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Make slow speed web audio files.
author Jim Hague <jim.hague@acm.org>
date Sun, 01 Sep 2013 23:13:06 +0100
parents c5d404bf68a3
children aeef7b1ca0ad
comparison
equal deleted inserted replaced
393:c5d404bf68a3 394:ae9c05d2aafd
14 booke=$dir/$1 14 booke=$dir/$1
15 builddir=$dir/web/$1 15 builddir=$dir/web/$1
16 16
17 mkdir -p $builddir 17 mkdir -p $builddir
18 18
19 # Now, for each tune, make the tune bitmap and sound. Do this to temp 19 # Make MP3 and OGG files for the input .abc. In case we're generating
20 # files and rename into place to make updates as atomic as possible. 20 # to a live site (which we won't be), do this to temp files and rename
21 # into place to make updates as atomic as possible.
22 makeaudiofiles()
23 {
24 name=`basename $1 .abc`
25 tmpname=${name}.tmp
26
27 abc2midi $1 -o $builddir/${tmpname}.mid
28 timidity -OwM -o $builddir/${tmpname}.wav $builddir/${tmpname}.mid
29 lame -m m -V 9 --quiet $builddir/${tmpname}.wav $builddir/${tmpname}.mp3
30 # Timidity can generate OGG directly. But we need to generate WAV
31 # for lame, and oggenc produces smaller output. OGG is needed for
32 # Firefox's audio tag. FF doesn't support MP3, some others support
33 # MP3 but not OGG.
34 oggenc -Q -q 0 -o $builddir/${tmpname}.ogg $builddir/${tmpname}.wav
35
36 mv $builddir/${tmpname}.mid $builddir/${name}.mid
37 mv $builddir/${tmpname}.mp3 $builddir/${name}.mp3
38 mv $builddir/${tmpname}.ogg $builddir/${name}.ogg
39 rm $builddir/${tmpname}.wav
40 }
41
42 # Generate audio files and slow speed (currently half speed) audio files.
21 find $booke -name "*.abc" | sort | 43 find $booke -name "*.abc" | sort |
22 while read filename 44 while read filename
23 do 45 do
46 makeaudiofiles $filename
47
24 name=`basename $filename .abc` 48 name=`basename $filename .abc`
25 tmpname=${name}.tmp 49 slowspeedfilename="slowspeed-${name}.abc"
26 50
27 abc2midi $filename -o $builddir/${tmpname}.mid 51 # Prepare slow speed audio files.
28 timidity -OwM -o $builddir/${tmpname}.wav $builddir/${tmpname}.mid 52 # The tempo is either a plain number, or <notelen>=<number>.
29 lame -m m -V 9 --quiet $builddir/${tmpname}.wav $builddir/${tmpname}.mp3 53 tempo=`$dir/abcfield.py --field Q $filename`
30 # Timidity can generate OGG directly. But we need to generate WAV 54 if [ -z $tempo ]; then
31 # for lame, and oggenc produces smaller output. OGG is needed for 55 echo "Warning: $filename has no tempo. Using 120."
32 # Firefox's audio tag. FF doesn't support MP3, some others support 56 tempo="120"
33 # MP3 but not OGG. 57 fi
34 oggenc -Q -q 0 -o $builddir/${tmpname}.ogg $builddir/${tmpname}.wav 58 pos=`expr index $tempo '='`
35 59 numtempo=${tempo:pos}
36 mv $builddir/${tmpname}.mid $builddir/${name}.mid 60 notelenprefix=${tempo:0:pos}
37 mv $builddir/${tmpname}.mp3 $builddir/${name}.mp3 61 # Make new tempo half original speed.
38 mv $builddir/${tmpname}.ogg $builddir/${name}.ogg 62 newtempo=$(( $numtempo / 2 ))
39 rm $builddir/${tmpname}.wav 63 # Insert new tempo and delete old. Old may not exist,
64 # so do this rather than overwrite.
65 sed -e "/^Q:/d" -e "/^K:/aQ: ${notelenprefix}${newtempo}" $filename > $builddir/$slowspeedfilename
66 makeaudiofiles $builddir/$slowspeedfilename
40 done 67 done