libs/ardour/automation_list.cc

   1 /*
   2     Copyright (C) 2002 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 <set>
  21 #include <climits>
  22 #include <float.h>
  23 #include <cmath>
  24 #include <sstream>
  25 #include <algorithm>
  26 #include "ardour/automation_list.h"
  27 #include "ardour/event_type_map.h"
  28 #include "evoral/Curve.hpp"
  29 #include "pbd/stacktrace.h"
  30 #include "pbd/enumwriter.h"
  31
  32 #include "i18n.h"
  33
  34 using namespace std;
  35 using namespace ARDOUR;
  36 using namespace PBD;
  37
  38 PBD::Signal1<void,AutomationList *> AutomationList::AutomationListCreated;
  39
  40 #if 0
  41 static void dumpit (const AutomationList& al, string prefix = "")
  42 {
  43         cerr << prefix << &al << endl;
  44         for (AutomationList::const_iterator i = al.const_begin(); i != al.const_end(); ++i) {
  45                 cerr << prefix << '\t' << (*i)->when << ',' << (*i)->value << endl;
  46         }
  47         cerr << "\n";
  48 }
  49 #endif
  50
  51 AutomationList::AutomationList (Evoral::Parameter id)
  52         : ControlList(id)
  53 {
  54         _state = Off;
  55         _style = Absolute;
  56         _touching = false;
  57
  58         create_curve_if_necessary();
  59
  60         assert(_parameter.type() != NullAutomation);
  61         AutomationListCreated(this);
  62 }
  63
  64 AutomationList::AutomationList (const AutomationList& other)
  65         : StatefulDestructible()
  66         , ControlList(other)
  67 {
  68         _style = other._style;
  69         _state = other._state;
  70         _touching = other._touching;
  71
  72         create_curve_if_necessary();
  73
  74         assert(_parameter.type() != NullAutomation);
  75         AutomationListCreated(this);
  76 }
  77
  78 AutomationList::AutomationList (const AutomationList& other, double start, double end)
  79         : ControlList(other, start, end)
  80 {
  81         _style = other._style;
  82         _state = other._state;
  83         _touching = other._touching;
  84
  85         create_curve_if_necessary();
  86
  87         assert(_parameter.type() != NullAutomation);
  88         AutomationListCreated(this);
  89 }
  90
  91 /** @param id is used for legacy sessions where the type is not present
  92  * in or below the AutomationList node.  It is used if @param id is non-null.
  93  */
  94 AutomationList::AutomationList (const XMLNode& node, Evoral::Parameter id)
  95         : ControlList(id)
  96 {
  97         _touching = false;
  98         _state = Off;
  99         _style = Absolute;
 100
 101         set_state (node, Stateful::loading_state_version);
 102
 103         if (id) {
 104                 _parameter = id;
 105         }
 106
 107         create_curve_if_necessary();
 108
 109         assert(_parameter.type() != NullAutomation);
 110         AutomationListCreated(this);
 111 }
 112
 113 AutomationList::~AutomationList()
 114 {
 115 }
 116
 117 boost::shared_ptr<Evoral::ControlList>
 118 AutomationList::create(Evoral::Parameter id)
 119 {
 120         return boost::shared_ptr<Evoral::ControlList>(new AutomationList(id));
 121 }
 122
 123 void
 124 AutomationList::create_curve_if_necessary()
 125 {
 126         switch (_parameter.type()) {
 127         case GainAutomation:
 128         case PanAutomation:
 129         case FadeInAutomation:
 130         case FadeOutAutomation:
 131         case EnvelopeAutomation:
 132                 create_curve();
 133                 break;
 134         default:
 135                 break;
 136         }
 137 }
 138
 139 bool
 140 AutomationList::operator== (const AutomationList& other)
 141 {
 142         return _events == other._events;
 143 }
 144
 145 AutomationList&
 146 AutomationList::operator= (const AutomationList& other)
 147 {
 148         if (this != &other) {
 149
 150                 _events.clear ();
 151
 152                 for (const_iterator i = other._events.begin(); i != other._events.end(); ++i) {
 153                         _events.push_back (new Evoral::ControlEvent (**i));
 154                 }
 155
 156                 _min_yval = other._min_yval;
 157                 _max_yval = other._max_yval;
 158                 _max_xval = other._max_xval;
 159                 _default_value = other._default_value;
 160
 161                 mark_dirty ();
 162                 maybe_signal_changed ();
 163         }
 164
 165         return *this;
 166 }
 167
 168 void
 169 AutomationList::maybe_signal_changed ()
 170 {
 171         ControlList::maybe_signal_changed ();
 172
 173         if (!ControlList::frozen()) {
 174                 StateChanged (); /* EMIT SIGNAL */
 175         }
 176 }
 177
 178 void
 179 AutomationList::set_automation_state (AutoState s)
 180 {
 181         if (s != _state) {
 182                 _state = s;
