libcaption-node/CMakeLists.txt

libcaption-node enables you to embed captions 608 captions into your videos. Most of the work is done with [ffmpeg](https://github.com/xonecas/ffmpeg-node) and [libcaption](https://github.com/szatmary/libcaption).

cmake_minimum_required(VERSION 2.8)
project(libcaption-node)
set(CMAKE_CXX_FLAGS "-Wall -O3")
add_definitions(-D__STDC_CONSTANT_MACROS)
if (WIN32)
  add_definitions(-D_CRT_SECURE_NO_WARNINGS)
endif()

option(debug "Enable debug symbols." OFF)
if (NOT CMAKE_BUILD_TYPE OR NOT debug)
    set(CMAKE_BUILD_TYPE Release)
else()
    set(CMAKE_BUILD_TYPE Debug)
endif()

# Don't need to prefix local includes with "caption/*"
include_directories(${CMAKE_CURRENT_SOURCE_DIR}/libcaption/caption)

option(ENABLE_RE2C "Use RE2C to generate eia608.c" ON)
set(eia608_from_utf8_c ${CMAKE_SOURCE_DIR}/libcaption/src/eia608_from_utf8.c)
set(eia608_from_utf8_c_cached ${CMAKE_SOURCE_DIR}/libcaption/src/eia608_from_utf8.c.cached)
if(ENABLE_RE2C)
  find_program(RE2C re2c)
  set(eia608_from_utf8_re2c ${CMAKE_SOURCE_DIR}/libcaption/src/eia608_from_utf8.re2c)
  if(RE2C)
    message(STATUS "Found re2c: ${RE2C}")

    # Create a temporary file until re2c regenerates it so that CMake doesn't
    # complain about the missing source file
    if(NOT EXISTS ${eia608_from_utf8_c})
      file(WRITE ${eia608_from_utf8_c} "")
    endif()

    add_custom_target(re2c
      COMMAND ${CMAKE_COMMAND} -E remove ${eia608_from_utf8_c}
      COMMAND ${RE2C} -bis --no-generation-date --no-version -o ${eia608_from_utf8_c} ${eia608_from_utf8_re2c}
      COMMAND ${CMAKE_COMMAND} -E copy ${eia608_from_utf8_c} ${eia608_from_utf8_c_cached}
      DEPENDS ${eia608_from_utf8_re2c}
      COMMENT "Generating ${eia608_from_utf8_re2c}")
  else()
    message(SEND_ERROR "Could not find re2c executable")
  endif()
else()
  message(WARNING "Using cached re2c file: ${eia608_from_utf8_c_cached}")
  if(NOT EXISTS ${eia608_from_utf8_c})
    file(WRITE ${eia608_from_utf8_c} "")
  endif()
  configure_file(${eia608_from_utf8_c_cached} ${eia608_from_utf8_c} COPYONLY)
endif()

set(CAPTION_SOURCES
  libcaption/src/utf8.c
  libcaption/src/srt.c
  libcaption/src/scc.c
  libcaption/src/avc.c
  libcaption/src/xds.c
  libcaption/src/cea708.c
  libcaption/src/caption.c
  libcaption/src/eia608.c
  libcaption/src/eia608_charmap.c
  libcaption/src/eia608_from_utf8.c
)

set(CAPTION_HEADERS
  libcaption/caption/avc.h
  libcaption/caption/caption.h
  libcaption/caption/cea708.h
  libcaption/caption/eia608.h
  libcaption/caption/eia608_charmap.h
  libcaption/caption/scc.h
  libcaption/caption/srt.h
  libcaption/caption/utf8.h
  libcaption/caption/xds.h
)

add_library(caption ${CAPTION_SOURCES})

if(ENABLE_RE2C)
  add_dependencies(caption re2c)
endif()

if(CMAKE_VERSION VERSION_EQUAL 2.8.12 OR CMAKE_VERSION VERSION_GREATER 2.8.12)
target_include_directories(caption PUBLIC ${CMAKE_CURRENT_SOURCE_DIR})
endif()

option(BUILD_EXAMPLES "Build examples" ON)
if(BUILD_EXAMPLES)
  add_subdirectory(libcaption/examples)
endif()

# unit-tests
#add_executable(eia608_test unit_tests/eia608_test.c )
#target_link_libraries(eia608_test caption)

#add_executable(test_captions unit_tests/test_sei.c )
#target_link_libraries(test_captions caption)

install (TARGETS caption DESTINATION lib EXPORT caption-targets)
install (FILES ${CAPTION_HEADERS} DESTINATION include/caption)

find_package(Doxygen)
if(DOXYGEN_FOUND)
  configure_file(${CMAKE_CURRENT_SOURCE_DIR}/libcaption/Doxyfile.in ${CMAKE_CURRENT_SOURCE_DIR}/libcaption/Doxyfile @ONLY)
  add_custom_target(doc
  ${DOXYGEN_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/libcaption/Doxyfile
  WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/libcaption
  COMMENT "Generating API documentation with Doxygen" VERBATIM
)
endif(DOXYGEN_FOUND)