From 9bd8f004b216834ea02678dba11a94770f3b3e44 Mon Sep 17 00:00:00 2001
From: "Matthias P. Braendli" <matthias.braendli@mpb.li>
Date: Fri, 6 Jun 2014 18:09:06 +0200
Subject: Add encode-jack.sh

---
 encode-jack.sh | 154 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 154 insertions(+)
 create mode 100755 encode-jack.sh

(limited to 'encode-jack.sh')

diff --git a/encode-jack.sh b/encode-jack.sh
new file mode 100755
index 0000000..ab7e9aa
--- /dev/null
+++ b/encode-jack.sh
@@ -0,0 +1,154 @@
+#!/bin/bash
+#
+# mplayer - jack - jack-stdout - dabplus-enc
+# encoder script.
+#
+# Used to encode webstreams for DAB+, requires
+# jackd -d dummy -r 32000
+# to be running
+
+printerr() {
+    echo -e "\033[01;31m$1\033[0m"
+}
+
+printmsg() {
+    echo -e "\033[01;32m$1\033[0m"
+}
+
+set -u
+
+# check number of arguments
+if [[ "$#" < 3 ]] ; then
+    echo "Usage $0 url jack-id destination [volume]"
+    echo "The volume setting is optional"
+    exit 1
+fi
+
+if [[ "$#" > 2 ]] ; then
+    URL=$1
+    ID=$2
+    DST=$3
+fi
+
+if [[ "$#" == 4 ]] ; then
+    VOL=$4
+else
+    VOL=""
+fi
+
+BITRATE=80
+RATE=32000
+
+encoderalive=0
+mplayerpid=0
+encoderpid=0
+
+# The trap for Ctrl-C
+sigint_trap() {
+    printerr "Got Ctrl-C, killing mplayer and encoder"
+
+    if [[ "$mplayerpid" != "0" ]] ; then
+        kill -TERM $mplayerpid
+        sleep 2
+        kill -KILL $mplayerpid
+    fi
+
+    if [[ "$encoderpid" != "0" ]] ; then
+        kill -TERM $encoderpid
+        sleep 2
+        kill -KILL $encoderpid
+    fi
+
+    printmsg "Goodbye"
+    exit
+}
+
+trap sigint_trap SIGINT
+
+while true
+do
+    mplayer_ok=0
+
+    if [[ "$mplayerpid" == "0" ]] ; then
+        if [[ "$VOL" == "" ]] ; then
+            mplayer -quiet -af resample=$RATE:0:2 -ao jack:name=$ID $URL &
+            mplayerpid=$!
+        else
+            mplayer -quiet -af resample=$RATE:0:2 -af volume=$VOL -ao jack:name=$ID $URL &
+            mplayerpid=$!
+        fi
+
+        printmsg "Started mplayer with pid $mplayerpid"
+
+        # give some time to mplayer to set up and
+        # wait until port becomes visible
+        timeout=10
+
+        while [[ "$mplayer_ok" == "0" ]]
+        do
+            printmsg "Waiting for mplayer to connect to jack ($timeout)"
+            sleep 1
+            mplayer_ok=$(jack_lsp $ID:out_0 | wc -l)
+
+            timeout=$(( $timeout - 1))
+
+            if [[ "$timeout" == "0" ]] ; then
+                printerr "mplayer doesn't connect to jack !"
+                kill $mplayerpid
+                break
+            fi
+        done
+    else
+        printmsg "No need to start mplayer: $mplayerpid"
+    fi
+
+    if [[ "$mplayer_ok" == "1" ]] ; then
+        jack-stdout $ID:out_0 $ID:out_1 | \
+            dabplus-enc -i /dev/stdin -l \
+            -b $BITRATE -r $RATE -f raw -a -o $DST &
+        encoderpid=$!
+    fi
+
+    printmsg "Started encoder with pid $encoderpid"
+
+    sleep 5
+
+    checkloop=1
+    while [[ "$checkloop" == "1" ]]
+    do
+        sleep 2
+
+        kill -s 0 $mplayerpid
+        if [[ "$?" != "0" ]] ; then
+            # mplayer died
+            # we must kill jack-stdout, because we cannot reconnect it
+            # to a new mplayer, since we do not know the jack-stdout name.
+            # And it has no cmdline option to set one, Rrrrongntudtjuuu!
+            if [[ "$encoderpid" != "0" ]] ; then
+                kill -TERM $encoderpid
+            fi
+            checkloop=0
+
+            # mark as dead
+            mplayerpid=0
+
+            printerr "Mplayer died"
+        fi
+
+        if [[ "$encoderpid" != "0" ]] ; then
+            kill -s 0 $encoderpid
+            if [[ "$?" != "0" ]] ; then
+                # the encoder died,
+                # no need to kill the mplayer, we can reconnect to it
+
+                checkloop=0
+
+                printerr "Encoder died"
+            fi
+        fi
+    done
+
+    sleep 5
+
+done
+
-- 
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