[LAD] Jack buffer management for block convolution

Hi, I have written a FFTW based block convolution jack client, but I am having difficulty processing the last jackframes%L samples of the jack buffer. I have read that it might be an idea to collect the samples into a second buffer and process them independently of the jack process callback, but I have no clue how to implement that. Any suggestions would be appreciated. I want to use the Parks-McClellin algorithm to generate some FIR filter coefficents with some user configurable parameters and have it process the filters using block convolution. Possibly as an addon for calf? So far my jack client works, and the block convolution overlap-add algorithm works as per Oppenheim and Schafer, but the last few samples of each jack buffer are zeroes. It would be nice to be able to have FIR filters longer than the size of the jack buffer too. Any ideas? --- Damien Zammit