Here is a list of all documented variables with links to the struct/union documentation for each field:

A

B

C

D

E

F

G

H

I

J

L

M

N

O

P

Q

R

S

T

U

V

W

- q -

• query_chmaps : snd_pcm_extplug_callback_t, snd_pcm_ioplug_callback_t
• queue : snd_seq_ev_queue_control_t, snd_seq_event_data_t, snd_seq_event_t, snd_seq_ump_event_t