Create prototype MIDI importer

Pixi/Audio/AudioTools.cs

@@ -0,0 +1,7 @@
+namespace Pixi.Audio
+{
+    public static class AudioTools
+    {
+        
+    }
+}

Pixi/Audio/MidiImporter.cs

@@ -0,0 +1,147 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+using GamecraftModdingAPI;
+using GamecraftModdingAPI.Players;
+using GamecraftModdingAPI.Blocks;
+using GamecraftModdingAPI.Utility;
+using Melanchall.DryWetMidi.Core;
+using Melanchall.DryWetMidi.Devices;
+using Melanchall.DryWetMidi.Interaction;
+
+using Pixi.Common;
+using Unity.Mathematics;
+
+namespace Pixi.Audio
+{
+    public class MidiImporter : Importer
+    {
+        public int Priority { get; } = 1;
+        public bool Optimisable { get; } = false;
+        public string Name { get; } = "Midi~Spell";
+        public BlueprintProvider BlueprintProvider { get; } = null;
+        
+        private Dictionary<string, MidiFile> openFiles = new Dictionary<string, MidiFile>();
+
+        public static bool ThreeDee = false;
+
+        public static float Spread = 1f;
+        
+        public bool Qualifies(string name)
+        {
+            return name.EndsWith(".mid", StringComparison.InvariantCultureIgnoreCase);
+        }
+
+        public BlockJsonInfo[] Import(string name)
+        {
+            MidiFile midi = MidiFile.Read(name);
+            openFiles[name] = midi;
+            Logging.MetaLog($"Found {midi.GetNotes().Count()} notes over {midi.GetDuration<MidiTimeSpan>().TimeSpan} time units");
+            BlockJsonInfo[] blocks = new BlockJsonInfo[(midi.GetNotes().Count() * 2) + 2];
+#if DEBUG
+            // test (for faster, but incomplete, imports)
+            if (blocks.Length > 102) blocks = new BlockJsonInfo[102];
+#endif
+            // convert Midi notes to sfx blocks
+            Dictionary<long, uint> breadthCache = new Dictionary<long, uint>();
+            uint count = 0;
+            foreach (Note n in midi.GetNotes())
+            {
+                // even blocks are counters,
+                long microTime = n.TimeAs<MetricTimeSpan>(midi.GetTempoMap()).TotalMicroseconds;
+                float breadth = 1f;
+                if (breadthCache.ContainsKey(microTime))
+                {
+                    breadth += breadthCache[microTime]++;
+                }
+                else
+                {
+                    breadthCache[microTime] = 1;
+                }
+                blocks[count] = new BlockJsonInfo
+                {
+                    name = GamecraftModdingAPI.Blocks.BlockIDs.Timer.ToString(),
+                    position = new float[] { breadth * 0.2f * Spread, 2 * 0.2f, microTime * 0.00001f * 0.2f * Spread},
+                    rotation = new float[] { 0, 0, 0},
+                    color = new float[] { -1, -1, -1},
+                    scale = new float[] { 1, 1, 1},
+                };
+                count++;
+                blocks[count] = new BlockJsonInfo
+                {
+                    name = GamecraftModdingAPI.Blocks.BlockIDs.SFXBlockInstrument.ToString(),
+                    position = new float[] { breadth * 0.2f * Spread, 1 * 0.2f, microTime * 0.00001f * 0.2f * Spread},
+                    rotation = new float[] { 0, 0, 0},
+                    color = new float[] { -1, -1, -1},
+                    scale = new float[] { 1, 1, 1},
+                };
+                count++;
+#if DEBUG
+                // test (for faster, but incomplete, imports)
+                if (count >= 100) break;
+#endif
+            }
+            // playback IO (reset & play)
+            blocks[count] = new BlockJsonInfo
+            {
+                name = GamecraftModdingAPI.Blocks.BlockIDs.SimpleConnector.ToString(),
+                position = new float[] { -0.2f, 2 * 0.2f, 0},
+                rotation = new float[] { 0, 0, 0},
+                color = new float[] { -1, -1, -1},
+                scale = new float[] { 1, 1, 1},
+            }; // play is second last (placed above reset)
+            count++;
+            blocks[count] = new BlockJsonInfo
+            {
+                name = GamecraftModdingAPI.Blocks.BlockIDs.SimpleConnector.ToString(),
+                position = new float[] { -0.2f, 1 * 0.2f, 0},
+                rotation = new float[] { 0, 0, 0},
+                color = new float[] { -1, -1, -1},
+                scale = new float[] { 1, 1, 1},
+            }; // reset is last (placed below play)
+            return blocks;
+        }
+
+        public void PreProcess(string name, ref ProcessedVoxelObjectNotation[] blocks)
+        {
+            Player p = new Player(PlayerType.Local);
+            float3 pos = p.Position;
+            for (int i = 0; i < blocks.Length; i++)
+            {
+                blocks[i].position += pos;
+            }
+        }
+
+        public void PostProcess(string name, ref Block[] blocks)
+        {
+            // playback IO
+            LogicGate startConnector = blocks[blocks.Length - 2].Specialise<LogicGate>();
+            LogicGate resetConnector = blocks[blocks.Length - 1].Specialise<LogicGate>();
+            uint count = 0;
+            foreach (Note n in openFiles[name].GetNotes())
+            {
+                // set timing info
+                Timer t = blocks[count].Specialise<Timer>();
+                t.Start = 0;
+                t.End = n.TimeAs<MetricTimeSpan>(openFiles[name].GetTempoMap()).TotalMicroseconds * 0.000001f;
+                count++;
+                // set notes info
+                SfxBlock sfx = blocks[count].Specialise<SfxBlock>();
+                sfx.Pitch = n.NoteNumber - 60; // In MIDI, 60 is middle C, but GC uses 0 for middle C
+                sfx.TrackIndex = 5; // Piano
+                sfx.Is3D = ThreeDee;
+                count++;
+                // connect wires
+                t.Connect(0, sfx, 0);
+                startConnector.Connect(0, t, 0);
+                resetConnector.Connect(0, t, 2);
+#if DEBUG
+                // test (for faster, but incomplete, imports)
+                if (count >= 100) break;
+#endif
+            }
+            openFiles.Remove(name);
+        }
+    }
+}

