[FFmpeg-devel] [PATCH] DCA: use FASTDIV in decode_blockcode()

[Kostya]

On Mon, Apr 12, 2010 at 04:40:40PM +0100, Mans Rullgard wrote:
> ---
>  libavcodec/dca.c |    6 ++++--
>  1 files changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/libavcodec/dca.c b/libavcodec/dca.c
> index 79ea373..8db25fd 100644
> --- a/libavcodec/dca.c
> +++ b/libavcodec/dca.c
> @@ -30,6 +30,7 @@
>  #include <stddef.h>
>  #include <stdio.h>
>  
> +#include "libavutil/intmath.h"
>  #include "libavutil/intreadwrite.h"
>  #include "avcodec.h"
>  #include "dsputil.h"
> @@ -907,8 +908,9 @@ static int decode_blockcode(int code, int levels, int *values)
>      int offset = (levels - 1) >> 1;
>  
>      for (i = 0; i < 4; i++) {
> -        values[i] = (code % levels) - offset;
> -        code /= levels;
> +        int div = FASTDIV(code, levels);
> +        values[i] = code - offset - div*levels;
> +        code = div;
>      }
>  
>      if (code == 0)

looks ok