Subject: Re: FW: [linux-audio-dev] LADSPA problem
From: Steve Harris (S.W.Harris_AT_ecs.soton.ac.uk)
Date: Tue Oct 24 2000 - 11:43:29 EEST
Could well be me, I only started using LADSPA a few days before I sent
the message, so I probably tried to specify the bounds wrong. I just
pasted some code from the Control bounds section of the example plugin I
started with. I'll have another go later.
If I still can't get it to work, can I send you a code snipet off list,
so you can have a look at it?
- Steve
On Tue, Oct 24, 2000 at 12:54:07AM +0100, Richard W.E. Furse wrote:
> Sorry I didn't post this to the list initially. Haven't recreated/spotted
> the bug in analyseplugin - I'm probably being stupid. Oh, and though the
> code mustn't crash if bounds are exceeded it may sound as horrid as it
> likes ;-)
>
> --Richard
>
> -----Original Message-----
> From: Richard W.E. Furse [SMTP:richard_AT_muse.demon.co.uk]
> Sent: Thursday, October 19, 2000 8:07 PM
> To: 'Steve Harris'
> Subject: RE: [linux-audio-dev] LADSPA problem
>
> It sounds as if you've found a bug in analyseplugin. Bounds are supported
> for audio streams although they are only hints and your code must not crash
> if bounds are exceeded.
>
> I'l have a look at analyseplugin when I have a minute.
>
> Have fun,
>
> --Richard
>
> -----Original Message-----
> From: Steve Harris [SMTP:S.W.Harris_AT_ecs.soton.ac.uk]
> Sent: Thursday, October 19, 2000 6:31 PM
> To: Linux-audio-dev
> Subject: [linux-audio-dev] LADSPA problem
>
> Hi,
>
> I've been playing with LADSPA on and off for a couple of days, but I've
> hit a problem: as far as I can tell the input range of an audio stream is
> not specified, I was expecting it to be -1 to 1, but it looks like the
> host can choose any value it likes.
>
> This causes problems with amplitude dependent plugins. I don't seem to be
> able to specify upper and lower bounds on audio ins (analyseplugin gets
> confused, anyway, always shows 0 to 0).
>
> What are you supposed to do? The limiter I looked at works by asking
> for the threshold (in arbitary units), but this isn't a very good
> solution. Surely the user isn't expected to know the internal ranges
> of thier application? There is a LADSPA_HINT_SAMPLE_RATE, why not a
> LADSPA_HINT_AMPLITUDE?
>
> Hoping I've missed something,
> Steve
>
> --
> Stephen Harris
> MALIBU Technical Officer & JoDI Webmaster
> IAM Research Group
> University of Southampton, UK
> 07970 557047
> swh_AT_ecs.soton.ac.uk 023 8059 2774
--
Stephen Harris
MALIBU Technical Officer & JoDI Webmaster
IAM Research Group
University of Southampton, UK
07970 557047
swh_AT_ecs.soton.ac.uk 023 8059 2774
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