snd_pcm_sw_params_t *swparams;
snd_pcm_uframes_t start_threshold, stop_threshold;
snd_pcm_uframes_t buffer_size, period_size;
snd_pcm_sw_params_t *swparams;
snd_pcm_uframes_t start_threshold, stop_threshold;
snd_pcm_uframes_t buffer_size, period_size;