shithub: openh264

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add protection

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

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

@@ -198,8 +198,8 @@

     } else {

       iScale0 = pCtx->pECRefPic[0]->iFramePoc - iCurrPoc;

       iScale1 = pRef->iFramePoc - iCurrPoc;

-      iMVs[0] = pCtx->iECMVs[0][0] * iScale1 / iScale0;

-      iMVs[1] = pCtx->iECMVs[0][1] * iScale1 / iScale0;

+      iMVs[0] = iScale0 == 0 ? 0 : pCtx->iECMVs[0][0] * iScale1 / iScale0;

+      iMVs[1] = iScale0 == 0 ? 0 : pCtx->iECMVs[0][1] * iScale1 / iScale0;

     }

     pMCRefMem->pDstY = pDst[0];

     pMCRefMem->pDstU = pDst[1];