snd_mixer_elements_t

Information about all elements in a mixer

Synopsis:

typedef struct snd_mixer_elements_s
{
    int32_t     elements, elements_size, elements_over;
    uint8_t     zero[4];            /* alignment -- zero fill */
    snd_mixer_eid_t *pelements;
    void        *pzero;             /* align pointers on 64-bits;
                                       point to NULL */
    uint8_t     reserved[128];      /* must be filled with zeroes */
}       snd_mixer_elements_t;

Description:

The snd_mixer_elements_t structure describes all the elements in a mixer. You can fill in this structure by calling snd_mixer_elements() .

We recommend that you work with mixer groups instead of manipulating the elements directly.

The members of the snd_mixer_elements_t structure include:

elements
The total number of elements in the mixer.
elements_size
The size of the pelements storage location, in sizeof( snd_mixer_eid_t ) units (i.e. the number of entries in the pelements array). Set this element before calling snd_mixer_elements().
elements_over
The number of elements that couldn't be copied to the storage location.
pelements
NULL, or a pointer to an array of snd_mixer_eid_t structures.

If pelements isn't NULL, snd_mixer_elements() stores the mixer element IDs in the array.

Classification:

QNX Neutrino