# snd_pcm_extplug_t Struct Reference
[External Filter plugin SDK]

## Data Fields

unsigned int | version
const char * | name
const snd_pcm_extplug_callback_t * | callback
void * | private_data
snd_pcm_t * | pcm
snd_pcm_stream_t | stream
snd_pcm_format_t | format
snd_pcm_subformat_t | subformat
unsigned int | channels
unsigned int | rate
snd_pcm_format_t | slave_format
snd_pcm_subformat_t | slave_subformat
unsigned int | slave_channels

## Detailed Description

Handle of extplug

Handle of external filter plugin

## Field Documentation

const snd_pcm_extplug_callback_t* snd_pcm_extplug_t::callback

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

unsigned int snd_pcm_extplug_t::channels

channels hw parameter; filled after hw_params is caled

snd_pcm_format_t snd_pcm_extplug_t::format

format hw parameter; filled after hw_params is caled

const char* snd_pcm_extplug_t::name

name of this plugin; must be filled before calling snd_pcm_extplug_create()

snd_pcm_t* snd_pcm_extplug_t::pcm

PCM handle filled by snd_pcm_extplug_create()

void* snd_pcm_extplug_t::private_data

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

unsigned int snd_pcm_extplug_t::rate

rate hw parameter; filled after hw_params is caled

unsigned int snd_pcm_extplug_t::slave_channels

slave_channels hw parameter; filled after hw_params is caled

snd_pcm_format_t snd_pcm_extplug_t::slave_format

slave_format hw parameter; filled after hw_params is caled

snd_pcm_subformat_t snd_pcm_extplug_t::slave_subformat

slave_subformat hw parameter; filled after hw_params is caled

snd_pcm_stream_t snd_pcm_extplug_t::stream

stream direction; read-only status

snd_pcm_subformat_t snd_pcm_extplug_t::subformat

subformat hw parameter; filled after hw_params is caled

unsigned int snd_pcm_extplug_t::version

protocol version; SND_PCM_EXTPLUG_VERSION must be filled here before calling snd_pcm_extplug_create()

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

- /builddir/build/BUILD/alsa-lib-1.1.0/include/pcm_extplug.h

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