-int snd_pcm_hw_param_near(struct snd_pcm_substream *substream,
- struct snd_pcm_hw_params *params,
- snd_pcm_hw_param_t var,
- unsigned int val, int *dir);
-int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm,
- struct snd_pcm_hw_params *params,
- snd_pcm_hw_param_t var,
- unsigned int val, int dir);