C                1327 libavcodec/bink.c #define C (1LL<<30)
C                 395 libavcodec/utvideodec.c #undef C
C                  33 libavfilter/af_afftdn.c #define C       (M_LN10 * 0.1)
C                 650 libavfilter/vf_ciescope.c #define C     0.310063, 0.316158
C                  37 libavfilter/vulkan.h #define C(N, S)          INDENT(N) #S "\n"