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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
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3 * Copyright (C) 2012-2015 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, Belgium
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5 *
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6 * This program is free software: you can redistribute it and/or
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7 * modify it under the terms of the GNU Affero General Public License
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8 * as published by the Free Software Foundation, either version 3 of
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9 * the License, or (at your option) any later version.
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10 *
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11 * This program is distributed in the hope that it will be useful, but
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12 * WITHOUT ANY WARRANTY; without even the implied warranty of
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 * Affero General Public License for more details.
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15 *
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16 * You should have received a copy of the GNU Affero General Public License
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17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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18 **/
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19
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20
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21 #include "JpegWriter.h"
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22
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23 #include "../Orthanc/OrthancException.h"
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24
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25 #include <jpeglib.h>
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26 #include <setjmp.h>
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27 #include <stdio.h>
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28 #include <vector>
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29 #include <string.h>
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30 #include <stdlib.h>
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31
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32 namespace OrthancPlugins
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33 {
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34 namespace
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35 {
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36 class ErrorManager
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37 {
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38 private:
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39 struct jpeg_error_mgr pub; /* "public" fields */
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40 jmp_buf setjmp_buffer; /* for return to caller */
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41 std::string message;
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42
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43 static void OutputMessage(j_common_ptr cinfo)
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44 {
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45 char message[JMSG_LENGTH_MAX];
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46 (*cinfo->err->format_message) (cinfo, message);
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47
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48 ErrorManager* that = reinterpret_cast<ErrorManager*>(cinfo->err);
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49 that->message = std::string(message);
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50 }
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51
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52
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53 static void ErrorExit(j_common_ptr cinfo)
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54 {
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55 (*cinfo->err->output_message) (cinfo);
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56
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57 ErrorManager* that = reinterpret_cast<ErrorManager*>(cinfo->err);
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58 longjmp(that->setjmp_buffer, 1);
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59 }
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60
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61
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62 public:
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63 ErrorManager()
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64 {
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65 memset(&pub, 0, sizeof(struct jpeg_error_mgr));
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66 memset(&setjmp_buffer, 0, sizeof(jmp_buf));
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67
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68 jpeg_std_error(&pub);
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69 pub.error_exit = ErrorExit;
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70 pub.output_message = OutputMessage;
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71 }
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72
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73 struct jpeg_error_mgr* GetPublic()
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74 {
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75 return &pub;
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76 }
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77
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78 jmp_buf& GetJumpBuffer()
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79 {
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80 return setjmp_buffer;
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81 }
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82
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83 const std::string& GetMessage() const
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84 {
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85 return message;
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86 }
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87 };
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88 }
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89
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90
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91 static void GetLines(std::vector<uint8_t*>& lines,
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92 unsigned int height,
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93 unsigned int pitch,
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94 Orthanc::PixelFormat format,
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95 const void* buffer)
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96 {
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97 if (format != Orthanc::PixelFormat_Grayscale8 &&
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98 format != Orthanc::PixelFormat_RGB24)
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99 {
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100 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange);
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101 }
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102
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103 lines.resize(height);
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104
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105 uint8_t* base = const_cast<uint8_t*>(reinterpret_cast<const uint8_t*>(buffer));
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106 for (unsigned int y = 0; y < height; y++)
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107 {
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108 lines[y] = base + static_cast<intptr_t>(y) * static_cast<intptr_t>(pitch);
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109 }
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110 }
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111
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112
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113 static void Compress(struct jpeg_compress_struct& cinfo,
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114 std::vector<uint8_t*>& lines,
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115 unsigned int width,
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116 unsigned int height,
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117 Orthanc::PixelFormat format,
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118 int quality)
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119 {
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120 cinfo.image_width = width;
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121 cinfo.image_height = height;
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122
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123 switch (format)
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124 {
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125 case Orthanc::PixelFormat_Grayscale8:
