dataflow.hpp

#pragma once
#include <ossia/dataflow/dataflow_fwd.hpp>
#include <ossia/network/base/node.hpp>
#include <ossia/network/common/path.hpp>
 
#include <vector>
 
namespace ossia
{
struct do_nothing_for_nodes
{
  void operator()(ossia::net::node_base* node, bool) const noexcept { }
};
 
template <typename Fun, typename NodeFun, typename DeviceList_T>
bool apply_to_destination(
    const destination_t& address, const DeviceList_T& devices, Fun f, NodeFun nf)
{
  switch(address.which().index())
  {
    // ossia::net::parameter_base*
    case destination_t::index_of<ossia::net::parameter_base*>().index(): {
      f(*address.target<ossia::net::parameter_base*>(), true);
      return true;
    }
 
    // ossia::traversal::path
    case destination_t::index_of<ossia::traversal::path>().index(): {
      std::vector<ossia::net::node_base*> roots{};
 
      for(auto n : devices)
        roots.push_back(&n->get_root_node());
 
      auto& p = *address.target<ossia::traversal::path>();
      ossia::traversal::apply(p, roots);
 
      const bool unique = roots.size() == 1;
      for(auto n : roots)
        if(auto addr = n->get_parameter())
          f(addr, unique);
        else
          nf(n, unique);
      return unique;
    }
 
    // ossia::net::node_base*
    case destination_t::index_of<ossia::net::node_base*>().index(): {
      nf(*address.target<ossia::net::node_base*>(), true);
      return true;
    }
    default: {
      return true;
    }
  }
}
}