforms)" ON)
option(USE_NUKED_EMULATOR   "Use Nuked OPL3 emulator (most accurate, powerful)" ${DEFAULT_HEAVY_EMULATORS})
option(USE_OPAL_EMULATOR    "Use Opal emulator (inaccurate)" ${DEFAULT_HEAVY_EMULATORS})
option(USE_JAVA_EMULATOR    "Use JavaOPL emulator" ${DEFAULT_HEAVY_EMULATORS})

option(WITH_GENADLDATA      "Build and run full rebuild of embedded banks cache" OFF)
option(WITH_GENADLDATA_COMMENTS "Enable comments in a generated embedded instruments cache file" OFF)

option(WITH_MIDIPLAY        "Build also demo MIDI player" OFF)
option(MIDIPLAY_WAVE_ONLY   "Build Demo MIDI player without support of real time playing. It will output into WAV only." OFF)
option(WITH_ADLMIDI2        "Build also classic ADLMIDI player [EXPERIMENTAL]" OFF)
option(WITH_VLC_PLUGIN      "Build also a plugin for VLC Media Player" OFF)
option(VLC_PLUGIN_NOINSTALL "Don't install VLC plugin into VLC directory" OFF)
option(WITH_OLD_UTILS       "Build also old utilities" OFF)
option(WITH_MUS2MID         "Build a MUS to MIDI converter" OFF)
option(WITH_XMI2MID         "Build a XMI to MIDI converter" OFF)
option(EXAMPLE_SDL2_AUDIO   "Build also a simple SDL2 demo MIDI player" OFF)

if(WIN32)
    option(WITH_WINMMDRV    "Build a WinMM MIDI driver" OFF)
endif()

if(NOT WIN32
   AND NOT VITA
   AND NOT 3DS
   AND NOT EMSCRIPTEN
   AND NOT ADLMIDI_DOS)
    option(ENABLE_FPIC "Build static libraries as position independent code" ON)
else()
    set(ENABLE_FPIC OFF)
endif()

function(handle_options targetLib)
    if(WITH_MIDI_SEQUENCER)
        target_sources(${targetLib} PRIVATE ${libADLMIDI_SOURCE_DIR}/src/adlmidi_sequencer.cpp)
        target_compile_definitions(${targetLib} PUBLIC ENABLE_END_SILENCE_SKIPPING)
    endif()

    if(NOT WITH_MUS_SUPPORT OR NOT WITH_MIDI_SEQUENCER)
        target_compile_definitions(${targetLib} PUBLIC BWMIDI_DISABLE_MUS_SUPPORT)
    endif()

    if(NOT WITH_XMI_SUPPORT OR NOT WITH_MIDI_SEQUENCER)
        target_compile_definitions(${targetLib} PUBLIC BWMIDI_DISABLE_XMI_SUPPORT)
    endif()

    if(NOT ADLMIDI_DOS)
        if(USE_DOSBOX_EMULATOR)
            set(HAS_EMULATOR TRUE)
            target_sources(${targetLib} PRIVATE
                ${libADLMIDI_SOURCE_DIR}/src/chips/dosbox_opl3.cpp
                ${libADLMIDI_SOURCE_DIR}/src/chips/dosbox/dbopl.cpp
            )
        else()
            target_compile_definitions(${targetLib} PUBLIC ADLMIDI_DISABLE_DOSBOX_EMULATOR)
        endif()

        if(USE_NUKED_EMULATOR)
            set(HAS_EMULATOR TRUE)
            target_sources(${targetLib} PRIVATE
                ${libADLMIDI_SOURCE_DIR}/src/chips/nuked_opl3.cpp       # v 1.8
                ${libADLMIDI_SOURCE_DIR}/src/chips/nuked/nukedopl3.c
                ${libADLMIDI_SOURCE_DIR}/src/chips/nuked_opl3_v174.cpp  # v 1.7.4
                ${libADLMIDI_SOURCE_DIR}/src/chips/nuked/nukedopl3_174.c
            )
        else()
            target_compile_definitions(${targetLib} PUBLIC ADLMIDI_DISABLE_NUKED_EMULATOR)
        endif()

