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add a new av_clip_int16() function to libavutil

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Originally committed as revision 10076 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Aurelien Jacobs 2007-08-11 21:59:01 +00:00
parent b9c684a2b8
commit ddb8ebe7a1
2 changed files with 13 additions and 2 deletions
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4
libavutil/avutil.h
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@ -30,8 +30,8 @@
#define AV_STRINGIFY(s) AV_TOSTRING(s)
#define AV_TOSTRING(s) #s
#define LIBAVUTIL_VERSION_INT ((49<<16)+(4<<8)+1)
#define LIBAVUTIL_VERSION 49.4.1
#define LIBAVUTIL_VERSION_INT ((49<<16)+(5<<8)+0)
#define LIBAVUTIL_VERSION 49.5.0
#define LIBAVUTIL_BUILD LIBAVUTIL_VERSION_INT
#define LIBAVUTIL_IDENT "Lavu" AV_STRINGIFY(LIBAVUTIL_VERSION)

11
libavutil/common.h
View File

@ -192,6 +192,17 @@ static inline uint8_t av_clip_uint8(int a)
else return a;
}
/**
* clip a signed integer value into the -32768,32767 range
* @param a value to clip
* @return clipped value
*/
static inline int16_t av_clip_int16(int a)
{
if ((a+32768) & ~65535) return (a>>31) ^ 32767;
else return a;
}
/* math */
int64_t ff_gcd(int64_t a, int64_t b);