2 Copyright (C) 2000-2006 Paul Davis
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.
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.
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.
18 $Id: midiregion.cc 746 2006-08-02 02:44:23Z drobilla $
27 #include <glibmm/threads.h>
28 #include <glibmm/fileutils.h>
29 #include <glibmm/miscutils.h>
31 #include "evoral/Beats.hpp"
33 #include "pbd/xml++.h"
34 #include "pbd/basename.h"
36 #include "ardour/automation_control.h"
37 #include "ardour/midi_model.h"
38 #include "ardour/midi_region.h"
39 #include "ardour/midi_ring_buffer.h"
40 #include "ardour/midi_source.h"
41 #include "ardour/region_factory.h"
42 #include "ardour/session.h"
43 #include "ardour/source_factory.h"
44 #include "ardour/tempo.h"
45 #include "ardour/types.h"
51 using namespace ARDOUR;
55 namespace Properties {
56 PBD::PropertyDescriptor<double> start_beats;
57 PBD::PropertyDescriptor<double> length_beats;
62 MidiRegion::make_property_quarks ()
64 Properties::start_beats.property_id = g_quark_from_static_string (X_("start-beats"));
65 DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for start-beats = %1\n", Properties::start_beats.property_id));
66 Properties::length_beats.property_id = g_quark_from_static_string (X_("length-beats"));
67 DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for length-beats = %1\n", Properties::length_beats.property_id));
71 MidiRegion::register_properties ()
73 add_property (_start_beats);
74 add_property (_length_beats);
77 /* Basic MidiRegion constructor (many channels) */
78 MidiRegion::MidiRegion (const SourceList& srcs)
80 , _start_beats (Properties::start_beats, 0.0)
81 , _length_beats (Properties::length_beats, midi_source(0)->length_beats().to_double())
83 register_properties ();
84 midi_source(0)->ModelChanged.connect_same_thread (_source_connection, boost::bind (&MidiRegion::model_changed, this));
86 assert(_name.val().find("/") == string::npos);
87 assert(_type == DataType::MIDI);
90 MidiRegion::MidiRegion (boost::shared_ptr<const MidiRegion> other)
92 , _start_beats (Properties::start_beats, other->_start_beats)
93 , _length_beats (Properties::length_beats, other->_length_beats)
95 //update_length_beats ();
96 register_properties ();
98 assert(_name.val().find("/") == string::npos);
99 midi_source(0)->ModelChanged.connect_same_thread (_source_connection, boost::bind (&MidiRegion::model_changed, this));
103 /** Create a new MidiRegion that is part of an existing one */
104 MidiRegion::MidiRegion (boost::shared_ptr<const MidiRegion> other, frameoffset_t offset, const int32_t sub_num)
105 : Region (other, offset, sub_num)
106 , _start_beats (Properties::start_beats, 0.0)
107 , _length_beats (Properties::length_beats, other->_length_beats)
109 _start_beats = (_session.tempo_map().exact_qn_at_frame (other->_position + offset, sub_num) - (other->pulse() * 4.0)) + other->_start_beats;
111 update_length_beats (sub_num);
112 register_properties ();
114 assert(_name.val().find("/") == string::npos);
115 midi_source(0)->ModelChanged.connect_same_thread (_source_connection, boost::bind (&MidiRegion::model_changed, this));
119 MidiRegion::~MidiRegion ()
123 /** Export the MIDI data of the MidiRegion to a new MIDI file (SMF).
126 MidiRegion::do_export (string path) const
128 boost::shared_ptr<MidiSource> newsrc;
130 /* caller must check for pre-existing file */
131 assert (!path.empty());
132 assert (!Glib::file_test (path, Glib::FILE_TEST_EXISTS));
133 newsrc = boost::dynamic_pointer_cast<MidiSource>(
134 SourceFactory::createWritable(DataType::MIDI, _session,
135 path, false, _session.frame_rate()));
137 BeatsFramesConverter bfc (_session.tempo_map(), _position);
138 Evoral::Beats const bbegin = bfc.from (_start);
139 Evoral::Beats const bend = bfc.from (_start + _length);
142 /* Lock our source since we'll be reading from it. write_to() will
143 take a lock on newsrc. */
144 Source::Lock lm (midi_source(0)->mutex());
145 if (midi_source(0)->export_write_to (lm, newsrc, bbegin, bend)) {
154 /** Create a new MidiRegion that has its own version of some/all of the Source used by another.
