swscale: fix another yuv range conversion overflow in 16bit scaling.

(cherry picked from commit 81cc7d0bd1eab0aa782ff8dd49e087025a42cdee)

diff --git a/libswscale/swscale.c b/libswscale/swscale.c
index 644f84858cd498d0bafc7edc731339f76c60d157..06ce8ff41789e68651b047b34405a0a342258e6d 100644 (file)
--- a/libswscale/swscale.c
+++ b/libswscale/swscale.c
@@ -2001,7 +2001,7 @@ static void lumRangeToJpeg16_c(int16_t *_dst, int width)
     int i;
     int32_t *dst = (int32_t *) _dst;
     for (i = 0; i < width; i++)
-        dst[i] = (FFMIN(dst[i],30189<<4)*19077 - (39057361<<4))>>14;
+        dst[i] = (FFMIN(dst[i],30189<<4)*4769 - (39057361<<2))>>12;
 }
 static void lumRangeFromJpeg16_c(int16_t *_dst, int width)
 {