From 9a318958f2bf514530aeccd10c63058ac68b9dba Mon Sep 17 00:00:00 2001
From: Maxim Likhachev <envrm@yandex.ru>
Date: Sat, 19 Oct 2019 06:40:43 +0500
Subject: [PATCH] ++axaudio

---
 axaudio | 77 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 77 insertions(+)
 create mode 100755 axaudio

diff --git a/axaudio b/axaudio
new file mode 100755
index 0000000..4c21438
--- /dev/null
+++ b/axaudio
@@ -0,0 +1,77 @@
+#!/bin/bash
+
+#
+# Copyright (C) 2019, Maxim Lihachev, <envrm@yandex.ru>
+#
+# This program 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, version 3.
+#
+# 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 General Public License for
+# more details.
+#
+# You should have received a copy of the GNU General Public License along with
+# this program. If not, see <https://www.gnu.org/licenses/>.
+#
+
+#
+# Получение информации и аудиопотока в сети Axia Livewire
+#
+# Пример обработки полученных данных при помощи ffmpeg:
+#
+#  | ffmpeg -ac 2 -ar 48000 -f s24be -i pipe:0
+#
+
+# Сценарий принимает адрес Axia Livewire в формате IP/Channel,
+# при этом IP-адрес может отсутствовать
+if [ $# -ne 2 ]; then
+	echo "USAGE: $0 [--info|--dump] <IP/Channel>"
+	exit 1
+fi
+
+# Перевод чисел в 16-ричную систему счисления
+hex() {
+	printf '%02X' "$@"
+}
+
+# Программа
+PROGRAMME="$2"
+
+# IP-адрес Axia Livewire.
+IP="$(echo $PROGRAMME | grep -o '.*\/' | tr '/' ' ')"
+
+# По умолчанию используется базовый адрес 239.192.0.0
+ADDRESS="${IP:-239.192.0.0}"
+
+# Канал
+CHANNEL="${PROGRAMME/*\/}"
+
+# Команда получения сигнала в сети Axia Livewire
+CMD="rtpdump -F payload"
+
+BROADCAST="0x$(hex $[0x$(hex ${ADDRESS//./ })+$CHANNEL])/5004"
+HEXADDR="$(hex $[0x$(hex ${ADDRESS//./ })+$CHANNEL])"
+
+IPADDR=$(printf "%d." $(
+	echo $HEXADDR | sed 's/../0x& /g' | tr ' ' '\n'
+) | sed 's/\.$/\n/')
+
+#################
+
+if [ "$1" == "--info" ]; then
+	# Информация об источнике
+	echo "Axia Livewire :: IP: $IPADDR, SOURCE: $CHANNEL, BROADCAST: $BROADCAST"
+else
+	# Прекращение работы, если нет последующего конвеера,
+	# т.к. выводить дамп аудиопотока в stdout не имеет смысла.
+	if [ -t 1 ]; then
+		echo "A pipe (f.e. to ffmpeg) isn't exists. Terminated."
+		exit 1
+	else
+		# Дамп
+		$CMD $BROADCAST
+	fi
+fi
+