Create a handle and open a connection to a specified AMP Functional Module (AFM)
#include <sys/asoundlib.h> int snd_afm_open( snd_afm_t **handle, int card, int device );
The snd_afm_open() function creates a handle and opens a connection to the Acoustics Management Platform (AMP) Functional Module (AFM) for sound card number card and audio device number device. AFMs are installed in /dev/snd and their names are in the form afmCxDy, where x is the card number, and y is the device number. The card number depends on the order in which the cards are specified in the io-audio .conf file.
There are no defaults; your application must specify all the arguments to this function.
Using names for audio devices (snd_afm_open_name()) is preferred to using numbers (snd_afm_open()).
Zero on success, or a negative error code.
This function can also return the negative of the values that open() can assign to errno (see open() in the QNX Neutrino C Library Reference).
QNX Neutrino
Safety: | |
---|---|
Cancellation point | Yes |
Interrupt handler | No |
Signal handler | Yes |
Thread | Yes |
This function is not thread safe if the handle (snd_afm_t) is used across multiple threads.