sound/usb/mixer.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         /* the usb audio specification version this interface complies to */
  14         int protocol;
  15
  16         /* Sound Blaster remote control stuff */
  17         const struct rc_config *rc_cfg;
  18         u32 rc_code;
  19         wait_queue_head_t rc_waitq;
  20         struct urb *rc_urb;
  21         struct usb_ctrlrequest *rc_setup_packet;
  22         u8 rc_buffer[6];
  23
  24         u8 audigy2nx_leds[3];
  25         u8 xonar_u1_status;
  26 };
  27
  28 #define MAX_CHANNELS    10      /* max logical channels */
  29
  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;
  34         unsigned int id;
  35         unsigned int control;   /* CS or ICN (high byte) */
  36         unsigned int cmask; /* channel mask bitmap: 0 = master */
  37         int channels;
  38         int val_type;
  39         int min, max, res;
  40         int dBmin, dBmax;
  41         int cached;
  42         int cache_val[MAX_CHANNELS];
  43         u8 initialized;
  44 };
  45
  46 int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif,
  47                          int ignore_error);
  48 void snd_usb_mixer_disconnect(struct list_head *p);
  49
  50 void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer, int unitid);
  51
  52 int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,
  53                                 int request, int validx, int value_set);
  54
  55 #endif /* __USBMIXER_H */