-extern int snd_pcm_hw_param_mask(snd_pcm_substream_t *pcm, snd_pcm_hw_params_t *params,
- snd_pcm_hw_param_t var, const snd_mask_t *val);
-extern unsigned int snd_pcm_hw_param_value_min(const snd_pcm_hw_params_t *params,
+extern int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm, struct snd_pcm_hw_params *params,
+ snd_pcm_hw_param_t var, const struct snd_mask *val);
+extern unsigned int snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params,