golden hour

/usr/include/linux

File/Folder	Size	Actions
a.out.h	6.73 KB
acct.h	3.82 KB
acrn.h	16.29 KB
adb.h	1.11 KB
adfs_fs.h	993 B
affs_hardblocks.h	1.54 KB
agpgart.h	3.85 KB
aio_abi.h	3.32 KB
am437x-vpfe.h	3.59 KB
android	-
apm_bios.h	3.6 KB
arcfb.h	213 B
arm_sdei.h	2.69 KB
aspeed-lpc-ctrl.h	1.74 KB
aspeed-p2a-ctrl.h	1.86 KB
atalk.h	1023 B
atm.h	7.7 KB
atm_eni.h	648 B
atm_he.h	406 B
atm_idt77105.h	955 B
atm_nicstar.h	1.25 KB
atm_tcp.h	1.58 KB
atm_zatm.h	1.5 KB
atmapi.h	952 B
atmarp.h	1.27 KB
atmbr2684.h	3.19 KB
atmclip.h	576 B
atmdev.h	7.5 KB
atmioc.h	1.61 KB
atmlec.h	2.33 KB
atmmpc.h	4.13 KB
atmppp.h	639 B
atmsap.h	4.85 KB
atmsvc.h	1.81 KB
audit.h	21.06 KB
auto_dev-ioctl.h	4.87 KB
auto_fs.h	6.28 KB
auto_fs4.h	451 B
auxvec.h	1.56 KB
ax25.h	2.76 KB
batadv_packet.h	19.87 KB
batman_adv.h	16.49 KB
baycom.h	883 B
bcm933xx_hcs.h	419 B
bfs_fs.h	1.86 KB
binfmts.h	776 B
bits.h	447 B
blkpg.h	904 B
blktrace_api.h	4.59 KB
blkzoned.h	6.34 KB
bpf.h	272.11 KB
bpf_common.h	1.33 KB
bpf_perf_event.h	529 B
bpfilter.h	465 B
bpqether.h	981 B
bsg.h	2.44 KB
bt-bmc.h	572 B
btf.h	5.46 KB
btrfs.h	29.85 KB
btrfs_tree.h	25.22 KB
byteorder	-
cachefiles.h	1.61 KB
caif	-
can	-
can.h	11.03 KB
capability.h	13.17 KB
capi.h	3.05 KB
cciss_defs.h	3.2 KB
cciss_ioctl.h	2.7 KB
ccs.h	767 B
cdrom.h	28.87 KB
cec-funcs.h	53.14 KB
cec.h	40.47 KB
cfm_bridge.h	1.42 KB
cgroupstats.h	2.17 KB
chio.h	5.16 KB
cifs	-
close_range.h	377 B
cm4000_cs.h	1.76 KB
cn_proc.h	4.05 KB
coda.h	17.79 KB
coff.h	12.25 KB
connector.h	2.2 KB
const.h	987 B
coresight-stm.h	747 B
cramfs_fs.h	3.47 KB
cryptouser.h	5.2 KB
cuda.h	905 B
cxl_mem.h	7.73 KB
cycx_cfm.h	2.92 KB
dcbnl.h	24.7 KB
dccp.h	6.29 KB
devlink.h	22.3 KB
dlm.h	2.49 KB
dlm_device.h	2.48 KB
dlm_netlink.h	1.13 KB
dlm_plock.h	894 B
dlmconstants.h	4.96 KB
dm-ioctl.h	11.48 KB
dm-log-userspace.h	14.83 KB
dma-buf.h	5.12 KB
dma-heap.h	1.36 KB
dn.h	4.53 KB
dns_resolver.h	3.86 KB
dpll.h	7.19 KB
dqblk_xfs.h	9.17 KB
dvb	-
edd.h	5.47 KB
efs_fs_sb.h	2.17 KB
elf-em.h	2.57 KB
elf-fdpic.h	1.1 KB
elf.h	14.69 KB
errno.h	23 B
errqueue.h	1.94 KB
erspan.h	1.03 KB
ethtool.h	100.09 KB
ethtool_netlink.h	29.87 KB
eventfd.h	264 B
eventpoll.h	2.84 KB
f2fs.h	3.22 KB
fadvise.h	842 B
falloc.h	3.5 KB
fanotify.h	6.64 KB
fb.h	16.09 KB
fcntl.h	4.22 KB
fd.h	11.83 KB
fdreg.h	5.24 KB
fib_rules.h	1.99 KB
fiemap.h	2.71 KB
filter.h	2.16 KB
firewire-cdev.h	43.2 KB
firewire-constants.h	3.16 KB
fou.h	819 B
fpga-dfl.h	8.52 KB
fs.h	12.88 KB
fscrypt.h	6.41 KB
fsi.h	2.2 KB
fsl_hypervisor.h	7.13 KB
fsl_mc.h	734 B
fsmap.h	4.29 KB
fsverity.h	3.11 KB
fuse.h	25.36 KB
