libs/ardour/automation_event.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     $Id$
  19 */
  20
  21 #include <set>
  22 #include <climits>
  23 #include <float.h>
  24 #include <cmath>
  25 #include <algorithm>
  26 #include <sigc++/bind.h>
  27 #include <ardour/automation_event.h>
  28
  29 #include "i18n.h"
  30
  31 using namespace std;
  32 using namespace ARDOUR;
  33 using namespace sigc;
  34 using namespace PBD;
  35
  36 sigc::signal<void,AutomationList *> AutomationList::AutomationListCreated;
  37
  38 #if 0
  39 static void dumpit (const AutomationList& al, string prefix = "")
  40 {
  41         cerr << prefix << &al << endl;
  42         for (AutomationList::const_iterator i = al.const_begin(); i != al.const_end(); ++i) {
  43                 cerr << prefix << '\t' << (*i)->when << ',' << (*i)->value << endl;
  44         }
  45         cerr << "\n";
  46 }
  47 #endif
  48
  49 AutomationList::AutomationList (double defval, bool with_state)
  50 {
  51         _frozen = false;
  52         changed_when_thawed = false;
  53         _state = Off;
  54         _style = Absolute;
  55         _touching = false;
  56         no_state = with_state;
  57         min_yval = FLT_MIN;
  58         max_yval = FLT_MAX;
  59         max_xval = 0; // means "no limit"
  60         default_value = defval;
  61         _dirty = false;
  62         rt_insertion_point = events.end();
  63         lookup_cache.left = -1;
  64         lookup_cache.range.first = events.end();
  65
  66         if (!no_state) {
  67                 save_state (_("initial"));
  68         }
  69
  70         AutomationListCreated(this);
  71 }
  72
  73 AutomationList::AutomationList (const AutomationList& other)
  74 {
  75         _frozen = false;
  76         changed_when_thawed = false;
  77         _style = other._style;
  78         min_yval = other.min_yval;
  79         max_yval = other.max_yval;
  80         max_xval = other.max_xval;
  81         default_value = other.default_value;
  82         _state = other._state;
  83         _touching = other._touching;
  84         _dirty = false;
  85         rt_insertion_point = events.end();
  86         no_state = other.no_state;
  87         lookup_cache.left = -1;
  88         lookup_cache.range.first = events.end();
  89
  90         for (const_iterator i = other.events.begin(); i != other.events.end(); ++i) {
  91                 /* we have to use other point_factory() because
  92                    its virtual and we're in a constructor.
  93                 */
  94                 events.push_back (other.point_factory (**i));
  95         }
  96
  97         mark_dirty ();
  98         AutomationListCreated(this);
  99 }
 100
 101 AutomationList::AutomationList (const AutomationList& other, double start, double end)
 102 {
 103         _frozen = false;
 104         changed_when_thawed = false;
 105         _style = other._style;
 106         min_yval = other.min_yval;
 107         max_yval = other.max_yval;
 108         max_xval = other.max_xval;
 109         default_value = other.default_value;
 110         _state = other._state;
 111         _touching = other._touching;
 112         _dirty = false;
 113         rt_insertion_point = events.end();
 114         no_state = other.no_state;
 115         lookup_cache.left = -1;
 116         lookup_cache.range.first = events.end();
 117
 118         /* now grab the relevant points, and shift them back if necessary */
 119
 120         AutomationList* section = const_cast<AutomationList*>(&other)->copy (start, end);
 121
 122         if (!section->empty()) {
 123                 for (AutomationList::iterator i = section->begin(); i != section->end(); ++i) {
 124                         events.push_back (other.point_factory ((*i)->when, (*i)->value));
 125                 }
 126         }
 127
 128         delete section;
 129
 130         mark_dirty ();
 131         AutomationListCreated(this);
 132 }
 133
 134 AutomationList::~AutomationList()
 135 {
 136         std::set<ControlEvent*> all_events;
 137         AutomationList::State* asp;
 138
 139         for (AutomationEventList::iterator x = events.begin(); x != events.end(); ++x) {
 140                 all_events.insert (*x);
 141         }
 142
 143         for (StateMap::iterator i = states.begin(); i != states.end(); ++i) {
 144
 145                 if ((asp = dynamic_cast<AutomationList::State*> (*i)) != 0) {
 146
