Added a new MIDIDriver class

6 files changed, 353 insertions, 0 deletions

diff --git a/core/os/input_event.cpp b/core/os/input_event.cpp
index ca6446d015..e94ccb4f48 100644
--- a/core/os/input_event.cpp
+++ b/core/os/input_event.cpp
@@ -1080,3 +1080,122 @@ InputEventPanGesture::InputEventPanGesture() {
 
 	delta = Vector2(0, 0);
 }
+/////////////////////////////
+
+void InputEventMIDI::set_channel(const int p_channel) {
+
+	channel = p_channel;
+}
+
+int InputEventMIDI::get_channel() const {
+	return channel;
+}
+
+void InputEventMIDI::set_message(const int p_message) {
+
+	message = p_message;
+}
+
+int InputEventMIDI::get_message() const {
+	return message;
+}
+
+void InputEventMIDI::set_pitch(const int p_pitch) {
+
+	pitch = p_pitch;
+}
+
+int InputEventMIDI::get_pitch() const {
+	return pitch;
+}
+
+void InputEventMIDI::set_velocity(const int p_velocity) {
+
+	velocity = p_velocity;
+}
+
+int InputEventMIDI::get_velocity() const {
+	return velocity;
+}
+
+void InputEventMIDI::set_instrument(const int p_instrument) {
+
+	instrument = p_instrument;
+}
+
+int InputEventMIDI::get_instrument() const {
+	return instrument;
+}
+
+void InputEventMIDI::set_pressure(const int p_pressure) {
+
+	pressure = p_pressure;
+}
+
+int InputEventMIDI::get_pressure() const {
+	return pressure;
+}
+
+void InputEventMIDI::set_controller_number(const int p_controller_number) {
+
+	controller_number = p_controller_number;
+}
+
+int InputEventMIDI::get_controller_number() const {
+	return controller_number;
+}
+
+void InputEventMIDI::set_controller_value(const int p_controller_value) {
+
+	controller_value = p_controller_value;
+}
+
+int InputEventMIDI::get_controller_value() const {
+	return controller_value;
+}
+
+String InputEventMIDI::as_text() const {
+
+	return "InputEventMIDI : channel=(" + itos(get_channel()) + "), message=(" + itos(get_message()) + ")";
+}
+
+void InputEventMIDI::_bind_methods() {
+
+	ClassDB::bind_method(D_METHOD("set_channel", "channel"), &InputEventMIDI::set_channel);
+	ClassDB::bind_method(D_METHOD("get_channel"), &InputEventMIDI::get_channel);
+	ClassDB::bind_method(D_METHOD("set_message", "message"), &InputEventMIDI::set_message);
+	ClassDB::bind_method(D_METHOD("get_message"), &InputEventMIDI::get_message);
+	ClassDB::bind_method(D_METHOD("set_pitch", "pitch"), &InputEventMIDI::set_pitch);
+	ClassDB::bind_method(D_METHOD("get_pitch"), &InputEventMIDI::get_pitch);
+	ClassDB::bind_method(D_METHOD("set_velocity", "velocity"), &InputEventMIDI::set_velocity);
+	ClassDB::bind_method(D_METHOD("get_velocity"), &InputEventMIDI::get_velocity);
+	ClassDB::bind_method(D_METHOD("set_instrument", "instrument"), &InputEventMIDI::set_instrument);
+	ClassDB::bind_method(D_METHOD("get_instrument"), &InputEventMIDI::get_instrument);
+	ClassDB::bind_method(D_METHOD("set_pressure", "pressure"), &InputEventMIDI::set_pressure);
+	ClassDB::bind_method(D_METHOD("get_pressure"), &InputEventMIDI::get_pressure);
+	ClassDB::bind_method(D_METHOD("set_controller_number", "controller_number"), &InputEventMIDI::set_controller_number);
+	ClassDB::bind_method(D_METHOD("get_controller_number"), &InputEventMIDI::get_controller_number);
+	ClassDB::bind_method(D_METHOD("set_controller_value", "controller_value"), &InputEventMIDI::set_controller_value);
+	ClassDB::bind_method(D_METHOD("get_controller_value"), &InputEventMIDI::get_controller_value);
+
+	ADD_PROPERTY(PropertyInfo(Variant::INT, "channel"), "set_channel", "get_channel");
+	ADD_PROPERTY(PropertyInfo(Variant::INT, "message"), "set_message", "get_message");
+	ADD_PROPERTY(PropertyInfo(Variant::INT, "pitch"), "set_pitch", "get_pitch");
+	ADD_PROPERTY(PropertyInfo(Variant::INT, "velocity"), "set_velocity", "get_velocity");
+	ADD_PROPERTY(PropertyInfo(Variant::INT, "instrument"), "set_instrument", "get_instrument");
+	ADD_PROPERTY(PropertyInfo(Variant::INT, "pressure"), "set_pressure", "get_pressure");
+	ADD_PROPERTY(PropertyInfo(Variant::INT, "controller_number"), "set_controller_number", "get_controller_number");
+	ADD_PROPERTY(PropertyInfo(Variant::INT, "controller_value"), "set_controller_value", "get_controller_value");
+}
+
+InputEventMIDI::InputEventMIDI() {
+
+	channel = 0;
+	message = 0;
+	pitch = 0;
+	velocity = 0;
+	instrument = 0;
+	pressure = 0;
+	controller_number = 0;
+	controller_value = 0;
+}
diff --git a/core/os/input_event.h b/core/os/input_event.h
index bd1a85ce29..04126fee77 100644
--- a/core/os/input_event.h
+++ b/core/os/input_event.h
@@ -140,6 +140,16 @@ enum JoystickList {
 	JOY_ANALOG_R2 = JOY_AXIS_7,
 };
 
