Remove reimplementation of av_log2

Originally committed as revision 9735 to svn://svn.ffmpeg.org/ffmpeg/trunk

Remove reimplementation of av_log2
Originally committed as revision 9735 to svn://svn.ffmpeg.org/ffmpeg/trunk
d0da8020 · Vitor Sessak · ef0d7a0d · d0da8020
Commit d0da8020 authored Jul 18, 2007 by Vitor Sessak
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Showing with 2 additions and 10 deletions

alac.c libavcodec/alac.c +2 -10

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--- a/libavcodec/alac.c
+++ b/libavcodec/alac.c
@@ -139,17 +139,9 @@ static int alac_set_info(ALACContext *alac)
    return 0;
 }
-/* hideously inefficient. could use a bitmask search,
+static inline int count_leading_zeros(int32_t input)
- * alternatively bsr on x86,
- */
-static int count_leading_zeros(int32_t input)
 {
-    int i = 0;
+    return 31-av_log2(input);
-    while (!(0x80000000 & input) && i < 32) {
-        i++;
-        input = input << 1;
-    }
-    return i;
 }
 static void bastardized_rice_decompress(ALACContext *alac,