Pixi/Pixi.csproj

@@ -3,7 +3,7 @@
   <PropertyGroup>
     <TargetFramework>net472</TargetFramework>
     <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
-    <Version>1.0.1</Version>
+    <Version>1.1.0</Version>
     <Authors>NGnius</Authors>
     <PackageLicenseExpression>MIT</PackageLicenseExpression>
     <PackageProjectUrl>https://git.exmods.org/NGnius/Pixi</PackageProjectUrl>
@@ -827,4 +827,13 @@
     <EmbeddedResource Include="cubes-id.json" />
     <EmbeddedResource Include="blueprints.json" />
   </ItemGroup>
+  <ItemGroup>
+    <PackageReference Include="ILRepack" Version="2.0.18" />
+    <PackageReference Include="Melanchall.DryWetMidi" Version="5.1.1" />
+  </ItemGroup>
+
+<Target Name="StaticLinkMergeAfterBuild" AfterTargets="Build">
+    <Exec Command="$(PkgILRepack)\tools\ILRepack.exe /ndebug /out:bin\$(Configuration)\net472\Pixi.dll bin\$(Configuration)\net472\Pixi.dll bin\$(Configuration)\net472\Melanchall.DryWetMidi.dll" />
+  </Target>
+
 </Project>

Pixi/PixiPlugin.cs

@@ -8,7 +8,7 @@ using Unity.Mathematics; // float3
 
 using IllusionPlugin;
 using GamecraftModdingAPI.Utility;
-
+using Pixi.Audio;
 using Pixi.Common;
 using Pixi.Images;
 using Pixi.Robots;
@@ -54,6 +54,8 @@ namespace Pixi
 			// Development functionality
 			RobotCommands.CreatePartDumpCommand();
 #endif
+			// Audio functionality
+			root.Inject(new MidiImporter());
 		}
 	}
 }

README.md

@@ -99,6 +99,8 @@ Robot parsing uses information from [RobocraftAssembler](https://github.com/dddo
 
 Gamecraft interactions use the [GamecraftModdingAPI](https://git.exmods.org/modtainers/GamecraftModdingAPI). 
 
+MIDI file processing uses an integrated copy of melanchall's [DryWetMidi](https://github.com/melanchall/drywetmidi) library, licensed under the [MIT License](https://github.com/melanchall/drywetmidi/blob/develop/LICENSE).
+
 Thanks to **TheGreenGoblin** and their Python app for converting images to coloured square characters, which inspired the PixiConsole and PixiText commands.
 
 Thanks to **Mr. Rotor** for all of the Robocraft blocks used in the PixiBot and PixiBotFile commands.