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Linshizhi
ffmpeg.wasm-core
Commits
2f329db9
Commit
2f329db9
authored
Oct 08, 2011
by
Mans Rullgard
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mpeg12enc: use sign_extend() function
Signed-off-by:
Mans Rullgard
<
mans@mansr.com
>
parent
60f10e0a
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mpeg12enc.c
libavcodec/mpeg12enc.c
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libavcodec/mpeg12enc.c
View file @
2f329db9
...
...
@@ -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
--
;
...
...
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