1 /*=========================================================================
4 Module: $RCSfile: gdcmJpeg.cxx,v $
6 Date: $Date: 2006/01/27 10:01:34 $
7 Version: $Revision: 1.55 $
9 Copyright (c) CREATIS (Centre de Recherche et d'Applications en Traitement de
10 l'Image). All rights reserved. See Doc/License.txt or
11 http://www.creatis.insa-lyon.fr/Public/Gdcm/License.html for details.
13 This software is distributed WITHOUT ANY WARRANTY; without even
14 the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
15 PURPOSE. See the above copyright notices for more information.
17 =========================================================================*/
18 #include "gdcmFileHelper.h"
19 #include "gdcmJPEGFragment.h"
20 #include "gdcmDebug.h"
22 #if defined(__sgi) && !defined(__GNUC__)
23 // Try to get rid of the warning:
24 //cc-3505 CC: WARNING File = /usr/include/internal/setjmp_core.h, Line = 74
25 // setjmp not marked as unknown_control_flow because it is not declared as a
28 // #pragma unknown_control_flow (setjmp)
29 # if (_COMPILER_VERSION >= 730)
30 # pragma set woff 3505
34 // Let us get rid of this funny warning on /W4:
35 // warning C4611: interaction between '_setjmp' and C++ object
36 // destruction is non-portable
37 #pragma warning( disable : 4611 )
43 #if defined(__BORLANDC__)
44 #include <mem.h> // for memset
47 #include "jdatasrc.cxx"
48 #include "jdatadst.cxx"
54 * \brief routine for JPEG decompression
55 * @param fp pointer to an already open file descriptor
56 * 8 significant bits per pixel
57 * @param im_buf Points to array (of R,G,B-order) data to compress
58 * @param quality compression quality
59 * @param image_height Number of rows in image
60 * @param image_width Number of columns in image
61 * @return 1 on success, 0 on error
64 bool gdcm_write_JPEG_file (std::ostream *fp, void *im_buf,
65 int image_width, int image_height, int quality)
68 JSAMPLE *image_buffer = (JSAMPLE*) im_buf;
70 /* This struct contains the JPEG compression parameters and pointers to
71 * working space (which is allocated as needed by the JPEG library).
72 * It is possible to have several such structures, representing multiple
73 * compression/decompression processes, in existence at once. We refer
74 * to any one struct (and its associated working data) as a "JPEG object".
76 struct jpeg_compress_struct cinfo;
77 /* This struct represents a JPEG error handler. It is declared separately
78 * because applications often want to supply a specialized error handler
79 * (see the second half of this file for an example). But here we just
80 * take the easy way out and use the standard error handler, which will
81 * print a message on stderr and call exit() if compression fails.
82 * Note that this struct must live as long as the main JPEG parameter
83 * struct, to avoid dangling-pointer problems.
85 struct jpeg_error_mgr jerr;
87 //FILE* outfile; /* target FILE* /
88 JSAMPROW row_pointer[1]; /* pointer to JSAMPLE row[s] */
89 int row_stride; /* physical row width in image buffer */
91 /* Step 1: allocate and initialize JPEG compression object */
93 /* We have to set up the error handler first, in case the initialization
94 * step fails. (Unlikely, but it could happen if you are out of memory.)
95 * This routine fills in the contents of struct jerr, and returns jerr's
96 * address which we place into the link field in cinfo.
98 cinfo.err = jpeg_std_error(&jerr);
99 /* Now we can initialize the JPEG compression object. */
100 jpeg_create_compress(&cinfo);
102 /* Step 2: specify data destination (eg, a file) */
103 /* Note: steps 2 and 3 can be done in either order. */
105 /* Here we use the library-supplied code to send compressed data to a
106 * stdio stream. You can also write your own code to do something else.
107 * VERY IMPORTANT: use "b" option to fopen() if you are on a machine that
108 * requires it in order to write binary files.
110 // if ((outfile = fopen(filename, "wb")) == NULL) {
111 // fprintf(stderr, "can't open %s\n", filename);
117 //jpeg_stdio_dest(&cinfo, fp, 0, 0, image_width, image_height, quality);
119 /* Step 3: set parameters for compression */
121 /* First we supply a description of the input image.
122 * Four fields of the cinfo struct must be filled in:
124 cinfo.image_width = image_width;/* image width and height, in pixels */
125 cinfo.image_height = image_height;
126 cinfo.input_components = 3; /* # of color components per pixel */
127 cinfo.in_color_space = JCS_RGB; /* colorspace of input image */
128 /* Now use the library's routine to set default compression parameters.
