[x265] [PATCH] sliceype: Bidir cost estimation added to lookahead

[Deepthi Devaki Akkoorath]

I was under the assumption that lookahead is not using qpel refinement. So
had included on Fpel/Hpels in this patch. I have sent a new patch with qpel
in bidir cost. So please ignore this patch.


On Tue, Oct 8, 2013 at 12:02 PM, <deepthidevaki at multicorewareinc.com> wrote:

> # HG changeset patch
> # User Deepthi Devaki <deepthidevaki at multicorewareinc.com>
> # Date 1381213898 -19800
> # Node ID 8f4428d24e63ae85495597864567071275397db0
> # Parent  d71078917df01e92605158a13b45ab35ee7cfc1c
> sliceype: Bidir cost estimation added to lookahead
>
> diff -r d71078917df0 -r 8f4428d24e63 source/encoder/slicetype.cpp
> --- a/source/encoder/slicetype.cpp      Mon Oct 07 12:48:32 2013 +0530
> +++ b/source/encoder/slicetype.cpp      Tue Oct 08 12:01:38 2013 +0530
> @@ -407,6 +407,28 @@
>              *fenc_costs[i] = me.motionEstimate(i ? fref1 : fref0, mvmin,
> mvmax, mvp, numc, mvc, merange, *fenc_mvs[i]);
>              COPY2_IF_LT(bcost, *fenc_costs[i], listused, i + 1);
>          }
> +        if(bBidir)
> +        {
> +            int hpel = ((*fenc_mvs[0]).y & 2) | (((*fenc_mvs[0]).x & 2)
> >> 1);
> +            pixel *src0 = fref0->lowresPlane[hpel] + pelOffset +
> ((*fenc_mvs[0]).x >> 2) + ((*fenc_mvs[0]).y >> 2) * fref0->lumaStride;
> +            hpel = ((*fenc_mvs[1]).y & 2) | (((*fenc_mvs[1]).x & 2) >> 1);
> +            pixel *src1 = fref1->lowresPlane[hpel] + pelOffset +
> ((*fenc_mvs[1]).x >> 2) + ((*fenc_mvs[1]).y >> 2) * fref1->lumaStride;
> +
> +            pixel ref[X265_LOWRES_CU_SIZE * X265_LOWRES_CU_SIZE];
> +            primitives.pixelavg_pp[PARTITION_8x8](ref,
> X265_LOWRES_CU_SIZE, src0, fref0->lumaStride, src1, fref1->lumaStride, 0);
> +
> +            int bicost =
> primitives.sad[PARTITION_8x8](fenc->lowresPlane[0] + pelOffset,
> fenc->lumaStride, ref, X265_LOWRES_CU_SIZE);
> +            COPY2_IF_LT(bcost, bicost, listused, 3);
> +
> +            //Try 0,0 candidates
> +            src0 = fref0->lowresPlane[0] + pelOffset;
> +            src1 = fref1->lowresPlane[0] + pelOffset;
> +
> +            primitives.pixelavg_pp[PARTITION_8x8](ref,
> X265_LOWRES_CU_SIZE, src0, fref0->lumaStride, src1, fref1->lumaStride, 0);
> +
> +            bicost = primitives.sad[PARTITION_8x8](fenc->lowresPlane[0] +
> pelOffset, fenc->lumaStride, ref, X265_LOWRES_CU_SIZE);
> +            COPY2_IF_LT(bcost, bicost, listused, 3);
> +        }
>      }
>      if (!fenc->bIntraCalculated)
>      {
>
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