;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2016 David Thompson <davet@gnu.org>
;;; Copyright © 2016, 2019 Marius Bakke <mbakke@fastmail.com>
;;; Copyright © 2017 Leo Famulari <leo@famulari.name>
;;; Copyright © 2018 Tobias Geerinckx-Rice <me@tobias.gr>
;;; Copyright © 2016 Kei Kebreau <kkebreau@posteo.net>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or (at
;;; your option) any later version.
;;;
;;; GNU Guix is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.

(define-module (gnu packages speech)
  #:use-module ((guix licenses) #:prefix license:)
  #:use-module (guix packages)
  #:use-module (guix download)
  #:use-module (guix utils)
  #:use-module (guix build-system gnu)
  #:use-module (gnu packages)
  #:use-module (gnu packages audio)
  #:use-module (gnu packages autotools)
  #:use-module (gnu packages compression)
  #:use-module (gnu packages gcc)
  #:use-module (gnu packages glib)
  #:use-module (gnu packages linux)
  #:use-module (gnu packages perl)
  #:use-module (gnu packages pkg-config)
  #:use-module (gnu packages pulseaudio)
  #:use-module (gnu packages python)
  #:use-module (gnu packages sdl)
  #:use-module (gnu packages textutils))

(define-public espeak
  (package
    (name "espeak")
    (version "1.48.04")
    (source (origin
              (method url-fetch)
              (uri (string-append "mirror://sourceforge/espeak/espeak/"
                                  "espeak-" (version-major+minor version)
                                  "/espeak-" version "-source.zip"))
              (sha256
               (base32
                "0n86gwh9pw0jqqpdz7mxggllfr8k0r7pc67ayy7w5z6z79kig6mz"))
              (modules '((guix build utils)))
              (snippet
               ;; remove prebuilt binaries
               '(begin
                  (delete-file-recursively "linux_32bit")
                  #t))))
    (build-system gnu-build-system)
    (arguments
     `(#:make-flags (list (string-append "PREFIX=" (assoc-ref %outputs "out"))
                          (string-append "DATADIR="
                                         (assoc-ref %outputs "out")
                                         "/share/espeak-data")
                          (string-append "LDFLAGS=-Wl,-rpath="
                                         (assoc-ref %outputs "out")
                                         "/lib")
                          "AUDIO=pulseaudio")
       #:tests? #f ; no check target
       #:phases
       (modify-phases %standard-phases
         (replace 'configure
           (lambda _
             (chdir "src")
             ;; We use version 19 of the PortAudio library, so we must copy the
             ;; corresponding file to be sure that espeak compiles correctly.
             (copy-file "portaudio19.h" "portaudio.h")
             (substitute* "Makefile"
               (("/bin/ln") "ln"))
             #t)))))
       (inputs
        `(("portaudio" ,portaudio)
          ("pulseaudio" ,pulseaudio)))
       (native-inputs `(("unzip" ,unzip)))
       (home-page "http://espeak.sourceforge.net/")
       (synopsis "Software speech synthesizer")
       (description "eSpeak is a software speech synthesizer for English and
other languages.  eSpeak uses a \"formant synthesis\" method.  This allows many
languages to be provided in a small size.  The speech is clear, and can be used
at high speeds, but is not as natural or smooth as larger synthesizers which are
based on human speech recordings.")
       (license license:gpl3+)))

(define-public espeak-ng
  (package
    (name "espeak-ng")
    (version "1.49.2")
    (home-page "https://github.com/espeak-ng/espeak-ng")
    (source (origin
              (method url-fetch)
              (uri (string-append home-page "/releases/download/" version
                                  "/espeak-ng-" version ".tar.gz"))
              (sha256
               (base32 "1d10x9rbvqi2zwcz65fxh04k0x0scnk7732l37laz6xra1ldhzng"))))
    (build-system gnu-build-system)
    (arguments
     `(#:configure-flags '("--disable-static")
       ;; Building in parallel triggers a race condition in 1.49.2.
       #:parallel-build? #f
       ;; XXX: Some tests require an audio device.
       #:tests? #f))
    (inputs
     `(("libcap" ,libcap)
       ("pcaudiolib" ,pcaudiolib)))
    (synopsis "Software speech synthesizer")
    (description
     "eSpeak NG is a software speech synthesizer for more than 100 languages.
It is based on the eSpeak engine and supports spectral and Klatt formant
synthesis, and the ability to use MBROLA voices.")
    (license license:gpl3+)))

