Mercurial > hg > orthanc
view Core/Images/JpegReader.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 | 94f4a18a79cc |
children |
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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 "JpegReader.h" #include "JpegErrorManager.h" #include "../OrthancException.h" #include "../Logging.h" #if ORTHANC_SANDBOXED == 0 # include "../SystemToolbox.h" #endif namespace Orthanc { static void Uncompress(struct jpeg_decompress_struct& cinfo, std::string& content, ImageAccessor& accessor) { // The "static_cast" is necessary on OS X: // https://github.com/simonfuhrmann/mve/issues/371 jpeg_read_header(&cinfo, static_cast<boolean>(true)); jpeg_start_decompress(&cinfo); PixelFormat format; if (cinfo.output_components == 1 && cinfo.out_color_space == JCS_GRAYSCALE) { format = PixelFormat_Grayscale8; } else if (cinfo.output_components == 3 && cinfo.out_color_space == JCS_RGB) { format = PixelFormat_RGB24; } else { throw OrthancException(ErrorCode_NotImplemented); } unsigned int pitch = cinfo.output_width * cinfo.output_components; /* Make a one-row-high sample array that will go away when done with image */ JSAMPARRAY buffer = (*cinfo.mem->alloc_sarray) ((j_common_ptr) &cinfo, JPOOL_IMAGE, pitch, 1); try { content.resize(pitch * cinfo.output_height); } catch (...) { throw OrthancException(ErrorCode_NotEnoughMemory); } accessor.AssignWritable(format, cinfo.output_width, cinfo.output_height, pitch, content.empty() ? NULL : &content[0]); uint8_t* target = reinterpret_cast<uint8_t*>(&content[0]); while (cinfo.output_scanline < cinfo.output_height) { jpeg_read_scanlines(&cinfo, buffer, 1); memcpy(target, buffer[0], pitch); target += pitch; } // Everything went fine, "setjmp()" didn't get called jpeg_finish_decompress(&cinfo); } #if ORTHANC_SANDBOXED == 0 void JpegReader::ReadFromFile(const std::string& filename) { FILE* fp = SystemToolbox::OpenFile(filename, FileMode_ReadBinary); if (!fp) { throw OrthancException(ErrorCode_InexistentFile); } struct jpeg_decompress_struct cinfo; memset(&cinfo, 0, sizeof(struct jpeg_decompress_struct)); Internals::JpegErrorManager jerr; cinfo.err = jerr.GetPublic(); if (setjmp(jerr.GetJumpBuffer())) { jpeg_destroy_decompress(&cinfo); fclose(fp); throw OrthancException(ErrorCode_InternalError, "Error during JPEG decoding: " + jerr.GetMessage()); } // Below this line, we are under the scope of a "setjmp" jpeg_create_decompress(&cinfo); jpeg_stdio_src(&cinfo, fp); try { Uncompress(cinfo, content_, *this); } catch (OrthancException&) { jpeg_destroy_decompress(&cinfo); fclose(fp); throw; } jpeg_destroy_decompress(&cinfo); fclose(fp); } #endif void JpegReader::ReadFromMemory(const void* buffer, size_t size) { struct jpeg_decompress_struct cinfo; memset(&cinfo, 0, sizeof(struct jpeg_decompress_struct)); Internals::JpegErrorManager jerr; cinfo.err = jerr.GetPublic(); if (setjmp(jerr.GetJumpBuffer())) { jpeg_destroy_decompress(&cinfo); throw OrthancException(ErrorCode_InternalError, "Error during JPEG decoding: " + jerr.GetMessage()); } // Below this line, we are under the scope of a "setjmp" jpeg_create_decompress(&cinfo); jpeg_mem_src(&cinfo, const_cast<unsigned char*>( reinterpret_cast<const unsigned char*>(buffer)), static_cast<unsigned long>(size)); try { Uncompress(cinfo, content_, *this); } catch (OrthancException&) { jpeg_destroy_decompress(&cinfo); throw; } jpeg_destroy_decompress(&cinfo); } void JpegReader::ReadFromMemory(const std::string& buffer) { if (buffer.empty()) { ReadFromMemory(NULL, 0); } else { ReadFromMemory(buffer.c_str(), buffer.size()); } } }