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>
27 #include "midicontrollable.h"
32 using namespace ARDOUR;
34 MIDIControllable::MIDIControllable (Port& p, Controllable& c, bool is_bistate)
35 : controllable (c), _port (p), bistate (is_bistate)
38 last_value = 0; // got a better idea ?
40 _control_description = "MIDI Control: none";
41 control_additional = (byte) -1;
43 feedback = true; // for now
45 /* use channel 0 ("1") as the initial channel */
50 MIDIControllable::~MIDIControllable ()
52 drop_external_control ();
56 MIDIControllable::midi_forget ()
58 /* stop listening for incoming messages, but retain
59 our existing event + type information.
62 if (connections > 0) {
63 midi_sense_connection[0].disconnect ();
66 if (connections > 1) {
67 midi_sense_connection[1].disconnect ();
71 midi_learn_connection.disconnect ();
76 MIDIControllable::midi_rebind (channel_t c)
79 bind_midi (c, control_type, control_additional);
86 MIDIControllable::learn_about_external_control ()
88 drop_external_control ();
89 midi_learn_connection = _port.input()->any.connect (mem_fun (*this, &MIDIControllable::midi_receiver));
93 MIDIControllable::stop_learning ()
95 midi_learn_connection.disconnect ();
99 MIDIControllable::drop_external_control ()
101 cerr << "Dropping existing control using " << connections << " connections\n";
103 if (connections > 0) {
104 midi_sense_connection[0].disconnect ();
106 if (connections > 1) {
107 midi_sense_connection[1].disconnect ();
111 midi_learn_connection.disconnect ();
114 control_additional = (byte) -1;
118 MIDIControllable::midi_sense_note_on (Parser &p, EventTwoBytes *tb)
120 midi_sense_note (p, tb, true);
124 MIDIControllable::midi_sense_note_off (Parser &p, EventTwoBytes *tb)
126 midi_sense_note (p, tb, false);
130 MIDIControllable::midi_sense_note (Parser &p, EventTwoBytes *msg, bool is_on)
133 controllable.set_value (msg->note_number/127.0);
136 /* Note: parser handles the use of zero velocity to
137 mean note off. if we get called with is_on=true, then we
138 got a *real* note on.
141 if (msg->note_number == control_additional) {
142 controllable.set_value (is_on ? 1 : 0);
146 last_value = (MIDI::byte) (controllable.get_value() * 127.0); // to prevent feedback fights
150 MIDIControllable::midi_sense_controller (Parser &, EventTwoBytes *msg)
152 if (control_additional == msg->controller_number) {
154 controllable.set_value (msg->value/127.0);
156 if (msg->value > 64.0) {
157 controllable.set_value (1);
159 controllable.set_value (0);
163 last_value = (MIDI::byte) (controllable.get_value() * 127.0); // to prevent feedback fights
168 MIDIControllable::midi_sense_program_change (Parser &p, byte msg)
170 /* XXX program change messages make no sense for bistates */
173 controllable.set_value (msg/127.0);
174 last_value = (MIDI::byte) (controllable.get_value() * 127.0); // to prevent feedback fights
179 MIDIControllable::midi_sense_pitchbend (Parser &p, pitchbend_t pb)
181 /* pitchbend messages make no sense for bistates */
183 /* XXX gack - get rid of assumption about typeof pitchbend_t */
185 controllable.set_value ((pb/(float) SHRT_MAX));
186 last_value = (MIDI::byte) (controllable.get_value() * 127.0); // to prevent feedback fights
190 MIDIControllable::midi_receiver (Parser &p, byte *msg, size_t len)
192 /* we only respond to channel messages */
194 if ((msg[0] & 0xF0) < 0x80 || (msg[0] & 0xF0) > 0xE0) {
198 /* if the our port doesn't do input anymore, forget it ... */
200 if (!_port.input()) {
204 bind_midi ((channel_t) (msg[0] & 0xf), eventType (msg[0] & 0xF0), msg[1]);
206 controllable.LearningFinished ();
210 MIDIControllable::bind_midi (channel_t chn, eventType ev, MIDI::byte additional)
214 drop_external_control ();
217 control_channel = chn;
218 control_additional = additional;
220 if (_port.input() == 0) {
224 Parser& p = *_port.input();
229 midi_sense_connection[0] = p.channel_note_off[chn_i].connect
230 (mem_fun (*this, &MIDIControllable::midi_sense_note_off));
232 /* if this is a bistate, connect to noteOn as well,
233 and we'll toggle back and forth between the two.
