libs/evoral/src/ControlList.cpp

   1 /* This file is part of Evoral.
   2  * Copyright (C) 2008 Dave Robillard <http://drobilla.net>
   3  * Copyright (C) 2000-2008 Paul Davis
   4  *
   5  * Evoral is free software; you can redistribute it and/or modify it under the
   6  * terms of the GNU General Public License as published by the Free Software
   7  * Foundation; either version 2 of the License, or (at your option) any later
   8  * version.
   9  *
  10  * Evoral is distributed in the hope that it will be useful, but WITHOUT ANY
  11  * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  12  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  17  */
  18
  19 #include <cmath>
  20 #include <cassert>
  21 #include <utility>
  22 #include <iostream>
  23 #include "evoral/ControlList.hpp"
  24
  25 using namespace std;
  26
  27 namespace Evoral {
  28
  29
  30 inline bool event_time_less_than (ControlEvent* a, ControlEvent* b)
  31 {
  32         return a->when < b->when;
  33 }
  34
  35
  36 ControlList::ControlList (const Parameter& id)
  37         : _parameter(id)
  38         , _interpolation(Linear)
  39         , _curve(new Curve(*this))
  40 {
  41         _frozen = 0;
  42         _changed_when_thawed = false;
  43         _min_yval = id.min();
  44         _max_yval = id.max();
  45         _max_xval = 0; // means "no limit"
  46         _rt_insertion_point = _events.end();
  47         _lookup_cache.left = -1;
  48         _lookup_cache.range.first = _events.end();
  49         _search_cache.left = -1;
  50         _search_cache.range.first = _events.end();
  51         _sort_pending = false;
  52 }
  53
  54 ControlList::ControlList (const ControlList& other)
  55         : _parameter(other._parameter)
  56         , _interpolation(Linear)
  57         , _curve(new Curve(*this))
  58 {
  59         _frozen = 0;
  60         _changed_when_thawed = false;
  61         _min_yval = other._min_yval;
  62         _max_yval = other._max_yval;
  63         _max_xval = other._max_xval;
  64         _default_value = other._default_value;
  65         _rt_insertion_point = _events.end();
  66         _lookup_cache.range.first = _events.end();
  67         _search_cache.range.first = _events.end();
  68         _sort_pending = false;
  69
  70         for (const_iterator i = other._events.begin(); i != other._events.end(); ++i) {
  71                 _events.push_back (new ControlEvent (**i));
  72         }
  73
  74         mark_dirty ();
  75 }
  76
  77 ControlList::ControlList (const ControlList& other, double start, double end)
  78         : _parameter(other._parameter)
  79         , _interpolation(Linear)
  80         , _curve(new Curve(*this))
  81 {
  82         _frozen = 0;
  83         _changed_when_thawed = false;
  84         _min_yval = other._min_yval;
  85         _max_yval = other._max_yval;
  86         _max_xval = other._max_xval;
  87         _default_value = other._default_value;
  88         _rt_insertion_point = _events.end();
  89         _lookup_cache.range.first = _events.end();
  90         _search_cache.range.first = _events.end();
  91         _sort_pending = false;
  92
  93         /* now grab the relevant points, and shift them back if necessary */
  94
  95         boost::shared_ptr<ControlList> section = const_cast<ControlList*>(&other)->copy (start, end);
  96
  97         if (!section->empty()) {
  98                 for (iterator i = section->begin(); i != section->end(); ++i) {
  99                         _events.push_back (new ControlEvent ((*i)->when, (*i)->value));
 100                 }
 101         }
 102
 103         mark_dirty ();
 104 }
 105
 106 ControlList::~ControlList()
 107 {
 108         for (EventList::iterator x = _events.begin(); x != _events.end(); ++x) {
 109                 delete (*x);
 110         }
 111 }
 112
 113 boost::shared_ptr<ControlList>
 114 ControlList::create(Parameter id)
 115 {
 116         return boost::shared_ptr<ControlList>(new ControlList(id));
 117 }
 118
 119 bool
 120 ControlList::operator== (const ControlList& other)
 121 {
 122         return _events == other._events;
 123 }
 124
 125 ControlList&
 126 ControlList::operator= (const ControlList& other)
 127 {
 128         if (this != &other) {
 129
 130                 _events.clear ();
 131
 132                 for (const_iterator i = other._events.begin(); i != other._events.end(); ++i) {
 133                         _events.push_back (new ControlEvent (**i));
 134                 }
 135
 136                 _min_yval = other._min_yval;
 137                 _max_yval = other._max_yval;
 138                 _max_xval = other._max_xval;
 139                 _default_value = other._default_value;
 140
 141                 mark_dirty ();
 142                 maybe_signal_changed ();
 143         }
 144
 145         return *this;
 146 }
 147
 148 void
 149 ControlList::maybe_signal_changed ()
 150 {
 151         mark_dirty ();
 152
 153         if (_frozen)
 154                 _changed_when_thawed = true;
 155 }
 156
 157 void
 158 ControlList::clear ()
 159 {
 160         {
 161                 Glib::Mutex::Lock lm (_lock);
 162                 _events.clear ();
 163                 mark_dirty ();
 164         }
 165
 166         maybe_signal_changed ();
 167 }
 168
 169 void
 170 ControlList::x_scale (double factor)
 171 {
 172         Glib::Mutex::Lock lm (_lock);
 173         _x_scale (factor);
 174 }
 175
 176 bool
 177 ControlList::extend_to (double when)
 178 {
 179         Glib::Mutex::Lock lm (_lock);
 180         if (_events.empty() || _events.back()->when == when) {
 181                 return false;
 182         }
 183         double factor = when / _events.back()->when;
 184         _x_scale (factor);
 185         return true;
 186 }
 187
 188 void ControlList::_x_scale (double factor)
 189 {
 190         for (iterator i = _events.begin(); i != _events.end(); ++i) {
 191                 (*i)->when = floor ((*i)->when * factor);
 192         }
 193
 194         mark_dirty ();
 195 }
 196
 197 void
 198 ControlList::reposition_for_rt_add (double when)
 199 {
 200         _rt_insertion_point = _events.end();
 201 }
 202
 203 void
 204 ControlList::rt_add (double when, double value)
 205 {
 206         //cerr << "RT: alist " << this << " add " << value << " @ " << when << endl;
 207
