Adds playable instruments, IDropped, IHandSelected and IHandDese… (#368)

* Instrument test.

* Midi stuff

* Some more work

* This actually works now!

* update

* Midi Audio works!

* Lots of stuff, and cool interfaces for items

* Update

* Fix a few things

* It just works

* Move textures to another folder, remove placeholder description from instruments

* Fix warning

* Use renderer enum

* Instruments now use DisposeRenderer method, and send MidiEvents as they receive them. Deletes InstrumentSystem whoo.

* Fix incorrect sprite paths

* Instruments take midi file size check into account when enabling/disabling midi playback buttons

* Fix crash when pressing drop on empty hand.

* Use new renderer return values for midi/input

* Xylophones are no longer handheld instruments, fix their sprites.

* Use new API

* Remove nfluidsynth from solution

* Timing information

* Use IGameTiming.CurTime for timestamps instead

Content.Client/GameObjects/Components/Instruments/InstrumentComponent.cs

@@ -0,0 +1,175 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Threading;
+using Content.Shared.GameObjects.Components.Instruments;
+using OpenTK.Platform.Windows;
+using Robust.Shared.GameObjects;
+using Robust.Client.Audio.Midi;
+using Robust.Client.GameObjects.EntitySystems;
+using Robust.Client.Interfaces.Graphics;
+using Robust.Client.Interfaces.UserInterface;
+using Robust.Client.Reflection;
+using Robust.Shared.Audio.Midi;
+using Robust.Shared.Interfaces.GameObjects;
+using Robust.Shared.Interfaces.Network;
+using Robust.Shared.Interfaces.Reflection;
+using Robust.Shared.Interfaces.Serialization;
+using Robust.Shared.Interfaces.Timing;
+using Robust.Shared.IoC;
+using Robust.Shared.Serialization;
+using Robust.Shared.ViewVariables;
+using Timer = Robust.Shared.Timers.Timer;
+
+
+namespace Content.Client.GameObjects.Components.Instruments
+{
+    [RegisterComponent]
+    public class InstrumentComponent : SharedInstrumentComponent
+    {
+        /// <summary>
+        ///     Called when a midi song stops playing.
+        /// </summary>
+        public event Action OnMidiPlaybackEnded;
+
+#pragma warning disable 649
+        [Dependency] private IMidiManager _midiManager;
+        [Dependency] private IFileDialogManager _fileDialogManager;
+        [Dependency] private readonly IGameTiming _timing;
+#pragma warning restore 649
+
+        private IMidiRenderer _renderer;
+        private int _instrumentProgram = 1;
+
+        /// <summary>
+        ///     A queue of MidiEvents to be sent to the server.
+        /// </summary>
+        private Queue<MidiEvent> _eventQueue = new Queue<MidiEvent>();
+
+        /// <summary>
+        ///     Whether a midi song will loop or not.
+        /// </summary>
+        [ViewVariables(VVAccess.ReadWrite)]
+        public bool LoopMidi
+        {
+            get => _renderer.LoopMidi;
+            set => _renderer.LoopMidi = value;
+        }
+
+        /// <summary>
+        ///     Changes the instrument the midi renderer will play.
+        /// </summary>
+        [ViewVariables(VVAccess.ReadWrite)]
+        public int InstrumentProgram
+        {
+            get => _instrumentProgram;
+            set {
+                _instrumentProgram = value;
+                _renderer.MidiProgram = _instrumentProgram;
+            }
+        }
+
+        /// <summary>
+        ///     Whether there's a midi song being played or not.
+        /// </summary>
+        [ViewVariables]
+        public bool IsMidiOpen => _renderer.Status == MidiRendererStatus.File;
+
+        /// <summary>
+        ///     Whether the midi renderer is listening for midi input or not.
+        /// </summary>
+        [ViewVariables]
+        public bool IsInputOpen => _renderer.Status == MidiRendererStatus.Input;
+
+        public override void Initialize()
+        {
+            base.Initialize();
+            IoCManager.InjectDependencies(this);
+            _renderer = _midiManager.GetNewRenderer();
+            _renderer.MidiProgram = _instrumentProgram;
+            _renderer.TrackingEntity = Owner;
+            _renderer.OnMidiPlayerFinished += () => { OnMidiPlaybackEnded?.Invoke(); };
+        }
+
+        protected override void Shutdown()
+        {
+            base.Shutdown();
+            _renderer?.Dispose();
+        }
+
+        public override void ExposeData(ObjectSerializer serializer)
+        {
+            base.ExposeData(serializer);
+            serializer.DataField(ref _instrumentProgram, "program", 1);
+        }
+
+        public override void HandleMessage(ComponentMessage message, INetChannel netChannel = null, IComponent component = null)
+        {
+            base.HandleMessage(message, netChannel, component);
+            switch (message)
+            {
+                case InstrumentMidiEventMessage midiEventMessage:
+                    // If we're the ones sending the MidiEvents, we ignore this message.
+                    if (IsInputOpen || IsMidiOpen) break;
+                    Timer.Spawn((int) (500 + _timing.CurTime.TotalMilliseconds - midiEventMessage.Timestamp),
+                        () => _renderer.SendMidiEvent(midiEventMessage.MidiEvent));
+                    break;
+
+                case InstrumentStopMidiMessage _:
+                    _renderer.StopAllNotes();
+                    if(IsInputOpen) CloseInput();
+                    if(IsMidiOpen) CloseMidi();
+                    break;
+            }
+        }
+
+        /// <inheritdoc cref="MidiRenderer.OpenInput"/>
+        public bool OpenInput()
+        {
+            if (_renderer.OpenInput())
+            {
+                _renderer.OnMidiEvent += RendererOnMidiEvent;
+                return true;
+            }
+
+            return false;
+        }
+
+        /// <inheritdoc cref="MidiRenderer.CloseInput"/>
+        public bool CloseInput()
+        {
+            if (!_renderer.CloseInput()) return false;
+            _renderer.OnMidiEvent -= RendererOnMidiEvent;
+            return true;
+
+        }
+
+        /// <inheritdoc cref="MidiRenderer.OpenMidi(string)"/>
+        public bool OpenMidi(string filename)
+        {
+            if (!_renderer.OpenMidi(filename)) return false;
+            _renderer.OnMidiEvent += RendererOnMidiEvent;
+            return true;
+
+        }
+
+        /// <inheritdoc cref="MidiRenderer.CloseMidi"/>
+        public bool CloseMidi()
+        {
+            if (!_renderer.CloseMidi()) return false;
+            _renderer.OnMidiEvent -= RendererOnMidiEvent;
+            return true;
+
+        }
+
+        /// <summary>
+        ///     Called whenever the renderer receives a midi event.
+        /// </summary>
+        /// <param name="midiEvent">The received midi event</param>
+        private void RendererOnMidiEvent(MidiEvent midiEvent)
+        {
+            SendNetworkMessage(new InstrumentMidiEventMessage(midiEvent, _timing.CurTime.TotalMilliseconds));
+        }
+    }
+}