 183                 automation_state_changed (); /* EMIT SIGNAL */
 184         }
 185 }
 186
 187 void
 188 AutomationList::set_automation_style (AutoStyle s)
 189 {
 190         if (s != _style) {
 191                 _style = s;
 192                 automation_style_changed (); /* EMIT SIGNAL */
 193         }
 194 }
 195
 196 void
 197 AutomationList::start_touch ()
 198 {
 199         _touching = true;
 200         _new_value = true;
 201 }
 202
 203 void
 204 AutomationList::stop_touch ()
 205 {
 206         _touching = false;
 207         _new_value = false;
 208 }
 209
 210 void
 211 AutomationList::thaw ()
 212 {
 213         ControlList::thaw();
 214
 215         if (_changed_when_thawed) {
 216                 _changed_when_thawed = false;
 217                 StateChanged(); /* EMIT SIGNAL */
 218         }
 219 }
 220
 221 XMLNode&
 222 AutomationList::get_state ()
 223 {
 224         return state (true);
 225 }
 226
 227 XMLNode&
 228 AutomationList::state (bool full)
 229 {
 230         XMLNode* root = new XMLNode (X_("AutomationList"));
 231         char buf[64];
 232         LocaleGuard lg (X_("POSIX"));
 233
 234         root->add_property ("automation-id", EventTypeMap::instance().to_symbol(_parameter));
 235
 236         root->add_property ("id", _id.to_s());
 237
 238         snprintf (buf, sizeof (buf), "%.12g", _default_value);
 239         root->add_property ("default", buf);
 240         snprintf (buf, sizeof (buf), "%.12g", _min_yval);
 241         root->add_property ("min-yval", buf);
 242         snprintf (buf, sizeof (buf), "%.12g", _max_yval);
 243         root->add_property ("max-yval", buf);
 244         snprintf (buf, sizeof (buf), "%.12g", _max_xval);
 245         root->add_property ("max-xval", buf);
 246
 247         root->add_property ("interpolation-style", enum_2_string (_interpolation));
 248
 249         if (full) {
 250                 root->add_property ("state", auto_state_to_string (_state));
 251         } else {
 252                 /* never save anything but Off for automation state to a template */
 253                 root->add_property ("state", auto_state_to_string (Off));
 254         }
 255
 256         root->add_property ("style", auto_style_to_string (_style));
 257
 258         if (!_events.empty()) {
 259                 root->add_child_nocopy (serialize_events());
 260         }
 261
 262         return *root;
 263 }
 264
 265 XMLNode&
 266 AutomationList::serialize_events ()
 267 {
 268         XMLNode* node = new XMLNode (X_("events"));
 269         stringstream str;
 270
 271         str.precision(15);  //10 digits is enough digits for 24 hours at 96kHz
 272
 273         for (iterator xx = _events.begin(); xx != _events.end(); ++xx) {
 274                 str << (double) (*xx)->when;
 275                 str << ' ';
 276                 str <<(double) (*xx)->value;
 277                 str << '\n';
 278         }
 279
 280         /* XML is a bit wierd */
 281
 282         XMLNode* content_node = new XMLNode (X_("foo")); /* it gets renamed by libxml when we set content */
 283         content_node->set_content (str.str());
 284
 285         node->add_child_nocopy (*content_node);
 286
 287         return *node;
 288 }
 289
 290 int
 291 AutomationList::deserialize_events (const XMLNode& node)
 292 {
 293         if (node.children().empty()) {
 294                 return -1;
 295         }
 296
 297         XMLNode* content_node = node.children().front();
 298
 299         if (content_node->content().empty()) {
 300                 return -1;
 301         }
 302
 303         ControlList::freeze ();
 304         clear ();
 305
 306         stringstream str (content_node->content());
 307
 308         double x;
 309         double y;
 310         bool ok = true;
 311
 312         while (str) {
 313                 str >> x;
 314                 if (!str) {
 315                         break;
 316                 }
 317                 str >> y;
 318                 if (!str) {
 319                         ok = false;
 320                         break;
 321                 }
 322                 fast_simple_add (x, y);
 323         }
 324
 325         if (!ok) {
 326                 clear ();
 327                 error << _("automation list: cannot load coordinates from XML, all points ignored") << endmsg;
 328         } else {
 329                 mark_dirty ();
 330                 reposition_for_rt_add (0);
 331                 maybe_signal_changed ();
 332         }
 333
 334         thaw ();
 335
 336         return 0;
 337 }
 338
 339 int
 340 AutomationList::set_state (const XMLNode& node, int version)
 341 {
 342         XMLNodeList nlist = node.children();
 343         XMLNode* nsos;
 344         XMLNodeIterator niter;
 345         const XMLProperty* prop;
 346
