struct snd_ctl_ext

Overview

Handle of control ext

External control plugin handle More…

#include <control_external.h>

struct snd_ctl_ext {
    // 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;
    snd_ctl_ext_tlv_rw_t* c;
    const unsigned int* p;
    union snd_ctl_ext::@7 tlv;
};

Detailed Documentation

Handle of control ext

External control plugin handle

Fields

unsigned int version

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

int card_idx

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

char id[16]

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

char driver[16]

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

char name[32]

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

char longname[80]

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

char mixername[80]

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

int poll_fd

poll descriptor

const snd_ctl_ext_callback_t* callback

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

void* private_data

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

snd_ctl_t* handle

control handle filled by snd_ctl_ext_create()

int nonblock

non-block mode; read-only

int subscribed

events subscribed; read-only

unnamed-union tlv

optional TLV data for the control (since protocol 1.0.1)