237 midi_sense_connection[1] = p.channel_note_on[chn_i].connect
238 (mem_fun (*this, &MIDIControllable::midi_sense_note_on));
243 _control_description = "MIDI control: NoteOff";
247 midi_sense_connection[0] = p.channel_note_on[chn_i].connect
248 (mem_fun (*this, &MIDIControllable::midi_sense_note_on));
250 midi_sense_connection[1] = p.channel_note_off[chn_i].connect
251 (mem_fun (*this, &MIDIControllable::midi_sense_note_off));
256 _control_description = "MIDI control: NoteOn";
259 case MIDI::controller:
260 midi_sense_connection[0] = p.channel_controller[chn_i].connect
261 (mem_fun (*this, &MIDIControllable::midi_sense_controller));
263 snprintf (buf, sizeof (buf), "MIDI control: Controller %d", control_additional);
264 _control_description = buf;
269 midi_sense_connection[0] = p.channel_program_change[chn_i].connect
271 &MIDIControllable::midi_sense_program_change));
273 _control_description = "MIDI control: ProgramChange";
277 case MIDI::pitchbend:
279 midi_sense_connection[0] = p.channel_pitchbend[chn_i].connect
280 (mem_fun (*this, &MIDIControllable::midi_sense_pitchbend));
282 _control_description = "MIDI control: Pitchbend";
290 cerr << "MIDI bound with " << connections << endl;
294 MIDIControllable::send_feedback ()
298 if (setting || !feedback || control_type == none) {
302 msg[0] = (control_type & 0xF0) | (control_channel & 0xF);
303 msg[1] = control_additional;
304 msg[2] = (byte) (controllable.get_value() * 127.0f);
306 _port.write (msg, 3);
310 MIDIControllable::write_feedback (MIDI::byte* buf, int32_t& bufsize, bool force)
312 if (control_type != none && feedback && bufsize > 2) {
314 MIDI::byte gm = (MIDI::byte) (controllable.get_value() * 127.0);
316 if (gm != last_value) {
317 *buf++ = (0xF0 & control_type) | (0xF & control_channel);
318 *buf++ = control_additional; /* controller number */
329 MIDIControllable::set_state (const XMLNode& node)
331 const XMLProperty* prop;
334 if ((prop = node.property ("event")) != 0) {
335 sscanf (prop->value().c_str(), "0x%x", &xx);
336 control_type = (MIDI::eventType) xx;
341 if ((prop = node.property ("channel")) != 0) {
342 sscanf (prop->value().c_str(), "%d", &xx);
343 control_channel = (MIDI::channel_t) xx;
348 if ((prop = node.property ("additional")) != 0) {
349 sscanf (prop->value().c_str(), "0x%x", &xx);
350 control_additional = (MIDI::byte) xx;
355 if ((prop = node.property ("feedback")) != 0) {
356 feedback = (prop->value() == "yes");
358 feedback = true; // default
361 bind_midi (control_channel, control_type, control_additional);
367 MIDIControllable::get_state ()
370 XMLNode& node (controllable.get_state ());
372 snprintf (buf, sizeof(buf), "0x%x", (int) control_type);
373 node.add_property ("event", buf);
374 snprintf (buf, sizeof(buf), "%d", (int) control_channel);
375 node.add_property ("channel", buf);
376 snprintf (buf, sizeof(buf), "0x%x", (int) control_additional);
377 node.add_property ("additional", buf);
378 node.add_property ("feedback", (feedback ? "yes" : "no"));