[BUG] LV2 version of BYOD can't be instantiated by Ardour6.9 about byod HOT 7 OPEN

Thanks for reporting this!

A few weeks ago, I updated the plugin to build from JUCE version 7 which has built-in LV2 support (previously the plugin was using a fork of JUCE). It seems that in the JUCE LV2 wrapper, there's some interop issue with Ardour.

Since we're still a ways away from the next official release of BYOD, I decided to upgrade to JUCE7 (since there were other features/fixes I wanted to use) and hope that the relevant parties can figure out a solution before then. In the meantime, if you or anyone else needs to be able to run the plugin in Ardour as an LV2, I would suggest going back to the last stable release (v1.0.1).

from byod.

I've compiled Ardour7 pre-release version and in this version plugin can be successfully instantiated. File explorer also works. Now I'm about to compile Ardour6.9 with debug symbols to find out what's wrong with BYOD or with Ardour

from byod.

I have debugged BYOD on Ardour6.9. Fail happens because LV2 descriptor returns NULL in instanitate method here. Ardour compiled with 0.24.12 version of lilv library.

The arguments passing in instanitate method are:

76            result->lv2_handle     = ld->instantiate(
(gdb) print ld->URI
$24 = 0x7ffefb6d8998 "https://github.com/Chowdhury-DSP/BYOD"
(gdb) print sample_rate
$25 = 48000
(gdb) print bundle_path
$26 = 0x1aa0130 "/usr/local/lib64/lv2/BYOD.lv2/"
(gdb) print features
$27 = <optimized out>

For unknown reasons I can't step in instantiate method and find out what's wrong

from byod.

If I instantiate ardour's stock compressor I can step in instantiate function. Maybe I need to compile BYOD with some debugging options.

Thread 1 "ArdourGUI" hit Breakpoint 8, lilv_plugin_instantiate (plugin=0x23c53e0, sample_rate=48000, features=<optimized out>) at ../src/instance.c:75
75            result->lv2_descriptor = ld;
(gdb) print ld->URI
$28 = 0x7fffe00080f3 "urn:ardour:a-comp#stereo"
(gdb) step
76            result->lv2_handle     = ld->instantiate(
(gdb) step
instantiate (descriptor=0x7fffe0009d80 <descriptor_stereo>, rate=48000, bundle_path=0x4784eb0 "/home/person/Documents/building/ardour/ardour/build/libs/LV2/a-comp.lv2/", features=0x175f300) at ../libs/plugins/a-comp.lv2/a-comp.c:132
132     {
(gdb) next
133             AComp* acomp = (AComp*)calloc(1, sizeof(AComp));

from byod.

Yeah, I would guess that some of the methods in both the plugin and host are being optimized away. If you're able to do a debug build for both that would probably make it a bit easier to step through everything.

That's great news that everything is working in Ardour version 7!

from byod.

With the nightly build I managed to at least use the lv2 version with Ardour 7 (I know, not 6.9).

from byod.

@doojonio try to apply this patch to Ardour 6.9 https://build.opensuse.org/package/view_file/multimedia:proaudio/ardour/LV2-announce-bufz-boundedBlockLength-feature.patch?expand=1

from byod.