voice-cat/core/CMakeLists.txt

# libvoicecat — the shared C++ core (docs/architecture.md).
# Sources are globbed so adding a stub under src/<subsystem>/ needs no CMake edit.
file(GLOB_RECURSE VOICECAT_SOURCES CONFIGURE_DEPENDS
     "${CMAKE_CURRENT_SOURCE_DIR}/src/*.cpp")

if(VOICECAT_BUILD_SHARED)
    add_library(voicecat SHARED ${VOICECAT_SOURCES})
    if(WIN32 AND MINGW)
        # The C# client only ships voicecat.dll itself — no MinGW runtime DLLs alongside
        # it. x64-mingw-static only statically links vcpkg's OWN library deps (protobuf,
        # sodium, mbedTLS, ...); the GCC/MinGW runtime stays dynamic by default
        # (libgcc_s_seh-1.dll/libwinpthread-1.dll/libstdc++-6.dll — confirmed via `objdump -p`
        # on the existing vccli.exe). These flags are the standard fully-static-MinGW
        # recipe. Verify after building (see clients/windows/README.md):
        #   objdump -p build/windows-client/bin/voicecat.dll | grep "DLL Name"
        # should show only Windows system DLLs.
        target_link_options(voicecat PRIVATE
            -static-libgcc -static-libstdc++ -static -lwinpthread)
    endif()
    if(WIN32)
        # CMake's default SHARED naming on MinGW adds a "lib" prefix (libvoicecat.dll) —
        # drop it so the output is exactly voicecat.dll, matching the C ABI/library name the
        # C# [LibraryImport] surface and docs use everywhere else.
        set_target_properties(voicecat PROPERTIES PREFIX "")
    endif()
else()
    add_library(voicecat STATIC ${VOICECAT_SOURCES})
    # Static consumers must see VC_API as empty (no dllimport).
    target_compile_definitions(voicecat PUBLIC VOICECAT_STATIC)
endif()
add_library(voicecat::voicecat ALIAS voicecat)

target_include_directories(voicecat
    PUBLIC  ${CMAKE_CURRENT_SOURCE_DIR}/include
    PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/src)

target_compile_definitions(voicecat PRIVATE VOICECAT_BUILDING)
target_compile_features(voicecat PUBLIC cxx_std_20)

set_target_properties(voicecat PROPERTIES
    C_VISIBILITY_PRESET hidden
    CXX_VISIBILITY_PRESET hidden
    VISIBILITY_INLINES_HIDDEN ON)

find_package(protobuf CONFIG REQUIRED)
    find_package(unofficial-sodium CONFIG REQUIRED)
    find_package(MbedTLS CONFIG REQUIRED)
    find_package(asio CONFIG REQUIRED)
    find_package(unofficial-sqlite3 CONFIG REQUIRED)
    find_package(spdlog CONFIG REQUIRED)
    find_package(Opus CONFIG REQUIRED)
    # miniaudio is header-only; vcpkg does not install a CMake config for it.
    find_path(MINIAUDIO_INCLUDE_DIR "miniaudio.h" REQUIRED)

    # Generate C++ from voicecat.proto into the build tree.
    protobuf_generate(
        TARGET voicecat
        PROTOS proto/voicecat.proto
        LANGUAGE cpp
        IMPORT_DIRS ${CMAKE_CURRENT_SOURCE_DIR}/proto
        PROTOC_OUT_DIR ${CMAKE_CURRENT_BINARY_DIR}/generated/proto)
    # Generated .pb.h files are included by protocol/envelope.h (consumed by tests and server),
    # so the generated dir and protobuf itself must be PUBLIC.
    target_include_directories(voicecat PUBLIC ${CMAKE_CURRENT_BINARY_DIR}/generated)

    target_link_libraries(voicecat
        PUBLIC  protobuf::libprotobuf
        PRIVATE unofficial-sodium::sodium
                MbedTLS::mbedtls MbedTLS::mbedcrypto MbedTLS::mbedx509
                asio::asio unofficial::sqlite3::sqlite3 spdlog::spdlog
                Opus::opus)

    target_include_directories(voicecat PRIVATE ${MINIAUDIO_INCLUDE_DIR})

    target_compile_definitions(voicecat PUBLIC VOICECAT_HAS_OPUS VOICECAT_HAS_AUDIO)

