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,
341 MidiStateTracker* tracker,
342 MidiChannelFilter* filter) const
344 return _read_at (_sources, out, position, dur, loop_range, chan_n, mode, tracker, filter);
348 MidiRegion::master_read_at (MidiRingBuffer<framepos_t>& out,
351 Evoral::Range<framepos_t>* loop_range,
355 return _read_at (_master_sources, out, position, dur, loop_range, chan_n, mode); /* no tracker */
359 MidiRegion::_read_at (const SourceList& /*srcs*/,
360 Evoral::EventSink<framepos_t>& dst,
363 Evoral::Range<framepos_t>* loop_range,
366 MidiStateTracker* tracker,
367 MidiChannelFilter* filter) const
369 frameoffset_t internal_offset = 0;
370 framecnt_t to_read = 0;
372 /* precondition: caller has verified that we cover the desired section */
377 return 0; /* read nothing */
380 if (position < _position) {
381 /* we are starting the read from before the start of the region */
383 dur -= _position - position;
385 /* we are starting the read from after the start of the region */
386 internal_offset = position - _position;
389 if (internal_offset >= _length) {
390 return 0; /* read nothing */
393 if ((to_read = min (dur, _length - internal_offset)) == 0) {
394 return 0; /* read nothing */
397 boost::shared_ptr<MidiSource> src = midi_source(chan_n);
399 Glib::Threads::Mutex::Lock lm(src->mutex());
401 src->set_note_mode(lm, mode);
404 cerr << "MR " << name () << " read @ " << position << " + " << to_read
405 << " dur was " << dur
406 << " len " << _length
407 << " l-io " << (_length - internal_offset)
408 << " _position = " << _position
409 << " _start = " << _start
410 << " intoffset = " << internal_offset
411 << " pulse = " << pulse()
412 << " start_pulse = " << start_pulse()
413 << " start_beat = " << _start_beats
417 /* This call reads events from a source and writes them to `dst' timed in session frames */
421 dst, // destination buffer
422 _position - _start, // start position of the source in session frames
423 _start + internal_offset, // where to start reading in the source
424 to_read, // read duration in frames
428 _filtered_parameters,
432 return 0; /* "read nothing" */
441 return Region::state ();
445 MidiRegion::set_state (const XMLNode& node, int version)
447 int ret = Region::set_state (node, version);
450 /* set length beats to the frame (non-musical) */
451 if (position_lock_style() == AudioTime) {
452 update_length_beats (0);
460 MidiRegion::recompute_at_end ()
462 /* our length has changed
463 * so what? stuck notes are dealt with via a note state tracker
468 MidiRegion::recompute_at_start ()
470 /* as above, but the shift was from the front
471 * maybe bump currently active note's note-ons up so they sound here?
472 * that could be undesireable in certain situations though.. maybe
473 * remove the note entirely, including it's note off? something needs to
474 * be done to keep the played MIDI sane to avoid messing up voices of
475 * polyhonic things etc........
480 MidiRegion::separate_by_channel (ARDOUR::Session&, vector< boost::shared_ptr<Region> >&) const
486 boost::shared_ptr<Evoral::Control>
487 MidiRegion::control (const Evoral::Parameter& id, bool create)
489 return model()->control(id, create);
492 boost::shared_ptr<const Evoral::Control>
493 MidiRegion::control (const Evoral::Parameter& id) const
495 return model()->control(id);
498 boost::shared_ptr<MidiModel>
501 return midi_source()->model();
504 boost::shared_ptr<const MidiModel>
505 MidiRegion::model() const
507 return midi_source()->model();
510 boost::shared_ptr<MidiSource>
511 MidiRegion::midi_source (uint32_t n) const
513 // Guaranteed to succeed (use a static cast?)
514 return boost::dynamic_pointer_cast<MidiSource>(source(n));
517 /* don't use this. hopefully it will go away.
518 currently used by headless-chicken session utility.
