libs/ardour/processor.cc

   1 /*
   2     Copyright (C) 2000 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 #ifdef WAF_BUILD
  21 #include "libardour-config.h"
  22 #endif
  23
  24 #include <string>
  25
  26 #include <sigc++/bind.h>
  27
  28 #include "pbd/failed_constructor.h"
  29 #include "pbd/enumwriter.h"
  30 #include "pbd/xml++.h"
  31
  32 #include "ardour/processor.h"
  33 #include "ardour/plugin.h"
  34 #include "ardour/port.h"
  35 #include "ardour/route.h"
  36 #include "ardour/ladspa_plugin.h"
  37 #include "ardour/buffer_set.h"
  38 #include "ardour/send.h"
  39 #include "ardour/port_insert.h"
  40 #include "ardour/plugin_insert.h"
  41
  42 #ifdef VST_SUPPORT
  43 #include "ardour/vst_plugin.h"
  44 #endif
  45
  46 #ifdef HAVE_AUDIOUNITS
  47 #include "ardour/audio_unit.h"
  48 #endif
  49
  50 #include "ardour/audioengine.h"
  51 #include "ardour/session.h"
  52 #include "ardour/types.h"
  53
  54 #include "i18n.h"
  55
  56 using namespace std;
  57 using namespace ARDOUR;
  58 using namespace PBD;
  59
  60 sigc::signal<void,Processor*> Processor::ProcessorCreated;
  61
  62 // Always saved as Processor, but may be IOProcessor or Send in legacy sessions
  63 const string Processor::state_node_name = "Processor";
  64
  65 Processor::Processor(Session& session, const string& name)
  66         : SessionObject(session, name)
  67         , AutomatableControls(session)
  68         , _pending_active(false)
  69         , _active(false)
  70         , _next_ab_is_active(false)
  71         , _configured(false)
  72         , _gui(0)
  73 {
  74 }
  75
  76 Processor::Processor (Session& session, const XMLNode& node)
  77         : SessionObject(session, "renameMe")
  78         , AutomatableControls(session)
  79         , _pending_active(false)
  80         , _active(false)
  81         , _next_ab_is_active(false)
  82         , _configured(false)
  83         , _gui(0)
  84 {
  85         set_state (node);
  86         _pending_active = _active;
  87 }
  88
  89 XMLNode&
  90 Processor::get_state (void)
  91 {
  92         return state (true);
  93 }
  94
  95 /* NODE STRUCTURE
  96
  97     <Automation [optionally with visible="...." ]>
  98        <parameter-N>
  99          <AutomationList id=N>
 100            <events>
 101            X1 Y1
 102            X2 Y2
 103            ....
 104            </events>
 105        </parameter-N>
 106     <Automation>
 107 */
 108
 109 XMLNode&
 110 Processor::state (bool full_state)
 111 {
 112         XMLNode* node = new XMLNode (state_node_name);
 113         stringstream sstr;
 114         char buf[64];
 115
 116         id().print (buf, sizeof (buf));
 117         node->add_property("id", buf);
 118         node->add_property("name", _name);
 119         node->add_property("active", active() ? "yes" : "no");
 120
 121         if (_extra_xml){
 122                 node->add_child_copy (*_extra_xml);
 123         }
 124
 125         if (full_state) {
 126                 XMLNode& automation = Automatable::get_automation_state();
 127                 if (!automation.children().empty()
 128                                 || !automation.properties().empty()
 129                                 || !_visible_controls.empty()) {
 130
 131                         for (set<Evoral::Parameter>::iterator x = _visible_controls.begin();
 132                                         x != _visible_controls.end(); ++x) {
 133                                 if (x != _visible_controls.begin()) {
 134                                         sstr << ' ';
 135                                 }
 136                                 sstr << *x;
 137                         }
 138
 139                         automation.add_property ("visible", sstr.str());
 140                         node->add_child_nocopy (automation);
 141                 }
 142         }
 143
 144         return *node;
 145 }
 146
 147 int
 148 Processor::set_state (const XMLNode& node)
 149 {
 150         const XMLProperty *prop;
 151         const XMLProperty *legacy_active = 0;
 152
 153         // may not exist for legacy 3.0 sessions
 154         if ((prop = node.property ("name")) != 0) {
 155                 set_name(prop->value());
 156         }
 157
 158         // may not exist for legacy 3.0 sessions
 159         if ((prop = node.property ("id")) != 0) {
 160                 _id = prop->value();
 161         }
 162
 163         XMLNodeList nlist = node.children();
 164         XMLNodeIterator niter;
 165
 166         for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
 167
 168                 if ((*niter)->name() == X_("Automation")) {
 169
 170                         XMLProperty *prop;
 171
 172                         if ((prop = (*niter)->property ("path")) != 0) {
 173                                 old_set_automation_state (*(*niter));
 174                         } else {
 175                                 set_automation_state (*(*niter), Evoral::Parameter(PluginAutomation));
 176                         }
 177
 178                         if ((prop = (*niter)->property ("visible")) != 0) {
 179                                 uint32_t what;
 180                                 stringstream sstr;
 181
 182                                 _visible_controls.clear ();
 183
 184                                 sstr << prop->value();
 185                                 while (1) {
 186                                         sstr >> what;
 187                                         if (sstr.fail()) {
 188                                                 break;
 189                                         }
 190                                         // FIXME: other automation types?
 191                                         mark_automation_visible (Evoral::Parameter(PluginAutomation, 0, what), true);
 192                                 }
 193                         }
 194
 195                 } else if ((*niter)->name() == "Extra") {
 196                         _extra_xml = new XMLNode (*(*niter));
 197                 } else if ((*niter)->name() == "Redirect") {
 198                         if ( !(legacy_active = (*niter)->property("active"))) {
 199                                 error << string_compose(_("No %1 property flag in element %2"), "active", (*niter)->name()) << endl;
 200                         }
 201                 }
 202         }
 203
 204         if ((prop = node.property ("active")) == 0) {
 205                 warning << _("XML node describing a processor is missing the `active' field,"
 206                            "trying legacy active flag from child node") << endmsg;
 207                 if (legacy_active) {
 208                         prop = legacy_active;
 209                 } else {
 210                         error << _("No child node with active property") << endmsg;
 211                         return -1;
 212                 }
 213         }
 214
 215         if (_active != string_is_affirmative (prop->value())) {
 216                 _active = !_active;
 217                 ActiveChanged (); /* EMIT_SIGNAL */
 218         }
 219
 220         return 0;
 221 }
 222
 223 bool
 224 Processor::configure_io (ChanCount in, ChanCount out)
 225 {
 226         /* This class assumes 1:1 input:output.static output stream count.
 227            Derived classes must override and set _configured_output appropriately
 228            if this is not the case
 229         */
 230
 231         _configured_input = in;
 232         _configured_output = out;
 233         _configured = true;
 234
 235         ConfigurationChanged.emit (in, out);
 236
 237         return true;
 238 }