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