experimenting with mode decision in TAppencoder

[eejaja77]

Hi friends,

I'm trying to experiment on mode decision in the TAppEncoder which is in the HEVC reference software.

The problem: The encoder is raising the following flag as I tried to run it in visual studio:- Unhandled exception at 0x00a68b06 in TAppEncoder.exe:0xC0000005:Access violation reading location 0x00000010.

Steps that gave the error: I modified the function void TComYuv::SubtractLuma(...). I modified it to return some variables that I want to use in making mode decision in void TEncCu::deriveTestModeAMP(.....)

The encoder ran without problems with the changes I made in SubtractLuma(...). I think that the problem is from my codes in deriveTestModeAMP(...).

Part of deriveTestModeAMP(...) which has my modification is shown below:

void TEncCu::deriveTestModeAMP(.....)
{

TComYuv* pcYuvSrc1;
TComDataCU* ptt;
TComYuv* pcYuvSrc0;
TComYuv* ptk;
TComYuv* pttk;
pcYuvSrc1=NULL;
pcYuvSrc0=NULL;
ptk=NULL;
ptt=NULL;
pttk=NULL;
UInt uiTrUnitIdx=0;
UInt uiPartSize=eParentPartSize;
Pel* pSrc0 = pcYuvSrc0->getLumaAddr(uiTrUnitIdx, uiPartSize );
Pel* pSrc1 = pcYuvSrc1->getLumaAddr(uiTrUnitIdx,uiPartSize );
Pel* pDst =pttk->getLumaAddr(uiTrUnitIdx,uiPartSize );
ptk->subtractLuma( pcYuvSrc0, pcYuvSrc1, uiTrUnitIdx, uiPartSize);

if ( rpcBestCU->getPartitionSize(0) == SIZE_2NxN )
{
bTestAMP_Hor = true;
}
}

I will be grateful for any assistance.

[gosalak]

I am wondering how you can access pcYuvSrc1 and pcYuvSrc0 after setting them to NULL.

[eejaja77]

Thank you very much for pointing that out. I will factor that into the codes and check it out again.