Mercurial > hg > orthanc
view Core/Images/PamReader.cpp @ 3917:04fb907dfc85 transcoding
NEWS: issue #169 was fixed by 8f7ad4989fec
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Mon, 11 May 2020 21:12:40 +0200 |
parents | 95083d2f6819 |
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/** * Orthanc - A Lightweight, RESTful DICOM Store * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics * Department, University Hospital of Liege, Belgium * Copyright (C) 2017-2020 Osimis S.A., Belgium * * 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 3 of the * License, or (at your option) any later version. * * In addition, as a special exception, the copyright holders of this * program give permission to link the code of its release with the * OpenSSL project's "OpenSSL" library (or with modified versions of it * that use the same license as the "OpenSSL" library), and distribute * the linked executables. You must obey the GNU General Public License * in all respects for all of the code used other than "OpenSSL". If you * modify file(s) with this exception, you may extend this exception to * your version of the file(s), but you are not obligated to do so. If * you do not wish to do so, delete this exception statement from your * version. If you delete this exception statement from all source files * in the program, then also delete it here. * * 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, see <http://www.gnu.org/licenses/>. **/ #include "../PrecompiledHeaders.h" #include "PamReader.h" #include "../Endianness.h" #include "../OrthancException.h" #include "../Toolbox.h" #if ORTHANC_SANDBOXED == 0 # include "../SystemToolbox.h" #endif #include <stdlib.h> // For malloc/free #include <boost/algorithm/string/find.hpp> #include <boost/lexical_cast.hpp> namespace Orthanc { static void GetPixelFormat(PixelFormat& format, unsigned int& bytesPerChannel, const unsigned int& maxValue, const unsigned int& channelCount, const std::string& tupleType) { if (tupleType == "GRAYSCALE" && channelCount == 1) { switch (maxValue) { case 255: format = PixelFormat_Grayscale8; bytesPerChannel = 1; return; case 65535: format = PixelFormat_Grayscale16; bytesPerChannel = 2; return; default: throw OrthancException(ErrorCode_NotImplemented); } } else if (tupleType == "RGB" && channelCount == 3) { switch (maxValue) { case 255: format = PixelFormat_RGB24; bytesPerChannel = 1; return; case 65535: format = PixelFormat_RGB48; bytesPerChannel = 2; return; default: throw OrthancException(ErrorCode_NotImplemented); } } else { throw OrthancException(ErrorCode_NotImplemented); } } typedef std::map<std::string, std::string> Parameters; static std::string LookupStringParameter(const Parameters& parameters, const std::string& key) { Parameters::const_iterator found = parameters.find(key); if (found == parameters.end()) { throw OrthancException(ErrorCode_BadFileFormat); } else { return found->second; } } static unsigned int LookupIntegerParameter(const Parameters& parameters, const std::string& key) { try { int value = boost::lexical_cast<int>(LookupStringParameter(parameters, key)); if (value < 0) { throw OrthancException(ErrorCode_BadFileFormat); } else { return static_cast<unsigned int>(value); } } catch (boost::bad_lexical_cast&) { throw OrthancException(ErrorCode_BadFileFormat); } } void PamReader::ParseContent() { static const std::string headerDelimiter = "ENDHDR\n"; boost::iterator_range<std::string::const_iterator> headerRange = boost::algorithm::find_first(content_, headerDelimiter); if (!headerRange) { throw OrthancException(ErrorCode_BadFileFormat); } std::string header(static_cast<const