libs/ardour/midi_playlist.cc

   1 /*
   2     Copyright (C) 2006 Paul Davis
   3     Written by Dave Robillard, 2006
   4
   5     This program is free software; you can redistribute it and/or modify
   6     it under the terms of the GNU General Public License as published by
   7     the Free Software Foundation; either version 2 of the License, or
   8     (at your option) any later version.
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU General Public License for more details.
  14
  15     You should have received a copy of the GNU General Public License
  16     along with this program; if not, write to the Free Software
  17     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18 */
  19
  20 #include <cassert>
  21
  22 #include <algorithm>
  23 #include <iostream>
  24
  25 #include <stdlib.h>
  26
  27 #include "evoral/EventList.hpp"
  28
  29 #include "ardour/debug.h"
  30 #include "ardour/types.h"
  31 #include "ardour/configuration.h"
  32 #include "ardour/midi_playlist.h"
  33 #include "ardour/midi_region.h"
  34 #include "ardour/session.h"
  35 #include "ardour/midi_ring_buffer.h"
  36
  37 #include "pbd/error.h"
  38
  39 #include "i18n.h"
  40
  41 using namespace ARDOUR;
  42 using namespace PBD;
  43 using namespace std;
  44
  45 MidiPlaylist::MidiPlaylist (Session& session, const XMLNode& node, bool hidden)
  46         : Playlist (session, node, DataType::MIDI, hidden)
  47         , _note_mode(Sustained)
  48 {
  49 #ifndef NDEBUG
  50         const XMLProperty* prop = node.property("type");
  51         assert(prop && DataType(prop->value()) == DataType::MIDI);
  52 #endif
  53
  54         in_set_state++;
  55         set_state (node, Stateful::loading_state_version);
  56         in_set_state--;
  57 }
  58
  59 MidiPlaylist::MidiPlaylist (Session& session, string name, bool hidden)
  60         : Playlist (session, name, DataType::MIDI, hidden)
  61         , _note_mode(Sustained)
  62 {
  63 }
  64
  65 MidiPlaylist::MidiPlaylist (boost::shared_ptr<const MidiPlaylist> other, string name, bool hidden)
  66         : Playlist (other, name, hidden)
  67         , _note_mode(other->_note_mode)
  68 {
  69 }
  70
  71 MidiPlaylist::MidiPlaylist (boost::shared_ptr<const MidiPlaylist> other, nframes_t start, nframes_t dur, string name, bool hidden)
  72         : Playlist (other, start, dur, name, hidden)
  73         , _note_mode(other->_note_mode)
  74 {
  75         /* this constructor does NOT notify others (session) */
  76 }
  77
  78 MidiPlaylist::~MidiPlaylist ()
  79 {
  80 }
  81
  82 template<typename Time>
  83 struct EventsSortByTime {
  84     bool operator() (Evoral::Event<Time>* a, Evoral::Event<Time>* b) {
  85             return a->time() < b->time();
  86     }
  87 };
  88
  89 /** Returns the number of frames in time duration read (eg could be large when 0 events are read) */
  90 nframes_t
  91 MidiPlaylist::read (MidiRingBuffer<nframes_t>& dst, nframes_t start, nframes_t dur, unsigned chan_n)
  92 {
  93         /* this function is never called from a realtime thread, so
  94            its OK to block (for short intervals).
  95         */
  96
  97         Glib::RecMutex::Lock rm (region_lock);
  98         DEBUG_TRACE (DEBUG::MidiPlaylistIO, string_compose ("++++++ %1 .. %2  +++++++++++++++++++++++++++++++++++++++++++++++\n", start, start + dur));
  99
 100         nframes_t end = start + dur - 1;
 101
 102         _read_data_count = 0;
 103
 104         // relevent regions overlapping start <--> end
 105         vector< boost::shared_ptr<Region> > regs;
 106         typedef pair<MidiStateTracker*,nframes64_t> TrackerInfo;
 107         vector<TrackerInfo> tracker_info;
 108         uint32_t note_cnt = 0;
 109
 110         for (RegionList::iterator i = regions.begin(); i != regions.end(); ++i) {
 111                 if ((*i)->coverage (start, end) != OverlapNone) {
 112                         regs.push_back(*i);
 113                 } else {
 114                         NoteTrackers::iterator t = _note_trackers.find ((*i).get());
 115                         if (t != _note_trackers.end()) {
 116
 117                                 /* add it the set of trackers we will do note resolution
 118                                    on, and remove it from the list we are keeping
 119                                    around, because we don't need it anymore.