 208         {
 209                 Glib::Mutex::Lock lm (_lock);
 210
 211                 iterator where;
 212                 ControlEvent cp (when, 0.0);
 213                 bool done = false;
 214
 215                 if ((_rt_insertion_point != _events.end()) && ((*_rt_insertion_point)->when < when) ) {
 216
 217                         /* we have a previous insertion point, so we should delete
 218                            everything between it and the position where we are going
 219                            to insert this point.
 220                         */
 221
 222                         iterator after = _rt_insertion_point;
 223
 224                         if (++after != _events.end()) {
 225                                 iterator far = after;
 226
 227                                 while (far != _events.end()) {
 228                                         if ((*far)->when > when) {
 229                                                 break;
 230                                         }
 231                                         ++far;
 232                                 }
 233
 234                                 if (_new_value) {
 235                                         where = far;
 236                                         _rt_insertion_point = where;
 237
 238                                         if ((*where)->when == when) {
 239                                                 (*where)->value = value;
 240                                                 done = true;
 241                                         }
 242                                 } else {
 243                                         where = _events.erase (after, far);
 244                                 }
 245
 246                         } else {
 247
 248                                 where = after;
 249
 250                         }
 251
 252                         iterator previous = _rt_insertion_point;
 253                         --previous;
 254
 255                         if (_rt_insertion_point != _events.begin() && (*_rt_insertion_point)->value == value && (*previous)->value == value) {
 256                                 (*_rt_insertion_point)->when = when;
 257                                 done = true;
 258
 259                         }
 260
 261                 } else {
 262
 263                         where = lower_bound (_events.begin(), _events.end(), &cp, time_comparator);
 264
 265                         if (where != _events.end()) {
 266                                 if ((*where)->when == when) {
 267                                         (*where)->value = value;
 268                                         done = true;
 269                                 }
 270                         }
 271                 }
 272
 273                 if (!done) {
 274                         _rt_insertion_point = _events.insert (where, new ControlEvent (when, value));
 275                 }
 276
 277                 _new_value = false;
 278                 mark_dirty ();
 279         }
 280
 281         maybe_signal_changed ();
 282 }
 283
 284 void
 285 ControlList::fast_simple_add (double when, double value)
 286 {
 287         /* to be used only for loading pre-sorted data from saved state */
 288         _events.insert (_events.end(), new ControlEvent (when, value));
 289         assert(_events.back());
 290 }
 291
 292 void
 293 ControlList::add (double when, double value)
 294 {
 295         /* this is for graphical editing */
 296
 297         {
 298                 Glib::Mutex::Lock lm (_lock);
 299                 ControlEvent cp (when, 0.0f);
 300                 bool insert = true;
 301                 iterator insertion_point;
 302
 303                 for (insertion_point = lower_bound (_events.begin(), _events.end(), &cp, time_comparator); insertion_point != _events.end(); ++insertion_point) {
 304
 305                         /* only one point allowed per time point */
 306
 307                         if ((*insertion_point)->when == when) {
 308                                 (*insertion_point)->value = value;
 309                                 insert = false;
 310                                 break;
 311                         }
 312
 313                         if ((*insertion_point)->when >= when) {
 314                                 break;
 315                         }
 316                 }
 317
 318                 if (insert) {
 319
 320                         _events.insert (insertion_point, new ControlEvent (when, value));
 321                         reposition_for_rt_add (0);
 322
 323                 }
 324
 325                 mark_dirty ();
 326         }
 327
 328         maybe_signal_changed ();
 329 }
 330
 331 void
 332 ControlList::erase (iterator i)
 333 {
 334         {
 335                 Glib::Mutex::Lock lm (_lock);
 336                 _events.erase (i);
 337                 reposition_for_rt_add (0);
 338                 mark_dirty ();
 339         }
 340         maybe_signal_changed ();
 341 }
 342
 343 void
 344 ControlList::erase (iterator start, iterator end)
 345 {
 346         {
 347                 Glib::Mutex::Lock lm (_lock);
 348                 _events.erase (start, end);
 349                 reposition_for_rt_add (0);
 350                 mark_dirty ();
 351         }
 352         maybe_signal_changed ();
 353 }
 354
 355 void
 356 ControlList::reset_range (double start, double endt)
 357 {
 358         bool reset = false;
 359
 360         {
 361         Glib::Mutex::Lock lm (_lock);
 362                 ControlEvent cp (start, 0.0f);
 363                 iterator s;
 364                 iterator e;
 365
 366                 if ((s = lower_bound (_events.begin(), _events.end(), &cp, time_comparator)) != _events.end()) {
 367
 368                         cp.when = endt;
 369                         e = upper_bound (_events.begin(), _events.end(), &cp, time_comparator);
 370
 371                         for (iterator i = s; i != e; ++i) {
 372                                 (*i)->value = _default_value;
 373                         }
 374
 375                         reset = true;
 376
 377                         mark_dirty ();
 378                 }
 379         }
 380
 381         if (reset) {
 382                 maybe_signal_changed ();
