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Copyright (C) 1998-2006 Paul Davis
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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#include "pbd/error.h"
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#include "pbd/controllable_descriptor.h"
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#include "pbd/xml++.h"
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#include "pbd/stacktrace.h"
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#include "midi++/port.h"
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#include "midi++/channel.h"
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#include "ardour/automation_control.h"
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#include "ardour/midi_ui.h"
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#include "ardour/utils.h"
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#include "midicontrollable.h"
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#include "generic_midi_control_protocol.h"
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using namespace ARDOUR;
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MIDIControllable::MIDIControllable (GenericMidiControlProtocol* s, Port& p, bool m)
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_learned = false; /* from URI */
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last_value = 0; // got a better idea ?
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last_controllable_value = 0.0f;
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_control_description = "MIDI Control: none";
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control_additional = (byte) -1;
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feedback = true; // for now
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MIDIControllable::MIDIControllable (GenericMidiControlProtocol* s, Port& p, Controllable& c, bool m)
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set_controllable (&c);
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_learned = true; /* from controllable */
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last_value = 0; // got a better idea ?
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last_controllable_value = 0.0f;
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_control_description = "MIDI Control: none";
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control_additional = (byte) -1;
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feedback = true; // for now
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MIDIControllable::~MIDIControllable ()
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drop_external_control ();
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MIDIControllable::init (const std::string& s)
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_descriptor = new ControllableDescriptor;
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return _descriptor->set (s);
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MIDIControllable::midi_forget ()
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/* stop listening for incoming messages, but retain
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our existing event + type information.
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midi_sense_connection[0].disconnect ();
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midi_sense_connection[1].disconnect ();
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midi_learn_connection.disconnect ();
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MIDIControllable::drop_external_control ()
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control_additional = (byte) -1;
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MIDIControllable::set_controllable (Controllable* c)
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if (c == controllable) {
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controllable_death_connection.disconnect ();
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last_controllable_value = controllable->get_value();
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last_controllable_value = 0.0f; // is there a better value?
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controllable->Destroyed.connect (controllable_death_connection, MISSING_INVALIDATOR,
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boost::bind (&MIDIControllable::drop_controllable, this),
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MidiControlUI::instance());
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MIDIControllable::midi_rebind (channel_t c)
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bind_midi (c, control_type, control_additional);
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MIDIControllable::learn_about_external_control ()
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drop_external_control ();
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_port.parser()->any.connect_same_thread (midi_learn_connection, boost::bind (&MIDIControllable::midi_receiver, this, _1, _2, _3));
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MIDIControllable::stop_learning ()
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midi_learn_connection.disconnect ();
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MIDIControllable::control_to_midi (float val)
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if (controllable->is_gain_like()) {
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return gain_to_slider_position (val) * max_value_for_type ();
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float control_min = controllable->lower ();
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float control_max = controllable->upper ();
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const float control_range = control_max - control_min;
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if (controllable->is_toggle()) {
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if (val >= (control_min + (control_range/2.0f))) {
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return max_value_for_type();
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return (val - control_min) / control_range * max_value_for_type ();
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MIDIControllable::midi_to_control (int val)
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/* fiddle with MIDI value so that we get an odd number of integer steps
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and can thus represent "middle" precisely as 0.5. this maps to
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float fv = (val == 0 ? 0 : float (val - 1) / (max_value_for_type() - 1));
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if (controllable->is_gain_like()) {
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return slider_position_to_gain (fv);
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float control_min = controllable->lower ();
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float control_max = controllable->upper ();
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const float control_range = control_max - control_min;
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return (fv * control_range) + control_min;
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MIDIControllable::midi_sense_note_on (Parser &p, EventTwoBytes *tb)
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midi_sense_note (p, tb, true);
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MIDIControllable::midi_sense_note_off (Parser &p, EventTwoBytes *tb)
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midi_sense_note (p, tb, false);
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MIDIControllable::lookup_controllable()
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boost::shared_ptr<Controllable> c = _surface->lookup_controllable (*_descriptor);
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set_controllable (c.get ());
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MIDIControllable::drop_controllable ()
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set_controllable (0);
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MIDIControllable::midi_sense_note (Parser &, EventTwoBytes *msg, bool /*is_on*/)
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if (lookup_controllable()) {
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if (!controllable->is_toggle()) {
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if (control_additional == msg->note_number) {
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controllable->set_value (midi_to_control (msg->velocity));
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if (control_additional == msg->note_number) {
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controllable->set_value (controllable->get_value() > 0.5f ? 0.0f : 1.0f);
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last_value = (MIDI::byte) (controllable->get_value() * 127.0); // to prevent feedback fights
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MIDIControllable::midi_sense_controller (Parser &, EventTwoBytes *msg)
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if (lookup_controllable ()) {
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assert (controllable);
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if (controllable->touching()) {
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return; // to prevent feedback fights when e.g. dragging a UI slider
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if (control_additional == msg->controller_number) {
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if (!controllable->is_toggle()) {
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float new_value = msg->value;
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float max_value = max(last_controllable_value, new_value);
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float min_value = min(last_controllable_value, new_value);
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float range = max_value - min_value;
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float threshold = (float) _surface->threshold ();
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bool const in_sync = (
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controllable->get_value() <= midi_to_control(max_value) &&
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controllable->get_value() >= midi_to_control(min_value)
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/* If the surface is not motorised, we try to prevent jumps when
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the MIDI controller and controllable are out of sync.
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There might be a better way of doing this.
