(constant
 ;; typedef enum _snd_pcm_stream
 'SND_PCM_STREAM_PLAYBACK 0
 'SND_PCM_STREAM_CAPTURE  1
 ;; Non blocking mode (flag for open mode)
 'SND_PCM_NONBLOCK 0x00000001
 ;; Async notification
 'SND_PCM_ASYNC    0x00000002
 ;; enum _snd_pcm_format (some)
 'SND_PCM_FORMAT_S16_LE 2
 ;; enum _snd_pcm_access (some)
 'SND_PCM_ACCESS_RW_INTERLEAVED 3
 'SND_PCM_ACCESS_RW_NONINTERLEAVED 4
 )

(import LIB "snd_pcm_open" "int"
        "void*" ; snd_pcm_t **pcmp [output]
        "char*" ; const char *name
        "int"   ; snd_pcm_stream_t stream
        "int"   ; int mode
        )

(import LIB "snd_pcm_writei" "long" ; snd_pcm_uframes_t 
	"void*" ; snd_pcm_t *pcm
        "void*" ; const void *buffer
        "long"   ; snd_pcm_uframes_t size
        )

(import LIB "snd_pcm_prepare" "int" ; int
	"void*" ; snd_pcm_t *pcm
        )

(import LIB "snd_pcm_start" "int" ; int
	"void*" ; snd_pcm_t *pcm
        )

;;typedef struct _snd_pcm_hw_params snd_pcm_hw_params_t
#      "unsigned" ; 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 */
#      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 reserved[64];     /* reserved for future */

#(import LIB "snd_pcm_hw_params_current" "int"
#	"void*" ; snd_pcm_t *pcm
#        "void*" ; snd_pcm_hw_params_t *params
#        )

(import LIB "snd_pcm_state" "int" ; snd_pcm_state_t snd_pcm_state
	"void*" ; snd_pcm_t *pcm
        )

(import LIB "snd_pcm_start" "int" ; snd_pcm_state_t snd_pcm_start
	"void*" ; snd_pcm_t *pcm
        )

(import LIB "snd_pcm_wait" "int"
	"void*" ; snd_pcm_t *pcm
        "int"   ; int timeout 
        )

(import LIB "snd_pcm_set_params" "int"
        "void*" ; snd_pcm_t *pcm
        "int"   ; snd_pcm_format_t format
        "int"   ; snd_pcm_access_t access
        "unsigned int" ; unsigned int channels
        "unsigned int" ; unsigned int rate
        "int"   ;int soft_resample
        "unsigned int" ; unsigned int latency
        )

(import LIB "snd_pcm_drain" "int"
        "void*" ; snd_pcm_t *pcm
        )

(import LIB "snd_pcm_close" "int"
        "void*" ; snd_pcm_t *pcm
        )