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-rw-r--r--libs/midi++2/midicontrollable.cc326
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diff --git a/libs/midi++2/midicontrollable.cc b/libs/midi++2/midicontrollable.cc
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-/*
- Copyright (C) 1998-99 Paul Barton-Davis
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-
- $Id$
-*/
-
-#include <cstdio> /* for sprintf, sigh */
-#include <pbd/error.h>
-#include <midi++/port.h>
-#include <midi++/channel.h>
-#include <midi++/controllable.h>
-
-using namespace sigc;
-using namespace MIDI;
-using namespace PBD;
-
-Controllable::Controllable (Port *p, bool is_bistate)
-{
- control_type = none;
- _control_description = "MIDI Control: none";
- control_additional = (byte) -1;
- bistate = is_bistate;
- connections = 0;
- feedback = true; // for now
-
- /* use channel 0 ("1") as the initial channel */
-
- midi_rebind (p, 0);
-}
-
-Controllable::~Controllable ()
-{
- drop_external_control ();
-}
-
-void
-Controllable::midi_forget ()
-{
- /* stop listening for incoming messages, but retain
- our existing event + type information.
- */
-
- if (connections > 0) {
- midi_sense_connection[0].disconnect ();
- }
-
- if (connections > 1) {
- midi_sense_connection[1].disconnect ();
- }
-
- connections = 0;
- midi_learn_connection.disconnect ();
-
-}
-
-void
-Controllable::midi_rebind (Port *p, channel_t c)
-{
- if ((port = p) == 0) {
- midi_forget ();
- } else {
- if (c >= 0) {
- bind_midi (c, control_type, control_additional);
- } else {
- midi_forget ();
- }
- }
-}
-
-void
-Controllable::learn_about_external_control ()
-{
- drop_external_control ();
-
- if (port) {
- midi_learn_connection = port->input()->any.connect (mem_fun (*this, &Controllable::midi_receiver));
- learning_started ();
-
- } else {
- info << "No MIDI port specified - external control disabled" << endmsg;
- }
-}
-
-void
-Controllable::stop_learning ()
-{
- midi_learn_connection.disconnect ();
-}
-
-void
-Controllable::drop_external_control ()
-{
- if (connections > 0) {
- midi_sense_connection[0].disconnect ();
- }
- if (connections > 1) {
- midi_sense_connection[1].disconnect ();
- }
-
- connections = 0;
- midi_learn_connection.disconnect ();
-
- control_type = none;
- control_additional = (byte) -1;
-}
-
-void
-Controllable::midi_sense_note_on (Parser &p, EventTwoBytes *tb)
-{
- midi_sense_note (p, tb, true);
-}
-
-void
-Controllable::midi_sense_note_off (Parser &p, EventTwoBytes *tb)
-{
- midi_sense_note (p, tb, false);
-}
-
-void
-Controllable::midi_sense_note (Parser &p, EventTwoBytes *msg, bool is_on)
-{
- if (!bistate) {
- set_value (msg->note_number/127.0);
- } else {
-
- /* Note: parser handles the use of zero velocity to
- mean note off. if we get called with is_on=true, then we
- got a *real* note on.