 147                         for (AutomationEventList::iterator x = asp->events.begin(); x != asp->events.end(); ++x) {
 148                                 all_events.insert (*x);
 149                         }
 150                 }
 151         }
 152
 153         for (std::set<ControlEvent*>::iterator i = all_events.begin(); i != all_events.end(); ++i) {
 154                 delete (*i);
 155         }
 156 }
 157
 158 bool
 159 AutomationList::operator== (const AutomationList& other)
 160 {
 161         return events == other.events;
 162 }
 163
 164 AutomationList&
 165 AutomationList::operator= (const AutomationList& other)
 166 {
 167         if (this != &other) {
 168
 169                 events.clear ();
 170
 171                 for (const_iterator i = other.events.begin(); i != other.events.end(); ++i) {
 172                         events.push_back (point_factory (**i));
 173                 }
 174
 175                 min_yval = other.min_yval;
 176                 max_yval = other.max_yval;
 177                 max_xval = other.max_xval;
 178                 default_value = other.default_value;
 179
 180                 mark_dirty ();
 181                 maybe_signal_changed ();
 182         }
 183
 184         return *this;
 185 }
 186
 187 void
 188 AutomationList::maybe_signal_changed ()
 189 {
 190         mark_dirty ();
 191
 192         if (_frozen) {
 193                 changed_when_thawed = true;
 194         } else {
 195                 StateChanged (Change (0));
 196         }
 197 }
 198
 199 void
 200 AutomationList::set_automation_state (AutoState s)
 201 {
 202         if (s != _state) {
 203                 _state = s;
 204                 automation_state_changed (); /* EMIT SIGNAL */
 205         }
 206 }
 207
 208 void
 209 AutomationList::set_automation_style (AutoStyle s)
 210 {
 211         if (s != _style) {
 212                 _style = s;
 213                 automation_style_changed (); /* EMIT SIGNAL */
 214         }
 215 }
 216
 217 void
 218 AutomationList::start_touch ()
 219 {
 220         _touching = true;
 221         _new_touch = true;
 222 }
 223
 224 void
 225 AutomationList::stop_touch ()
 226 {
 227         _touching = false;
 228         _new_touch = false;
 229 }
 230
 231 void
 232 AutomationList::clear ()
 233 {
 234         {
 235                 Glib::Mutex::Lock lm (lock);
 236                 events.clear ();
 237                 if (!no_state) {
 238                         save_state (_("cleared"));
 239                 }
 240                 mark_dirty ();
 241         }
 242
 243         maybe_signal_changed ();
 244 }
 245
 246 void
 247 AutomationList::x_scale (double factor)
 248 {
 249         Glib::Mutex::Lock lm (lock);
 250         _x_scale (factor);
 251 }
 252
 253 bool
 254 AutomationList::extend_to (double when)
 255 {
 256         Glib::Mutex::Lock lm (lock);
 257         if (events.empty() || events.back()->when == when) {
 258                 return false;
 259         }
 260         double factor = when / events.back()->when;
 261         _x_scale (factor);
 262         return true;
 263 }
 264
 265 void AutomationList::_x_scale (double factor)
 266 {
 267         for (AutomationList::iterator i = events.begin(); i != events.end(); ++i) {
 268                 (*i)->when = floor ((*i)->when * factor);
 269         }
 270
 271         save_state ("x-scaled");
 272         mark_dirty ();
 273 }
 274
 275 void
 276 AutomationList::reposition_for_rt_add (double when)
 277 {
 278         rt_insertion_point = events.end();
 279 }
 280
 281 #define last_rt_insertion_point rt_insertion_point
 282
 283 void
 284 AutomationList::rt_add (double when, double value)
 285 {
 286         /* this is for automation recording */
 287
 288         if ((_state & Touch) && !_touching) {
 289                 return;
 290         }
 291
 292         // cerr << "RT: alist @ " << this << " add " << value << " @ " << when << endl;
 293
 294         {
 295                 Glib::Mutex::Lock lm (lock);
 296
 297                 iterator where;
 298                 TimeComparator cmp;
 299                 ControlEvent cp (when, 0.0);
 300                 bool done = false;
 301
 302                 if ((last_rt_insertion_point != events.end()) && ((*last_rt_insertion_point)->when < when) ) {
 303
 304                         /* we have a previous insertion point, so we should delete
 305                            everything between it and the position where we are going
 306                            to insert this point.
