Impala Documentation

String Impala::Core::Stream::Lavc::VideoAccessObject::CurrentHashBeforeConversion ( ) const [inline]

Definition at line 503 of file VideoAccessObject.h.

References CurrentFrameValid(), Impala::Max(), Impala::Core::Array::MD5Hash(), mFrame, Impala::Core::Array::Array2dTem< StorT, elemSize, ArithT >::PB(), and Impala::Core::Array::Array2dTem< StorT, elemSize, ArithT >::SetValue().

Referenced by Impala::Core::Stream::Lavc::VideoAccessStrategy::CurrentFrameHashBeforeConversion(), and Impala::Core::Stream::Lavc::VideoAccessStrategy::ProcessFrame().

00504     {
00505         if (!CurrentFrameValid())
00506             return "DUMMY";
00507 
00508         int nrOfPicturePlanes = 0;
00509         int maxLineSize = 1;
00510         for ( ; nrOfPicturePlanes < 4; nrOfPicturePlanes++)
00511         {
00512             int lineSize = mFrame->linesize[nrOfPicturePlanes];
00513             if (lineSize <= 0)
00514                 break;
00515             maxLineSize = Max(lineSize, maxLineSize);
00516         }
00517 
00518         // construct an array holding the original (unconverted) picture's data
00519         Array::Array2dScalarUInt8* arr = new Array::Array2dScalarUInt8(
00520             maxLineSize, nrOfPicturePlanes, 0, 0);
00521         size_t numBytes = sizeof(UInt8) * nrOfPicturePlanes * maxLineSize;
00522         memset((void*) arr->PB(), 0, numBytes);
00523         for (int p = 0; p < nrOfPicturePlanes; p++)
00524         {
00525             int lineSize = mFrame->linesize[p];
00526             for (int e = 0; e < lineSize; e++)
00527             {
00528                 UInt8 value = mFrame->data[p][e];
00529                 arr->SetValue(value, e, p);
00530             }
00531         }
00532         String hash = Array::MD5Hash(arr);
00533         delete arr;
00534         return hash;
00535     }

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