add check for n_audio_out>2

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.