add reverb command

src/lang.zig

@@ -20,6 +20,7 @@ pub const CommandType = enum {
     Mbeq,
     Chorus,
     PitchScaler,
+    Reverb,
 };
 
 pub const Command = struct {
@@ -128,6 +129,7 @@ pub const Lang = struct {
         _ = try self.keywords.put("phaser", .Phaser);
         _ = try self.keywords.put("chorus", .Chorus);
         _ = try self.keywords.put("pitchscaler", .PitchScaler);
+        _ = try self.keywords.put("reverb", .Reverb);
     }
 
     pub fn parse(self: *Lang, data: []const u8) !CommandList {

src/plugin.zig

@@ -74,7 +74,7 @@ pub const RunContext = struct {
 
         return RunContext{
             .in_buf = try allocator.alloc(f32, 1),
-            .out_buf = try allocator.alloc(f32, 1),
+            .out_buf = try allocator.alloc(f32, 2),
             .instance = instance.?,
         };
     }

src/runner.zig

@@ -199,6 +199,11 @@ pub const Runner = struct {
         try image.runPlugin("http://plugin.org.uk/swh-plugins/pitchScaleHQ", pos, params);
     }
 
+    fn reverbCmd(self: *Runner, pos: Position, params: ParamList) !void {
+        var image = try self.getImage();
+        try image.runPlugin("http://invadarecords.com/plugins/lv2/erreverb/mono", pos, params);
+    }
+
     fn runCommand(self: *Runner, cmd: *lang.Command) !void {
         var params = ParamList.init(self.allocator);
         defer params.deinit();
@@ -270,6 +275,23 @@ pub const Runner = struct {
                 try self.pitchScalerCmd(pos, params);
             },
 
+            .Reverb => blk: {
+                const pos = try cmd.consumePosition();
+
+                try cmd.appendParam(&params, "bypass", 2);
+                try cmd.appendParam(&params, "roomLength", 3);
+                try cmd.appendParam(&params, "roomHeight", 4);
+                try cmd.appendParam(&params, "sourceLR", 5);
+                try cmd.appendParam(&params, "sourceFB", 6);
+                try cmd.appendParam(&params, "listLR", 7);
+                try cmd.appendParam(&params, "listFB", 8);
+                try cmd.appendParam(&params, "hpf", 9);
+                try cmd.appendParam(&params, "warmth", 10);
+                try cmd.appendParam(&params, "diffusion", 11);
+
+                try self.reverbCmd(pos, params);
+            },
+
             else => blk: {
                 std.debug.warn("Unsupported command: {}\n", cmd.command);
                 break :blk RunError.UnknownCommand;