I updated the stack generator routines in libpippi to support the new pulsar osc style. They just return normal lpbuffer_t buffers now, but also require pointers to two arrays which store the offsets and sizes of each table inside the buffer. Otherwise the interface is similar: the first param is the number of tables in the stack, then there are two new required params for the offsets and lengths for each table (it’s up to the caller to make sure they’re the right size) and finally a series of alternating constants for the wavetype, and the requested size. The special WT_USER and WIN_USER constants now also can be given a pointer to an lpbuffer_t instead of a size, and the table will be included in the stack along with any built-in tables.

So, for example to create a stack of tables to be used for windows that consists of a 4096 element hanning window, a 128 element sine window, an arbitrarily sized window buffer (maybe filled with a microfragment of a fish vocalization? or anything) and a 1024 element triangle window:

#define num_tables 4
size_t onsets[num_tables] = {};
size_t lengths[num_tables] = {};
lpbuffer_t * fish = LPSoundFile.read("fish.wav");
lpbuffer_t * tables = LPWindow.create_stack(num_tables, 
    onsets, lengths,
    WT_HANN, 4096,
    WT_SINE, 128,
    WT_USER, fish,
    WT_TRI, 1024
);