Mercurial > dottes
annotate makeWebAudio.sh @ 694:8bcb5ad3dd5e build-default-274
Add start of repeat to B tune so that abc2midi does the B tune repeat.
author | Jim Hague <jim.hague@acm.org> |
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date | Sun, 17 Sep 2017 19:45:34 +0100 |
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children | ce5c7214f9aa |
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First go at producing a very simple website.
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1 #!/bin/bash |
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2 # |
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3 # Make audio required for the website but not for the book. |
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4 # They go into web/<book>. |
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5 # |
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6 |
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7 if [ $# != 1 ]; then |
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8 echo "Usage: makeWebAudio.sh <book dir name>" |
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9 exit 1 |
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10 fi |
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11 |
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12 dir=`pwd` |
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13 |
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14 booke=$dir/$1 |
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15 builddir=$dir/web/$1 |
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16 |
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17 mkdir -p $builddir |
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18 |
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19 # Make MP3 and OGG files for the input .abc. Since we're listening to |
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20 # a doorbell playing the tunes, go for lowest quality (and hence smallest) |
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21 # MP3 and OGG. $1 is the input filename, $2 is optional args for timidity. |
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22 makeaudiofiles() |
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23 { |
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24 name=`basename $1 .abc` |
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25 |
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26 abc2midi $1 -o $builddir/${name}.mid |
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27 timidity -OwM $2 -o $builddir/${name}.wav $builddir/${name}.mid |
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28 lame -m m -V 9 --quiet $builddir/${name}.wav $builddir/${name}.mp3 |
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29 # Timidity can generate OGG directly. But we need to generate WAV |
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30 # for lame, and oggenc produces smaller output. OGG is needed for |
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31 # Firefox's audio tag. FF doesn't support MP3, some others support |
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32 # MP3 but not OGG. |
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33 oggenc -Q -q 0 -o $builddir/${name}.ogg $builddir/${name}.wav |
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34 |
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35 rm $builddir/${name}.wav |
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36 } |
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37 |
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38 # Make audio for a new tempo for the abc file $1, giving the output files |
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39 # the same name with a prefix $2. The new tempo is the original tempo |
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40 # (120 used if not specified), multiplied by $3 and divided by $4. |
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41 # These audio files are for Learner use; I've found that having the |
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42 # chords thumping away can make it hard to distinguish the melody, so |
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43 # arrange for timidity to mute everything except the melody track. |
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44 makeaudiofortempo() |
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45 { |
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46 name=`basename $filename .abc` |
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47 newspeedfilename="$2-${name}.abc" |
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48 |
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49 # Prepare new speed audio files. |
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50 # The tempo is either a plain number, or <notelen>=<number>. |
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51 tempo=`$dir/abcfield.py --field Q $1` |
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52 if [ -z $tempo ]; then |
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53 echo "Warning: $1 has no tempo. Using 120." |
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54 tempo="120" |
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55 fi |
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56 pos=`expr index $tempo '='` |
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57 numtempo=${tempo:pos} |
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58 notelenprefix=${tempo:0:pos} |
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59 # Calculate new tempo. |
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60 newtempo=$(( ( $numtempo * $3 ) / $4 )) |
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61 # Insert new tempo and delete old. Old may not exist, |
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62 # so do this rather than overwrite. |
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63 sed -e "/^Q:/d" -e "/^K:/aQ: ${notelenprefix}${newtempo}" $1 > $builddir/$newspeedfilename |
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64 makeaudiofiles $builddir/$newspeedfilename --mute=0,-1 |
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65 rm $builddir/$newspeedfilename |
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66 } |
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67 |
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68 # Generate audio files and slow speed (currently half speed) audio files. |
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69 find $booke -name "*.abc" | sort | |
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70 while read filename |
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71 do |
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72 makeaudiofiles $filename |
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73 |
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74 # Now make 1/4, 1/2 and 3/4 speed audio. |
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75 makeaudiofortempo $filename "veryslow" 1 4 |
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76 makeaudiofortempo $filename "slow" 2 4 |
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77 makeaudiofortempo $filename "littleslow" 3 4 |
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78 makeaudiofortempo $filename "normal" 4 4 |
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79 done |