allow for stereo input (unused, though)

doc/README.md

@@ -104,7 +104,7 @@ Parameters:
  - `gain`: Gain, 0..12, default 0
  - `noClip`: Soft Clip (assumed boolean), 0..1, default 0
 
-## `delay seed gain`
+## `delay seed gain feedback_pc tap_count first_delay delay_range delay_scale delay_rand_pc gain_scale wet`
 
 Parameters:
  - `seed`: Random seed, 0..1000, default 0
@@ -118,10 +118,25 @@ Parameters:
  - `gain_scale`: Amplitude change, 0.2..5, default 1
  - `wet`: Dry/wet mix, 0..1, default 1
 
+## TODO `vynil split index year warp click wear`
+
+VyNil effect from SWH.
+
+Parameters:
+ - `year`: Year (int), 1900..1990, default 1990
+ - `rpm`: RPM (int), 33..78, default 33
+ - `warp`: Surface Warping, 0..1, default 0
+ - `click`: Crackle, 0..1, default 0
+ - `wear`: Wear, 0..1, default 0
+
 ## TODO `echo split index delay`
 
 Run an echo filter on the given loaded file.
 
+## TODO `noise split index seed`
+
+Inject white noise on the image.
+
 ## `quicksave`
 
 Save the file on the same directory of the file specified by `load`, but

src/plugin.zig

@@ -72,8 +72,14 @@ pub const RunContext = struct {
             return ImageError.InstantiateFail;
         }
 
+        // we allocate []f32 with size 2 to account for stereo plugins, however
+        // we only use &in_buf[0] and &out_buf[0], and don't use the
+        // (supposedly) right side of neither input or output.
+        var in_buf = try allocator.alloc(f32, 2);
+        std.mem.secureZero(f32, in_buf);
+
         return RunContext{
-            .in_buf = try allocator.alloc(f32, 1),
+            .in_buf = in_buf,
             .out_buf = try allocator.alloc(f32, 2),
             .instance = instance.?,
         };