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/thread.h>
29 #include "pbd/xml++.h"
31 #include "ardour/automation_control.h"
32 #include "ardour/midi_model.h"
33 #include "ardour/midi_region.h"
34 #include "ardour/midi_ring_buffer.h"
35 #include "ardour/midi_source.h"
36 #include "ardour/region_factory.h"
37 #include "ardour/session.h"
38 #include "ardour/tempo.h"
39 #include "ardour/types.h"
45 using namespace ARDOUR;
49 namespace Properties {
50 PBD::PropertyDescriptor<void*> midi_data;
51 PBD::PropertyDescriptor<Evoral::MusicalTime> start_beats;
52 PBD::PropertyDescriptor<Evoral::MusicalTime> length_beats;
57 MidiRegion::make_property_quarks ()
59 Properties::midi_data.property_id = g_quark_from_static_string (X_("midi-data"));
60 DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for midi-data = %1\n", Properties::midi_data.property_id));
61 Properties::start_beats.property_id = g_quark_from_static_string (X_("start-beats"));
62 DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for start-beats = %1\n", Properties::start_beats.property_id));
63 Properties::length_beats.property_id = g_quark_from_static_string (X_("length-beats"));
64 DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for length-beats = %1\n", Properties::length_beats.property_id));
68 MidiRegion::register_properties ()
70 add_property (_start_beats);
71 add_property (_length_beats);
74 /* Basic MidiRegion constructor (many channels) */
75 MidiRegion::MidiRegion (const SourceList& srcs)
77 , _start_beats (Properties::start_beats, 0)
78 , _length_beats (Properties::length_beats, midi_source(0)->length_beats())
80 register_properties ();
82 midi_source(0)->ModelChanged.connect_same_thread (_source_connection, boost::bind (&MidiRegion::model_changed, this));
84 assert(_name.val().find("/") == string::npos);
85 assert(_type == DataType::MIDI);
88 MidiRegion::MidiRegion (boost::shared_ptr<const MidiRegion> other)
90 , _start_beats (Properties::start_beats, other->_start_beats)
91 , _length_beats (Properties::length_beats, (Evoral::MusicalTime) 0)
93 update_length_beats ();
94 register_properties ();
96 assert(_name.val().find("/") == string::npos);
97 midi_source(0)->ModelChanged.connect_same_thread (_source_connection, boost::bind (&MidiRegion::model_changed, this));
101 /** Create a new MidiRegion that is part of an existing one */
102 MidiRegion::MidiRegion (boost::shared_ptr<const MidiRegion> other, frameoffset_t offset)
103 : Region (other, offset)
104 , _start_beats (Properties::start_beats, (Evoral::MusicalTime) 0)
105 , _length_beats (Properties::length_beats, (Evoral::MusicalTime) 0)
107 BeatsFramesConverter bfc (_session.tempo_map(), _position);
108 Evoral::MusicalTime const offset_beats = bfc.from (offset);
110 _start_beats = other->_start_beats + offset_beats;
111 _length_beats = other->_length_beats - offset_beats;
113 register_properties ();
115 assert(_name.val().find("/") == string::npos);
116 midi_source(0)->ModelChanged.connect_same_thread (_source_connection, boost::bind (&MidiRegion::model_changed, this));
120 MidiRegion::~MidiRegion ()
124 /** Create a new MidiRegion that has its own version of some/all of the Source used by another.
