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.
20 #include <cstdio> /* for sprintf, sigh */
22 #include <pbd/error.h>
23 #include <pbd/xml++.h>
24 #include <midi++/port.h>
25 #include <midi++/channel.h>
26 #include <ardour/automation_control.h>
28 #include "midicontrollable.h"
33 using namespace ARDOUR;
35 MIDIControllable::MIDIControllable (Port& p, Controllable& c, bool is_bistate)
36 : controllable (c), _port (p), bistate (is_bistate)
39 last_value = 0; // got a better idea ?
41 _control_description = "MIDI Control: none";
42 control_additional = (byte) -1;
44 feedback = true; // for now
46 /* use channel 0 ("1") as the initial channel */
51 MIDIControllable::~MIDIControllable ()
53 drop_external_control ();
57 MIDIControllable::midi_forget ()
59 /* stop listening for incoming messages, but retain
60 our existing event + type information.
63 if (connections > 0) {
64 midi_sense_connection[0].disconnect ();
67 if (connections > 1) {
68 midi_sense_connection[1].disconnect ();
72 midi_learn_connection.disconnect ();
77 MIDIControllable::midi_rebind (channel_t c)
80 bind_midi (c, control_type, control_additional);
87 MIDIControllable::learn_about_external_control ()
89 drop_external_control ();
90 midi_learn_connection = _port.input()->any.connect (mem_fun (*this, &MIDIControllable::midi_receiver));
94 MIDIControllable::stop_learning ()
96 midi_learn_connection.disconnect ();
100 MIDIControllable::drop_external_control ()
102 if (connections > 0) {
103 midi_sense_connection[0].disconnect ();
105 if (connections > 1) {
106 midi_sense_connection[1].disconnect ();
110 midi_learn_connection.disconnect ();
113 control_additional = (byte) -1;
117 MIDIControllable::control_to_midi(float val)
119 float control_min = 0.0f;
120 float control_max = 1.0f;
121 ARDOUR::AutomationControl* ac = dynamic_cast<ARDOUR::AutomationControl*>(&controllable);
123 control_min = ac->parameter().min();
124 control_max = ac->parameter().max();
127 const float control_range = control_max - control_min;
128 const float midi_range = 127.0f; // TODO: NRPN etc.
130 return (val - control_min) / control_range * midi_range;
134 MIDIControllable::midi_to_control(float val)
136 float control_min = 0.0f;
137 float control_max = 1.0f;
138 ARDOUR::AutomationControl* ac = dynamic_cast<ARDOUR::AutomationControl*>(&controllable);
140 control_min = ac->parameter().min();
141 control_max = ac->parameter().max();
144 const float control_range = control_max - control_min;
145 const float midi_range = 127.0f; // TODO: NRPN etc.
147 return val / midi_range * control_range + control_min;
151 MIDIControllable::midi_sense_note_on (Parser &p, EventTwoBytes *tb)
153 midi_sense_note (p, tb, true);
157 MIDIControllable::midi_sense_note_off (Parser &p, EventTwoBytes *tb)
159 midi_sense_note (p, tb, false);
163 MIDIControllable::midi_sense_note (Parser &, EventTwoBytes *msg, bool is_on)
166 controllable.set_value (msg->note_number/127.0);
169 /* Note: parser handles the use of zero velocity to
170 mean note off. if we get called with is_on=true, then we
171 got a *real* note on.
174 if (msg->note_number == control_additional) {
175 controllable.set_value (is_on ? 1 : 0);
179 last_value = (MIDI::byte) (controllable.get_value() * 127.0); // to prevent feedback fights
183 MIDIControllable::midi_sense_controller (Parser &, EventTwoBytes *msg)
185 if (controllable.touching()) {
186 return; // to prevent feedback fights when e.g. dragging a UI slider
189 if (control_additional == msg->controller_number) {
191 controllable.set_value (midi_to_control(msg->value));
193 if (msg->value > 64.0) {
194 controllable.set_value (1);
196 controllable.set_value (0);
200 last_value = (MIDI::byte) (control_to_midi(controllable.get_value())); // to prevent feedback fights
205 MIDIControllable::midi_sense_program_change (Parser &, byte msg)
207 /* XXX program change messages make no sense for bistates */
210 controllable.set_value (msg/127.0);
211 last_value = (MIDI::byte) (controllable.get_value() * 127.0); // to prevent feedback fights
216 MIDIControllable::midi_sense_pitchbend (Parser &, pitchbend_t pb)
218 /* pitchbend messages make no sense for bistates */
220 /* XXX gack - get rid of assumption about typeof pitchbend_t */
222 controllable.set_value ((pb/(float) SHRT_MAX));
223 last_value = (MIDI::byte) (controllable.get_value() * 127.0); // to prevent feedback fights
227 MIDIControllable::midi_receiver (Parser &, byte *msg, size_t /*len*/)
229 /* we only respond to channel messages */
231 if ((msg[0] & 0xF0) < 0x80 || (msg[0] & 0xF0) > 0xE0) {
235 /* if the our port doesn't do input anymore, forget it ... */
237 if (!_port.input()) {
241 bind_midi ((channel_t) (msg[0] & 0xf), eventType (msg[0] & 0xF0), msg[1]);
243 controllable.LearningFinished ();
247 MIDIControllable::bind_midi (channel_t chn, eventType ev, MIDI::byte additional)
251 drop_external_control ();
254 control_channel = chn;
255 control_additional = additional;
257 if (_port.input() == 0) {
261 Parser& p = *_port.input();
266 midi_sense_connection[0] = p.channel_note_off[chn_i].connect
267 (mem_fun (*this, &MIDIControllable::midi_sense_note_off));
269 /* if this is a bistate, connect to noteOn as well,
270 and we'll toggle back and forth between the two.