 383         }
 384 }
 385
 386 void
 387 ControlList::erase_range (double start, double endt)
 388 {
 389         bool erased = false;
 390
 391         {
 392                 Glib::Mutex::Lock lm (_lock);
 393                 erased = erase_range_internal (start, endt, _events);
 394
 395                 if (erased) {
 396                         reposition_for_rt_add (0);
 397                         mark_dirty ();
 398                 }
 399
 400         }
 401
 402         if (erased) {
 403                 maybe_signal_changed ();
 404         }
 405 }
 406
 407 bool
 408 ControlList::erase_range_internal (double start, double endt, EventList & events)
 409 {
 410         bool erased = false;
 411         ControlEvent cp (start, 0.0f);
 412         iterator s;
 413         iterator e;
 414
 415         if ((s = lower_bound (events.begin(), events.end(), &cp, time_comparator)) != events.end()) {
 416                 cp.when = endt;
 417                 e = upper_bound (events.begin(), events.end(), &cp, time_comparator);
 418                 events.erase (s, e);
 419                 erased = true;
 420         }
 421
 422         return erased;
 423 }
 424
 425 void
 426 ControlList::slide (iterator before, double distance)
 427 {
 428         {
 429                 Glib::Mutex::Lock lm (_lock);
 430
 431                 if (before == _events.end()) {
 432                         return;
 433                 }
 434
 435                 while (before != _events.end()) {
 436                         (*before)->when += distance;
 437                         ++before;
 438                 }
 439         }
 440
 441         maybe_signal_changed ();
 442 }
 443
 444 void
 445 ControlList::modify (iterator iter, double when, double val)
 446 {
 447         /* note: we assume higher level logic is in place to avoid this
 448            reordering the time-order of control events in the list. ie. all
 449            points after *iter are later than when.
 450         */
 451
 452         {
 453                 Glib::Mutex::Lock lm (_lock);
 454
 455                 (*iter)->when = when;
 456                 (*iter)->value = val;
 457
 458                 if (isnan (val)) {
 459                         abort ();
 460                 }
 461
 462                 if (!_frozen) {
 463                         _events.sort (event_time_less_than);
 464                 } else {
 465                         _sort_pending = true;
 466                 }
 467
 468                 mark_dirty ();
 469         }
 470
 471         maybe_signal_changed ();
 472 }
 473
 474 std::pair<ControlList::iterator,ControlList::iterator>
 475 ControlList::control_points_adjacent (double xval)
 476 {
 477         Glib::Mutex::Lock lm (_lock);
 478         iterator i;
 479         ControlEvent cp (xval, 0.0f);
 480         std::pair<iterator,iterator> ret;
 481
 482         ret.first = _events.end();
 483         ret.second = _events.end();
 484
 485         for (i = lower_bound (_events.begin(), _events.end(), &cp, time_comparator); i != _events.end(); ++i) {
 486
 487                 if (ret.first == _events.end()) {
 488                         if ((*i)->when >= xval) {
 489                                 if (i != _events.begin()) {
 490                                         ret.first = i;
 491                                         --ret.first;
 492                                 } else {
 493                                         return ret;
 494                                 }
 495                         }
 496                 }
 497
 498                 if ((*i)->when > xval) {
 499                         ret.second = i;
 500                         break;
 501                 }
 502         }
 503
 504         return ret;
 505 }
 506
 507 void
 508 ControlList::set_max_xval (double x)
 509 {
 510         _max_xval = x;
 511 }
 512
 513 void
 514 ControlList::freeze ()
 515 {
 516         _frozen++;
 517 }
 518
 519 void
 520 ControlList::thaw ()
 521 {
 522         assert(_frozen > 0);
 523
 524         if (--_frozen > 0) {
 525                 return;
 526         }
 527
 528         {
 529                 Glib::Mutex::Lock lm (_lock);
 530
 531                 if (_sort_pending) {
 532                         _events.sort (event_time_less_than);
 533                         _sort_pending = false;
 534                 }
 535         }
 536 }
 537
 538 void
 539 ControlList::mark_dirty () const
 540 {
 541         _lookup_cache.left = -1;
 542         _search_cache.left = -1;
 543         if (_curve)
 544                 _curve->mark_dirty();
 545 }
 546
 547 void
 548 ControlList::truncate_end (double last_coordinate)
 549 {
 550         {
 551                 Glib::Mutex::Lock lm (_lock);
 552                 ControlEvent cp (last_coordinate, 0);
 553                 ControlList::reverse_iterator i;
 554                 double last_val;
 555
 556                 if (_events.empty()) {
 557                         return;
 558                 }
 559
 560                 if (last_coordinate == _events.back()->when) {
 561                         return;
 562                 }
 563
 564                 if (last_coordinate > _events.back()->when) {
 565
 566                         /* extending end:
 567                         */
 568
 569                         iterator foo = _events.begin();
 570                         bool lessthantwo;
 571
 572                         if (foo == _events.end()) {
 573                                 lessthantwo = true;
 574                         } else if (++foo == _events.end()) {
 575                                 lessthantwo = true;
 576                         } else {
 577                                 lessthantwo = false;
 578                         }
 579
 580                         if (lessthantwo) {
 581                                 /* less than 2 points: add a new point */
 582                                 _events.push_back (new ControlEvent (last_coordinate, _events.back()->value));
 583                         } else {
 584
 585                                 /* more than 2 points: check to see if the last 2 values
 586                                    are equal. if so, just move the position of the
 587                                    last point. otherwise, add a new point.
