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 );
(QNX Software Development Platform 6.6 io-audio patch [patch ID 4510] or later) 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. Each AFM also has a symbolic name associated with (e.g., icc, voice, anc, and ese).
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.
QNX Neutrino
Safety: | |
---|---|
Cancellation point | No |
Interrupt handler | No |
Signal handler | Yes |
Thread | No |