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It is possible to query the OS for the connected MIDI controllers, but the event messages' device field was not being used. This implements controller index being sent in InputEventMIDI messages in the device property, matching the index from OS.get_connected_midi_inputs(). Based on the work done by @ramdor. Closes godotengine/godot-proposals#7733 Co-authored-by: Richie <richie_github@grange-lane.co.uk>
112 lines
4.1 KiB
C++
112 lines
4.1 KiB
C++
/**************************************************************************/
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/* midi_driver_alsamidi.h */
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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) 2014-present Godot Engine contributors (see AUTHORS.md). */
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/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
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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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#ifndef MIDI_DRIVER_ALSAMIDI_H
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#define MIDI_DRIVER_ALSAMIDI_H
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#ifdef ALSAMIDI_ENABLED
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#include "core/os/midi_driver.h"
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#include "core/os/mutex.h"
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#include "core/os/thread.h"
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#include "core/templates/safe_refcount.h"
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#include "core/templates/vector.h"
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#ifdef SOWRAP_ENABLED
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#include "../alsa/asound-so_wrap.h"
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#else
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#include <alsa/asoundlib.h>
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#endif
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#include <stdio.h>
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class MIDIDriverALSAMidi : public MIDIDriver {
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Thread thread;
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Mutex mutex;
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class InputConnection {
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public:
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InputConnection() = default;
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InputConnection(snd_rawmidi_t *midi_in) :
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rawmidi_ptr{ midi_in } {}
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// Read in and parse available data, forwarding any complete messages through the driver.
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int read_in(MIDIDriverALSAMidi &driver, uint64_t timestamp, int device_index);
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snd_rawmidi_t *rawmidi_ptr = nullptr;
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private:
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static const size_t MSG_BUFFER_SIZE = 3;
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uint8_t buffer[MSG_BUFFER_SIZE] = { 0 };
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size_t expected_data = 0;
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size_t received_data = 0;
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bool skipping_sys_ex = false;
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void parse_byte(uint8_t byte, MIDIDriverALSAMidi &driver, uint64_t timestamp, int device_index);
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};
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Vector<InputConnection> connected_inputs;
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SafeFlag exit_thread;
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static void thread_func(void *p_udata);
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enum class MessageCategory {
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Data,
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Voice,
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SysExBegin,
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SystemCommon, // excluding System Exclusive Begin/End
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SysExEnd,
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RealTime,
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};
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// If the passed byte is a status byte, return the associated message category,
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// else return MessageCategory::Data.
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static MessageCategory msg_category(uint8_t msg_part);
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// Return the number of data bytes expected for the provided status byte.
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static size_t msg_expected_data(uint8_t status_byte);
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void lock() const;
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void unlock() const;
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public:
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virtual Error open();
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virtual void close();
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virtual PackedStringArray get_connected_inputs();
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MIDIDriverALSAMidi();
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virtual ~MIDIDriverALSAMidi();
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};
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#endif // ALSAMIDI_ENABLED
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#endif // MIDI_DRIVER_ALSAMIDI_H
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