shithub: openh264

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Additional fix for Bugzilla reported bug-1522172. Do not try tocontinue B-frame temporal direct prediction when previously encountered a concealed errors.

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

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

@@ -2371,6 +2371,12 @@

     memset (pCurLayer->pRefIndex[LIST_1][iMbXy], 0, sizeof (int8_t) * 16);

     pCtx->bMbRefConcealed = pCtx->bRPLRError || pCtx->bMbRefConcealed || ! (ppRefPicL0[0] && ppRefPicL0[0]->bIsComplete)

                             || ! (ppRefPicL1[0] && ppRefPicL1[0]->bIsComplete);

+

+    if (pCtx->bMbRefConcealed) {

+      SLogContext* pLogCtx = & (pCtx->sLogCtx);

+      WelsLog (pLogCtx, WELS_LOG_ERROR, "Ref Picture for B-Slice is lost, B-Slice decoding cannot be continued!");

+      return GENERATE_ERROR_NO (ERR_LEVEL_SLICE_DATA, ERR_INFO_REFERENCE_PIC_LOST);

+    }

     //predict iMv

     SubMbType subMbType;

     if (pSliceHeader->iDirectSpatialMvPredFlag) {