 307                         */
 308
 309                         iterator after = last_rt_insertion_point;
 310
 311                         if (++after != events.end()) {
 312                                 iterator far = after;
 313
 314                                 while (far != events.end()) {
 315                                         if ((*far)->when > when) {
 316                                                 break;
 317                                         }
 318                                         ++far;
 319                                 }
 320
 321                                 if(_new_touch) {
 322                                         where = far;
 323                                         last_rt_insertion_point = where;
 324
 325                                         if((*where)->when == when) {
 326                                                 (*where)->value = value;
 327                                                 done = true;
 328                                         }
 329                                 } else {
 330                                         where = events.erase (after, far);
 331                                 }
 332
 333                         } else {
 334
 335                                 where = after;
 336
 337                         }
 338
 339                         iterator previous = last_rt_insertion_point;
 340                         --previous;
 341
 342                         if (last_rt_insertion_point != events.begin() && (*last_rt_insertion_point)->value == value && (*previous)->value == value) {
 343                                 (*last_rt_insertion_point)->when = when;
 344                                 done = true;
 345
 346                         }
 347
 348                 } else {
 349
 350                         where = lower_bound (events.begin(), events.end(), &cp, cmp);
 351
 352                         if (where != events.end()) {
 353                                 if ((*where)->when == when) {
 354                                         (*where)->value = value;
 355                                         done = true;
 356                                 }
 357                         }
 358                 }
 359
 360                 if (!done) {
 361                         last_rt_insertion_point = events.insert (where, point_factory (when, value));
 362                 }
 363
 364                 _new_touch = false;
 365                 mark_dirty ();
 366         }
 367
 368         maybe_signal_changed ();
 369 }
 370
 371 #undef last_rt_insertion_point
 372
 373 void
 374 AutomationList::add (double when, double value, bool for_loading)
 375 {
 376         /* this is for graphical editing and loading data from storage */
 377
 378         {
 379                 Glib::Mutex::Lock lm (lock);
 380                 TimeComparator cmp;
 381                 ControlEvent cp (when, 0.0f);
 382                 bool insert = true;
 383                 iterator insertion_point;
 384
 385                 for (insertion_point = lower_bound (events.begin(), events.end(), &cp, cmp); insertion_point != events.end(); ++insertion_point) {
 386
 387                         /* only one point allowed per time point */
 388
 389                         if ((*insertion_point)->when == when) {
 390                                 (*insertion_point)->value = value;
 391                                 insert = false;
 392                                 break;
 393                         }
 394
 395                         if ((*insertion_point)->when >= when) {
 396                                 break;
 397                         }
 398                 }
 399
 400                 if (insert) {
 401
 402                         events.insert (insertion_point, point_factory (when, value));
 403                         reposition_for_rt_add (0);
 404
 405                 }
 406
 407                 mark_dirty ();
 408
 409                 if (!no_state && !for_loading) {
 410                         save_state (_("added event"));
 411                 }
 412         }
 413
 414         if (!for_loading) {
 415                 maybe_signal_changed ();
 416         }
 417 }
 418
 419 void
 420 AutomationList::erase (AutomationList::iterator i)
 421 {
 422         {
 423                 Glib::Mutex::Lock lm (lock);
 424                 events.erase (i);
 425                 reposition_for_rt_add (0);
 426                 if (!no_state) {
 427                         save_state (_("removed event"));
 428                 }
 429                 mark_dirty ();
 430         }
 431         maybe_signal_changed ();
 432 }
 433
 434 void
 435 AutomationList::erase (AutomationList::iterator start, AutomationList::iterator end)
 436 {
 437         {
 438                 Glib::Mutex::Lock lm (lock);
 439                 events.erase (start, end);
 440                 reposition_for_rt_add (0);
 441                 if (!no_state) {
 442                         save_state (_("removed multiple events"));
 443                 }
 444                 mark_dirty ();
 445         }
 446         maybe_signal_changed ();
 447 }
 448
 449 void
 450 AutomationList::reset_range (double start, double endt)
 451 {
 452         bool reset = false;
 453
 454         {
 455         Glib::Mutex::Lock lm (lock);
 456                 TimeComparator cmp;
 457                 ControlEvent cp (start, 0.0f);
 458                 iterator s;
 459                 iterator e;
 460
 461                 if ((s = lower_bound (events.begin(), events.end(), &cp, cmp)) != events.end()) {
 462
 463                         cp.when = endt;
 464                         e = upper_bound (events.begin(), events.end(), &cp, cmp);
 465
 466                         for (iterator i = s; i != e; ++i) {
 467                                 (*i)->value = default_value;
 468                         }
 469
 470                         reset = true;
 471
 472                         if (!no_state) {
 473                                 save_state (_("removed range"));
 474                         }
 475
 476                         mark_dirty ();
 477                 }
 478         }
 479
 480         if (reset) {
 481                 maybe_signal_changed ();
 482         }
 483 }
 484
 485 void
 486 AutomationList::erase_range (double start, double endt)
 487 {
 488         bool erased = false;
 489
 490         {
 491                 Glib::Mutex::Lock lm (lock);
 492                 TimeComparator cmp;
 493                 ControlEvent cp (start, 0.0f);
 494                 iterator s;
 495                 iterator e;
 496
 497                 if ((s = lower_bound (events.begin(), events.end(), &cp, cmp)) != events.end()) {
 498                         cp.when = endt;
 499                         e = upper_bound (events.begin(), events.end(), &cp, cmp);
 500                         events.erase (s, e);
 501                         reposition_for_rt_add (0);
 502                         erased = true;
 503                         if (!no_state) {
 504                                 save_state (_("removed range"));
 505                         }
 506                         mark_dirty ();
 507                 }
 508
 509         }
 510
 511         if (erased) {
 512                 maybe_signal_changed ();
 513         }
 514 }
 515
 516 void
 517 AutomationList::move_range (iterator start, iterator end, double xdelta, double ydelta)
 518 {
 519         /* note: we assume higher level logic is in place to avoid this
 520            reordering the time-order of control events in the list. ie. all
 521            points after end are later than (end)->when.