 588                                 */
 589
 590                                 iterator penultimate = _events.end();
 591                                 --penultimate; /* points at last point */
 592                                 --penultimate; /* points at the penultimate point */
 593
 594                                 if (_events.back()->value == (*penultimate)->value) {
 595                                         _events.back()->when = last_coordinate;
 596                                 } else {
 597                                         _events.push_back (new ControlEvent (last_coordinate, _events.back()->value));
 598                                 }
 599                         }
 600
 601                 } else {
 602
 603                         /* shortening end */
 604
 605                         last_val = unlocked_eval (last_coordinate);
 606                         last_val = max ((double) _min_yval, last_val);
 607                         last_val = min ((double) _max_yval, last_val);
 608
 609                         i = _events.rbegin();
 610
 611                         /* make i point to the last control point */
 612
 613                         ++i;
 614
 615                         /* now go backwards, removing control points that are
 616                            beyond the new last coordinate.
 617                         */
 618
 619                         // FIXME: SLOW! (size() == O(n))
 620
 621                         uint32_t sz = _events.size();
 622
 623                         while (i != _events.rend() && sz > 2) {
 624                                 ControlList::reverse_iterator tmp;
 625
 626                                 tmp = i;
 627                                 ++tmp;
 628
 629                                 if ((*i)->when < last_coordinate) {
 630                                         break;
 631                                 }
 632
 633                                 _events.erase (i.base());
 634                                 --sz;
 635
 636                                 i = tmp;
 637                         }
 638
 639                         _events.back()->when = last_coordinate;
 640                         _events.back()->value = last_val;
 641                 }
 642
 643                 reposition_for_rt_add (0);
 644                 mark_dirty();
 645         }
 646
 647         maybe_signal_changed ();
 648 }
 649
 650 void
 651 ControlList::truncate_start (double overall_length)
 652 {
 653         {
 654                 Glib::Mutex::Lock lm (_lock);
 655                 iterator i;
 656                 double first_legal_value;
 657                 double first_legal_coordinate;
 658
 659                 assert(!_events.empty());
 660
 661                 if (overall_length == _events.back()->when) {
 662                         /* no change in overall length */
 663                         return;
 664                 }
 665
 666                 if (overall_length > _events.back()->when) {
 667
 668                         /* growing at front: duplicate first point. shift all others */
 669
 670                         double shift = overall_length - _events.back()->when;
 671                         uint32_t np;
 672
 673                         for (np = 0, i = _events.begin(); i != _events.end(); ++i, ++np) {
 674                                 (*i)->when += shift;
 675                         }
 676
 677                         if (np < 2) {
 678
 679                                 /* less than 2 points: add a new point */
 680                                 _events.push_front (new ControlEvent (0, _events.front()->value));
 681
 682                         } else {
 683
 684                                 /* more than 2 points: check to see if the first 2 values
 685                                    are equal. if so, just move the position of the
 686                                    first point. otherwise, add a new point.
