M_SQRT1_2          30 libavcodec/aarch64/fft_neon.S #define M_SQRT1_2 0.70710678118654752440
M_SQRT1_2          29 libavcodec/arm/fft_neon.S #define M_SQRT1_2 0.70710678118654752440
M_SQRT1_2         305 libavcodec/ppc/fft_altivec.S #define M_SQRT1_2      0.70710678118654752440  /* 1/sqrt(2) */
M_SQRT1_2          52 libavutil/mathematics.h #define M_SQRT1_2      0.70710678118654752440  /* 1/sqrt(2) */