+enum MidiMessageList {
+	MIDI_MESSAGE_NOTE_OFF = 0x8,
+	MIDI_MESSAGE_NOTE_ON = 0x9,
+	MIDI_MESSAGE_AFTERTOUCH = 0xA,
+	MIDI_MESSAGE_CONTROL_CHANGE = 0xB,
+	MIDI_MESSAGE_PROGRAM_CHANGE = 0xC,
+	MIDI_MESSAGE_CHANNEL_PRESSURE = 0xD,
+	MIDI_MESSAGE_PITCH_BEND = 0xE,
+};
+
 /**
  * Input Modifier Status
  * for keyboard/mouse events.
@@ -525,4 +535,50 @@ public:
 
 	InputEventPanGesture();
 };
+
+class InputEventMIDI : public InputEvent {
+	GDCLASS(InputEventMIDI, InputEvent)
+
+	int channel;
+	int message;
+	int pitch;
+	int velocity;
+	int instrument;
+	int pressure;
+	int controller_number;
+	int controller_value;
+
+protected:
+	static void _bind_methods();
+
+public:
+	void set_channel(const int p_channel);
+	int get_channel() const;
+
+	void set_message(const int p_message);
+	int get_message() const;
+
+	void set_pitch(const int p_pitch);
+	int get_pitch() const;
+
+	void set_velocity(const int p_velocity);
+	int get_velocity() const;
+
+	void set_instrument(const int p_instrument);
+	int get_instrument() const;
+
+	void set_pressure(const int p_pressure);
+	int get_pressure() const;
+
+	void set_controller_number(const int p_controller_number);
+	int get_controller_number() const;
+
+	void set_controller_value(const int p_controller_value);
+	int get_controller_value() const;
+
+	virtual String as_text() const;
+
+	InputEventMIDI();
+};
+
 #endif
diff --git a/core/os/midi_driver.cpp b/core/os/midi_driver.cpp
new file mode 100644
index 0000000000..7b4f84473c
--- /dev/null
+++ b/core/os/midi_driver.cpp
@@ -0,0 +1,107 @@
+/*************************************************************************/
+/*  midi_driver.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.                */
+/*************************************************************************/
+
+#include "midi_driver.h"
+
+#include "main/input_default.h"
+#include "os/os.h"
+
+MIDIDriver *MIDIDriver::singleton = NULL;
+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();
+
+	if (length >= 1) {
+		event->set_channel(data[0] & 0xF);
+		event->set_message(data[0] >> 4);
+	}
+
+	switch (event->get_message()) {
+		case MIDI_MESSAGE_AFTERTOUCH:
+			if (length >= 3) {
+				event->set_pitch(data[1]);
+				event->set_pressure(data[2]);
+			}
+			break;
+
+		case MIDI_MESSAGE_CONTROL_CHANGE:
+			if (length >= 3) {
+				event->set_controller_number(data[1]);
+				event->set_controller_value(data[2]);
+			}
+			break;
+
+		case MIDI_MESSAGE_NOTE_ON:
+		case MIDI_MESSAGE_NOTE_OFF:
+		case MIDI_MESSAGE_PITCH_BEND:
+			if (length >= 3) {
+				event->set_pitch(data[1]);
+				event->set_velocity(data[2]);
+			}
+			break;
+
