demux: adaptative: add dedicated reactivate stream method

We'll need such overridable method if reselecting a stream
requires global playlist action/refresh.

modules/demux/adaptative/PlaylistManager.cpp

@@ -152,7 +152,7 @@ AbstractStream::status PlaylistManager::demux(mtime_t nzdeadline, bool send)
         if (st->isDisabled())
         {
             if(st->isSelected() && !st->isEOF())
-                st->reactivate(getPCR());
+                reactivateStream(st);
             else
                 continue;
         }
@@ -271,6 +271,11 @@ bool PlaylistManager::updatePlaylist()
     return true;
 }
 
+bool PlaylistManager::reactivateStream(AbstractStream *stream)
+{
+    return stream->reactivate(getPCR());
+}
+
 #define DEMUX_INCREMENT (CLOCK_FREQ / 20)
 int PlaylistManager::demux_callback(demux_t *p_demux)
 {

modules/demux/adaptative/PlaylistManager.h

@@ -71,6 +71,7 @@ namespace adaptative
             virtual int doControl(int, va_list);
             virtual int doDemux(int64_t);
 
+            virtual bool reactivateStream(AbstractStream *);
             bool setupPeriod();
             void unsetPeriod();
             /* local factories */