snd_pcm_hw_param_first (9) Linux Manual Page
snd_pcm_hw_param_first – refine config space and return minimum value
Synopsis
int snd_pcm_hw_param_first(struct snd_pcm_substream *pcm, struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var, int *dir);Arguments
pcm
-
- PCM instance
params
- the hw_params instance
var
- parameter to retrieve
dir
- pointer to the direction (-1,0,1) or NULL
Description
Inside configuration space defined by params remove from var all values > minimum. Reduce configuration space accordingly.
Return
The minimum, or a negative error code on failure.