snd_mixer_element_info_build()
Get information about a mixer element and allocate required buffering
Synopsis:
#include <sys/asoundlib.h>
int snd_mixer_element_info_build(
snd_mixer_t *handle,
snd_mixer_element_info_t *element );
Arguments:
- handle
- The handle for the mixer device. This must have been created by snd_mixer_open().
- element
- A pointer to a snd_mixer_element_info_t.
Library:
libasound.so
Use the -l asound option with qcc to link against this library.
Description:
The snd_mixer_element_info_build() function performs the same task as snd_mixer_element_info(), but it also allocates the extra buffering that a caller must provide to hold the full element information.
Use snd_mixer_element_info_free() to free the additional memory this function allocates.
Returns:
EOK on success, a negative errno upon failure.
Errors:
- -EINVAL
- NULL mixer or info argument, or invalid element type.
- -ENXIO
- The element wasn't found.
- -EIO
- No element information available.
- -ENOMEM
- Buffer allocation failed.
Classification:
QNX Neutrino
| Safety: | |
|---|---|
| Cancellation point | No |
| Interrupt handler | No |
| Signal handler | Yes |
| Thread | Yes |
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