add gverb cmd

doc/README.md

@@ -276,3 +276,15 @@ other presets:
 Fast Overdrive from SWH plugins.
 
  - drive: 1..3, default 1
+
+## `gverb split index roomsize revtime damping drylevel earlylevel taillevel`
+
+GVerb algorithm from SWH plugins.
+
+ - roomsize (meters): 1..300, default 75.75
+ - revtime (reverb time, seconds): 0.1..30, default 7.575
+ - damping: 0..1, default 0.5
+ - inputbandwidth: 0..1, default 0.75
+ - drylevel (dB): -70..0, default 0
+ - earlylevel (dB): -70..0, default 0
+ - taillevel (dB): -70..0, default -17.5

examples/gverb.scri

@@ -0,0 +1,3 @@
+load :0;
+gverb 3 1 75.75 7.575 0.5 0.75 0 0 -17.5;
+quicksave;

src/lang.zig

@@ -35,6 +35,7 @@ pub const CommandType = enum {
     DynComp,
     ThruZero,
     Foverdrive,
+    Gverb,
 
     Noise,
     WildNoise,
@@ -199,6 +200,7 @@ pub const Lang = struct {
         _ = try self.keywords.put("talkbox", .TalkBox);
         _ = try self.keywords.put("thruzero", .ThruZero);
         _ = try self.keywords.put("foverdrive", .Foverdrive);
+        _ = try self.keywords.put("gverb", .Gverb);
 
         // custom implementations (not lv2)
         _ = try self.keywords.put("noise", .Noise);

src/printer.zig

@@ -29,6 +29,7 @@ pub fn printList(list: langs.CommandList, stream: var) !void {
             .DynComp => "dyncomp",
             .ThruZero => "thruzero",
             .Foverdrive => "foverdrive",
+            .Gverb => "gverb",
 
             .Noise => "noise",
             .WildNoise => "wildnoise",

src/runner.zig

@@ -339,6 +339,11 @@ pub const Runner = struct {
         try image.runPlugin("http://drobilla.net/plugins/mda/ThruZero", pos, params);
     }
 
+    fn gverbCmd(self: *Runner, pos: Position, params: ParamList) !void {
+        var image = try self.getImage();
+        try image.runPlugin("http://plugin.org.uk/swh-plugins/gverb", pos, params);
+    }
+
     fn runCommand(self: *Runner, cmd: *lang.Command) !void {
         var params = ParamList.init(self.allocator);
         defer params.deinit();
@@ -612,6 +617,18 @@ pub const Runner = struct {
                 try self.foverdriveCmd(pos, params);
             },
 
+            .Gverb => {
+                const pos = try cmd.consumePosition();
+                try cmd.appendParam(&params, "roomsize");
+                try cmd.appendParam(&params, "revtime");
+                try cmd.appendParam(&params, "damping");
+                try cmd.appendParam(&params, "inputbandwidth");
+                try cmd.appendParam(&params, "drylevel");
+                try cmd.appendParam(&params, "earlylevel");
+                try cmd.appendParam(&params, "taillevel");
+                try self.gverbCmd(pos, params);
+            },
+
             else => blk: {
                 std.debug.warn("Unsupported command: {}\n", .{cmd.command});
                 break :blk RunError.UnknownCommand;