futex.h	5.98 KB
gameport.h	897 B
gen_stats.h	1.49 KB
genetlink.h	2.19 KB
genwqe	-
gfs2_ondisk.h	14.43 KB
gpio.h	19.46 KB
gsmmux.h	4.4 KB
gtp.h	734 B
handshake.h	1.61 KB
hash_info.h	971 B
hdlc	-
hdlc.h	637 B
hdlcdrv.h	2.84 KB
hdreg.h	22.17 KB
hid.h	2.04 KB
hiddev.h	6.2 KB
hidraw.h	1.95 KB
hpet.h	743 B
hsi	-
hsr_netlink.h	1.08 KB
hw_breakpoint.h	742 B
hyperv.h	10.89 KB
i2c-dev.h	1.83 KB
i2c.h	6.73 KB
i2o-dev.h	11.28 KB
i8k.h	1.49 KB
icmp.h	4.67 KB
icmpv6.h	4.2 KB
idxd.h	9.11 KB
if.h	10.67 KB
if_addr.h	1.84 KB
if_addrlabel.h	721 B
if_alg.h	1.53 KB
if_arcnet.h	3.63 KB
if_arp.h	6.41 KB
if_bonding.h	5.02 KB
if_bridge.h	20.18 KB
if_cablemodem.h	986 B
if_eql.h	1.32 KB
if_ether.h	8.21 KB
if_fc.h	1.7 KB
if_fddi.h	4.27 KB
if_hippi.h	4.14 KB
if_infiniband.h	1.22 KB
if_link.h	52.83 KB
if_ltalk.h	210 B
if_macsec.h	6.35 KB
if_packet.h	7.99 KB
if_phonet.h	424 B
if_plip.h	660 B
if_ppp.h	29 B
if_pppol2tp.h	3.23 KB
if_pppox.h	4.76 KB
if_slip.h	872 B
if_team.h	2.54 KB
if_tun.h	4 KB
if_tunnel.h	5.36 KB
if_vlan.h	1.79 KB
if_x25.h	881 B
if_xdp.h	4.89 KB
ife.h	351 B
igmp.h	2.99 KB
iio	-
ila.h	1.22 KB
in.h	10.15 KB
in6.h	7.36 KB
in_route.h	936 B
inet_diag.h	4.9 KB
inotify.h	3.21 KB
input-event-codes.h	29.5 KB
input.h	15.84 KB
io_uring.h	20.4 KB
ioctl.h	163 B
iommufd.h	28.39 KB
ioprio.h	4.08 KB
ip.h	4.7 KB
ip6_tunnel.h	1.91 KB
ip_vs.h	13.8 KB
ipc.h	2.05 KB
ipmi.h	15.08 KB
ipmi_bmc.h	488 B
ipmi_msgdefs.h	3.35 KB
ipmi_ssif_bmc.h	441 B
ipsec.h	947 B
ipv6.h	4.07 KB
ipv6_route.h	1.86 KB
ipx.h	2.29 KB
irqnr.h	104 B
isdn	-
iso_fs.h	6.33 KB
isst_if.h	14.92 KB
ivtv.h	2.95 KB
ivtvfb.h	1.18 KB
jffs2.h	6.66 KB
joystick.h	3.35 KB
kcm.h	822 B
kcmp.h	522 B
kcov.h	1.92 KB
kd.h	6.3 KB
kdev_t.h	383 B
kernel-page-flags.h	900 B
kernel.h	194 B
kernelcapi.h	1019 B
kexec.h	2.05 KB
keyboard.h	13.14 KB
keyctl.h	5.86 KB
kfd_ioctl.h	56.75 KB
kfd_sysfs.h	5.1 KB
kvm.h	46.76 KB
kvm_para.h	1001 B
l2tp.h	5.61 KB
landlock.h	10.14 KB
libc-compat.h	8.09 KB
limits.h	937 B
lirc.h	7.95 KB
llc.h	3.09 KB
loadpin.h	834 B
loop.h	3.32 KB
lp.h	4.09 KB
lsm.h	1.51 KB
lwtunnel.h	2.31 KB
magic.h	3.73 KB
major.h	4.55 KB
map_to_7segment.h	6.45 KB
matroxfb.h	1.43 KB
max2175.h	1.01 KB
mdio.h	23.78 KB
media-bus-format.h	6.75 KB
media.h	12.46 KB
mei.h	3.4 KB
mei_uuid.h	738 B
membarrier.h	9.14 KB
memfd.h	1.43 KB
mempolicy.h	2.51 KB
meye.h	2.47 KB
mii.h	9.27 KB
minix_fs.h	2.07 KB
misc	-
mman.h	1.75 KB
mmc	-
mmtimer.h	2.07 KB
module.h	293 B
mount.h	4.9 KB
mpls.h	2.25 KB
mpls_iptunnel.h	761 B
mptcp.h	3.67 KB
mptcp_pm.h	4.3 KB
mqueue.h	2.15 KB
mroute.h	5.78 KB
mroute6.h	4.81 KB
mrp_bridge.h	1.67 KB
