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/basename.h"
30 #include "pbd/xml++.h"
31 #include "pbd/enumwriter.h"
33 #include "ardour/midi_region.h"
34 #include "ardour/session.h"
35 #include "ardour/gain.h"
36 #include "ardour/dB.h"
37 #include "ardour/playlist.h"
38 #include "ardour/midi_source.h"
39 #include "ardour/region_factory.h"
40 #include "ardour/types.h"
41 #include "ardour/midi_ring_buffer.h"
47 using namespace ARDOUR;
50 /* Basic MidiRegion constructor (many channels) */
51 MidiRegion::MidiRegion (const SourceList& srcs)
54 // midi_source(0)->Switched.connect_same_thread (*this, boost::bind (&MidiRegion::switch_source, this, _1));
55 midi_source(0)->ModelChanged.connect_same_thread (_source_connection, boost::bind (&MidiRegion::model_changed, this));
57 assert(_name.val().find("/") == string::npos);
58 assert(_type == DataType::MIDI);
61 /** Create a new MidiRegion, that is part of an existing one */
62 MidiRegion::MidiRegion (boost::shared_ptr<const MidiRegion> other, frameoffset_t offset, bool offset_relative)
63 : Region (other, offset, offset_relative)
65 assert(_name.val().find("/") == string::npos);
66 // midi_source(0)->Switched.connect_same_thread (*this, boost::bind (&MidiRegion::switch_source, this, _1));
67 midi_source(0)->ModelChanged.connect_same_thread (_source_connection, boost::bind (&MidiRegion::model_changed, this));
71 MidiRegion::~MidiRegion ()
75 /** Create a new MidiRegion that has its own version of some/all of the Source used by another.
77 boost::shared_ptr<MidiRegion>
80 BeatsFramesConverter bfc (_session.tempo_map(), _position);
81 double bbegin = bfc.from (_position);
82 double bend = bfc.from (last_frame() + 1);
84 boost::shared_ptr<MidiSource> ms = midi_source(0)->clone (bbegin, bend);
88 plist.add (Properties::name, ms->name());
89 plist.add (Properties::whole_file, true);
90 plist.add (Properties::start, 0);
91 plist.add (Properties::length, _length);
92 plist.add (Properties::layer, 0);
94 return boost::dynamic_pointer_cast<MidiRegion> (RegionFactory::create (ms, plist, true));
98 MidiRegion::set_position_internal (framepos_t pos, bool allow_bbt_recompute)
100 BeatsFramesConverter old_converter(_session.tempo_map(), _position - _start);
101 double length_beats = old_converter.from(_length);
103 Region::set_position_internal(pos, allow_bbt_recompute);
105 BeatsFramesConverter new_converter(_session.tempo_map(), pos - _start);
107 set_length(new_converter.to(length_beats), 0);
111 MidiRegion::read_at (Evoral::EventSink<nframes_t>& out, framepos_t position, framecnt_t dur, uint32_t chan_n, NoteMode mode, MidiStateTracker* tracker) const
113 return _read_at (_sources, out, position, dur, chan_n, mode, tracker);
117 MidiRegion::master_read_at (MidiRingBuffer<nframes_t>& out, framepos_t position, framecnt_t dur, uint32_t chan_n, NoteMode mode) const
119 return _read_at (_master_sources, out, position, dur, chan_n, mode); /* no tracker */
123 MidiRegion::_read_at (const SourceList& /*srcs*/, Evoral::EventSink<nframes_t>& dst, framepos_t position, framecnt_t dur, uint32_t chan_n,
124 NoteMode mode, MidiStateTracker* tracker) const
126 frameoffset_t internal_offset = 0;
127 framecnt_t to_read = 0;
129 /* precondition: caller has verified that we cover the desired section */
134 return 0; /* read nothing */
137 if (position < _position) {
138 /* we are starting the read from before the start of the region */
140 dur -= _position - position;
142 /* we are starting the read from after the start of the region */
143 internal_offset = position - _position;
146 if (internal_offset >= _length) {
147 return 0; /* read nothing */