std::string&>(content_).begin(), headerRange.begin()); std::vector<std::string> lines; Toolbox::TokenizeString(lines, header, '\n'); if (lines.size() < 2 || lines.front() != "P7" || !lines.back().empty()) { throw OrthancException(ErrorCode_BadFileFormat); } Parameters parameters; for (size_t i = 1; i + 1 < lines.size(); i++) { std::vector<std::string> tokens; Toolbox::TokenizeString(tokens, lines[i], ' '); if (tokens.size() != 2) { throw OrthancException(ErrorCode_BadFileFormat); } else { parameters[tokens[0]] = tokens[1]; } } const unsigned int width = LookupIntegerParameter(parameters, "WIDTH"); const unsigned int height = LookupIntegerParameter(parameters, "HEIGHT"); const unsigned int channelCount = LookupIntegerParameter(parameters, "DEPTH"); const unsigned int maxValue = LookupIntegerParameter(parameters, "MAXVAL"); const std::string tupleType = LookupStringParameter(parameters, "TUPLTYPE"); unsigned int bytesPerChannel; PixelFormat format; GetPixelFormat(format, bytesPerChannel, maxValue, channelCount, tupleType.c_str()); unsigned int pitch = width * channelCount * bytesPerChannel; if (content_.size() != header.size() + headerDelimiter.size() + pitch * height) { throw OrthancException(ErrorCode_BadFileFormat); } size_t offset = content_.size() - pitch * height; { intptr_t bufferAddr = reinterpret_cast<intptr_t>(&content_[offset]); if((bufferAddr % 8) == 0) LOG(TRACE) << "PamReader::ParseContent() image address = " << bufferAddr; else LOG(TRACE) << "PamReader::ParseContent() image address = " << bufferAddr << " (not a multiple of 8!)"; } // if we want to enforce alignment, we need to use a freshly allocated // buffer, since we have no alignment guarantees on the original one if (enforceAligned_) { if (alignedImageBuffer_ != NULL) free(alignedImageBuffer_); alignedImageBuffer_ = malloc(pitch * height); memcpy(alignedImageBuffer_, &content_[offset], pitch* height); content_ = ""; AssignWritable(format, width, height, pitch, alignedImageBuffer_); } else { AssignWritable(format, width, height, pitch, &content_[offset]); } // Byte swapping if needed if (bytesPerChannel != 1 && bytesPerChannel != 2) { throw OrthancException(ErrorCode_NotImplemented); } if (Toolbox::DetectEndianness() == Endianness_Little && bytesPerChannel == 2) { for (unsigned int h = 0; h < height; ++h) { uint16_t* pixel = reinterpret_cast<uint16_t*>(GetRow(h)); for (unsigned int w = 0; w < GetWidth(); ++w, ++pixel) { #if ORTHANC_ENABLE_WASM == 1 /* crash (2019-08-05): Uncaught abort(alignment fault) at Error at jsStackTrace at stackTrace at abort at alignfault at SAFE_HEAP_LOAD_i32_2_2 (wasm-function[251132]:39) at __ZN7Orthanc9PamReader12ParseContentEv (wasm-function[11457]:8088) Web Assembly IS LITTLE ENDIAN! Perhaps in htobe16 ? */ uint8_t* srcdst = reinterpret_cast<uint8_t*>(pixel); uint8_t tmp = srcdst[0]; srcdst[0] = srcdst[1]; srcdst[1] = tmp; #else // memcpy() is necessary to avoid segmentation fault if the // "pixel" pointer is not 16-bit aligned (which is the case // if "offset" is an odd number). Check out issue #99: // https://bitbucket.org/sjodogne/orthanc/issues/99 uint16_t v = htobe16(*pixel); memcpy(pixel, &v, sizeof(v)); #endif } } } } #if ORTHANC_SANDBOXED == 0 void PamReader::ReadFromFile(const std::string& filename) { SystemToolbox::ReadFile(content_, filename); ParseContent(); } #endif void PamReader::ReadFromMemory(const std::string& buffer) { content_ = buffer; ParseContent(); } void PamReader::ReadFromMemory(const void* buffer, size_t size) { content_.assign(reinterpret_cast<const char*>(buffer), size); ParseContent(); } PamReader::~PamReader() { if (alignedImageBuffer_ != NULL) { free(alignedImageBuffer_); } } }