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if (in_sync || _surface->motorised ()) {
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controllable->set_value (midi_to_control (new_value));
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last_controllable_value = new_value;
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if (msg->value > 64.0f) {
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controllable->set_value (1);
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controllable->set_value (0);
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last_value = (MIDI::byte) (control_to_midi(controllable->get_value())); // to prevent feedback fights
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MIDIControllable::midi_sense_program_change (Parser &, byte msg)
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if (lookup_controllable ()) {
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if (!controllable->is_toggle()) {
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controllable->set_value (midi_to_control (msg));
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} else if (msg == control_additional) {
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controllable->set_value (controllable->get_value() > 0.5f ? 0.0f : 1.0f);
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last_value = (MIDI::byte) (controllable->get_value() * 127.0); // to prevent feedback fights
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MIDIControllable::midi_sense_pitchbend (Parser &, pitchbend_t pb)
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if (lookup_controllable ()) {
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if (!controllable->is_toggle()) {
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controllable->set_value (midi_to_control (pb));
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controllable->set_value (controllable->get_value() > 0.5f ? 0.0f : 1.0f);
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last_value = control_to_midi (controllable->get_value ());
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MIDIControllable::midi_receiver (Parser &, byte *msg, size_t /*len*/)
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/* we only respond to channel messages */
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if ((msg[0] & 0xF0) < 0x80 || (msg[0] & 0xF0) > 0xE0) {
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/* if the our port doesn't do input anymore, forget it ... */
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if (!_port.parser()) {
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bind_midi ((channel_t) (msg[0] & 0xf), eventType (msg[0] & 0xF0), msg[1]);
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controllable->LearningFinished ();
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MIDIControllable::bind_midi (channel_t chn, eventType ev, MIDI::byte additional)
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drop_external_control ();
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control_channel = chn;
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control_additional = additional;
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if (_port.parser() == 0) {
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Parser& p = *_port.parser();
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p.channel_note_off[chn_i].connect_same_thread (midi_sense_connection[0], boost::bind (&MIDIControllable::midi_sense_note_off, this, _1, _2));
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/* if this is a togglee, connect to noteOn as well,
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and we'll toggle back and forth between the two.
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p.channel_note_on[chn_i].connect_same_thread (midi_sense_connection[1], boost::bind (&MIDIControllable::midi_sense_note_on, this, _1, _2));
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_control_description = "MIDI control: NoteOff";
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p.channel_note_on[chn_i].connect_same_thread (midi_sense_connection[0], boost::bind (&MIDIControllable::midi_sense_note_on, this, _1, _2));
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p.channel_note_off[chn_i].connect_same_thread (midi_sense_connection[1], boost::bind (&MIDIControllable::midi_sense_note_off, this, _1, _2));
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_control_description = "MIDI control: NoteOn";
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case MIDI::controller:
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p.channel_controller[chn_i].connect_same_thread (midi_sense_connection[0], boost::bind (&MIDIControllable::midi_sense_controller, this, _1, _2));
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snprintf (buf, sizeof (buf), "MIDI control: Controller %d", control_additional);
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_control_description = buf;
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p.channel_program_change[chn_i].connect_same_thread (midi_sense_connection[0], boost::bind (&MIDIControllable::midi_sense_program_change, this, _1, _2));
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_control_description = "MIDI control: ProgramChange";
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case MIDI::pitchbend:
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p.channel_pitchbend[chn_i].connect_same_thread (midi_sense_connection[0], boost::bind (&MIDIControllable::midi_sense_pitchbend, this, _1, _2));
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_control_description = "MIDI control: Pitchbend";
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MIDIControllable::write_feedback (MIDI::byte* buf, int32_t& bufsize, bool /*force*/)
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if (!controllable || control_type == none || !feedback || bufsize <= 2) {
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int const gm = control_to_midi (controllable->get_value());
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if (gm == last_value) {
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*buf++ = (0xF0 & control_type) | (0xF & control_channel);
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switch (control_type) {
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case MIDI::pitchbend:
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*buf++ = int (gm) & 127;
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*buf++ = (int (gm) >> 7) & 127;
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*buf++ = control_additional; /* controller number */
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MIDIControllable::set_state (const XMLNode& node, int /*version*/)
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const XMLProperty* prop;
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if ((prop = node.property ("event")) != 0) {
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sscanf (prop->value().c_str(), "0x%x", &xx);
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control_type = (MIDI::eventType) xx;
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if ((prop = node.property ("channel")) != 0) {
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sscanf (prop->value().c_str(), "%d", &xx);
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control_channel = (MIDI::channel_t) xx;
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if ((prop = node.property ("additional")) != 0) {
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sscanf (prop->value().c_str(), "0x%x", &xx);
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control_additional = (MIDI::byte) xx;
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if ((prop = node.property ("feedback")) != 0) {
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feedback = (prop->value() == "yes");
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feedback = true; // default
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bind_midi (control_channel, control_type, control_additional);
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MIDIControllable::get_state ()
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XMLNode* node = new XMLNode ("MIDIControllable");
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if (_current_uri.empty()) {
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node->add_property ("id", controllable->id().to_s());
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node->add_property ("uri", _current_uri);
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snprintf (buf, sizeof(buf), "0x%x", (int) control_type);
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node->add_property ("event", buf);
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snprintf (buf, sizeof(buf), "%d", (int) control_channel);
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node->add_property ("channel", buf);
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snprintf (buf, sizeof(buf), "0x%x", (int) control_additional);
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node->add_property ("additional", buf);
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node->add_property ("feedback", (feedback ? "yes" : "no"));
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/** @return the maximum value for a control value transmitted
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* using a given MIDI::eventType.
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MIDIControllable::max_value_for_type () const
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/* XXX: this is not complete */
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if (control_type == MIDI::pitchbend) {