Add scripts and example site

1 files changed, 274 insertions, 0 deletions

diff --git a/encode-jack.sh b/encode-jack.sh
new file mode 100755
index 0000000..7a73589
--- /dev/null
+++ b/encode-jack.sh
@@ -0,0 +1,274 @@
+#!/bin/bash
+#
+# Encode programme using mplayer, connect through JACK
+# to dabplus-enc
+#
+# Read webstream from URL using mplayer
+# Launch dabplus-enc encoder
+# connect both through JACK
+# monitor processes, and restart if necessary
+# Optionally send an email when restart happens
+#
+# Extract ICY Text from stream and use it for DLS
+
+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=$4
+else
+    VOL=""
+fi
+
+BITRATE=80
+RATE=32000
+
+DLSDIR=site/dls
+SLIDEDIR=site/slide
+
+encoderalive=0
+mplayerpid=0
+encoderpid=0
+motencoderpid=0
+running=1
+
+mplayer_ok=0
+encoder_ok=0
+
+# The trap for Ctrl-C
+sigint_trap() {
+    printerr "Got Ctrl-C, killing mplayer and encoder"
+    running=0
+
+    if [[ "$mplayerpid" != "0" ]] ; then
+        kill -TERM $mplayerpid
+        sleep 2
+        kill -KILL $mplayerpid
+    fi
+
+    if [[ "$encoderpid" != "0" ]] ; then
+        kill -TERM $encoderpid
+        sleep 2
+        kill -KILL $encoderpid
+    fi
+
+    if [[ "$motencoderpid" != "0" ]] ; then
+        kill -TERM $motencoderpid
+        sleep 2
+        kill -KILL $motencoderpid
+    fi
+
+    printmsg "Goodbye"
+    exit
+}
+
+trap sigint_trap SIGTERM
+trap sigint_trap SIGINT
+
+while [[ "$running" == "1" ]]
+do
+    if [[ "$mplayerpid" == "0" ]] ; then
+        if [[ "$VOL" == "" ]] ; then
+            mplayer -quiet -af resample=$RATE:0:2 -ao jack:name=$ID $URL | \
+                ./icy-info.py $DLSDIR/${ID}.dls $DLSDIR/${ID}-default.dls &
+            mplayerpid=$!
+        else
+            mplayer -quiet -af resample=$RATE:0:2 -af volume=$VOL -ao jack:name=$ID $URL | \
+                ./icy-info.py $DLSDIR/${ID}.dls $DLSDIR/${ID}-default.dls &
+            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" && "$encoder_ok" == "0" ]] ; then
+        dabplus-enc -j ${ID}enc -l \
+            -p 34 -P $DLSDIR/${ID}.pad \
+            -b $BITRATE -r $RATE -f raw -a -o $DST &
+        encoderpid=$!
+
+        # give some time to the encoder to set up and
+        # wait until port becomes visible
+        timeout=10
+
+        encoder_connected=0
+
+        while [[ "$encoder_connected" == "0" ]]
+        do
+            printmsg "Waiting for encoder to connect to jack ($timeout)"
+            sleep 1
+            encoder_connected=$(jack_lsp ${ID}enc:input0 | wc -l)
+
+            timeout=$(( $timeout - 1))
+
+            if [[ "$timeout" == "0" ]] ; then
+                printerr "encoder doesn't connect to jack !"
+                kill $encoderpid
+                break
+            fi
+        done
+
+        if [[ "$encoder_connected" == "1" ]] ; then
+            jack_connect ${ID}:out_0 ${ID}enc:input0 && \
+            jack_connect ${ID}:out_1 ${ID}enc:input1
+            connect_ret=$?
+
+            if [[ "$connect_ret" == "0" ]] ; then
+                encoder_ok=1
+            else
+                encoder_ok=0
+            fi
+
+            if [[ "$encoder_ok" == "1" ]] ; then
+                printmsg "Started encoder with pid $encoderpid"
+            else
+                if [[ "$encoderpid" != "0" ]] ; then
+                    kill -TERM $encoderpid
+                fi
+            fi
+        fi
+    fi
+
+    if [[ "$encoder_ok" == "1" && "$motencoderpid" == "0" ]] ; then
+        # Check if the slides folder exists, and start mot-encoder accordingly
+        if [[ -d "$SLIDEDIR/$ID" ]] ; then
+            mot-encoder -o $DLSDIR/${ID}.pad -t $DLSDIR/${ID}.dls -p 34 -v \
+                -e -d $SLIDEDIR/${ID} &
+            motencoderpid=$!
+        else
+            mot-encoder -o $DLSDIR/${ID}.pad -t $DLSDIR/${ID}.dls -p 34 -v &
+            motencoderpid=$!
+        fi
+
+        printmsg "Started mot-encoder with pid $encoderpid"
+    fi
+
+
+    sleep 5
+
+    checkloop=1
+    while [[ "$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 $encoderpid
+            fi
+
+            if [[ "$motencoderpid" != "0" ]] ; then
+                kill -TERM $motencoderpid
+            fi
+
+            # mark as dead
+            mplayerpid=0
+            mplayer_ok=0
+            encoderpid=0
+            encoder_ok=0
+            motencoderpid=0
+
+            checkloop=0
+
+            printerr "Mplayer died"
+        fi
+
+        if [[ "$encoderpid" != "0" ]] ; then
+            kill -s 0 $encoderpid
+            if [[ "$?" != "0" ]] ; then
+                # the encoder died,
+                # no need to kill the mplayer, we can reconnect to it
+
+                if [[ "$motencoderpid" != "0" ]] ; then
+                    kill -TERM $motencoderpid
+                fi
+
+                motencoderpid=0
+                encoderpid=0
+                encoder_ok=0
+
+                checkloop=0
+
+                printerr "Encoder died"
+            fi
+        fi
+
+        if [[ "$motencoderpid" != "0" ]] ; then
+            kill -s 0 $motencoderpid
+            if [[ "$?" != "0" ]] ; then
+                # mot-encoder died
+                # let's try restarting it
+
+                motencoderpid=0
+
+                checkloop=0
+
+                printerr "mot-encoder died"
+            fi
+        fi
+    done
+
+    MAILTO=$(cat site/mail-warning.txt)
+
+    if [[ "$MAILTO" != "" ]] ; then
+        NOW=$(date)
+
+        mail -s "Encoder $ID restart $URL" $MAILTO << EOF
+The encoder id:$ID
+encoding $URL -> $DST using mplayer and jack was restarted at
+$NOW
+
+mplayer ok? $mplayer_ok
+
+EOF
+
+    fi
+    sleep 5
+
+done
+