B6                 46 libavcodec/faandct.c #define B6 1.847759065022573512256366378793576574 // (cos(pi*6/16)sqrt(2))^-1
B6                 33 libavcodec/faanidct.c #define B6 0.5411961001461969843997 // cos(pi*6/16)sqrt(2)