Image Component Library (ICL)
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00001 /******************************************************************** 00002 ** Image Component Library (ICL) ** 00003 ** ** 00004 ** Copyright (C) 2006-2013 CITEC, University of Bielefeld ** 00005 ** Neuroinformatics Group ** 00006 ** Website: www.iclcv.org and ** 00007 ** http://opensource.cit-ec.de/projects/icl ** 00008 ** ** 00009 ** File : ICLIO/src/ICLIO/ImageCompressor.h ** 00010 ** Module : ICLIO ** 00011 ** Authors: Christof Elbrechter ** 00012 ** ** 00013 ** ** 00014 ** GNU LESSER GENERAL PUBLIC LICENSE ** 00015 ** This file may be used under the terms of the GNU Lesser General ** 00016 ** Public License version 3.0 as published by the ** 00017 ** ** 00018 ** Free Software Foundation and appearing in the file LICENSE.LGPL ** 00019 ** included in the packaging of this file. Please review the ** 00020 ** following information to ensure the license requirements will ** 00021 ** be met: http://www.gnu.org/licenses/lgpl-3.0.txt ** 00022 ** ** 00023 ** The development of this software was supported by the ** 00024 ** Excellence Cluster EXC 277 Cognitive Interaction Technology. ** 00025 ** The Excellence Cluster EXC 277 is a grant of the Deutsche ** 00026 ** Forschungsgemeinschaft (DFG) in the context of the German ** 00027 ** Excellence Initiative. ** 00028 ** ** 00029 ********************************************************************/ 00030 00031 #pragma once 00032 00033 #include <ICLUtils/CompatMacros.h> 00034 #include <ICLUtils/Uncopyable.h> 00035 #include <ICLCore/Img.h> 00036 00037 namespace icl{ 00038 namespace io{ 00040 00126 class ICLIO_API ImageCompressor : public utils::Uncopyable{ 00127 struct Data; 00128 Data *m_data; 00129 00131 int estimateEncodedBufferSize(const core::ImgBase *image, bool skipMetaData); 00132 00134 int estimateRawDataSize(const core::ImgBase *image, bool skipMetaData); 00135 00136 public: 00138 struct ICLIO_API CompressionSpec{ 00139 explicit CompressionSpec(const std::string &mode=std::string(), 00140 const std::string &quality=std::string()):mode(mode),quality(quality){} 00141 std::string mode; 00142 std::string quality; 00143 }; 00144 00145 protected: 00147 struct Header{ 00148 struct Params{ 00149 char magick[4]; 00150 char compressionMode[4]; 00151 icl32s compressionQuality; 00152 icl32s width; 00153 icl32s height; 00154 icl32s roiX; 00155 icl32s roiY; 00156 icl32s roiWidth; 00157 icl32s roiHeight; 00158 icl32s channels; 00159 icl32s colorFormat; 00160 icl32s depth; 00161 icl32s dataLen; 00162 icl32s metaLen; 00163 int64_t timeStamp; 00164 } params; 00165 00166 const icl8u *data; 00167 inline const char *metaBegin() const { return (char*)(data + sizeof(Params)); } 00168 inline const icl8u *imageBegin() const { return (icl8u*)(metaBegin() + params.metaLen); } 00169 inline int imageLen() const { return params.dataLen - sizeof(Params) - params.metaLen; } 00170 inline std::string getMagickCode() const { return std::string(params.magick,params.magick+4); } 00171 inline std::string getCompressionMode() const { return std::string(params.compressionMode,params.compressionMode+4); } 00172 CompressionSpec compressionSpec() const; 00173 void setupImage(core::ImgBase **image); 00174 }; 00175 00176 00177 00179 00180 Header uncompressHeader(const icl8u *compressedData, int len); 00181 00183 Header createHeader(const core::ImgBase *image, bool skipMetaData); 00184 00185 public: 00186 00187 00189 00190 struct ICLIO_API CompressedData{ 00192 CompressedData(icl8u *bytes=0,int len=0, float compressionRatio=0, 00193 const CompressionSpec &compression=CompressionSpec()): 00194 bytes(bytes),len(len),compressionRatio(compressionRatio), 00195 compression(compression){} 00196 00198 icl8u *bytes; 00199 00201 int len; 00202 00204 float compressionRatio; 00205 00207 CompressionSpec compression; 00208 }; 00209 00211 ImageCompressor(const CompressionSpec &spec=CompressionSpec("none")); 00212 00214 ~ImageCompressor(); 00215 00217 00227 virtual void setCompression(const CompressionSpec &spec); 00228 00230 virtual CompressionSpec getCompression() const; 00231 00232 00233 00235 00236 utils::Time pickTimeStamp(const icl8u *compressedData); 00237 00239 00240 const CompressedData compress(const core::ImgBase *image, bool skipMetaData=false); 00241 00243 const core::ImgBase *uncompress(const icl8u *compressedData, int len, core::ImgBase **dst=0); 00244 }; 00245 00246 } // namespace io 00247 }