snd_ctl_ext_t Struct Reference

#include <control_external.h>

Collaboration diagram for snd_ctl_ext_t:

Data Fields
unsigned int	version
int	card_idx
char	id [16]
char	driver [16]
char	name [32]
char	longname [80]
char	mixername [80]
int	poll_fd
const snd_ctl_ext_callback_t *	callback
void *	private_data
snd_ctl_t *	handle
int	nonblock
int	subscribed
union {
snd_ctl_ext_tlv_rw_t *   c
const unsigned int *   p
}	tlv

Detailed Description

Handle of control ext

External control plugin handle

Field Documentation

callback

const snd_ctl_ext_callback_t* snd_ctl_ext_t::callback

callbacks of this plugin; must be filled before calling snd_pcm_ioplug_create()

card_idx

int snd_ctl_ext_t::card_idx

Index of this card; must be filled before calling snd_ctl_ext_create()

driver

char snd_ctl_ext_t::driver[16]

Driver name of this card; must be filled before calling snd_ctl_ext_create()

handle

snd_ctl_t* snd_ctl_ext_t::handle

control handle filled by snd_ctl_ext_create()

id

char snd_ctl_ext_t::id[16]

ID string of this card; must be filled before calling snd_ctl_ext_create()

longname

char snd_ctl_ext_t::longname[80]

Long name of this card; must be filled before calling snd_ctl_ext_create()

mixername

char snd_ctl_ext_t::mixername[80]

Mixer name of this card; must be filled before calling snd_ctl_ext_create()

name

char snd_ctl_ext_t::name[32]

short name of this card; must be filled before calling snd_ctl_ext_create()

nonblock

int snd_ctl_ext_t::nonblock

non-block mode; read-only

poll_fd

int snd_ctl_ext_t::poll_fd

poll descriptor

private_data

void* snd_ctl_ext_t::private_data

private data, which can be used freely in the driver callbacks

subscribed

int snd_ctl_ext_t::subscribed

events subscribed; read-only

union { ... } snd_ctl_ext_t::tlv

optional TLV data for the control (since protocol 1.0.1)

version

unsigned int snd_ctl_ext_t::version

protocol version; SND_CTL_EXT_VERSION must be filled here before calling snd_ctl_ext_create()

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The documentation for this struct was generated from the following file:

• /build/alsa-lib-aVNupx/alsa-lib-1.2.8/include/control_external.h