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.begin(); i != al.end(); ++i) {
  45                 cerr << prefix << '\t' << (*i)->when << ',' << (*i)->value << endl;
  46         }
  47         cerr << "\n";
  48 }
  49 #endif
  50 AutomationList::AutomationList (Evoral::Parameter id)
  51         : ControlList(id)
  52 {
  53         _state = Off;
  54         _style = Absolute;
  55         g_atomic_int_set (&_touching, 0);
  56
  57         create_curve_if_necessary();
  58
  59         assert(_parameter.type() != NullAutomation);
  60         AutomationListCreated(this);
  61 }
  62
  63 AutomationList::AutomationList (const AutomationList& other)
  64         : StatefulDestructible()
  65         , ControlList(other)
  66 {
  67         _style = other._style;
  68         _state = other._state;
  69         g_atomic_int_set (&_touching, other.touching());
  70
  71         create_curve_if_necessary();
  72
  73         assert(_parameter.type() != NullAutomation);
  74         AutomationListCreated(this);
  75 }
  76
  77 AutomationList::AutomationList (const AutomationList& other, double start, double end)
  78         : ControlList(other, start, end)
  79 {
  80         _style = other._style;
  81         _state = other._state;
  82         g_atomic_int_set (&_touching, other.touching());
  83
  84         create_curve_if_necessary();
  85
  86         assert(_parameter.type() != NullAutomation);
  87         AutomationListCreated(this);
  88 }
  89
  90 /** @param id is used for legacy sessions where the type is not present
  91  * in or below the AutomationList node.  It is used if @param id is non-null.
  92  */
  93 AutomationList::AutomationList (const XMLNode& node, Evoral::Parameter id)
  94         : ControlList(id)
  95 {
  96         g_atomic_int_set (&_touching, 0);
  97         _state = Off;
  98         _style = Absolute;
  99
 100         set_state (node, Stateful::loading_state_version);
 101
 102         if (id) {
 103                 _parameter = id;
 104         }
 105
 106         create_curve_if_necessary();
 107
 108         assert(_parameter.type() != NullAutomation);
 109         AutomationListCreated(this);
 110 }
 111
 112 AutomationList::~AutomationList()
 113 {
 114 }
 115
 116 boost::shared_ptr<Evoral::ControlList>
 117 AutomationList::create(Evoral::Parameter id)
 118 {
 119         return boost::shared_ptr<Evoral::ControlList>(new AutomationList(id));
 120 }
 121
 122 void
 123 AutomationList::create_curve_if_necessary()
 124 {
 125         switch (_parameter.type()) {
 126         case GainAutomation:
 127         case PanAzimuthAutomation:
 128         case PanElevationAutomation:
 129         case PanWidthAutomation:
 130         case FadeInAutomation:
 131         case FadeOutAutomation:
 132         case EnvelopeAutomation:
 133                 create_curve();
 134                 break;
 135         default:
 136                 break;
 137         }
 138 }
 139
 140 bool
 141 AutomationList::operator== (const AutomationList& other)
 142 {
 143         return _events == other._events;
 144 }
 145
 146 AutomationList&
 147 AutomationList::operator= (const AutomationList& other)
 148 {
 149         if (this != &other) {
 150
 151                 _events.clear ();
 152
 153                 for (const_iterator i = other._events.begin(); i != other._events.end(); ++i) {
 154                         _events.push_back (new Evoral::ControlEvent (**i));
 155                 }
 156
 157                 _min_yval = other._min_yval;
 158                 _max_yval = other._max_yval;
 159                 _max_xval = other._max_xval;
 160                 _default_value = other._default_value;
 161
 162                 mark_dirty ();
 163                 maybe_signal_changed ();
 164         }
 165
 166         return *this;
 167 }
 168
 169 void
 170 AutomationList::maybe_signal_changed ()
 171 {
 172         ControlList::maybe_signal_changed ();
 173
 174         if (!ControlList::frozen()) {
 175                 StateChanged (); /* EMIT SIGNAL */
 176         }
 177 }
 178
 179 void
 180 AutomationList::set_automation_state (AutoState s)
 181 {
 182         if (s != _state) {
 183                 _state = s;
 184
 185                 if (_state == Write) {
 186                         Glib::Mutex::Lock lm (ControlList::_lock);
 187                         nascent.push_back (new NascentInfo ());
 188                 }
 189                 automation_state_changed (s); /* EMIT SIGNAL */
 190         }
 191 }
 192
 193 void
 194 AutomationList::set_automation_style (AutoStyle s)
 195 {
 196         if (s != _style) {
 197                 _style = s;
 198                 automation_style_changed (); /* EMIT SIGNAL */
 199         }
 200 }
 201
 202 void
 203 AutomationList::start_touch (double when)
 204 {
 205         if (_state == Touch) {
 206                 Glib::Mutex::Lock lm (ControlList::_lock);
 207                 nascent.push_back (new NascentInfo (when));
 208         }
 209
 210         g_atomic_int_set (&_touching, 1);
 211 }
 212
 213 void
 214 AutomationList::stop_touch (bool mark, double when)
 215 {
 216         if (g_atomic_int_get (&_touching) == 0) {
 217                 /* this touch has already been stopped (probably by Automatable::transport_stopped),
 218                    so we've nothing to do.
