241 #define AVG3(a, b, c) (((a) + 2 * (b) + (c) + 2) >> 2)  macro
247     AVG3(top[-1], top[0], top[1]),  in VE4()
248     AVG3(top[ 0], top[1], top[2]),  in VE4()
249     AVG3(top[ 1], top[2], top[3]),  in VE4()
250     AVG3(top[ 2], top[3], top[4])  in VE4()
264   WebPUint32ToMem(dst + 0 * BPS, 0x01010101U * AVG3(A, B, C));  in HE4()
265   WebPUint32ToMem(dst + 1 * BPS, 0x01010101U * AVG3(B, C, D));  in HE4()
266   WebPUint32ToMem(dst + 2 * BPS, 0x01010101U * AVG3(C, D, E));  in HE4()
267   WebPUint32ToMem(dst + 3 * BPS, 0x01010101U * AVG3(D, E, E));  in HE4()
288   DST(0, 3)                                     = AVG3(J, K, L);  in RD4()
289   DST(1, 3) = DST(0, 2)                         = AVG3(I, J, K);  in RD4()
290   DST(2, 3) = DST(1, 2) = DST(0, 1)             = AVG3(X, I, J);  in RD4()
291   DST(3, 3) = DST(2, 2) = DST(1, 1) = DST(0, 0) = AVG3(A, X, I);  in RD4()
292               DST(3, 2) = DST(2, 1) = DST(1, 0) = AVG3(B, A, X);  in RD4()
293                           DST(3, 1) = DST(2, 0) = AVG3(C, B, A);  in RD4()
294                                       DST(3, 0) = AVG3(D, C, B);  in RD4()
306   DST(0, 0)                                     = AVG3(A, B, C);  in LD4()
307   DST(1, 0) = DST(0, 1)                         = AVG3(B, C, D);  in LD4()
308   DST(2, 0) = DST(1, 1) = DST(0, 2)             = AVG3(C, D, E);  in LD4()
309   DST(3, 0) = DST(2, 1) = DST(1, 2) = DST(0, 3) = AVG3(D, E, F);  in LD4()
310               DST(3, 1) = DST(2, 2) = DST(1, 3) = AVG3(E, F, G);  in LD4()
311                           DST(3, 2) = DST(2, 3) = AVG3(F, G, H);  in LD4()
312                                       DST(3, 3) = AVG3(G, H, H);  in LD4()
329   DST(0, 3) =             AVG3(K, J, I);  in VR4()
330   DST(0, 2) =             AVG3(J, I, X);  in VR4()
331   DST(0, 1) = DST(1, 3) = AVG3(I, X, A);  in VR4()
332   DST(1, 1) = DST(2, 3) = AVG3(X, A, B);  in VR4()
333   DST(2, 1) = DST(3, 3) = AVG3(A, B, C);  in VR4()
334   DST(3, 1) =             AVG3(B, C, D);  in VR4()
351   DST(0, 1) =             AVG3(A, B, C);  in VL4()
352   DST(1, 1) = DST(0, 3) = AVG3(B, C, D);  in VL4()
353   DST(2, 1) = DST(1, 3) = AVG3(C, D, E);  in VL4()
354   DST(3, 1) = DST(2, 3) = AVG3(D, E, F);  in VL4()
355               DST(3, 2) = AVG3(E, F, G);  in VL4()
356               DST(3, 3) = AVG3(F, G, H);  in VL4()
367   DST(1, 0) =             AVG3(I, J, K);  in HU4()
368   DST(3, 0) = DST(1, 1) = AVG3(J, K, L);  in HU4()
369   DST(3, 1) = DST(1, 2) = AVG3(K, L, L);  in HU4()
389   DST(3, 0)             = AVG3(A, B, C);  in HD4()
390   DST(2, 0)             = AVG3(X, A, B);  in HD4()
391   DST(1, 0) = DST(3, 1) = AVG3(I, X, A);  in HD4()
392   DST(1, 1) = DST(3, 2) = AVG3(J, I, X);  in HD4()
393   DST(1, 2) = DST(3, 3) = AVG3(K, J, I);  in HD4()
394   DST(1, 3)             = AVG3(L, K, J);  in HD4()
398 #undef AVG3