release/src-rt-6.x.4708/linux/linux-2.6.36/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         struct list_head list;
   7         unsigned int ignore_ctl_error;
   8         struct urb *urb;
   9         /* array[MAX_ID_ELEMS], indexed by unit id */
  10         struct usb_mixer_elem_info **id_elems;
  11
  12         /* the usb audio specification version this interface complies to */
  13         int protocol;
  14
  15         /* Sound Blaster remote control stuff */
  16         const struct rc_config *rc_cfg;
  17         u32 rc_code;
  18         wait_queue_head_t rc_waitq;
  19         struct urb *rc_urb;
  20         struct usb_ctrlrequest *rc_setup_packet;
  21         u8 rc_buffer[6];
  22
  23         u8 audigy2nx_leds[3];
  24         u8 xonar_u1_status;
  25 };
  26
  27 #define MAX_CHANNELS    10      /* max logical channels */
  28
  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;
  33         unsigned int 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;
  38         int channels;
  39         int val_type;
  40         int min, max, res;
  41         int dBmin, dBmax;
  42         int cached;
  43         int cache_val[MAX_CHANNELS];
  44         u8 initialized;
  45 };
  46
  47 int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif,
  48                          int ignore_error);
  49 void snd_usb_mixer_disconnect(struct list_head *p);
  50
  51 void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer, int unitid);
  52
  53 int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,
  54                                 int request, int validx, int value_set);
  55
  56 #endif /* __USBMIXER_H */