msdos_fs.h	6.57 KB
msg.h	3.31 KB
mtio.h	7.98 KB
nbd-netlink.h	2.35 KB
nbd.h	3.77 KB
ncsi.h	4.71 KB
ndctl.h	6.67 KB
neighbour.h	5.91 KB
net.h	2.04 KB
net_dropmon.h	2.85 KB
net_namespace.h	715 B
net_tstamp.h	5.97 KB
netconf.h	614 B
netdev.h	5.39 KB
netdevice.h	2.2 KB
netfilter	-
netfilter.h	1.69 KB
netfilter_arp	-
netfilter_arp.h	445 B
netfilter_bridge	-
netfilter_bridge.h	1.14 KB
netfilter_decnet.h	1.72 KB
netfilter_ipv4	-
netfilter_ipv4.h	1.45 KB
netfilter_ipv6	-
netfilter_ipv6.h	1.35 KB
netlink.h	12.09 KB
netlink_diag.h	1.49 KB
netrom.h	807 B
nexthop.h	3.97 KB
nfc.h	10.95 KB
nfs.h	4.36 KB
nfs2.h	1.43 KB
nfs3.h	2.4 KB
nfs4.h	6.54 KB
nfs4_mount.h	1.89 KB
nfs_fs.h	1.62 KB
nfs_idmap.h	2.19 KB
nfs_mount.h	2.09 KB
nfsacl.h	718 B
nfsd	-
nfsd_netlink.h	1.95 KB
nilfs2_api.h	7.41 KB
nilfs2_ondisk.h	17.66 KB
nitro_enclaves.h	12.85 KB
nl80211.h	338.95 KB
nsfs.h	639 B
nubus.h	8 KB
nvme_ioctl.h	2.43 KB
nvram.h	532 B
omap3isp.h	20.36 KB
omapfb.h	5.78 KB
oom.h	511 B
openat2.h	1.42 KB
openvswitch.h	40.41 KB
packet_diag.h	1.63 KB
param.h	141 B
parport.h	3.56 KB
patchkey.h	892 B
pci.h	1.35 KB
pci_regs.h	60.58 KB
pcitest.h	920 B
perf_event.h	42.43 KB
personality.h	2.05 KB
pfkeyv2.h	10.32 KB
pfrut.h	7.8 KB
pg.h	2.34 KB
phantom.h	1.62 KB
phonet.h	4.57 KB
pidfd.h	256 B
pkt_cls.h	18.65 KB
pkt_sched.h	28.66 KB
pktcdvd.h	2.63 KB
pmu.h	5.32 KB
poll.h	22 B
posix_acl.h	1.22 KB
posix_acl_xattr.h	1.09 KB
posix_types.h	1.07 KB
ppdev.h	3.21 KB
ppp-comp.h	2.47 KB
ppp-ioctl.h	5.59 KB
ppp_defs.h	5.43 KB
pps.h	4.62 KB
pr.h	1.59 KB
prctl.h	10.81 KB
psample.h	2.57 KB
psci.h	5.02 KB
psp-dbc.h	5.16 KB
psp-sev.h	6.26 KB
ptp_clock.h	7.35 KB
ptrace.h	4.29 KB
qemu_fw_cfg.h	2.41 KB
qnx4_fs.h	2.27 KB
qnxtypes.h	624 B
qrtr.h	893 B
quota.h	6.16 KB
radeonfb.h	360 B
raid	-
random.h	1.38 KB
rds.h	10.91 KB
reboot.h	1.31 KB
reiserfs_fs.h	775 B
reiserfs_xattr.h	533 B
remoteproc_cdev.h	1.08 KB
resource.h	2.32 KB
rfkill.h	6.45 KB
rio_cm_cdev.h	3.17 KB
rio_mport_cdev.h	9.11 KB
rkisp1-config.h	30.63 KB
romfs_fs.h	1.21 KB
rose.h	2.18 KB
route.h	2.28 KB
rpl.h	814 B
rpl_iptunnel.h	424 B
rpmsg.h	1.03 KB
rpmsg_types.h	288 B
rseq.h	4.79 KB
rtc.h	5.19 KB
rtnetlink.h	20.8 KB
rxrpc.h	4.81 KB
scc.h	4.52 KB
sched	-
sched.h	6.12 KB
scif_ioctl.h	6.23 KB
screen_info.h	2.42 KB
sctp.h	35.18 KB
seccomp.h	5.6 KB
securebits.h	2.64 KB
sed-opal.h	5.29 KB
seg6.h	1.14 KB
seg6_genl.h	589 B
seg6_hmac.h	423 B
seg6_iptunnel.h	984 B
seg6_local.h	3.78 KB
selinux_netlink.h	1.17 KB
sem.h	2.98 KB
serial.h	4.9 KB
serial_core.h	4.93 KB
serial_reg.h	15.65 KB
serio.h	2.09 KB
sev-guest.h	2.47 KB
shm.h	3.71 KB
signal.h	388 B
