+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);