MIDI region forking, plus Playlist::regions_to_read() fix forward ported from 2.X...
[ardour.git] / libs / ardour / midi_source.cc
1 /*
2     Copyright (C) 2006 Paul Davis
3         Written by Dave Robillard, 2006
4
5     This program is free software; you can redistribute it and/or modify
6     it under the terms of the GNU General Public License as published by
7     the Free Software Foundation; either version 2 of the License, or
8     (at your option) any later version.
9
10     This program is distributed in the hope that it will be useful,
11     but WITHOUT ANY WARRANTY; without even the implied warranty of
12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13     GNU General Public License for more details.
14
15     You should have received a copy of the GNU General Public License
16     along with this program; if not, write to the Free Software
17     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18 */
19
20 #include <sys/stat.h>
21 #include <unistd.h>
22 #include <fcntl.h>
23 #include <poll.h>
24 #include <float.h>
25 #include <cerrno>
26 #include <ctime>
27 #include <cmath>
28 #include <iomanip>
29 #include <algorithm>
30
31 #include <glibmm/fileutils.h>
32
33 #include "pbd/xml++.h"
34 #include "pbd/pthread_utils.h"
35 #include "pbd/basename.h"
36
37 #include "ardour/audioengine.h"
38 #include "ardour/debug.h"
39 #include "ardour/midi_model.h"
40 #include "ardour/midi_ring_buffer.h"
41 #include "ardour/midi_state_tracker.h"
42 #include "ardour/midi_source.h"
43 #include "ardour/session.h"
44 #include "ardour/session_directory.h"
45 #include "ardour/source_factory.h"
46 #include "ardour/tempo.h"
47
48 #include "i18n.h"
49
50 using namespace std;
51 using namespace ARDOUR;
52 using namespace PBD;
53
54 PBD::Signal1<void,MidiSource*> MidiSource::MidiSourceCreated;
55
56 MidiSource::MidiSource (Session& s, string name, Source::Flag flags)
57         : Source(s, DataType::MIDI, name, flags)
58         , _read_data_count(0)
59         , _write_data_count(0)
60         , _writing(false)
61         , _model_iter_valid(false)
62         , _length_beats(0.0)
63         , _last_read_end(0)
64         , _last_write_end(0)
65 {
66 }
67
68 MidiSource::MidiSource (Session& s, const XMLNode& node)
69         : Source(s, node)
70         , _read_data_count(0)
71         , _write_data_count(0)
72         , _writing(false)
73         , _model_iter_valid(false)
74         , _length_beats(0.0)
75         , _last_read_end(0)
76         , _last_write_end(0)
77 {
78         _read_data_count = 0;
79         _write_data_count = 0;
80
81         if (set_state (node, Stateful::loading_state_version)) {
82                 throw failed_constructor();
83         }
84 }
85
86
87 MidiSource::~MidiSource ()
88 {
89 }
90
91 XMLNode&
92 MidiSource::get_state ()
93 {
94         XMLNode& node (Source::get_state());
95
96         if (_captured_for.length()) {
97                 node.add_property ("captured-for", _captured_for);
98         }
99
100         return node;
101 }
102
103 int
104 MidiSource::set_state (const XMLNode& node, int /*version*/)
105 {
106         const XMLProperty* prop;
107
108         if ((prop = node.property ("captured-for")) != 0) {
109                 _captured_for = prop->value();
110         }
111
112         return 0;
113 }
114
115 sframes_t
116 MidiSource::length (sframes_t pos) const
117 {
118         BeatsFramesConverter converter(_session.tempo_map(), pos);
119         return converter.to(_length_beats);
120 }
121
122 void
123 MidiSource::update_length (sframes_t /*pos*/, sframes_t /*cnt*/)
124 {
125         // You're not the boss of me!
