diff options
| -rw-r--r-- | libavcodec/mpeg12enc.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/libavcodec/mpeg12enc.c b/libavcodec/mpeg12enc.c index 79c46beef9..f4455be925 100644 --- a/libavcodec/mpeg12enc.c +++ b/libavcodec/mpeg12enc.c @@ -27,6 +27,7 @@ #include "avcodec.h" #include "dsputil.h" +#include "mathops.h" #include "mpegvideo.h" #include "mpeg12.h" @@ -690,8 +691,7 @@ static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code) int bit_size = f_or_b_code - 1; int range = 1 << bit_size; /* modulo encoding */ - int l= INT_BIT - 5 - bit_size; - val= (val<<l)>>l; + val = sign_extend(val, 5 + bit_size); if (val >= 0) { val--; |