prevent lame from resampling

atom

@@ -23,6 +23,7 @@ declare -A			\
 	destinationpath		\
 	destinationquality	\
 	destinationrename	\
+	destinationnoresample	\
 	destinationrenamepath	\
 	destinationskipmime	\
 || {
@@ -218,6 +219,21 @@ getConfigDestination() {
 			unset expr
 			destinationfrequency["$destination"]=$value
 		;;
+		'noresample')
+			case $value in
+				'true'|'on'|'yes')
+					destinationnoresample["$destination"]=1
+				;;
+				'false'|'off'|'no')
+					destinationnoresample["$destination"]=0
+				;;
+				*)
+					echo "noresample takes values:"	\
+					"'yes' ,'true' ,'on', 'no', 'false',"\
+					"'off'"
+				;;
+			esac
+		;;	
 		'rename')
 			case "$value" in
 				*/*)
@@ -1076,6 +1092,38 @@ encodeFile::mp3() {
 	[ -n "$title"	] && lameopts+=" --tt \"$title\""
 	[ -n "$track"	] && lameopts+=" --tn \"$track\""
 	[ -n "$year"	] && lameopts+=" --ty \"$year\""
+	if (( ${destinationnoresample[$destination]:-0} == 1 ))
+	then
+		# If 'rate' is not one of these value, it cannot be encoded to
+		# MP3, in which case we'd be better of letting lame decide which
+		# rate to use.
+		if [ -n "${destinationfrequency["$destination"]}" ]
+		then
+			case ${destinationfrequency["$destination"]} in
+				48000)	lameopts+=" --resample 48"	;;
+				44100)	lameopts+=" --resample 44.1"	;;
+				32000)	lameopts+=" --resample 32"	;;
+				24000)	lameopts+=" --resample 24"	;;
+				22050)	lameopts+=" --resample 22.05"	;;
+				16000)	lameopts+=" --resample 16"	;;
+				12000)	lameopts+=" --resample 12"	;;
+				11025)	lameopts+=" --resample 11.025"	;;
+				8000)	lameopts+=" --resample 8"	;;
+			esac
+		else
+			case $rate in
+				48000)	lameopts+=" --resample 48"	;;
+				44100)	lameopts+=" --resample 44.1"	;;
+				32000)	lameopts+=" --resample 32"	;;
+				24000)	lameopts+=" --resample 24"	;;
+				22050)	lameopts+=" --resample 22.05"	;;
+				16000)	lameopts+=" --resample 16"	;;
+				12000)	lameopts+=" --resample 12"	;;
+				11025)	lameopts+=" --resample 11.025"	;;
+				8000)	lameopts+=" --resample 8"	;;
+			esac
+		fi
+	fi
 	encodetaskid=$(
 		Insert tasks <<-EOInsert
 			key		${fileid}lame$destination

doc/config

@@ -92,3 +92,7 @@ Sections:
   MP3 parameters:
     * bitrate <bitrate>: Set ABR to <bitrate>. Again, if you want CBR or any
       other mode supported by lame, please fork and file a pull request.
+    * noresample <yes>/<no>: LAME may decide to encode your file to a lower
+      sampling-rate if you use a low bitrate. Setting this to yes will
+      append --resample <original file's rate>, preventing any resampling from
+      happening.

doc/example.cfg

@@ -25,14 +25,15 @@ copy_mime-type	image/*
 copy_mime-type	text/*
 
 [MP3]
-path	/mnt/Musique-mp3.test
+path		/mnt/Musique-mp3.test
-format	mp3
+format		mp3
-bitrate	96
+bitrate		96
+noresample	yes
 normalize	yes
 higher-than	128
 
 # rename file, path unchanged
-rename	%{track}--%{artist}-%{title}
+rename		%{track}--%{artist}-%{title}
 # change the whole filepath
 #rename	%{genre}/%{albumartist}/%{year}-%{album}/%{track}--%{artist}-%{title}
 skip_mime-type	image/*