[LV2] Request for info

Hanspeter Portner ventosus at airpost.net
Fri Mar 3 00:03:41 PST 2017

On 03.03.2017 08:10, Pavanashree K (RBEI/ECF3) wrote:
> Can you please tell me, what and all the sample formats supported in LV2?
> Like S16_LE, FLOAT64_LE etc.
> Or is it the void pointer ??

LV2 uses float32 for audio samples and controls.

As you seem to want to write an LV2 host, as it says on [1], have a look
at lv2apply [2] and Jalv [3], they are THE reference implementations of
an LV2 host. That should get you going.

[1] http://lv2plug.in/pages/developing.html
[2] http://git.drobilla.net/cgit.cgi/lilv.git/tree/utils/lv2apply.c
[3] http://drobilla.net/software/jalv

> -----Original Message-----
> From: Pavanashree K (RBEI/ECF3) 
> Sent: Friday, March 03, 2017 8:11 AM
> To: 'David Robillard' <d at drobilla.net>; devel at lists.lv2plug.in
> Subject: RE: [LV2] Request for info
> Thanks for the reply. :-) 
> So, the only means I can call lv2 plugins, is usin lilv library ??
> Or, can I call the instantiate -> run -> activate - >deactivate->cleanup calls is sufficient ??
> As, all the plugins follow the same procedure.

That's not enough. You need to discover number of audio/control ports
and required features/extensions first, e.g. with lilv library.

> Because, as of know, I am not writing the plugins. 
> My team is only interested in invoking it.

I'd propose to first write (or at least study the code of) a working
plugin to get to know LV2 before writing a host...

> Best regards
> Pavanashree K
> RBEI/ECF32  
> Tel. +91(80)6136-4446 
> -----Original Message-----
> From: Devel [mailto:devel-bounces at lists.lv2plug.in] On Behalf Of David Robillard
> Sent: Friday, March 03, 2017 12:03 AM
> To: devel at lists.lv2plug.in
> Subject: Re: [LV2] Request for info
> On Wed, 2017-03-01 at 07:11 +0000, Pavanashree K (RBEI/ECF3) wrote:
>> Dear Developer,
>> I am new to this lv2 plugin.
>> I was trying the ladspa in built available plugin in Ubuntu.
>> I was happy to use the plugins.
>> I got the info like, lv2 is the extended version of ladspa.
>> So can I call the lv2 plugins from ladspa alsa device
>> Please suggest.
> No, LV2 is not API compatible with LADSPA.

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