project('gst-devtools', 'c',
  version : '1.21.1.1',
  meson_version : '>= 0.62',
  default_options : [ 'warning_level=1',
                      'c_std=gnu99',
                      'buildtype=debugoptimized' ])

gst_version = meson.project_version()
version_arr = gst_version.split('.')
gst_version_major = version_arr[0].to_int()
gst_version_minor = version_arr[1].to_int()
gst_version_micro = version_arr[2].to_int()
gst_version_is_stable = gst_version_minor.is_even()
gst_version_is_dev = gst_version_minor.is_odd() and gst_version_micro < 90
if gst_version_is_stable
  TESTSUITE_VERSION = '@0@.@1@'.format(gst_version_major, gst_version_minor)
else
  TESTSUITE_VERSION = 'master' # FIXME: main?
endif

apiversion = '1.0'
soversion = 0
# maintaining compatibility with the previous libtool versioning
# current = minor * 100 + micro
curversion = gst_version_minor * 100 + gst_version_micro
libversion = '@0@.@1@.0'.format(soversion, curversion)
osxversion = curversion + 1

prefix = get_option('prefix')

glib_req = '>= 2.62.0'

if gst_version_is_stable
  gst_req = '>= @0@.@1@.0'.format(gst_version_major, gst_version_minor)
else
  gst_req = '>= ' + gst_version
endif

cc = meson.get_compiler('c')

if cc.get_id() == 'msvc'
  msvc_args = [
      # Ignore several spurious warnings for things gstreamer does very commonly
      # If a warning is completely useless and spammy, use '/wdXXXX' to suppress it
      # If a warning is harmless but hard to fix, use '/woXXXX' so it's shown once
      # NOTE: Only add warnings here if you are sure they're spurious
      '/wd4018', # implicit signed/unsigned conversion
      '/wd4146', # unary minus on unsigned (beware INT_MIN)
      '/wd4244', # lossy type conversion (e.g. double -> int)
      '/wd4305', # truncating type conversion (e.g. double -> float)
      cc.get_supported_arguments(['/utf-8']), # set the input encoding to utf-8

      # Enable some warnings on MSVC to match GCC/Clang behaviour
      '/w14062', # enumerator 'identifier' in switch of enum 'enumeration' is not handled
      '/w14101', # 'identifier' : unreferenced local variable
      '/w14189', # 'identifier' : local variable is initialized but not referenced
  ]
  add_project_arguments(msvc_args, language: 'c')
  # Disable SAFESEH with MSVC for plugins and libs that use external deps that
  # are built with MinGW
  noseh_link_args = ['/SAFESEH:NO']
else
  noseh_link_args = []
endif

# glib doesn't support unloading, which means that unloading and reloading
# any library that registers static types will fail
if cc.has_link_argument('-Wl,-z,nodelete')
  add_project_link_arguments('-Wl,-z,nodelete', language: 'c')
endif

# Symbol visibility
if cc.has_argument('-fvisibility=hidden')
  add_project_arguments('-fvisibility=hidden', language: 'c')
endif

# Disable strict aliasing
if cc.has_argument('-fno-strict-aliasing')
  add_project_arguments('-fno-strict-aliasing', language: 'c')
endif

gst_dep = dependency('gstreamer-' + apiversion, version : gst_req,
    fallback : ['gstreamer', 'gst_dep'])
gstbase_dep = dependency('gstreamer-base-' + apiversion, version : gst_req,
    fallback : ['gstreamer', 'gst_base_dep'])
gst_pbutils_dep = dependency('gstreamer-pbutils-' + apiversion, version : gst_req,
    fallback : ['gst-plugins-base', 'pbutils_dep'])
gst_video_dep = dependency('gstreamer-video-' + apiversion, version : gst_req,
    fallback : ['gst-plugins-base', 'video_dep'])
gst_controller_dep = dependency('gstreamer-controller-' + apiversion, version : gst_req,
    fallback : ['gstreamer', 'gst_controller_dep'])
gst_check_dep = dependency('gstreamer-check-1.0', version : gst_req,
  required : get_option('validate'),
  fallback : ['gstreamer', 'gst_check_dep'])

