Shlomi Fish <shlo...@shlomifish.org> writes:
> hi Martin,
> you can try using an FFI, eg:
>
> https://metacpan.org/dist/Inline-C/view/lib/Inline/C.pod
>
> https://metacpan.org/dist/Inline-Python/view/Python.pod
>
> https://metacpan.org/pod/FFI::Platypus
Many thanks. I am glad I asked the question but it has taken me
some time to digest your answer as I wasn't familiar with the
term FFI so, after exercising duckduckgo, I now know those
letters stand for Foreign Function Interface which makes perfect
sense based on what needs to be done. Unfortunately, FFI's are
usually used by higher-level languages to take advantage of the
capabilities found in lower-level languages such as C which is
closer to assembler and can efficiently access the hardware such
as an audio or video device.
I was hoping there might be a perl module like a
fictional one I will call Device::ALSA which would understand the
syntax used in capturing audio from a microphone or line input,
like a microphone input, only not as sensitive, where one
customarily feeds sound from the output of whatever one is
recording from.
There are standard alsa conventions for setting sample
rate and other parameters which I mentioned in the earlier
posting so if one knows what sort of digital stream they nead,
they just stuff those values in to the function whose output is
that stream of digital data. What you do with those data is up
to you but the module takes care of getting the bits from the
hardware or sending the bits to your speakers or headphones and
would also support the alsa plugins which are used by the arecord
and aplay utilities for added capabilities.
I can understand why there is no perl module like
Device::alsa because it would not be portable between Windows and
Linus. The l in alsa is for Linux so basically, I was just
curious to see if anything like Device::ALSA existed and it
apparently does not exist.
Anyway, the FFI concept will probably someday come in
handy for a different project so I will continue with the C I was
working on.
Thanks again.
Martin
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