72 lines
1.8 KiB
C
72 lines
1.8 KiB
C
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#ifndef __USBMIXER_H
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#define __USBMIXER_H
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struct usb_mixer_interface {
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struct snd_usb_audio *chip;
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struct usb_host_interface *hostif;
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struct list_head list;
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unsigned int ignore_ctl_error;
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struct urb *urb;
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/* array[MAX_ID_ELEMS], indexed by unit id */
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struct usb_mixer_elem_info **id_elems;
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/* the usb audio specification version this interface complies to */
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int protocol;
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/* Sound Blaster remote control stuff */
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const struct rc_config *rc_cfg;
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u32 rc_code;
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wait_queue_head_t rc_waitq;
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struct urb *rc_urb;
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struct usb_ctrlrequest *rc_setup_packet;
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u8 rc_buffer[6];
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u8 audigy2nx_leds[3];
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u8 xonar_u1_status;
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};
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#define MAX_CHANNELS 16 /* max logical channels */
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enum {
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USB_MIXER_BOOLEAN,
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USB_MIXER_INV_BOOLEAN,
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USB_MIXER_S8,
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USB_MIXER_U8,
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USB_MIXER_S16,
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USB_MIXER_U16,
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};
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struct usb_mixer_elem_info {
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struct usb_mixer_interface *mixer;
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struct usb_mixer_elem_info *next_id_elem; /* list of controls with same id */
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struct snd_ctl_elem_id *elem_id;
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unsigned int id;
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unsigned int control; /* CS or ICN (high byte) */
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unsigned int cmask; /* channel mask bitmap: 0 = master */
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unsigned int ch_readonly;
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unsigned int master_readonly;
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int channels;
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int val_type;
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int min, max, res;
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int dBmin, dBmax;
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int cached;
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int cache_val[MAX_CHANNELS];
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u8 initialized;
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};
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int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif,
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int ignore_error);
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void snd_usb_mixer_disconnect(struct list_head *p);
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void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer, int unitid);
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int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,
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int request, int validx, int value_set);
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void snd_usb_mixer_inactivate(struct usb_mixer_interface *mixer);
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int snd_usb_mixer_activate(struct usb_mixer_interface *mixer);
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int snd_usb_mixer_add_control(struct usb_mixer_interface *mixer,
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struct snd_kcontrol *kctl);
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#endif /* __USBMIXER_H */
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