diff options
| author | Mans Rullgard <mans@mansr.com> | 2011-10-09 23:16:07 +0100 |
|---|---|---|
| committer | Mans Rullgard <mans@mansr.com> | 2011-10-09 23:22:14 +0100 |
| commit | aa498fef0dbd6eebd1b4dd90c36d3117cd9a17b2 (patch) | |
| tree | 03193ac1cacab49690ac6734dbecfbb76384e780 /libavcodec/mpeg12.c | |
| parent | 633ddb85192f1cc39d61fae98455eb6ae5638df0 (diff) | |
| download | ffmpeg-aa498fef0dbd6eebd1b4dd90c36d3117cd9a17b2.tar.gz | |
mpeg124: use sign_extend() function
Signed-off-by: Mans Rullgard <mans@mansr.com>
Diffstat (limited to 'libavcodec/mpeg12.c')
| -rw-r--r-- | libavcodec/mpeg12.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/libavcodec/mpeg12.c b/libavcodec/mpeg12.c index 6a12344139..5734ab8674 100644 --- a/libavcodec/mpeg12.c +++ b/libavcodec/mpeg12.c @@ -54,7 +54,7 @@ static VLC mv_vlc; /* as H.263, but only 17 codes */ static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred) { - int code, sign, val, l, shift; + int code, sign, val, shift; code = get_vlc2(&s->gb, mv_vlc.table, MV_VLC_BITS, 2); if (code == 0) { @@ -77,9 +77,7 @@ static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred) val += pred; /* modulo decoding */ - l = INT_BIT - 5 - shift; - val = (val << l) >> l; - return val; + return sign_extend(val, 5 + shift); } static inline int mpeg1_decode_block_intra(MpegEncContext *s, DCTELEM *block, int n) |