+		case MIDI_MESSAGE_PROGRAM_CHANGE:
+			if (length >= 2) {
+				event->set_instrument(data[1]);
+			}
+			break;
+
+		case MIDI_MESSAGE_CHANNEL_PRESSURE:
+			if (length >= 2) {
+				event->set_pressure(data[1]);
+			}
+			break;
+	}
+
+	InputDefault *id = Object::cast_to<InputDefault>(Input::get_singleton());
+	id->parse_input_event(event);
+}
+
+PoolStringArray MIDIDriver::get_connected_inputs() {
+
+	PoolStringArray list;
+	return list;
+}
+
+MIDIDriver::MIDIDriver() {
+
+	set_singleton();
+}
diff --git a/core/os/midi_driver.h b/core/os/midi_driver.h
new file mode 100644
index 0000000000..1a3a67a411
--- /dev/null
+++ b/core/os/midi_driver.h
@@ -0,0 +1,59 @@
+/*************************************************************************/
+/*  midi_driver.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.                */
+/*************************************************************************/
+
+#ifndef MIDI_DRIVER_H
+#define MIDI_DRIVER_H
+
+#include "core/variant.h"
+#include "typedefs.h"
+/**
+ * Multi-Platform abstraction for accessing to MIDI.
+ */
+
+class MIDIDriver {
+
+	static MIDIDriver *singleton;
+
+public:
+	static MIDIDriver *get_singleton();
+	void set_singleton();
+
+	virtual Error open() = 0;
+	virtual void close() = 0;
+
+	virtual PoolStringArray get_connected_inputs();
+
+	static void receive_input_packet(uint64_t timestamp, uint8_t *data, uint32_t length);
+
+	MIDIDriver();
+	virtual ~MIDIDriver() {}
+};
+
+#endif
diff --git a/core/os/os.cpp b/core/os/os.cpp
index 89866e4044..8dcf0990fc 100644
--- a/core/os/os.cpp
+++ b/core/os/os.cpp
@@ -33,6 +33,7 @@
 #include "dir_access.h"
 #include "input.h"
 #include "os/file_access.h"
+#include "os/midi_driver.h"
 #include "project_settings.h"
 #include "servers/audio_server.h"
 #include "version_generated.gen.h"
@@ -672,6 +673,15 @@ List<String> OS::get_restart_on_exit_arguments() const {
 	return restart_commandline;
 }
 
+PoolStringArray OS::get_connected_midi_inputs() {
+
+	if (MIDIDriver::get_singleton())
+		return MIDIDriver::get_singleton()->get_connected_inputs();
+
+	PoolStringArray list;
+	return list;
+}
+
 OS::OS() {
 	void *volatile stack_bottom;
 
diff --git a/core/os/os.h b/core/os/os.h
index 4e0cb003fb..dd783408e8 100644
--- a/core/os/os.h
+++ b/core/os/os.h
@@ -189,6 +189,8 @@ public:
 	virtual int get_audio_driver_count() const;
 	virtual const char *get_audio_driver_name(int p_driver) const;
 
+	virtual PoolStringArray get_connected_midi_inputs();
+
 	virtual int get_screen_count() const { return 1; }
 	virtual int get_current_screen() const { return 0; }
 	virtual void set_current_screen(int p_screen) {}