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/**************************************************************************/
/* midi_driver_alsamidi.h */
/**************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
/* */
/* 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. */
/**************************************************************************/
#ifndef MIDI_DRIVER_ALSAMIDI_H
#define MIDI_DRIVER_ALSAMIDI_H
#ifdef ALSAMIDI_ENABLED
#include "core/os/midi_driver.h"
#include "core/os/mutex.h"
#include "core/os/thread.h"
#include "core/templates/safe_refcount.h"
#include "core/templates/vector.h"
#ifdef SOWRAP_ENABLED
#include "../alsa/asound-so_wrap.h"
#else
#include <alsa/asoundlib.h>
#endif
#include <stdio.h>
class MIDIDriverALSAMidi : public MIDIDriver {
Thread thread;
Mutex mutex;
class InputConnection {
public:
InputConnection() = default;
InputConnection(snd_rawmidi_t *midi_in) :
rawmidi_ptr{ midi_in } {}
// Read in and parse available data, forwarding any complete messages through the driver.
int read_in(MIDIDriverALSAMidi &driver, uint64_t timestamp);
snd_rawmidi_t *rawmidi_ptr = nullptr;
private:
static const size_t MSG_BUFFER_SIZE = 3;
uint8_t buffer[MSG_BUFFER_SIZE] = { 0 };
size_t expected_data = 0;
size_t received_data = 0;
bool skipping_sys_ex = false;
void parse_byte(uint8_t byte, MIDIDriverALSAMidi &driver, uint64_t timestamp);
};
Vector<InputConnection> connected_inputs;
SafeFlag exit_thread;
static void thread_func(void *p_udata);
enum class MessageCategory {
Data,
Voice,
SysExBegin,
SystemCommon, // excluding System Exclusive Begin/End
SysExEnd,
RealTime,
};
// If the passed byte is a status byte, return the associated message category,
// else return MessageCategory::Data.
static MessageCategory msg_category(uint8_t msg_part);
// Return the number of data bytes expected for the provided status byte.
static size_t msg_expected_data(uint8_t status_byte);
void lock() const;
void unlock() const;
public:
virtual Error open();
virtual void close();
virtual PackedStringArray get_connected_inputs();
MIDIDriverALSAMidi();
virtual ~MIDIDriverALSAMidi();
};
#endif // ALSAMIDI_ENABLED
#endif // MIDI_DRIVER_ALSAMIDI_H
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