FileIO without filesystem access?

General Usage
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1

I’d like to use Pluto.jl to create a small utility which processes and uploaded audio file. However, I’m unsure how to convert the uploaded audio file into a format usable with JuliaAudio’s ecosystem and SampledSignals.jl .

Through Pluto.jl I have the filename, filetype, and raw data, but as far as I can tell there’s no way to trivially process the raw data into a usable format. Normally I’d use FileIO to read the file directly, but given that the file is uploaded through Pluto I don’t believe this is an option.

Is it possible just to use FileIO to process the raw file data without having it read the file off disk as well? Thank you!

2

You can read the file/data into an IOBuffer (or use your existing data as the memory of the IOBuffer) and put that into FileIO. It should pretty much work out of the box, I think.

3

That appears to work! Thank you!

4

For audio files “FileIO” can read/and write different formats
i.e.

using FileIO, Plots
data, sr = load("../Music/AC_DC/Hells Bells.flac")
start, stop, marker, b = 0.7, 29.3, 19.4, 6000
ct(t) = Int(round(t*sr))
data = data[ct(start):ct(stop),2]

anim = @animate for a = 1:50
    plot(data, grid=false, leg=false, layout=(3,1))
    plot!(data[90a:90a+b], leg=false, annotations=(b,0.28,text(a,12,:right)), sp=2)
    plot!(reverse(data[1:ct(marker)]), leg=false, lc=:orange, sp=3)
end
save("audio.wav",data[1:ct(marker)], samplerate=sr)
gif(anim,"audio animation.gif", fps=10)