// ***************************************************************** -*- C++ -*-
/*
* Copyright (C) 2004-2018 Exiv2 authors
* This program is part of the Exiv2 distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, 5th Floor, Boston, MA 02110-1301 USA.
*/
/*
File: mrwimage.cpp
Author(s): Andreas Huggel (ahu) <ahuggel@gmx.net>
History: 13-May-06, ahu: created
Credits: See header file
*/
// *****************************************************************************
// included header files
#include "config.h"
#include "mrwimage.hpp"
#include "tiffimage.hpp"
#include "image.hpp"
#include "basicio.hpp"
#include "error.hpp"
#include "enforce.hpp"
#include "futils.hpp"
// + standard includes
#include <string>
#include <cstring>
#include <iostream>
#include <cassert>
// *****************************************************************************
// class member definitions
namespace Exiv2 {
MrwImage::MrwImage(BasicIo::AutoPtr io, bool /*create*/)
: Image(ImageType::mrw, mdExif | mdIptc | mdXmp, io)
{
} // MrwImage::MrwImage
std::string MrwImage::mimeType() const
{
return "image/x-minolta-mrw";
}
int MrwImage::pixelWidth() const
{
ExifData::const_iterator imageWidth = exifData_.findKey(Exiv2::ExifKey("Exif.Image.ImageWidth"));
if (imageWidth != exifData_.end() && imageWidth->count() > 0) {
return imageWidth->toLong();
}
return 0;
}
int MrwImage::pixelHeight() const
{
ExifData::const_iterator imageHeight = exifData_.findKey(Exiv2::ExifKey("Exif.Image.ImageLength"));
if (imageHeight != exifData_.end() && imageHeight->count() > 0) {
return imageHeight->toLong();
}
return 0;
}
void MrwImage::setExifData(const ExifData& /*exifData*/)
{
// Todo: implement me!
throw(Error(kerInvalidSettingForImage, "Exif metadata", "MRW"));
}
void MrwImage::setIptcData(const IptcData& /*iptcData*/)
{
// Todo: implement me!
throw(Error(kerInvalidSettingForImage, "IPTC metadata", "MRW"));
}
void MrwImage::setComment(const std::string& /*comment*/)
{
// not supported
throw(Error(kerInvalidSettingForImage, "Image comment", "MRW"));
}
void MrwImage::readMetadata()
{
#ifdef EXIV2_DEBUG_MESSAGES
std::cerr << "Reading MRW file " << io_->path() << "\n";
#endif
if (io_->open() != 0) {
throw Error(kerDataSourceOpenFailed, io_->path(), strError());
}
IoCloser closer(*io_);
// Ensure that this is the correct image type
if (!isMrwType(*io_, false)) {
if (io_->error() || io_->eof()) throw Error(kerFailedToReadImageData);
throw Error(kerNotAnImage, "MRW");
}
clearMetadata();
// Find the TTW block and read it into a buffer
uint32_t const len = 8;
byte tmp[len];
io_->read(tmp, len);
uint32_t pos = len;
uint32_t const end = getULong(tmp + 4, bigEndian);
pos += len;
enforce(pos <= end, kerFailedToReadImageData);
io_->read(tmp, len);
if (io_->error() || io_->eof()) throw Error(kerFailedToReadImageData);
while (memcmp(tmp + 1, "TTW", 3) != 0) {
uint32_t const siz = getULong(tmp + 4, bigEndian);
enforce(siz <= end - pos, kerFailedToReadImageData);
pos += siz;
io_->seek(siz, BasicIo::cur);
enforce(!io_->error() && !io_->eof(), kerFailedToReadImageData);
enforce(len <= end - pos, kerFailedToReadImageData);
pos += len;
io_->read(tmp, len);
enforce(!io_->error() && !io_->eof(), kerFailedToReadImageData);
}
const uint32_t siz = getULong(tmp + 4, bigEndian);
// First do an approximate bounds check of siz, so that we don't
// get DOS-ed by a 4GB allocation on the next line. If siz is
// greater than io_->size() then it is definitely invalid. But the
// exact bounds checking is done by the call to io_->read, which
// will fail if there are fewer than siz bytes left to read.
enforce(siz <= io_->size(), kerFailedToReadImageData);
DataBuf buf(siz);
io_->read(buf.pData_, buf.size_);
enforce(!io_->error() && !io_->eof(), kerFailedToReadImageData);
ByteOrder bo = TiffParser::decode(exifData_,
iptcData_,
xmpData_,
buf.pData_,
buf.size_);
setByteOrder(bo);
} // MrwImage::readMetadata
void MrwImage::writeMetadata()
{
// Todo: implement me!
throw(Error(kerWritingImageFormatUnsupported, "MRW"));
} // MrwImage::writeMetadata
// *************************************************************************
// free functions
Image::AutoPtr newMrwInstance(BasicIo::AutoPtr io, bool create)
{
Image::AutoPtr image(new MrwImage(io, create));
if (!image->good()) {
image.reset();
}
return image;
}
bool isMrwType(BasicIo& iIo, bool advance)
{
const int32_t len = 4;
byte buf[len];
iIo.read(buf, len);
if (iIo.error() || iIo.eof()) {
return false;
}
int rc = memcmp(buf, "\0MRM", 4);
if (!advance || rc != 0) {
iIo.seek(-len, BasicIo::cur);
}
return rc == 0;
}
} // namespace Exiv2