sound/usb/usbmixer.h

   1 #ifndef __USBMIXER_H
   2 #define __USBMIXER_H
   3
   4 struct usb_mixer_interface {
   5         struct snd_usb_audio *chip;
   6         unsigned int ctrlif;
   7         struct list_head list;
   8         unsigned int ignore_ctl_error;
   9         struct urb *urb;
  10         /* array[MAX_ID_ELEMS], indexed by unit id */
  11         struct usb_mixer_elem_info **id_elems;
  12
  13         /* Sound Blaster remote control stuff */
  14         const struct rc_config *rc_cfg;
  15         u32 rc_code;
  16         wait_queue_head_t rc_waitq;
  17         struct urb *rc_urb;
  18         struct usb_ctrlrequest *rc_setup_packet;
  19         u8 rc_buffer[6];
  20
  21         u8 audigy2nx_leds[3];
  22         u8 xonar_u1_status;
  23 };
  24
  25 #define MAX_CHANNELS    10      /* max logical channels */
  26
  27 struct usb_mixer_elem_info {
  28         struct usb_mixer_interface *mixer;
  29         struct usb_mixer_elem_info *next_id_elem; /* list of controls with same id */
  30         struct snd_ctl_elem_id *elem_id;
  31         unsigned int id;
  32         unsigned int control;   /* CS or ICN (high byte) */
  33         unsigned int cmask; /* channel mask bitmap: 0 = master */
  34         int channels;
  35         int val_type;
  36         int min, max, res;
  37         int dBmin, dBmax;
  38         int cached;
  39         int cache_val[MAX_CHANNELS];
  40         u8 initialized;
  41 };
  42
  43 int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif,
  44                          int ignore_error);
  45 void snd_usb_mixer_disconnect(struct list_head *p);
  46
  47 void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer, int unitid);
  48
  49 int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,
  50                                 int request, int validx, int value_set);
  51
  52 #endif /* __USBMIXER_H */