 687                                 */
 688
 689                                 iterator second = _events.begin();
 690                                 ++second; /* points at the second point */
 691
 692                                 if (_events.front()->value == (*second)->value) {
 693                                         /* first segment is flat, just move start point back to zero */
 694                                         _events.front()->when = 0;
 695                                 } else {
 696                                         /* leave non-flat segment in place, add a new leading point. */
 697                                         _events.push_front (new ControlEvent (0, _events.front()->value));
 698                                 }
 699                         }
 700
 701                 } else {
 702
 703                         /* shrinking at front */
 704
 705                         first_legal_coordinate = _events.back()->when - overall_length;
 706                         first_legal_value = unlocked_eval (first_legal_coordinate);
 707                         first_legal_value = max (_min_yval, first_legal_value);
 708                         first_legal_value = min (_max_yval, first_legal_value);
 709
 710                         /* remove all events earlier than the new "front" */
 711
 712                         i = _events.begin();
 713
 714                         while (i != _events.end() && !_events.empty()) {
 715                                 ControlList::iterator tmp;
 716
 717                                 tmp = i;
 718                                 ++tmp;
 719
 720                                 if ((*i)->when > first_legal_coordinate) {
 721                                         break;
 722                                 }
 723
 724                                 _events.erase (i);
 725
 726                                 i = tmp;
 727                         }
 728
 729
 730                         /* shift all remaining points left to keep their same
 731                            relative position
 732                         */
 733
 734                         for (i = _events.begin(); i != _events.end(); ++i) {
 735                                 (*i)->when -= first_legal_coordinate;
 736                         }
 737
 738                         /* add a new point for the interpolated new value */
 739
 740                         _events.push_front (new ControlEvent (0, first_legal_value));
 741                 }
 742
 743                 reposition_for_rt_add (0);
 744
 745                 mark_dirty();
 746         }
 747
 748         maybe_signal_changed ();
 749 }
 750
 751 double
 752 ControlList::unlocked_eval (double x) const
 753 {
 754         pair<EventList::iterator,EventList::iterator> range;
 755         int32_t npoints;
 756         double lpos, upos;
 757         double lval, uval;
 758         double fraction;
 759
 760         const_iterator length_check_iter = _events.begin();
 761         for (npoints = 0; npoints < 4; ++npoints, ++length_check_iter)
 762                 if (length_check_iter == _events.end())
 763                         break;
 764
 765         switch (npoints) {
 766         case 0:
 767                 return _default_value;
 768
 769         case 1:
 770                 if (x >= _events.front()->when) {
 771                         return _events.front()->value;
 772                 } else {
 773                         // hansfbaier: v--------- Why commented ???
 774                         // return _default_value;
 775                         return _events.front()->value;
 776                 }
 777
 778         case 2:
 779                 if (x >= _events.back()->when) {
 780                         return _events.back()->value;
 781                 } else if (x == _events.front()->when) {
 782                         return _events.front()->value;
 783                 } else if (x < _events.front()->when) {
 784                         // hansfbaier: v--------- Why commented ???
 785                         // return _default_value;
 786                         return _events.front()->value;
 787                 }
 788
 789                 lpos = _events.front()->when;
 790                 lval = _events.front()->value;
 791                 upos = _events.back()->when;
 792                 uval = _events.back()->value;
 793
 794                 if (_interpolation == Discrete) {
 795                         return lval;
 796                 }
 797
 798                 /* linear interpolation betweeen the two points
 799                 */
 800
 801                 fraction = (double) (x - lpos) / (double) (upos - lpos);
 802                 return lval + (fraction * (uval - lval));
 803
 804         default:
 805
 806                 if (x >= _events.back()->when) {
 807                         return _events.back()->value;
 808                 } else if (x == _events.front()->when) {
 809                         return _events.front()->value;
 810                 } else if (x < _events.front()->when) {
 811                         // hansfbaier: v--------- Why commented ???
 812                         // return _default_value;
 813                         return _events.front()->value;
 814                 }
 815
 816                 return multipoint_eval (x);
 817                 break;
 818         }
 819
 820         /*NOTREACHED*/ /* stupid gcc */
 821         return 0.0;
 822 }
 823
 824 double
 825 ControlList::multipoint_eval (double x) const
 826 {
 827         double upos, lpos;
 828         double uval, lval;
 829         double fraction;
 830
 831         /* "Stepped" lookup (no interpolation) */
 832         /* FIXME: no cache.  significant? */
 833         if (_interpolation == Discrete) {
 834                 const ControlEvent cp (x, 0);
 835                 EventList::const_iterator i = lower_bound (_events.begin(), _events.end(), &cp, time_comparator);
 836
 837                 // shouldn't have made it to multipoint_eval
 838                 assert(i != _events.end());
 839
 840                 if (i == _events.begin() || (*i)->when == x)
 841                         return (*i)->value;
 842                 else
 843                         return (*(--i))->value;
 844         }
 845
 846         /* Only do the range lookup if x is in a different range than last time
 847          * this was called (or if the lookup cache has been marked "dirty" (left<0) */
 848         if ((_lookup_cache.left < 0) ||
 849             ((_lookup_cache.left > x) ||
