4 struct usb_mixer_interface {
5 struct snd_usb_audio *chip;
8 unsigned int ignore_ctl_error;
10 /* array[MAX_ID_ELEMS], indexed by unit id */
11 struct usb_mixer_elem_info **id_elems;
13 /* the usb audio specification version this interface complies to */
16 /* Sound Blaster remote control stuff */
17 const struct rc_config *rc_cfg;
19 wait_queue_head_t rc_waitq;
21 struct usb_ctrlrequest *rc_setup_packet;
28 #define MAX_CHANNELS 10 /* max logical channels */
30 struct usb_mixer_elem_info {
31 struct usb_mixer_interface *mixer;
32 struct usb_mixer_elem_info *next_id_elem; /* list of controls with same id */
33 struct snd_ctl_elem_id *elem_id;
35 unsigned int control; /* CS or ICN (high byte) */
36 unsigned int cmask; /* channel mask bitmap: 0 = master */
42 int cache_val[MAX_CHANNELS];
46 int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif,
48 void snd_usb_mixer_disconnect(struct list_head *p);
50 void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer, int unitid);
52 int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,
53 int request, int validx, int value_set);
55 #endif /* __USBMIXER_H */