2 Copyright (C) 1998-2006 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.
25 #include "pbd/error.h"
26 #include "pbd/controllable_descriptor.h"
27 #include "pbd/xml++.h"
28 #include "pbd/stacktrace.h"
30 #include "midi++/port.h"
31 #include "midi++/channel.h"
33 #include "ardour/automation_control.h"
34 #include "ardour/midi_ui.h"
35 #include "ardour/utils.h"
37 #include "midicontrollable.h"
38 #include "generic_midi_control_protocol.h"
43 using namespace ARDOUR;
45 MIDIControllable::MIDIControllable (GenericMidiControlProtocol* s, Port& p, bool m)
52 _learned = false; /* from URI */
54 last_value = 0; // got a better idea ?
55 last_controllable_value = 0.0f;
57 _control_description = "MIDI Control: none";
58 control_additional = (byte) -1;
59 feedback = true; // for now
62 MIDIControllable::MIDIControllable (GenericMidiControlProtocol* s, Port& p, Controllable& c, bool m)
68 set_controllable (&c);
70 _learned = true; /* from controllable */
72 last_value = 0; // got a better idea ?
73 last_controllable_value = 0.0f;
75 _control_description = "MIDI Control: none";
76 control_additional = (byte) -1;
77 feedback = true; // for now
80 MIDIControllable::~MIDIControllable ()
82 drop_external_control ();
86 MIDIControllable::init (const std::string& s)
90 _descriptor = new ControllableDescriptor;
91 return _descriptor->set (s);
95 MIDIControllable::midi_forget ()
97 /* stop listening for incoming messages, but retain
98 our existing event + type information.
101 midi_sense_connection[0].disconnect ();
102 midi_sense_connection[1].disconnect ();
103 midi_learn_connection.disconnect ();
107 MIDIControllable::drop_external_control ()
111 control_additional = (byte) -1;
115 MIDIControllable::set_controllable (Controllable* c)
117 if (c == controllable) {
121 controllable_death_connection.disconnect ();
126 last_controllable_value = controllable->get_value();
128 last_controllable_value = 0.0f; // is there a better value?
132 controllable->Destroyed.connect (controllable_death_connection, MISSING_INVALIDATOR,
133 boost::bind (&MIDIControllable::drop_controllable, this),
134 MidiControlUI::instance());
139 MIDIControllable::midi_rebind (channel_t c)
142 bind_midi (c, control_type, control_additional);
149 MIDIControllable::learn_about_external_control ()
151 drop_external_control ();
152 _port.parser()->any.connect_same_thread (midi_learn_connection, boost::bind (&MIDIControllable::midi_receiver, this, _1, _2, _3));
156 MIDIControllable::stop_learning ()
158 midi_learn_connection.disconnect ();
162 MIDIControllable::control_to_midi (float val)
164 if (controllable->is_gain_like()) {
165 return gain_to_slider_position (val) * max_value_for_type ();
168 float control_min = controllable->lower ();
169 float control_max = controllable->upper ();
170 const float control_range = control_max - control_min;
172 if (controllable->is_toggle()) {
173 if (val >= (control_min + (control_range/2.0f))) {
174 return max_value_for_type();
180 return (val - control_min) / control_range * max_value_for_type ();
184 MIDIControllable::midi_to_control (int val)
186 /* fiddle with MIDI value so that we get an odd number of integer steps
187 and can thus represent "middle" precisely as 0.5. this maps to
191 float fv = (val == 0 ? 0 : float (val - 1) / (max_value_for_type() - 1));
193 if (controllable->is_gain_like()) {
194 return slider_position_to_gain (fv);
197 float control_min = controllable->lower ();
198 float control_max = controllable->upper ();
199 const float control_range = control_max - control_min;
201 return (fv * control_range) + control_min;
205 MIDIControllable::midi_sense_note_on (Parser &p, EventTwoBytes *tb)
207 midi_sense_note (p, tb, true);
