test: play sine on output device

tests/device/alsa_device_aura_engine.liq

+#!/usr/bin/env liquidsoap
+#
+# Aura Engine (https://gitlab.servus.at/aura/engine)
+#
+# Copyright (C) 2017-now() - The Aura Engine Team.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program 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 Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+set("init.allow_root", true)
+set("init.catch_exn", false)
+set("init.trace", true)
+set("log.file.path", "../../logs/<script>.log")
+set("log.level", 5)
+set("ffmpeg.log.level", 5)
+
+
+set("frame.audio.size", 7526)
+set("frame.video.framerate", 0)
+output_device = getenv(default="pcm.aura_engine", "AURA_ENGINE_OUTPUT_DEVICE")
+output.alsa(id="lineout", device=output_device, sine(), bufferize=false, fallible=true)