snd_pcm_hw_constraint_ratdens —
int snd_pcm_hw_constraint_ratdens
(struct snd_pcm_runtime * runtime, unsigned int cond, snd_pcm_hw_param_t var, struct snd_pcm_hw_constraint_ratdens * r);
PCM runtime instance
condition bits
hw_params variable to apply the ratdens constraint
struct snd_ratdens constriants