>From 38e1053bf387e3d98e58a2972769fe7b826c3eff Mon Sep 17 00:00:00 2001
From: Pierre Neidhardt <mail@ambrevar.xyz>
Date: Tue, 28 Jul 2020 16:44:31 +0200
Subject: [PATCH 2/2] gnu: Add noisetorch.

* gnu/packages/pulseaudio.scm (noisetorch): New variable.
---
 gnu/packages/pulseaudio.scm | 53 +++++++++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)

diff --git a/gnu/packages/pulseaudio.scm b/gnu/packages/pulseaudio.scm
index e411cfa46c..abc457e96b 100644
--- a/gnu/packages/pulseaudio.scm
+++ b/gnu/packages/pulseaudio.scm
@@ -37,6 +37,7 @@
   #:use-module (guix build-system cmake)
   #:use-module (guix build-system glib-or-gtk)
   #:use-module (guix build-system gnu)
+  #:use-module (guix build-system go)
   #:use-module (guix build-system python)
   #:use-module (gnu packages)
   #:use-module (gnu packages algebra)
@@ -503,3 +504,55 @@ however they are only reduced in volume when voice is present.
 The plugin is made to work with 1 or 2 channels (ladspa plugin),
 16 bit, 48000 Hz audio input.")
     (license l:gpl3)))
+
+(define-public noisetorch
+  (package
+    (name "noisetorch")
+    (version "0.5.3-beta")
+    (source
+     (origin
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://github.com/lawl/NoiseTorch")
+             (commit version)))
+       (file-name (git-file-name name version))
+       (sha256
+        (base32 "1qs3laxggdwg5f3lxm1g29s9s2qn7yvlhlydqcava28a879vnxa5"))))
+    (build-system go-build-system)
+    (arguments
+     `(#:import-path "github.com/lawl/NoiseTorch"
+       #:install-source? #f
+       #:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'symlink-rnnoise
+           (lambda* (#:key inputs #:allow-other-keys)
+             (with-directory-excursion "src/github.com/lawl/NoiseTorch"
+               (let ((dir "librnnoise_ladspa/bin/ladspa")
+                     (rnnoise (assoc-ref inputs "rnnoise")))
+                 (mkdir-p dir)
+                 (symlink (string-append rnnoise "/lib/ladspa/librnnoise_ladspa.so")
+                          (string-append dir "/librnnoise_ladspa.so"))))
+             #t))
+         (add-after 'unpack 'gen-version.go
+           (lambda _
+             (with-directory-excursion "src/github.com/lawl/NoiseTorch"
+               (substitute* "main.go"
+                 (("//go:generate go run scripts/embedversion\\.go") ""))
+               (with-output-to-file "version.go"
+                 (lambda ()
+                   (format #t "package main~%~%var version=~s~&" ,version))))
+             #t))
+         (add-before 'build 'go-generate
+           (lambda _
+             (with-directory-excursion "src/github.com/lawl/NoiseTorch"
+               (invoke "go" "generate")))))))
+    (inputs
+     `(("rnnoise" ,rnnoise)))
+    (home-page "https://github.com/lawl/NoiseTorch")
+    (synopsis "Real-time microphone noise suppression")
+    (description "NoiseTorch creates a virtual PulseAudio microphone that
+suppresses noise, in any application.  Use whichever conferencing or VOIP
+application you like and simply select the NoiseTorch Virtual Microphone as
+input to torch the sound of your mechanical keyboard, computer fans, trains
+and the likes.")
+    (license l:gpl3)))
-- 
2.26.2