Commit ca4060f9 authored by moritz's avatar moritz

Add a more fancy playlist script.


git-svn-id: https://svn.xiph.org/trunk/ezstream@16523 0101bb08-14d6-0310-b084-bc0e0c8e3800
parent cae7e002
......@@ -5,6 +5,8 @@ Changes in 0.5.6, released on XXXX-XX-XX:
Failure to open a resource (e.g. a media file) is no longer fatal
and operation will continue as far as possible. Idea from dhorton.
(Ticket #1585)
* examples/:
- [NEW] Add a real-world example playlist script with logging feature.
Changes in 0.5.5, released on 2009-08-01:
......
......@@ -6,6 +6,6 @@ dist_examples_DATA = \
ezstream_reencode_theora.xml ezstream_reencode_vorbis.xml \
ezstream_stdin_vorbis.xml ezstream_vorbis.xml \
ezstream_metadata.xml
dist_examples_SCRIPTS = meta.sh play.sh
dist_examples_SCRIPTS = meta.sh play.sh playlist-logger.sh
CLEANFILES = core *.core *~ .*~
#!/bin/sh
# Example metadata script that has the behavior required by ezstream.
# Minimalist example metadata script that has the behavior required by
# ezstream.
test -z "${1}" && echo "Ezstream presents"
test x"${1}" = "xartist" && echo "Great Artist"
......
#!/bin/sh
# Example playlist script that has the behavior required by ezstream.
# Minimalist example playlist script that has the behavior required by
# ezstream.
echo "Great_Artist_-_Great_Song.ogg"
#!/bin/sh
# Example playlist script, by Moritz Grimm
# Public Domain where available. Anywhere else: all possible permissions
# are granted and all warranties whatsoever are disclaimed. Use at your
# own risk.
#
# The script plays a simple playlist, but also logs when and which new
# song is queued. Because it writes the entire playlist each time it is
# run, the script will probably not perform well with huge (500+kB)
# playlist files.
#
# Before using it, the configuration variables below should be adjusted
# appropriately.
#
# When using this script in multiple instances of ezstream, use
# different STATE_DIR locations or rename the script to a unique name.
#########################
## BEGIN CONFIGURATION #######################################################
#########################
# STATE_DIR
# Directory where this script keeps state. The directory should only be
# writeable by the user and nobody else (therefore, /tmp is not
# suitable.)
STATE_DIR="."
# PLAYLIST
# The playlist that should be played by this script.
PLAYLIST="playlist.txt"
# LOGFILE (optional)
# File to log song changes to. If not set, logging to file is disabled
# (and this script can be replaced by $PLAYLIST.)
LOGFILE="ezstream.log"
# REPEAT (optional)
# Set to 1 to repeat the playlist indefinitely, set to 0 or leave commented
# out to allow ezstream to determine what to do at end-of-playlist.
#REPEAT=1
#######################
## END CONFIGURATION #########################################################
#######################
_myname="$(basename $0)"
# Check configuration above:
if [ -z "${STATE_DIR}" -o ! -d "${STATE_DIR}" ]; then
echo "${_myname}: STATE_DIR is not configured, does not exist or is not a directory." >&2
exit 1
fi
if [ -z "${PLAYLIST}" -o ! -e "${PLAYLIST}" ]; then
echo "${_myname}: PLAYLIST is not configured or does not exist." >&2
exit 1
fi
test -n "${REPEAT}" || REPEAT=0
# Set up helper files:
_state="${STATE_DIR}/${_myname}.state"
_playlist="`mktemp "${STATE_DIR}/${_myname}.XXXXXXXXXX"`"
if [ $? -ne 0 ]; then
echo "${_myname}: Unable to create temporary file." >&2
exit 1
fi
trap 'rm -f ${_playlist}' 0
trap 'rm -f ${_playlist}; exit 1' 2 15
# Strip comments and empty lines from PLAYLIST, to support .m3u:
sed -e 's,#.*,,g' < ${PLAYLIST} | grep -v '^[[:space:]]*$' >> ${_playlist}
if [ $? -ne 0 ]; then
echo "${_myname}: Unable to prepare playlist." >&2
exit 1
fi
# Create state file, if it does not exist:
test -f "${_state}" || touch "${_state}"
if [ $? -ne 0 ]; then
echo "${_myname}: Unable to create state file." >&2
exit 1
fi
# Read current track no. from state file:
read _track_no < "${_state}"
if [ -z "${_track_no}" ]; then
_track_no=1
fi
# Count number of tracks in the playlist:
_num_tracks="$(wc -l < ${_playlist})"
if [ ${_num_tracks} -eq 0 ]; then
# Nothing to do, really.
exit 0
fi
# Handle the end-of-playlist case:
if [ ${_track_no} -gt ${_num_tracks} ]; then
if [ ${REPEAT} -ne 1 ]; then
# We're done.
rm -f "${_state}"
exit 0
fi
_track_no=1
fi
# Get the current track from the playlist:
_track="$(head -n ${_track_no} ${_playlist} | tail -n 1)"
# Output:
echo "${_track}"
test -z "${LOGFILE}" || \
echo "$(date '+%b %d %H:%M:%S') playlist=\"${PLAYLIST}\" no=${_track_no} track=\"${_track}\"" \
>> "${LOGFILE}"
# Increment track number and store:
: $((_track_no += 1))
echo "${_track_no}" > "${_state}"
exit 0
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