        if(USE_OPAL_EMULATOR)
            set(HAS_EMULATOR TRUE)
            target_sources(${targetLib} PRIVATE
                ${libADLMIDI_SOURCE_DIR}/src/chips/opal_opl3.cpp
            )
        else()
            target_compile_definitions(${targetLib} PUBLIC ADLMIDI_DISABLE_OPAL_EMULATOR)
        endif()

        if(USE_JAVA_EMULATOR)
            set(HAS_EMULATOR TRUE)
            target_sources(${targetLib} PRIVATE
                ${libADLMIDI_SOURCE_DIR}/src/chips/java_opl3.cpp
            )
        else()
            target_compile_definitions(${targetLib} PUBLIC ADLMIDI_DISABLE_JAVA_EMULATOR)
        endif()

        if(NOT HAS_EMULATOR)
            message(FATAL_ERROR "No emulators enabled! You must enable at least one emulator!")
        endif()
    endif()

    if(WITH_EMBEDDED_BANKS)
        target_sources(${targetLib} PRIVATE
            ${libADLMIDI_SOURCE_DIR}/src/inst_db.cpp
        )
    else()
        target_compile_definitions(${targetLib} PUBLIC DISABLE_EMBEDDED_BANKS)
    endif()

    if(NOT WITH_MIDI_SEQUENCER)
        target_compile_definitions(${targetLib} PUBLIC ADLMIDI_DISABLE_MIDI_SEQUENCER)
    endif()

    if(WITH_EMBEDDED_BANKS AND WITH_GENADLDATA AND NOT ADLMIDI_DOS)
        add_dependencies(${targetLib} gen-adldata-run)
    endif()

    if(WITH_HQ_RESAMPLER AND NOT ADLMIDI_DOS)
        find_library(ZITA_RESAMPLER_LIBRARY "zita-resampler")
        if(NOT ZITA_RESAMPLER_LIBRARY)
            message(FATAL_ERROR "zita-resampler library not found")
        endif()
        target_compile_definitions(${targetLib} PRIVATE ADLMIDI_ENABLE_HQ_RESAMPLER)
        target_link_libraries(${targetLib} PUBLIC ${ZITA_RESAMPLER_LIBRARY})
    endif()
endfunction()

set(libADLMIDI_SOURCES
    ${libADLMIDI_SOURCE_DIR}/src/adlmidi.cpp
    ${libADLMIDI_SOURCE_DIR}/src/adlmidi_load.cpp
    ${libADLMIDI_SOURCE_DIR}/src/adlmidi_midiplay.cpp
    ${libADLMIDI_SOURCE_DIR}/src/adlmidi_opl3.cpp
    ${libADLMIDI_SOURCE_DIR}/src/adlmidi_private.cpp
    ${libADLMIDI_SOURCE_DIR}/src/wopl/wopl_file.c
)

# === Static library ====
if(libADLMIDI_STATIC OR WITH_VLC_PLUGIN)
    add_library(ADLMIDI_static STATIC ${libADLMIDI_SOURCES})
    if(WIN32 AND libADLMIDI_SHARED)
        set_target_properties(ADLMIDI_static PROPERTIES OUTPUT_NAME ADLMIDI-static)
    else()
        set_target_properties(ADLMIDI_static PROPERTIES OUTPUT_NAME ADLMIDI)
    endif()
    target_include_directories(ADLMIDI_static PUBLIC ${libADLMIDI_SOURCE_DIR}/include)
    set_legacy_standard(ADLMIDI_static)
    set_visibility_hidden(ADLMIDI_static)
    handle_options(ADLMIDI_static)

    # -fPIC thing
    if(ENABLE_FPIC)
        set_target_properties(ADLMIDI_static PROPERTIES COMPILE_FLAGS "-fPIC")
    endif()

    if(NOT libADLMIDI_STATIC)
        set_target_properties(ADLMIDI_static PROPERTIES EXCLUDE_FROM_ALL TRUE)
    endif()
endif()