 120
 121                                    if the end of the region (where we want to theoretically resolve notes)
 122                                    is outside the current read range, then just do it at the start
 123                                    of this read range.
 124                                 */
 125
 126                                 nframes64_t resolve_at = (*i)->last_frame();
 127                                 if (resolve_at >= end) {
 128                                         resolve_at = start;
 129                                 }
 130
 131                                 tracker_info.push_back (TrackerInfo (t->second, resolve_at));
 132                                 DEBUG_TRACE (DEBUG::MidiPlaylistIO, string_compose ("time to resolve & remove tracker for %1 @ %2\n", (*i)->name(), resolve_at));
 133                                 note_cnt += (t->second->on());
 134                                 _note_trackers.erase (t);
 135                         }
 136                 }
 137         }
 138
 139         if (note_cnt == 0 && !tracker_info.empty()) {
 140                 /* trackers to dispose of, but they have no notes in them */
 141                 DEBUG_TRACE (DEBUG::MidiPlaylistIO, string_compose ("Clearing %1 empty trackers\n", tracker_info.size()));
 142                 for (vector<TrackerInfo>::iterator t = tracker_info.begin(); t != tracker_info.end(); ++t) {
 143                         delete (*t).first;
 144                 }
 145                 tracker_info.clear ();
 146         }
 147
 148         if (regs.size() == 1 && tracker_info.empty()) {
 149
 150                 /* just a single region - read directly into dst */
 151
 152                 DEBUG_TRACE (DEBUG::MidiPlaylistIO, string_compose ("Single region (%1) read, no out-of-bound region tracking info\n", regs.front()->name()));
 153
 154                 boost::shared_ptr<MidiRegion> mr = boost::dynamic_pointer_cast<MidiRegion>(regs.front());
 155
 156                 if (mr) {
 157
 158                         NoteTrackers::iterator t = _note_trackers.find (mr.get());
 159                         MidiStateTracker* tracker;
 160                         bool new_tracker = false;
 161
 162                         if (t == _note_trackers.end()) {
 163                                 tracker = new MidiStateTracker;
 164                                 new_tracker = true;
 165                                 DEBUG_TRACE (DEBUG::MidiPlaylistIO, "\tBEFORE: new tracker\n");
 166                         } else {
 167                                 tracker = t->second;
 168                                 DEBUG_TRACE (DEBUG::MidiPlaylistIO, string_compose ("\tBEFORE: tracker says there are %1 on notes\n", tracker->on()));
 169                         }
 170
 171                         mr->read_at (dst, start, dur, chan_n, _note_mode, tracker);
 172                         DEBUG_TRACE (DEBUG::MidiPlaylistIO, string_compose ("\tAFTER: tracker says there are %1 on notes\n", tracker->on()));
 173
 174                         if (new_tracker) {
 175                                 pair<Region*,MidiStateTracker*> newpair;
 176                                 newpair.first = mr.get();
 177                                 newpair.second = tracker;
 178                                 _note_trackers.insert (newpair);
 179                                 DEBUG_TRACE (DEBUG::MidiPlaylistIO, "\tadded tracker to trackers\n");
 180                         }
 181
 182                         _read_data_count += mr->read_data_count();
 183                 }
 184
 185         } else {
 186
 187                 /* multiple regions and/or note resolution: sort by layer, read into a temporary non-monotonically
 188                    sorted EventSink, sort and then insert into dst.
