Get a mixer group's configurable parameters
#include <sys/asoundlib.h> int snd_mixer_group_read( snd_mixer_t *handle, snd_mixer_group_t *group );
libasound.so
The snd_mixer_group_read() function reads the snd_mixer_group_t structure for the group identified by the gid substructure (for more information, see snd_mixer_gid_t).
You must initialize the gid substructure before calling this function. |
Zero on success, or a negative error value on error.
QNX Neutrino
Safety: | |
---|---|
Cancellation point | No |
Interrupt handler | No |
Signal handler | Yes |
Thread | Yes |
The group struct must be initialized to a known state before making the call: use memset() to set the struct to zero, and then set the gid member to specify which group to read.
snd_mixer_gid_t, snd_mixer_group_t, snd_mixer_group_write(), snd_mixer_groups()