This should be useful for the sofalizer filter.
Signed-off-by: Ganesh Ajjanagadde <gajjanaga...@gmail.com>
---
libavutil/intmath.h | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/libavutil/intmath.h b/libavutil/intmath.h
index 2016723..2bb0b62 100644
--- a/libavutil/intmath.h
+++ b/libavutil/intmath.h
@@ -96,6 +96,9 @@ static av_always_inline av_const int ff_log2_16bit_c(unsigned
int v)
#ifndef ff_ctzll
#define ff_ctzll(v) __builtin_ctzll(v)
#endif
+#ifndef ff_clz
+#define ff_clz(v) __builtin_clz(v)
+#endif
#endif
#endif
@@ -135,6 +138,21 @@ static av_always_inline av_const int ff_ctzll_c(long long
v)
}
#endif
+#ifndef ff_clz
+#define ff_clz ff_clz_c
+static av_always_inline av_const unsigned ff_clz_c(unsigned v)
+{
+ unsigned i = sizeof(x) * 8;
+
+ while (x) {
+ x >>= 1;
+ i--;
+ }
+
+ return i;
+}
+#endif
+
/**
* @}
*/
--
2.6.4
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