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imgcodecs: fix RBaseStream::setPos() outside of current block

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Seeking outside of the current block doesn't update actual data,
so getByte()/etc will get wrong data from stalled buffer.
This commit is contained in:
Alexander Alekhin 2019-03-31 10:16:49 +00:00
parent 6316b3ed91
commit 6dfb6a3016
1 changed files with 3 additions and 0 deletions
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3
modules/imgcodecs/src/bitstrm.cpp
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@ -175,8 +175,11 @@ void RBaseStream::setPos( int pos )
} }
int offset = pos % m_block_size; int offset = pos % m_block_size;
int old_block_pos = m_block_pos;
m_block_pos = pos - offset; m_block_pos = pos - offset;
m_current = m_start + offset; m_current = m_start + offset;
if (old_block_pos != m_block_pos)
readBlock();
} }