# - Find opus# Find the native opus includes and libraries##  OPUS_INCLUDE_DIRS - where to find opus.h, etc.#  OPUS_LIBRARIES    - List of libraries when using opus.#  OPUS_FOUND        - True if Opus found. if(OPUS_INCLUDE_DIR)  # Already in cache, be silent  set(OPUS_FIND_QUIETLY TRUE)endif() find_package(Ogg QUIET) find_package(PkgConfig QUIET)pkg_check_modules(PC_OPUS QUIET opus) set(OPUS_VERSION ${PC_OPUS_VERSION}) find_path(OPUS_INCLUDE_DIR opus/opus.h  HINTS    ${PC_OPUS_INCLUDEDIR}    ${PC_OPUS_INCLUDE_DIRS}    ${OPUS_ROOT}) # MSVC built opus may be named opus_static.# The provided project files name the library with the lib prefix. find_library(OPUS_LIBRARY  NAMES    opus    opus_static    libopus    libopus_static  HINTS    ${PC_OPUS_LIBDIR}    ${PC_OPUS_LIBRARY_DIRS}    ${OPUS_ROOT}) # Handle the QUIETLY and REQUIRED arguments and set OPUS_FOUND# to TRUE if all listed variables are TRUE.include(FindPackageHandleStandardArgs)find_package_handle_standard_args(Opus  REQUIRED_VARS    OPUS_LIBRARY    OPUS_INCLUDE_DIR    Ogg_FOUND  VERSION_VAR    OPUS_VERSION) if(OPUS_FOUND)  set(OPUS_LIBRARIES ${OPUS_LIBRARY})  set(OPUS_INCLUDE_DIRS ${OPUS_INCLUDE_DIR} ${Ogg_INCLUDE_DIRS})   if(NOT TARGET Opus::opus)    add_library(Opus::opus UNKNOWN IMPORTED)    set_target_properties(Opus::opus PROPERTIES      INTERFACE_INCLUDE_DIRECTORIES "${OPUS_INCLUDE_DIR}"      IMPORTED_LOCATION "${OPUS_LIBRARY}"      INTERFACE_LINK_LIBRARIES Ogg::ogg)  endif()endif() mark_as_advanced(OPUS_INCLUDE_DIR OPUS_LIBRARY)