signalfd.h	1.2 KB
smc.h	8.31 KB
smc_diag.h	2.77 KB
smiapp.h	1.03 KB
snmp.h	13.92 KB
sock_diag.h	1.27 KB
socket.h	919 B
sockios.h	6.69 KB
sonet.h	2.24 KB
sonypi.h	5.18 KB
sound.h	1.21 KB
soundcard.h	44.96 KB
spi	-
stat.h	7.23 KB
stddef.h	1.69 KB
stm.h	1.25 KB
string.h	238 B
sunrpc	-
surface_aggregator	-
suspend_ioctls.h	1.4 KB
swab.h	6.76 KB
switchtec_ioctl.h	5.14 KB
sync_file.h	3.49 KB
synclink.h	8.77 KB
sysctl.h	25.3 KB
sysinfo.h	1.02 KB
target_core_user.h	4.52 KB
taskstats.h	8.13 KB
tc_act	-
tc_ematch	-
tcp.h	11.65 KB
tcp_metrics.h	1.94 KB
tdx-guest.h	1.27 KB
tee.h	13.09 KB
termios.h	172 B
thermal.h	3.23 KB
time.h	1.71 KB
time_types.h	1.24 KB
timerfd.h	936 B
times.h	278 B
timex.h	7.63 KB
tiocl.h	1.69 KB
tipc.h	8.62 KB
tipc_config.h	14.52 KB
tipc_netlink.h	9.17 KB
tipc_sockets_diag.h	468 B
tls.h	7.06 KB
toshiba.h	1.88 KB
tps6594_pfsm.h	1.13 KB
tty.h	1.55 KB
tty_flags.h	4.4 KB
types.h	1.6 KB
udf_fs_i.h	697 B
udmabuf.h	643 B
udp.h	1.65 KB
uhid.h	4.54 KB
uinput.h	9.04 KB
uio.h	732 B
uleds.h	798 B
ultrasound.h	4.46 KB
um_timetravel.h	3.87 KB
un.h	384 B
unistd.h	220 B
unix_diag.h	1.3 KB
usb	-
usbdevice_fs.h	8.12 KB
usbip.h	1.47 KB
userfaultfd.h	10.68 KB
userio.h	1.48 KB
utime.h	223 B
utsname.h	669 B
uuid.h	28 B
uvcvideo.h	2.57 KB
v4l2-common.h	2.01 KB
v4l2-controls.h	94.59 KB
v4l2-dv-timings.h	30.39 KB
v4l2-mediabus.h	5.3 KB
v4l2-subdev.h	9.76 KB
vbox_err.h	7.09 KB
vbox_vmmdev_types.h	11.38 KB
vboxguest.h	9.15 KB
vdpa.h	1.74 KB
vduse.h	9.58 KB
version.h	374 B
veth.h	224 B
vfio.h	70.12 KB
vfio_ccw.h	1.29 KB
vfio_zdev.h	2.48 KB
vhost.h	8.24 KB
vhost_types.h	4.77 KB
videodev2.h	98.83 KB
virtio_9p.h	2 KB
virtio_balloon.h	5.16 KB
virtio_blk.h	9.75 KB
virtio_bt.h	910 B
virtio_config.h	4.36 KB
virtio_console.h	3.08 KB
virtio_crypto.h	13.56 KB
virtio_fs.h	573 B
virtio_gpio.h	1.7 KB
virtio_gpu.h	11.28 KB
virtio_i2c.h	1.16 KB
virtio_ids.h	3.7 KB
virtio_input.h	2.46 KB
virtio_iommu.h	3.84 KB
virtio_mem.h	6.99 KB
virtio_mmio.h	4.85 KB
virtio_net.h	14.72 KB
virtio_pci.h	7.3 KB
virtio_pcidev.h	2.33 KB
virtio_pmem.h	641 B
virtio_ring.h	8.52 KB
virtio_rng.h	265 B
virtio_scmi.h	637 B
virtio_scsi.h	5.94 KB
virtio_snd.h	12.86 KB
virtio_types.h	2.1 KB
virtio_vsock.h	3.27 KB
vm_sockets.h	7.18 KB
vm_sockets_diag.h	963 B
vmcore.h	455 B
vsockmon.h	1.84 KB
vt.h	2.99 KB
vtpm_proxy.h	1.68 KB
wait.h	682 B
watch_queue.h	3.41 KB
watchdog.h	2.28 KB
wireguard.h	7.57 KB
wireless.h	41.7 KB
wmi.h	1.72 KB
wwan.h	295 B
x25.h	3.48 KB
xattr.h	2.95 KB
xdp_diag.h	1.43 KB
xfrm.h	12.33 KB
xilinx-v4l2-controls.h	2.91 KB
zorro.h	3.22 KB
zorro_ids.h	29.26 KB

