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Properly read the sign bit

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This commit is contained in:
Martin Tůma 2021-11-08 22:10:36 +01:00
parent ca5b7d72c4
commit 9bfc7e8b89
1 changed files with 4 additions and 6 deletions
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10
src/map/IMG/huffmanstream.h
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@ -125,14 +125,12 @@ bool HuffmanDeltaStream<BitStream>::readDelta(int sign, qint32 &delta)
return false; return false;
if (symbol && !sign) { if (symbol && !sign) {
if (!this->_symbolDataSize) quint32 bit;
if (!this->read(1, bit))
return false; return false;
else { sign = bit ? -1 : 1;
sign = ((1U << (this->_symbolDataSize - 1)) & this->_symbolData)
? -1 : 1;
this->_symbolDataSize--;
}
} }
delta = sign * symbol; delta = sign * symbol;
return true; return true;