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libavcodec/exr : fix float to uint16 conversion for negative float value 

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit e46d637452)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Martin Vignali 2017-04-25 22:52:50 +02:00 committed by Michael Niedermayer
parent a82e65f0ae
commit ad5e264ae3
1 changed files with 2 additions and 2 deletions
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libavcodec/exr.c
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@ -186,9 +186,9 @@ static union av_intfloat32 exr_half2float(uint16_t hf)
* *
* @return normalized 16-bit unsigned int * @return normalized 16-bit unsigned int
*/ */
static inline uint16_t exr_flt2uint(uint32_t v) static inline uint16_t exr_flt2uint(int32_t v)
{ {
unsigned int exp = v >> 23; int32_t exp = v >> 23;
// "HACK": negative values result in exp< 0, so clipping them to 0 // "HACK": negative values result in exp< 0, so clipping them to 0
// is also handled by this condition, avoids explicit check for sign bit. // is also handled by this condition, avoids explicit check for sign bit.
if (exp <= 127 + 7 - 24) // we would shift out all bits anyway if (exp <= 127 + 7 - 24) // we would shift out all bits anyway