 850              (_lookup_cache.range.first == _events.end()) ||
 851              ((*_lookup_cache.range.second)->when < x))) {
 852
 853                 const ControlEvent cp (x, 0);
 854
 855                 _lookup_cache.range = equal_range (_events.begin(), _events.end(), &cp, time_comparator);
 856         }
 857
 858         pair<const_iterator,const_iterator> range = _lookup_cache.range;
 859
 860         if (range.first == range.second) {
 861
 862                 /* x does not exist within the list as a control point */
 863
 864                 _lookup_cache.left = x;
 865
 866                 if (range.first != _events.begin()) {
 867                         --range.first;
 868                         lpos = (*range.first)->when;
 869                         lval = (*range.first)->value;
 870                 }  else {
 871                         /* we're before the first point */
 872                         // return _default_value;
 873                         return _events.front()->value;
 874                 }
 875
 876                 if (range.second == _events.end()) {
 877                         /* we're after the last point */
 878                         return _events.back()->value;
 879                 }
 880
 881                 upos = (*range.second)->when;
 882                 uval = (*range.second)->value;
 883
 884                 /* linear interpolation betweeen the two points
 885                    on either side of x
 886                 */
 887
 888                 fraction = (double) (x - lpos) / (double) (upos - lpos);
 889                 return lval + (fraction * (uval - lval));
 890
 891         }
 892
 893         /* x is a control point in the data */
 894         _lookup_cache.left = -1;
 895         return (*range.first)->value;
 896 }
 897
 898 void
 899 ControlList::build_search_cache_if_necessary(double start, double end) const
 900 {
 901         /* Only do the range lookup if x is in a different range than last time
 902          * this was called (or if the search cache has been marked "dirty" (left<0) */
 903         if (!_events.empty() && ((_search_cache.left < 0) ||
 904                         ((_search_cache.left > start) ||
 905                          (_search_cache.right < end)))) {
 906
 907                 const ControlEvent start_point (start, 0);
 908                 const ControlEvent end_point (end, 0);
 909
 910                 //cerr << "REBUILD: (" << _search_cache.left << ".." << _search_cache.right << ") := ("
 911                 //      << start << ".." << end << ")" << endl;
 912
 913                 _search_cache.range.first = lower_bound (_events.begin(), _events.end(), &start_point, time_comparator);
 914                 _search_cache.range.second = upper_bound (_events.begin(), _events.end(), &end_point, time_comparator);
 915
 916                 _search_cache.left = start;
 917                 _search_cache.right = end;
 918         }
 919 }
 920
 921 /** Get the earliest event between \a start and \a end, using the current interpolation style.
 922  *
 923  * If an event is found, \a x and \a y are set to its coordinates.
 924  *
 925  * \param inclusive Include events with timestamp exactly equal to \a start
 926  * \return true if event is found (and \a x and \a y are valid).
 927  */
 928 bool
 929 ControlList::rt_safe_earliest_event(double start, double end, double& x, double& y, bool inclusive) const
 930 {
 931         // FIXME: It would be nice if this was unnecessary..
 932         Glib::Mutex::Lock lm(_lock, Glib::TRY_LOCK);
 933         if (!lm.locked()) {
 934                 return false;
 935         }
 936
 937         return rt_safe_earliest_event_unlocked(start, end, x, y, inclusive);
 938 }
 939
 940
 941 /** Get the earliest event between \a start and \a end, using the current interpolation style.
 942  *
 943  * If an event is found, \a x and \a y are set to its coordinates.
 944  *
 945  * \param inclusive Include events with timestamp exactly equal to \a start
 946  * \return true if event is found (and \a x and \a y are valid).
 947  */
 948 bool
 949 ControlList::rt_safe_earliest_event_unlocked(double start, double end, double& x, double& y, bool inclusive) const
 950 {
 951         if (_interpolation == Discrete)
 952                 return rt_safe_earliest_event_discrete_unlocked(start, end, x, y, inclusive);
 953         else
 954                 return rt_safe_earliest_event_linear_unlocked(start, end, x, y, inclusive);
 955 }
 956
 957
 958 /** Get the earliest event between \a start and \a end (Discrete (lack of) interpolation)
 959  *
 960  * If an event is found, \a x and \a y are set to its coordinates.
 961  *
 962  * \param inclusive Include events with timestamp exactly equal to \a start
 963  * \return true if event is found (and \a x and \a y are valid).
 964  */
 965 bool
 966 ControlList::rt_safe_earliest_event_discrete_unlocked (double start, double end, double& x, double& y, bool inclusive) const
 967 {
 968         build_search_cache_if_necessary(start, end);
 969
 970         const pair<const_iterator,const_iterator>& range = _search_cache.range;
 971
 972         if (range.first != _events.end()) {
 973                 const ControlEvent* const first = *range.first;
 974
 975                 const bool past_start = (inclusive ? first->when >= start : first->when > start);
 976
 977                 /* Earliest points is in range, return it */
 978                 if (past_start && first->when < end) {
 979
 980                         x = first->when;
 981                         y = first->value;
 982
 983                         /* Move left of cache to this point
 984                          * (Optimize for immediate call this cycle within range) */
 985                         _search_cache.left = x;
 986                         ++_search_cache.range.first;
 987
 988                         assert(x >= start);
 989                         assert(x < end);
 990                         return true;
 991
 992                 } else {
 993                         return false;
 994                 }
 995
 996         /* No points in range */
 997         } else {
 998                 return false;
 999         }
1000 }
1001
1002 /** Get the earliest time the line crosses an integer (Linear interpolation).
1003  *
1004  * If an event is found, \a x and \a y are set to its coordinates.
1005  *
1006  * \param inclusive Include events with timestamp exactly equal to \a start
1007  * \return true if event is found (and \a x and \a y are valid).