211 MIDIControllable::midi_sense_note_off (Parser &p, EventTwoBytes *tb)
213 midi_sense_note (p, tb, false);
217 MIDIControllable::lookup_controllable()
223 boost::shared_ptr<Controllable> c = _surface->lookup_controllable (*_descriptor);
229 set_controllable (c.get ());
235 MIDIControllable::drop_controllable ()
237 set_controllable (0);
241 MIDIControllable::midi_sense_note (Parser &, EventTwoBytes *msg, bool /*is_on*/)
244 if (lookup_controllable()) {
249 if (!controllable->is_toggle()) {
250 if (control_additional == msg->note_number) {
251 controllable->set_value (midi_to_control (msg->velocity));
254 if (control_additional == msg->note_number) {
255 controllable->set_value (controllable->get_value() > 0.5f ? 0.0f : 1.0f);
259 last_value = (MIDI::byte) (controllable->get_value() * 127.0); // to prevent feedback fights
263 MIDIControllable::midi_sense_controller (Parser &, EventTwoBytes *msg)
266 if (lookup_controllable ()) {
271 assert (controllable);
273 if (controllable->touching()) {
274 return; // to prevent feedback fights when e.g. dragging a UI slider
277 if (control_additional == msg->controller_number) {
279 if (!controllable->is_toggle()) {
281 float new_value = msg->value;
282 float max_value = max(last_controllable_value, new_value);
283 float min_value = min(last_controllable_value, new_value);
284 float range = max_value - min_value;
285 float threshold = (float) _surface->threshold ();
287 bool const in_sync = (
289 controllable->get_value() <= midi_to_control(max_value) &&
290 controllable->get_value() >= midi_to_control(min_value)
293 /* If the surface is not motorised, we try to prevent jumps when
294 the MIDI controller and controllable are out of sync.
295 There might be a better way of doing this.
298 if (in_sync || _surface->motorised ()) {
299 controllable->set_value (midi_to_control (new_value));
302 last_controllable_value = new_value;
304 if (msg->value > 64.0f) {
305 controllable->set_value (1);
307 controllable->set_value (0);
311 last_value = (MIDI::byte) (control_to_midi(controllable->get_value())); // to prevent feedback fights
316 MIDIControllable::midi_sense_program_change (Parser &, byte msg)
319 if (lookup_controllable ()) {
324 if (!controllable->is_toggle()) {
325 controllable->set_value (midi_to_control (msg));
326 } else if (msg == control_additional) {
327 controllable->set_value (controllable->get_value() > 0.5f ? 0.0f : 1.0f);
330 last_value = (MIDI::byte) (controllable->get_value() * 127.0); // to prevent feedback fights
334 MIDIControllable::midi_sense_pitchbend (Parser &, pitchbend_t pb)
337 if (lookup_controllable ()) {
342 if (!controllable->is_toggle()) {
343 controllable->set_value (midi_to_control (pb));
345 controllable->set_value (controllable->get_value() > 0.5f ? 0.0f : 1.0f);
348 last_value = control_to_midi (controllable->get_value ());
352 MIDIControllable::midi_receiver (Parser &, byte *msg, size_t /*len*/)
354 /* we only respond to channel messages */
356 if ((msg[0] & 0xF0) < 0x80 || (msg[0] & 0xF0) > 0xE0) {
360 /* if the our port doesn't do input anymore, forget it ... */
362 if (!_port.parser()) {
366 bind_midi ((channel_t) (msg[0] & 0xf), eventType (msg[0] & 0xF0), msg[1]);
369 controllable->LearningFinished ();
374 MIDIControllable::bind_midi (channel_t chn, eventType ev, MIDI::byte additional)
378 drop_external_control ();
381 control_channel = chn;
382 control_additional = additional;
384 if (_port.parser() == 0) {
388 Parser& p = *_port.parser();
393 p.channel_note_off[chn_i].connect_same_thread (midi_sense_connection[0], boost::bind (&MIDIControllable::midi_sense_note_off, this, _1, _2));
395 /* if this is a togglee, connect to noteOn as well,
396 and we'll toggle back and forth between the two.
