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/AliOS-Things-master/components/SDL2/src/image/external/libwebp-1.0.2/src/enc/
A Dpicture_csp_enc.c163 #define SFIX 2 // fixed-point precision of RGB and Y/W macro
167 #define SHALF (1 << SFIX >> 1)
168 #define MAX_Y_T ((256 << SFIX) - 1)
169 #define SROUNDER (1 << (YUV_FIX + SFIX - 1))
324 return ((fixed_y_t)a << SFIX) | SHALF; in UpLift()
383 return clip_8b(16 + (luma >> (YUV_FIX + SFIX))); in ConvertRGBToY()
388 return clip_8b(128 + (u >> (YUV_FIX + SFIX))); in ConvertRGBToU()
393 return clip_8b(128 + (v >> (YUV_FIX + SFIX))); in ConvertRGBToV()

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