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<Evoral::Beats> start_beats;
57 PBD::PropertyDescriptor<Evoral::Beats> 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, Evoral::Beats())
81 , _length_beats (Properties::length_beats, midi_source(0)->length_beats())
83 register_properties ();
85 midi_source(0)->ModelChanged.connect_same_thread (_source_connection, boost::bind (&MidiRegion::model_changed, this));
87 assert(_name.val().find("/") == string::npos);
88 assert(_type == DataType::MIDI);
91 MidiRegion::MidiRegion (boost::shared_ptr<const MidiRegion> other)
93 , _start_beats (Properties::start_beats, other->_start_beats)
94 , _length_beats (Properties::length_beats, other->_length_beats)
96 //update_length_beats ();
97 register_properties ();
99 assert(_name.val().find("/") == string::npos);
100 midi_source(0)->ModelChanged.connect_same_thread (_source_connection, boost::bind (&MidiRegion::model_changed, this));
104 /** Create a new MidiRegion that is part of an existing one */
105 MidiRegion::MidiRegion (boost::shared_ptr<const MidiRegion> other, frameoffset_t offset)
106 : Region (other, offset)
107 , _start_beats (Properties::start_beats, Evoral::Beats())
108 , _length_beats (Properties::length_beats, other->_length_beats)
110 BeatsFramesConverter bfc (_session.tempo_map(), other->_position);
111 Evoral::Beats const offset_beats = bfc.from (offset);
113 _start_beats = other->_start_beats.val() + offset_beats;
114 register_properties ();
116 assert(_name.val().find("/") == string::npos);
117 midi_source(0)->ModelChanged.connect_same_thread (_source_connection, boost::bind (&MidiRegion::model_changed, this));
121 MidiRegion::~MidiRegion ()
125 /** Create a new MidiRegion that has its own version of some/all of the Source used by another.
127 boost::shared_ptr<MidiRegion>
128 MidiRegion::clone (string path) const
130 boost::shared_ptr<MidiSource> newsrc;
132 /* caller must check for pre-existing file */
133 assert (!path.empty());
134 assert (!Glib::file_test (path, Glib::FILE_TEST_EXISTS));
135 newsrc = boost::dynamic_pointer_cast<MidiSource>(
136 SourceFactory::createWritable(DataType::MIDI, _session,
137 path, false, _session.frame_rate()));
138 return clone (newsrc);
141 boost::shared_ptr<MidiRegion>
142 MidiRegion::clone (boost::shared_ptr<MidiSource> newsrc) const
144 BeatsFramesConverter bfc (_session.tempo_map(), _position);
145 Evoral::Beats const bbegin = bfc.from (_start);
146 Evoral::Beats const bend = bfc.from (_start + _length);
149 /* Lock our source since we'll be reading from it. write_to() will
150 take a lock on newsrc. */
151 Source::Lock lm (midi_source(0)->mutex());
152 if (midi_source(0)->write_to (lm, newsrc, bbegin, bend)) {
153 return boost::shared_ptr<MidiRegion> ();
159 plist.add (Properties::name, PBD::basename_nosuffix (newsrc->name()));
160 plist.add (Properties::whole_file, true);
161 plist.add (Properties::start, _start);
162 plist.add (Properties::start_beats, _start_beats);
163 plist.add (Properties::length, _length);
164 plist.add (Properties::length_beats, _length_beats);
165 plist.add (Properties::layer, 0);
167 return boost::dynamic_pointer_cast<MidiRegion> (RegionFactory::create (newsrc, plist, true));
171 MidiRegion::post_set (const PropertyChange& pc)
173 Region::post_set (pc);
175 if (pc.contains (Properties::length) && !pc.contains (Properties::length_beats)) {
176 update_length_beats ();
177 } else if (pc.contains (Properties::start) && !pc.contains (Properties::start_beats)) {
178 set_start_beats_from_start_frames ();
183 MidiRegion::set_start_beats_from_start_frames ()
185 _start_beats = Evoral::Beats (beat() - _session.tempo_map().beat_at_frame (_position - _start));
189 MidiRegion::set_length_internal (framecnt_t len)
191 Region::set_length_internal (len);
192 update_length_beats ();
196 MidiRegion::update_after_tempo_map_change (bool /* send */)
198 Region::update_after_tempo_map_change (false);
200 /* _start has now been updated. */
201 _length = _session.tempo_map().framepos_plus_beats (_position, _length_beats) - _position;
203 PropertyChange s_and_l;
204 s_and_l.add (Properties::start);
205 s_and_l.add (Properties::length);
206 s_and_l.add (Properties::position);
208 send_change (s_and_l);
212 MidiRegion::update_length_beats ()
214 _length_beats = Evoral::Beats (_session.tempo_map().beat_at_frame (_position + _length) - beat());
218 MidiRegion::set_position_internal (framepos_t pos, bool allow_bbt_recompute)
220 Region::set_position_internal (pos, allow_bbt_recompute);
222 /* set _start to new position in tempo map */
223 _start = _position - _session.tempo_map().frame_at_beat (beat() - _start_beats.val().to_double());
225 /* leave _length_beats alone, and change _length to reflect the state of things
226 at the new position (tempo map may dictate a different number of frames).
