struct snd_pcm_ioplug

Overview

Handle of ioplug

I/O plugin handle More…

#include <pcm_ioplug.h>

struct snd_pcm_ioplug {
    // fields

    unsigned int version;
    const char* name;
    unsigned int flags;
    int poll_fd;
    unsigned int poll_events;
    unsigned int mmap_rw;
    const snd_pcm_ioplug_callback_t* callback;
    void* private_data;
    snd_pcm_t* pcm;
    snd_pcm_stream_t stream;
    snd_pcm_state_t state;
    snd_pcm_uframes_t appl_ptr;
    snd_pcm_uframes_t hw_ptr;
    int nonblock;
    snd_pcm_access_t access;
    snd_pcm_format_t format;
    unsigned int channels;
    unsigned int rate;
    snd_pcm_uframes_t period_size;
    snd_pcm_uframes_t buffer_size;
};

Detailed Documentation

Handle of ioplug

I/O plugin handle

Fields

unsigned int version

protocol version; SND_PCM_IOPLUG_VERSION must be filled here before calling snd_pcm_ioplug_create()

const char* name

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

unsigned int flags

SND_PCM_IOPLUG_FLAG_XXX

int poll_fd

poll file descriptor

unsigned int poll_events

poll events

unsigned int mmap_rw

pseudo mmap mode

const snd_pcm_ioplug_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_pcm_t* pcm

PCM handle filled by snd_pcm_extplug_create()

snd_pcm_stream_t stream

stream direcion; read-only

snd_pcm_state_t state

current PCM state; read-only

snd_pcm_uframes_t appl_ptr

application pointer; read-only

snd_pcm_uframes_t hw_ptr

hw pointer; read-only

int nonblock

non-block mode; read-only

snd_pcm_access_t access

access type; filled after hw_params is called

snd_pcm_format_t format

PCM format; filled after hw_params is called

unsigned int channels

number of channels; filled after hw_params is called

unsigned int rate

rate; filled after hw_params is called

snd_pcm_uframes_t period_size

period size; filled after hw_params is called

snd_pcm_uframes_t buffer_size

buffer size; filled after hw_params is called