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redirect.cc

/*
    Copyright (C) 2001 Paul Davis 

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program 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 General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

    $Id: redirect.cc,v 1.43 2005/09/09 01:57:57 pauld Exp $
*/

#include <fstream>
#include <algorithm>
#include <string>
#include <cerrno>
#include <unistd.h>
#include <sstream>

#include <sigc++/bind.h>

#include <pbd/xml++.h>

#include <ardour/redirect.h>
#include <ardour/session.h>
#include <ardour/utils.h>
#include <ardour/send.h>
#include <ardour/insert.h>

#include "i18n.h"

using namespace std;
using namespace ARDOUR;
using namespace SigC;

const string Redirect::state_node_name = "Redirect";
Signal1<void,Redirect*> Redirect::RedirectCreated;

Redirect::Redirect (Session& s, const string& name, Placement p,

                int input_min, int input_max, int output_min, int output_max)
      : IO (s, name, input_min, input_max, output_min, output_max)
{
      _placement = p;
      _active = false;
      _sort_key = 0;
      _gui = 0;
      _extra_xml = 0;
}

Redirect::~Redirect ()
{
}

Redirect*
Redirect::clone (const Redirect& other)
{
      const Send *send;
      const PortInsert *port_insert;
      const PluginInsert *plugin_insert;

      if ((send = dynamic_cast<const Send*>(&other)) != 0) {
            return new Send (*send);
      } else if ((port_insert = dynamic_cast<const PortInsert*>(&other)) != 0) {
            return new PortInsert (*port_insert);
      } else if ((plugin_insert = dynamic_cast<const PluginInsert*>(&other)) != 0) {
            return new PluginInsert (*plugin_insert);
      } else {
            fatal << _("programming error: unknown Redirect type in Redirect::Clone!\n")
                  << endmsg;
            /*NOTREACHED*/
      }
      return 0;
}

void
Redirect::set_placement (Placement p, void *src)
{
      if (_placement != p) {
            _placement = p;
             placement_changed (this, src); /* EMIT SIGNAL */
      }
}

void
Redirect::set_placement (const string& str, void *src)
{
      if (str == _("pre")) {
            set_placement (PreFader, this);
      } else if (str == _("post")) {
            set_placement (PostFader, this);
      } else {
            error << compose(_("Redirect: unknown placement string \"%1\" (ignored)"), str) << endmsg;
      }
}

int
Redirect::load_automation (string path)
{
      string fullpath;

      if (path[0] == '/') { // legacy
            fullpath = path;
      } else {
            fullpath = _session.automation_dir();
            fullpath += path;
      }
      ifstream in (fullpath.c_str());

      if (!in) {
            warning << compose(_("%1: cannot open %2 to load automation data (%3)"), _name, fullpath, strerror (errno)) << endmsg;
            return 1;
      }

      LockMonitor lm (_automation_lock, __LINE__, __FILE__);
      set<uint32_t> tosave;
      parameter_automation.clear ();

      while (in) {
            double when;
            double value;
            uint32_t port;

            in >> port;     if (!in) break;
            in >> when;  if (!in) goto bad;
            in >> value; if (!in) goto bad;
            
            AutomationList& al = automation_list (port);
            al.add (when, value);
            tosave.insert (port);
      }
      
      for (set<uint32_t>::iterator i = tosave.begin(); i != tosave.end(); ++i) {
            automation_list (*i).save_state (_("loaded from disk"));
      }
      
      return 0;

  bad:
      error << compose(_("%1: cannot load automation data from %2"), _name, fullpath) << endmsg;
      parameter_automation.clear ();
      return -1;
}

int
Redirect::save_automation (string path)
{
      LockMonitor lm (_automation_lock, __LINE__, __FILE__);
      string fullpath;

      if (parameter_automation.empty()) {
            return 1;
      }

      fullpath = _session.automation_dir();
      fullpath += path;

      ofstream out (fullpath.c_str());

      if (!out) {
            error << compose(_("%1: cannot open %2 to store automation data (%3)"), _name, fullpath, strerror (errno)) << endmsg;
            return -1;
      }

