project(${JPEG_LIBRARY} C)

ocv_warnings_disable(CMAKE_C_FLAGS -Wunused-parameter -Wsign-compare -Wshorten-64-to-32 -Wimplicit-fallthrough)

set(VERSION_MAJOR 2)
set(VERSION_MINOR 1)
set(VERSION_REVISION 3)
set(VERSION ${VERSION_MAJOR}.${VERSION_MINOR}.${VERSION_REVISION})
set(LIBJPEG_TURBO_VERSION_NUMBER 2001003)

string(TIMESTAMP BUILD "opencv-${OPENCV_VERSION}-libjpeg-turbo")
if(CMAKE_BUILD_TYPE STREQUAL "Debug")
  set(BUILD "${BUILD}-debug")
endif()

message(STATUS "libjpeg-turbo: VERSION = ${VERSION}, BUILD = ${BUILD}")

math(EXPR BITS "${CMAKE_SIZEOF_VOID_P} * 8")
string(TOLOWER ${CMAKE_SYSTEM_PROCESSOR} CMAKE_SYSTEM_PROCESSOR_LC)

if(CMAKE_SYSTEM_PROCESSOR_LC MATCHES "x86_64" OR
  CMAKE_SYSTEM_PROCESSOR_LC MATCHES "amd64" OR
  CMAKE_SYSTEM_PROCESSOR_LC MATCHES "i[0-9]86" OR
  CMAKE_SYSTEM_PROCESSOR_LC MATCHES "x86" OR
  CMAKE_SYSTEM_PROCESSOR_LC MATCHES "ia32")
  if(BITS EQUAL 64 OR CMAKE_C_COMPILER_ABI MATCHES "ELF X32")
    set(CPU_TYPE x86_64)
  else()
    set(CPU_TYPE i386)
  endif()
  if(NOT CMAKE_SYSTEM_PROCESSOR STREQUAL ${CPU_TYPE})
    set(CMAKE_SYSTEM_PROCESSOR ${CPU_TYPE})
  endif()
elseif(CMAKE_SYSTEM_PROCESSOR_LC STREQUAL "aarch64" OR
  CMAKE_SYSTEM_PROCESSOR_LC MATCHES "^arm")
  if(BITS EQUAL 64)
    set(CPU_TYPE arm64)
  else()
    set(CPU_TYPE arm)
  endif()
elseif(CMAKE_SYSTEM_PROCESSOR_LC MATCHES "^ppc" OR
  CMAKE_SYSTEM_PROCESSOR_LC MATCHES "^powerpc")
  set(CPU_TYPE powerpc)
else()
  set(CPU_TYPE ${CMAKE_SYSTEM_PROCESSOR_LC})
endif()
if(CMAKE_OSX_ARCHITECTURES MATCHES "x86_64" OR
  CMAKE_OSX_ARCHITECTURES MATCHES "arm64" OR
  CMAKE_OSX_ARCHITECTURES MATCHES "i386")
  set(CPU_TYPE ${CMAKE_OSX_ARCHITECTURES})
endif()
if(CMAKE_OSX_ARCHITECTURES MATCHES "ppc")
  set(CPU_TYPE powerpc)
endif()
if(MSVC_IDE AND CMAKE_GENERATOR_PLATFORM MATCHES "arm64")
  set(CPU_TYPE arm64)
endif()

message(STATUS "${BITS}-bit build (${CPU_TYPE})")

OCV_OPTION(ENABLE_LIBJPEG_TURBO_SIMD "Include SIMD extensions for libjpeg-turbo, if available for this platform" (NOT CV_DISABLE_OPTIMIZATION)
  VISIBLE_IF BUILD_JPEG)
option(WITH_ARITH_ENC "Include arithmetic encoding support when emulating the libjpeg v6b API/ABI" TRUE)
option(WITH_ARITH_DEC "Include arithmetic decoding support when emulating the libjpeg v6b API/ABI" TRUE)
set(WITH_SIMD 1)
set(HAVE_LIBJPEG_TURBO_SIMD 0 PARENT_SCOPE)

include(CheckCSourceCompiles)
include(CheckIncludeFiles)
include(CheckTypeSize)

check_type_size("size_t" SIZEOF_SIZE_T)
check_type_size("unsigned long" SIZEOF_UNSIGNED_LONG)

if(SIZEOF_SIZE_T EQUAL SIZEOF_UNSIGNED_LONG)
  check_c_source_compiles("int main(int argc, char **argv) { unsigned long a = argc;  return __builtin_ctzl(a); }"
    HAVE_BUILTIN_CTZL)
endif()
if(MSVC)
  check_include_files("intrin.h" HAVE_INTRIN_H)
endif()

if(UNIX)
  # Check for headers
  check_include_files(locale.h HAVE_LOCALE_H)
  check_include_files(stddef.h HAVE_STDDEF_H)
  check_include_files(stdlib.h HAVE_STDLIB_H)
  check_include_files(sys/types.h NEED_SYS_TYPES_H)

  # Other predefines
  # undef NEED_BSD_STRINGS
  ocv_update(HAVE_UNSIGNED_CHAR 1)
  ocv_update(HAVE_UNSIGNED_SHORT 1)
  # undef INCOMPLETE_TYPES_BROKEN
  ocv_update(RIGHT_SHIFT_IS_UNSIGNED 0)
endif()


set(BITS_IN_JSAMPLE 8)

if(WITH_ARITH_ENC)
  set(C_ARITH_CODING_SUPPORTED 1)
endif()

if(WITH_ARITH_DEC)
  set(D_ARITH_CODING_SUPPORTED 1)
endif()

set(JPEG_LIB_VERSION 62)

