snd_mixer_group_write()
Set a mixer group's configurable parameters
Synopsis:
#include <sys/asoundlib.h>
int snd_mixer_group_write(
snd_mixer_t *handle,
snd_mixer_group_t *group );
Arguments:
- handle
- The handle for the mixer device. This must have been created by snd_mixer_open().
- group
- A pointer to a snd_mixer_group_t structure that contains the information you want to set for the mixer group.
Library:
libasound.so
Use the -l asound option with qcc to link against this library.
Description:
The snd_mixer_group_write() function writes the snd_mixer_group_t structure to the driver. This structure contains the volume levels and mutes associated with the group.
Returns:
Zero on success, or a negative value on error.
Errors:
- -EBUSY
- The group has been modified by another application.
- -EINVAL
- Invalid handle argument.
- -ENXIO
- The group wasn't found.
Classification:
QNX Neutrino
| Safety: | |
|---|---|
| Cancellation point | No |
| Interrupt handler | No |
| Signal handler | Yes |
| Thread | Yes |
Caveats:
The write may fail with -EBUSY if another application has modified the group, and this application hasn't read that event yet using snd_mixer_read().
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