156 boost::shared_ptr<MidiRegion>
157 MidiRegion::clone (string path) const
159 boost::shared_ptr<MidiSource> newsrc;
161 /* caller must check for pre-existing file */
162 assert (!path.empty());
163 assert (!Glib::file_test (path, Glib::FILE_TEST_EXISTS));
164 newsrc = boost::dynamic_pointer_cast<MidiSource>(
165 SourceFactory::createWritable(DataType::MIDI, _session,
166 path, false, _session.frame_rate()));
167 return clone (newsrc);
170 boost::shared_ptr<MidiRegion>
171 MidiRegion::clone (boost::shared_ptr<MidiSource> newsrc) const
173 BeatsFramesConverter bfc (_session.tempo_map(), _position);
174 Evoral::Beats const bbegin = bfc.from (_start);
175 Evoral::Beats const bend = bfc.from (_start + _length);
178 /* Lock our source since we'll be reading from it. write_to() will
179 take a lock on newsrc. */
180 Source::Lock lm (midi_source(0)->mutex());
181 if (midi_source(0)->write_to (lm, newsrc, bbegin, bend)) {
182 return boost::shared_ptr<MidiRegion> ();
188 plist.add (Properties::name, PBD::basename_nosuffix (newsrc->name()));
189 plist.add (Properties::whole_file, true);
190 plist.add (Properties::start, _start);
191 plist.add (Properties::start_beats, _start_beats);
192 plist.add (Properties::length, _length);
193 plist.add (Properties::beat, _beat);
194 plist.add (Properties::length_beats, _length_beats);
195 plist.add (Properties::layer, 0);
197 boost::shared_ptr<MidiRegion> ret (boost::dynamic_pointer_cast<MidiRegion> (RegionFactory::create (newsrc, plist, true)));
198 ret->set_pulse (pulse());
204 MidiRegion::post_set (const PropertyChange& pc)
206 Region::post_set (pc);
208 if (pc.contains (Properties::length) && !pc.contains (Properties::length_beats)) {
209 /* we're called by Stateful::set_values() which sends a change
210 only if the value is different from _current.
211 session load means we can clobber length_beats here in error (not all properties differ from current),
212 so disallow (this has been set from XML state anyway).
214 if (!_session.loading()) {
215 /* update non-musically */
216 update_length_beats (0);
218 } else if (pc.contains (Properties::start) && !pc.contains (Properties::start_beats)) {
219 set_start_beats_from_start_frames ();
224 MidiRegion::set_start_beats_from_start_frames ()
226 _start_beats = (pulse() * 4.0) - _session.tempo_map().quarter_note_at_frame (_position - _start);
230 MidiRegion::set_length_internal (framecnt_t len, const int32_t sub_num)
232 Region::set_length_internal (len, sub_num);
233 update_length_beats (sub_num);
237 MidiRegion::update_after_tempo_map_change (bool /* send */)
239 boost::shared_ptr<Playlist> pl (playlist());
245 const framepos_t old_pos = _position;
246 const framepos_t old_length = _length;
247 const framepos_t old_start = _start;
249 PropertyChange s_and_l;
251 if (position_lock_style() == AudioTime) {
252 recompute_position_from_lock_style (0);
255 set _start to new position in tempo map.
257 The user probably expects the region contents to maintain audio position as the
258 tempo changes, but AFAICT this requires modifying the src file to use
259 SMPTE timestamps with the current disk read model (?).
261 We could arguably use _start to set _start_beats here,
262 resulting in viewport-like behaviour (the contents maintain
263 their musical position while the region is stationary).
265 For now, the musical position at the region start is retained, but subsequent events
266 will maintain their beat distance according to the map.
268 _start = _session.tempo_map().frame_at_quarter_note (pulse() * 4.0)
269 - _session.tempo_map().frame_at_quarter_note ((pulse() * 4.0) - start_beats());
271 /* _length doesn't change for audio-locked regions. update length_beats to match. */
272 _length_beats = _session.tempo_map().quarter_note_at_frame (_position + _length) - _session.tempo_map().quarter_note_at_frame (_position);
274 s_and_l.add (Properties::start);
275 s_and_l.add (Properties::length_beats);
277 send_change (s_and_l);
281 Region::update_after_tempo_map_change (false);
283 /* _start has now been updated. */
284 _length = _session.tempo_map().frame_at_pulse (pulse() + (_length_beats / 4.0)) - _position;
286 if (old_start != _start) {
287 s_and_l.add (Properties::start);
289 if (old_length != _length) {
290 s_and_l.add (Properties::length);
292 if (old_pos != _position) {
293 s_and_l.add (Properties::position);
296 send_change (s_and_l);
300 MidiRegion::update_length_beats (const int32_t sub_num)
302 _length_beats = _session.tempo_map().exact_qn_at_frame (_position + _length, sub_num) - (pulse() * 4.0);
306 MidiRegion::set_position_internal (framepos_t pos, bool allow_bbt_recompute, const int32_t sub_num)
308 Region::set_position_internal (pos, allow_bbt_recompute, sub_num);
310 /* don't clobber _start _length and _length_beats if session loading.*/
311 if (_session.loading()) {
315 /* set _start to new position in tempo map */
316 _start = _session.tempo_map().frame_at_quarter_note (pulse() * 4.0)
317 - _session.tempo_map().frame_at_quarter_note ((pulse() * 4.0) - start_beats());
319 /* in construction from src */
320 if (_length_beats == 0.0) {
321 update_length_beats (sub_num);
324 if (position_lock_style() == AudioTime) {
325 _length_beats = _session.tempo_map().quarter_note_at_frame (_position + _length) - _session.tempo_map().quarter_note_at_frame (_position);
327 /* leave _length_beats alone, and change _length to reflect the state of things
328 at the new position (tempo map may dictate a different number of frames).
