[FFmpeg-cvslog] libavutil/common: clip nan value to amin
Mark Reid
git at videolan.org
Mon Nov 15 21:51:44 EET 2021
ffmpeg | branch: master | Mark Reid <mindmark at gmail.com> | Sun Nov 14 22:22:20 2021 -0800| [c3502f4f75583a530bc54e2cb6754236d72f204b] | committer: James Almer
libavutil/common: clip nan value to amin
Changes av_clipf to return amin if a is nan.
Before if a is nan av_clipf_c returned nan and
av_clipf_sse would return amax. Now the both
should behave the same.
This works because nan > amin is false.
The max(nan, amin) will be amin.
Signed-off-by: James Almer <jamrial at gmail.com>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=c3502f4f75583a530bc54e2cb6754236d72f204b
---
libavutil/common.h | 12 ++++++------
libavutil/x86/intmath.h | 8 ++++----
2 files changed, 10 insertions(+), 10 deletions(-)
diff --git a/libavutil/common.h b/libavutil/common.h
index 3cc1f07566..3eb9bc5f74 100644
--- a/libavutil/common.h
+++ b/libavutil/common.h
@@ -379,6 +379,8 @@ static av_always_inline int64_t av_sat_sub64_c(int64_t a, int64_t b) {
/**
* Clip a float value into the amin-amax range.
+ * If a is nan or -inf amin will be returned.
+ * If a is +inf amax will be returned.
* @param a value to clip
* @param amin minimum value of the clip range
* @param amax maximum value of the clip range
@@ -389,13 +391,13 @@ static av_always_inline av_const float av_clipf_c(float a, float amin, float ama
#if defined(HAVE_AV_CONFIG_H) && defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2
if (amin > amax) abort();
#endif
- if (a < amin) return amin;
- else if (a > amax) return amax;
- else return a;
+ return FFMIN(FFMAX(a, amin), amax);
}
/**
* Clip a double value into the amin-amax range.
+ * If a is nan or -inf amin will be returned.
+ * If a is +inf amax will be returned.
* @param a value to clip
* @param amin minimum value of the clip range
* @param amax maximum value of the clip range
@@ -406,9 +408,7 @@ static av_always_inline av_const double av_clipd_c(double a, double amin, double
#if defined(HAVE_AV_CONFIG_H) && defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2
if (amin > amax) abort();
#endif
- if (a < amin) return amin;
- else if (a > amax) return amax;
- else return a;
+ return FFMIN(FFMAX(a, amin), amax);
}
/** Compute ceil(log2(x)).
diff --git a/libavutil/x86/intmath.h b/libavutil/x86/intmath.h
index 40743fd13e..1520c25ec9 100644
--- a/libavutil/x86/intmath.h
+++ b/libavutil/x86/intmath.h
@@ -110,8 +110,8 @@ static av_always_inline av_const double av_clipd_sse2(double a, double amin, dou
#if defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2
if (amin > amax) abort();
#endif
- __asm__ ("minsd %2, %0 \n\t"
- "maxsd %1, %0 \n\t"
+ __asm__ ("maxsd %1, %0 \n\t"
+ "minsd %2, %0 \n\t"
: "+&x"(a) : "xm"(amin), "xm"(amax));
return a;
}
@@ -126,8 +126,8 @@ static av_always_inline av_const float av_clipf_sse(float a, float amin, float a
#if defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2
if (amin > amax) abort();
#endif
- __asm__ ("minss %2, %0 \n\t"
- "maxss %1, %0 \n\t"
+ __asm__ ("maxss %1, %0 \n\t"
+ "minss %2, %0 \n\t"
: "+&x"(a) : "xm"(amin), "xm"(amax));
return a;
}
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