snd_pcm_info()

Get general information about the PCM device

Synopsis:

#include <sys/asoundlib.h>

int snd_pcm_info( snd_pcm_t * handle, 
                  snd_pcm_info_t * info );

Library:

libasound.so

Description:

The snd_pcm_info() function fills the info structure with data about the PCM device selected by handle.

typedef struct snd_pcm_info {
    int card;               
    unsigned int device;    
    unsigned int type;      
    unsigned int flags;     
    unsigned char id[64];   
    unsigned char name[80]; 
    int playback;           
    int capture;            
    int shared_card;        
    int shared_device;      
    char reserved[64];    
} snd_pcm_info_t;

where

card

Card number.

device

Device number

type

Soundcard type. The number corresponds to a value in <sys/asoundid.h>.

flags

One of:

SND_PCM_INFO_CAPTURE: Capture channel is present.
SND_PCM_INFO_DUPLEX: Hardware is capable the duplex operation.
SND_PCM_INFO_DUPLEX_RATE: Playback and capture rates must be same for the duplex operation.
SND_PCM_INFO_DUPLEX_MONO: Playback and capture must be monophonic for the duplex operation.
SND_PCM_INFO_PLAYBACK: Playback channel is present.

id[64]