330 Region::set_length_internal (_session.tempo_map().frame_at_quarter_note ((pulse() * 4.0) + length_beats()) - _position, sub_num);
335 MidiRegion::read_at (Evoral::EventSink<framepos_t>& out,
338 Evoral::Range<framepos_t>* loop_range,
342 MidiStateTracker* tracker,
343 MidiChannelFilter* filter) const
345 return _read_at (_sources, out, position, dur, loop_range, cursor, chan_n, mode, tracker, filter);
349 MidiRegion::master_read_at (MidiRingBuffer<framepos_t>& out,
352 Evoral::Range<framepos_t>* loop_range,
357 return _read_at (_master_sources, out, position, dur, loop_range, cursor, chan_n, mode); /* no tracker */
361 MidiRegion::_read_at (const SourceList& /*srcs*/,
362 Evoral::EventSink<framepos_t>& dst,
365 Evoral::Range<framepos_t>* loop_range,
369 MidiStateTracker* tracker,
370 MidiChannelFilter* filter) const
372 frameoffset_t internal_offset = 0;
373 framecnt_t to_read = 0;
375 /* precondition: caller has verified that we cover the desired section */
380 return 0; /* read nothing */
383 if (position < _position) {
384 /* we are starting the read from before the start of the region */
386 dur -= _position - position;
388 /* we are starting the read from after the start of the region */
389 internal_offset = position - _position;
392 if (internal_offset >= _length) {
393 return 0; /* read nothing */
396 if ((to_read = min (dur, _length - internal_offset)) == 0) {
397 return 0; /* read nothing */
400 boost::shared_ptr<MidiSource> src = midi_source(chan_n);
402 Glib::Threads::Mutex::Lock lm(src->mutex());
404 src->set_note_mode(lm, mode);
407 cerr << "MR " << name () << " read @ " << position << " + " << to_read
408 << " dur was " << dur
409 << " len " << _length
410 << " l-io " << (_length - internal_offset)
411 << " _position = " << _position
412 << " _start = " << _start
413 << " intoffset = " << internal_offset
414 << " pulse = " << pulse()
415 << " start_pulse = " << start_pulse()
416 << " start_beat = " << _start_beats
420 /* This call reads events from a source and writes them to `dst' timed in session frames */
424 dst, // destination buffer
425 _position - _start, // start position of the source in session frames
426 _start + internal_offset, // where to start reading in the source
427 to_read, // read duration in frames
432 _filtered_parameters,
436 return 0; /* "read nothing" */
445 return Region::state ();
449 MidiRegion::set_state (const XMLNode& node, int version)
451 int ret = Region::set_state (node, version);
454 /* set length beats to the frame (non-musical) */
455 if (position_lock_style() == AudioTime) {
456 update_length_beats (0);
464 MidiRegion::recompute_at_end ()
466 /* our length has changed
467 * so what? stuck notes are dealt with via a note state tracker
472 MidiRegion::recompute_at_start ()
474 /* as above, but the shift was from the front
475 * maybe bump currently active note's note-ons up so they sound here?
476 * that could be undesireable in certain situations though.. maybe
477 * remove the note entirely, including it's note off? something needs to
478 * be done to keep the played MIDI sane to avoid messing up voices of
479 * polyhonic things etc........
484 MidiRegion::separate_by_channel (ARDOUR::Session&, vector< boost::shared_ptr<Region> >&) const
490 boost::shared_ptr<Evoral::Control>
491 MidiRegion::control (const Evoral::Parameter& id, bool create)
493 return model()->control(id, create);
496 boost::shared_ptr<const Evoral::Control>
497 MidiRegion::control (const Evoral::Parameter& id) const
499 return model()->control(id);
502 boost::shared_ptr<MidiModel>
505 return midi_source()->model();
508 boost::shared_ptr<const MidiModel>
509 MidiRegion::model() const
511 return midi_source()->model();
514 boost::shared_ptr<MidiSource>
515 MidiRegion::midi_source (uint32_t n) const
517 // Guaranteed to succeed (use a static cast?)