- */
-
- if (msg->note_number == control_additional) {
- set_value (is_on ? 1 : 0);
- }
- }
-}
-
-void
-Controllable::midi_sense_controller (Parser &, EventTwoBytes *msg)
-{
- if (control_additional == msg->controller_number) {
- if (!bistate) {
- set_value (msg->value/127.0);
- } else {
- if (msg->value > 64.0) {
- set_value (1);
- } else {
- set_value (0);
- }
- }
- }
-}
-
-void
-Controllable::midi_sense_program_change (Parser &p, byte msg)
-{
- /* XXX program change messages make no sense for bistates */
-
- if (!bistate) {
- set_value (msg/127.0);
- }
-}
-
-void
-Controllable::midi_sense_pitchbend (Parser &p, pitchbend_t pb)
-{
- /* pitchbend messages make no sense for bistates */
-
- /* XXX gack - get rid of assumption about typeof pitchbend_t */
-
- set_value ((pb/(float) SHRT_MAX));
-}
-
-void
-Controllable::midi_receiver (Parser &p, byte *msg, size_t len)
-{
- /* we only respond to channel messages */
-
- if ((msg[0] & 0xF0) < 0x80 || (msg[0] & 0xF0) > 0xE0) {
- return;
- }
-
- /* if the our port doesn't do input anymore, forget it ... */
-
- if (!port->input()) {
- return;
- }
-
- bind_midi ((channel_t) (msg[0] & 0xf), eventType (msg[0] & 0xF0), msg[1]);
-
- learning_stopped ();
-}
-
-void
-Controllable::bind_midi (channel_t chn, eventType ev, MIDI::byte additional)
-{
- char buf[64];
-
- drop_external_control ();
-
- control_type = ev;
- control_channel = chn;
- control_additional = additional;
-
- if (port == 0 || port->input() == 0) {
- return;
- }
-
- Parser& p = *port->input();
-
- int chn_i = chn;
- switch (ev) {
- case MIDI::off:
- midi_sense_connection[0] = p.channel_note_off[chn_i].connect
- (mem_fun (*this, &Controllable::midi_sense_note_off));
-
- /* if this is a bistate, connect to noteOn as well,
- and we'll toggle back and forth between the two.
- */
-
- if (bistate) {
- midi_sense_connection[1] = p.channel_note_on[chn_i].connect
- (mem_fun (*this, &Controllable::midi_sense_note_on));
- connections = 2;
- } else {
- connections = 1;
- }
- _control_description = "MIDI control: NoteOff";
- break;
-
- case MIDI::on:
- midi_sense_connection[0] = p.channel_note_on[chn_i].connect
- (mem_fun (*this, &Controllable::midi_sense_note_on));
- if (bistate) {
- midi_sense_connection[1] = p.channel_note_off[chn_i].connect
- (mem_fun (*this, &Controllable::midi_sense_note_off));
- connections = 2;
- } else {
- connections = 1;
- }
- _control_description = "MIDI control: NoteOn";
- break;
-
- case MIDI::controller:
- midi_sense_connection[0] = p.channel_controller[chn_i].connect
- (mem_fun (*this, &Controllable::midi_sense_controller));
- connections = 1;
- snprintf (buf, sizeof (buf), "MIDI control: Controller %d", control_additional);
- _control_description = buf;
- break;
-
- case MIDI::program:
- if (!bistate) {
- midi_sense_connection[0] = p.channel_program_change[chn_i].connect
- (mem_fun (*this,
- &Controllable::midi_sense_program_change));
- connections = 1;
- _control_description = "MIDI control: ProgramChange";
- }
- break;
-
- case MIDI::pitchbend:
- if (!bistate) {
- midi_sense_connection[0] = p.channel_pitchbend[chn_i].connect
- (mem_fun (*this, &Controllable::midi_sense_pitchbend));
- connections = 1;
- _control_description = "MIDI control: Pitchbend";
- }
- break;
-
- default:
- break;
- }
-}
-
-void
-Controllable::set_control_type (channel_t chn, eventType ev, MIDI::byte additional)
-{
- bind_midi (chn, ev, additional);
-}
-
-bool
-Controllable::get_control_info (channel_t& chn, eventType& ev, byte& additional)
-{
- if (control_type == none) {
- chn = -1;
- return false;
- }
-
- ev = control_type;
- chn = control_channel;
- additional = control_additional;
-
- return true;
-}
-
-
-void
-Controllable::send_midi_feedback (float val)
-{
- byte msg[3];
-
- if (port == 0 || control_type == none) {
- return;
- }
-
- msg[0] = (control_type & 0xF0) | (control_channel & 0xF);
- msg[1] = control_additional;
- msg[2] = (byte) (val * 127.0f);
-
- port->write (msg, 3);
-}
-