add revdelay cmd

doc/README.md

@@ -129,6 +129,15 @@ Parameters:
  - `click`: Crackle, 0..1, default 0
  - `wear`: Wear, 0..1, default 0
 
+## `revdelay split index delay_time dry_level wet_level feedback xfade_samp` 
+
+Parameters:
+ - `delay_time`: Delay time (s), 0..5, default 0
+ - `dry_level`: Dry Level (dB), -70..0, default 0
+ - `wet_level`: Wet Level (dB), -70..0, default 0,
+ - `feedback`: Feedback, 0..1, default 0
+ - `xfade_samp`: Crossfade samples (int), 0..5000, default 1250
+
 ## TODO `echo split index delay`
 
 Run an echo filter on the given loaded file.

examples/revdelay.scri

@@ -0,0 +1,3 @@
+load :0;
+revdelay 3 1 0 0 0 0 1250;
+quicksave;

src/lang.zig

@@ -25,6 +25,7 @@ pub const CommandType = enum {
     Highpass,
     Delay,
     Vinyl,
+    RevDelay,
 };
 
 pub const Command = struct {
@@ -141,6 +142,7 @@ pub const Lang = struct {
         _ = try self.keywords.put("highpass", .Highpass);
         _ = try self.keywords.put("delay", .Delay);
         _ = try self.keywords.put("vinyl", .Vinyl);
+        _ = try self.keywords.put("revdelay", .RevDelay);
     }
 
     pub fn parse(self: *Lang, data: []const u8) !CommandList {

src/runner.zig

@@ -240,6 +240,11 @@ pub const Runner = struct {
         try image.runPlugin("http://plugin.org.uk/swh-plugins/vynil", pos, params);
     }
 
+    fn revDelayCmd(self: *Runner, pos: Position, params: ParamList) !void {
+        var image = try self.getImage();
+        try image.runPlugin("http://plugin.org.uk/swh-plugins/revdelay", pos, params);
+    }
+
     fn runCommand(self: *Runner, cmd: *lang.Command) !void {
         var params = ParamList.init(self.allocator);
         defer params.deinit();
@@ -367,6 +372,18 @@ pub const Runner = struct {
                 try self.vinylCmd(pos, params);
             },
 
+            .RevDelay => blk: {
+                const pos = try cmd.consumePosition();
+
+                try cmd.appendParam(&params, "delay_time");
+                try cmd.appendParam(&params, "dry_level");
+                try cmd.appendParam(&params, "wet_level");
+                try cmd.appendParam(&params, "feedback");
+                try cmd.appendParam(&params, "xfade_samp");
+
+                try self.revDelayCmd(pos, params);
+            },
+
             else => blk: {
                 std.debug.warn("Unsupported command: {}\n", cmd.command);
                 break :blk RunError.UnknownCommand;