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Fwd: Re: How can an LV2 plugin UI get the value of a control port from the plugin?

by Philippe Coatmeur

-------- Forwarded Message -------- Subject: Re: [LAD] How can an LV2 plugin UI get the value of a control port from the plugin? Date: Mon, 20 Oct 2014 01:27:10 +0100 From: Philippe Coatmeur <philcm(a)gnu.org> Organisation: GNU To: Harry van Haaren <harryhaaren(a)gmail.com> On 17/10/14 15:56, Harry van Haaren wrote: > On Fri, Oct 17, 2014 at 1:30 PM, Phil CM <philcm(a)gnu.org > <mailto:philcm@gnu.org>> wrote: > > Also each time the UI is opened, the widgets are reset at maximum > (not the values). > > Hi Phil, > > Glad to see you're excited and working hard on learning LV2! Checkout > the example plugins: they show how things work. > > In the UI, there is a port_event() function. It tells the UI what > port changed, and what its current value is. Use this to do > widget->setValue( newValue ); and you're done ;) For this I had to write my own int setValue(int value) { // this->scrollvalue(value); cout << "Called with value " << value << endl; } And it does get called by port_event() now * what do I put in this setValue() in order to /actually//update/ the widget value? There is a int scrollvalue(int pos,int size,int first,int total); in Fl_Slider.H but can't call it from the class, witch is not explicitely extending Fl_Slider <https://bitbucket.org/xaccrocheur/kis/src/8c3a85a9899f117d2fa273b6c7948402d…> from what I can see... Is it? Thanks everybody --Phil PS - Apparently Sorcer is using AvTK on top of FLTK, I was under the impression that Sorcer's UI was using NTK, am I mistaking? > > Eg (from OpenAV's ArtyFX, Bitta plugin) > https://github.com/harryhaaren/openAV-ArtyFX/blob/master/bitta/gui/ui.cxx#L… > > How can I /get/ the control ports values from the UI perspective? > > In answer to your Q, how to "get", you don't: you're told when there's > a new value. > > HTH, Cheers, -Harry > > -- > > http://www.openavproductions.com -- Philippe "xaccrocheur" Coatmeur http://bitbucket.org/xaccrocheur /https://github.com/xaccrocheur http://opensimo.org/play/

9 years, 11 months

jack midi python

by Egor Sanin

Hi folks, I'm trying to write a small utility in python that will help me redirect and route midi and osc to various software through jack. I'm finding that mididings, which I am a big fan of, doesn't quite fit for this particular task, so I started to look for other midi manipulation modules. Though there seems to be a dizzying array of modules that are designed for handling various midi tasks from python, I have settled on the two separate rtmidi ports: python-rtmidi (http://trac.chrisarndt.de/code/wiki/python-rtmidi) and rtmidi-python (https://github.com/superquadratic/rtmidi-python). My question is for those that have used either or both modules for their software: Can you recommend one over the other, and for what reasons? So far in my experimentation I've had trouble running rtmidi-python in a Python3 environment. NOTE: As these kinds of threads tend to digress here quite frequently, I'd like to emphasize that I'm not interested in whether python is the right language for this kind of thing, or whether midi on linux is bad/good, etc. -- I really don't care. I'm just interested in whether anyone has used the abovementioned modules and if they have pros/cons for one or the other. Many thanks.

9 years, 11 months

Advanced Gtk+ Sequencer 0.4.2

by Joël Krähemann

Advanced Gtk+ Sequencer 0.4.2 is out Check download at: http://sourceforge.net/projects/ags/files/ags-0_4_2.tar.bz2/download or API Reference by issuing: http://ags.sourceforge.net/api/ags/index.html Advanced GTK+ Sequencer is intended to use for music composition. Use its piano roll, synth, matrix editor, drum machine, soundfont2 player, mixer or the output panel.

