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avutil/internal: Remove unused ff_rint64_clip()

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Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt 2022-08-27 17:30:36 +02:00
parent 65f6851448
commit 5b0856d2b9
1 changed files with 0 additions and 36 deletions
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36
libavutil/internal.h
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@ -217,42 +217,6 @@ void avpriv_request_sample(void *avc,
#define SUINT32 uint32_t #define SUINT32 uint32_t
#endif #endif
/**
* Clip and convert a double value into the long long amin-amax range.
* This function is needed because conversion of floating point to integers when
* it does not fit in the integer's representation does not necessarily saturate
* correctly (usually converted to a cvttsd2si on x86) which saturates numbers
* > INT64_MAX to INT64_MIN. The standard marks such conversions as undefined
* behavior, allowing this sort of mathematically bogus conversions. This provides
* a safe alternative that is slower obviously but assures safety and better
* mathematical behavior.
* @param a value to clip
* @param amin minimum value of the clip range
* @param amax maximum value of the clip range
* @return clipped value
*/
static av_always_inline av_const int64_t ff_rint64_clip(double a, int64_t amin, int64_t amax)
{
int64_t res;
#if defined(HAVE_AV_CONFIG_H) && defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2
if (amin > amax) abort();
#endif
// INT64_MAX+1,INT64_MIN are exactly representable as IEEE doubles
// do range checks first
if (a >= 9223372036854775808.0)
return amax;
if (a <= -9223372036854775808.0)
return amin;
// safe to call llrint and clip accordingly
res = llrint(a);
if (res > amax)
return amax;
if (res < amin)
return amin;
return res;
}
/** /**
* A wrapper for open() setting O_CLOEXEC. * A wrapper for open() setting O_CLOEXEC.
*/ */