Fix python 3.8 compatibility on ubuntu 20.04 (gstreamer 1.16.2)

build-gst-python.sh

@@ -4,7 +4,7 @@
 
 LIBPYTHONPATH=""
 PYTHON=${PYTHON:-/usr/bin/python3}
-GST_VERSION=${GST_VERSION:-$(gst-launch-1.0 --version | grep version | tr -s ' ' '\n' | tail -1)}
+GST_VERSION=${GST_VERSION:-$(gst-launch-1.0 --version | grep version | tr -s ' ' '\n' | tail -1 | $PYTHON -c "import sys; print('.'.join(next(sys.stdin).strip().split('.')[:2]))")}
 
 # Ensure pygst to be installed in current environment
 LIBPYTHON=$($PYTHON -c 'from distutils import sysconfig; print(sysconfig.get_config_var("LDLIBRARY"))')
@@ -28,10 +28,13 @@ cd gst-python
 export PYTHON=$PYTHON
 git checkout $GST_VERSION
 
-./autogen.sh --disable-gtk-doc --noconfigure
-./configure --with-libpython-dir=$LIBPYTHONPATH --prefix $GST_PREFIX
-make
-make install
+#./autogen.sh --disable-gtk-doc --noconfigure
+#./configure --with-libpython-dir=$LIBPYTHONPATH --prefix $GST_PREFIX
+#make
+#make install
+meson --prefix=$GST_PREFIX --libdir=$GST_PREFIX/lib -Dpython=$PYTHON -Dlibpython-dir=$LIBPYTHONPATH -Dbuildtype=release build
+#ninja -C build
+ninja -C build install
 
 cd ../..
 

gstreamer/3rd_party/build.sh

@@ -3,5 +3,13 @@ ROOT=$PWD
 echo "PWD: $PWD"
 
 # Gstreamer
-cd gstreamer
-./build.sh
+#cd gstreamer
+#./build.sh
+BUILD_OPTS=""
+if [[ -n "$GST_PREFIX" ]]; then
+    BUILD_OPTS="${BUILD_OPTS} --prefix ${GST_PREFIX} --libdir=${GST_PREFIX}/lib"
+fi
+echo $BUILD_OPTS
+meson setup $BUILD_OPTS build
+#ninja -C build
+ninja -C build install

gstreamer/3rd_party/gstreamer/CMakeLists.txt

@@ -24,4 +24,6 @@ message("CMAKE_EXE_LINKER_FLAGS: ${CMAKE_EXE_LINKER_FLAGS}")
 
 set_target_properties(gst_objects_info_meta
                       PROPERTIES COMPILE_FLAGS ${CMAKE_C_FLAGS}
-                                 LINKER_FLAGS ${CMAKE_EXE_LINKER_FLAGS})
+                                 LINKER_FLAGS ${CMAKE_EXE_LINKER_FLAGS})
+
+install(TARGETS gst_objects_info_meta DESTINATION lib)

gstreamer/3rd_party/gstreamer/meson.build

@@ -0,0 +1,33 @@
+plugin_c_args = ['-DHAVE_CONFIG_H']
+
+cdata = configuration_data()
+cdata.set_quoted('PACKAGE_VERSION', gst_version)
+cdata.set_quoted('PACKAGE', 'gst-itt4rt-plugin')
+# Gstreamer license list: https://gitlab.freedesktop.org/gstreamer/gstreamer/blob/1.16.0/gst/gstplugin.c
+# BSD or MIT/X11
+cdata.set_quoted('GST_LICENSE', 'Proprietary')
+cdata.set_quoted('GST_API_VERSION', api_version)
+cdata.set_quoted('GST_PACKAGE_NAME', 'GStreamer template Plug-ins')
+cdata.set_quoted('GST_PACKAGE_ORIGIN', 'https://gstreamer.freedesktop.org')
+configure_file(output : 'config.h', configuration : cdata)
+
+#gstaudio_dep = dependency('gstreamer-audio-1.0',
+#    fallback: ['gst-plugins-base', 'audio_dep'])
+
+#gstrtp_dep = dependency('gstreamer-rtp-1.0')
+
+
+# Viewport Glib metadata dynamic library
+viewport_meta_sources = [
+  'gst_objects_info_meta.c'
+  ]
+
+# viewport meta
+# create gst_viewport_meta.dll or libgst_viewport_meta.so
+gst_objects_info_meta = library('gst_objects_info_meta',
+  viewport_meta_sources,
+  c_args: plugin_c_args,
+  dependencies : [gst_dep],
+  install : true,
+  install_dir : plugins_install_dir,
+)

gstreamer/3rd_party/meson.build

@@ -0,0 +1,14 @@
+project('gst-rtp-viewport-metadata', 'c', version : '1.0.0.1', license : 'Proprietary')
+
+plugins_install_dir = join_paths(get_option('libdir'), 'gstreamer-1.0')
+
+cc = meson.get_compiler('c')
+
+gst_version = meson.project_version()
+
+api_version = '1.0'
+
+gst_dep = dependency('gstreamer-1.0',
+    fallback : ['gstreamer', 'gst_dep'])
+
+subdir('gstreamer')

gstreamer/gst_hacks.py

@@ -5,7 +5,7 @@
 from ctypes import *
 from typing import Tuple
 from contextlib import contextmanager
-
+import platform
 import gi
 gi.require_version('Gst', '1.0')
 from gi.repository import Gst  # noqa:F401,F402
@@ -24,8 +24,13 @@ class _GstMapInfo(Structure):
 
 
 _GST_MAP_INFO_POINTER = POINTER(_GstMapInfo)
-
-_libgst = CDLL(os.getenv("LIB_GSTREAMER_PATH", "libgstreamer-1.0.so.0"))
+# we need to check the OS
+# "libgstreamer-1.0.dylib"
+if platform.system() == 'Darwin':
+    _libgst = CDLL(os.getenv("LIB_GSTREAMER_PATH", "libgstreamer-1.0.dylib"))
+else:
+    _libgst = CDLL(os.getenv("LIB_GSTREAMER_PATH", "libgstreamer-1.0.so.0"))
+
 _libgst.gst_buffer_map.argtypes = [c_void_p, _GST_MAP_INFO_POINTER, c_int]
 _libgst.gst_buffer_map.restype = c_int
 

gstreamer/gst_objects_info_meta.py

@@ -24,8 +24,9 @@ class GstObjectInfoArray(Structure):
 
 GstObjectInfoArrayPtr = POINTER(GstObjectInfoArray)
 
-cwd = os.path.dirname(os.path.abspath(__file__))
-libc = CDLL(os.path.join(cwd, "3rd_party/gstreamer/build/libgst_objects_info_meta.so"))
+#cwd = os.path.dirname(os.path.abspath(__file__))
+#libc = CDLL(os.path.join(cwd, "3rd_party/gstreamer/build/libgst_objects_info_meta.so"))
+libc = CDLL("libgst_objects_info_meta.so")
 
 libc.gst_buffer_add_objects_info_meta.argtypes = [c_void_p, GstObjectInfoArrayPtr]
 libc.gst_buffer_add_objects_info_meta.restype = c_void_p

setup.py

@@ -43,7 +43,7 @@ def _run_bash_file(bash_file: str):
 
         cwd = os.path.dirname(os.path.abspath(__file__))
         if not bool(self.skip_gst_python):
-            _run_bash_file(os.path.join(cwd, 'build-gst-python.sh'))
+           _run_bash_file(os.path.join(cwd, 'build-gst-python.sh'))
         _run_bash_file(os.path.join(cwd, 'build-3rd-party.sh'))
 
         _build_py.run(self)