From c76312aea57509327f1242aaff4a3241154ede26 Mon Sep 17 00:00:00 2001
From: Michael Alan Dorman <mdorman@ironicdesign.com>
Date: Thu, 13 Sep 2018 20:03:31 -0400
Subject: [PATCH] airsonic: provide additional jvm configuration

This allows the user, among other things, to configure jukebox output
to go to non-default alsa devices.
---
 nixos/modules/services/misc/airsonic.nix | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/nixos/modules/services/misc/airsonic.nix b/nixos/modules/services/misc/airsonic.nix
index 083587b8ebb1..01d7b3cf6b9d 100644
--- a/nixos/modules/services/misc/airsonic.nix
+++ b/nixos/modules/services/misc/airsonic.nix
@@ -73,6 +73,24 @@ in {
           ${cfg.home}/transcoders.
         '';
       };
+
+      jvmOptions = mkOption {
+        description = ''
+          Extra command line options for the JVM running AirSonic.
+          Useful for sending jukebox output to non-default alsa
+          devices.
+        '';
+        default = [
+        ];
+        type = types.listOf types.str;
+        example = [
+          "-Djavax.sound.sampled.Clip='#CODEC [plughw:1,0]'"
+          "-Djavax.sound.sampled.Port='#Port CODEC [hw:1]'"
+          "-Djavax.sound.sampled.SourceDataLine='#CODEC [plughw:1,0]'"
+          "-Djavax.sound.sampled.TargetDataLine='#CODEC [plughw:1,0]'"
+        ];
+      };
+
     };
   };
 
@@ -98,6 +116,7 @@ in {
           -Dserver.port=${toString cfg.port} \
           -Dairsonic.contextPath=${cfg.contextPath} \
           -Djava.awt.headless=true \
+          ${toString cfg.jvmOptions} \
           -verbose:gc \
           -jar ${pkgs.airsonic}/webapps/airsonic.war
         '';