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 16 /* max logical channels */
31 USB_MIXER_INV_BOOLEAN,
38 struct usb_mixer_elem_info {
39 struct usb_mixer_interface *mixer;
40 struct usb_mixer_elem_info *next_id_elem; /* list of controls with same id */
41 struct snd_ctl_elem_id *elem_id;
43 unsigned int control; /* CS or ICN (high byte) */
44 unsigned int cmask; /* channel mask bitmap: 0 = master */
45 unsigned int ch_readonly;
46 unsigned int master_readonly;
52 int cache_val[MAX_CHANNELS];
56 int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif,
58 void snd_usb_mixer_disconnect(struct list_head *p);
60 void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer, int unitid);
62 int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,
63 int request, int validx, int value_set);
64 void snd_usb_mixer_inactivate(struct usb_mixer_interface *mixer);
65 int snd_usb_mixer_activate(struct usb_mixer_interface *mixer);
67 int snd_usb_mixer_add_control(struct usb_mixer_interface *mixer,
68 struct snd_kcontrol *kctl);
70 #endif /* __USBMIXER_H */