(define-public julius
  (let ((commit "8c60cb8c99998bad8c04e6e50810596b80309eea"))
    (package
      (name "julius")
      (version (git-version "4.5" "1" commit))
      (source
       (origin
         (method git-fetch)
         (uri
          (git-reference
           (url "https://github.com/julius-speech/julius")
           (commit commit)))
         (file-name
          (git-file-name name version))
         (sha256
          (base32
           "11qbp9kid251lx6li4fv1r6l0pixxcs1m00sax1z057bhcv4jc7a"))))
      (build-system gnu-build-system)
      (arguments
       `(#:phases
         (modify-phases %standard-phases
           (delete 'check))))
      (inputs
       `(("alsa-lib" ,alsa-lib)
         ("zlib" ,zlib)
         ("sdl2" ,sdl2)
         ("perl" ,perl)))
      (home-page "https://github.com/julius-speech/julius")
      (synopsis "Large vocabulary continuous speech recognition
engine")
      (description
       "Julius is a high-performance, small-footprint large vocabulary
continuous speech recognition @acronym(LVCSR, large vocabulary
continous speech recognition) decoder software for speech-related
researchers and developers. Based on word N-gram and context-dependent
HMM, it can perform real-time decoding on various computers and
devices from micro-computer to cloud server.")
      (license
       (license:non-copyleft "http://julius.osdn.jp/LICENSE.txt"
                             "Julius-Modified-BSD-4Clause")))))

(define-public mitlm
  (package
    (name "mitlm")
    (version "0.4.2")
    (source (origin
              (method url-fetch)
              (uri (string-append "https://github.com/mitlm/mitlm/releases/"
                                  "download/v" version "/"
                                  name "-" version ".tar.xz"))
              (sha256
               (base32
                "09fv4fcpmw9g1j0zml0k5kk1lgjw2spr8gn51llbkaaph6v8d62a"))))
    (build-system gnu-build-system)
    (native-inputs
     `(("gfortran" ,gfortran)))
    (synopsis "The MIT Language Modeling toolkit")
    (description "The MIT Language Modeling (MITLM) toolkit is a set of
tools designed for the efficient estimation of statistical n-gram language
models involving iterative parameter estimation.  It achieves much of its
efficiency through the use of a compact vector representation of n-grams.")
    (home-page "https://github.com/mitlm/mitlm")
    (license license:expat)))

(define-public speech-dispatcher
  (package
    (name "speech-dispatcher")
    (version "0.9.0")
    (source (origin
              (method url-fetch)
              (uri (string-append "https://github.com/brailcom/speechd/releases"
                                  "/download/" version "/speech-dispatcher-"
                                  version ".tar.gz"))
              (sha256
               (base32
                "1yd2rb02565picga4gh2a0bvfxbhdyaj0cv9aaj5a8fc5zs29fbk"))))
    (build-system gnu-build-system)
    (arguments
     `(#:configure-flags '("--disable-static"
                           ;; Disable support for proprietary TTS engines.
                           "--with-kali=no" "--with-baratinoo=no")))
    (native-inputs
     `(("intltool" ,intltool)
       ("pkg-config" ,pkg-config)))
    (inputs
     `(("dotconf" ,dotconf)
       ("espeak" ,espeak-ng)
       ("glib" ,glib)
       ("libltdl" ,libltdl)
       ("libsndfile" ,libsndfile)
       ("pulseaudio" ,pulseaudio)
       ("python" ,python)))
    (synopsis "Common interface to speech synthesizers")
    (description "The Speech Dispatcher project provides a high-level
device independent layer for access to speech synthesis through a simple,
stable and well documented interface.")
    (home-page "https://devel.freebsoft.org/speechd")
    ;; The software is distributed under GPL2+, but includes a number
    ;; of files covered by other licenses.
    (license (list license:gpl2+
                   license:fdl1.2+ ; Most files in doc/ are dual gpl2+/fdl1.2+.
                   license:lgpl2.1+
                   license:gpl2
                   (license:non-copyleft
                    ;; festival_client.{c,h} carries an expat-style license.
                    "See src/modules/festival_client.c in the distribution.")
                   license:gpl3+)))) ; doc/texinfo.tex -- with TeX exception.

(define-public sonic
  (package
    (name "sonic")
    (version "0.2.0")
    (source (origin
             (method url-fetch)
             (uri (string-append "https://github.com/waywardgeek/sonic/archive/"
                                 "release-" version ".tar.gz"))
             (file-name (string-append name "-" version ".tar.gz"))
             (sha256
              (base32
               "11a0q9wkgbb9ymf52v7dvybfhj8hprgr67zs1xcng143fvjpr0n7"))))
    (build-system gnu-build-system)
    (arguments
      `(#:tests? #f ; No test suite.
        #:make-flags
         (list (string-append "DESTDIR=" (assoc-ref %outputs "out")))
        #:phases
        (modify-phases %standard-phases
          (delete 'configure)))) ; No ./configure script.
    (synopsis "Speed up or slow down speech")
    (description "Sonic implements a simple algorithm for speeding up or slowing
down speech.  However, it's optimized for speed ups of over 2X, unlike previous
algorithms for changing speech rate.  Sonic is a C library designed to be easily
integrated into streaming voice applications such as text-to-speech (TTS) back
ends.

The primary motivation behind Sonic is to enable the blind and visually impaired
to improve their productivity with speech engines, like eSpeak.  Sonic can also
be used by the sighted.")
    (home-page "https://github.com/waywardgeek/sonic")
    (license license:asl2.0)))