ycollet / vopa

Volume Panning Midi CC controlable LV2 plugin

vopa

Two plugins are provided:

• VoPaSt - a stereo volume and panning plugin controlled via MIDI CC 7 and 10
• VoPaMo - a mono volume plugin controlled via MIDI CC

To build this plugin, you will need lv2-devel.

$ make 
$ sudo make install

You can specify install PATH via make:

$ sudo make INSTALLDIR=/usr/lib64/lv2 install

The DESTDIR variable can be used for packaging.

vopa's Issues

had to add -std=c99 to makefile to build

build fails after cloning from git

~/build/vopa $ make
gcc -Wall -O3 -ffast-math -lm pkg-config --cflags --libs lv2core -fPIC -c vopast.c -o vopast.o
In file included from vopast.h:33:0,
from vopast.c:22:
/usr/lib/lv2/atom.lv2/util.h: In function ‘lv2_atom_object_query’:
/usr/lib/lv2/atom.lv2/util.h:336:2: error: ‘for’ loop initial declarations are only allowed in C99 mode
for (LV2_Atom_Object_Query* q = query; q->key; ++q) {
^
/usr/lib/lv2/atom.lv2/util.h:336:2: note: use option -std=c99 or -std=gnu99 to compile your code
/usr/lib/lv2/atom.lv2/util.h:340:2: error: ‘for’ loop initial declarations are only allowed in C99 mode
LV2_ATOM_OBJECT_FOREACH(object, prop) {
... etc ...
^
make: *** [vopast.o] Fout 1

when adding -std-c99 to CFLAGS += in the Makefile it build
CFLAGS += -Wall -O3 -ffast-math -lm pkg-config --cflags --libs lv2core -fPIC -std=c99

now lets see if it actually works 😉

decrease in volume when plugin is inserted

When I add the plugin in Qtractor the volume lowers (not touching the faders).
It's about 3 db lower

metadata does not validate

This plugin's metadata does not validate.

error: Object not in property range:
       https://github.com/ycollet/vopa:VoPaMo
       http://lv2plug.in/ns/lv2core#optionalFeature
       http://lv2plug.in/ns/lv2core#hardRtCapable
note: Range is <http://lv2plug.in/ns/lv2core#Feature>
error: Object not in property range:
       https://github.com/ycollet/vopa:VoPaMo
       http://lv2plug.in/ns/lv2core#project
       http://lv2plug.in/ns/lv2
note: Range is <http://usefulinc.com/ns/doap#Project>
error: Object not in property range:
       https://github.com/ycollet/vopa:VoPaSt
       http://lv2plug.in/ns/lv2core#optionalFeature
       http://lv2plug.in/ns/lv2core#hardRtCapable
note: Range is <http://lv2plug.in/ns/lv2core#Feature>
error: Object not in property range:
       https://github.com/ycollet/vopa:VoPaSt
       http://lv2plug.in/ns/lv2core#project
       http://lv2plug.in/ns/lv2
note: Range is <http://usefulinc.com/ns/doap#Project>
Found 4 errors among 35 files (checked 1460 restrictions)

e.g. you want to use http://lv2plug.in/ns/lv2core/#hardRTCapable and define your own doap:project.

here's how to validate plugins prior to release:
http://lv2plug.in/pages/validating-lv2-data.html