multi-byte characters removal, from "while read" to awk.

get-tracks.sh

@@ -1,74 +1,119 @@
 #!/usr/bin/env sh
 
-get_time(){
+regroup_lines(){
-	echo "$*" | sed "s/[ \t].*//"
+	awk '
+	BEGIN {
+		first=1
+	}
+
+	{
+		if (first == 1)
+			line = $1;
+		else
+			line = line " " $1;
+
+		first = 0;
+		if ($1 == "0a") {
+			print line;
+			first = 1
+		}
+	}
+
+	END {
+		if (first == 0)
+			print line
+	}
+	'
 }
 
-get_title(){
+simple_quote(){
-	echo "$*" | cut -d ' ' -f 2-
+	sed "s/e2 80 99/27/g"
 }
 
-reverse_word_order(){
+remove_multibyte_characters(){
-	local result=
+	sed "s/e2 80 .. //g"
-	for word in $@; do
-		result="$word $result"
-	done
-	echo "$result" 
 }
 
-# bc is mandatory: arythmetic operations are very limited in ash.
+to_hex_one_colomun(){
-get_seconds(){
+	xxd -p -c 1
-	number_position=0
+}
-	value=0
 
-	values=$(echo "$*" | sed 's/:/\
+from_hex(){
-/g' | sed "s/^0//")
+	xxd -p -r
-	for i in $(reverse_word_order $values); do
+}
-		case $number_position in
-			0) value=$(echo "$value +         $i " | bc);;
-			1) value=$(echo "$value + (60   * $i)" | bc);;
-			2) value=$(echo "$value + (3600 * $i)" | bc);;
-			*) echo "invalid timecode $*"; exit 1;;
-		esac
 
-		number_position=$((number_position+1))
+to_ascii(){
-	done
+	to_hex_one_colomun |
+		regroup_lines |
+		simple_quote |
+		remove_multibyte_characters |
+		from_hex
+}
 
-	echo $value
+process_durations(){
+	awk -v NONUMBER="$NONUMBER" -v SEPARATOR="$SEPARATOR" '
+
+	BEGIN {
+		OFS="	"
+	}
+
+	{
+		if (NR > 1) {
+			print timestamp, $1, title;
+		}
+
+		timestamp = $1;
+
+		if (NONUMBER == 1) {
+			title = $2
+		}
+		else {
+			if (NR < 10) {
+				title = "0" NR SEPARATOR $2
+			}
+			else {
+				title = NR SEPARATOR $2
+			}
+		}
+		for (i=3; i <= NF; i++) {
+			title = title " " $i
+		}
+	}
+
+	END {
+		print timestamp, "END_OF_FILE", title;
+	}
+	'
+}
+
+first_column_to_seconds(){
+	awk '
+	{
+		# from 10:30 to 630
+		n = split ($1, arr, ":")
+		for (i = 0; i <= n; i++) {
+			if (i == 0) {
+				v = arr[n-i];
+			}
+			else if (i == 1) {
+				v += 60 * arr[n-i];
+			}
+			else if (i == 2) {
+				v += 3600 * arr[n-i];
+			}
+		}
+
+		$1 = v;
+		print;
+		v = 0;
+	}
+	'
 }
 
 # Get a more usable time representation for the beginning and the end of songs.
-get_values(){
+process_time_file(){
-
+	time_file="$1"
-	audio_file="$1"
+	to_ascii < "$time_file" | first_column_to_seconds | process_durations
-	time_file="$2"
-
-	track_number=1
-
-	while read X; do
-
-		if [ $track_number -ne 1 ]; then
-			to_unformatted=$(get_time $X)
-			to_s=$(get_seconds $to_unformatted)
-			echo "$from_s	$to_s	$title"
-		fi
-
-		from_unformatted=$(get_time $X)
-		from_s=$(get_seconds $from_unformatted)
-		title=$(get_title $X)
-
-		if [ "$NONUMBER" = "" ]; then
-			track_n=$track_number
-			if [ $track_number -lt 10 ]; then
-				track_n="0$track_number"
-			fi
-			title="${track_n}${SEPARATOR}${title}"
-		fi
-
-		track_number=$(echo $track_number + 1 | bc)
-	done < "${time_file}"
-
-	echo "$from_s	$eof_marker	$title"
 }
 
 run_ffmpeg(){
@@ -114,11 +159,11 @@ rip(){
 	audio_file="$1"
 	time_file="$2"
 
