avutil: Move av_rint64_clip_* to internal.h

The function is renamed to ff_rint64_clip()

This should avoid build failures on VS2012
Feel free to changes this to a different solution

Reviewed-by: James Almer <jamrial@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

libavutil/common.h

@@ -298,42 +298,6 @@ static av_always_inline av_const double av_clipd_c(double a, double amin, double
     else               return a;
 }
 
-/**
- * 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 av_rint64_clip_c(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;
-}
-
 /** Compute ceil(log2(x)).
  * @param x value used to compute ceil(log2(x))
  * @return computed ceiling of log2(x)
@@ -547,9 +511,6 @@ static av_always_inline av_const int av_popcount64_c(uint64_t x)
 #ifndef av_clipd
 #   define av_clipd         av_clipd_c
 #endif
-#ifndef av_rint64_clip
-#   define av_rint64_clip   av_rint64_clip_c
-#endif
 #ifndef av_popcount
 #   define av_popcount      av_popcount_c
 #endif

libavutil/internal.h

@@ -256,6 +256,43 @@ void avpriv_request_sample(void *avc,
 #   define ff_dlog(ctx, ...) do { if (0) av_log(ctx, AV_LOG_DEBUG, __VA_ARGS__); } while (0)
 #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.
  */