1008  */
1009 bool
1010 ControlList::rt_safe_earliest_event_linear_unlocked (double start, double end, double& x, double& y, bool inclusive) const
1011 {
1012         cerr << "earliest_event(start: " << start << ", end: " << end << ", x: " << x << ", y: " << y << ", inclusive: " << inclusive <<  ")" << endl;
1013
1014         const_iterator length_check_iter = _events.begin();
1015         if (_events.empty()) // 0 events
1016                 return false;
1017         else if (_events.end() == ++length_check_iter) // 1 event
1018                 return rt_safe_earliest_event_discrete_unlocked(start, end, x, y, inclusive);
1019
1020         // Hack to avoid infinitely repeating the same event
1021         build_search_cache_if_necessary(start, end);
1022
1023         pair<const_iterator,const_iterator> range = _search_cache.range;
1024
1025         if (range.first != _events.end()) {
1026
1027                 const ControlEvent* first = NULL;
1028                 const ControlEvent* next = NULL;
1029
1030                 /* No events past start (maybe?) */
1031                 if (next && next->when < start)
1032                         return false;
1033
1034                 /* Step is after first */
1035                 if (range.first == _events.begin() || (*range.first)->when == start) {
1036                         first = *range.first;
1037                         next = *(++range.first);
1038                         ++_search_cache.range.first;
1039
1040                 /* Step is before first */
1041                 } else {
1042                         const_iterator prev = range.first;
1043                         --prev;
1044                         first = *prev;
1045                         next = *range.first;
1046                 }
1047
1048                 if (inclusive && first->when == start) {
1049                         x = first->when;
1050                         y = first->value;
1051                         /* Move left of cache to this point
1052                          * (Optimize for immediate call this cycle within range) */
1053                         _search_cache.left = x;
1054                         //++_search_cache.range.first;
1055                         assert(x >= start);
1056                         return true;
1057                 }
1058
1059                 if (fabs(first->value - next->value) <= 1) {
1060                         if (next->when <= end && (next->when > start)) {
1061                                 x = next->when;
1062                                 y = next->value;
1063                                 /* Move left of cache to this point
1064                                  * (Optimize for immediate call this cycle within range) */
1065                                 _search_cache.left = x;
1066                                 //++_search_cache.range.first;
1067                                 assert(inclusive ? x >= start : x > start);
1068                                 return true;
1069                         } else {
1070                                 return false;
1071                         }
1072                 }
1073
1074                 const double slope = (next->value - first->value) / (double)(next->when - first->when);
1075                 //cerr << "start y: " << start_y << endl;
1076
1077                 //y = first->value + (slope * fabs(start - first->when));
1078                 y = first->value;
1079
1080                 if (first->value < next->value) // ramping up
1081                         y = ceil(y);
1082                 else // ramping down
1083                         y = floor(y);
1084
1085                 x = first->when + (y - first->value) / (double)slope;
1086
1087                 while ((inclusive && x < start) || (x <= start && y != next->value)) {
1088
1089                         if (first->value < next->value) // ramping up
1090                                 y += 1.0;
1091                         else // ramping down
1092                                 y -= 1.0;
1093
1094                         x = first->when + (y - first->value) / (double)slope;
1095                 }
1096
1097                 cerr << first->value << " @ " << first->when << " ... "
1098                                 << next->value << " @ " << next->when
1099                                 << " = " << y << " @ " << x << endl;
1100
1101                 assert(    (y >= first->value && y <= next->value)
1102                                 || (y <= first->value && y >= next->value) );
1103
1104
1105                 const bool past_start = (inclusive ? x >= start : x > start);
1106                 if (past_start && x < end) {
1107                         /* Move left of cache to this point
1108                          * (Optimize for immediate call this cycle within range) */
1109                         _search_cache.left = x;
1110                         assert(inclusive ? x >= start : x > start);
1111                         return true;
1112                 } else {
1113                         return false;
1114                 }
1115
1116         /* No points in the future, so no steps (towards them) in the future */
1117         } else {
1118                 return false;
1119         }
1120 }
1121
1122 boost::shared_ptr<ControlList>
1123 ControlList::cut (iterator start, iterator end)
1124 {
1125         boost::shared_ptr<ControlList> nal = create (_parameter);
1126
1127         {
1128                 Glib::Mutex::Lock lm (_lock);
1129
1130                 for (iterator x = start; x != end; ) {
1131                         iterator tmp;
1132
1133                         tmp = x;
1134                         ++tmp;
1135
1136                         nal->_events.push_back (new ControlEvent (**x));
1137                         _events.erase (x);
1138
1139                         reposition_for_rt_add (0);
1140
1141                         x = tmp;
1142                 }
1143
1144                 mark_dirty ();
1145         }
1146
1147         maybe_signal_changed ();
1148
1149         return nal;
1150 }
1151
1152 boost::shared_ptr<ControlList>
1153 ControlList::cut_copy_clear (double start, double end, int op)
1154 {
1155         boost::shared_ptr<ControlList> nal = create (_parameter);
1156         iterator s, e;
1157         ControlEvent cp (start, 0.0);
1158         bool changed = false;
1159
1160         {
1161                 Glib::Mutex::Lock lm (_lock);
1162
1163                 if ((s = lower_bound (_events.begin(), _events.end(), &cp, time_comparator)) == _events.end()) {
1164                         return nal;
1165                 }
1166
1167                 cp.when = end;
1168                 e = upper_bound (_events.begin(), _events.end(), &cp, time_comparator);
1169
1170                 if (op != 2 && (*s)->when != start) {
1171                         nal->_events.push_back (new ControlEvent (0, unlocked_eval (start)));
1172                 }
1173
1174                 for (iterator x = s; x != e; ) {
1175                         iterator tmp;
1176
1177                         tmp = x;
1178                         ++tmp;
1179
1180                         changed = true;
1181
1182                         /* adjust new points to be relative to start, which
1183                            has been set to zero.