Edit: virtio_snd.h

/* SPDX-License-Identifier: BSD-3-Clause */
/*
 * Copyright (C) 2021 OpenSynergy GmbH
 */
#ifndef VIRTIO_SND_IF_H
#define VIRTIO_SND_IF_H

#include <linux/virtio_types.h>

/*******************************************************************************
 * FEATURE BITS
 */
enum {
	/* device supports control elements */
	VIRTIO_SND_F_CTLS = 0
};

/*******************************************************************************
 * CONFIGURATION SPACE
 */
struct virtio_snd_config {
	/* # of available physical jacks */
	__le32 jacks;
	/* # of available PCM streams */
	__le32 streams;
	/* # of available channel maps */
	__le32 chmaps;
	/* # of available control elements */
	__le32 controls;
};

enum {
	/* device virtqueue indexes */
	VIRTIO_SND_VQ_CONTROL = 0,
	VIRTIO_SND_VQ_EVENT,
	VIRTIO_SND_VQ_TX,
	VIRTIO_SND_VQ_RX,
	/* # of device virtqueues */
	VIRTIO_SND_VQ_MAX
};

/*******************************************************************************
 * COMMON DEFINITIONS
 */

/* supported dataflow directions */
enum {
	VIRTIO_SND_D_OUTPUT = 0,
	VIRTIO_SND_D_INPUT
};

enum {
	/* jack control request types */
	VIRTIO_SND_R_JACK_INFO = 1,
	VIRTIO_SND_R_JACK_REMAP,

/* PCM control request types */
	VIRTIO_SND_R_PCM_INFO = 0x0100,
	VIRTIO_SND_R_PCM_SET_PARAMS,
	VIRTIO_SND_R_PCM_PREPARE,
	VIRTIO_SND_R_PCM_RELEASE,
	VIRTIO_SND_R_PCM_START,
	VIRTIO_SND_R_PCM_STOP,

/* channel map control request types */
	VIRTIO_SND_R_CHMAP_INFO = 0x0200,

/* control element request types */
	VIRTIO_SND_R_CTL_INFO = 0x0300,
	VIRTIO_SND_R_CTL_ENUM_ITEMS,
	VIRTIO_SND_R_CTL_READ,
	VIRTIO_SND_R_CTL_WRITE,
	VIRTIO_SND_R_CTL_TLV_READ,
	VIRTIO_SND_R_CTL_TLV_WRITE,
	VIRTIO_SND_R_CTL_TLV_COMMAND,

/* jack event types */
	VIRTIO_SND_EVT_JACK_CONNECTED = 0x1000,
	VIRTIO_SND_EVT_JACK_DISCONNECTED,

/* PCM event types */
	VIRTIO_SND_EVT_PCM_PERIOD_ELAPSED = 0x1100,
	VIRTIO_SND_EVT_PCM_XRUN,

/* control element event types */
	VIRTIO_SND_EVT_CTL_NOTIFY = 0x1200,

/* common status codes */
	VIRTIO_SND_S_OK = 0x8000,
	VIRTIO_SND_S_BAD_MSG,
	VIRTIO_SND_S_NOT_SUPP,
	VIRTIO_SND_S_IO_ERR
};

/* common header */
struct virtio_snd_hdr {
	__le32 code;
};

/* event notification */
struct virtio_snd_event {
	/* VIRTIO_SND_EVT_XXX */
	struct virtio_snd_hdr hdr;
	/* optional event data */
	__le32 data;
};

/* common control request to query an item information */
struct virtio_snd_query_info {
	/* VIRTIO_SND_R_XXX_INFO */
	struct virtio_snd_hdr hdr;
	/* item start identifier */
	__le32 start_id;
	/* item count to query */
	__le32 count;
	/* item information size in bytes */
	__le32 size;
};

/* common item information header */
struct virtio_snd_info {
	/* function group node id (High Definition Audio Specification 7.1.2) */
	__le32 hda_fn_nid;
};

/*******************************************************************************
 * JACK CONTROL MESSAGES
 */
struct virtio_snd_jack_hdr {
	/* VIRTIO_SND_R_JACK_XXX */
	struct virtio_snd_hdr hdr;
	/* 0 ... virtio_snd_config::jacks - 1 */
	__le32 jack_id;
};

/* supported jack features */
enum {
	VIRTIO_SND_JACK_F_REMAP = 0
};

struct virtio_snd_jack_info {
	/* common header */
	struct virtio_snd_info hdr;
	/* supported feature bit map (1 << VIRTIO_SND_JACK_F_XXX) */
	__le32 features;
	/* pin configuration (High Definition Audio Specification 7.3.3.31) */
	__le32 hda_reg_defconf;
	/* pin capabilities (High Definition Audio Specification 7.3.4.9) */
	__le32 hda_reg_caps;
	/* current jack connection status (0: disconnected, 1: connected) */
	__u8 connected;