 189                 */
 190
 191                 DEBUG_TRACE (DEBUG::MidiPlaylistIO, string_compose ("%1 regions to read, plus %2 trackers\n", regs.size(), tracker_info.size()));
 192
 193                 Evoral::EventList<nframes_t> evlist;
 194
 195                 for (vector<TrackerInfo>::iterator t = tracker_info.begin(); t != tracker_info.end(); ++t) {
 196                         DEBUG_TRACE (DEBUG::MidiPlaylistIO, string_compose ("Resolve %1 notes\n", (*t).first->on()));
 197                         (*t).first->resolve_notes (evlist, (*t).second);
 198                         delete (*t).first;
 199                 }
 200
 201 #ifndef NDEBUG
 202                 DEBUG_TRACE (DEBUG::MidiPlaylistIO, string_compose ("After resolution we now have %1 events\n",  evlist.size()));
 203                 for (Evoral::EventList<nframes_t>::iterator x = evlist.begin(); x != evlist.end(); ++x) {
 204                         DEBUG_TRACE (DEBUG::MidiPlaylistIO, string_compose ("\t%1\n", **x));
 205                 }
 206 #endif
 207
 208                 DEBUG_TRACE (DEBUG::MidiPlaylistIO, string_compose ("for %1 .. %2 we have %3 to consider\n", start, start+dur-1, regs.size()));
 209
 210                 for (vector<boost::shared_ptr<Region> >::iterator i = regs.begin(); i != regs.end(); ++i) {
 211                         boost::shared_ptr<MidiRegion> mr = boost::dynamic_pointer_cast<MidiRegion>(*i);
 212                         if (!mr) {
 213                                 continue;
 214                         }
 215
 216                         NoteTrackers::iterator t = _note_trackers.find (mr.get());
 217                         MidiStateTracker* tracker;
 218                         bool new_tracker = false;
 219
 220
 221                         DEBUG_TRACE (DEBUG::MidiPlaylistIO, string_compose ("Before %1 (%2 .. %3) we now have %4 events\n", mr->name(), mr->position(), mr->last_frame(), evlist.size()));
 222
 223                         if (t == _note_trackers.end()) {
 224                                 tracker = new MidiStateTracker;
 225                                 new_tracker = true;
 226                                 DEBUG_TRACE (DEBUG::MidiPlaylistIO, "\tBEFORE: new tracker\n");
 227                         } else {
 228                                 tracker = t->second;
 229                                 DEBUG_TRACE (DEBUG::MidiPlaylistIO, string_compose ("\tBEFORE: tracker says there are %1 on notes\n", tracker->on()));
 230                         }
 231
 232
 233                         mr->read_at (evlist, start, dur, chan_n, _note_mode, tracker);
 234                         _read_data_count += mr->read_data_count();
 235
 236 #ifndef NDEBUG
 237                         DEBUG_TRACE (DEBUG::MidiPlaylistIO, string_compose ("After %1 (%2 .. %3) we now have %4\n", mr->name(), mr->position(), mr->last_frame(), evlist.size()));
 238                         for (Evoral::EventList<nframes_t>::iterator x = evlist.begin(); x != evlist.end(); ++x) {
 239                                 DEBUG_TRACE (DEBUG::MidiPlaylistIO, string_compose ("\t%1\n", **x));
 240                         }
 241                         DEBUG_TRACE (DEBUG::MidiPlaylistIO, string_compose ("\tAFTER: tracker says there are %1 on notes\n", tracker->on()));
 242 #endif
 243
 244                         if (new_tracker) {
 245                                 pair<Region*,MidiStateTracker*> newpair;
 246                                 newpair.first = mr.get();
 247                                 newpair.second = tracker;
 248                                 _note_trackers.insert (newpair);
 249                                 DEBUG_TRACE (DEBUG::MidiPlaylistIO, "\tadded tracker to trackers\n");
 250                         }
 251                 }
 252
 253                 if (!evlist.empty()) {
 254
 255                         /* sort the event list */
 256                         EventsSortByTime<nframes_t> time_cmp;
 257                         evlist.sort (time_cmp);
 258
 259 #ifndef NDEBUG
 260                         DEBUG_TRACE (DEBUG::MidiPlaylistIO, string_compose ("Final we now have %1 events\n",  evlist.size()));
 261                         for (Evoral::EventList<nframes_t>::iterator x = evlist.begin(); x != evlist.end(); ++x) {
 262                                 DEBUG_TRACE (DEBUG::MidiPlaylistIO, string_compose ("\t%1\n", **x));
 263                         }
 264 #endif
 265                         /* write into dst */
 266                         for (Evoral::EventList<nframes_t>::iterator e = evlist.begin(); e != evlist.end(); ++e) {
 267                                 Evoral::Event<nframes_t>* ev (*e);
 268                                 dst.write (ev->time(), ev->event_type(), ev->size(), ev->buffer());
 269                                 delete ev;
 270                         }
 271
 272                 }
 273         }
 274
 275         DEBUG_TRACE (DEBUG::MidiPlaylistIO, "-------------------------------------------------------------\n");
