[x265] [PATCH] stats: use input source pictures to calculate avgerage and max luma level

[Deepthi Nandakumar]

Thanks, much cleaner. Queued.

On Thu, Aug 6, 2015 at 10:32 AM, <kavitha at multicorewareinc.com> wrote:

> # HG changeset patch
> # User Kavitha Sampath <kavitha at multicorewareinc.com>
> # Date 1438837146 -19800
> #      Thu Aug 06 10:29:06 2015 +0530
> # Node ID 9fcc0e6bdc54758478e37e988e640fb52303d28b
> # Parent  377a996a8d74110f838ff2e3cef1c42781d6d730
> stats: use input source pictures to calculate avgerage and max luma level
>
> diff -r 377a996a8d74 -r 9fcc0e6bdc54 source/encoder/frameencoder.cpp
> --- a/source/encoder/frameencoder.cpp   Wed Aug 05 15:09:14 2015 +0530
> +++ b/source/encoder/frameencoder.cpp   Thu Aug 06 10:29:06 2015 +0530
> @@ -988,16 +988,17 @@
>              for (int n = 0; n < INTRA_MODES; n++)
>                  curRow.rowStats.cuIntraDistribution[depth][n] +=
> frameLog.cuIntraDistribution[depth][n];
>          }
> -        uint64_t ctuLumaLevel = 0;
> -        uint64_t ctuNoOfPixels = 0;
> -        for (uint32_t i = 0; i < (best.reconYuv.m_size *
> best.reconYuv.m_size); i++)
> +
> +        /* calculate maximum and average luma levels */
> +        uint32_t ctuLumaLevel = 0;
> +        uint32_t ctuNoOfPixels = best.fencYuv->m_size *
> best.fencYuv->m_size;
> +        for (uint32_t i = 0; i < ctuNoOfPixels; i++)
>          {
> -            ctuLumaLevel += *(best.reconYuv.m_buf[0] + i);
> -            ctuNoOfPixels++;
> -            if ((*(best.reconYuv.m_buf[0] + i)) >
> curRow.rowStats.maxLumaLevel)
> -                curRow.rowStats.maxLumaLevel = *(best.reconYuv.m_buf[0] +
> i);
> +            pixel p = best.fencYuv->m_buf[0][i];
> +            ctuLumaLevel += p;
> +            curRow.rowStats.maxLumaLevel = X265_MAX(p,
> curRow.rowStats.maxLumaLevel);
>          }
> -        curRow.rowStats.lumaLevel += (double)(ctuLumaLevel /
> ctuNoOfPixels);
> +        curRow.rowStats.lumaLevel += (double)(ctuLumaLevel) /
> ctuNoOfPixels;
>
>          curEncData.m_cuStat[cuAddr].totalBits = best.totalBits;
>          x265_emms();
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>
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