libs/ardour/graphnode.cc

   1
   2 #include "ardour/graph.h"
   3 #include "ardour/graphnode.h"
   4 #include "ardour/route.h"
   5
   6 using namespace ARDOUR;
   7
   8 // ========================================== GraphNode
   9
  10 GraphNode::GraphNode( graph_ptr_t graph )
  11   : _graph(graph)
  12 { }
  13
  14 void
  15 GraphNode::prep( int chain )
  16 {
  17     _refcount = _init_refcount[chain];
  18 }
  19
  20 void
  21 GraphNode::dec_ref()
  22 {
  23     if (g_atomic_int_dec_and_test( &_refcount ))
  24         _graph->trigger( this );
  25 }
  26
  27 void
  28 GraphNode::finish( int chain )
  29 {
  30     node_set_t::iterator i;
  31     bool feeds_somebody = false;
  32     for (i=_activation_set[chain].begin(); i!=_activation_set[chain].end(); i++)
  33     {
  34         (*i)->dec_ref();
  35         feeds_somebody = true;
  36     }
  37     if (!feeds_somebody)
  38     {
  39         _graph->dec_ref();
  40     }
  41 }
  42
  43
  44 void
  45 GraphNode::process()
  46 {
  47     _graph->process_one_route( dynamic_cast<Route *>(this) );
  48 }