 276         return dur;
 277 }
 278
 279 void
 280 MidiPlaylist::clear_note_trackers ()
 281 {
 282         Glib::RecMutex::Lock rm (region_lock);
 283         for (NoteTrackers::iterator n = _note_trackers.begin(); n != _note_trackers.end(); ++n) {
 284                 delete n->second;
 285         }
 286         _note_trackers.clear ();
 287 }
 288
 289 void
 290 MidiPlaylist::remove_dependents (boost::shared_ptr<Region> region)
 291 {
 292         /* MIDI regions have no dependents (crossfades) but we might be tracking notes */
 293         NoteTrackers::iterator t = _note_trackers.find (region.get());
 294
 295         /* GACK! THREAD SAFETY! */
 296
 297         if (t != _note_trackers.end()) {
 298                 delete t->second;
 299                 _note_trackers.erase (t);
 300         }
 301 }
 302
 303
 304 void
 305 MidiPlaylist::refresh_dependents (boost::shared_ptr<Region> /*r*/)
 306 {
 307         /* MIDI regions have no dependents (crossfades) */
 308 }
 309
 310 void
 311 MidiPlaylist::finalize_split_region (boost::shared_ptr<Region> /*original*/, boost::shared_ptr<Region> /*left*/, boost::shared_ptr<Region> /*right*/)
 312 {
 313         /* No MIDI crossfading (yet?), so nothing to do here */
 314 }
 315
 316 void
 317 MidiPlaylist::check_dependents (boost::shared_ptr<Region> /*r*/, bool /*norefresh*/)
 318 {
 319         /* MIDI regions have no dependents (crossfades) */
 320 }
 321
 322
 323 int
 324 MidiPlaylist::set_state (const XMLNode& node, int version)
 325 {
 326         in_set_state++;
 327         freeze ();
 328
 329         Playlist::set_state (node, version);
 330
 331         thaw();
 332         in_set_state--;
 333
 334         return 0;
 335 }
 336
 337 void
 338 MidiPlaylist::dump () const
 339 {
 340         boost::shared_ptr<Region> r;
 341
 342         cerr << "Playlist \"" << _name << "\" " << endl
 343         << regions.size() << " regions "
 344         << endl;
 345
 346         for (RegionList::const_iterator i = regions.begin(); i != regions.end(); ++i) {
 347                 r = *i;
 348                 cerr << "  " << r->name() << " @ " << r << " ["
 349                 << r->start() << "+" << r->length()
 350                 << "] at "
 351                 << r->position()
 352                 << " on layer "
 353                 << r->layer ()
 354                 << endl;
 355         }
 356 }
 357
 358 bool
 359 MidiPlaylist::destroy_region (boost::shared_ptr<Region> region)
 360 {
 361         boost::shared_ptr<MidiRegion> r = boost::dynamic_pointer_cast<MidiRegion> (region);
 362
 363         if (!r) {
 364                 return false;
 365         }
 366
 367         bool changed = false;
 368
 369         {
 370                 RegionLock rlock (this);
 371                 RegionList::iterator i;
 372                 RegionList::iterator tmp;
 373
 374                 for (i = regions.begin(); i != regions.end(); ) {
 375
 376                         tmp = i;
 377                         ++tmp;
 378
 379                         if ((*i) == region) {
 380                                 regions.erase (i);
 381                                 changed = true;
 382                         }
 383
 384                         i = tmp;
 385                 }
 386         }
 387
 388
 389         if (changed) {
 390                 /* overload this, it normally means "removed", not destroyed */
 391                 notify_region_removed (region);
 392         }
 393
 394         return changed;
 395 }
 396
 397 set<Evoral::Parameter>
 398 MidiPlaylist::contained_automation()
 399 {
 400         /* this function is never called from a realtime thread, so
 401            its OK to block (for short intervals).
 402         */
 403
 404         Glib::RecMutex::Lock rm (region_lock);
 405
 406         set<Evoral::Parameter> ret;
 407
 408         for (RegionList::const_iterator r = regions.begin(); r != regions.end(); ++r) {
 409                 boost::shared_ptr<MidiRegion> mr = boost::dynamic_pointer_cast<MidiRegion>(*r);
 410
 411                 for (Automatable::Controls::iterator c = mr->model()->controls().begin();
 412                                 c != mr->model()->controls().end(); ++c) {
 413                         ret.insert(c->first);
 414                 }
 415         }
 416
 417         return ret;
 418 }
 419
 420
 421 bool
 422 MidiPlaylist::region_changed (const PBD::PropertyChange& what_changed, boost::shared_ptr<Region> region)
 423 {
 424         if (in_flush || in_set_state) {
 425                 return false;
 426         }
 427
 428         // Feeling rather uninterested today, but thanks for the heads up anyway!
 429
 430         PBD::PropertyChange our_interests;
 431
 432         bool parent_wants_notify;
 433
 434         parent_wants_notify = Playlist::region_changed (what_changed, region);
 435
 436         if (parent_wants_notify || what_changed.contains (our_interests)) {
 437                 notify_contents_changed ();
 438         }
 439
 440         return true;
 441 }
 442