4 struct usb_mixer_interface {
5 struct snd_usb_audio *chip;
7 unsigned int ignore_ctl_error;
9 /* array[MAX_ID_ELEMS], indexed by unit id */
10 struct usb_mixer_elem_info **id_elems;
12 /* the usb audio specification version this interface complies to */
15 /* Sound Blaster remote control stuff */
16 const struct rc_config *rc_cfg;
18 wait_queue_head_t rc_waitq;
20 struct usb_ctrlrequest *rc_setup_packet;
27 #define MAX_CHANNELS 10 /* max logical channels */
29 struct usb_mixer_elem_info {
30 struct usb_mixer_interface *mixer;
31 struct usb_mixer_elem_info *next_id_elem; /* list of controls with same id */
32 struct snd_ctl_elem_id *elem_id;
34 unsigned int control; /* CS or ICN (high byte) */
35 unsigned int cmask; /* channel mask bitmap: 0 = master */
36 unsigned int ch_readonly;
37 unsigned int master_readonly;
43 int cache_val[MAX_CHANNELS];
47 int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif,
49 void snd_usb_mixer_disconnect(struct list_head *p);
51 void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer, int unitid);
53 int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,
54 int request, int validx, int value_set);
56 #endif /* __USBMIXER_H */