gio_dep = dependency('gio-2.0', version: glib_req)
gmodule_dep = dependency('gmodule-no-export-2.0')

gtk_dep = dependency('gtk+-3.0', required: false)
mathlib = cc.find_library('m', required : false)
dl = cc.find_library('dl', required : false)
json_dep = dependency('json-glib-1.0',
    fallback : ['json-glib', 'json_glib_dep'])

gst_c_args = ['-DHAVE_CONFIG_H', '-DGST_USE_UNSTABLE_API']

gir_init_section = [ '--add-init-section=extern void gst_init(gint*,gchar**);' + \
    'g_setenv("GST_REGISTRY_1.0", "/no/way/this/exists.reg", TRUE);' + \
    'g_setenv("GST_PLUGIN_PATH_1_0", "", TRUE);' + \
    'g_setenv("GST_PLUGIN_SYSTEM_PATH_1_0", "", TRUE);' + \
    'gst_init(NULL,NULL);', '--quiet']
gir = find_program('g-ir-scanner', required : get_option('introspection'))
build_gir = gir.found() and (not meson.is_cross_build() or get_option('introspection').enabled())
gnome = import('gnome')

if gst_dep.type_name() == 'internal'
  gst_debug_disabled = not subproject('gstreamer').get_variable('gst_debug')
else
  # We can't check that in the case of subprojects as we won't
  # be able to build against an internal dependency (which is not built yet)
  gst_debug_disabled = cc.has_header_symbol('gst/gstconfig.h', 'GST_DISABLE_GST_DEBUG', dependencies: gst_dep)
endif

if gst_debug_disabled and cc.has_argument('-Wno-unused')
  add_project_arguments('-Wno-unused', language: 'c')
endif

warning_flags = [
  '-Wmissing-declarations',
  '-Wmissing-prototypes',
  '-Wredundant-decls',
  '-Wundef',
  '-Wwrite-strings',
  '-Wformat',
  '-Wformat-security',
  '-Winit-self',
  '-Wmissing-include-dirs',
  '-Waddress',
  '-Wno-multichar',
  '-Wvla',
  '-Wpointer-arith',
]

foreach extra_arg : warning_flags
  if cc.has_argument (extra_arg)
    add_project_arguments([extra_arg], language: 'c')
  endif
endforeach

pkgconfig = import('pkgconfig')
plugins_install_dir = join_paths(get_option('libdir'), 'gstreamer-1.0')
plugins_pkgconfig_install_dir = join_paths(plugins_install_dir, 'pkgconfig')
if get_option('default_library') == 'shared'
  # If we don't build static plugins there is no need to generate pc files
  plugins_pkgconfig_install_dir = disabler()
endif
pkgconfig_subdirs = ['gstreamer-1.0']

gst_plugins_doc_dep = []
plugins = []
i18n = import('i18n')

static_build = get_option('default_library') == 'static'
gst_libraries = []

python_mod = import('python')
python3 = python_mod.find_installation()
if not get_option('validate').disabled()
  subdir('validate')
endif

if not get_option('debug_viewer').disabled()
  subdir('debug-viewer')
endif
subdir('docs')

plugin_names = []
gst_plugins = []
foreach plugin: plugins
  pkgconfig.generate(plugin, install_dir: plugins_pkgconfig_install_dir)
  dep = declare_dependency(link_with: plugin, variables: {'full_path': plugin.full_path()})
  meson.override_dependency(plugin.name(), dep)
  gst_plugins += [dep]
  if plugin.name().startswith('gst')
    plugin_names += [plugin.name().substring(3)]
  else
    plugin_names += [plugin.name()]
  endif
endforeach

summary({
    'Plugins': plugin_names,
}, list_sep: ', ')