9 years, 11 months

How can an LV2 plugin UI get the value of a control port from the plugin?

by Phil CM

When I turn the controls in my UI, the controls move in the hosts generic UI ; But when I turn the controls in the hosts generic UI, nothing moves in the UI. Also each time the UI is opened, the widgets are reset at maximum (not the values). How can I /get/ the control ports values from the UI perspective? --Phil

9 years, 11 months

[ANN] QjackCtl 0.3.12 released, feat. JACK Pretty-names aliasing

by Rui Nuno Capela

Again, a classic needs no introduction... QjackCtl 0.3.12 is now released! Change-log: - JACK client/port pretty-name (metadata) support is being introduced and seamlessly integrated with old Connections client/port aliases editing (rename) (refactored from an original patch by Paul Davis, thanks). (EXPERIMENTAL) - Application close confirm warning is now raising the main window as visible and active for due top level display, especially applicable when minimized to the system tray. - Messages standard output capture has been slightly improved as for non-blocking i/o, whenever available. - Translations install directory change. - Allow the build system to include an user specified LDFLAGS. - Missing input/output-latency parameter settings now settled for the D-BUS controlled JACK server and firewire back-end driver. Website: http://qjackctl.sourceforge.net Project page: http://sourceforge.net/projects/qjackctl Downloads: - source tarball: http://downloads.sourceforge.net/qjackctl/qjackctl-0.3.12.tar.gz - source package (openSUSE 13.1): http://downloads.sourceforge.net/qjackctl/qjackctl-0.3.12-21.rncbc.suse131.… - binary packages (openSUSE 13.1): http://downloads.sourceforge.net/qjackctl/qjackctl-0.3.12-21.rncbc.suse131.… http://downloads.sourceforge.net/qjackctl/qjackctl-0.3.12-21.rncbc.suse131.… Weblog (upstream support): http://www.rncbc.org License: QjackCtl is free, open-source software, distributed under the terms of the GNU General Public License (GPL) version 2 or later. See also: http://www.rncbc.org/drupal/node/826 Enjoy && Have fun! -- rncbc aka Rui Nuno Capela rncbc(a)rncbc.org

9 years, 11 months

Re: [LAD] How can an LV2 plugin UI get the value of a control port from the plugin?

by Philippe Coatmeur

On 17/10/14 15:56, Harry van Haaren wrote: > On Fri, Oct 17, 2014 at 1:30 PM, Phil CM <philcm(a)gnu.org > <mailto:philcm@gnu.org>> wrote: > > Also each time the UI is opened, the widgets are reset at maximum > (not the values). > > Hi Phil, > > Glad to see you're excited and working hard on learning LV2! Checkout > the example plugins: they show how things work. > > In the UI, there is a port_event() function. It tells the UI what > port changed, and what its current value is. Use this to do > widget->setValue( newValue ); and you're done ;) No matter what I try, I always end up with a error: ‘class Widget’ has no member named ‘setValue’. But I declare Widget quite exactly how you do BittaWidget, I require the same files, I don't know *where is your setValue member declared*..? Also, in your example you are really doing self->widget->graph->value(value); (But I dont seem to have a "value" method either). -Phil > > Eg (from OpenAV's ArtyFX, Bitta plugin) > https://github.com/harryhaaren/openAV-ArtyFX/blob/master/bitta/gui/ui.cxx#L… > > How can I /get/ the control ports values from the UI perspective? > > In answer to your Q, how to "get", you don't: you're told when there's > a new value. > > HTH, Cheers, -Harry > > -- > > http://www.openavproductions.com > > > _______________________________________________ > Linux-audio-dev mailing list > Linux-audio-dev(a)lists.linuxaudio.org > http://lists.linuxaudio.org/listinfo/linux-audio-dev -- Philippe "xaccrocheur" Coatmeur http://bitbucket.org/xaccrocheur /https://github.com/xaccrocheur http://opensimo.org/play/

9 years, 11 months

Fwd: Re: How can a LV2 plugin know on what host's MIDI Channel it's on?

by Phil CM

-------- Forwarded Message -------- Subject: Re: [LAD] How can a LV2 plugin know on what host's MIDI Channel it's on? Date: Thu, 16 Oct 2014 13:16:38 -0400 From: Paul Davis <paul(a)linuxaudiosystems.com> To: Phil CM <philcm(a)gnu.org> On Thu, Oct 16, 2014 at 12:59 PM, Phil CM <philcm(a)gnu.org <mailto:philcm@gnu.org>> wrote: On 16/10/14 17:15, Paul Davis wrote: > > > On Thu, Oct 16, 2014 at 11:42 AM, Phil CM <philcm(a)gnu.org > <mailto:philcm@gnu.org>> wrote: > > Is there a way to retrieve this info (and others, ideally) > from the host, thus removing the need for a "midi channel" > control port? > > > I think you're confused. The host doesn't put a plugin on a MIDI > channel. It delivers MIDI events to the plugin which might be on > any channel. But in Qtractor I do have a choice of what MIDI channel (or any/omni, for that matter) I'm sending signal to on that particular track... So, no? No way for the plugin to retrieve any info from the host (I mean specific info, not just instantiated, port enum et al) I guess it makes sense since it would introduce a breaking point. Sorry, I don't really speak english, I'm just persuaded I do. That is a host-specific issue. The part of the LV2 specification and the existing extensions don't describe that functionality. As far as the plugin is concerned, it just gets MIDI events. If the host is filtering some of them, the plugin has no way to determine this programmatically.

