A4                 34 libavcodec/binkdsp.c #define A4 -5352
A4                 32 libavcodec/eaidct.c #define A4    669 /* cos(pi/8)*sqrt(2)<<9 */
A4                 52 libavcodec/faandct.c #define A4 1.30656296487637652774 // cos(pi*2/16)sqrt(2)
A4                 36 libavcodec/faanidct.c #define A4 0.70710678118654752438 // cos(pi*4/16)