unsafe extern "C" fn audio_encoder_getcaps<T: AudioEncoderImpl>(
ptr: *mut GstAudioEncoder,
filter: *mut GstCaps,
) -> *mut GstCaps
unsafe extern "C" fn audio_encoder_getcaps<T: AudioEncoderImpl>(
ptr: *mut GstAudioEncoder,
filter: *mut GstCaps,
) -> *mut GstCaps