__u8 padding[7];
};

/* jack remapping control request */
struct virtio_snd_jack_remap {
	/* .code = VIRTIO_SND_R_JACK_REMAP */
	struct virtio_snd_jack_hdr hdr;
	/* selected association number */
	__le32 association;
	/* selected sequence number */
	__le32 sequence;
};

/*******************************************************************************
 * PCM CONTROL MESSAGES
 */
struct virtio_snd_pcm_hdr {
	/* VIRTIO_SND_R_PCM_XXX */
	struct virtio_snd_hdr hdr;
	/* 0 ... virtio_snd_config::streams - 1 */
	__le32 stream_id;
};

/* supported PCM stream features */
enum {
	VIRTIO_SND_PCM_F_SHMEM_HOST = 0,
	VIRTIO_SND_PCM_F_SHMEM_GUEST,
	VIRTIO_SND_PCM_F_MSG_POLLING,
	VIRTIO_SND_PCM_F_EVT_SHMEM_PERIODS,
	VIRTIO_SND_PCM_F_EVT_XRUNS
};

/* supported PCM sample formats */
enum {
	/* analog formats (width / physical width) */
	VIRTIO_SND_PCM_FMT_IMA_ADPCM = 0,	/*  4 /  4 bits */
	VIRTIO_SND_PCM_FMT_MU_LAW,		/*  8 /  8 bits */
	VIRTIO_SND_PCM_FMT_A_LAW,		/*  8 /  8 bits */
	VIRTIO_SND_PCM_FMT_S8,			/*  8 /  8 bits */
	VIRTIO_SND_PCM_FMT_U8,			/*  8 /  8 bits */
	VIRTIO_SND_PCM_FMT_S16,			/* 16 / 16 bits */
	VIRTIO_SND_PCM_FMT_U16,			/* 16 / 16 bits */
	VIRTIO_SND_PCM_FMT_S18_3,		/* 18 / 24 bits */
	VIRTIO_SND_PCM_FMT_U18_3,		/* 18 / 24 bits */
	VIRTIO_SND_PCM_FMT_S20_3,		/* 20 / 24 bits */
	VIRTIO_SND_PCM_FMT_U20_3,		/* 20 / 24 bits */
	VIRTIO_SND_PCM_FMT_S24_3,		/* 24 / 24 bits */
	VIRTIO_SND_PCM_FMT_U24_3,		/* 24 / 24 bits */
	VIRTIO_SND_PCM_FMT_S20,			/* 20 / 32 bits */
	VIRTIO_SND_PCM_FMT_U20,			/* 20 / 32 bits */
	VIRTIO_SND_PCM_FMT_S24,			/* 24 / 32 bits */
	VIRTIO_SND_PCM_FMT_U24,			/* 24 / 32 bits */
	VIRTIO_SND_PCM_FMT_S32,			/* 32 / 32 bits */
	VIRTIO_SND_PCM_FMT_U32,			/* 32 / 32 bits */
	VIRTIO_SND_PCM_FMT_FLOAT,		/* 32 / 32 bits */
	VIRTIO_SND_PCM_FMT_FLOAT64,		/* 64 / 64 bits */
	/* digital formats (width / physical width) */
	VIRTIO_SND_PCM_FMT_DSD_U8,		/*  8 /  8 bits */
	VIRTIO_SND_PCM_FMT_DSD_U16,		/* 16 / 16 bits */
	VIRTIO_SND_PCM_FMT_DSD_U32,		/* 32 / 32 bits */
	VIRTIO_SND_PCM_FMT_IEC958_SUBFRAME	/* 32 / 32 bits */
};

/* supported PCM frame rates */
enum {
	VIRTIO_SND_PCM_RATE_5512 = 0,
	VIRTIO_SND_PCM_RATE_8000,
	VIRTIO_SND_PCM_RATE_11025,
	VIRTIO_SND_PCM_RATE_16000,
	VIRTIO_SND_PCM_RATE_22050,
	VIRTIO_SND_PCM_RATE_32000,
	VIRTIO_SND_PCM_RATE_44100,
	VIRTIO_SND_PCM_RATE_48000,
	VIRTIO_SND_PCM_RATE_64000,
	VIRTIO_SND_PCM_RATE_88200,
	VIRTIO_SND_PCM_RATE_96000,
	VIRTIO_SND_PCM_RATE_176400,
	VIRTIO_SND_PCM_RATE_192000,
	VIRTIO_SND_PCM_RATE_384000
};

struct virtio_snd_pcm_info {
	/* common header */
	struct virtio_snd_info hdr;
	/* supported feature bit map (1 << VIRTIO_SND_PCM_F_XXX) */
	__le32 features;
	/* supported sample format bit map (1 << VIRTIO_SND_PCM_FMT_XXX) */
	__le64 formats;
	/* supported frame rate bit map (1 << VIRTIO_SND_PCM_RATE_XXX) */
	__le64 rates;
	/* dataflow direction (VIRTIO_SND_D_XXX) */
	__u8 direction;
	/* minimum # of supported channels */
	__u8 channels_min;
	/* maximum # of supported channels */
	__u8 channels_max;

