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Merge pull request #1525 from dongzha/FixbuginMVClip

fix mv clip at right boarder

--- a/codec/decoder/core/src/rec_mb.cpp

+++ b/codec/decoder/core/src/rec_mb.cpp

@@ -206,8 +206,8 @@

                            int32_t iBlkWidth, int32_t iBlkHeight, int16_t iMVs[2]) {

   int32_t iFullMVx = (iXOffset << 2) + iMVs[0]; //quarter pixel

   int32_t iFullMVy = (iYOffset << 2) + iMVs[1];

-  iFullMVx = WELS_CLIP3 (iFullMVx, ((-PADDING_LENGTH + 2) << 2), ((pMCRefMem->iPicWidth + PADDING_LENGTH - 17) << 2));

-  iFullMVy = WELS_CLIP3 (iFullMVy, ((-PADDING_LENGTH + 2) << 2), ((pMCRefMem->iPicHeight + PADDING_LENGTH - 17) << 2));

+  iFullMVx = WELS_CLIP3 (iFullMVx, ((-PADDING_LENGTH + 2) << 2), ((pMCRefMem->iPicWidth + PADDING_LENGTH - 19) << 2));

+  iFullMVy = WELS_CLIP3 (iFullMVy, ((-PADDING_LENGTH + 2) << 2), ((pMCRefMem->iPicHeight + PADDING_LENGTH - 19) << 2));

   int32_t iSrcPixOffsetLuma = (iFullMVx >> 2) + (iFullMVy >> 2) * pMCRefMem->iSrcLineLuma;

   int32_t iSrcPixOffsetChroma = (iFullMVx >> 3) + (iFullMVy >> 3) * pMCRefMem->iSrcLineChroma;