# === Shared library ====
if(libADLMIDI_SHARED)
    add_library(ADLMIDI_shared SHARED ${libADLMIDI_SOURCES})
    set_target_properties(ADLMIDI_shared PROPERTIES OUTPUT_NAME ADLMIDI)
    set_target_properties(ADLMIDI_shared PROPERTIES
        VERSION ${libADLMIDI_VERSION}
        SOVERSION ${libADLMIDI_VERSION_MAJOR}
    )
    target_include_directories(ADLMIDI_shared PUBLIC ${libADLMIDI_SOURCE_DIR}/include)
    set_legacy_standard(ADLMIDI_shared)
    set_visibility_hidden(ADLMIDI_shared)
    handle_options(ADLMIDI_shared)
    if(WIN32)
        target_compile_definitions(ADLMIDI_shared PRIVATE ADLMIDI_BUILD_DLL)
        if(CMAKE_COMPILER_IS_GNUCXX)
            set_property(TARGET ADLMIDI_shared APPEND_STRING PROPERTY LINK_FLAGS " -static-libgcc -static-libstdc++")
            set_property(TARGET ADLMIDI_shared APPEND_STRING PROPERTY LINK_FLAGS " -Wl,-Bstatic,--whole-archive -lpthread -Wl,-Bdynamic,--no-whole-archive")
        endif()
    endif()
    if(OPENBSD_LOCALBASE)
        set_property(TARGET ADLMIDI_shared APPEND_STRING PROPERTY LINK_FLAGS " -lc")
    endif()

    set_target_properties(ADLMIDI_shared PROPERTIES SOVERSION "1")
endif()

if(NOT libADLMIDI_STATIC AND NOT libADLMIDI_SHARED)
    message(FATAL_ERROR "Both static and shared libADLMIDI builds are disabled!
You must enable at least one of them!")
endif()

if(libADLMIDI_SHARED)
    add_library(ADLMIDI ALIAS ADLMIDI_shared)
else()
    add_library(ADLMIDI ALIAS ADLMIDI_static)
endif()

function(libADLMIDI_find_SDL2)
    if(NOT TARGET ADLMIDI_SDL2)
        find_package(SDL2 REQUIRED)
        add_library(ADLMIDI_SDL2 INTERFACE)
        if(TARGET SDL2::SDL2)
            target_link_libraries(ADLMIDI_SDL2 INTERFACE SDL2::SDL2)
        else()
            string(STRIP ${SDL2_LIBRARIES} SDL2_LIBRARIES)
            target_include_directories(ADLMIDI_SDL2 INTERFACE ${SDL2_INCLUDE_DIRS})
            target_link_libraries(ADLMIDI_SDL2 INTERFACE ${SDL2_LIBRARIES})
        endif()
    endif()
endfunction()

if(WITH_OLD_UTILS)
    # Old utility to dump AdLib bank files
    add_subdirectory(utils/dumpbank)
    # Old utility to dump AIL bank files
    add_subdirectory(utils/dumpmiles)
endif()

if(WITH_EMBEDDED_BANKS AND WITH_GENADLDATA AND NOT ADLMIDI_DOS)
    add_subdirectory(utils/gen_adldata)
endif()

if(WITH_MIDIPLAY)
    add_subdirectory(utils/midiplay)
endif()

if(WITH_ADLMIDI2)
    add_subdirectory(utils/adlmidi-2)
endif()

if(WITH_MUS2MID)
    add_subdirectory(utils/mus2mid)
endif()

if(WITH_XMI2MID)
    add_subdirectory(utils/xmi2mid)
endif()

if(EXAMPLE_SDL2_AUDIO AND NOT ADLMIDI_DOS)
    add_subdirectory(examples/sdl2_audio)
endif()

if(WITH_VLC_PLUGIN AND NOT ADLMIDI_DOS)
    add_subdirectory(utils/vlc_codec)
endif()

if(WIN32 AND WITH_WINMMDRV)
    add_subdirectory(utils/winmm_drv)
endif()

set(libADLMIDI_INSTALLS )
foreach(lib ADLMIDI_static ADLMIDI_shared)
    if(TARGET ${lib})
        list(APPEND libADLMIDI_INSTALLS ${lib})
    endif()
endforeach()