__u8 padding[5];
};

/* set PCM stream format */
struct virtio_snd_pcm_set_params {
	/* .code = VIRTIO_SND_R_PCM_SET_PARAMS */
	struct virtio_snd_pcm_hdr hdr;
	/* size of the hardware buffer */
	__le32 buffer_bytes;
	/* size of the hardware period */
	__le32 period_bytes;
	/* selected feature bit map (1 << VIRTIO_SND_PCM_F_XXX) */
	__le32 features;
	/* selected # of channels */
	__u8 channels;
	/* selected sample format (VIRTIO_SND_PCM_FMT_XXX) */
	__u8 format;
	/* selected frame rate (VIRTIO_SND_PCM_RATE_XXX) */
	__u8 rate;

__u8 padding;
};

/*******************************************************************************
 * PCM I/O MESSAGES
 */

/* I/O request header */
struct virtio_snd_pcm_xfer {
	/* 0 ... virtio_snd_config::streams - 1 */
	__le32 stream_id;
};

/* I/O request status */
struct virtio_snd_pcm_status {
	/* VIRTIO_SND_S_XXX */
	__le32 status;
	/* current device latency */
	__le32 latency_bytes;
};

/*******************************************************************************
 * CHANNEL MAP CONTROL MESSAGES
 */
struct virtio_snd_chmap_hdr {
	/* VIRTIO_SND_R_CHMAP_XXX */
	struct virtio_snd_hdr hdr;
	/* 0 ... virtio_snd_config::chmaps - 1 */
	__le32 chmap_id;
};

/* standard channel position definition */
enum {
	VIRTIO_SND_CHMAP_NONE = 0,	/* undefined */
	VIRTIO_SND_CHMAP_NA,		/* silent */
	VIRTIO_SND_CHMAP_MONO,		/* mono stream */
	VIRTIO_SND_CHMAP_FL,		/* front left */
	VIRTIO_SND_CHMAP_FR,		/* front right */
	VIRTIO_SND_CHMAP_RL,		/* rear left */
	VIRTIO_SND_CHMAP_RR,		/* rear right */
	VIRTIO_SND_CHMAP_FC,		/* front center */
	VIRTIO_SND_CHMAP_LFE,		/* low frequency (LFE) */
	VIRTIO_SND_CHMAP_SL,		/* side left */
	VIRTIO_SND_CHMAP_SR,		/* side right */
	VIRTIO_SND_CHMAP_RC,		/* rear center */
	VIRTIO_SND_CHMAP_FLC,		/* front left center */
	VIRTIO_SND_CHMAP_FRC,		/* front right center */
	VIRTIO_SND_CHMAP_RLC,		/* rear left center */
	VIRTIO_SND_CHMAP_RRC,		/* rear right center */
	VIRTIO_SND_CHMAP_FLW,		/* front left wide */
	VIRTIO_SND_CHMAP_FRW,		/* front right wide */
	VIRTIO_SND_CHMAP_FLH,		/* front left high */
	VIRTIO_SND_CHMAP_FCH,		/* front center high */
	VIRTIO_SND_CHMAP_FRH,		/* front right high */
	VIRTIO_SND_CHMAP_TC,		/* top center */
	VIRTIO_SND_CHMAP_TFL,		/* top front left */
	VIRTIO_SND_CHMAP_TFR,		/* top front right */
	VIRTIO_SND_CHMAP_TFC,		/* top front center */
	VIRTIO_SND_CHMAP_TRL,		/* top rear left */
	VIRTIO_SND_CHMAP_TRR,		/* top rear right */
	VIRTIO_SND_CHMAP_TRC,		/* top rear center */
	VIRTIO_SND_CHMAP_TFLC,		/* top front left center */
	VIRTIO_SND_CHMAP_TFRC,		/* top front right center */
	VIRTIO_SND_CHMAP_TSL,		/* top side left */
	VIRTIO_SND_CHMAP_TSR,		/* top side right */
	VIRTIO_SND_CHMAP_LLFE,		/* left LFE */
	VIRTIO_SND_CHMAP_RLFE,		/* right LFE */
	VIRTIO_SND_CHMAP_BC,		/* bottom center */
	VIRTIO_SND_CHMAP_BLC,		/* bottom left center */
	VIRTIO_SND_CHMAP_BRC		/* bottom right center */
};

/* maximum possible number of channels */
#define VIRTIO_SND_CHMAP_MAX_SIZE	18

struct virtio_snd_chmap_info {
	/* common header */
	struct virtio_snd_info hdr;
	/* dataflow direction (VIRTIO_SND_D_XXX) */
	__u8 direction;
	/* # of valid channel position values */
	__u8 channels;
	/* channel position values (VIRTIO_SND_CHMAP_XXX) */
	__u8 positions[VIRTIO_SND_CHMAP_MAX_SIZE];
};