518 return boost::dynamic_pointer_cast<MidiSource>(source(n));
521 /* don't use this. hopefully it will go away.
522 currently used by headless-chicken session utility.
525 MidiRegion::clobber_sources (boost::shared_ptr<MidiSource> s)
529 _sources.push_back (s);
531 _master_sources.push_back (s);
534 s->DropReferences.connect_same_thread (*this, boost::bind (&Region::source_deleted, this, boost::weak_ptr<Source>(s)));
539 MidiRegion::model_changed ()
545 /* build list of filtered Parameters, being those whose automation state is not `Play' */
547 _filtered_parameters.clear ();
549 Automatable::Controls const & c = model()->controls();
551 for (Automatable::Controls::const_iterator i = c.begin(); i != c.end(); ++i) {
552 boost::shared_ptr<AutomationControl> ac = boost::dynamic_pointer_cast<AutomationControl> (i->second);
554 if (ac->alist()->automation_state() != Play) {
555 _filtered_parameters.insert (ac->parameter ());
559 /* watch for changes to controls' AutoState */
560 midi_source()->AutomationStateChanged.connect_same_thread (
561 _model_connection, boost::bind (&MidiRegion::model_automation_state_changed, this, _1)
566 MidiRegion::model_automation_state_changed (Evoral::Parameter const & p)
568 /* Update our filtered parameters list after a change to a parameter's AutoState */
570 boost::shared_ptr<AutomationControl> ac = model()->automation_control (p);
571 if (!ac || ac->alist()->automation_state() == Play) {
572 /* It should be "impossible" for ac to be NULL, but if it is, don't
573 filter the parameter so events aren't lost. */
574 _filtered_parameters.erase (p);
576 _filtered_parameters.insert (p);
579 /* the source will have an iterator into the model, and that iterator will have been set up
580 for a given set of filtered_parameters, so now that we've changed that list we must invalidate
583 Glib::Threads::Mutex::Lock lm (midi_source(0)->mutex(), Glib::Threads::TRY_LOCK);
585 /* TODO: This is too aggressive, we need more fine-grained invalidation. */
586 midi_source(0)->invalidate (lm);
590 /** This is called when a trim drag has resulted in a -ve _start time for this region.
591 * Fix it up by adding some empty space to the source.
594 MidiRegion::fix_negative_start ()
596 BeatsFramesConverter c (_session.tempo_map(), _position);
598 model()->insert_silence_at_start (c.from (-_start));
604 MidiRegion::set_start_internal (framecnt_t s, const int32_t sub_num)
606 Region::set_start_internal (s, sub_num);
607 if (position_lock_style() == AudioTime) {
608 set_start_beats_from_start_frames ();
613 MidiRegion::trim_to_internal (framepos_t position, framecnt_t length, const int32_t sub_num)
619 PropertyChange what_changed;
622 /* Set position before length, otherwise for MIDI regions this bad thing happens:
623 * 1. we call set_length_internal; length in beats is computed using the region's current
624 * (soon-to-be old) position
625 * 2. we call set_position_internal; position is set and length in frames re-computed using
626 * length in beats from (1) but at the new position, which is wrong if the region
627 * straddles a tempo/meter change.
630 if (_position != position) {
632 const double pos_qn = _session.tempo_map().exact_qn_at_frame (position, sub_num);
633 const double old_pos_qn = pulse() * 4.0;
635 /* sets _pulse to new position.*/
636 set_position_internal (position, true, sub_num);
637 what_changed.add (Properties::position);
639 double new_start_qn = start_beats() + (pos_qn - old_pos_qn);
640 const framepos_t new_start = _session.tempo_map().frame_at_quarter_note (pos_qn)
641 - _session.tempo_map().frame_at_quarter_note (pos_qn - new_start_qn);
643 if (!verify_start_and_length (new_start, length)) {
647 _start_beats = new_start_qn;
648 what_changed.add (Properties::start_beats);
650 set_start_internal (new_start, sub_num);
651 what_changed.add (Properties::start);
654 if (_length != length) {
656 if (!verify_start_and_length (_start, length)) {
660 set_length_internal (length, sub_num);
661 what_changed.add (Properties::length);
662 what_changed.add (Properties::length_beats);
665 set_whole_file (false);
667 PropertyChange start_and_length;
669 start_and_length.add (Properties::start);
670 start_and_length.add (Properties::length);
672 if (what_changed.contains (start_and_length)) {
676 if (!what_changed.empty()) {
677 send_change (what_changed);