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Make slow speed web audio files.

This commit is contained in:
Jim Hague 2013-09-01 23:13:06 +01:00
parent 3dc65395b4
commit 5a08c5c1b0
1 changed files with 43 additions and 16 deletions
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41
makeWebAudio.sh
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@ -16,15 +16,15 @@ builddir=$dir/web/$1
mkdir -p $builddir mkdir -p $builddir
# Now, for each tune, make the tune bitmap and sound. Do this to temp # Make MP3 and OGG files for the input .abc. In case we're generating
# files and rename into place to make updates as atomic as possible. # to a live site (which we won't be), do this to temp files and rename
find $booke -name "*.abc" | sort | # into place to make updates as atomic as possible.
while read filename makeaudiofiles()
do {
name=`basename $filename .abc` name=`basename $1 .abc`
tmpname=${name}.tmp tmpname=${name}.tmp
abc2midi $filename -o $builddir/${tmpname}.mid abc2midi $1 -o $builddir/${tmpname}.mid
timidity -OwM -o $builddir/${tmpname}.wav $builddir/${tmpname}.mid timidity -OwM -o $builddir/${tmpname}.wav $builddir/${tmpname}.mid
lame -m m -V 9 --quiet $builddir/${tmpname}.wav $builddir/${tmpname}.mp3 lame -m m -V 9 --quiet $builddir/${tmpname}.wav $builddir/${tmpname}.mp3
# Timidity can generate OGG directly. But we need to generate WAV # Timidity can generate OGG directly. But we need to generate WAV
@ -37,4 +37,31 @@ find $booke -name "*.abc" | sort |
mv $builddir/${tmpname}.mp3 $builddir/${name}.mp3 mv $builddir/${tmpname}.mp3 $builddir/${name}.mp3
mv $builddir/${tmpname}.ogg $builddir/${name}.ogg mv $builddir/${tmpname}.ogg $builddir/${name}.ogg
rm $builddir/${tmpname}.wav rm $builddir/${tmpname}.wav
}
# Generate audio files and slow speed (currently half speed) audio files.
find $booke -name "*.abc" | sort |
while read filename
do
makeaudiofiles $filename
name=`basename $filename .abc`
slowspeedfilename="slowspeed-${name}.abc"
# Prepare slow speed audio files.
# The tempo is either a plain number, or <notelen>=<number>.
tempo=`$dir/abcfield.py --field Q $filename`
if [ -z $tempo ]; then
echo "Warning: $filename has no tempo. Using 120."
tempo="120"
fi
pos=`expr index $tempo '='`
numtempo=${tempo:pos}
notelenprefix=${tempo:0:pos}
# Make new tempo half original speed.
newtempo=$(( $numtempo / 2 ))
# Insert new tempo and delete old. Old may not exist,
# so do this rather than overwrite.
sed -e "/^Q:/d" -e "/^K:/aQ: ${notelenprefix}${newtempo}" $filename > $builddir/$slowspeedfilename
makeaudiofiles $builddir/$slowspeedfilename
done done