Mercurial > hg > orthanc
annotate Plugins/Samples/GdcmDecoder/GdcmDecoderCache.cpp @ 2034:07f2ba3677df
Fix of Debian bug #823139 ("orthanc: Please provide RecoverCompressedFile.cpp")
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Tue, 21 Jun 2016 12:58:25 +0200 |
| parents | b1291df2f780 |
| children | a3a65de1840f |
| rev | line source |
|---|---|
| 1834 | 1 /** |
| 2 * Orthanc - A Lightweight, RESTful DICOM Store | |
| 1900 | 3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics |
| 1834 | 4 * Department, University Hospital of Liege, Belgium |
| 5 * | |
| 6 * This program is free software: you can redistribute it and/or | |
| 7 * modify it under the terms of the GNU General Public License as | |
| 8 * published by the Free Software Foundation, either version 3 of the | |
| 9 * License, or (at your option) any later version. | |
| 10 * | |
| 11 * This program is distributed in the hope that it will be useful, but | |
| 12 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 14 * General Public License for more details. | |
| 15 * | |
| 16 * You should have received a copy of the GNU General Public License | |
| 17 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 18 **/ | |
| 19 | |
| 20 | |
| 21 #include "GdcmDecoderCache.h" | |
| 22 | |
| 23 #include "OrthancImageWrapper.h" | |
| 24 | |
| 25 namespace OrthancPlugins | |
| 26 { | |
| 27 std::string GdcmDecoderCache::ComputeMd5(OrthancPluginContext* context, | |
| 28 const void* dicom, | |
| 29 size_t size) | |
| 30 { | |
| 31 std::string result; | |
| 32 | |
| 33 char* md5 = OrthancPluginComputeMd5(context, dicom, size); | |
| 34 | |
| 35 if (md5 == NULL) | |
| 36 { | |
| 37 throw std::runtime_error("Cannot compute MD5 hash"); | |
| 38 } | |
| 39 | |
| 40 bool ok = false; | |
| 41 try | |
| 42 { | |
| 43 result.assign(md5); | |
| 44 ok = true; | |
| 45 } | |
| 46 catch (...) | |
| 47 { | |
| 48 } | |
| 49 | |
| 50 OrthancPluginFreeString(context, md5); | |
| 51 | |
| 52 if (!ok) | |
| 53 { | |
| 54 throw std::runtime_error("Not enough memory"); | |
| 55 } | |
| 56 else | |
| 57 { | |
| 58 return result; | |
| 59 } | |
| 60 } | |
| 61 | |
| 62 | |
| 1837 | 63 OrthancImageWrapper* GdcmDecoderCache::Decode(OrthancPluginContext* context, |
| 64 const void* dicom, | |
| 65 const uint32_t size, | |
| 66 uint32_t frameIndex) | |
| 1834 | 67 { |
| 68 std::string md5 = ComputeMd5(context, dicom, size); | |
| 69 | |
| 70 // First check whether the previously decoded image is the same | |
| 71 // as this one | |
| 72 { | |
| 73 boost::mutex::scoped_lock lock(mutex_); | |
| 74 | |
| 75 if (decoder_.get() != NULL && | |
| 76 size_ == size && | |
| 77 md5_ == md5) | |
| 78 { | |
| 79 // This is the same image: Reuse the previous decoding | |
|
1840
859224214616
simplification of the sample plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
1837
diff
changeset
|
80 return new OrthancImageWrapper(context, decoder_->Decode(context, frameIndex)); |
| 1834 | 81 } |
| 82 } | |
| 83 | |
| 84 // This is not the same image | |
| 85 std::auto_ptr<GdcmImageDecoder> decoder(new GdcmImageDecoder(dicom, size)); | |
|
1840
859224214616
simplification of the sample plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
1837
diff
changeset
|
86 std::auto_ptr<OrthancImageWrapper> image(new OrthancImageWrapper(context, decoder->Decode(context, frameIndex))); |
| 1834 | 87 |
| 88 { | |
| 89 // Cache the newly created decoder for further use | |
| 90 boost::mutex::scoped_lock lock(mutex_); | |
| 91 decoder_ = decoder; | |
| 92 size_ = size; | |
| 93 md5_ = md5; | |
| 94 } | |
| 95 | |
| 1837 | 96 return image.release(); |
| 1834 | 97 } |
| 98 } |