Remove xxd dep & '\'. Change fun. names. </d/n in while read block. Comments.
parent
3f892dc644
commit
51538fd5c3
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@ -1,7 +1,8 @@
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#!/usr/bin/env sh
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# From a single byte in hexadecimal per line
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# to lines ending with 0a (hex for '\n').
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# From a single byte in hexadecimal per line to lines ending with 0a
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# (hex for '\n'). Ex: 61 62 63 0a
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# Required to easily match (and remove) multi-byte characters.
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regroup_lines() awk '
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BEGIN {
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line_start=1
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@ -32,25 +33,40 @@ simple_quote() sed "s/e2 80 99/27/g"
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# From / to '-'
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replace_slashes() sed "s/2f/2d/g"
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remove_backslashes() sed "s/5c//g"
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remove_multibyte_characters() sed "s/e2 80 .. //g"
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uppercase() tr "[a-z]" "[A-Z]"
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# One column decimal to plain text.
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from_dec() awk '{ printf ("%c", $1 + 0) }'
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# Replace spaces by line returns, outputs a single column.
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spaces_to_line_returns() tr " " "\n"
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# Convert input into hexadecimal and a single byte per line.
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to_hex_one_column() xxd -p -c 1
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to_hex_one_column() { od -An -tx1 | awk '{for(i=1;i<=NF;i++){ print $i }}'; }
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# Reverse hexadecimal to original value.
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from_hex() xxd -p -r
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# One column hexa to one column decimal.
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hex_to_dec() { { echo "obase=10;ibase=16;" ; cat ; } | bc ; }
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# Remove non ascii characters, convert "’" to "'", or remove invalid filename characters.
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# Reverse hexadecimal (with space separators) to original value.
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from_hex() { spaces_to_line_returns | uppercase | hex_to_dec | from_dec; }
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# Remove non ascii, backslashes and invalid filename characters,
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# convert "’" to "'", "/" to " - ".
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to_ascii(){
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to_hex_one_column | # Convert input into hexadecimal and a single byte per line.
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regroup_lines | # Required to easily match multi-byte characters.
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simple_quote | # Convert "’" to "'".
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replace_slashes | # Replace / by ' - ', since it isn't a valid filename character.
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to_hex_one_column | # Input to hexadecimal, 1-byte representation per line.
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regroup_lines | # From 1-byte to x-byte lines with space separators.
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simple_quote | # From "’" to "'".
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replace_slashes | # From / to '-'.
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remove_multibyte_characters | # Remove non ascii values.
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from_hex # Convert back from hex.
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remove_backslashes | # Can mess with the script.
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from_hex # Convert back from hex (x-byte per line, space separator).
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}
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process_end_of_songs() awk -v NONUMBER="$NONUMBER" -v SEPARATOR="$SEPARATOR" '
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comp_end_of_tracks() awk -v NONUMBER="$NONUMBER" -v SEPARATOR="$SEPARATOR" '
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BEGIN {
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OFS=" "
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}
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@ -106,7 +122,7 @@ first_column_to_seconds() awk '
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'
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# Get a more usable time representation for the beginning and the end of songs.
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process_time_file(){ to_ascii | first_column_to_seconds | process_end_of_songs ; }
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get_timestamps(){ to_ascii | first_column_to_seconds | comp_end_of_tracks; }
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run_ffmpeg(){
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file=$1
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@ -139,15 +155,15 @@ run_ffmpeg(){
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esac
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if [ "$SIMULATION" = "" ]; then
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$(< /dev/null ffmpeg $LOG_LEVEL $FROM $TO -i "$INPUT_FILE" "$OUTPUT_FILE")
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ffmpeg $LOG_LEVEL $FROM $TO -i "$INPUT_FILE" "$OUTPUT_FILE"
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fi
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}
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rip(){
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extraction(){
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audio_file="$1"
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time_file="$2"
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process_time_file < "$time_file" | while read LINE; do
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get_timestamps < "$time_file" | while read LINE; do
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track_start=$(echo $LINE | cut -d ' ' -f 1)
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track_end=$(echo $LINE | cut -d ' ' -f 2)
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track_title=$(echo $LINE | cut -d ' ' -f 3-)
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@ -156,7 +172,12 @@ rip(){
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track_end=""
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fi
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run_ffmpeg "${audio_file}" "${track_start}" "${track_end}" "${track_title}.${FORMAT}"
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# Input is /dev/null, otherwise subshells will take the output
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# of "get_timestamps" as input.
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# Be careful: "while read X" is a dangerous shell design.
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< /dev/null run_ffmpeg "${audio_file}" \
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"${track_start}" "${track_end}" \
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"${track_title}.${FORMAT}"
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done
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}
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@ -192,11 +213,6 @@ Environment variables:
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END
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}
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if [ $# -lt 1 ]; then
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usage
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exit 0
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fi
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header(){
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if [ "$HEADERS" = "1" ]; then
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echo $*
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@ -237,20 +253,9 @@ if [ "$SIMULATION" != "" ]; then
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header "SIMULATION envvar is set: this is a simulation."
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fi
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</dev/null xxd -p >/dev/null 2>/dev/null
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if [ $? -ne 0 ]; then
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echo "xxd: you don't have an xxd program with '-p' option." 1>&2
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exit 1
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fi
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</dev/null xxd -r >/dev/null 2>/dev/null
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if [ $? -ne 0 ]; then
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echo "xxd: you don't have an xxd program with '-r' option." 1>&2
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exit 1
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fi
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case $# in
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1) process_time_file < "$1" ;;
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2) rip "$1" "$2" ;;
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0) usage; exit 0;;
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1) get_timestamps < "$1" ;;
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2) extraction "$1" "$2" ;;
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*) usage 1>&2 ; exit 1 ;;
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esac
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