snd_pcm_hw_param_first
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Name

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.

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