Initial commit

espeak

@@ -0,0 +1,133 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#!/usr/bin/env bash
+set -euo pipefail
+set -x
+
+# This wrapper is a drop-in replacement for espeak, which does the following:
+# 1. If the language is not Japanese, it calls espesk from the system directly.
+# 2. If the language is Japanese, it calls open_jtalk. Models and voice are
+#   provided in the japanese/ folder. They're licensed under BSD-3-Clause, so
+#   we can redistribute them with the game.
+# 3. If open_jtalk is not available, fall back to espeak.
+
+ROOT="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)"
+
+REAL_ESPEAK="$(command -v espeak-ng || true)"
+if [[ -z "${REAL_ESPEAK}" ]]; then
+  REAL_ESPEAK="$(command -v /usr/bin/espeak || command -v espeak)"
+fi
+
+if [[ -z "${REAL_ESPEAK}" ]]; then
+  echo "ERROR: could not find espeak or espeak-ng in PATH" >&2
+  exit 127
+fi
+
+OPENJTALK="$(command -v open_jtalk || true)"
+if [[ -z "${OPENJTALK}" ]]; then
+  echo "WARNING: could not find open_jtalk in PATH" >&2
+  echo "Falling back to espeak for all languages, including Japanese." >&2
+fi
+
+PLAYER="$(command -v paplay || command -v aplay || true)"
+if [[ -z "${PLAYER}" ]]; then
+  echo "WARNING: could not find paplay or aplay in PATH" >&2
+  echo "Falling back to espeak for all languages, including Japanese." >&2
+fi
+
+JTALK_DIC="${ROOT}/japanese/dict"
+JTALK_VOICE="${ROOT}/japanese/voice/nitech_jp_atr503_m001.htsvoice"
+
+voice=""
+declare -a passthrough=()
+text=""
+
+while (($#)); do
+  case "$1" in
+    -v)
+      shift
+      voice="${1:-}"
+      ;;
+    -v*)
+      voice="${1#-v}"
+      ;;
+    # keep other flags for espeak fallback (-a is used by Ren'Py)
+    -*)
+      passthrough+=("$1")
+      # capture arg for flags like -a <amp>
+      if [[ "$1" == "-a" && $# -ge 2 ]]; then
+        shift
+        passthrough+=("$1")
+      fi
+      ;;
+    *)
+      # Ren'Py appends the full text as one argument.
+      # If something else adds extra args, last one wins.
+      text="$1"
+      ;;
+  esac
+  shift || true
+done
+
+
+fallback() {
+  echo "ERROR: OpenJTalk failed; falling back to espeak" >&2
+}
+
+voice_openjtalk() {
+  [[ -n "${OPENJTALK}" && -x "${OPENJTALK}" ]] || return 2
+  [[ -d "${JTALK_DIC}" ]] || return 3
+  [[ -f "${JTALK_VOICE}" ]] || return 4
+  [[ -n "${text}" ]] || return 5
+
+  local tmpwav
+  tmpwav="$(mktemp --suffix=.wav)"
+
+  set +e
+  printf "%s" "${text}" | "${OPENJTALK}" \
+    -x "${JTALK_DIC}" \
+    -m "${JTALK_VOICE}" \
+    -ow "${tmpwav}" \
+    >/dev/null 2>&1
+  local rc=$?
+  set -e
+
+  # If a generated wav file is empty, fallback.
+  if [[ $rc -ne 0 || ! -s "${tmpwav}" ]]; then
+    rm -f "${tmpwav}"
+    return 10
+  fi
+
+  # If there is no player, fallback to espeak.
+  if [[ -z "${PLAYER}" ]]; then
+    rm -f "${tmpwav}"
+    return 11
+  fi
+
+  set +e
+  "${PLAYER}" "${tmpwav}" >/dev/null 2>&1
+  local prc=$?
+  set -e
+
+  rm -f "${tmpwav}"
+  [[ $prc -eq 0 ]] || return 12
+
+  return 0
+}
+
+if [[ "${voice}" == "ja" ]]; then
+  if voice_openjtalk; then
+    exit 0
+  else
+    fallback
+  fi
+fi
+
+# Fallback to espeak.
+if [[ -n "${voice}" ]]; then
+  exec "${REAL_ESPEAK}" -v "${voice}" "${passthrough[@]}" "${text}"
+else
+  exec "${REAL_ESPEAK}" "${passthrough[@]}" "${text}"
+fi