 522         */
 523
 524         {
 525                 Glib::Mutex::Lock lm (lock);
 526
 527                 while (start != end) {
 528                         (*start)->when += xdelta;
 529                         (*start)->value += ydelta;
 530                         ++start;
 531                 }
 532
 533                 if (!no_state) {
 534                         save_state (_("event range adjusted"));
 535                 }
 536
 537                 mark_dirty ();
 538         }
 539
 540         maybe_signal_changed ();
 541 }
 542
 543 void
 544 AutomationList::modify (iterator iter, double when, double val)
 545 {
 546         /* note: we assume higher level logic is in place to avoid this
 547            reordering the time-order of control events in the list. ie. all
 548            points after *iter are later than when.
 549         */
 550
 551         {
 552                 Glib::Mutex::Lock lm (lock);
 553                 (*iter)->when = when;
 554                 (*iter)->value = val;
 555                 if (!no_state) {
 556                         save_state (_("event adjusted"));
 557                 }
 558
 559                 mark_dirty ();
 560         }
 561
 562         maybe_signal_changed ();
 563 }
 564
 565 std::pair<AutomationList::iterator,AutomationList::iterator>
 566 AutomationList::control_points_adjacent (double xval)
 567 {
 568         Glib::Mutex::Lock lm (lock);
 569         iterator i;
 570         TimeComparator cmp;
 571         ControlEvent cp (xval, 0.0f);
 572         std::pair<iterator,iterator> ret;
 573
 574         ret.first = events.end();
 575         ret.second = events.end();
 576
 577         for (i = lower_bound (events.begin(), events.end(), &cp, cmp); i != events.end(); ++i) {
 578
 579                 if (ret.first == events.end()) {
 580                         if ((*i)->when >= xval) {
 581                                 if (i != events.begin()) {
 582                                         ret.first = i;
 583                                         --ret.first;
 584                                 } else {
 585                                         return ret;
 586                                 }
 587                         }
 588                 }
 589
 590                 if ((*i)->when > xval) {
 591                         ret.second = i;
 592                         break;
 593                 }
 594         }
 595
 596         return ret;
 597 }
 598
 599 void
 600 AutomationList::freeze ()
 601 {
 602         _frozen = true;
 603 }
 604
 605 void
 606 AutomationList::thaw ()
 607 {
 608         _frozen = false;
 609         if (changed_when_thawed) {
 610                  StateChanged(Change(0)); /* EMIT SIGNAL */
 611         }
 612 }
 613
 614 StateManager::State*
 615 AutomationList::state_factory (std::string why) const
 616 {
 617         State* state = new State (why);
 618
 619         for (AutomationEventList::const_iterator x = events.begin(); x != events.end(); ++x) {
 620                 state->events.push_back (point_factory (**x));
 621         }
 622
 623         return state;
 624 }
 625
 626 Change
 627 AutomationList::restore_state (StateManager::State& state)
 628 {
 629         {
 630                 Glib::Mutex::Lock lm (lock);
 631                 State* lstate = dynamic_cast<State*> (&state);
 632
 633                 events.clear ();
 634                 for (AutomationEventList::const_iterator x = lstate->events.begin(); x != lstate->events.end(); ++x) {
 635                         events.push_back (point_factory (**x));
 636                 }
 637         }
 638
 639         return Change (0);
 640 }
 641
 642 UndoAction
 643 AutomationList::get_memento () const
 644 {
 645   return sigc::bind (mem_fun (*(const_cast<AutomationList*> (this)), &StateManager::use_state), _current_state_id);
 646 }
 647
 648 void
 649 AutomationList::set_max_xval (double x)
 650 {
 651         max_xval = x;
 652 }
 653
 654 void
 655 AutomationList::mark_dirty ()
 656 {
 657         lookup_cache.left = -1;
 658         _dirty = true;
 659 }
 660
 661 void
 662 AutomationList::truncate_end (double last_coordinate)
 663 {
 664         {
 665                 Glib::Mutex::Lock lm (lock);
 666                 ControlEvent cp (last_coordinate, 0);
 667                 list<ControlEvent*>::reverse_iterator i;
 668                 double last_val;
 669
 670                 if (events.empty()) {
 671                         fatal << _("programming error:")
 672                               << "AutomationList::truncate_end() called on an empty list"
 673                               << endmsg;
 674                         /*NOTREACHED*/
 675                         return;
 676                 }
 677
 678                 if (last_coordinate == events.back()->when) {
 679                         return;
 680                 }
 681
 682                 if (last_coordinate > events.back()->when) {
 683
 684                         /* extending end:
 685                         */
 686
 687                         iterator foo = events.begin();
 688                         bool lessthantwo;
