gstreamer/subprojects/gst-plugins-bad/gst-libs/gst/opencv/meson.build
Víctor Manuel Jáquez Leal ce91004c3b build: opencv: disable opencv deps if it's not installed
When hotdoc documentation is enabled and opencv plugin is set as
auto-detected, but the library isn't installed, meson configuration fails
with this message:

  ../subprojects/gst-plugins-bad/docs/meson.build:139:21: ERROR: Unknown variable "gstopencv_dep".

This patch fixes this case defined gstopencv_dep as disabler() when
dependencies aren't found.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/5560>
2023-10-26 20:43:14 +00:00

102 lines
3.3 KiB
Meson

if get_option('opencv').disabled()
gstopencv_dep = disabler()
subdir_done()
endif
opencv_sources = [
'gstopencvutils.cpp',
'gstopencvvideofilter.cpp',
]
opencv_headers = [
'opencv-prelude.h',
'gstopencvutils.h',
'gstopencvvideofilter.h',
]
libopencv_headers = [
'opencv2/bgsegm.hpp',
'opencv2/calib3d.hpp',
'opencv2/core.hpp',
'opencv2/imgproc.hpp',
'opencv2/objdetect.hpp',
'opencv2/opencv.hpp',
'opencv2/video.hpp',
'opencv2/tracking.hpp',
]
gstopencv_cargs = ['-DGST_HAAR_CASCADES_DIR="@0@"']
opencv_dep = dependency('opencv', version : ['>= 3.0.0', '< 3.5.0'], required : false)
opencv_found = opencv_dep.found()
if not opencv_found
opencv_dep = dependency('opencv4', version : ['>= 4.0.0'], required : false)
opencv_found = opencv_dep.found()
endif
if opencv_found
foreach h : libopencv_headers
if not cxx.has_header(h, dependencies: opencv_dep)
message('Needed header "' + h + '" not found')
opencv_found = false
endif
endforeach
endif
if opencv_found
opencv_prefix = opencv_dep.get_variable('prefix')
gstopencv_cargs += ['-DOPENCV_PREFIX="' + opencv_prefix + '"']
# opencv4 seems to ship with .pc file that references non-existent include dir
# (/usr/include/opencv4/opencv instead of /usr/include/opencv4/opencv2)
# clang 10 complains about the following header in opencv4
# /usr/include/opencv4/opencv2/flann/logger.h:83:36: error: format string is not a string literal [-Werror,-Wformat-nonliteral]
gstopencv_cargs += cxx.get_supported_arguments(['-Wno-missing-include-dirs', '-Wno-format-nonliteral'])
# Check the data dir used by opencv for its xml data files
# Use prefix from pkg-config to be compatible with cross-compilation
r = run_command('test', '-d', opencv_prefix + '/share/opencv', check: false)
if r.returncode() == 0
gstopencv_cargs += '-DOPENCV_PATH_NAME="opencv"'
else
r = run_command('test', '-d', opencv_prefix + '/share/OpenCV', check: false)
if r.returncode() == 0
gstopencv_cargs += '-DOPENCV_PATH_NAME="OpenCV"'
else
r = run_command('test', '-d', opencv_prefix + '/share/opencv4', check: false)
if r.returncode() == 0
gstopencv_cargs += '-DOPENCV_PATH_NAME="opencv4"'
else
message('Unable to detect OpenCV data directory')
opencv_found = false
endif
endif
endif
endif
if opencv_found
pkg_name = 'gstreamer-opencv-1.0'
gstopencv = library('gstopencv-' + api_version,
opencv_sources,
c_args : gst_plugins_bad_args + ['-DBUILDING_GST_OPENCV'],
cpp_args : gst_plugins_bad_args + gstopencv_cargs + ['-DBUILDING_GST_OPENCV', '-DG_LOG_DOMAIN="GStreamer-OpenCV"'],
override_options : ['cpp_std=c++11'],
include_directories : [configinc, libsinc],
version : libversion,
soversion : soversion,
darwin_versions : osxversion,
install : true,
dependencies : [gstbase_dep, gstvideo_dep, opencv_dep],
)
gst_libraries += [[pkg_name, {'lib': gstopencv}]]
gstopencv_dep = declare_dependency(link_with: gstopencv,
include_directories : [libsinc],
dependencies : [gstvideo_dep, opencv_dep])
meson.override_dependency(pkg_name, gstopencv_dep)
install_headers(opencv_headers, subdir : 'gstreamer-1.0/gst/opencv')
elif get_option('opencv').enabled()
error('OpenCV support enabled but required dependencies were not found.')
else
gstopencv_dep = disabler()
endif