-	get_values "$audio_file" "$time_file" | while read LINE; do
+	process_time_file "$time_file" | while read LINE; do
 		track_start_s=$(echo $LINE | cut -d ' ' -f 1)
 		track_end_s=$(echo $LINE | cut -d ' ' -f 2)
 		track_title=$(echo $LINE | cut -d ' ' -f 3-)
-		if [ "$track_end_s" != "$eof_marker" ]; then
+		if [ "$track_end_s" != "END_OF_FILE" ]; then
 			track_duration=$(echo "$track_end_s - $track_start_s" | bc)
 		else
 			track_duration=""
@@ -137,7 +182,7 @@ usage(){
 	echo "show output format: start end title"
 	echo
 	echo "envvar: SIMULATION, if non empty, do not invoke ffmpeg"
-	echo "envvar: NONUMBER, if non empty, do not write song number"
+	echo "envvar: NONUMBER, if equals 1, do not write song number"
 	echo "envvar: FORMAT [mp3,ogg,opus,…], see the ffmpeg documentation"
 	echo "envvar: SEPARATOR [separator] (default: ' - '), write song number, with this separator"
 	echo "        example with SEPARATOR='_': song names will be 01_song.opus 02_song.opus…"
@@ -158,17 +203,31 @@ shift
 if [ "$FORMAT" = "" ]; then
 	echo "default FORMAT: opus"
 	FORMAT="opus"
+else
+	echo "FORMAT: $FORMAT"
 fi
 
 if [ "$VERBOSITY" = "" ]; then
 	echo "default VERBOSITY: 1"
 	VERBOSITY=1
+else
+	echo "VERBOSITY level: $VERBOSITY"
 fi
 
-# Assume that there should be a separator.
+if [ "$NONUMBER" = "" ]; then
-if [ "$SEPARATOR" = "" ]; then
+	echo "default NONUMBER: disabled"
+	NONUMBER=0
+
+	# Assume that there should be a separator.
+	if [ "$SEPARATOR" = "" ]; then
 		echo "default SEPARATOR: ' - '"
 		SEPARATOR=" - "
+	else
+		echo "SEPARATOR: '$SEPARATOR'"
+	fi
+else
+	echo "NONUMBER: won't prefix tracks"
+	SEPARATOR=""
 fi
 
 if [ "$SIMULATION" != "" ]; then
@@ -178,7 +237,18 @@ fi
 # soxi provides the total length of the music file.
 #which soxi 2>/dev/null
 #total_length=$(soxi -D "${audio_file}" | sed "s/\..*//") # integer values only
-eof_marker="END_OF_FILE"
+
+</dev/null xxd -p >/dev/null 2>/dev/null
+if [ $? -ne 0 ]; then
+	echo "xxd: you don't have an xxd program with '-p' option." 1>&2
+	exit 1
+fi
+
+</dev/null xxd -r >/dev/null 2>/dev/null
+if [ $? -ne 0 ]; then
+	echo "xxd: you don't have an xxd program with '-r' option." 1>&2
+	exit 1
+fi
 
 case "x-${command}" in
 	x-show)
@@ -189,7 +259,7 @@ case "x-${command}" in
 			exit 1
 		fi
 
-		get_values "$1" "$2"
+		process_time_file "$2"
 		;;
 
 	x-rip)
@@ -203,6 +273,10 @@ case "x-${command}" in
 		rip "$1" "$2"
 		;;
 
+	x-input)
+		to_ascii < "$1"
+		;;
+
 	*)
 		usage 1>&2
 		exit 1