Function alsa_sys::snd_pcm_area_silence

pub unsafe extern "C" fn snd_pcm_area_silence(
    dst_channel: *const snd_pcm_channel_area_t, 
    dst_offset: snd_pcm_uframes_t, 
    samples: c_uint, 
    format: snd_pcm_format_t
) -> c_int