*/
-#define __STDC_FORMAT_MACROS 1
#include <stdint.h>
#include <cmath>
#include <climits>
#include "ardour/utils.h"
#include "midicontrollable.h"
+#include "generic_midi_control_protocol.h"
using namespace std;
using namespace MIDI;
using namespace PBD;
using namespace ARDOUR;
-MIDIControllable::MIDIControllable (Port& p, bool m)
- : controllable (0)
+MIDIControllable::MIDIControllable (GenericMidiControlProtocol* s, Port& p, bool m)
+ : _surface (s)
+ , controllable (0)
, _descriptor (0)
, _port (p)
, _momentary (m)
_learned = false; /* from URI */
setting = false;
last_value = 0; // got a better idea ?
+ last_controllable_value = 0.0f;
control_type = none;
_control_description = "MIDI Control: none";
control_additional = (byte) -1;
feedback = true; // for now
}
-MIDIControllable::MIDIControllable (Port& p, Controllable& c, bool m)
- : controllable (&c)
+MIDIControllable::MIDIControllable (GenericMidiControlProtocol* s, Port& p, Controllable& c, bool m)
+ : _surface (s)
+ , controllable (&c)
, _descriptor (0)
, _port (p)
, _momentary (m)
_learned = true; /* from controllable */
setting = false;
last_value = 0; // got a better idea ?
+ last_controllable_value = 0.0f;
control_type = none;
_control_description = "MIDI Control: none";
control_additional = (byte) -1;
midi_learn_connection.disconnect ();
}
-float
+int
MIDIControllable::control_to_midi (float val)
{
- const float midi_range = 127.0f; // TODO: NRPN etc.
-
if (controllable->is_gain_like()) {
- return gain_to_slider_position (val/midi_range);
+ return gain_to_slider_position (val) * max_value_for_type ();
}
float control_min = controllable->lower ();
float control_max = controllable->upper ();
const float control_range = control_max - control_min;
- return (val - control_min) / control_range * midi_range;
+ return (val - control_min) / control_range * max_value_for_type ();
}
float
-MIDIControllable::midi_to_control(float val)
+MIDIControllable::midi_to_control (int val)
{
/* fiddle with MIDI value so that we get an odd number of integer steps
and can thus represent "middle" precisely as 0.5. this maps to
the range 0..+1.0
-
- TODO: 14bit values
*/
- val = (val == 0.0f ? 0.0f : (val-1.0f) / 126.0f);
+ float fv = (val == 0 ? 0 : float (val - 1) / (max_value_for_type() - 1));
if (controllable->is_gain_like()) {
- return slider_position_to_gain (val);
+ return slider_position_to_gain (fv);
}
float control_min = controllable->lower ();
float control_max = controllable->upper ();
const float control_range = control_max - control_min;
- return (val * control_range) + control_min;
+ return (fv * control_range) + control_min;
}
void
return;
}
-
if (!controllable->is_toggle()) {
- controllable->set_value (msg->note_number/127.0);
+ controllable->set_value (midi_to_control (msg->note_number));
} else {
-
if (control_additional == msg->note_number) {
controllable->set_value (controllable->get_value() > 0.5f ? 0.0f : 1.0f);
}
if (control_additional == msg->controller_number) {
if (!controllable->is_toggle()) {
- controllable->set_value (midi_to_control (msg->value));
+ float new_value = msg->value;
+ float max_value = max(last_controllable_value, new_value);
+ float min_value = min(last_controllable_value, new_value);
+ float range = max_value - min_value;
+ float threshold = 10;
+
+ bool const in_sync = (
+ range < threshold &&
+ controllable->get_value() <= midi_to_control(max_value) &&
+ controllable->get_value() >= midi_to_control(min_value)
+ );
+
+ /* If the surface is not motorised, we try to prevent jumps when
+ the MIDI controller and controllable are out of sync.
+ There might be a better way of doing this.
+ */
+
+ if (in_sync || _surface->motorised ()) {
+ controllable->set_value (midi_to_control (new_value));
+ }
+
+ last_controllable_value = new_value;
} else {
if (msg->value > 64.0f) {
controllable->set_value (1);
}
if (!controllable->is_toggle()) {
- controllable->set_value (msg/127.0);
- } else {
+ controllable->set_value (midi_to_control (msg));
+ } else if (msg == control_additional) {
controllable->set_value (controllable->get_value() > 0.5f ? 0.0f : 1.0f);
}
}
if (!controllable->is_toggle()) {
- /* XXX gack - get rid of assumption about typeof pitchbend_t */
- controllable->set_value ((pb/(float) SHRT_MAX));
+ controllable->set_value (midi_to_control (pb));
} else {
controllable->set_value (controllable->get_value() > 0.5f ? 0.0f : 1.0f);
}
- last_value = (MIDI::byte) (controllable->get_value() * 127.0); // to prevent feedback fights
+ last_value = control_to_midi (controllable->get_value ());
}
void
}
}
-void
-MIDIControllable::send_feedback ()
-{
- byte msg[3];
-
- if (!_learned || setting || !feedback || control_type == none) {
- return;
- }
-
- msg[0] = (control_type & 0xF0) | (control_channel & 0xF);
- msg[1] = control_additional;
-
- if (controllable->is_gain_like()) {
- msg[2] = (byte) lrintf (gain_to_slider_position (controllable->get_value()) * 127.0f);
- } else {
- msg[2] = (byte) (control_to_midi(controllable->get_value()));
- }
-
- _port.write (msg, 3, 0);
-}
-
MIDI::byte*
MIDIControllable::write_feedback (MIDI::byte* buf, int32_t& bufsize, bool /*force*/)
{
- if (control_type != none && feedback && bufsize > 2) {
-
- MIDI::byte gm;
+ if (!controllable || control_type == none || !feedback || bufsize <= 2) {
+ return buf;
+ }
+
+ int const gm = control_to_midi (controllable->get_value());
- if (controllable->is_gain_like()) {
- gm = (byte) lrintf (gain_to_slider_position (controllable->get_value()) * 127.0f);
- } else {
- gm = (byte) (control_to_midi(controllable->get_value()));
- }
+ if (gm == last_value) {
+ return buf;
+ }
- if (gm != last_value) {
- *buf++ = (0xF0 & control_type) | (0xF & control_channel);
- *buf++ = control_additional; /* controller number */
- *buf++ = gm;
- last_value = gm;
- bufsize -= 3;
- }
+ *buf++ = (0xF0 & control_type) | (0xF & control_channel);
+
+ switch (control_type) {
+ case MIDI::pitchbend:
+ *buf++ = int (gm) & 127;
+ *buf++ = (int (gm) >> 7) & 127;
+ break;
+ default:
+ *buf++ = control_additional; /* controller number */
+ *buf++ = gm;
+ break;
}
+ last_value = gm;
+ bufsize -= 3;
+
return buf;
}
return *node;
}
+/** @return the maximum value for a control value transmitted
+ * using a given MIDI::eventType.
+ */
+int
+MIDIControllable::max_value_for_type () const
+{
+ /* XXX: this is not complete */
+
+ if (control_type == MIDI::pitchbend) {
+ return 16383;
+ }
+
+ return 127;
+}
projects / ardour.git / blobdiff