4 struct usb_mixer_interface {
5 struct snd_usb_audio *chip;
6 struct usb_host_interface *hostif;
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;
30 #define MAX_CHANNELS 16 /* max logical channels */
34 USB_MIXER_INV_BOOLEAN,
41 struct usb_mixer_elem_info {
42 struct usb_mixer_interface *mixer;
43 struct usb_mixer_elem_info *next_id_elem; /* list of controls with same id */
44 struct snd_ctl_elem_id *elem_id;
46 unsigned int control; /* CS or ICN (high byte) */
47 unsigned int cmask; /* channel mask bitmap: 0 = master */
48 unsigned int ch_readonly;
49 unsigned int master_readonly;
55 int cache_val[MAX_CHANNELS];
60 int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif,
62 void snd_usb_mixer_disconnect(struct list_head *p);
64 void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer, int unitid);
66 int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,
67 int request, int validx, int value_set);
68 void snd_usb_mixer_inactivate(struct usb_mixer_interface *mixer);
69 int snd_usb_mixer_activate(struct usb_mixer_interface *mixer);
71 int snd_usb_mixer_add_control(struct usb_mixer_interface *mixer,
72 struct snd_kcontrol *kctl);
74 #endif /* __USBMIXER_H */