SNDRV_PCM_FORMAT_  137 include/sound/pcm.h #define _SNDRV_PCM_FMTBIT(fmt)		(1ULL << (__force int)SNDRV_PCM_FORMAT_##fmt)
SNDRV_PCM_FORMAT_  164 sound/core/pcm.c #define FORMAT(v) [SNDRV_PCM_FORMAT_##v] = #v