521 MidiRegion::clobber_sources (boost::shared_ptr<MidiSource> s)
525 _sources.push_back (s);
527 _master_sources.push_back (s);
530 s->DropReferences.connect_same_thread (*this, boost::bind (&Region::source_deleted, this, boost::weak_ptr<Source>(s)));
535 MidiRegion::model_changed ()
541 /* build list of filtered Parameters, being those whose automation state is not `Play' */
543 _filtered_parameters.clear ();
545 Automatable::Controls const & c = model()->controls();
547 for (Automatable::Controls::const_iterator i = c.begin(); i != c.end(); ++i) {
548 boost::shared_ptr<AutomationControl> ac = boost::dynamic_pointer_cast<AutomationControl> (i->second);
550 if (ac->alist()->automation_state() != Play) {
551 _filtered_parameters.insert (ac->parameter ());
555 /* watch for changes to controls' AutoState */
556 midi_source()->AutomationStateChanged.connect_same_thread (
557 _model_connection, boost::bind (&MidiRegion::model_automation_state_changed, this, _1)
562 MidiRegion::model_automation_state_changed (Evoral::Parameter const & p)
564 /* Update our filtered parameters list after a change to a parameter's AutoState */
566 boost::shared_ptr<AutomationControl> ac = model()->automation_control (p);
567 if (!ac || ac->alist()->automation_state() == Play) {
568 /* It should be "impossible" for ac to be NULL, but if it is, don't
569 filter the parameter so events aren't lost. */
570 _filtered_parameters.erase (p);
572 _filtered_parameters.insert (p);
575 /* the source will have an iterator into the model, and that iterator will have been set up
576 for a given set of filtered_parameters, so now that we've changed that list we must invalidate
579 Glib::Threads::Mutex::Lock lm (midi_source(0)->mutex(), Glib::Threads::TRY_LOCK);
581 /* TODO: This is too aggressive, we need more fine-grained invalidation. */
582 midi_source(0)->invalidate (lm);
586 /** This is called when a trim drag has resulted in a -ve _start time for this region.
587 * Fix it up by adding some empty space to the source.
590 MidiRegion::fix_negative_start ()
592 BeatsFramesConverter c (_session.tempo_map(), _position);
594 model()->insert_silence_at_start (c.from (-_start));
600 MidiRegion::set_start_internal (framecnt_t s, const int32_t sub_num)
602 Region::set_start_internal (s, sub_num);
603 if (position_lock_style() == AudioTime) {
604 set_start_beats_from_start_frames ();
609 MidiRegion::trim_to_internal (framepos_t position, framecnt_t length, const int32_t sub_num)
615 PropertyChange what_changed;
618 /* Set position before length, otherwise for MIDI regions this bad thing happens:
619 * 1. we call set_length_internal; length in beats is computed using the region's current
620 * (soon-to-be old) position
621 * 2. we call set_position_internal; position is set and length in frames re-computed using
622 * length in beats from (1) but at the new position, which is wrong if the region
623 * straddles a tempo/meter change.
626 if (_position != position) {
628 const double pos_qn = _session.tempo_map().exact_qn_at_frame (position, sub_num);
629 const double old_pos_qn = pulse() * 4.0;
631 /* sets _pulse to new position.*/
632 set_position_internal (position, true, sub_num);
633 what_changed.add (Properties::position);
635 double new_start_qn = start_beats() + (pos_qn - old_pos_qn);
636 const framepos_t new_start = _session.tempo_map().frame_at_quarter_note (pos_qn)
637 - _session.tempo_map().frame_at_quarter_note (pos_qn - new_start_qn);
639 if (!verify_start_and_length (new_start, length)) {
643 _start_beats = new_start_qn;
644 what_changed.add (Properties::start_beats);
646 set_start_internal (new_start, sub_num);
647 what_changed.add (Properties::start);
650 if (_length != length) {
652 if (!verify_start_and_length (_start, length)) {
656 set_length_internal (length, sub_num);
657 what_changed.add (Properties::length);
658 what_changed.add (Properties::length_beats);
661 set_whole_file (false);
663 PropertyChange start_and_length;
665 start_and_length.add (Properties::start);
666 start_and_length.add (Properties::length);
668 if (what_changed.contains (start_and_length)) {
672 if (!what_changed.empty()) {
673 send_change (what_changed);