# OpenCV
set(JPEG_LIB_VERSION "${VERSION}-${JPEG_LIB_VERSION}" PARENT_SCOPE)

set(THREAD_LOCAL "")  # WITH_TURBOJPEG is not used

if(MSVC)
  add_definitions(-W3 -wd4996 -wd4018)
endif()

if(WIN32)
  configure_file(jconfig.h.win.in jconfig.h)
else()
  configure_file(jconfig.h.in jconfig.h)
endif()
configure_file(jconfigint.h.in jconfigint.h)

include_directories(${CMAKE_CURRENT_BINARY_DIR} ${CMAKE_CURRENT_SOURCE_DIR}/src)

set(JPEG_SOURCES jcapimin.c jcapistd.c jccoefct.c jccolor.c jcdctmgr.c jchuff.c
        jcicc.c jcinit.c jcmainct.c jcmarker.c jcmaster.c jcomapi.c jcparam.c
        jcphuff.c jcprepct.c jcsample.c jctrans.c jdapimin.c jdapistd.c jdatadst.c
        jdatasrc.c jdcoefct.c jdcolor.c jddctmgr.c jdhuff.c jdicc.c jdinput.c
        jdmainct.c jdmarker.c jdmaster.c jdmerge.c jdphuff.c jdpostct.c jdsample.c
        jdtrans.c jerror.c jfdctflt.c jfdctfst.c jfdctint.c jidctflt.c jidctfst.c
        jidctint.c jidctred.c jquant1.c jquant2.c jutils.c jmemmgr.c jmemnobs.c)

if(WITH_ARITH_ENC OR WITH_ARITH_DEC)
  set(JPEG_SOURCES ${JPEG_SOURCES} jaricom.c)
endif()

if(WITH_ARITH_ENC)
  set(JPEG_SOURCES ${JPEG_SOURCES} jcarith.c)
endif()

if(WITH_ARITH_DEC)
  set(JPEG_SOURCES ${JPEG_SOURCES} jdarith.c)
endif()

if(CMAKE_COMPILER_IS_GNUCC OR CMAKE_C_COMPILER_ID STREQUAL "Clang")
  # Use the maximum optimization level for release builds
  foreach(var CMAKE_C_FLAGS_RELEASE CMAKE_C_FLAGS_RELWITHDEBINFO)
    if(${var} MATCHES "-O2")
      string(REGEX REPLACE "-O2" "-O3" ${var} "${${var}}")
    endif()
  endforeach()
endif()

if(CMAKE_SYSTEM_NAME STREQUAL "SunOS")
  if(CMAKE_C_COMPILER_ID MATCHES "SunPro")
    # Use the maximum optimization level for release builds
    foreach(var CMAKE_C_FLAGS_RELEASE CMAKE_C_FLAGS_RELWITHDEBINFO)
      if(${var} MATCHES "-xO3")
        string(REGEX REPLACE "-xO3" "-xO5" ${var} "${${var}}")
      endif()
      if(${var} MATCHES "-xO2")
        string(REGEX REPLACE "-xO2" "-xO5" ${var} "${${var}}")
      endif()
    endforeach()
  endif()
endif()

if(ENABLE_LIBJPEG_TURBO_SIMD)
  add_subdirectory(src/simd)
  if(NEON_INTRINSICS)
    add_definitions(-DNEON_INTRINSICS)
  endif()
else()
  set(WITH_SIMD 0)
endif()

if(WITH_SIMD)
  message(STATUS "SIMD extensions: ${CPU_TYPE} (WITH_SIMD = ${WITH_SIMD})")
  set(HAVE_LIBJPEG_TURBO_SIMD 1 PARENT_SCOPE)
  if(MSVC_IDE OR XCODE)
    set_source_files_properties(${SIMD_OBJS} PROPERTIES GENERATED 1)
  endif()
else()
  add_library(simd OBJECT src/jsimd_none.c)
  if(NOT WIN32 AND (CMAKE_POSITION_INDEPENDENT_CODE OR ENABLE_SHARED))
    set_target_properties(simd PROPERTIES POSITION_INDEPENDENT_CODE 1)
  endif()
endif()

ocv_list_add_prefix(JPEG_SOURCES src/)

set(JPEG_SOURCES ${JPEG_SOURCES} ${SIMD_OBJS})

add_library(${JPEG_LIBRARY} STATIC ${OPENCV_3RDPARTY_EXCLUDE_FROM_ALL} ${JPEG_SOURCES} $<TARGET_OBJECTS:simd> ${SIMD_OBJS})

set_target_properties(${JPEG_LIBRARY}
  PROPERTIES OUTPUT_NAME ${JPEG_LIBRARY}
  DEBUG_POSTFIX "${OPENCV_DEBUG_POSTFIX}"
  COMPILE_PDB_NAME ${JPEG_LIBRARY}
  COMPILE_PDB_NAME_DEBUG "${JPEG_LIBRARY}${OPENCV_DEBUG_POSTFIX}"
  ARCHIVE_OUTPUT_DIRECTORY ${3P_LIBRARY_OUTPUT_PATH}
  )

if(ENABLE_SOLUTION_FOLDERS)
  set_target_properties(${JPEG_LIBRARY} PROPERTIES FOLDER "3rdparty")
endif()

if(NOT BUILD_SHARED_LIBS)
  ocv_install_target(${JPEG_LIBRARY} EXPORT OpenCVModules ARCHIVE DESTINATION ${OPENCV_3P_LIB_INSTALL_PATH} COMPONENT dev OPTIONAL)
endif()

ocv_install_3rdparty_licenses(libjpeg-turbo README.md LICENSE.md README.ijg)