install(TARGETS ${libADLMIDI_INSTALLS}
        RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}"
        LIBRARY DESTINATION "${CMAKE_INSTALL_LIBDIR}"
        ARCHIVE DESTINATION "${CMAKE_INSTALL_LIBDIR}"
        INCLUDES DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}")

install(FILES
        include/adlmidi.h
        DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}")

file(GLOB DOCTXT_FILES
    "${libADLMIDI_SOURCE_DIR}/LICENSE*.txt"
    README.md AUTHORS
)
install(FILES ${DOCTXT_FILES}
        DESTINATION "${CMAKE_INSTALL_DATAROOTDIR}/doc/libADLMIDI")

if(NOT ANDROID)
    configure_file(libADLMIDI.pc.in libADLMIDI.pc @ONLY)
    install(FILES "${CMAKE_CURRENT_BINARY_DIR}/libADLMIDI.pc"
            DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig")
endif()

# === Unit tests ====
option(WITH_UNIT_TESTS "Enable unit testing" OFF)
if(WITH_UNIT_TESTS)
    enable_testing()
    add_subdirectory(test)
endif()


# === Version check ====
set(VERSION_CHECK_SOURCE "
    #include \"adlmidi.h\"
    #if !(ADLMIDI_VERSION_MAJOR == ${PROJECT_VERSION_MAJOR} && ADLMIDI_VERSION_MINOR == ${PROJECT_VERSION_MINOR} && ADLMIDI_VERSION_PATCHLEVEL == ${PROJECT_VERSION_PATCH})
    #error Project and source code version do not match!
    #endif")
file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/version_check.c" "${VERSION_CHECK_SOURCE}")
add_library(ADLMIDI_version_check OBJECT "${CMAKE_CURRENT_BINARY_DIR}/version_check.c")
target_include_directories(ADLMIDI_version_check PRIVATE "include")


# === Summary ====
message("==== libADLMIDI options ====")
message("libADLMIDI_STATIC        = ${libADLMIDI_STATIC}")
message("libADLMIDI_SHARED        = ${libADLMIDI_SHARED}")
message("WITH_UNIT_TESTS          = ${WITH_UNIT_TESTS}")

message("WITH_MIDI_SEQUENCER      = ${WITH_MIDI_SEQUENCER}")
message("WITH_EMBEDDED_BANKS      = ${WITH_EMBEDDED_BANKS}")
message("WITH_HQ_RESAMPLER        = ${WITH_HQ_RESAMPLER}")
message("WITH_MUS_SUPPORT         = ${WITH_MUS_SUPPORT}")
message("WITH_XMI_SUPPORT         = ${WITH_XMI_SUPPORT}")
message("USE_DOSBOX_EMULATOR      = ${USE_DOSBOX_EMULATOR}")
message("USE_NUKED_EMULATOR       = ${USE_NUKED_EMULATOR}")
message("USE_OPAL_EMULATOR        = ${USE_OPAL_EMULATOR}")
message("USE_JAVA_EMULATOR        = ${USE_JAVA_EMULATOR}")

message("===== Utils and extras =====")
message("WITH_GENADLDATA          = ${WITH_GENADLDATA}")
message("WITH_GENADLDATA_COMMENTS = ${WITH_GENADLDATA_COMMENTS}")

message("WITH_MIDIPLAY            = ${WITH_MIDIPLAY}")
message("MIDIPLAY_WAVE_ONLY       = ${MIDIPLAY_WAVE_ONLY}")
message("WITH_ADLMIDI2            = ${WITH_ADLMIDI2}")
message("WITH_VLC_PLUGIN          = ${WITH_VLC_PLUGIN}")
message("WITH_OLD_UTILS           = ${WITH_OLD_UTILS}")
message("WITH_MUS2MID             = ${WITH_MUS2MID}")
message("WITH_XMI2MID             = ${WITH_XMI2MID}")
message("EXAMPLE_SDL2_AUDIO       = ${EXAMPLE_SDL2_AUDIO}")
if(WIN32)
    message("WITH_WINMMDRV            = ${WITH_WINMMDRV}")
endif()