beginning to add a progress string item to the native dbus interface

dbus-service.c

@@ -43,6 +43,17 @@ void dbus_metadata_watcher(struct metadata_bundle *argc, __attribute__((unused))
     shairport_sync_advanced_remote_control_set_available(shairportSyncAdvancedRemoteControlSkeleton,
                                                          FALSE);
   }
+  
+  if (argc->progress_string) {
+  	debug(1, "Check progress string");
+		th = shairport_sync_remote_control_get_progress_string(
+				shairportSyncRemoteControlSkeleton);
+		if ((th == NULL) || (strcasecmp(th, argc->progress_string) != 0)) {
+			debug(1, "Progress string should be changed");
+			shairport_sync_remote_control_set_progress_string(
+					shairportSyncRemoteControlSkeleton, argc->progress_string);
+		}  	
+  }
 
   switch (argc->player_state) {
   case PS_NOT_AVAILABLE:

metadata_hub.c

@@ -517,6 +517,16 @@ void metadata_hub_process_metadata(uint32_t type, uint32_t code, char *data, uin
       }
       break;
     */
+    case 'prgr':
+      if ((metadata_store.progress_string == NULL) ||
+          (strncmp(metadata_store.progress_string, data, length) != 0)) {
+        metadata_hub_modify_prolog();
+        release_char_string(&metadata_store.progress_string);
+        metadata_store.progress_string = strndup(data, length);
+        debug(1, "MH Progress String set to: \"%s\"", metadata_store.progress_string);
+        metadata_hub_modify_epilog(1);
+      }
+      break;
     case 'svip':
       if ((metadata_store.server_ip == NULL) ||
           (strncmp(metadata_store.server_ip, data, length) != 0)) {

metadata_hub.h

@@ -56,6 +56,7 @@ typedef struct metadata_bundle {
   char *client_ip; // IP number used by the audio source (i.e. the "client"), which is also the DACP
                    // server
   char *server_ip; // IP number used by Shairport Sync
+  char *progress_string; // progress string, emitted by the source from time to time
   int player_thread_active; // true if a play thread is running
   int dacp_server_active;   // true if there's a reachable DACP server (assumed to be the Airplay
                             // client) ; false otherwise

org.gnome.ShairportSync.xml

@@ -33,6 +33,7 @@
 		<method name='VolumeUp'/>
 		<method name='VolumeDown'/>
 		<property name='PlayerState' type='s' access='read'/>
+		<property name='ProgressString' type='s' access='read'/>
 		<property name='Server' type='s' access='read'/>
 		<property name='AirplayVolume' type='d' access='read'/>
 		<property name='Metadata' type='a{sv}' access='read'>