 219                 */
 220                 return;
 221         }
 222
 223         g_atomic_int_set (&_touching, 0);
 224
 225         if (_state == Touch) {
 226
 227                 assert (!nascent.empty ());
 228
 229                 Glib::Mutex::Lock lm (ControlList::_lock);
 230
 231                 if (mark) {
 232
 233                         nascent.back()->end_time = when;
 234
 235                 } else {
 236
 237                         /* nascent info created in start touch but never used. just get rid of it.
 238                          */
 239
 240                         NascentInfo* ninfo = nascent.back ();
 241                         nascent.erase (nascent.begin());
 242                         delete ninfo;
 243                 }
 244         }
 245 }
 246
 247 void
 248 AutomationList::thaw ()
 249 {
 250         ControlList::thaw();
 251
 252         if (_changed_when_thawed) {
 253                 _changed_when_thawed = false;
 254                 StateChanged(); /* EMIT SIGNAL */
 255         }
 256 }
 257
 258 XMLNode&
 259 AutomationList::get_state ()
 260 {
 261         return state (true);
 262 }
 263
 264 XMLNode&
 265 AutomationList::state (bool full)
 266 {
 267         XMLNode* root = new XMLNode (X_("AutomationList"));
 268         char buf[64];
 269         LocaleGuard lg (X_("POSIX"));
 270
 271         root->add_property ("automation-id", EventTypeMap::instance().to_symbol(_parameter));
 272
 273         root->add_property ("id", _id.to_s());
 274
 275         snprintf (buf, sizeof (buf), "%.12g", _default_value);
 276         root->add_property ("default", buf);
 277         snprintf (buf, sizeof (buf), "%.12g", _min_yval);
 278         root->add_property ("min-yval", buf);
 279         snprintf (buf, sizeof (buf), "%.12g", _max_yval);
 280         root->add_property ("max-yval", buf);
 281         snprintf (buf, sizeof (buf), "%.12g", _max_xval);
 282         root->add_property ("max-xval", buf);
 283
 284         root->add_property ("interpolation-style", enum_2_string (_interpolation));
 285
 286         if (full) {
 287                 /* never serialize state with Write enabled - too dangerous
 288                    for the user's data
 289                 */
 290                 if (_state != Write) {
 291                         root->add_property ("state", auto_state_to_string (_state));
 292                 } else {
 293                         root->add_property ("state", auto_state_to_string (Off));
 294                 }
 295         } else {
 296                 /* never save anything but Off for automation state to a template */
 297                 root->add_property ("state", auto_state_to_string (Off));
 298         }
 299
 300         root->add_property ("style", auto_style_to_string (_style));
 301
 302         if (!_events.empty()) {
 303                 root->add_child_nocopy (serialize_events());
 304         }
 305
 306         return *root;
 307 }
 308
 309 XMLNode&
 310 AutomationList::serialize_events ()
 311 {
 312         XMLNode* node = new XMLNode (X_("events"));
 313         stringstream str;
 314
 315         str.precision(15);  //10 digits is enough digits for 24 hours at 96kHz
 316
 317         for (iterator xx = _events.begin(); xx != _events.end(); ++xx) {
 318                 str << (double) (*xx)->when;
 319                 str << ' ';
 320                 str <<(double) (*xx)->value;
 321                 str << '\n';
 322         }
 323
 324         /* XML is a bit wierd */
 325
 326         XMLNode* content_node = new XMLNode (X_("foo")); /* it gets renamed by libxml when we set content */
 327         content_node->set_content (str.str());
 328
 329         node->add_child_nocopy (*content_node);
 330
 331         return *node;
 332 }
 333
 334 int
 335 AutomationList::deserialize_events (const XMLNode& node)
 336 {
 337         if (node.children().empty()) {
 338                 return -1;
 339         }
 340
 341         XMLNode* content_node = node.children().front();
 342
 343         if (content_node->content().empty()) {
 344                 return -1;
 345         }
 346
 347         ControlList::freeze ();
 348         clear ();
 349
 350         stringstream str (content_node->content());
 351
 352         double x;
 353         double y;
 354         bool ok = true;
 355
 356         while (str) {
 357                 str >> x;
 358                 if (!str) {
 359                         break;
 360                 }
 361                 str >> y;
 362                 if (!str) {
 363                         ok = false;
 364                         break;
 365                 }
 366                 fast_simple_add (x, y);
 367         }
 368
 369         if (!ok) {
 370                 clear ();
 371                 error << _("automation list: cannot load coordinates from XML, all points ignored") << endmsg;
 372         } else {
 373                 mark_dirty ();
 374                 maybe_signal_changed ();
 375         }
 376
 377         thaw ();
 378
 379         return 0;
 380 }
 381
 382 int
 383 AutomationList::set_state (const XMLNode& node, int version)
