snd_pcm_sw_params_get_start_threshold(swparams, &f);
info("sw start_threshold=%lu", (unsigned long)f);
snd_pcm_sw_params_get_stop_threshold(swparams, &f);
info("sw stop_threshold=%lu", (unsigned long)f);
snd_pcm_sw_params_get_start_threshold(swparams, &f);
info("sw start_threshold=%lu", (unsigned long)f);
snd_pcm_sw_params_get_stop_threshold(swparams, &f);
info("sw stop_threshold=%lu", (unsigned long)f);