shithub: openh264

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use average downsampling fistly then general downsampling when dst resolution > 1/4 source resolution and dst resolution <1/2 source resolution

--- a/codec/processing/src/downsample/downsample.cpp

+++ b/codec/processing/src/downsample/downsample.cpp

@@ -220,7 +220,7 @@

         DownsampleHalfAverage ((uint8_t*)pDstPixMap->pPixel[2], pDstPixMap->iStride[2],

             (uint8_t*)pSrcV, iSrcStrideV, iSrcWidthUV, iSrcHeightUV);

         break;

-      } else if (((iHalfSrcWidth >> 1) >= iDstWidthY) && ((iHalfSrcHeight >> 1) >= iDstHeightY)) {

+      } else if ((iHalfSrcWidth > iDstWidthY) && (iHalfSrcHeight > iDstHeightY)){

         // use half average functions

         iDstStrideY = WELS_ALIGN (iHalfSrcWidth, 32);

         iDstStrideU = WELS_ALIGN (iHalfSrcWidth >> 1, 32);