Mercurial > hg > orthanc
annotate Plugins/Samples/GdcmDecoder/GdcmDecoderCache.cpp @ 2428:dedc24644cbe
note
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Tue, 10 Oct 2017 13:23:16 +0200 |
| parents | a3a65de1840f |
| children | 878b59270859 |
| 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 |
|
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5 * Copyright (C) 2017 Osimis, Belgium |
| 1834 | 6 * |
| 7 * This program is free software: you can redistribute it and/or | |
| 8 * modify it under the terms of the GNU General Public License as | |
| 9 * published by the Free Software Foundation, either version 3 of the | |
| 10 * License, or (at your option) any later version. | |
| 11 * | |
| 12 * This program is distributed in the hope that it will be useful, but | |
| 13 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 15 * General Public License for more details. | |
| 16 * | |
| 17 * You should have received a copy of the GNU General Public License | |
| 18 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 19 **/ | |
| 20 | |
| 21 | |
| 22 #include "GdcmDecoderCache.h" | |
| 23 | |
| 24 #include "OrthancImageWrapper.h" | |
| 25 | |
| 26 namespace OrthancPlugins | |
| 27 { | |
| 28 std::string GdcmDecoderCache::ComputeMd5(OrthancPluginContext* context, | |
| 29 const void* dicom, | |
| 30 size_t size) | |
| 31 { | |
| 32 std::string result; | |
| 33 | |
| 34 char* md5 = OrthancPluginComputeMd5(context, dicom, size); | |
| 35 | |
| 36 if (md5 == NULL) | |
| 37 { | |
| 38 throw std::runtime_error("Cannot compute MD5 hash"); | |
| 39 } | |
| 40 | |
| 41 bool ok = false; | |
| 42 try | |
| 43 { | |
| 44 result.assign(md5); | |
| 45 ok = true; | |
| 46 } | |
| 47 catch (...) | |
| 48 { | |
| 49 } | |
| 50 | |
| 51 OrthancPluginFreeString(context, md5); | |
| 52 | |
| 53 if (!ok) | |
| 54 { | |
| 55 throw std::runtime_error("Not enough memory"); | |
| 56 } | |
| 57 else | |
| 58 { | |
| 59 return result; | |
| 60 } | |
| 61 } | |
| 62 | |
| 63 | |
| 1837 | 64 OrthancImageWrapper* GdcmDecoderCache::Decode(OrthancPluginContext* context, |
| 65 const void* dicom, | |
| 66 const uint32_t size, | |
| 67 uint32_t frameIndex) | |
| 1834 | 68 { |
| 69 std::string md5 = ComputeMd5(context, dicom, size); | |
| 70 | |
| 71 // First check whether the previously decoded image is the same | |
| 72 // as this one | |
| 73 { | |
| 74 boost::mutex::scoped_lock lock(mutex_); | |
| 75 | |
| 76 if (decoder_.get() != NULL && | |
| 77 size_ == size && | |
| 78 md5_ == md5) | |
| 79 { | |
| 80 // This is the same image: Reuse the previous decoding | |
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81 return new OrthancImageWrapper(context, decoder_->Decode(context, frameIndex)); |
| 1834 | 82 } |
| 83 } | |
| 84 | |
| 85 // This is not the same image | |
| 86 std::auto_ptr<GdcmImageDecoder> decoder(new GdcmImageDecoder(dicom, size)); | |
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simplification of the sample plugin
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parents:
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changeset
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87 std::auto_ptr<OrthancImageWrapper> image(new OrthancImageWrapper(context, decoder->Decode(context, frameIndex))); |
| 1834 | 88 |
| 89 { | |
| 90 // Cache the newly created decoder for further use | |
| 91 boost::mutex::scoped_lock lock(mutex_); | |
| 92 decoder_ = decoder; | |
| 93 size_ = size; | |
| 94 md5_ = md5; | |
| 95 } | |
| 96 | |
| 1837 | 97 return image.release(); |
| 1834 | 98 } |
| 99 } |