 689
 690                         if (foo == events.end()) {
 691                                 lessthantwo = true;
 692                         } else if (++foo == events.end()) {
 693                                 lessthantwo = true;
 694                         } else {
 695                                 lessthantwo = false;
 696                         }
 697
 698                         if (lessthantwo) {
 699                                 /* less than 2 points: add a new point */
 700                                 events.push_back (point_factory (last_coordinate, events.back()->value));
 701                         } else {
 702
 703                                 /* more than 2 points: check to see if the last 2 values
 704                                    are equal. if so, just move the position of the
 705                                    last point. otherwise, add a new point.
 706                                 */
 707
 708                                 iterator penultimate = events.end();
 709                                 --penultimate; /* points at last point */
 710                                 --penultimate; /* points at the penultimate point */
 711
 712                                 if (events.back()->value == (*penultimate)->value) {
 713                                         events.back()->when = last_coordinate;
 714                                 } else {
 715                                         events.push_back (point_factory (last_coordinate, events.back()->value));
 716                                 }
 717                         }
 718
 719                 } else {
 720
 721                         /* shortening end */
 722
 723                         last_val = unlocked_eval (last_coordinate);
 724                         last_val = max ((double) min_yval, last_val);
 725                         last_val = min ((double) max_yval, last_val);
 726
 727                         i = events.rbegin();
 728
 729                         /* make i point to the last control point */
 730
 731                         ++i;
 732
 733                         /* now go backwards, removing control points that are
 734                            beyond the new last coordinate.
 735                         */
 736
 737                         uint32_t sz = events.size();
 738
 739                         while (i != events.rend() && sz > 2) {
 740                                 list<ControlEvent*>::reverse_iterator tmp;
 741
 742                                 tmp = i;
 743                                 ++tmp;
 744
 745                                 if ((*i)->when < last_coordinate) {
 746                                         break;
 747                                 }
 748
 749                                 events.erase (i.base());
 750                                 --sz;
 751
 752                                 i = tmp;
 753                         }
 754
 755                         events.back()->when = last_coordinate;
 756                         events.back()->value = last_val;
 757                 }
 758
 759                 reposition_for_rt_add (0);
 760                 mark_dirty();
 761         }
 762
 763         maybe_signal_changed ();
 764 }
 765
 766 void
 767 AutomationList::truncate_start (double overall_length)
 768 {
 769         {
 770                 Glib::Mutex::Lock lm (lock);
 771                 AutomationList::iterator i;
 772                 double first_legal_value;
 773                 double first_legal_coordinate;
 774
 775                 if (events.empty()) {
 776                         fatal << _("programming error:")
 777                               << "AutomationList::truncate_start() called on an empty list"
 778                               << endmsg;
 779                         /*NOTREACHED*/
 780                         return;
 781                 }
 782
 783                 if (overall_length == events.back()->when) {
 784                         /* no change in overall length */
 785                         return;
 786                 }
 787
 788                 if (overall_length > events.back()->when) {
 789
 790                         /* growing at front: duplicate first point. shift all others */
 791
 792                         double shift = overall_length - events.back()->when;
 793                         uint32_t np;
 794
 795                         for (np = 0, i = events.begin(); i != events.end(); ++i, ++np) {
 796                                 (*i)->when += shift;
 797                         }
 798
 799                         if (np < 2) {
 800
 801                                 /* less than 2 points: add a new point */
 802                                 events.push_front (point_factory (0, events.front()->value));
 803
 804                         } else {
 805
 806                                 /* more than 2 points: check to see if the first 2 values
 807                                    are equal. if so, just move the position of the
 808                                    first point. otherwise, add a new point.
