Function switch_core_codec_decode_video 

pub unsafe extern "C" fn switch_core_codec_decode_video(
    codec: *mut switch_codec_t,
    frame: *mut switch_frame_t,
) -> switch_status_t

\brief Decode video data using a codec handle \param codec the codec handle to use \param frame the frame to be decoded \param img the new image in I420 format, allocated by the codec \param flag flags to exchange \return SWITCH_STATUS_SUCCESS if the data was decoded, and a non-NULL img