228 Region::set_length_internal (_session.tempo_map().frame_at_beat (beat() + _length_beats.val().to_double()) - _position);
232 MidiRegion::read_at (Evoral::EventSink<framepos_t>& out,
237 MidiStateTracker* tracker,
238 MidiChannelFilter* filter) const
240 return _read_at (_sources, out, position, dur, chan_n, mode, tracker, filter);
244 MidiRegion::master_read_at (MidiRingBuffer<framepos_t>& out, framepos_t position, framecnt_t dur, uint32_t chan_n, NoteMode mode) const
246 return _read_at (_master_sources, out, position, dur, chan_n, mode); /* no tracker */
250 MidiRegion::_read_at (const SourceList& /*srcs*/,
251 Evoral::EventSink<framepos_t>& dst,
256 MidiStateTracker* tracker,
257 MidiChannelFilter* filter) const
259 frameoffset_t internal_offset = 0;
260 framecnt_t to_read = 0;
262 /* precondition: caller has verified that we cover the desired section */
267 return 0; /* read nothing */
270 if (position < _position) {
271 /* we are starting the read from before the start of the region */
273 dur -= _position - position;
275 /* we are starting the read from after the start of the region */
276 internal_offset = position - _position;
279 if (internal_offset >= _length) {
280 return 0; /* read nothing */
283 if ((to_read = min (dur, _length - internal_offset)) == 0) {
284 return 0; /* read nothing */
287 boost::shared_ptr<MidiSource> src = midi_source(chan_n);
289 Glib::Threads::Mutex::Lock lm(src->mutex());
291 src->set_note_mode(lm, mode);
294 cerr << "MR " << name () << " read @ " << position << " * " << to_read
295 << " _position = " << _position
296 << " _start = " << _start
297 << " intoffset = " << internal_offset
301 /* This call reads events from a source and writes them to `dst' timed in session frames */
305 dst, // destination buffer
306 _position - _start, // start position of the source in session frames
307 _start + internal_offset, // where to start reading in the source
308 to_read, // read duration in frames
313 return 0; /* "read nothing" */
322 return Region::state ();
326 MidiRegion::set_state (const XMLNode& node, int version)
328 int ret = Region::set_state (node, version);
331 update_length_beats ();
338 MidiRegion::recompute_at_end ()
340 /* our length has changed
341 * so what? stuck notes are dealt with via a note state tracker
346 MidiRegion::recompute_at_start ()
348 /* as above, but the shift was from the front
349 * maybe bump currently active note's note-ons up so they sound here?
350 * that could be undesireable in certain situations though.. maybe
351 * remove the note entirely, including it's note off? something needs to
352 * be done to keep the played MIDI sane to avoid messing up voices of
353 * polyhonic things etc........
358 MidiRegion::separate_by_channel (ARDOUR::Session&, vector< boost::shared_ptr<Region> >&) const
364 boost::shared_ptr<Evoral::Control>
365 MidiRegion::control (const Evoral::Parameter& id, bool create)
367 return model()->control(id, create);
370 boost::shared_ptr<const Evoral::Control>
371 MidiRegion::control (const Evoral::Parameter& id) const
373 return model()->control(id);
376 boost::shared_ptr<MidiModel>
379 return midi_source()->model();
382 boost::shared_ptr<const MidiModel>
383 MidiRegion::model() const
385 return midi_source()->model();
388 boost::shared_ptr<MidiSource>
389 MidiRegion::midi_source (uint32_t n) const
391 // Guaranteed to succeed (use a static cast?)
