Reorganize serialization code a bit

Move the proxy plugin to the client-node
Move serialization code to pinos because its specific to pinos
Move some functions to the .h files
Make the mapper dynamic

spa/plugins/meson.build

@@ -2,7 +2,6 @@ subdir('alsa')
 subdir('audiomixer')
 subdir('audiotestsrc')
 subdir('ffmpeg')
-subdir('remote')
 #subdir('libva')
 subdir('videotestsrc')
 subdir('volume')

spa/plugins/remote/meson.build

@@ -1,10 +0,0 @@
-remote_sources = ['proxy.c',
-                  'dbus-proxy.c',
-                  'plugin.c']
-
-remotelib = shared_library('spa-remote',
-                           remote_sources,
-                           include_directories : spa_inc,
-                           link_with : spalib,
-                           install : true,
-                           install_dir : '@0@/spa'.format(get_option('libdir')))

spa/plugins/remote/plugin.c

@@ -1,50 +0,0 @@
-/* Spa Volume plugin
- * Copyright (C) 2016 Wim Taymans <wim.taymans@gmail.com>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library 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
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
- */
-
-#include <spa/plugin.h>
-#include <spa/node.h>
-
-extern const SpaHandleFactory spa_proxy_factory;
-extern const SpaHandleFactory spa_dbus_proxy_factory;
-
-SpaResult
-spa_enum_handle_factory (const SpaHandleFactory **factory,
-                         void                   **state)
-{
-  int index;
-
-  if (factory == NULL || state == NULL)
-    return SPA_RESULT_INVALID_ARGUMENTS;
-
-  index = (*state == NULL ? 0 : *(int*)state);
-
-  switch (index) {
-    case 0:
-     *factory = &spa_proxy_factory;
-      break;
-    case 1:
-     *factory = &spa_dbus_proxy_factory;
-      break;
-    default:
-      return SPA_RESULT_ENUM_END;
-  }
-  *(int*)state = ++index;
-
-  return SPA_RESULT_OK;
-}