libs/ardour/slavable.cc

   1 /*
   2     Copyright (C) 2016 Paul Davis
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 2 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17
  18 */
  19
  20 #include <vector>
  21
  22 #include <glibmm/threads.h>
  23
  24 #include "pbd/convert.h"
  25 #include "pbd/error.h"
  26 #include "pbd/xml++.h"
  27
  28 #include "ardour/slavable.h"
  29 #include "ardour/slavable_automation_control.h"
  30 #include "ardour/vca.h"
  31 #include "ardour/vca_manager.h"
  32
  33 #include "i18n.h"
  34
  35 using namespace PBD;
  36 using namespace ARDOUR;
  37
  38 std::string Slavable::xml_node_name = X_("Slavable");
  39 PBD::Signal1<void,VCAManager*> Slavable::Assign; /* signal sent once
  40                                                   * assignment is possible */
  41
  42 Slavable::Slavable ()
  43 {
  44         Assign.connect_same_thread (assign_connection, boost::bind (&Slavable::do_assign, this, _1));
  45 }
  46
  47 XMLNode&
  48 Slavable::get_state () const
  49 {
  50         XMLNode* node = new XMLNode (xml_node_name);
  51         XMLNode* child;
  52
  53         Glib::Threads::RWLock::ReaderLock lm (master_lock);
  54         for (std::set<uint32_t>::const_iterator i = _masters.begin(); i != _masters.end(); ++i) {
  55                 child = new XMLNode (X_("Master"));
  56                 child->add_property (X_("number"), to_string (*i, std::dec));
  57                 node->add_child_nocopy (*child);
  58         }
  59
  60         return *node;
  61 }
  62
  63 int
  64 Slavable::set_state (XMLNode const& node, int version)
  65 {
  66         if (node.name() != xml_node_name) {
  67                 return -1;
  68         }
  69
  70         XMLNodeList const& children (node.children());
  71         Glib::Threads::RWLock::WriterLock lm (master_lock);
  72
  73         for (XMLNodeList::const_iterator i = children.begin(); i != children.end(); ++i) {
  74                 if ((*i)->name() == X_("Master")) {
  75                         XMLProperty const* prop = (*i)->property (X_("number"));
  76                         if (prop) {
  77                                 uint32_t n = atoi (prop->value());
  78                                 _masters.insert (n);
  79                         }
  80                 }
  81         }
  82
  83         return 0;
  84 }
  85
  86 int
  87 Slavable::do_assign (VCAManager* manager)
  88 {
  89         std::vector<boost::shared_ptr<VCA> > vcas;
  90
  91         {
  92                 Glib::Threads::RWLock::ReaderLock lm (master_lock);
  93
  94                 for (std::set<uint32_t>::const_iterator i = _masters.begin(); i != _masters.end(); ++i) {
  95                         boost::shared_ptr<VCA> v = manager->vca_by_number (*i);
  96                         if (v) {
  97                                 vcas.push_back (v);
  98                         } else {
  99                                 warning << string_compose (_("Master #%1 not found, assignment lost"), *i) << endmsg;
 100                         }
 101                 }
 102         }
 103
 104         /* now that we've released the lock, we can do the assignments */
 105
 106         for (std::vector<boost::shared_ptr<VCA> >::iterator v = vcas.begin(); v != vcas.end(); ++v) {
 107                 assign (*v);
 108         }
 109
 110         assign_connection.disconnect ();
 111
 112         return 0;
 113 }
 114
 115 void
 116 Slavable::assign (boost::shared_ptr<VCA> v)
 117 {
 118         assert (v);
 119         Glib::Threads::RWLock::WriterLock lm (master_lock);
 120         if (assign_controls (v) == 0) {
 121                 _masters.insert (v->number());
 122         }
 123
 124         v->Drop.connect_same_thread (unassign_connections, boost::bind (&Slavable::unassign, this, v));
 125 }
 126
 127 void
 128 Slavable::unassign (boost::shared_ptr<VCA> v)
 129 {
 130         Glib::Threads::RWLock::WriterLock lm (master_lock);
 131         (void) unassign_controls (v);
 132         if (v) {
 133                 _masters.erase (v->number());
 134         } else {
 135                 _masters.clear ();
 136         }
 137 }
 138
 139 int
 140 Slavable::assign_controls (boost::shared_ptr<VCA> vca)
 141 {
 142         boost::shared_ptr<SlavableAutomationControl> slave;
 143         boost::shared_ptr<AutomationControl> master;
 144         AutomationType types[] = {
 145                 GainAutomation,
 146                 SoloAutomation,
 147                 MuteAutomation,
 148                 RecEnableAutomation,
 149                 MonitoringAutomation,
 150                 NullAutomation
 151         };
 152
 153         for (uint32_t n = 0; types[n] != NullAutomation; ++n) {
 154
 155                 slave = boost::dynamic_pointer_cast<SlavableAutomationControl> (automation_control (types[n]));
 156                 master = vca->automation_control (types[n]);
 157
 158                 if (slave && master) {
 159                         slave->add_master (master);
 160                 }
 161         }
 162
 163         return 0;
 164 }
 165
 166 int
 167 Slavable::unassign_controls (boost::shared_ptr<VCA> vca)
 168 {
 169         boost::shared_ptr<SlavableAutomationControl> slave;
 170         boost::shared_ptr<AutomationControl> master;
 171         AutomationType types[] = {
 172                 GainAutomation,
 173                 SoloAutomation,
 174                 MuteAutomation,
 175                 RecEnableAutomation,
 176                 MonitoringAutomation,
 177                 NullAutomation
 178         };
 179
 180         for (uint32_t n = 0; types[n] != NullAutomation; ++n) {
 181
 182                 slave = boost::dynamic_pointer_cast<SlavableAutomationControl> (automation_control (types[n]));
 183
 184                 if (!vca) {
 185                         /* unassign from all */
 186                         if (slave) {
 187                                 slave->clear_masters ();
 188                         }
 189                 } else {
 190                         master = vca->automation_control (types[n]);
 191                         if (slave && master) {
 192                                 slave->remove_master (master);
 193                         }
 194                 }
 195         }
 196
 197         return 0;
 198 }