      AutomationList::const_iterator i;
      map<uint32_t,AutomationList*>::iterator li;
      
      for (li = parameter_automation.begin(); li != parameter_automation.end(); ++li) {
            for (i = (*li).second->begin(); i != (*li).second->end(); ++i) {
                  
                  out << (*li).first << ' ' << (*i)->when << ' ' << (*i)->value << endl;
                  
                  if (!out) {
                        break;
                  }
            }
            
            if (i != (*li).second->end()) {
                  unlink (fullpath.c_str());
                  error << compose(_("%1: could not save automation state to %2"), _name, fullpath) << endmsg;
                  return -1;
            }
      }

      if (li != parameter_automation.end()) {
            unlink (fullpath.c_str());
            error << compose(_("%1: could not save automation state to %2"), _name, fullpath) << endmsg;
            return -1;
      }

      return 0;
}

XMLNode&
Redirect::get_state (void)
{
      return state (true);
}

XMLNode&
Redirect::state (bool full_state)
{
      char buf[64];
      XMLNode* node = new XMLNode (state_node_name);
      stringstream sstr;

      node->add_property("active", active() ? "yes" : "no");      
      node->add_property("placement", placement_as_string (placement()));
      node->add_child_nocopy (IO::state (full_state));

      if (_extra_xml){
            node->add_child_copy (*_extra_xml);
      }
      
      if (full_state) {

            string path;
            string legal_name;
            
            snprintf (buf, sizeof(buf), "%" PRIu64, id());
            path = _session.snap_name();
            path += "-redirect-";
            path += buf;
            path += ".automation";
            
            /* XXX we didn't ask for a state save, we asked for the current state.
               FIX ME!
            */
            
            switch (save_automation (path)) {
            case -1:
                  error << compose(_("Could not get state from Redirect (%1).  Problem with save_automation"), _name) << endmsg;
                  break;
                  
            case 0:
                  XMLNode *aevents = node->add_child("Automation");
                  
                  for (set<uint32_t>::iterator x = visible_parameter_automation.begin(); x != visible_parameter_automation.end(); ++x) {
                        if (x != visible_parameter_automation.begin()) {
                              sstr << ' ';
                        }
                        sstr << *x;
                  }
                  
                  aevents->add_property ("path", path);
                  aevents->add_property ("visible", sstr.str());
                  break;
            }
      }

      return *node;
}

void
Redirect::what_has_automation (set<uint32_t>& s) const
{
      LockMonitor lm (_automation_lock, __LINE__, __FILE__);
      map<uint32_t,AutomationList*>::const_iterator li;
      
      for (li = parameter_automation.begin(); li != parameter_automation.end(); ++li) {
            s.insert  ((*li).first);
      }
}

void
Redirect::what_has_visible_automation (set<uint32_t>& s) const
{
      LockMonitor lm (_automation_lock, __LINE__, __FILE__);
      set<uint32_t>::const_iterator li;
      
      for (li = visible_parameter_automation.begin(); li != visible_parameter_automation.end(); ++li) {
            s.insert  (*li);
      }
}

int
Redirect::set_state (const XMLNode& node)
{
      const XMLProperty *prop;

      if (node.name() != state_node_name) {
            error << compose(_("incorrect XML node \"%1\" passed to Redirect object"), node.name()) << endmsg;
            return -1;
      }

      XMLNodeList nlist = node.children();
      XMLNodeIterator niter;
      bool have_io = false;

      for (niter = nlist.begin(); niter != nlist.end(); ++niter) {

            if ((*niter)->name() == IO::state_node_name) {

                  IO::set_state (**niter);
                  have_io = true;

