/home/bearcat/bin/wvbatch

homebearcatbinwvbatch

#! /bin/sh -
#
#   WVBATCH - wavpack batch encode script
#


## CONSTANTS ##
readonly TRUE=0
export TRUE
readonly FALSE=1
export FALSE


## VARIABLES ##
export WAVPACK_OPTS="-vyhhx3m"  
export DELETE_INPUT=$FALSE
MAX_PROCS="100%"


### FUNCTIONS ##################################################################

print_help()
{
    cat << EOF

 WVBATCH - wavpack batch encode script

 Usage:
    wvbatch [options] <input.files>

 Options:
    -d)
        delete all input files
        (same as '-o "[other-options] -d"')
    --help)
        print this message
    -j)
        maximum number of processors to use ||
        percentage of the available processors to use
        (default = '100%')
            e.g.)
            -j 6
            -j 40%
    -o)
        wavpack options
        (default = '-hhx6'; '-qzymvr' is hardcoded)
            e.g.)
            -o -hx3b320c
            -o "-hhx4 --raw-pcm=48000,16,6 --channel-order=FL,FR,FC,LFE,SL,SR"
        Read the wavpack man page for all available options.

 Dependencies:
    1   WavPack
    2   GNU Parallel

EOF
}


### TRAPS ######################################################################

trap '
    printf "\naborting...\n" >&2
    exit 255
' HUP INT QUIT ABRT KILL PIPE TERM


### GET OPTS ###################################################################

while [ $# -gt 0 ] ; do

    case $1 in
        -d)
            DELETE_INPUT=$TRUE
            shift
            ;;
        --help)
            print_help >&2
            exit 1
            ;;
        -j)
            MAX_PROCS="$2"
            shift 2
            ;;
        -o)
            WAVPACK_OPTS="$2"
            shift 2
            ;;
        --)
            shift
            break
            ;;
        *)
            break
            ;;
    esac

done

if [ $# -eq 0 ] ; then
    print_help >&2
    exit 1
fi

if [ $DELETE_INPUT -eq $TRUE ] ; then
    WAVPACK_OPTS="$WAVPACK_OPTS -d"
fi


### MAIN #######################################################################

wavpack 2>&1 | sed 4q >&2

parallel -j "$MAX_PROCS" '

    TIME_START=$(date +%s.%N)

    wavpack -qzymvr $WAVPACK_OPTS {}
    EXIT_STATUS=$?

    TIME_STOP=$(date +%s.%N)

    case $EXIT_STATUS in
        0)
            TIME=$(echo "$TIME_STOP - $TIME_START" | bc)

            OUTFILE={.}.wv

            WVINFO="$(wvunpack -qzs "$OUTFILE")"

            MD5_SIG="$(
                echo "$WVINFO" |
                grep -F "original md5:" |
                sed "s/original md5:[[:space:]]*//"
            )"

            MODALITY=$(echo "$WVINFO" | grep -F "modalities:")
            if echo "$MODALITY" | grep -Fq "lossless" ; then
                if echo "$MODALITY" | grep -Fq "hybrid" ; then
                    HYBRID="(+.wvc) "
                fi
                COMP_TYPE="lossless"
                COMP_STAT="$(
                    echo "$WVINFO" |
                    grep -F "compression:" |
                    sed "s/compression:[[:space:]]*//"
                )"
            else
                COMP_TYPE="lossy"
                COMP_STAT="$(
                    echo "$WVINFO" |
                    grep -F "ave bitrate:" |
                    sed "s/ave bitrate:[[:space:]]*//"
                )"
            fi

            printf "%s:\n" {}
            if [ $DELETE_INPUT -eq $TRUE ] ; then
                printf "deleted source file %s\n" {}
            fi
            printf "original md5 signature: %s\n" "$MD5_SIG"
            printf "created (and verified) %s %sin %.2f secs (%s, %s)\n" \
              "$OUTFILE" "$HYBRID" $TIME "$COMP_TYPE" "$COMP_STAT"
            printf "\n"
            exit 0
            ;;
        *)
            # wavpack will print the error here
            printf " \033[41m>>>\033[0m %s\n\n" {} >&2

            exit $EXIT_STATUS
            ;;
    esac

' ::: "$@"

EXIT_STATUS=$?

case $EXIT_STATUS in
    0)
        if [ $# -ne 1 ] ; then
            printf " **** %d files successfully processed ****\n" $# >&2
        fi
        exit 0
        ;;
    254)
        printf " **** warning: errors occured in more than 253 of %d files! ****\n" $# >&2
        exit 254
        ;;
    255) # parallel error
        exit 255
        ;;
    *)
        printf " **** warning: errors occured in %d of %d files! ****\n" $EXIT_STATUS $# >&2
        exit $EXIT_STATUS
        ;;
esac