cmake_minimum_required(VERSION 2.8.12)

project(libdshowcapture)

set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules/")

option(BUILD_SHARED_LIBS "Build shared library" ON)

find_package(CXX11 REQUIRED)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${CXX11_FLAGS}")

if(${CMAKE_C_COMPILER_ID} MATCHES "Clang" OR ${CMAKE_CXX_COMPILER_ID} MATCHES
                                             "Clang")
  set(CMAKE_COMPILER_IS_CLANG TRUE)
endif()

if(CMAKE_COMPILER_IS_GNUCC
   OR CMAKE_COMPILER_IS_GNUCXX
   OR CMAKE_COMPILER_IS_CLANG)
  set(CMAKE_CXX_FLAGS
      "-Wall -Wextra -Wno-unused-function -Werror-implicit-function-declaration -Wno-missing-field-initializers ${CMAKE_CXX_FLAGS} -fno-strict-aliasing"
  )
  set(CMAKE_C_FLAGS
      "-Wall -Wextra -Wno-unused-function -Werror-implicit-function-declaration -Wno-missing-braces -Wno-missing-field-initializers ${CMAKE_C_FLAGS} -std=gnu99 -fno-strict-aliasing"
  )

  option(USE_LIBC++ "Use libc++ instead of libstdc++" ${APPLE})
  if(USE_LIBC++)
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -stdlib=libc++")
  endif()
elseif(MSVC)
  if(CMAKE_CXX_FLAGS MATCHES "/W[0-4]")
    string(REGEX REPLACE "/W[0-4]" "/W4" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
  else()
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /W4")
  endif()

  # Disable pointless constant condition warnings
  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /wd4127 /wd4201")
endif()

if(WIN32)
  add_definitions(-DUNICODE -D_UNICODE)
  if(BUILD_SHARED_LIBS)
    add_definitions(-DDSHOWCAPTURE_EXPORTS)
  endif()
endif()

if(MSVC)
  set(CMAKE_C_FLAGS_DEBUG "/DDEBUG=1 /D_DEBUG=1 ${CMAKE_C_FLAGS_DEBUG}")
  set(CMAKE_CXX_FLAGS_DEBUG "/DDEBUG=1 /D_DEBUG=1 ${CMAKE_C_FLAGS_DEBUG}")

  if(NOT CMAKE_SIZEOF_VOID_P EQUAL 8)
    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} /SAFESEH:NO")
    set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} /SAFESEH:NO")
    set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} /SAFESEH:NO")
  endif()
else()
  if(MINGW)
    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D_WIN32_WINNT=0x0600 -DWINVER=0x0600")
    set(CMAKE_CXX_FLAGS
        "${CMAKE_CXX_FLAGS} -D_WIN32_WINNT=0x0600 -DWINVER=0x0600")
  endif()
  set(CMAKE_C_FLAGS_DEBUG "-DDEBUG=1 -D_DEBUG=1 ${CMAKE_C_FLAGS_DEBUG}")
  set(CMAKE_CXX_FLAGS_DEBUG "-DDEBUG=1 -D_DEBUG=1 ${CMAKE_CXX_FLAGS_DEBUG}")
endif()

if(MINGW)
  include(CheckSymbolExists)
  check_symbol_exists(MINGW_HAS_SECURE_API "_mingw.h" HAVE_MINGW_HAS_SECURE_API)
  if(NOT HAVE_MINGW_HAS_SECURE_API)
    message(FATAL_ERROR "mingw must be compiled with --enable-secure-api")
  endif()
endif()

set(libdshowcapture_SOURCES
    external/capture-device-support/Library/EGAVResult.cpp
    external/capture-device-support/Library/ElgatoUVCDevice.cpp
    external/capture-device-support/Library/win/EGAVHIDImplementation.cpp
    external/capture-device-support/SampleCode/DriverInterface.cpp
    source/capture-filter.cpp
    source/output-filter.cpp
    source/dshowcapture.cpp
    source/dshowencode.cpp
    source/device.cpp
    source/device-vendor.cpp
    source/encoder.cpp
    source/dshow-base.cpp
    source/dshow-demux.cpp
    source/dshow-enum.cpp
    source/dshow-formats.cpp
    source/dshow-media-type.cpp
    source/dshow-encoded-device.cpp
    source/log.cpp)

set(libdshowcapture_HEADERS
    dshowcapture.hpp
    source/external/IVideoCaptureFilter.h
    source/capture-filter.hpp
    source/output-filter.hpp
    source/device.hpp
    source/encoder.hpp
    source/dshow-base.hpp
    source/dshow-demux.hpp
    source/dshow-device-defs.hpp
    source/dshow-enum.hpp
    source/dshow-formats.hpp
    source/dshow-media-type.hpp
    source/log.hpp)

add_library(libdshowcapture ${libdshowcapture_SOURCES}
                            ${libdshowcapture_HEADERS})

target_include_directories(
  libdshowcapture
  PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/external/capture-device-support/Library)

target_compile_definitions(libdshowcapture PRIVATE _UP_WINDOWS=1)

target_link_libraries(libdshowcapture PRIVATE setupapi strmiids ksuser winmm
                                              wmcodecdspuuid)
