First post here - so a big salute to the team
I'm trying hard to get into LV2 development. I've got the plugins by themselves working fine, but my next mission - making a gui for it - is causing me a lot of hassle. I'd really appreciate some help if anyone is willing to listen.
I've done the following steps, using the lv2_ui.h header...
1) Created a struct type with pointers to gtk widgets, floats for the ports, and slots to store write_function and the controller pointers.
2) Created a descriptor linking all the required functions.
3) Written the lv2ui_descriptor function
4) Written an instantiate function which: mallocs an instance of the ui struct; creates the widgets which are part of this struct; records the pointers of write_function and controller into the struct; returns the pointer to this struct.
I've also written the gui so that signals from the sliders are caught and use the write_function to update control port data.
Everything I've done seems very logical. I compile it and it loads fine, but as soon as I request the gui from a host, it crashes with a 'segmentation fault'.
However, if I choose to return NULL to the instantiate function, the gui pops up fine - BUT again crashes with the same error if I move any of the sliders which trigger the write_function.
Does anyone have any idea what it might be trying to access to give me this fault?
Or is this likely to be a newbie error in my code.
Thanks for reading
Matthew
