Function

ALSARawmidiget_subdevice_id_list

Declaration [src]

gboolean
alsarawmidi_get_subdevice_id_list (
  guint card_id,
  guint device_id,
  ALSARawmidiStreamDirection direction,
  guint** entries,
  gsize* entry_count,
  GError** error
)

Description [src]

Get the list of numeric identifier for subdevices belongs to the numerical identifier of card, device, and the direction.

The call of function executes open(2), close(2), and ioctl(2) system call with SNDRV_CTL_IOCTL_RAWMIDI_INFO command for ALSA control character device.

Parameters

`card_id`	`guint`
	The numeric value for sound card to query.
`device_id`	`guint`
	The numeric value of rawmidi device to query.
`direction`	`ALSARawmidiStreamDirection`
	The direction of stream to query, one of `ALSARawmidiStreamDirection`.
`entries`	An array of `guint*`
	The list of numeric identifier of subdevice.
	The argument will be set by the function.
	The length of the array is specified in the `entry_count` argument.
	The called function takes ownership of the data, and is responsible for freeing it.
`entry_count`	`gsize*`
	The number of entries.
	The argument will be set by the function.
`error`	`GError **`
	The return location for a `GError*`, or `NULL`.

Return value

Returns:	`gboolean`
	`TRUE` when the overall operation finishes successfully, else `FALSE`.