add pitchscaler cmd

doc/README.md

@@ -83,6 +83,12 @@ Parameters:
  - `law_freq`: LFO frequency (Hz), 2..30, default 9
  - `attendb`: Output attenuation (dB), -20..0, default 0
 
+## `pitchscaler split index mult`
+
+Runs the Higher Quality Pitch Scaler from the SWH plugins.
+
+The `mult` parameter is the pitch coefficient, range from 0.5..2, default 1.
+
 ## TODO `echo split index delay`
 
 Run an echo filter on the given loaded file.

examples/pitch.scri

@@ -0,0 +1,4 @@
+load :0;
+pitchscaler 3 1 1.0000000000001;
+pitchscaler 10 8 0.999999999999;
+quicksave;

src/lang.zig

@@ -19,6 +19,7 @@ pub const CommandType = enum {
     Phaser,
     Mbeq,
     Chorus,
+    PitchScaler,
 };
 
 pub const Command = struct {
@@ -126,6 +127,7 @@ pub const Lang = struct {
         _ = try self.keywords.put("mbeq", .Mbeq);
         _ = try self.keywords.put("phaser", .Phaser);
         _ = try self.keywords.put("chorus", .Chorus);
+        _ = try self.keywords.put("pitchscaler", .PitchScaler);
     }
 
     pub fn parse(self: *Lang, data: []const u8) !CommandList {

src/runner.zig

@@ -173,11 +173,7 @@ pub const Runner = struct {
         try image.runPlugin("http://plugin.org.uk/swh-plugins/lfoPhaser", position, params);
     }
 
-    fn mbeqCmd(
-        self: *Runner,
-        position: Position,
-        bands: []const f32,
-    ) !void {
+    fn mbeqCmd(self: *Runner, position: Position, bands: []const f32) !void {
         var image = try self.getImage();
         var params = ParamList.init(self.allocator);
         defer params.deinit();
@@ -193,15 +189,16 @@ pub const Runner = struct {
         try image.runPlugin("http://plugin.org.uk/swh-plugins/mbeq", position, params);
     }
 
-    fn chorusCmd(
-        self: *Runner,
-        pos: Position,
-        params: ParamList,
-    ) !void {
+    fn chorusCmd(self: *Runner, pos: Position, params: ParamList) !void {
         var image = try self.getImage();
         try image.runPlugin("http://plugin.org.uk/swh-plugins/multivoiceChorus", pos, params);
     }
 
+    fn pitchScalerCmd(self: *Runner, pos: Position, params: ParamList) !void {
+        var image = try self.getImage();
+        try image.runPlugin("http://plugin.org.uk/swh-plugins/pitchScaleHQ", pos, params);
+    }
+
     fn runCommand(self: *Runner, cmd: *lang.Command) !void {
         var params = ParamList.init(self.allocator);
         defer params.deinit();
@@ -267,6 +264,12 @@ pub const Runner = struct {
                 try self.chorusCmd(pos, params);
             },
 
+            .PitchScaler => blk: {
+                const pos = try cmd.consumePosition();
+                try cmd.appendParam(&params, "mult", 2);
+                try self.pitchScalerCmd(pos, params);
+            },
+
             else => blk: {
                 std.debug.warn("Unsupported command: {}\n", cmd.command);
                 break :blk RunError.UnknownCommand;