project('gst-plugins-rs',
        'rust',
        'c',
        version: '0.13.0',
        meson_version : '>= 0.52')

if get_option('debug')
  target = 'debug'
else
  target = 'release'
endif

cargo = find_program('cargo', version:'>=1.40')
cargo_wrapper = find_program('cargo_wrapper.py')

system = build_machine.system()
if system == 'windows'
  ext = 'dll'
elif system == 'darwin'
  ext = 'dylib'
else
  ext = 'so'
endif

plugins_rep = {
  'gst-plugin-audiofx': 'libgstrsaudiofx',
  'gst-plugin-cdg': 'libgstcdg',
  'gst-plugin-claxon': 'libgstclaxon',
  'gst-plugin-closedcaption': 'libgstrsclosedcaption',
  'gst-plugin-fallbackswitch': 'libgstfallbackswitch',
  'gst-plugin-file': 'libgstrsfile',
  'gst-plugin-flv': 'libgstrsflv',
  'gst-plugin-lewton': 'libgstlewton',
  'gst-plugin-rav1e': 'libgstrav1e',
  'gst-plugin-reqwest': 'libgstreqwest',
  'gst-plugin-rusoto': 'libgstrusoto',
  'gst-plugin-threadshare': 'libgstthreadshare',
  'gst-plugin-togglerecord': 'libgsttogglerecord',
}

exclude = []
extra_env = {}

if dependency('dav1d', required : get_option('dav1d')).found()
  plugins_rep += {'gst-plugin-dav1d' : 'libgstrsdav1d'}
else
  exclude += ['gst-plugin-dav1d']
endif

sodium = get_option ('sodium')
if sodium == 'system'
  dependency('libsodium')
  plugins_rep += {'gst-plugin-sodium': 'libgstsodium'}
  extra_env += {'SODIUM_USE_PKG_CONFIG': '1'}
elif sodium == 'built-in'
  plugins_rep += {'gst-plugin-sodium': 'libgstsodium'}
else
  exclude += ['gst-plugin-sodium']
endif

cc = meson.get_compiler('c')
csound_option = get_option('csound')
csound_dep = dependency('', required: false) # not-found dependency
if not csound_option.disabled()
  csound_dep = cc.find_library('csound64', required: false)
  if not csound_dep.found()
    python3 = import('python').find_installation('python3')
    res = run_command(python3, '-c', 'import os; print(os.environ["CSOUND_LIB_DIR"])')
    if res.returncode() == 0
      csound_dep = cc.find_library('csound64', dirs: res.stdout(), required: csound_option)
    elif csound_option.enabled()
      error('csound option is enabled, but csound64 library could not be found and CSOUND_LIB_DIR was not set')
    endif
  endif
endif

if csound_dep.found()
  plugins_rep += {'gst-plugin-csound' : 'libgstcsound'}
else
  exclude += ['gst-plugin-csound']
endif

output = []

foreach p, lib : plugins_rep
  # Add the plugin file as output
  output += [lib + '.' + ext]
endforeach

# Need to depends on all gstreamer-rs deps to ensure they are built
# before gstreamer-rs when building with gst-build.
# Custom targets can't depend on dependency() objects so we have to depend
# on the library variable from the subproject instead.
gst_req = '>= 1.14.0'
depends = []

deps = [
  # name, subproject name, subproject dep, library object
  ['gstreamer-1.0', 'gstreamer', 'gst_dep', 'libgst'],
  ['gstreamer-app-1.0', 'gst-plugins-base', 'app_dep', 'gstapp'],
  ['gstreamer-audio-1.0', 'gst-plugins-base', 'audio_dep', 'gstaudio'],
  ['gstreamer-base-1.0', 'gstreamer', 'gst_base_dep', 'gst_base'],
  ['gstreamer-check-1.0', 'gstreamer', 'gst_check_dep', 'gst_check'],
  ['gstreamer-net-1.0', 'gstreamer', 'gst_net_dep', 'gst_net'],
  ['gstreamer-rtp-1.0', 'gst-plugins-base', 'rtp_dep', 'gst_rtp'],
  ['gstreamer-video-1.0', 'gst-plugins-base', 'video_dep', 'gstvideo'],
]

foreach d: deps
  dep = dependency(d[0], version : gst_req,
    fallback : [d[1], d[2]])
  if dep.type_name() == 'internal'
    lib = subproject(d[1]).get_variable(d[3])
    depends += lib
  endif
endforeach

exclude = ','.join(exclude)

# serialize extra_env
extra_env_list = []
foreach key, value : extra_env
  extra_env_list += key + ':' + value
endforeach
extra_env_str = ','.join(extra_env_list)

plugins_install_dir = get_option('libdir') / 'gstreamer-1.0'

# Always build the target so we don't have to list all source files as input
rs_plugins = custom_target('gst-plugins-rs',
  build_by_default: true,
  output: output,
  console: true,
  install: true,
  install_dir: plugins_install_dir,
  build_always_stale: true,
  depends: depends,
  command: [cargo_wrapper,
    'build',
    meson.current_build_dir(),
    meson.current_source_dir(),
    meson.build_root(),
    target,
    exclude,
    extra_env_str,
    ext])

# FIXME: raises a warning as the target has multiple outputs and meson will use
# only the first one. All the plugins have the same basedir, hence
# GST_PLUGIN_PATH will include them all, so that's ok.
plugins = [rs_plugins]

test('tests',
  cargo_wrapper,
  args: ['test',
    meson.current_build_dir(),
    meson.current_source_dir(),
    meson.build_root(),
    target,
    exclude,
    extra_env_str],
  timeout: 600)