126 boost::shared_ptr<MidiRegion>
127 MidiRegion::clone (string path) const
129 BeatsFramesConverter bfc (_session.tempo_map(), _position);
130 Evoral::MusicalTime const bbegin = bfc.from (_start);
131 Evoral::MusicalTime const bend = bfc.from (_start + _length);
133 boost::shared_ptr<MidiSource> ms = midi_source(0)->clone (path, bbegin, bend);
137 plist.add (Properties::name, ms->name());
138 plist.add (Properties::whole_file, true);
139 plist.add (Properties::start, _start);
140 plist.add (Properties::start_beats, _start_beats);
141 plist.add (Properties::length, _length);
142 plist.add (Properties::length_beats, _length_beats);
143 plist.add (Properties::layer, 0);
145 return boost::dynamic_pointer_cast<MidiRegion> (RegionFactory::create (ms, plist, true));
149 MidiRegion::post_set (const PropertyChange& pc)
151 Region::post_set (pc);
153 if (pc.contains (Properties::length) && !pc.contains (Properties::length_beats)) {
154 update_length_beats ();
155 } else if (pc.contains (Properties::start) && !pc.contains (Properties::start_beats)) {
156 set_start_beats_from_start_frames ();
161 MidiRegion::set_start_beats_from_start_frames ()
163 BeatsFramesConverter c (_session.tempo_map(), _position - _start);
164 _start_beats = c.from (_start);
168 MidiRegion::set_length_internal (framecnt_t len)
170 Region::set_length_internal (len);
171 update_length_beats ();
175 MidiRegion::update_after_tempo_map_change ()
177 Region::update_after_tempo_map_change ();
179 /* _position has now been updated for the new tempo map */
180 _start = _position - _session.tempo_map().framepos_minus_beats (_position, _start_beats);
182 send_change (Properties::start);
186 MidiRegion::update_length_beats ()
188 BeatsFramesConverter converter (_session.tempo_map(), _position);
189 _length_beats = converter.from (_length);
193 MidiRegion::set_position_internal (framepos_t pos, bool allow_bbt_recompute)
195 Region::set_position_internal (pos, allow_bbt_recompute);
196 /* zero length regions don't exist - so if _length_beats is zero, this object
197 is under construction.
200 /* leave _length_beats alone, and change _length to reflect the state of things
201 at the new position (tempo map may dictate a different number of frames
203 BeatsFramesConverter converter (_session.tempo_map(), _position);
204 Region::set_length_internal (converter.to (_length_beats));
209 MidiRegion::read_at (Evoral::EventSink<framepos_t>& out, framepos_t position, framecnt_t dur, uint32_t chan_n, NoteMode mode, MidiStateTracker* tracker) const
211 return _read_at (_sources, out, position, dur, chan_n, mode, tracker);
215 MidiRegion::master_read_at (MidiRingBuffer<framepos_t>& out, framepos_t position, framecnt_t dur, uint32_t chan_n, NoteMode mode) const
217 return _read_at (_master_sources, out, position, dur, chan_n, mode); /* no tracker */
221 MidiRegion::_read_at (const SourceList& /*srcs*/, Evoral::EventSink<framepos_t>& dst, framepos_t position, framecnt_t dur, uint32_t chan_n,
222 NoteMode mode, MidiStateTracker* tracker) const
224 frameoffset_t internal_offset = 0;
225 framecnt_t to_read = 0;
227 /* precondition: caller has verified that we cover the desired section */
232 return 0; /* read nothing */
235 if (position < _position) {
236 /* we are starting the read from before the start of the region */
238 dur -= _position - position;
240 /* we are starting the read from after the start of the region */
241 internal_offset = position - _position;
244 if (internal_offset >= _length) {
245 return 0; /* read nothing */
248 if ((to_read = min (dur, _length - internal_offset)) == 0) {
249 return 0; /* read nothing */
252 boost::shared_ptr<MidiSource> src = midi_source(chan_n);
253 src->set_note_mode(mode);
256 cerr << "MR " << name () << " read @ " << position << " * " << to_read
257 << " _position = " << _position
258 << " _start = " << _start
259 << " intoffset = " << internal_offset
263 /* This call reads events from a source and writes them to `dst' timed in session frames */
266 dst, // destination buffer
267 _position - _start, // start position of the source in session frames
268 _start + internal_offset, // where to start reading in the source
269 to_read, // read duration in frames
273 return 0; /* "read nothing" */
282 return Region::state ();
286 MidiRegion::set_state (const XMLNode& node, int version)
288 int ret = Region::set_state (node, version);
291 update_length_beats ();
298 MidiRegion::recompute_at_end ()
300 /* our length has changed
301 * so what? stuck notes are dealt with via a note state tracker
306 MidiRegion::recompute_at_start ()
308 /* as above, but the shift was from the front
309 * maybe bump currently active note's note-ons up so they sound here?