/*******************************************************************************
 * CONTROL ELEMENTS MESSAGES
 */
struct virtio_snd_ctl_hdr {
	/* VIRTIO_SND_R_CTL_XXX */
	struct virtio_snd_hdr hdr;
	/* 0 ... virtio_snd_config::controls - 1 */
	__le32 control_id;
};

/* supported roles for control elements */
enum {
	VIRTIO_SND_CTL_ROLE_UNDEFINED = 0,
	VIRTIO_SND_CTL_ROLE_VOLUME,
	VIRTIO_SND_CTL_ROLE_MUTE,
	VIRTIO_SND_CTL_ROLE_GAIN
};

/* supported value types for control elements */
enum {
	VIRTIO_SND_CTL_TYPE_BOOLEAN = 0,
	VIRTIO_SND_CTL_TYPE_INTEGER,
	VIRTIO_SND_CTL_TYPE_INTEGER64,
	VIRTIO_SND_CTL_TYPE_ENUMERATED,
	VIRTIO_SND_CTL_TYPE_BYTES,
	VIRTIO_SND_CTL_TYPE_IEC958
};

/* supported access rights for control elements */
enum {
	VIRTIO_SND_CTL_ACCESS_READ = 0,
	VIRTIO_SND_CTL_ACCESS_WRITE,
	VIRTIO_SND_CTL_ACCESS_VOLATILE,
	VIRTIO_SND_CTL_ACCESS_INACTIVE,
	VIRTIO_SND_CTL_ACCESS_TLV_READ,
	VIRTIO_SND_CTL_ACCESS_TLV_WRITE,
	VIRTIO_SND_CTL_ACCESS_TLV_COMMAND
};

struct virtio_snd_ctl_info {
	/* common header */
	struct virtio_snd_info hdr;
	/* element role (VIRTIO_SND_CTL_ROLE_XXX) */
	__le32 role;
	/* element value type (VIRTIO_SND_CTL_TYPE_XXX) */
	__le32 type;
	/* element access right bit map (1 << VIRTIO_SND_CTL_ACCESS_XXX) */
	__le32 access;
	/* # of members in the element value */
	__le32 count;
	/* index for an element with a non-unique name */
	__le32 index;
	/* name identifier string for the element */
	__u8 name[44];
	/* additional information about the element's value */
	union {
		/* VIRTIO_SND_CTL_TYPE_INTEGER */
		struct {
			/* minimum supported value */
			__le32 min;
			/* maximum supported value */
			__le32 max;
			/* fixed step size for value (0 = variable size) */
			__le32 step;
		} integer;
		/* VIRTIO_SND_CTL_TYPE_INTEGER64 */
		struct {
			/* minimum supported value */
			__le64 min;
			/* maximum supported value */
			__le64 max;
			/* fixed step size for value (0 = variable size) */
			__le64 step;
		} integer64;
		/* VIRTIO_SND_CTL_TYPE_ENUMERATED */
		struct {
			/* # of options supported for value */
			__le32 items;
		} enumerated;
	} value;
};

struct virtio_snd_ctl_enum_item {
	/* option name */
	__u8 item[64];
};

struct virtio_snd_ctl_iec958 {
	/* AES/IEC958 channel status bits */
	__u8 status[24];
	/* AES/IEC958 subcode bits */
	__u8 subcode[147];
	/* nothing */
	__u8 pad;
	/* AES/IEC958 subframe bits */
	__u8 dig_subframe[4];
};

struct virtio_snd_ctl_value {
	union {
		/* VIRTIO_SND_CTL_TYPE_BOOLEAN|INTEGER value */
		__le32 integer[128];
		/* VIRTIO_SND_CTL_TYPE_INTEGER64 value */
		__le64 integer64[64];
		/* VIRTIO_SND_CTL_TYPE_ENUMERATED value (option indexes) */
		__le32 enumerated[128];
		/* VIRTIO_SND_CTL_TYPE_BYTES value */
		__u8 bytes[512];
		/* VIRTIO_SND_CTL_TYPE_IEC958 value */
		struct virtio_snd_ctl_iec958 iec958;
	} value;
};

/* supported event reason types */
enum {
	/* element's value has changed */
	VIRTIO_SND_CTL_EVT_MASK_VALUE = 0,
	/* element's information has changed */
	VIRTIO_SND_CTL_EVT_MASK_INFO,
	/* element's metadata has changed */
	VIRTIO_SND_CTL_EVT_MASK_TLV
};

struct virtio_snd_ctl_event {
	/* VIRTIO_SND_EVT_CTL_NOTIFY */
	struct virtio_snd_hdr hdr;
	/* 0 ... virtio_snd_config::controls - 1 */
	__le16 control_id;
	/* event reason bit map (1 << VIRTIO_SND_CTL_EVT_MASK_XXX) */
	__le16 mask;
};

#endif /* VIRTIO_SND_IF_H */