9 years, 11 months

Alsa and multiple bluetooth devices

by Andres Cabrera

Hi, I'm wondering if Alsa and bluetooth on Linux support connecting simultaneously to multiple bluetooth devices. I don't want to send the same output to the different bluetooth devices, I rather want a wireless multichannel system (but no need for sample accurate sync). Has anyone ever tried this or had any experiences to share? Thanks! Andrés

9 years, 11 months

suil error: Unable to open UI library

by Phil CM

Hello LADs I'm trying to make a GUI for a LV2 synth based on so-404. In fact, I'm trying to learn C / C++. I got everything to build OK, but I'm stuck on a hard to read execution error ; when I load the plugin in jalv, it loads it OK, but fails to load the UI and says : suil error: Unable to open UI library /usr/local/lib/lv2/kis.lv2/kis_gui.so (/usr/local/lib/lv2/kis.lv2/kis_gui.so: undefined symbol: _Z17instantiateSO_404PK15_LV2_DescriptordPKcPKPK12_LV2_Feature) (The architecture is based on https://github.com/harryhaaren/lv2/tree/master/plugins/eg-sinsynth.lv2 in fact it is exactly the same : synth.c/h, synth_gui.cpp, widget.cpp/h, built as synth.so synth_gui.so synth.ttl and manifest.ttl using waf). I must say I'm still to fully understand the concept of descriptors... Can somebody see what I'm doing wrong? Thanks --Philippe "xaccrocheur" Coatmeur

9 years, 11 months

Re: [LAD] suil error: Unable to open UI library

by Phil CM

I'm almost there: ⚡ jalv.gtk https://bitbucket.org/xaccrocheur/kis Plugin: https://bitbucket.org/xaccrocheur/kis UI: https://bitbucket.org/xaccrocheur/kis#gui UI Type: http://lv2plug.in/ns/extensions/ui#X11UI JACK Name: Kis Block length: 512 frames MIDI buffers: 32768 bytes Comm buffers: 524288 bytes Update rate: 25.0 Hz SO-404 v.1.2 by 50m30n3 2009-2011 controlmode = 1.000000 volume = 50.000000 cutoff = 50.000000 resonance = 100.000000 envelope = 80.000000 portamento = 64.000000 release = 100.000000 channel = 1.000000 frequency = 440.000000 suil error: Failed to find descriptor for <https://bitbucket.org/xaccrocheur/kis#gui> in /usr/local/lib/lv2/kis.lv2/kis_gui.so Please, give me a pointer to a basic implementation of that descriptor thing, somebody, please end my misery. --Phil On 15/10/14 20:17, Paul Davis wrote: > > > On Wed, Oct 15, 2014 at 2:24 PM, Phil CM <philcm(a)gnu.org > <mailto:philcm@gnu.org>> wrote: > > Hello LADs > > I'm trying to make a GUI for a LV2 synth based on so-404. In fact, > I'm trying to learn C / C++. > > I got everything to build OK, but I'm stuck on a hard to read > execution error ; when I load the plugin in jalv, it loads it OK, > but fails to load the UI and says : > > suil error: Unable to open UI library > /usr/local/lib/lv2/kis.lv2/kis_gui.so > (/usr/local/lib/lv2/kis.lv2/kis_gui.so: undefined symbol: > _Z17instantiateSO_404PK15_LV2_DescriptordPKcPKPK12_LV2_Feature) > > > > % echo _Z17instantiateSO_404PK15_LV2_DescriptordPKcPKPK12_LV2_Feature > | c++filt > instantiateSO_404(_LV2_Descriptor const*, double, char const*, > _LV2_Feature const* const*) > % > > your plugin is missing a symbol (instantiateSO_404(...)), apparently. > > > > _______________________________________________ > Linux-audio-dev mailing list > Linux-audio-dev(a)lists.linuxaudio.org > http://lists.linuxaudio.org/listinfo/linux-audio-dev

9 years, 11 months

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Linux-audio-dev