最終更新:2024-11-30 (土) 02:45:12 (8d)  

snd_pcm_hw_params_t
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PCM hardware configuration space container

https://www.alsa-project.org/alsa-doc/alsa-lib/group___p_c_m.html#ga65c737127994f0a980edad744e36dc40

snd_pcm_hw_params 

struct snd_pcm_hw_params {
	unsigned int flags;
	struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK -
			       SNDRV_PCM_HW_PARAM_FIRST_MASK + 1];
	struct snd_mask mres[5];	/* reserved masks */
	struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL -
				        SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1];
	struct snd_interval ires[9];	/* reserved intervals */
	unsigned int rmask;		/* W: requested masks */
	unsigned int cmask;		/* R: changed masks */
	unsigned int info;		/* R: Info flags for returned setup */
	unsigned int msbits;		/* R: used most significant bits (in sample bit-width) */
	unsigned int rate_num;		/* R: rate numerator */
	unsigned int rate_den;		/* R: rate denominator */
	snd_pcm_uframes_t fifo_size;	/* R: chip FIFO size in frames */
	unsigned char sync[16];         /* R: synchronization ID (perfect sync - one clock source) */
	unsigned char reserved[48];	/* reserved for future */
};



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