131 lines
4.7 KiB
C++
131 lines
4.7 KiB
C++
/*************************************************************************/
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/* midi_driver.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#include "midi_driver.h"
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#include "core/input/input.h"
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#include "core/os/os.h"
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uint8_t MIDIDriver::last_received_message = 0x00;
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MIDIDriver *MIDIDriver::singleton = nullptr;
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MIDIDriver *MIDIDriver::get_singleton() {
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return singleton;
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}
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void MIDIDriver::set_singleton() {
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singleton = this;
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}
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void MIDIDriver::receive_input_packet(uint64_t timestamp, uint8_t *data, uint32_t length) {
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Ref<InputEventMIDI> event;
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event.instantiate();
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uint32_t param_position = 1;
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if (length >= 1) {
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if (data[0] >= 0xF0) {
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// channel does not apply to system common messages
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event->set_channel(0);
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event->set_message(MIDIMessage(data[0]));
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last_received_message = data[0];
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} else if ((data[0] & 0x80) == 0x00) {
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// running status
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event->set_channel(last_received_message & 0xF);
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event->set_message(MIDIMessage(last_received_message >> 4));
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param_position = 0;
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} else {
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event->set_channel(data[0] & 0xF);
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event->set_message(MIDIMessage(data[0] >> 4));
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param_position = 1;
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last_received_message = data[0];
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}
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}
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switch (event->get_message()) {
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case MIDIMessage::AFTERTOUCH:
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if (length >= 2 + param_position) {
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event->set_pitch(data[param_position]);
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event->set_pressure(data[param_position + 1]);
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}
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break;
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case MIDIMessage::CONTROL_CHANGE:
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if (length >= 2 + param_position) {
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event->set_controller_number(data[param_position]);
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event->set_controller_value(data[param_position + 1]);
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}
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break;
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case MIDIMessage::NOTE_ON:
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case MIDIMessage::NOTE_OFF:
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if (length >= 2 + param_position) {
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event->set_pitch(data[param_position]);
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event->set_velocity(data[param_position + 1]);
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if (event->get_message() == MIDIMessage::NOTE_ON && event->get_velocity() == 0) {
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// https://www.midi.org/forum/228-writing-midi-software-send-note-off,-or-zero-velocity-note-on
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event->set_message(MIDIMessage::NOTE_OFF);
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}
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}
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break;
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case MIDIMessage::PITCH_BEND:
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if (length >= 2 + param_position) {
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event->set_pitch((data[param_position + 1] << 7) | data[param_position]);
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}
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break;
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case MIDIMessage::PROGRAM_CHANGE:
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if (length >= 1 + param_position) {
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event->set_instrument(data[param_position]);
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}
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break;
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case MIDIMessage::CHANNEL_PRESSURE:
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if (length >= 1 + param_position) {
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event->set_pressure(data[param_position]);
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}
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break;
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default:
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break;
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}
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Input *id = Input::get_singleton();
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id->parse_input_event(event);
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}
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PackedStringArray MIDIDriver::get_connected_inputs() {
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PackedStringArray list;
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return list;
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}
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MIDIDriver::MIDIDriver() {
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set_singleton();
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}
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