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/*=========================================================================
Program: GDCM (Grassroots DICOM). A DICOM library
Copyright (c) 2006-2011 Mathieu Malaterre
All rights reserved.
See Copyright.txt or http://gdcm.sourceforge.net/Copyright.html for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
#include "gdcmStreamImageReader.h"
#include "gdcmFileMetaInformation.h"
#include "gdcmSystem.h"
#include "gdcmFilename.h"
#include "gdcmByteSwap.h"
#include "gdcmTrace.h"
#include "gdcmTesting.h"
#include "gdcmImageHelper.h"
#include "gdcmImageReader.h"
#include "gdcmImage.h"
#include "gdcmMediaStorage.h"
#include "gdcmRAWCodec.h"
#include "gdcmJPEGLSCodec.h"
int TestStreamImageRead(const char* filename, bool verbose = false, bool lossydump = false)
{
(void)lossydump;
if( verbose )
std::cerr << "Reading: " << filename << std::endl;
gdcm::StreamImageReader reader;
reader.SetFileName( filename );
bool canReadImageInformation = reader.ReadImageInformation();
if (!canReadImageInformation)
{
return 0; //unable to read tags as expected.
}
else
{
int res = 0;
//let's be tricky; each image will be read in portions, first the top half, then the bottom
//that way, we can test how the stream handles fragmentation of the data
//we could also loop this to get various different size combinations, but I'm not sure
//that's useful, yet.
std::vector<unsigned int> extent =
gdcm::ImageHelper::GetDimensionsValue(reader.GetFile());
//at this point, these values aren't used, but may be in the future
//unsigned short xmin = 0;
//unsigned short xmax = extent[0];
//unsigned short ymin = 0;
//unsigned short ymax = extent[1];
//unsigned short zmin = 0;
//unsigned short zmax = extent[2];
reader.DefinePixelExtent(0, (uint16_t)extent[0], 0, (uint16_t)extent[1], 0, (uint16_t)extent[2]);
unsigned long len = reader.DefineProperBufferLength();
char* finalBuffer = new char[len];
memset(finalBuffer, 0, sizeof(char)*len);
if (reader.CanReadImage()){
bool result = reader.Read(finalBuffer, len);
if( !result ){
std::cerr << "res2 failure:" << filename << std::endl;
delete [] finalBuffer;
return 1;
}
} else {
delete [] finalBuffer;
return 0; //essentially, we're going to skip this file since it can't be read by the streamer
}
/*
//now, read in smaller buffer extents
reader.DefinePixelExtent(xmin, xmax, ymin, ymax);
len = reader.DefineProperBufferLength();
char* buffer = new char[len];
bool res2 = reader.Read(buffer, len);
if( !res2 ){
std::cerr << "res2 failure:" << filename << std::endl;
return 1;
}
//copy the result into finalBuffer
memcpy(finalBuffer, buffer, len);
//now read the next half of the image
ymin = ymax;
ymax = extent[1];
reader.DefinePixelExtent(xmin, xmax, ymin, ymax);
//std::cerr << "Success to read image from file: " << filename << std::endl;
unsigned long len2 = reader.DefineProperBufferLength();
char* buffer2 = new char[len2];
bool res3 = reader.Read(buffer2, len2);
if( !res3 ){
std::cerr << "res3 failure:" << filename << std::endl;
return 1;
}
//copy the result into finalBuffer
memcpy(&(finalBuffer[len]), buffer2, len2);
delete [] buffer;
delete [] buffer2;
*/
// On big Endian system we have byteswapped the buffer (duh!)
// Since the md5sum is byte based there is now way it would detect
// that the file is written in big endian word, so comparing against
// a md5sum computed on LittleEndian would fail. Thus we need to
// byteswap (again!) here:
const char *ref = gdcm::Testing::GetMD5FromFile(filename);
const char *correct_ref = gdcm::Testing::GetMD5FromBrokenFile(filename);
char digest[33];
gdcm::Testing::ComputeMD5(finalBuffer, len, digest);
if( verbose )
{
std::cout << "ref=" << ref << std::endl;
std::cout << "md5=" << digest << std::endl;
}
if( !ref )
{
// new regression image needs a md5 sum
std::cout << "Missing md5 " << digest << " for: " << filename << std::endl;
//gdcm_assert(0);
res = 1;
}
else if( strcmp(digest, ref) != 0 )
{
// let's be nice for now and only truly fails when file is proper DICOM
if( correct_ref && !strcmp(correct_ref, ref) )
{
std::cerr << "Problem reading image from: " << filename << std::endl;
std::cerr << "Found " << digest << " instead of " << ref << std::endl;
/*
//uncomment this code to explicitly read and check the md5 hash
gdcm::ImageReader reader;
reader.SetFileName( filename );
if (reader.Read())
{
const gdcm::Image &img = reader.GetImage();
//std::cerr << "Success to read image from file: " << filename << std::endl;
unsigned long len2 = img.GetBufferLength();
char* buffer2 = new char[len];
bool res3 = img.GetBuffer(buffer2);
if (res3)
{
char digest2[33];
gdcm::Testing::ComputeMD5(buffer2, len2, digest2);
if (strcmp(digest2, digest))
{
std::cerr << "Second check read " << digest2 << " not " << digest << std::endl;
}
}
delete [] buffer2;
}
*/
res = 1;
}
#if 0
std::ofstream debug("/tmp/dump.gray",std::ios::binary);
debug.write(finalBuffer, len);
debug.close();
#endif
}
delete[] finalBuffer;
if (res == 0)
{
//uncomment this line to determine if a file was correctly read
//std::cerr << "Correctly read " << filename << std::endl;
}
return res;
}
#if 0
const gdcm::FileMetaInformation &header = reader.GetFile().GetHeader();
gdcm::MediaStorage ms = header.GetMediaStorage();
bool isImage = gdcm::MediaStorage::IsImage( ms );
if( isImage )
{
if( reader.GetFile().GetDataSet().FindDataElement( gdcm::Tag(0x7fe0,0x0010) ) )
{
std::cerr << "Failed to read image from file: " << filename << std::endl;
return 1;
}
else
{
std::cerr << "no Pixel Data Element found in the file:" << filename << std::endl;
return 0;
}
}
// else
// well this is not an image, so thankfully we fail to read it
std::cerr << "Could not read image(" << filename << "), since file is a: " << ms << std::endl;
//gdcm_assert( ms != gdcm::MediaStorage::MS_END );
return 0;
#endif
}
int TestStreamImageReader(int argc, char *argv[])
{
if( argc == 2 )
{
const char *filename = argv[1];
return TestStreamImageRead(filename, true);
}
// else
// First of get rid of warning/debug message
gdcm::Trace::DebugOff();
gdcm::Trace::WarningOff();
int r = 0, i = 0;
const char *filename;
const char * const *filenames = gdcm::Testing::GetFileNames();
while( (filename = filenames[i]) )
{
r += TestStreamImageRead( filename);
++i;
}
return r;
}