Provides input samples (or NULL to clear any remaining data)
according to directions as configured by the subclass
using the API. Input data ref management is performed
by base class, subclass should not care or intervene,
and input data is only valid until next call to base class,
most notably a call to gstaudio.audio_encoder.AudioEncoder.finishFrame.
Provides input samples (or NULL to clear any remaining data) according to directions as configured by the subclass using the API. Input data ref management is performed by base class, subclass should not care or intervene, and input data is only valid until next call to base class, most notably a call to gstaudio.audio_encoder.AudioEncoder.finishFrame.