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ABCtoCSV1.rb
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ABCtoCSV1.rb
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#ABCtoCSV1.rb
#14Sep2017
# Specify the path and in and out filenames
# note path in fname uses / not \
inname="C:/Users/jj/Documents/soundPi/abctocsvmaster/testscale.abc"
outfname="C:/Users/jj/Documents/soundPi/abctocsvmaster/testscale.csv"
# specify which note of chord to use as am index 0.n
chrdindex=0
# set up lists of flats and sharps
flatlist=""
sharplist=""
# setup array to hold SP output
tune=[]
# start with the SP headers
tune.push("octave,tone,time")
# set up hdrinfo hash
hdrinfo={time: 1.0,flatlist: flatlist,sharplist: sharplist}
tune.push(hdrinfo)
puts tune
######################
# define strings containing sets of characters
#stnote ="abcdefgABCDEFGzZ"
## use set strings to test set membership
def testset(w,set)
if (w==nil)then return 0 end
if (set==nil)then return 0 end
return set.include? w
end
############################
# the parseBlack function
def parseBlack(flatlist,sharplist, note, modifier)
note=note[0]
if modifier=="=" then return note end
if modifier == "_" then return note+"b" end
if modifier == "^" then return note+"s" end
if flatlist.length>0
if testset(note,flatlist)
return note+"b"
end
# return note
end
if sharplist.length>0
if testset(note,sharplist)
return note+"s"
end
# return note
end
return note
end
#############################
def parseFraction(hdr)
# puts "hdr=",hdr
a=hdr.split("/")
if(a.length<2)
# puts a[0].to_f
return a[0].to_f
else
b=a[0].to_f
c=a[1].to_f
return a[0].to_f / a[1].to_f
end
end
#####################
#def processnote(tune,note)
# if note==nil then return end
# puts "note= ",note
# a=tune.pop
# tune.push(note)
# tune.push(a)
#end
def processnote(tune,note)
if note==nil then return end
hdrinfo=tune.pop
a=hdrinfo[:time]
#puts "note= ",note
octave=4.0
tone="r"
time=a
blacknote=""
divflg=0
# step thru the note string
i=0
loop do
#puts note[i]
#look for ABC sharp, flat or natural
if testset(note[i],"^=_")
blacknote=note[i]
end
if testset(note[i],"ABCDEFGR")
#tone=note[i]+blacknote
tone=parseBlack(hdrinfo[:flatlist],hdrinfo[:sharplist], note[i], blacknote)
octave=4.0
end
if testset(note[i],"abcdefgr")
#tone=note[i]+blacknote
tone=parseBlack(hdrinfo[:flatlist],hdrinfo[:sharplist], note[i], blacknote)
octave=5.0
end
if note[i]=="/" then divflg=1 end
if testset(note[i],"0123456789")
note1=note[i..note.length-1]
#puts note1
if divflg>0
time=time/note1.to_f
else
time=time*note1.to_f
end
break
end
if note[i]=="'" then octave+=1 end
if note[i]=="," then octave-=1 end
i+=1
break if i>=note.length
end
tune.push(octave.to_s+","+tone+","+time.to_s)
#tune.push(a)
tune.push(hdrinfo)
#puts tune
end
#def processchd(tune,chd)
# puts "chd= ",chd
# a=tune.pop
# tune.push(chd)
# tune.push(a)
#end
def processchd(tune,sss,n)
chd=[]
#puts "sss= ",sss
## need to add the case of digit or /digit(s) after "]"
sss=sss.chop
#puts "sss= ",sss
sss.reverse!
sss=sss.chop
sss.reverse!
#puts "sss= ",sss
b=0
while b<sss.length
####### see if note starts with a sharp, flat or natural symbol
startflat=""
if testset(sss[b],"^_=")
#puts "SF=",sss[b],b
startflat=sss[b]
b+=1
end
#####look for individual notes
ept=0
if testset(sss[b],"abcdefgABCDEFGzZ")
#puts "looknote",b,sss[b]
start=b
ept=b+1
loop do
break if testset(sss[ept],"^_=")
break if testset(sss[ept],"abcdefgABCDEFGzZ")
break if sss[ept]=="|"
ept=ept+1
end
ending=ept-1
b=ending #+1
#puts start,ending,b,sss[start..ending],sss[b]
chd.push( sss[start..ending])
#puts chd
end
###
b+=1
break if b>=sss.length
end
processnote(tune,chd[n])
end
def processheader(tune,hdr)
puts "hdr= ",hdr
case hdr[0]
when "L"
hdrinfo=tune.pop
hdr=hdr[2..hdr.length]
hdrinfo[:time]=parseFraction(hdr)
tune.push(hdrinfo)
puts tune
end
end
######################
ggg=""
File.open(inname, "r") do |fh|# open and write to a file with ruby
sss=""
while sss!= nil
#sss=fh.gets
#puts "sst",sss
####### Look for Header info Letter followed by a :
b=0
while b<sss.length
if(b<1)
if(sss[1]==":") #special commands
processheader(tune,sss)
b=sss.length+1 # skip to end
break
end
end
#puts "bhdr=",b
if sss[b]=="%" then break end
#if sss[b]=="|"
#break if sss[b]=="]"
#if sss[b]=="|" then break end
#if sss[b]=="%" then break end
##### look for chords
ept=0
if(sss[b]=="[")
start=b
ept=b+1
loop do
# puts "lll=",sss[start..ept]
break if sss[ept]=="]"
break if sss[ept]=="|"
ept=ept+1
end
ending=ept
## need to look for "/0123456789 " after the "]"
b=ending+1
processchd(tune,sss[start..ending],chrdindex)
end
####### see if note starts with a sharp, flat or natural symbol
startflat=""
if testset(sss[b],"^_=")
#puts "SF=",sss[b],b
startflat=sss[b]
b+=1
end
#####look for individual notes
ept=0
if testset(sss[b],"abcdefgABCDEFGzZ")
#puts "looknote",b,sss[b]
start=b
ept=b+1
loop do
break if testset(sss[ept],"^_=")
break if testset(sss[ept],"abcdefgABCDEFGzZ")
break if sss[ept]=="|"
ept=ept+1
end
ending=ept-1
b=ending #+1
#K:Bb
#B2 A B G2 |B2 A B G2 |B2 A B G2 |B2 A B G2 |
#puts start,ending,b,sss[start..ending],sss[b]
processnote(tune,startflat+sss[start..ending])
end
b+=1
#puts "b=",b
end
sss=fh.gets
if(sss != nil) then sss=sss.chomp end
b=0
end
end
puts "Writing to file"
tune.pop # remove the header
open(outfname, 'w') { |f|
tune.each {|x| f.puts x }
#f.puts "octave,tone,time"
}
i=0
while i<tune.length
# puts tune[i]
i+=1
end