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-rw-r--r--drivers/alsamidi/SCsub8
-rw-r--r--drivers/alsamidi/alsa_midi.cpp201
-rw-r--r--drivers/alsamidi/alsa_midi.h69
3 files changed, 278 insertions, 0 deletions
diff --git a/drivers/alsamidi/SCsub b/drivers/alsamidi/SCsub
new file mode 100644
index 0000000000..233593b0f9
--- /dev/null
+++ b/drivers/alsamidi/SCsub
@@ -0,0 +1,8 @@
+#!/usr/bin/env python
+
+Import('env')
+
+# Driver source files
+env.add_source_files(env.drivers_sources, "*.cpp")
+
+Export('env')
diff --git a/drivers/alsamidi/alsa_midi.cpp b/drivers/alsamidi/alsa_midi.cpp
new file mode 100644
index 0000000000..599470d7e0
--- /dev/null
+++ b/drivers/alsamidi/alsa_midi.cpp
@@ -0,0 +1,201 @@
+/*************************************************************************/
+/* alsa_midi.cpp */
+/*************************************************************************/
+/* This file is part of: */
+/* GODOT ENGINE */
+/* https://godotengine.org */
+/*************************************************************************/
+/* Copyright (c) 2007-2018 Juan Linietsky, Ariel Manzur. */
+/* Copyright (c) 2014-2018 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. */
+/*************************************************************************/
+
+#ifdef ALSAMIDI_ENABLED
+
+#include <errno.h>
+
+#include "alsa_midi.h"
+#include "os/os.h"
+#include "print_string.h"
+
+static int get_message_size(uint8_t message) {
+ switch (message & 0xF0) {
+ case 0x80: // note off
+ case 0x90: // note on
+ case 0xA0: // aftertouch
+ case 0xB0: // continuous controller
+ return 3;
+
+ case 0xC0: // patch change
+ case 0xD0: // channel pressure
+ case 0xE0: // pitch bend
+ return 2;
+ }
+
+ return 256;
+}
+
+void MIDIDriverALSAMidi::thread_func(void *p_udata) {
+ MIDIDriverALSAMidi *md = (MIDIDriverALSAMidi *)p_udata;
+ uint64_t timestamp = 0;
+ uint8_t buffer[256];
+ int expected_size = 255;
+ int bytes = 0;
+
+ while (!md->exit_thread) {
+ int ret;
+
+ md->lock();
+
+ for (int i = 0; i < md->connected_inputs.size(); i++) {
+ snd_rawmidi_t *midi_in = md->connected_inputs[i];
+ do {
+ uint8_t byte = 0;
+ ret = snd_rawmidi_read(midi_in, &byte, 1);
+ if (ret < 0) {
+ if (ret != -EAGAIN) {
+ ERR_PRINTS("snd_rawmidi_read error: " + String(snd_strerror(ret)));
+ }
+ } else {
+ if (byte & 0x80) {
+ // Flush previous packet if there is any
+ if (bytes) {
+ md->receive_input_packet(timestamp, buffer, bytes);
+ bytes = 0;
+ }
+ expected_size = get_message_size(byte);
+ }
+
+ if (bytes < 256) {
+ buffer[bytes++] = byte;
+ // If we know the size of the current packet receive it if it reached the expected size
+ if (bytes >= expected_size) {
+ md->receive_input_packet(timestamp, buffer, bytes);
+ bytes = 0;
+ }
+ }
+ }
+ } while (ret > 0);
+ }
+
+ md->unlock();
+
+ OS::get_singleton()->delay_usec(1000);
+ }
+}
+
+Error MIDIDriverALSAMidi::open() {
+
+ void **hints;
+
+ if (snd_device_name_hint(-1, "rawmidi", &hints) < 0)
+ return ERR_CANT_OPEN;
+
+ int i = 0;
+ for (void **n = hints; *n != NULL; n++) {
