[fpc-pascal] Create class descendant at runtime?

Mark Morgan Lloyd markMLl.fpc-pascal at telemetry.co.uk
Wed Apr 30 10:18:00 CEST 2014


Michael Schnell wrote:
> On 04/29/2014 06:59 PM, Mark Morgan Lloyd wrote:
>>
>> In my case it was a MIDI filter:...
> Ahh, one keyboarder more on this list :-) .
> 
> Hi to you.

Only marginally. A small and elderly Yamaha hooked up to PianoBooster 
and a MIDI output box, with Brighton/Bristol available as an alternative 
output device.

> (off topic:
> I once successfully tested doing MIDI/Audio VST plugins with Delphi, 
> using an appropriate SDK that is available in the Internet.
> Right now I am done building a Windows embedded PC based blackbox for 
> the sound software I use with a keyboard. Doing VS Plugins with fpc 
> myself would be a nice option, but of course this box completely is on 
> 64 Bit and I did not find an SDK to be used on this behalf. Did you ?
> )

I remember. In my case I'm interfacing to ALSA on 32-bit x86 Linux, I 
found a couple of sets of declarations etc. in Pascal... I can't 
remember whether one of them was adequate or if I merged them in some 
way. It seems to me that ALSA needs a lot of housekeeping code to do 
comparatively simple jobs.

In part, the project was an experiment in interfacing plugins etc.  I 
was interested to explore the extent to which a plugin could be written 
as both a library and as a standalone program, in an attempt to conform 
to the spirit of GPL (answer: on unix it can't).

-- 
Mark Morgan Lloyd
markMLl .AT. telemetry.co .DOT. uk

[Opinions above are the author's, not those of his employers or colleagues]


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