opencv/3rdparty/openexr/IlmImf/ImfZipCompressor.cpp
Alexander Alekhin 878af7ada8
Merge pull request from alalek:update_openexr_2.3.0
3rdparty: update OpenEXR 2.3.0 ()

* openexr 2.2.1

* openexr 2.3.0

* openexr: build fixes

* openexr: build dwa tables on-demand
2019-06-10 20:04:23 +03:00

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///////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2004, Industrial Light & Magic, a division of Lucas
// Digital Ltd. LLC
//
// 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.
// * Neither the name of Industrial Light & Magic nor the names of
// its contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// 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
// OWNER 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.
//
///////////////////////////////////////////////////////////////////////////
//-----------------------------------------------------------------------------
//
// class ZipCompressor
//
//-----------------------------------------------------------------------------
#include "ImfZipCompressor.h"
#include "ImfCheckedArithmetic.h"
#include "Iex.h"
#include <zlib.h>
#include "ImfNamespace.h"
OPENEXR_IMF_INTERNAL_NAMESPACE_SOURCE_ENTER
ZipCompressor::ZipCompressor
(const Header &hdr,
size_t maxScanLineSize,
size_t numScanLines)
:
Compressor (hdr),
_maxScanLineSize (maxScanLineSize),
_numScanLines (numScanLines),
_outBuffer (0),
_zip(maxScanLineSize, numScanLines)
{
_outBuffer = new char[_zip.maxCompressedSize()];
}
ZipCompressor::~ZipCompressor ()
{
delete [] _outBuffer;
}
int
ZipCompressor::numScanLines () const
{
return _numScanLines;
}
int
ZipCompressor::compress (const char *inPtr,
int inSize,
int minY,
const char *&outPtr)
{
//
// Special case <20>- empty input buffer
//
if (inSize == 0)
{
outPtr = _outBuffer;
return 0;
}
int outSize = _zip.compress(inPtr, inSize, _outBuffer);
outPtr = _outBuffer;
return outSize;
}
int
ZipCompressor::uncompress (const char *inPtr,
int inSize,
int minY,
const char *&outPtr)
{
//
// Special case <20>- empty input buffer
//
if (inSize == 0)
{
outPtr = _outBuffer;
return 0;
}
int outSize = _zip.uncompress(inPtr, inSize, _outBuffer);
outPtr = _outBuffer;
return outSize;
}
OPENEXR_IMF_INTERNAL_NAMESPACE_SOURCE_EXIT