#include <string.h> // strncpy#include <limits.h> // PATH_MAX#include <aubio.h>#include "utils_tests.h" int main (int argc, char **argv){  sint_t err = 0;   if (argc < 3) {    PRINT_ERR("not enough arguments, running tests\n");    err = run_on_default_source_and_sink(main);    PRINT_MSG("usage: %s <input_path> <output_path> <sample_path> [samplerate]\n", argv[0]);    return err;  }   uint_t samplerate = 0; // default is the samplerate of input_path  uint_t hop_size = 256;  uint_t n_frames = 0, read = 0;   char_t *source_path = argv[1];  char_t *sink_path = argv[2];  char_t sample_path[PATH_MAX];  if ( argc >= 4 ) {    strncpy(sample_path, argv[3], PATH_MAX - 1);  } else {    // use input_path as sample    strncpy(sample_path, source_path, PATH_MAX - 1);  }  sample_path[PATH_MAX - 1] = '\0';  if ( argc >= 5 ) samplerate = atoi(argv[4]);   fvec_t *vec = new_fvec(hop_size);  aubio_source_t *source = new_aubio_source(source_path, samplerate, hop_size);  if (samplerate == 0 ) samplerate = aubio_source_get_samplerate(source);  aubio_sink_t *sink = new_aubio_sink(sink_path, samplerate);   aubio_sampler_t * sampler = new_aubio_sampler (samplerate, hop_size);   aubio_sampler_load (sampler, sample_path);   do {    aubio_source_do(source, vec, &read);    if (n_frames / hop_size == 10) {      aubio_sampler_play ( sampler );    }    if (n_frames / hop_size == 40) {      aubio_sampler_play ( sampler );    }    if (n_frames / hop_size == 70) {      aubio_sampler_play ( sampler );    }    if (n_frames > 10.0 * samplerate) {      aubio_sampler_stop ( sampler );    }    aubio_sampler_do (sampler, vec, vec);    aubio_sink_do(sink, vec, read);    n_frames += read;  } while ( read == hop_size );   del_aubio_sampler(sampler);  del_aubio_source(source);  del_aubio_sink(sink);  del_fvec(vec);  aubio_cleanup();   return 0;}