 384 {
 385         XMLNodeList nlist = node.children();
 386         XMLNode* nsos;
 387         XMLNodeIterator niter;
 388         const XMLProperty* prop;
 389
 390         if (node.name() == X_("events")) {
 391                 /* partial state setting*/
 392                 return deserialize_events (node);
 393         }
 394
 395         if (node.name() == X_("Envelope") || node.name() == X_("FadeOut") || node.name() == X_("FadeIn")) {
 396
 397                 if ((nsos = node.child (X_("AutomationList")))) {
 398                         /* new school in old school clothing */
 399                         return set_state (*nsos, version);
 400                 }
 401
 402                 /* old school */
 403
 404                 const XMLNodeList& elist = node.children();
 405                 XMLNodeConstIterator i;
 406                 XMLProperty* prop;
 407                 pframes_t x;
 408                 double y;
 409
 410                 ControlList::freeze ();
 411                 clear ();
 412
 413                 for (i = elist.begin(); i != elist.end(); ++i) {
 414
 415                         if ((prop = (*i)->property ("x")) == 0) {
 416                                 error << _("automation list: no x-coordinate stored for control point (point ignored)") << endmsg;
 417                                 continue;
 418                         }
 419                         x = atoi (prop->value().c_str());
 420
 421                         if ((prop = (*i)->property ("y")) == 0) {
 422                                 error << _("automation list: no y-coordinate stored for control point (point ignored)") << endmsg;
 423                                 continue;
 424                         }
 425                         y = atof (prop->value().c_str());
 426
 427                         fast_simple_add (x, y);
 428                 }
 429
 430                 thaw ();
 431
 432                 return 0;
 433         }
 434
 435         if (node.name() != X_("AutomationList") ) {
 436                 error << string_compose (_("AutomationList: passed XML node called %1, not \"AutomationList\" - ignored"), node.name()) << endmsg;
 437                 return -1;
 438         }
 439
 440         if ((prop = node.property ("id")) != 0) {
 441                 _id = prop->value ();
 442                 /* update session AL list */
 443                 AutomationListCreated(this);
 444         }
 445
 446         if ((prop = node.property (X_("automation-id"))) != 0){
 447                 _parameter = EventTypeMap::instance().new_parameter(prop->value());
 448         } else {
 449                 warning << "Legacy session: automation list has no automation-id property.";
 450         }
 451
 452         if ((prop = node.property (X_("interpolation-style"))) != 0) {
 453                 _interpolation = (InterpolationStyle)string_2_enum(prop->value(), _interpolation);
 454         } else {
 455                 _interpolation = Linear;
 456         }
 457
 458         if ((prop = node.property (X_("default"))) != 0){
 459                 _default_value = atof (prop->value().c_str());
 460         } else {
 461                 _default_value = 0.0;
 462         }
 463
 464         if ((prop = node.property (X_("style"))) != 0) {
 465                 _style = string_to_auto_style (prop->value());
 466         } else {
 467                 _style = Absolute;
 468         }
 469
 470         if ((prop = node.property (X_("state"))) != 0) {
 471                 _state = string_to_auto_state (prop->value());
 472                 if (_state == Write) {
 473                         _state = Off;
 474                 }
 475         } else {
 476                 _state = Off;
 477         }
 478
 479         if ((prop = node.property (X_("min-yval"))) != 0) {
 480                 _min_yval = atof (prop->value ().c_str());
 481         } else {
 482                 _min_yval = FLT_MIN;
 483         }
 484
 485         if ((prop = node.property (X_("max-yval"))) != 0) {
 486                 _max_yval = atof (prop->value ().c_str());
 487         } else {
 488                 _max_yval = FLT_MAX;
 489         }
 490
 491         if ((prop = node.property (X_("max-xval"))) != 0) {
 492                 _max_xval = atof (prop->value ().c_str());
 493         } else {
 494                 _max_xval = 0; // means "no limit ;
 495         }
 496
 497         bool have_events = false;
 498
 499         for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
 500                 if ((*niter)->name() == X_("events")) {
 501                         deserialize_events (*(*niter));
 502                         have_events = true;
 503                 }
 504         }
 505
 506         if (!have_events) {
 507                 /* there was no Events child node; clear any current events */
 508                 freeze ();
 509                 clear ();
 510                 mark_dirty ();
 511                 maybe_signal_changed ();
 512                 thaw ();
 513         }
 514
 515         return 0;
 516 }
 517