SDW_FRAME_COLS
extern int sdw_cols[SDW_FRAME_COLS];
for (c = 0; c < SDW_FRAME_COLS; c++) {
int sdw_cols[SDW_FRAME_COLS] = {2, 4, 6, 8, 10, 12, 14, 16};
for (i = 0; i < SDW_FRAME_COLS; i++) {
#define SDW_FRAME_ROW_COLS (SDW_FRAME_ROWS * SDW_FRAME_COLS)