392 return boost::dynamic_pointer_cast<MidiSource>(source(n));
396 MidiRegion::model_changed ()
402 /* build list of filtered Parameters, being those whose automation state is not `Play' */
404 _filtered_parameters.clear ();
406 Automatable::Controls const & c = model()->controls();
408 for (Automatable::Controls::const_iterator i = c.begin(); i != c.end(); ++i) {
409 boost::shared_ptr<AutomationControl> ac = boost::dynamic_pointer_cast<AutomationControl> (i->second);
411 if (ac->alist()->automation_state() != Play) {
412 _filtered_parameters.insert (ac->parameter ());
416 /* watch for changes to controls' AutoState */
417 midi_source()->AutomationStateChanged.connect_same_thread (
418 _model_connection, boost::bind (&MidiRegion::model_automation_state_changed, this, _1)
423 MidiRegion::model_automation_state_changed (Evoral::Parameter const & p)
425 /* Update our filtered parameters list after a change to a parameter's AutoState */
427 boost::shared_ptr<AutomationControl> ac = model()->automation_control (p);
428 if (!ac || ac->alist()->automation_state() == Play) {
429 /* It should be "impossible" for ac to be NULL, but if it is, don't
430 filter the parameter so events aren't lost. */
431 _filtered_parameters.erase (p);
433 _filtered_parameters.insert (p);
436 /* the source will have an iterator into the model, and that iterator will have been set up
437 for a given set of filtered_parameters, so now that we've changed that list we must invalidate
440 Glib::Threads::Mutex::Lock lm (midi_source(0)->mutex(), Glib::Threads::TRY_LOCK);
442 /* TODO: This is too aggressive, we need more fine-grained invalidation. */
443 midi_source(0)->invalidate (lm);
447 /** This is called when a trim drag has resulted in a -ve _start time for this region.
448 * Fix it up by adding some empty space to the source.
451 MidiRegion::fix_negative_start ()
453 BeatsFramesConverter c (_session.tempo_map(), _position);
455 model()->insert_silence_at_start (c.from (-_start));
457 _start_beats = Evoral::Beats();
461 MidiRegion::set_start_internal (framecnt_t s)
463 Region::set_start_internal (s);
464 set_start_beats_from_start_frames ();
468 MidiRegion::trim_to_internal (framepos_t position, framecnt_t length)
470 framepos_t new_start;
476 PropertyChange what_changed;
478 /* beat has not been set by set_position_internal */
479 const double beat_delta = _session.tempo_map().beat_at_frame (position) - beat();
481 /* Set position before length, otherwise for MIDI regions this bad thing happens:
482 * 1. we call set_length_internal; length in beats is computed using the region's current
483 * (soon-to-be old) position
484 * 2. we call set_position_internal; position is set and length in frames re-computed using
485 * length in beats from (1) but at the new position, which is wrong if the region
486 * straddles a tempo/meter change.
489 if (_position != position) {
490 set_position_internal (position, true);
491 what_changed.add (Properties::position);
494 const double new_beat = _session.tempo_map().beat_at_frame (position);
495 const double new_start_beat = _start_beats.val().to_double() + beat_delta;
497 new_start = _position - _session.tempo_map().frame_at_beat (new_beat - new_start_beat);
499 if (!verify_start_and_length (new_start, length)) {
503 if (_start != new_start) {
504 _start_beats = Evoral::Beats (new_start_beat);
505 what_changed.add (Properties::start_beats);
507 set_start_internal (new_start);
508 what_changed.add (Properties::start);
513 if (_length != length) {
514 set_length_internal (length);
515 what_changed.add (Properties::length);
518 set_whole_file (false);
520 PropertyChange start_and_length;
522 start_and_length.add (Properties::start);
523 start_and_length.add (Properties::length);
525 if (what_changed.contains (start_and_length)) {
529 if (!what_changed.empty()) {
530 send_change (what_changed);