            } else if ((*niter)->name() == "Automation") {

                  XMLProperty *prop;
                  
                  if ((prop = (*niter)->property ("path")) != 0) {
                        load_automation (prop->value());
                  } else {
                        warning << compose(_("%1: Automation node has no path property"), _name) << endmsg;
                  }

                  if ((prop = (*niter)->property ("visible")) != 0) {
                        uint32_t what;
                        stringstream sstr;

                        visible_parameter_automation.clear ();
                        
                        sstr << prop->value();
                        while (1) {
                              sstr >> what;
                              if (sstr.fail()) {
                                    break;
                              }
                              mark_automation_visible (what, true);
                        }
                  }

            } else if ((*niter)->name() == "extra") {
                  _extra_xml = new XMLNode (*(*niter));
            }
      }

      if (!have_io) {
            error << _("XML node describing an IO is missing an IO node") << endmsg;
            return -1;
      }

      if ((prop = node.property ("active")) == 0) {
            error << _("XML node describing a redirect is missing the `active' field") << endmsg;
            return -1;
      }

      if (_active != (prop->value() == "yes")) {
            _active = !_active;
            active_changed (this, this); /* EMIT_SIGNAL */
      }
      
      if ((prop = node.property ("placement")) == 0) {
            error << _("XML node describing a redirect is missing the `placement' field") << endmsg;
            return -1;
      }

      set_placement (prop->value(), this);

      return 0;
}

AutomationList&
Redirect::automation_list (uint32_t parameter)
{
      AutomationList* al = parameter_automation[parameter];

      if (al == 0) {
            al = parameter_automation[parameter] = new AutomationList (default_parameter_value (parameter));
            /* let derived classes do whatever they need with this */
            automation_list_creation_callback (parameter, *al);
      }

      return *al;
}

string
Redirect::describe_parameter (uint32_t which)
{
      /* derived classes will override this */
      return "";
}

void
Redirect::can_automate (uint32_t what)
{
      can_automate_list.insert (what);
}

void
Redirect::mark_automation_visible (uint32_t what, bool yn)
{
      if (yn) {
            visible_parameter_automation.insert (what);
      } else {
            set<uint32_t>::iterator i;

            if ((i = visible_parameter_automation.find (what)) != visible_parameter_automation.end()) {
                  visible_parameter_automation.erase (i);
            }
      }
}

bool
Redirect::find_next_event (jack_nframes_t now, jack_nframes_t end, ControlEvent& next_event) const
{
      map<uint32_t,AutomationList*>::const_iterator li;     
      AutomationList::TimeComparator cmp;

      next_event.when = max_frames;
      
      for (li = parameter_automation.begin(); li != parameter_automation.end(); ++li) {
            
            AutomationList::const_iterator i;
            const AutomationList& alist (*((*li).second));
            ControlEvent cp (now, 0.0f);
            
            for (i = lower_bound (alist.const_begin(), alist.const_end(), &cp, cmp); i != alist.const_end() && (*i)->when < end; ++i) {
                  if ((*i)->when > now) {
                        break; 
                  }
            }
            
            if (i != alist.const_end() && (*i)->when < end) {
                  
                  if ((*i)->when < next_event.when) {
                        next_event.when = (*i)->when;
                  }
            }
      }

      return next_event.when != max_frames;
}

void
Redirect::store_state (RedirectState& state) const
{
      state.active = _active;
}

Change
Redirect::restore_state (StateManager::State& state)
{
      RedirectState* rstate = dynamic_cast<RedirectState*> (&state);
      set_active (rstate->active, this);
      return Change (0);
}

StateManager::State*
Redirect::state_factory (std::string why) const
{
      RedirectState* state = new RedirectState (why);

      store_state (*state);

      return state;
}

void
Redirect::set_active (bool yn, void* src)
{
      _active = yn; 
      save_state (_("active_changed"));
      active_changed (this, src); 
      _session.set_dirty ();
}


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