 809                                 */
 810
 811                                 iterator second = events.begin();
 812                                 ++second; /* points at the second point */
 813
 814                                 if (events.front()->value == (*second)->value) {
 815                                         /* first segment is flat, just move start point back to zero */
 816                                         events.front()->when = 0;
 817                                 } else {
 818                                         /* leave non-flat segment in place, add a new leading point. */
 819                                         events.push_front (point_factory (0, events.front()->value));
 820                                 }
 821                         }
 822
 823                 } else {
 824
 825                         /* shrinking at front */
 826
 827                         first_legal_coordinate = events.back()->when - overall_length;
 828                         first_legal_value = unlocked_eval (first_legal_coordinate);
 829                         first_legal_value = max (min_yval, first_legal_value);
 830                         first_legal_value = min (max_yval, first_legal_value);
 831
 832                         /* remove all events earlier than the new "front" */
 833
 834                         i = events.begin();
 835
 836                         while (i != events.end() && !events.empty()) {
 837                                 list<ControlEvent*>::iterator tmp;
 838
 839                                 tmp = i;
 840                                 ++tmp;
 841
 842                                 if ((*i)->when > first_legal_coordinate) {
 843                                         break;
 844                                 }
 845
 846                                 events.erase (i);
 847
 848                                 i = tmp;
 849                         }
 850
 851
 852                         /* shift all remaining points left to keep their same
 853                            relative position
 854                         */
 855
 856                         for (i = events.begin(); i != events.end(); ++i) {
 857                                 (*i)->when -= first_legal_coordinate;
 858                         }
 859
 860                         /* add a new point for the interpolated new value */
 861
 862                         events.push_front (point_factory (0, first_legal_value));
 863                 }
 864
 865                 reposition_for_rt_add (0);
 866
 867                 mark_dirty();
 868         }
 869
 870         maybe_signal_changed ();
 871 }
 872
 873 double
 874 AutomationList::unlocked_eval (double x)
 875 {
 876         return shared_eval (x);
 877 }
 878
 879 double
 880 AutomationList::shared_eval (double x)
 881 {
 882         pair<AutomationEventList::iterator,AutomationEventList::iterator> range;
 883         int32_t npoints;
 884         double lpos, upos;
 885         double lval, uval;
 886         double fraction;
 887
 888         npoints = events.size();
 889
 890         switch (npoints) {
 891         case 0:
 892                 return default_value;
 893
 894         case 1:
 895                 if (x >= events.front()->when) {
 896                         return events.front()->value;
 897                 } else {
 898                         // return default_value;
 899                         return events.front()->value;
 900                 }
 901
 902         case 2:
 903                 if (x >= events.back()->when) {
 904                         return events.back()->value;
 905                 } else if (x == events.front()->when) {
 906                         return events.front()->value;
 907                 } else if (x < events.front()->when) {
 908                         // return default_value;
 909                         return events.front()->value;
 910                 }
 911
 912                 lpos = events.front()->when;
 913                 lval = events.front()->value;
 914                 upos = events.back()->when;
 915                 uval = events.back()->value;
 916
 917                 /* linear interpolation betweeen the two points
 918                 */
 919
 920                 fraction = (double) (x - lpos) / (double) (upos - lpos);
 921                 return lval + (fraction * (uval - lval));
 922
 923         default:
 924
 925                 if (x >= events.back()->when) {
 926                         return events.back()->value;
 927                 } else if (x == events.front()->when) {
 928                         return events.front()->value;
