Move dbus code to a separate process to allow gpu-screen-recorder to use cap_sys_nice for better recording performance on amd

meson.build

@@ -76,10 +76,9 @@ uses_pipewire = false
 if get_option('portal') == true
     src += [
         'src/capture/portal.c',
-        'src/dbus.c',
+        'dbus/client/dbus_client.c',
         'src/pipewire_video.c',
     ]
-    dep += dependency('dbus-1')
     add_project_arguments('-DGSR_PORTAL', language : ['c', 'cpp'])
     uses_pipewire = true
 endif
@@ -104,6 +103,10 @@ add_project_arguments('-DGSR_VERSION="' + meson.project_version() + '"', languag
 executable('gsr-kms-server', 'kms/server/kms_server.c', dependencies : dependency('libdrm'), c_args : '-fstack-protector-all', install : true)
 executable('gpu-screen-recorder', src, dependencies : dep, install : true)
 
+if get_option('portal') == true
+    executable('gsr-dbus-server', ['dbus/server/dbus_server.c', 'dbus/dbus_impl.c'], dependencies : dependency('dbus-1'), install : true)
+endif
+
 if get_option('systemd') == true
     install_data(files('extra/gpu-screen-recorder.service'), install_dir : 'lib/systemd/user')
 endif