Move provider plugins into a dedicated directory

Since we will introduce another type of plugin for the policy engine
we want to have each plugin type in separate directories.

We also have to adjust:

- plugin search directories
- po file location
- update paths for calls-doc target

plugins/provider/sip/meson.build

@@ -0,0 +1,96 @@
+#
+# Copyright (C) 2021 Purism SPC
+#
+# This file is part of Calls.
+#
+# Calls is free software: you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Calls is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Calls.  If not, see <http://www.gnu.org/licenses/>.
+#
+# Author: Evangelos Ribeiro Tzaras <evangelos.tzaras@puri.sm>
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+
+sip_include = include_directories('.')
+
+sip_install_dir = join_paths(full_calls_plugin_libdir, 'sip')
+
+sip_plugin = configure_file(
+  input: 'sip.plugin.in',
+  output: 'sip.plugin',
+  configuration: config_data,
+  install_dir: sip_install_dir
+)
+
+sip_deps = [
+  dependency('gobject-2.0'),
+  dependency('gstreamer-1.0'),
+  dependency('gtk+-3.0'),
+  dependency('libhandy-1', version: '>= 1.1.90'),
+  dependency('libpeas-1.0'),
+  dependency('sofia-sip-ua-glib'),
+  dependency('libsecret-1'),
+]
+
+sip_sources = files(
+  [
+    'calls-sdp-crypto-context.c', 'calls-sdp-crypto-context.h',
+    'calls-sip-call.c', 'calls-sip-call.h',
+    'calls-sip-origin.c', 'calls-sip-origin.h',
+    'calls-sip-provider.c', 'calls-sip-provider.h',
+    'calls-sip-util.c', 'calls-sip-util.h',
+    'calls-sip-media-manager.c', 'calls-sip-media-manager.h',
+    'calls-sip-media-pipeline.c', 'calls-sip-media-pipeline.h',
+    'calls-sip-account-widget.c', 'calls-sip-account-widget.h',
+    'calls-srtp-utils.c', 'calls-srtp-utils.h',
+    'gst-rfc3551.c', 'gst-rfc3551.h',
+  ]
+)
+
+pipeline_enum_headers = [
+  'calls-sip-media-pipeline.h',
+]
+
+pipeline_enums = gnome.mkenums_simple('calls-media-pipeline-enums',
+                                      sources: pipeline_enum_headers)
+sip_sources += pipeline_enums
+
+sip_enum_headers = [
+  'calls-sdp-crypto-context.h',
+  'calls-sip-util.h',
+]
+
+sip_enums = gnome.mkenums_simple('calls-sip-enums',
+                                 sources: sip_enum_headers,
+)
+
+sip_sources += sip_enums
+
+sip_resources = gnome.compile_resources(
+  'sip-resources',
+  'sip.gresources.xml',
+  source_dir: '.',
+  c_name: 'call',
+)
+
+sip_sources += sip_resources
+
+calls_sip = shared_module(
+  'sip',
+  sip_sources,
+  dependencies: sip_deps,
+  include_directories: src_include,
+  link_with: libcalls,
+  install: true,
+  install_dir: sip_install_dir
+)