 929                 } else if (x < events.front()->when) {
 930                         // return default_value;
 931                         return events.front()->value;
 932                 }
 933
 934                 return multipoint_eval (x);
 935                 break;
 936         }
 937 }
 938
 939 double
 940 AutomationList::multipoint_eval (double x)
 941 {
 942         pair<AutomationList::iterator,AutomationList::iterator> range;
 943         double upos, lpos;
 944         double uval, lval;
 945         double fraction;
 946
 947         /* only do the range lookup if x is in a different range than last time
 948            this was called (or if the lookup cache has been marked "dirty" (left<0)
 949         */
 950
 951         if ((lookup_cache.left < 0) ||
 952             ((lookup_cache.left > x) ||
 953              (lookup_cache.range.first == events.end()) ||
 954              ((*lookup_cache.range.second)->when < x))) {
 955
 956                 ControlEvent cp (x, 0);
 957                 TimeComparator cmp;
 958
 959                 lookup_cache.range = equal_range (events.begin(), events.end(), &cp, cmp);
 960         }
 961
 962         range = lookup_cache.range;
 963
 964         if (range.first == range.second) {
 965
 966                 /* x does not exist within the list as a control point */
 967
 968                 lookup_cache.left = x;
 969
 970                 if (range.first != events.begin()) {
 971                         --range.first;
 972                         lpos = (*range.first)->when;
 973                         lval = (*range.first)->value;
 974                 }  else {
 975                         /* we're before the first point */
 976                         // return default_value;
 977                         return events.front()->value;
 978                 }
 979
 980                 if (range.second == events.end()) {
 981                         /* we're after the last point */
 982                         return events.back()->value;
 983                 }
 984
 985                 upos = (*range.second)->when;
 986                 uval = (*range.second)->value;
 987
 988                 /* linear interpolation betweeen the two points
 989                    on either side of x
 990                 */
 991
 992                 fraction = (double) (x - lpos) / (double) (upos - lpos);
 993                 return lval + (fraction * (uval - lval));
 994
 995         }
 996
 997         /* x is a control point in the data */
 998         lookup_cache.left = -1;
 999         return (*range.first)->value;
1000 }
1001
1002 AutomationList*
1003 AutomationList::cut (iterator start, iterator end)
1004 {
1005         AutomationList* nal = new AutomationList (default_value);
1006
1007         {
1008                 Glib::Mutex::Lock lm (lock);
1009
1010                 for (iterator x = start; x != end; ) {
1011                         iterator tmp;
1012
1013                         tmp = x;
1014                         ++tmp;
1015
1016                         nal->events.push_back (point_factory (**x));
1017                         events.erase (x);
1018
1019                         reposition_for_rt_add (0);
1020
1021                         x = tmp;
1022                 }
1023
1024                 mark_dirty ();
1025         }
1026
1027         maybe_signal_changed ();
1028
1029         return nal;
1030 }
1031
1032 AutomationList*
1033 AutomationList::cut_copy_clear (double start, double end, int op)
1034 {
1035         AutomationList* nal = new AutomationList (default_value);
1036         iterator s, e;
1037         ControlEvent cp (start, 0.0);
1038         TimeComparator cmp;
1039         bool changed = false;
1040
1041         {
1042                 Glib::Mutex::Lock lm (lock);
1043
1044                 if ((s = lower_bound (events.begin(), events.end(), &cp, cmp)) == events.end()) {
1045                         return nal;
1046                 }
1047
1048                 cp.when = end;
1049                 e = upper_bound (events.begin(), events.end(), &cp, cmp);
1050
1051                 if (op != 2 && (*s)->when != start) {
1052                         nal->events.push_back (point_factory (0, unlocked_eval (start)));
1053                 }
1054
1055                 for (iterator x = s; x != e; ) {
1056                         iterator tmp;
1057
1058                         tmp = x;
1059                         ++tmp;
1060
1061                         changed = true;
1062
1063                         /* adjust new points to be relative to start, which
1064                            has been set to zero.
