The "Write Wav" button now lets the user download the resulting wav file
on web. Sadly, we cannot directly get a PackedByteArray from
AudioStreamWAV - the WAV header is only written as part of its
save_to_wav() method, which only accepts a string to a file and does all
the file handling itself. Therefore we now write the file to (temp)
disk, re-read it and then send it to the user. The other options I
currently see are a) to write the WAV header myself b) find a better way
to write a tempfile (at least tempfile naming seems to be a Godot >4.3
feature) or c) to contribute a get_wav_header() method AudioStreamWAV
upstream.
The "standardized" mimetype for wav seems to be audio/vnd.wave and not
audio/wav - I never knew! Many seem to point to RFC2361 regarding to
this.
Before this every instance of the MorseBanner had its own state, but as
we want to use the state also for other purposes, it doesn't make sense
to keep it in each instance. Therefore we now have an autoload that
keeps the state as a singleton. The MorseBanner now gets its state from
the autoload, so no more communication is needed between the main part
and the MorseBanner.
Sebastian Lohff