    # ── RNNoise — vendored noise-suppression DSP (third_party/rnnoise, BSD-3 + CC0). ──────────
    # The real backend behind ApmProcessor (docs/voice.md §10-11). Built as a standalone C
    # static lib with NO run-time CPU dispatch (RTCD off): portable scalar path on x86,
    # auto-NEON on arm64. -DDISABLE_DEBUG_FLOAT selects the int8-quantized weights that match our
    # shrunk model (third_party/README.md). The vcpkg port is !windows !arm, so we vendor it.
    set(RNNOISE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/../third_party/rnnoise)
    add_library(rnnoise STATIC
        ${RNNOISE_DIR}/src/denoise.c
        ${RNNOISE_DIR}/src/rnn.c
        ${RNNOISE_DIR}/src/pitch.c
        ${RNNOISE_DIR}/src/kiss_fft.c
        ${RNNOISE_DIR}/src/celt_lpc.c
        ${RNNOISE_DIR}/src/nnet.c
        ${RNNOISE_DIR}/src/nnet_default.c
        ${RNNOISE_DIR}/src/parse_lpcnet_weights.c
        ${RNNOISE_DIR}/src/rnnoise_data.c
        ${RNNOISE_DIR}/src/rnnoise_tables.c)
    target_include_directories(rnnoise
        PUBLIC  ${RNNOISE_DIR}/include
        PRIVATE ${RNNOISE_DIR}/src)
    target_compile_definitions(rnnoise PRIVATE DISABLE_DEBUG_FLOAT)
    set_target_properties(rnnoise PROPERTIES
        POSITION_INDEPENDENT_CODE ON   # libvoicecat may be built SHARED (windows-client/apple)
        C_VISIBILITY_PRESET hidden)
    if(CMAKE_SYSTEM_NAME STREQUAL "iOS")
        # rnnoise is plain C; keep it compiling as C even though audio_engine.cpp is OBJCXX.
        set_source_files_properties(${RNNOISE_DIR}/src/rnnoise_data.c PROPERTIES LANGUAGE C)
    endif()

    target_link_libraries(voicecat PRIVATE rnnoise)
    target_compile_definitions(voicecat PRIVATE VOICECAT_HAS_NS)

    # On iOS, miniaudio's AVFoundation backend includes Objective-C headers (AVFoundation.h →
    # Foundation.h). Compiling those as plain C++ fails; setting LANGUAGE OBJCXX for
    # audio_engine.cpp (the only file that includes miniaudio.h directly) fixes this.
    if(CMAKE_SYSTEM_NAME STREQUAL "iOS")
        set_source_files_properties(
            ${CMAKE_CURRENT_SOURCE_DIR}/src/audio/audio_engine.cpp
            PROPERTIES LANGUAGE OBJCXX
        )
    endif()

    if(WIN32)
        # AcceptEx / GetAcceptExSockaddrs live in mswsock; ws2_32 covers the base Winsock API.
        target_link_libraries(voicecat PRIVATE ws2_32 mswsock)
        # Real desktop-audio loopback capture for SCREEN_AUDIO (miniaudio's ma_device_type_loopback
        # is WASAPI-only). Other platforms keep vc_test_inject_capture as the only way to feed
        # SCREEN_AUDIO until a per-platform loopback path is built (macOS: ScreenCaptureKit, per
        # docs/voice.md §9 — not in scope yet).
        target_compile_definitions(voicecat PUBLIC VOICECAT_HAS_LOOPBACK)
    endif()

    # Signal to C++ code that the real networking/crypto stack is available.
    target_compile_definitions(voicecat PUBLIC VOICECAT_HAS_NET)