310 * that could be undesireable in certain situations though.. maybe
311 * remove the note entirely, including it's note off? something needs to
312 * be done to keep the played MIDI sane to avoid messing up voices of
313 * polyhonic things etc........
318 MidiRegion::separate_by_channel (ARDOUR::Session&, vector< boost::shared_ptr<Region> >&) const
324 boost::shared_ptr<Evoral::Control>
325 MidiRegion::control (const Evoral::Parameter& id, bool create)
327 return model()->control(id, create);
330 boost::shared_ptr<const Evoral::Control>
331 MidiRegion::control (const Evoral::Parameter& id) const
333 return model()->control(id);
336 boost::shared_ptr<MidiModel>
339 return midi_source()->model();
342 boost::shared_ptr<const MidiModel>
343 MidiRegion::model() const
345 return midi_source()->model();
348 boost::shared_ptr<MidiSource>
349 MidiRegion::midi_source (uint32_t n) const
351 // Guaranteed to succeed (use a static cast?)
352 return boost::dynamic_pointer_cast<MidiSource>(source(n));
356 MidiRegion::model_changed ()
362 /* build list of filtered Parameters, being those whose automation state is not `Play' */
364 _filtered_parameters.clear ();
366 Automatable::Controls const & c = model()->controls();
368 for (Automatable::Controls::const_iterator i = c.begin(); i != c.end(); ++i) {
369 boost::shared_ptr<AutomationControl> ac = boost::dynamic_pointer_cast<AutomationControl> (i->second);
371 if (ac->alist()->automation_state() != Play) {
372 _filtered_parameters.insert (ac->parameter ());
376 /* watch for changes to controls' AutoState */
377 midi_source()->AutomationStateChanged.connect_same_thread (
378 _model_connection, boost::bind (&MidiRegion::model_automation_state_changed, this, _1)
381 model()->ContentsChanged.connect_same_thread (
382 _model_contents_connection, boost::bind (&MidiRegion::model_contents_changed, this));
386 MidiRegion::model_contents_changed ()
388 send_change (PropertyChange (Properties::midi_data));
392 MidiRegion::model_automation_state_changed (Evoral::Parameter const & p)
394 /* Update our filtered parameters list after a change to a parameter's AutoState */
396 boost::shared_ptr<AutomationControl> ac = model()->automation_control (p);
399 if (ac->alist()->automation_state() == Play) {
400 _filtered_parameters.erase (p);
402 _filtered_parameters.insert (p);
405 /* the source will have an iterator into the model, and that iterator will have been set up
406 for a given set of filtered_parameters, so now that we've changed that list we must invalidate
409 Glib::Mutex::Lock lm (midi_source(0)->mutex());
410 midi_source(0)->invalidate ();
413 /** This is called when a trim drag has resulted in a -ve _start time for this region.
414 * Fix it up by adding some empty space to the source.
417 MidiRegion::fix_negative_start ()
419 BeatsFramesConverter c (_session.tempo_map(), _position);
421 model()->insert_silence_at_start (c.from (-_start));
426 /** Transpose the notes in this region by a given number of semitones */
428 MidiRegion::transpose (int semitones)
430 BeatsFramesConverter c (_session.tempo_map(), _start);
431 model()->transpose (c.from (_start), c.from (_start + _length), semitones);
435 MidiRegion::set_start_internal (framecnt_t s)
437 Region::set_start_internal (s);
438 set_start_beats_from_start_frames ();