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78 lines
2.3 KiB
78 lines
2.3 KiB
6 years ago
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#!/bin/bash
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#
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# Copyright (C) 2019, Maxim Lihachev, <envrm@yandex.ru>
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#
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# This program is free software: you can redistribute it and/or modify it
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# under the terms of the GNU General Public License as published by the Free
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# Software Foundation, version 3.
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#
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# This program is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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# more details.
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#
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# You should have received a copy of the GNU General Public License along with
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# this program. If not, see <https://www.gnu.org/licenses/>.
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#
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#
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# Получение информации и аудиопотока в сети Axia Livewire
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#
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# Пример обработки полученных данных при помощи ffmpeg:
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#
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# | ffmpeg -ac 2 -ar 48000 -f s24be -i pipe:0
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#
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# Сценарий принимает адрес Axia Livewire в формате IP/Channel,
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# при этом IP-адрес может отсутствовать
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if [ $# -ne 2 ]; then
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echo "USAGE: $0 [--info|--dump] <IP/Channel>"
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exit 1
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fi
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# Перевод чисел в 16-ричную систему счисления
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hex() {
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printf '%02X' "$@"
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}
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# Программа
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PROGRAMME="$2"
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# IP-адрес Axia Livewire.
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IP="$(echo $PROGRAMME | grep -o '.*\/' | tr '/' ' ')"
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# По умолчанию используется базовый адрес 239.192.0.0
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ADDRESS="${IP:-239.192.0.0}"
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# Канал
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CHANNEL="${PROGRAMME/*\/}"
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# Команда получения сигнала в сети Axia Livewire
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CMD="rtpdump -F payload"
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BROADCAST="0x$(hex $[0x$(hex ${ADDRESS//./ })+$CHANNEL])/5004"
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HEXADDR="$(hex $[0x$(hex ${ADDRESS//./ })+$CHANNEL])"
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IPADDR=$(printf "%d." $(
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echo $HEXADDR | sed 's/../0x& /g' | tr ' ' '\n'
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) | sed 's/\.$/\n/')
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#################
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if [ "$1" == "--info" ]; then
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# Информация об источнике
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echo "Axia Livewire :: IP: $IPADDR, SOURCE: $CHANNEL, BROADCAST: $BROADCAST"
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else
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# Прекращение работы, если нет последующего конвеера,
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# т.к. выводить дамп аудиопотока в stdout не имеет смысла.
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if [ -t 1 ]; then
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echo "A pipe (f.e. to ffmpeg) isn't exists. Terminated."
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exit 1
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else
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# Дамп
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$CMD $BROADCAST
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fi
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fi
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