snd_pcm_hw_param_first (9) - Linux Man Pages

snd_pcm_hw_param_first: refine config space and return minimum value

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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