ref: cb1c0f9b5a8b5103d88a561f301073b754334f1e
dir: /codec/decoder/core/src/error_concealment.cpp/
/*!
* \copy
* Copyright (c) 2013, Cisco Systems
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* error_concealment.cpp: Wels decoder error concealment implementation
*/
#include "error_code.h"
#include "expand_pic.h"
#include "manage_dec_ref.h"
#include "copy_mb.h"
#include "error_concealment.h"
#include "cpu_core.h"
namespace WelsDec {
//Init
void InitErrorCon (PWelsDecoderContext pCtx) {
if (pCtx->iErrorConMethod == ERROR_CON_SLICE_COPY) {
pCtx->sCopyFunc.pCopyLumaFunc = WelsCopy16x16_c;
pCtx->sCopyFunc.pCopyChromaFunc = WelsCopy8x8_c;
#if defined(X86_ASM)
if (pCtx->uiCpuFlag & WELS_CPU_MMXEXT) {
pCtx->sCopyFunc.pCopyChromaFunc = WelsCopy8x8_mmx; //aligned
}
if (pCtx->uiCpuFlag & WELS_CPU_SSE2) {
pCtx->sCopyFunc.pCopyLumaFunc = WelsCopy16x16_sse2; //this is aligned copy;
}
#endif //X86_ASM
#if defined(HAVE_NEON)
if (pCtx->uiCpuFlag & WELS_CPU_NEON) {
pCtx->sCopyFunc.pCopyChromaFunc = WelsCopy8x8_neon; //aligned
}
#endif //HAVE_NEON
} //TODO add more methods here
return;
}
//Do error concealment using frame copy method
void DoErrorConFrameCopy (PWelsDecoderContext pCtx) {
PPicture pDstPic = pCtx->pDec;
PPicture pSrcPic = pCtx->pPreviousDecodedPictureInDpb;
uint32_t uiHeightInPixelY = (pCtx->pSps->iMbHeight) << 4;
int32_t iStrideY = pDstPic->iLinesize[0];
int32_t iStrideUV = pDstPic->iLinesize[1];
if (pSrcPic == NULL) { //no ref pic, assign specific data to picture
memset (pDstPic->pData[0], 0, uiHeightInPixelY * iStrideY);
memset (pDstPic->pData[1], 0, (uiHeightInPixelY >> 1) * iStrideUV);
memset (pDstPic->pData[2], 0, (uiHeightInPixelY >> 1) * iStrideUV);
} else { //has ref pic here
memcpy (pDstPic->pData[0], pSrcPic->pData[0], uiHeightInPixelY * iStrideY);
memcpy (pDstPic->pData[1], pSrcPic->pData[1], (uiHeightInPixelY >> 1) * iStrideUV);
memcpy (pDstPic->pData[2], pSrcPic->pData[2], (uiHeightInPixelY >> 1) * iStrideUV);
}
}
//Do error concealment using slice copy method
void DoErrorConSliceCopy (PWelsDecoderContext pCtx) {
int32_t iMbWidth = (int32_t) pCtx->pSps->iMbWidth;
int32_t iMbHeight = (int32_t) pCtx->pSps->iMbHeight;
PPicture pDstPic = pCtx->pDec;
PPicture pSrcPic = pCtx->pPreviousDecodedPictureInDpb;
//uint8_t *pDstData[3], *pSrcData[3];
bool* pMbCorrectlyDecodedFlag = pCtx->pCurDqLayer->pMbCorrectlyDecodedFlag;
//Do slice copy late
int32_t iMbXyIndex;
uint8_t* pSrcData, *pDstData;
uint32_t iSrcStride; // = pSrcPic->iLinesize[0];
uint32_t iDstStride = pDstPic->iLinesize[0];
for (int32_t iMbY = 0; iMbY < iMbHeight; ++iMbY) {
for (int32_t iMbX = 0; iMbX < iMbWidth; ++iMbX) {
iMbXyIndex = iMbY * iMbWidth + iMbX;
if (!pMbCorrectlyDecodedFlag[iMbXyIndex]) {
if (pSrcPic != NULL) {