274 midi_sense_connection[1] = p.channel_note_on[chn_i].connect
275 (mem_fun (*this, &MIDIControllable::midi_sense_note_on));
280 _control_description = "MIDI control: NoteOff";
284 midi_sense_connection[0] = p.channel_note_on[chn_i].connect
285 (mem_fun (*this, &MIDIControllable::midi_sense_note_on));
287 midi_sense_connection[1] = p.channel_note_off[chn_i].connect
288 (mem_fun (*this, &MIDIControllable::midi_sense_note_off));
293 _control_description = "MIDI control: NoteOn";
296 case MIDI::controller:
297 midi_sense_connection[0] = p.channel_controller[chn_i].connect
298 (mem_fun (*this, &MIDIControllable::midi_sense_controller));
300 snprintf (buf, sizeof (buf), "MIDI control: Controller %d", control_additional);
301 _control_description = buf;
306 midi_sense_connection[0] = p.channel_program_change[chn_i].connect
308 &MIDIControllable::midi_sense_program_change));
310 _control_description = "MIDI control: ProgramChange";
314 case MIDI::pitchbend:
316 midi_sense_connection[0] = p.channel_pitchbend[chn_i].connect
317 (mem_fun (*this, &MIDIControllable::midi_sense_pitchbend));
319 _control_description = "MIDI control: Pitchbend";
329 MIDIControllable::send_feedback ()
333 if (setting || !feedback || control_type == none) {
337 msg[0] = (control_type & 0xF0) | (control_channel & 0xF);
338 msg[1] = control_additional;
339 msg[2] = (byte) (control_to_midi(controllable.get_value()));
341 _port.write (msg, 3, 0);
345 MIDIControllable::write_feedback (MIDI::byte* buf, int32_t& bufsize, bool /*force*/)
347 if (control_type != none && feedback && bufsize > 2) {
349 MIDI::byte gm = (MIDI::byte) (control_to_midi(controllable.get_value()));
351 if (gm != last_value) {
352 *buf++ = (0xF0 & control_type) | (0xF & control_channel);
353 *buf++ = control_additional; /* controller number */
364 MIDIControllable::set_state (const XMLNode& node, int version)
366 const XMLProperty* prop;
369 if ((prop = node.property ("event")) != 0) {
370 sscanf (prop->value().c_str(), "0x%x", &xx);
371 control_type = (MIDI::eventType) xx;
376 if ((prop = node.property ("channel")) != 0) {
377 sscanf (prop->value().c_str(), "%d", &xx);
378 control_channel = (MIDI::channel_t) xx;
383 if ((prop = node.property ("additional")) != 0) {
384 sscanf (prop->value().c_str(), "0x%x", &xx);
385 control_additional = (MIDI::byte) xx;
390 if ((prop = node.property ("feedback")) != 0) {
391 feedback = (prop->value() == "yes");
393 feedback = true; // default
396 bind_midi (control_channel, control_type, control_additional);
402 MIDIControllable::get_state ()
405 XMLNode& node (controllable.get_state ());
407 snprintf (buf, sizeof(buf), "0x%x", (int) control_type);
408 node.add_property ("event", buf);
409 snprintf (buf, sizeof(buf), "%d", (int) control_channel);
410 node.add_property ("channel", buf);
411 snprintf (buf, sizeof(buf), "0x%x", (int) control_additional);
412 node.add_property ("additional", buf);
413 node.add_property ("feedback", (feedback ? "yes" : "no"));