mirror of
https://git.sr.ht/~magic_rb/dotfiles
synced 2024-11-26 10:06:13 +01:00
90 lines
2.3 KiB
Bash
90 lines
2.3 KiB
Bash
# -*- mode: sh -*-
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#! /usr/bin/env nix-shell
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#! nix-shell -i bash -p unixtools.xxd
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usage(){
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fmt <<EOF
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DESCRIPTION
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Adapted from ogg-cover-art by acabal: https://github.com/acabal/scripts/blob/master/ogg-cover-art
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USAGE
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ogg-cover-art [COVER-FILENAME] META-FILENAME
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convert normal image into ogg supported metadata
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EOF
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exit
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}
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die(){ printf "Error: ${1}\n" 1>&2; exit 1; }
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require(){ command -v $1 > /dev/null 2>&1 || { suggestion=""; if [ ! -z "$2" ]; then suggestion=" $2"; fi; die "$1 is not installed.${suggestion}"; } }
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if [ $# -eq 1 ]; then if [ "$1" = "--help" -o "$1" = "-h" ]; then usage; fi fi
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#End boilerplate
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#require "opuscomment.pl" "Try: apt-get install opus-tools"
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if [ $# -eq 0 ]; then
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usage
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fi
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imagePath=""
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if [ $# -eq 1 ]; then
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imagePath="$1"
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fi
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if [ ! -f "${imagePath}" ]; then
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die "Couldn't find cover image."
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fi
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imageMimeType=$(file -b --mime-type "${imagePath}")
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if [ "${imageMimeType}" != "image/jpeg" -a "${imageMimeType}" != "image/png" ]; then
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die "Cover image isn't a jpg or png image."
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fi
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#Insert cover image from file
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#metadata_block_picture format
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#See: https://xiph.org/flac/format.html#metadata_block_picture
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imageWithHeader="$(mktemp -t "tmp.XXXXXXXXXX")"
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description=""
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#Reset cache file
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echo -n "" > "${imageWithHeader}"
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#Picture type <32>
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printf "0: %.8x" 3 | xxd -r -g0 >> "${imageWithHeader}"
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#Mime type length <32>
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printf "0: %.8x" $(echo -n "${imageMimeType}" | wc -c) | xxd -r -g0 >> "${imageWithHeader}"
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#Mime type (n * 8)
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echo -n "${imageMimeType}" >> "${imageWithHeader}"
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#Description length <32>
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printf "0: %.8x" $(echo -n "${description}" | wc -c) | xxd -r -g0 >> "${imageWithHeader}"
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#Description (n * 8)
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echo -n "${description}" >> "${imageWithHeader}"
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#Picture with <32>
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printf "0: %.8x" 0 | xxd -r -g0 >> "${imageWithHeader}"
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#Picture height <32>
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printf "0: %.8x" 0 | xxd -r -g0 >> "${imageWithHeader}"
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#Picture color depth <32>
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printf "0: %.8x" 0 | xxd -r -g0 >> "${imageWithHeader}"
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#Picture color count <32>
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printf "0: %.8x" 0 | xxd -r -g0 >> "${imageWithHeader}"
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#Image file size <32>
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printf "0: %.8x" $(wc -c "${imagePath}" | cut --delimiter=' ' --fields=1) | xxd -r -g0 >> "${imageWithHeader}"
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#Image file
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cat "${imagePath}" >> "${imageWithHeader}"
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echo "metadata_block_picture=$(base64 --wrap=0 < "${imageWithHeader}")"
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#Delete temp files
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rm "${imageWithHeader}"
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