add check for n_audio_out>2

doc/README.md

@@ -38,13 +38,17 @@ Run the eg-amp plugin over the given slice of the file.
 
 Run the Retro Flanger script from the SWH plugins.
 
- - `delay_depth_avg` is for the `Average stall (ms)` parameter of the plugin.
- - `law_freq` is for the `Flange frequency` parameter of the plugin.
+Parameters:
+ - `delay_depth_avg`: Average stall (ms), 0..10, default 2.5
+ - `law_freq`: Flange frequency (Hz), 0.5..8, default 1
 
 ## `eq split index lo mid hi`
 
 Run the DJ EQ plugin from the SWH plugins.
 
+Parameters:
+ - `lo`: Low range
+
 `lo`, `mid`, and `hi` are the respective dB gains for each frequency range.
 
 All three ranges accept gains from -70dB to +6dB.

src/custom.zig

@@ -95,6 +95,10 @@ pub const WildNoise = struct {
     }
 };
 
+/// Write any float to the image.
+/// Keep in mind that the bit representation of the float will clash with
+/// the format of BMP pixel data, which means writing 0 everywhere won't give
+/// you the black color.
 pub const Write = struct {
     data: f32,
 

src/image.zig

@@ -249,11 +249,14 @@ pub const Image = struct {
         var ports = try lv2.setupPorts(&ctx);
 
         if (ctx.n_audio_in > 2) {
-            std.debug.warn("plugin <{}> accepts more than two channels.\n", plugin_uri);
+            std.debug.warn("plugin <{}> has more than two inputs.\n", plugin_uri);
             return ImageError.InvalidPlugin;
         }
 
-        // TODO check n_audio_out > 2
+        if (ctx.n_audio_out > 2) {
+            std.debug.warn("plugin <{}> has more than two outputs.\n", plugin_uri);
+            return ImageError.InvalidPlugin;
+        }
 
         // now, for each param for the plugin, we find its port, and set
         // the value for the port there.