126 lines
2.9 KiB
Bash
Executable File
126 lines
2.9 KiB
Bash
Executable File
#!/bin/sh
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_printhelp ()
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{
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cat<<EOF
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Usage: ${1##*/} [-p PROC] ROOT [OPTIONS]
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This will batch-process all audio files found in ROOT folder and subfolders with
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the tc-audio-transcode script.
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All OPTIONS are passed to tc-audio-transcode. For more details see
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tc-audio-transcode -h
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This script has the ability to run multiple processes. The number of processes
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defaults to the number of online cores if 'lscpu' is found, or to 1
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otherwise. The number of parallel processes is bounded by the number of input
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files. Outputting from several processes at the same time to the standard output
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is not convenient, therefore when more than 1 process are started, the output is
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disabled (except for errors).
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If you still want the output, you need to restrict the number of processes to
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1. For instance to preview changes in current folder you would write:
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${1##*/} -p1 . -p
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Options:
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-p PROC: run PROC processes in parallel.
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EOF
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}
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if command -v lscpu >/dev/null; then
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## lscpu is a Linux util also available on *BSD.
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CPUNO=$(lscpu | awk '/^CPU\(s\)/ {print $2;exit}')
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else
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CPUNO=1
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fi
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while getopts ":p:h" opt; do
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case $opt in
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h)
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_printhelp "$0"
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exit 1 ;;
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p)
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CPUNO=$OPTARG ;;
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?)
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_printhelp "$0"
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exit 1 ;;
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:)
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_printhelp "$0"
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exit 1 ;;
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esac
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done
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shift $(($OPTIND - 1))
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if [ $# -eq 0 ]; then
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_printhelp "$0"
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exit 1
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fi
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ROOT="$1"
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shift
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if ! command -v ffmpeg >/dev/null; then
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echo "ffmpeg required."
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exit
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fi
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if [ ! -f "${0%/*}/titlecase.awk" ]; then
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echo "AWK titlecase script required."
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exit
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fi
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if [ ! -f "${0%/*}/tc-audio-transcode" ]; then
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echo "tc-audio-transcode script required."
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exit
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fi
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INPUT="$(find "." \( \
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-iname '*.aac' -o \
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-iname '*.ape' -o \
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-iname '*.flac' -o \
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-iname '*.ogg' -o \
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-iname '*.mp3' -o \
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-iname '*.mp4' -o \
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-iname '*.mpc' -o \
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-iname '*.wav' -o \
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-iname '*.wv' \) | sort -n)"
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_worker()
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{
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CORE=$1
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shift
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## WARNING: ffmpeg continues to read stdin once it has started, so it should
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## not be called from within a while<<EOF loop without redirecting stdin.
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while IFS= read -r file; do
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if [ -n "$file" ]; then
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echo "$(tput setf 2)$(tput bold)==>$(tput sgr0) $file"
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[ $CPUNO -eq 1 ] && "${0%/*}"/tc-audio-transcode "$@" "$file" || \
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tc-audio-transcode -q "$@" "$file" >/dev/null
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fi
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done<<EOF
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$(echo "$INPUT" | sed -n "$CORE~${CPUNO}p")
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EOF
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echo "$(tput setf 5)$(tput bold)::$(tput sgr0) Thread $CORE/$CPUNO terminated."
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}
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FILENO=$(echo "$INPUT" | wc -l)
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if [ $CPUNO -gt $FILENO ]; then
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CPUNO=$FILENO
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fi
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for i in $(seq 2 $CPUNO); do
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_worker $i "$@" &
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done
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## We run one worker in the current process so that this script will hopefully
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## terminate when the last job finishes.
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_worker 1 "$@"
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