1065                         */
1066
1067                         if (op != 2) {
1068                                 nal->events.push_back (point_factory ((*x)->when - start, (*x)->value));
1069                         }
1070
1071                         if (op != 1) {
1072                                 events.erase (x);
1073                         }
1074
1075                         x = tmp;
1076                 }
1077
1078                 if (op != 2 && nal->events.back()->when != end - start) {
1079                         nal->events.push_back (point_factory (end - start, unlocked_eval (end)));
1080                 }
1081
1082                 if (changed) {
1083                         reposition_for_rt_add (0);
1084                         if (!no_state) {
1085                                 save_state (_("cut/copy/clear"));
1086                         }
1087                 }
1088
1089                 mark_dirty ();
1090         }
1091
1092         maybe_signal_changed ();
1093
1094         return nal;
1095
1096 }
1097
1098 AutomationList*
1099 AutomationList::copy (iterator start, iterator end)
1100 {
1101         AutomationList* nal = new AutomationList (default_value);
1102
1103         {
1104                 Glib::Mutex::Lock lm (lock);
1105
1106                 for (iterator x = start; x != end; ) {
1107                         iterator tmp;
1108
1109                         tmp = x;
1110                         ++tmp;
1111
1112                         nal->events.push_back (point_factory (**x));
1113
1114                         x = tmp;
1115                 }
1116
1117                 if (!no_state) {
1118                         save_state (_("copy"));
1119                 }
1120         }
1121
1122         return nal;
1123 }
1124
1125 AutomationList*
1126 AutomationList::cut (double start, double end)
1127 {
1128         return cut_copy_clear (start, end, 0);
1129 }
1130
1131 AutomationList*
1132 AutomationList::copy (double start, double end)
1133 {
1134         return cut_copy_clear (start, end, 1);
1135 }
1136
1137 void
1138 AutomationList::clear (double start, double end)
1139 {
1140         (void) cut_copy_clear (start, end, 2);
1141 }
1142
1143 bool
1144 AutomationList::paste (AutomationList& alist, double pos, float times)
1145 {
1146         if (alist.events.empty()) {
1147                 return false;
1148         }
1149
1150         {
1151                 Glib::Mutex::Lock lm (lock);
1152                 iterator where;
1153                 iterator prev;
1154                 double end = 0;
1155                 ControlEvent cp (pos, 0.0);
1156                 TimeComparator cmp;
1157
1158                 where = upper_bound (events.begin(), events.end(), &cp, cmp);
1159
1160                 for (iterator i = alist.begin();i != alist.end(); ++i) {
1161                         events.insert (where, point_factory( (*i)->when+pos,( *i)->value));
1162                         end = (*i)->when + pos;
1163                 }
1164
1165
1166                 /* move all  points after the insertion along the timeline by
1167                    the correct amount.
1168                 */
1169
1170                 while (where != events.end()) {
1171                         iterator tmp;
1172                         if ((*where)->when <= end) {
1173                                 tmp = where;
1174                                 ++tmp;
1175                                 events.erase(where);
1176                                 where = tmp;
1177
1178                         } else {
1179                                 break;
1180                         }
1181                 }
1182
1183                 reposition_for_rt_add (0);
1184
1185                 if (!no_state) {
1186                         save_state (_("paste"));
1187                 }
1188
1189                 mark_dirty ();
1190         }
1191
1192         maybe_signal_changed ();
1193         return true;
1194 }
1195
1196 ControlEvent*
1197 AutomationList::point_factory (double when, double val) const
1198 {
1199         return new ControlEvent (when, val);
1200 }
1201
1202 ControlEvent*
1203 AutomationList::point_factory (const ControlEvent& other) const
1204 {
1205         return new ControlEvent (other);
1206 }
1207
1208 void
1209 AutomationList::store_state (XMLNode& node) const
1210 {
1211         LocaleGuard lg (X_("POSIX"));
1212
1213         for (const_iterator i = const_begin(); i != const_end(); ++i) {
1214                 char buf[64];
1215
1216                 XMLNode *pointnode = new XMLNode ("point");
1217
1218                 snprintf (buf, sizeof (buf), "%" PRIu32, (jack_nframes_t) floor ((*i)->when));
1219                 pointnode->add_property ("x", buf);
1220                 snprintf (buf, sizeof (buf), "%.12g", (*i)->value);
1221                 pointnode->add_property ("y", buf);
1222
1223                 node.add_child_nocopy (*pointnode);
1224         }
1225 }
1226
1227 void
1228 AutomationList::load_state (const XMLNode& node)
1229 {
1230         const XMLNodeList& elist = node.children();
1231         XMLNodeConstIterator i;
1232         XMLProperty* prop;
1233         jack_nframes_t x;
1234         double y;
1235
1236         clear ();
1237
1238         for (i = elist.begin(); i != elist.end(); ++i) {
1239
1240                 if ((prop = (*i)->property ("x")) == 0) {
1241                         error << _("automation list: no x-coordinate stored for control point (point ignored)") << endmsg;
1242                         continue;
1243                 }
1244                 x = atoi (prop->value().c_str());
1245
1246                 if ((prop = (*i)->property ("y")) == 0) {
1247                         error << _("automation list: no y-coordinate stored for control point (point ignored)") << endmsg;
1248                         continue;
1249                 }
1250                 y = atof (prop->value().c_str());
1251
1252                 add (x, y);
1253         }
1254 }
1255
1256 XMLNode &AutomationList::get_state ()
1257 {
1258     XMLNode *node = new XMLNode("AutomationList");
1259     store_state(*node);
1260     return *node;
1261 }
1262
1263 int AutomationList::set_state(const XMLNode &s)
1264 {
1265     load_state(s);
1266     return 0;
1267 }
1268