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126 cinfo.input_components = 1;
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127 cinfo.in_color_space = JCS_GRAYSCALE;
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128 break;
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129
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130 case Orthanc::PixelFormat_RGB24:
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131 cinfo.input_components = 3;
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132 cinfo.in_color_space = JCS_RGB;
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133 break;
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134
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135 default:
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136 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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137 }
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138
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139 jpeg_set_defaults(&cinfo);
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140 jpeg_set_quality(&cinfo, quality, TRUE);
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141 jpeg_start_compress(&cinfo, TRUE);
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142 jpeg_write_scanlines(&cinfo, &lines[0], height);
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143 jpeg_finish_compress(&cinfo);
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144 jpeg_destroy_compress(&cinfo);
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145 }
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146
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147
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148 void JpegWriter::SetQuality(uint8_t quality)
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149 {
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150 if (quality <= 0 || quality > 100)
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151 {
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152 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange);
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153 }
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154
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155 quality_ = quality;
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156 }
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157
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158
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159 void JpegWriter::WriteToFile(const char* filename,
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160 unsigned int width,
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161 unsigned int height,
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162 unsigned int pitch,
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163 Orthanc::PixelFormat format,
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164 const void* buffer)
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165 {
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166 FILE* fp = fopen(filename, "wb");
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167 if (fp == NULL)
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168 {
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169 throw Orthanc::OrthancException(Orthanc::ErrorCode_FullStorage);
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170 }
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171
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172 std::vector<uint8_t*> lines;
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173 GetLines(lines, height, pitch, format, buffer);
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174
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175 struct jpeg_compress_struct cinfo;
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176 memset(&cinfo, 0, sizeof(struct jpeg_compress_struct));
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177
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178 ErrorManager jerr;
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179 cinfo.err = jerr.GetPublic();
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180
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181 if (setjmp(jerr.GetJumpBuffer()))
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182 {
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183 /* If we get here, the JPEG code has signaled an error.
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184 * We need to clean up the JPEG object, close the input file, and return.
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185 */
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186 jpeg_destroy_compress(&cinfo);
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187 fclose(fp);
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188 throw Orthanc::OrthancException("Error during JPEG encoding: " + jerr.GetMessage());
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189 }
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190
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191 // Do not allocate data on the stack below this line!
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192
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193 jpeg_create_compress(&cinfo);
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194 jpeg_stdio_dest(&cinfo, fp);
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195 Compress(cinfo, lines, width, height, format, quality_);
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196
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197 // Everything went fine, "setjmp()" didn't get called
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198
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199 fclose(fp);
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200 }
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201
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202
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203 void JpegWriter::WriteToMemory(std::string& jpeg,
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204 unsigned int width,
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205 unsigned int height,
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206 unsigned int pitch,
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207 Orthanc::PixelFormat format,
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208 const void* buffer)
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209 {
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210 std::vector<uint8_t*> lines;
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211 GetLines(lines, height, pitch, format, buffer);
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212
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213 struct jpeg_compress_struct cinfo;
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214 memset(&cinfo, 0, sizeof(struct jpeg_compress_struct));
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215
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216 ErrorManager jerr;
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217
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218 unsigned char* data = NULL;
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219 unsigned long size;
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220
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221 if (setjmp(jerr.GetJumpBuffer()))
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222 {
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223 jpeg_destroy_compress(&cinfo);
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224
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225 if (data != NULL)
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226 {
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227 free(data);
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228 }
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229
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230 throw Orthanc::OrthancException("Error during JPEG encoding: " + jerr.GetMessage());
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231 }
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232
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233 // Do not allocate data on the stack below this line!
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234
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235 jpeg_create_compress(&cinfo);
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236 cinfo.err = jerr.GetPublic();
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237 jpeg_mem_dest(&cinfo, &data, &size);
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238
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239 Compress(cinfo, lines, width, height, format, quality_);
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240
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241 // Everything went fine, "setjmp()" didn't get called
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242
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243 jpeg.assign(reinterpret_cast<const char*>(data), size);
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244 free(data);
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245 }
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246 }
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