+ char *name = snd_device_name_get_hint(*n, "NAME");
+
+ if (name != NULL) {
+ snd_rawmidi_t *midi_in;
+ int ret = snd_rawmidi_open(&midi_in, NULL, name, SND_RAWMIDI_NONBLOCK);
+ if (ret >= 0) {
+ connected_inputs.insert(i++, midi_in);
+ }
+ }
+
+ if (name != NULL)
+ free(name);
+ }
+ snd_device_name_free_hint(hints);
+
+ mutex = Mutex::create();
+ thread = Thread::create(MIDIDriverALSAMidi::thread_func, this);
+
+ return OK;
+}
+
+void MIDIDriverALSAMidi::close() {
+
+ if (thread) {
+ exit_thread = true;
+ Thread::wait_to_finish(thread);
+
+ memdelete(thread);
+ thread = NULL;
+ }
+
+ if (mutex) {
+ memdelete(mutex);
+ mutex = NULL;
+ }
+
+ for (int i = 0; i < connected_inputs.size(); i++) {
+ snd_rawmidi_t *midi_in = connected_inputs[i];
+ snd_rawmidi_close(midi_in);
+ }
+ connected_inputs.clear();
+}
+
+void MIDIDriverALSAMidi::lock() const {
+
+ if (mutex)
+ mutex->lock();
+}
+
+void MIDIDriverALSAMidi::unlock() const {
+
+ if (mutex)
+ mutex->unlock();
+}
+
+PoolStringArray MIDIDriverALSAMidi::get_connected_inputs() {
+
+ PoolStringArray list;
+
+ lock();
+ for (int i = 0; i < connected_inputs.size(); i++) {
+ snd_rawmidi_t *midi_in = connected_inputs[i];
+ snd_rawmidi_info_t *info;
+
+ snd_rawmidi_info_malloc(&info);
+ snd_rawmidi_info(midi_in, info);
+ list.push_back(snd_rawmidi_info_get_name(info));
+ snd_rawmidi_info_free(info);
+ }
+ unlock();
+
+ return list;
+}
+
+MIDIDriverALSAMidi::MIDIDriverALSAMidi() {
+
+ mutex = NULL;
+ thread = NULL;
+
+ exit_thread = false;
+}
+
+MIDIDriverALSAMidi::~MIDIDriverALSAMidi() {
+
+ close();
+}
+
+#endif
diff --git a/drivers/alsamidi/alsa_midi.h b/drivers/alsamidi/alsa_midi.h
new file mode 100644
index 0000000000..90e458a365
--- /dev/null
+++ b/drivers/alsamidi/alsa_midi.h
@@ -0,0 +1,69 @@
+/*************************************************************************/
+/* alsa_midi.h */
+/*************************************************************************/
+/* This file is part of: */
+/* GODOT ENGINE */
+/* https://godotengine.org */
+/*************************************************************************/
+/* Copyright (c) 2007-2018 Juan Linietsky, Ariel Manzur. */
+/* Copyright (c) 2014-2018 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. */
+/*************************************************************************/
+
+#ifdef ALSAMIDI_ENABLED
+
+#ifndef ALSA_MIDI_H
+#define ALSA_MIDI_H
+
+#include <alsa/asoundlib.h>
+#include <stdio.h>
+
+#include "core/os/mutex.h"
+#include "core/os/thread.h"
+#include "core/vector.h"
+#include "os/midi_driver.h"
+
+class MIDIDriverALSAMidi : public MIDIDriver {
+
+ Thread *thread;
+ Mutex *mutex;
+
+ Vector<snd_rawmidi_t *> connected_inputs;
+
+ bool exit_thread;
+
+ static void thread_func(void *p_udata);
+
+ void lock() const;
+ void unlock() const;
+
+public:
+ virtual Error open();
+ virtual void close();
+
+ virtual PoolStringArray get_connected_inputs();
+
+ MIDIDriverALSAMidi();
+ virtual ~MIDIDriverALSAMidi();
+};
+
+#endif
+#endif
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