150 if ((to_read = min (dur, _length - internal_offset)) == 0) {
151 return 0; /* read nothing */
154 _read_data_count = 0;
156 boost::shared_ptr<MidiSource> src = midi_source(chan_n);
157 src->set_note_mode(mode);
159 /*cerr << "MR read @ " << position << " * " << to_read
160 << " _position = " << _position
161 << " _start = " << _start
162 << " offset = " << output_buffer_position
163 << " intoffset = " << internal_offset
166 /* This call reads events from a source and writes them to `dst' timed in session frames */
169 dst, // destination buffer
170 _position - _start, // start position of the source in session frames
171 _start + internal_offset, // where to start reading in the source
172 to_read, // read duration in frames
176 return 0; /* "read nothing" */
179 _read_data_count += src->read_data_count();
187 return Region::state ();
191 MidiRegion::set_state (const XMLNode& node, int version)
193 return Region::set_state (node, version);
197 MidiRegion::recompute_at_end ()
199 /* our length has changed
200 * so what? stuck notes are dealt with via a note state tracker
205 MidiRegion::recompute_at_start ()
207 /* as above, but the shift was from the front
208 * maybe bump currently active note's note-ons up so they sound here?
209 * that could be undesireable in certain situations though.. maybe
210 * remove the note entirely, including it's note off? something needs to
211 * be done to keep the played MIDI sane to avoid messing up voices of
212 * polyhonic things etc........
217 MidiRegion::separate_by_channel (ARDOUR::Session&, vector< boost::shared_ptr<Region> >&) const
224 MidiRegion::exportme (ARDOUR::Session&, ARDOUR::ExportSpecification&)
229 boost::shared_ptr<MidiSource>
230 MidiRegion::midi_source (uint32_t n) const
232 // Guaranteed to succeed (use a static cast?)
233 return boost::dynamic_pointer_cast<MidiSource>(source(n));
238 MidiRegion::switch_source(boost::shared_ptr<Source> src)
240 _source_connection.disconnect ();
242 boost::shared_ptr<MidiSource> msrc = boost::dynamic_pointer_cast<MidiSource>(src);
247 // MIDI regions have only one source
249 srcs.push_back (msrc);
254 set_name (msrc->name());
256 msrc->ModelChanged.connect_same_thread (_source_connection, boost::bind (&MidiRegion::model_changed, this));
260 MidiRegion::model_changed ()
266 /* build list of filtered Parameters, being those whose automation state is not `Play' */
268 _filtered_parameters.clear ();
270 Automatable::Controls const & c = model()->controls();
272 for (Automatable::Controls::const_iterator i = c.begin(); i != c.end(); ++i) {
273 boost::shared_ptr<AutomationControl> ac = boost::dynamic_pointer_cast<AutomationControl> (i->second);
275 if (ac->alist()->automation_state() != Play) {
276 _filtered_parameters.insert (ac->parameter ());
280 /* watch for changes to controls' AutoState */
281 midi_source()->AutomationStateChanged.connect_same_thread (
282 _model_connection, boost::bind (&MidiRegion::model_automation_state_changed, this, _1)
287 MidiRegion::model_automation_state_changed (Evoral::Parameter const & p)
289 /* Update our filtered parameters list after a change to a parameter's AutoState */
291 boost::shared_ptr<AutomationControl> ac = model()->automation_control (p);
294 if (ac->alist()->automation_state() == Play) {
295 _filtered_parameters.erase (p);
297 _filtered_parameters.insert (p);
300 /* the source will have an iterator into the model, and that iterator will have been set up
301 for a given set of filtered_paramters, so now that we've changed that list we must invalidate
304 Glib::Mutex::Lock lm (midi_source(0)->mutex());
305 midi_source(0)->invalidate ();