typedef struct FlipContext {
const AVClass *class;
int max_step[4]; ///< max pixel step for each plane, expressed as a number of bytes
+ int bayer_plus1; ///< 1 .. not a Bayer input format, 2 .. Bayer input format
int planewidth[4]; ///< width of each plane
int planeheight[4]; ///< height of each plane