B7                 47 libavcodec/faandct.c #define B7 3.624509785411551372409941227504289587 // (cos(pi*7/16)sqrt(2))^-1
B7                 34 libavcodec/faanidct.c #define B7 0.2758993792829430123360 // cos(pi*7/16)sqrt(2)