iSrcStride = pSrcPic->iLinesize[0];
//Y component
pDstData = pDstPic->pData[0] + iMbY * 16 * iDstStride + iMbX * 16;;
pSrcData = pSrcPic->pData[0] + iMbY * 16 * iSrcStride + iMbX * 16;
pCtx->sCopyFunc.pCopyLumaFunc (pDstData, iDstStride, pSrcData, iSrcStride);
//U component
pDstData = pDstPic->pData[1] + iMbY * 8 * iDstStride / 2 + iMbX * 8;
pSrcData = pSrcPic->pData[1] + iMbY * 8 * iSrcStride / 2 + iMbX * 8;
pCtx->sCopyFunc.pCopyChromaFunc (pDstData, iDstStride / 2, pSrcData, iSrcStride / 2);
//V component
pDstData = pDstPic->pData[2] + iMbY * 8 * iDstStride / 2 + iMbX * 8;
pSrcData = pSrcPic->pData[2] + iMbY * 8 * iSrcStride / 2 + iMbX * 8;
pCtx->sCopyFunc.pCopyChromaFunc (pDstData, iDstStride / 2, pSrcData, iSrcStride / 2);
} else { //pSrcPic == NULL
//Y component
pDstData = pDstPic->pData[0] + iMbY * 16 * iDstStride + iMbX * 16;
for (int32_t i = 0; i < 16; ++i) {
memset (pDstData, 0, 16);
pDstData += iDstStride;
}
//U component
pDstData = pDstPic->pData[1] + iMbY * 8 * iDstStride / 2 + iMbX * 8;
for (int32_t i = 0; i < 8; ++i) {
memset (pDstData, 0, 8);
pDstData += iDstStride / 2;
}
//V component
pDstData = pDstPic->pData[2] + iMbY * 8 * iDstStride / 2 + iMbX * 8;
for (int32_t i = 0; i < 8; ++i) {
memset (pDstData, 0, 8);
pDstData += iDstStride / 2;
}
} //
} //!pMbCorrectlyDecodedFlag[iMbXyIndex]
} //iMbX
} //iMbY
}
//Mark erroneous frame as Ref Pic into DPB
int32_t MarkECFrameAsRef (PWelsDecoderContext pCtx) {
int32_t iRet = WelsMarkAsRef (pCtx);
if (iRet != ERR_NONE) {
pCtx->pDec = NULL;
return iRet;
}
ExpandReferencingPicture (pCtx->pDec->pData, pCtx->pDec->iWidthInPixel, pCtx->pDec->iHeightInPixel,
pCtx->pDec->iLinesize,
pCtx->sExpandPicFunc.pfExpandLumaPicture, pCtx->sExpandPicFunc.pfExpandChromaPicture);
pCtx->pDec = NULL;
return ERR_NONE;
}
bool NeedErrorCon (PWelsDecoderContext pCtx) {
bool bNeedEC = false;
int32_t iMbNum = pCtx->pSps->iMbWidth * pCtx->pSps->iMbHeight;
for (int32_t i = 0; i < iMbNum; ++i) {
if (!pCtx->pCurDqLayer->pMbCorrectlyDecodedFlag[i]) {
bNeedEC = true;
break;
}
}
return bNeedEC;
}
// ImplementErrorConceal
// Do actual error concealment
void ImplementErrorCon (PWelsDecoderContext pCtx) {
if (!NeedErrorCon (pCtx))
return;
if (ERROR_CON_DISABLE == pCtx->iErrorConMethod) {
pCtx->iErrorCode |= dsBitstreamError;
return;
} else if (ERROR_CON_FRAME_COPY == pCtx->iErrorConMethod) {
DoErrorConFrameCopy (pCtx);
} else if (ERROR_CON_SLICE_COPY == pCtx->iErrorConMethod) {
DoErrorConSliceCopy (pCtx);
} //TODO add other EC methods here in the future
//mark the erroneous frame as Ref pic in DPB
MarkECFrameAsRef (pCtx);
//need update frame_num due current frame is well decoded
pCtx->iPrevFrameNum = pCtx->pSliceHeader->iFrameNum;
if (pCtx->bLastHasMmco5)
pCtx->iPrevFrameNum = 0;
}
} // namespace WelsDec