From 75eeea14f34ef7b309fca36b022933cd2ad12c45 Mon Sep 17 00:00:00 2001
From: Luna <git@l4.pm>
Date: Tue, 6 Aug 2019 19:25:31 -0300
Subject: [PATCH] add check for n_audio_out>2

---
 doc/README.md  | 8 ++++++--
 src/custom.zig | 4 ++++
 src/image.zig  | 7 +++++--
 3 files changed, 15 insertions(+), 4 deletions(-)

diff --git a/doc/README.md b/doc/README.md
index 3620102..8330e43 100644
--- a/doc/README.md
+++ b/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.
diff --git a/src/custom.zig b/src/custom.zig
index df9f331..2fc5a09 100644
--- a/src/custom.zig
+++ b/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,
 
diff --git a/src/image.zig b/src/image.zig
index 8686e12..5d4467a 100644
--- a/src/image.zig
+++ b/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.