# SPDX-License-Identifier: CC0-1.0

glib_dep = dependency('glib-2.0', required : get_option('gstreamer'))

gst_dep_version = '>=1.14.0'
gstvideo_dep = dependency('gstreamer-video-1.0', version : gst_dep_version,
                          required : get_option('gstreamer'))
gstallocator_dep = dependency('gstreamer-allocators-1.0', version : gst_dep_version,
                              required : get_option('gstreamer'))

if not glib_dep.found() or not gstvideo_dep.found() or not gstallocator_dep.found()
    gst_enabled = false
    subdir_done()
endif

gst_enabled = true

libcamera_gst_sources = [
    'gstlibcamera-utils.cpp',
    'gstlibcamera.cpp',
    'gstlibcameraallocator.cpp',
    'gstlibcamerapad.cpp',
    'gstlibcamerapool.cpp',
    'gstlibcameraprovider.cpp',
    'gstlibcamerasrc.cpp',
]

# Generate gstreamer control properties

gen_gst_controls_template = files('gstlibcamera-controls.cpp.in')
libcamera_gst_sources += custom_target('gstlibcamera-controls.cpp',
                                       input : controls_files,
                                       output : 'gstlibcamera-controls.cpp',
                                       command : [gen_gst_controls, '-o', '@OUTPUT@',
                                                  '-t', gen_gst_controls_template, '@INPUT@'],
                                       env : py_build_env)

libcamera_gst_cpp_args = [
    '-DVERSION="@0@"'.format(libcamera_git_version),
    '-DPACKAGE="@0@"'.format(meson.project_name()),
    '-DGLIB_VERSION_MIN_REQUIRED=GLIB_VERSION_2_40',
]

# The G_DECLARE_FINAL_TYPE macro creates static inline functions that were
# not marked as possibly unused prior to GLib v2.63.0. This causes clang to
# complain about the ones we are not using. Silence the -Wunused-function
# warning in that case.
if cc.get_id() == 'clang' and glib_dep.version().version_compare('<2.63.0')
    libcamera_gst_cpp_args += ['-Wno-unused-function']
endif

libcamera_gst = shared_library('gstlibcamera',
    libcamera_gst_sources,
    cpp_args : libcamera_gst_cpp_args,
    dependencies : [libcamera_public, gstvideo_dep, gstallocator_dep],
    install : true,
    install_dir : '@0@/gstreamer-1.0'.format(get_option('libdir')),
)

# Make the plugin visible to GStreamer inside meson devenv.
fs = import('fs')
gst_plugin_path = fs.parent(libcamera_gst.full_path())

gst_env = environment()
gst_env.prepend('GST_PLUGIN_PATH', gst_plugin_path)

# Avoid polluting the system registry.
gst_env.set('GST_REGISTRY', gst_plugin_path / 'registry.data')

meson.add_devenv(gst_env)