 347         if (node.name() == X_("events")) {
 348                 /* partial state setting*/
 349                 return deserialize_events (node);
 350         }
 351
 352         if (node.name() == X_("Envelope") || node.name() == X_("FadeOut") || node.name() == X_("FadeIn")) {
 353
 354                 if ((nsos = node.child (X_("AutomationList")))) {
 355                         /* new school in old school clothing */
 356                         return set_state (*nsos, version);
 357                 }
 358
 359                 /* old school */
 360
 361                 const XMLNodeList& elist = node.children();
 362                 XMLNodeConstIterator i;
 363                 XMLProperty* prop;
 364                 nframes_t x;
 365                 double y;
 366
 367                 ControlList::freeze ();
 368                 clear ();
 369
 370                 for (i = elist.begin(); i != elist.end(); ++i) {
 371
 372                         if ((prop = (*i)->property ("x")) == 0) {
 373                                 error << _("automation list: no x-coordinate stored for control point (point ignored)") << endmsg;
 374                                 continue;
 375                         }
 376                         x = atoi (prop->value().c_str());
 377
 378                         if ((prop = (*i)->property ("y")) == 0) {
 379                                 error << _("automation list: no y-coordinate stored for control point (point ignored)") << endmsg;
 380                                 continue;
 381                         }
 382                         y = atof (prop->value().c_str());
 383
 384                         fast_simple_add (x, y);
 385                 }
 386
 387                 thaw ();
 388
 389                 return 0;
 390         }
 391
 392         if (node.name() != X_("AutomationList") ) {
 393                 error << string_compose (_("AutomationList: passed XML node called %1, not \"AutomationList\" - ignored"), node.name()) << endmsg;
 394                 return -1;
 395         }
 396
 397         if ((prop = node.property ("id")) != 0) {
 398                 _id = prop->value ();
 399                 /* update session AL list */
 400                 AutomationListCreated(this);
 401         }
 402
 403         if ((prop = node.property (X_("automation-id"))) != 0){
 404                 _parameter = EventTypeMap::instance().new_parameter(prop->value());
 405         } else {
 406                 warning << "Legacy session: automation list has no automation-id property.";
 407         }
 408
 409         if ((prop = node.property (X_("interpolation-style"))) != 0) {
 410                 _interpolation = (InterpolationStyle)string_2_enum(prop->value(), _interpolation);
 411         } else {
 412                 _interpolation = Linear;
 413         }
 414
 415         if ((prop = node.property (X_("default"))) != 0){
 416                 _default_value = atof (prop->value().c_str());
 417         } else {
 418                 _default_value = 0.0;
 419         }
 420
 421         if ((prop = node.property (X_("style"))) != 0) {
 422                 _style = string_to_auto_style (prop->value());
 423         } else {
 424                 _style = Absolute;
 425         }
 426
 427         if ((prop = node.property (X_("state"))) != 0) {
 428                 _state = string_to_auto_state (prop->value());
 429         } else {
 430                 _state = Off;
 431         }
 432
 433         if ((prop = node.property (X_("min_yval"))) != 0) {
 434                 _min_yval = atof (prop->value ().c_str());
 435         } else {
 436                 _min_yval = FLT_MIN;
 437         }
 438
 439         if ((prop = node.property (X_("max_yval"))) != 0) {
 440                 _max_yval = atof (prop->value ().c_str());
 441         } else {
 442                 _max_yval = FLT_MAX;
 443         }
 444
 445         if ((prop = node.property (X_("max_xval"))) != 0) {
 446                 _max_xval = atof (prop->value ().c_str());
 447         } else {
 448                 _max_xval = 0; // means "no limit ;
 449         }
 450
 451         bool have_events = false;
 452
 453         for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
 454                 if ((*niter)->name() == X_("events")) {
 455                         deserialize_events (*(*niter));
 456                         have_events = true;
 457                 }
 458         }
 459
 460         if (!have_events) {
 461                 /* there was no Events child node; clear any current events */
 462                 freeze ();
 463                 clear ();
 464                 mark_dirty ();
 465                 reposition_for_rt_add (0);
 466                 maybe_signal_changed ();
 467                 thaw ();
 468         }
 469
 470         return 0;
 471 }
 472