the audio properties of the buffer
parent #GstMeta
the offsets (in bytes) where each channel plane starts in the
buffer or %NULL if the buffer has interleaved layout; if not %NULL, this
is guaranteed to be an array of info.channels elements
the number of valid samples in the buffer
#GstAudioDownmixMeta defines an audio downmix matrix to be send along with audio buffers. These functions in this module help to create and attach the meta as well as extracting it.