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/*************************************************************************/
/* midi_driver.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2019 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2019 Godot Engine contributors (cf. AUTHORS.md) */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "midi_driver.h"
#include "core/os/os.h"
#include "main/input_default.h"
uint8_t MIDIDriver::last_received_message = 0x00;
MIDIDriver *MIDIDriver::singleton = NULL;
MIDIDriver *MIDIDriver::get_singleton() {
return singleton;
}
void MIDIDriver::set_singleton() {
singleton = this;
}
void MIDIDriver::receive_input_packet(uint64_t timestamp, uint8_t *data, uint32_t length) {
Ref<InputEventMIDI> event;
event.instance();
uint32_t param_position = 1;
if (length >= 1) {
if ((data[0] & 0x80) == 0x00) {
// running status
event->set_channel(last_received_message & 0xF);
event->set_message(last_received_message >> 4);
param_position = 0;
} else {
event->set_channel(data[0] & 0xF);
event->set_message(data[0] >> 4);
param_position = 1;
last_received_message = data[0];
}
}
switch (event->get_message()) {
case MIDI_MESSAGE_AFTERTOUCH:
if (length >= 2 + param_position) {
event->set_pitch(data[param_position]);
event->set_pressure(data[param_position + 1]);
}
break;
case MIDI_MESSAGE_CONTROL_CHANGE:
if (length >= 2 + param_position) {
event->set_controller_number(data[param_position]);
event->set_controller_value(data[param_position + 1]);
}
break;
case MIDI_MESSAGE_NOTE_ON:
case MIDI_MESSAGE_NOTE_OFF:
if (length >= 2 + param_position) {
event->set_pitch(data[param_position]);
event->set_velocity(data[param_position + 1]);
if (event->get_message() == MIDI_MESSAGE_NOTE_ON && event->get_velocity() == 0) {
// https://www.midi.org/forum/228-writing-midi-software-send-note-off,-or-zero-velocity-note-on
event->set_message(MIDI_MESSAGE_NOTE_OFF);
}
}
break;
case MIDI_MESSAGE_PITCH_BEND:
if (length >= 2 + param_position) {
event->set_pitch((data[param_position + 1] << 7) | data[param_position]);
}
break;
case MIDI_MESSAGE_PROGRAM_CHANGE:
if (length >= 1 + param_position) {
event->set_instrument(data[param_position]);
}
break;
case MIDI_MESSAGE_CHANNEL_PRESSURE:
if (length >= 1 + param_position) {
event->set_pressure(data[param_position]);
}
break;
}
InputDefault *id = Object::cast_to<InputDefault>(Input::get_singleton());
id->parse_input_event(event);
}
PoolStringArray MIDIDriver::get_connected_inputs() {
PoolStringArray list;
return list;
}
MIDIDriver::MIDIDriver() {
set_singleton();
}
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