/*************************************************************************/ /* midi_driver.cpp */ /*************************************************************************/ /* This file is part of: */ /* GODOT ENGINE */ /* https://godotengine.org */ /*************************************************************************/ /* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */ /* Copyright (c) 2014-2020 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/input/input.h" #include "core/os/os.h" uint8_t MIDIDriver::last_received_message = 0x00; MIDIDriver *MIDIDriver::singleton = nullptr; 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] >= 0xF0) { // channel does not apply to system common messages event->set_channel(0); event->set_message(data[0]); last_received_message = data[0]; } else 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; } Input *id = Input::get_singleton(); id->parse_input_event(event); } PackedStringArray MIDIDriver::get_connected_inputs() { PackedStringArray list; return list; } MIDIDriver::MIDIDriver() { set_singleton(); }