-void _snd_pcm_hw_params_any(snd_pcm_hw_params_t *params);
-void _snd_pcm_hw_param_setempty(snd_pcm_hw_params_t *params, snd_pcm_hw_param_t var);
-int snd_pcm_hw_param_min(snd_pcm_substream_t *substream,
- snd_pcm_hw_params_t *params,
- snd_pcm_hw_param_t var,
- unsigned int val, int *dir);
-int snd_pcm_hw_param_max(snd_pcm_substream_t *substream,
- snd_pcm_hw_params_t *params,
- snd_pcm_hw_param_t var,
- unsigned int val, int *dir);
-int snd_pcm_hw_param_setinteger(snd_pcm_substream_t *substream,
- snd_pcm_hw_params_t *params,
- snd_pcm_hw_param_t var);
-int snd_pcm_hw_param_first(snd_pcm_substream_t *substream,
- snd_pcm_hw_params_t *params,
- snd_pcm_hw_param_t var, int *dir);
-int snd_pcm_hw_param_last(snd_pcm_substream_t *substream,
- snd_pcm_hw_params_t *params,
- snd_pcm_hw_param_t var, int *dir);
-int snd_pcm_hw_param_near(snd_pcm_substream_t *substream,
- snd_pcm_hw_params_t *params,
+void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params);
+void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var);
+int snd_pcm_hw_param_near(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,