1184                         */
1185
1186                         if (op != 2) {
1187                                 nal->_events.push_back (new ControlEvent ((*x)->when - start, (*x)->value));
1188                         }
1189
1190                         if (op != 1) {
1191                                 _events.erase (x);
1192                         }
1193
1194                         x = tmp;
1195                 }
1196
1197                 if (op != 2 && nal->_events.back()->when != end - start) {
1198                         nal->_events.push_back (new ControlEvent (end - start, unlocked_eval (end)));
1199                 }
1200
1201                 if (changed) {
1202                         reposition_for_rt_add (0);
1203                 }
1204
1205                 mark_dirty ();
1206         }
1207
1208         maybe_signal_changed ();
1209
1210         return nal;
1211
1212 }
1213
1214 boost::shared_ptr<ControlList>
1215 ControlList::copy (iterator start, iterator end)
1216 {
1217         boost::shared_ptr<ControlList> nal = create (_parameter);
1218
1219         {
1220                 Glib::Mutex::Lock lm (_lock);
1221
1222                 for (iterator x = start; x != end; ) {
1223                         iterator tmp;
1224
1225                         tmp = x;
1226                         ++tmp;
1227
1228                         nal->_events.push_back (new ControlEvent (**x));
1229
1230                         x = tmp;
1231                 }
1232         }
1233
1234         return nal;
1235 }
1236
1237 boost::shared_ptr<ControlList>
1238 ControlList::cut (double start, double end)
1239 {
1240         return cut_copy_clear (start, end, 0);
1241 }
1242
1243 boost::shared_ptr<ControlList>
1244 ControlList::copy (double start, double end)
1245 {
1246         return cut_copy_clear (start, end, 1);
1247 }
1248
1249 void
1250 ControlList::clear (double start, double end)
1251 {
1252         (void) cut_copy_clear (start, end, 2);
1253 }
1254
1255 bool
1256 ControlList::paste (ControlList& alist, double pos, float times)
1257 {
1258         if (alist._events.empty()) {
1259                 return false;
1260         }
1261
1262         {
1263                 Glib::Mutex::Lock lm (_lock);
1264                 iterator where;
1265                 iterator prev;
1266                 double end = 0;
1267                 ControlEvent cp (pos, 0.0);
1268
1269                 where = upper_bound (_events.begin(), _events.end(), &cp, time_comparator);
1270
1271                 for (iterator i = alist.begin();i != alist.end(); ++i) {
1272                         _events.insert (where, new ControlEvent( (*i)->when+pos,( *i)->value));
1273                         end = (*i)->when + pos;
1274                 }
1275
1276
1277                 /* move all  points after the insertion along the timeline by
1278                    the correct amount.
1279                 */
1280
1281                 while (where != _events.end()) {
1282                         iterator tmp;
1283                         if ((*where)->when <= end) {
1284                                 tmp = where;
1285                                 ++tmp;
1286                                 _events.erase(where);
1287                                 where = tmp;
1288
1289                         } else {
1290                                 break;
1291                         }
1292                 }
1293
1294                 reposition_for_rt_add (0);
1295                 mark_dirty ();
1296         }
1297
1298         maybe_signal_changed ();
1299         return true;
1300 }
1301
1302 /** Move automation around according to a list of region movements */
1303 void
1304 ControlList::move_ranges (RangeMoveList const & movements)
1305 {
1306         {
1307                 Glib::Mutex::Lock lm (_lock);
1308
1309                 /* a copy of the events list before we started moving stuff around */
1310                 EventList old_events = _events;
1311
1312                 /* clear the source and destination ranges in the new list */
1313                 for (RangeMoveList::const_iterator i = movements.begin (); i != movements.end (); ++i) {
1314
1315                         erase_range_internal (i->from, i->from + i->length, _events);
1316                         erase_range_internal (i->to, i->to + i->length, _events);
1317
1318                 }
1319
1320                 /* copy the events into the new list */
1321                 for (RangeMoveList::const_iterator i = movements.begin (); i != movements.end (); ++i) {
1322                         iterator j = old_events.begin ();
1323                         EventTime const limit = i->from + i->length;
1324                         EventTime const dx = i->to - i->from;
1325                         while (j != old_events.end () && (*j)->when <= limit) {
1326                                 if ((*j)->when >= i->from) {
1327                                         ControlEvent* ev = new ControlEvent (**j);
1328                                         ev->when += dx;
1329                                         _events.push_back (ev);
1330                                 }
1331                                 ++j;
1332                         }
1333                 }
1334
1335                 if (!_frozen) {
1336                         _events.sort (event_time_less_than);
1337                 } else {
1338                         _sort_pending = true;
1339                 }
1340
1341                 reposition_for_rt_add (0);
1342                 mark_dirty ();
1343         }
1344
1345         maybe_signal_changed ();
1346 }
1347
1348 } // namespace Evoral
1349