400 p.channel_note_on[chn_i].connect_same_thread (midi_sense_connection[1], boost::bind (&MIDIControllable::midi_sense_note_on, this, _1, _2));
403 _control_description = "MIDI control: NoteOff";
407 p.channel_note_on[chn_i].connect_same_thread (midi_sense_connection[0], boost::bind (&MIDIControllable::midi_sense_note_on, this, _1, _2));
409 p.channel_note_off[chn_i].connect_same_thread (midi_sense_connection[1], boost::bind (&MIDIControllable::midi_sense_note_off, this, _1, _2));
411 _control_description = "MIDI control: NoteOn";
414 case MIDI::controller:
415 p.channel_controller[chn_i].connect_same_thread (midi_sense_connection[0], boost::bind (&MIDIControllable::midi_sense_controller, this, _1, _2));
416 snprintf (buf, sizeof (buf), "MIDI control: Controller %d", control_additional);
417 _control_description = buf;
421 p.channel_program_change[chn_i].connect_same_thread (midi_sense_connection[0], boost::bind (&MIDIControllable::midi_sense_program_change, this, _1, _2));
422 _control_description = "MIDI control: ProgramChange";
425 case MIDI::pitchbend:
426 p.channel_pitchbend[chn_i].connect_same_thread (midi_sense_connection[0], boost::bind (&MIDIControllable::midi_sense_pitchbend, this, _1, _2));
427 _control_description = "MIDI control: Pitchbend";
436 MIDIControllable::write_feedback (MIDI::byte* buf, int32_t& bufsize, bool /*force*/)
438 if (!controllable || control_type == none || !feedback || bufsize <= 2) {
442 int const gm = control_to_midi (controllable->get_value());
444 if (gm == last_value) {
448 *buf++ = (0xF0 & control_type) | (0xF & control_channel);
450 switch (control_type) {
451 case MIDI::pitchbend:
452 *buf++ = int (gm) & 127;
453 *buf++ = (int (gm) >> 7) & 127;
456 *buf++ = control_additional; /* controller number */
468 MIDIControllable::set_state (const XMLNode& node, int /*version*/)
470 const XMLProperty* prop;
473 if ((prop = node.property ("event")) != 0) {
474 sscanf (prop->value().c_str(), "0x%x", &xx);
475 control_type = (MIDI::eventType) xx;
480 if ((prop = node.property ("channel")) != 0) {
481 sscanf (prop->value().c_str(), "%d", &xx);
482 control_channel = (MIDI::channel_t) xx;
487 if ((prop = node.property ("additional")) != 0) {
488 sscanf (prop->value().c_str(), "0x%x", &xx);
489 control_additional = (MIDI::byte) xx;
494 if ((prop = node.property ("feedback")) != 0) {
495 feedback = (prop->value() == "yes");
497 feedback = true; // default
500 bind_midi (control_channel, control_type, control_additional);
506 MIDIControllable::get_state ()
510 XMLNode* node = new XMLNode ("MIDIControllable");
512 if (_current_uri.empty()) {
513 node->add_property ("id", controllable->id().to_s());
515 node->add_property ("uri", _current_uri);
519 snprintf (buf, sizeof(buf), "0x%x", (int) control_type);
520 node->add_property ("event", buf);
521 snprintf (buf, sizeof(buf), "%d", (int) control_channel);
522 node->add_property ("channel", buf);
523 snprintf (buf, sizeof(buf), "0x%x", (int) control_additional);
524 node->add_property ("additional", buf);
525 node->add_property ("feedback", (feedback ? "yes" : "no"));
531 /** @return the maximum value for a control value transmitted
532 * using a given MIDI::eventType.
535 MIDIControllable::max_value_for_type () const
537 /* XXX: this is not complete */
539 if (control_type == MIDI::pitchbend) {