126 }
127
128 void
129 MidiSource::invalidate ()
130 {
131         _model_iter_valid = false;
132         _model_iter.invalidate();
133 }
134
135 nframes_t
136 MidiSource::midi_read (Evoral::EventSink<nframes_t>& dst, sframes_t source_start,
137                        sframes_t start, nframes_t cnt,
138                        sframes_t stamp_offset, sframes_t negative_stamp_offset,
139                        MidiStateTracker* tracker) const
140 {
141         Glib::Mutex::Lock lm (_lock);
142
143         BeatsFramesConverter converter(_session.tempo_map(), source_start);
144
145         if (_model) {
146                 Evoral::Sequence<double>::const_iterator& i = _model_iter;
147
148                 // If the cached iterator is invalid, search for the first event past start
149                 if (_last_read_end == 0 || start != _last_read_end || !_model_iter_valid) {
150                         DEBUG_TRACE (DEBUG::MidiSourceIO, string_compose ("*** %1 search for relevant iterator for %1 / %2\n", _name, source_start, start));
151                         for (i = _model->begin(); i != _model->end(); ++i) {
152                                 if (converter.to(i->time()) >= start) {
153                                         break;
154                                 }
155                         }
156                         _model_iter_valid = true;
157                 } else {
158                         DEBUG_TRACE (DEBUG::MidiSourceIO, string_compose ("*** %1 use cached iterator for %1 / %2\n", _name, source_start, start));
159                 }
160
161                 _last_read_end = start + cnt;
162
163                 // Read events up to end
164                 for (; i != _model->end(); ++i) {
165                         const sframes_t time_frames = converter.to(i->time());
166                         if (time_frames < start + cnt) {
167                                 dst.write(time_frames + stamp_offset - negative_stamp_offset,
168                                                 i->event_type(), i->size(), i->buffer());
169                                 if (tracker) {
170                                         Evoral::MIDIEvent<Evoral::MusicalTime>& ev (*(Evoral::MIDIEvent<Evoral::MusicalTime>*) (&(*i)));
171                                         if (ev.is_note_on()) {
172                                                 DEBUG_TRACE (DEBUG::MidiSourceIO, string_compose ("\t%1 add note on %2 @ %3\n", _name, ev.note(), time_frames));
173                                                 tracker->add (ev.note(), ev.channel());
174                                         } else if (ev.is_note_off()) {
175                                                 DEBUG_TRACE (DEBUG::MidiSourceIO, string_compose ("\t%1 add note off %2 @ %3\n", _name, ev.note(), time_frames));
176                                                 tracker->remove (ev.note(), ev.channel());
177                                         }
178                                 }
179                         } else {
180                                 break;
181                         }
182                 }
183                 return cnt;
184         } else {
185                 return read_unlocked (dst, source_start, start, cnt, stamp_offset, negative_stamp_offset, tracker);
186         }
187 }
188
189 nframes_t
190 MidiSource::midi_write (MidiRingBuffer<nframes_t>& source, sframes_t source_start, nframes_t duration)
191 {
192         Glib::Mutex::Lock lm (_lock);
193         const nframes_t ret = write_unlocked (source, source_start, duration);
194         _last_write_end += duration;
195         return ret;
196 }
197
198 void
199 MidiSource::mark_streaming_midi_write_started (NoteMode mode, sframes_t start_frame)
200 {
201         set_timeline_position(start_frame);
202
203         if (_model) {
204                 _model->set_note_mode(mode);
205                 _model->start_write();
206         }
207
208         _last_write_end = start_frame;
209         _writing = true;
210 }
211
212 void
213 MidiSource::mark_streaming_write_started ()
214 {
215         NoteMode note_mode = _model ? _model->note_mode() : Sustained;
216         mark_streaming_midi_write_started(note_mode, _session.transport_frame());
217 }
218
219 void
220 MidiSource::mark_streaming_write_completed ()
221 {
222         if (_model) {
223                 _model->end_write(false);
224         }
225
226         _writing = false;
227 }
228
229 boost::shared_ptr<MidiSource>
230 MidiSource::clone (Evoral::MusicalTime begin, Evoral::MusicalTime end)
231 {
232         string newname = PBD::basename_nosuffix(_name.val());
233         string newpath;
234
235         /* get a new name for the MIDI file we're going to write to
236          */
237
238         do { 
239
240                 newname = bump_name_once (newname, '-');
241                 /* XXX build path safely */
242                 newpath = _session.session_directory().midi_path().to_string() +"/"+ newname + ".mid";
243
244         } while (Glib::file_test (newpath, Glib::FILE_TEST_EXISTS));
245         
246         boost::shared_ptr<MidiSource> newsrc = boost::dynamic_pointer_cast<MidiSource>(
247                 SourceFactory::createWritable(DataType::MIDI, _session,
248                                               newpath, false, _session.frame_rate()));
249         
250         newsrc->set_timeline_position(_timeline_position);
251
252         if (_model) {
253                 _model->write_to (newsrc, begin, end);
254         } else {
255                 error << string_compose (_("programming error: %1"), X_("no model for MidiSource during ::clone()"));
256                 return boost::shared_ptr<MidiSource>();
257         }
258
259         newsrc->flush_midi();
260
261         /* force a reload of the model if the range is partial */
262         
263         if (begin != Evoral::MinMusicalTime || end != Evoral::MaxMusicalTime) {
264                 newsrc->load_model (true, true);
265         }
266         
267         return newsrc;
268 }
269
270 void
271 MidiSource::session_saved()
272 {
273         flush_midi();
274
275         if (_model && _model->edited()) {
276                 boost::shared_ptr<MidiSource> newsrc = clone ();
277
278                 if (newsrc) {
279                         _model->set_midi_source (newsrc.get());
280                         Switched (newsrc); /* EMIT SIGNAL */
281                 }
282         }
283 }
284
285 void
286 MidiSource::set_note_mode(NoteMode mode)
287 {
288         if (_model) {
289                 _model->set_note_mode(mode);
290         }
291 }
292