ferryzhou

function [ao, bo, offset, y] = align(a, b)
% align two signals a and b
% ao and bo are aligned ones with same length
% y is the correlation xcorr(a, b)
% a_ind + offset -> b_ind
% if offset >= 0, cut a, else cut b

an = length(a); bn = length(b);

N = max(an, bn);

ferryzhou

function mkdir_if_not_exist(dirpath)
    if dirpath(end) ~= '/', dirpath = [dirpath '/']; end
    if (exist(dirpath, 'dir') == 0), mkdir(dirpath); end
end

ferryzhou

function segs = get_segments(o)

segs = [];

if o(1), st = 1; state = 1;
else state = 2; end

for i = 2 : length(o)
    if o(i)
        if state == 2

ferryzhou

#include <stdio.h>
#include <stdlib.h>
#include <alsa/asoundlib.h>
      
#define BUF_BYTES 128

int main (int argc, char *argv[]) {
    int err;
    unsigned char buf[BUF_BYTES];