129 * (You must set at least cinfo.in_color_space before calling this,
130 * since the defaults depend on the source color space.)
132 jpeg_set_defaults(&cinfo);
133 /* Now you can set any non-default parameters you wish to.
134 * Here we just illustrate the use of quality (quantization table) scaling:
136 jpeg_set_quality(&cinfo, quality, TRUE /* limit to baseline-JPEG values */);
138 /* Step 4: Start compressor */
140 /* TRUE ensures that we will write a complete interchange-JPEG file.
141 * Pass TRUE unless you are very sure of what you're doing.
143 jpeg_start_compress(&cinfo, TRUE);
145 /* Step 5: while (scan lines remain to be written) */
146 /* jpeg_write_scanlines(...); */
148 /* Here we use the library's state variable cinfo.next_scanline as the
149 * loop counter, so that we don't have to keep track ourselves.
150 * To keep things simple, we pass one scanline per call; you can pass
151 * more if you wish, though.
153 row_stride = image_width * 3;/* JSAMPLEs per row in image_buffer */
155 while (cinfo.next_scanline < cinfo.image_height) {
156 /* jpeg_write_scanlines expects an array of pointers to scanlines.
157 * Here the array is only one element long, but you could pass
158 * more than one scanline at a time if that's more convenient.
160 row_pointer[0] = & image_buffer[cinfo.next_scanline * row_stride];
162 (void) jpeg_write_scanlines(&cinfo, row_pointer, 1);
165 /* Step 6: Finish compression */
167 jpeg_finish_compress(&cinfo);
169 /* After finish_compress, we can close the output file. */
171 // fclose(fp); --> the caller will close (multiframe treatement)
173 /* Step 7: release JPEG compression object */
175 /* This is an important step since it will release a good deal of memory. */
176 jpeg_destroy_compress(&cinfo);
178 /* And we're done! */
183 //-----------------------------------------------------------------------------
184 struct my_error_mgr {
185 struct jpeg_error_mgr pub; /* "public" fields */
186 jmp_buf setjmp_buffer; /* for return to caller */
188 typedef struct my_error_mgr* my_error_ptr;
189 //-----------------------------------------------------------------------------
192 * Here's the routine that will replace the standard error_exit method:
195 METHODDEF(void) my_error_exit (j_common_ptr cinfo) {
196 /* cinfo->err really points to a my_error_mgr struct, so coerce pointer */
197 my_error_ptr myerr = (my_error_ptr) cinfo->err;
199 /* Always display the message. */
200 /* We could postpone this until after returning, if we chose. */
201 (*cinfo->err->output_message) (cinfo);
203 /* Return control to the setjmp point */
204 longjmp(myerr->setjmp_buffer, 1);
207 //METHODDEF(void) my_output_message (j_common_ptr cinfo)
209 // char buffer[JMSG_LENGTH_MAX];
211 // /* Create the message */
212 // (*cinfo->err->format_message) (cinfo, buffer);
214 // // Custom display message, we could be more fancy and throw an exception:
215 // gdcmStaticErrorMacro( buffer );
219 //-----------------------------------------------------------------------------
222 * \brief routine for JPEG decompression
223 * @param fp pointer to an already open file descriptor
224 * 8 significant bits per pixel
225 * @param image_buffer to receive uncompressed pixels
226 * @param statesuspension Suspension State basically it should be 3 otherwise more complex to handle
227 * @return 1 on success, 0 on error
230 bool JPEGFragment::ReadJPEGFile (std::ifstream *fp, void *image_buffer, int &statesuspension)
232 pImage = (uint8_t*)image_buffer;
233 // This struct contains the JPEG decompression parameters and pointers to
234 // working space (which is allocated as needed by the JPEG library).
236 static struct jpeg_decompress_struct cinfo;
238 // -------------- inside, we found :
239 // JDIMENSION image_width; // input image width
240 // JDIMENSION image_height; // input image height
241 // int input_components; // nb of color components in input image
242 // J_COLOR_SPACE in_color_space; // colorspace of input image
243 // double input_gamma; // image gamma of input image
245 // We use our private extension JPEG error handler.
246 // Note that this struct must live as long as the main JPEG parameter
247 // struct, to avoid dangling-pointer problems.
249 struct my_error_mgr jerr;
251 JSAMPARRAY buffer;// Output row buffer
255 // typedef unsigned char JSAMPLE;
256 // typedef JSAMPLE FAR *JSAMPROW;/* ptr to one image row of pixel samples. */
257 // typedef JSAMPROW *JSAMPARRAY;/* ptr to some rows (a 2-D sample array) */
258 // typedef JSAMPARRAY *JSAMPIMAGE;/* a 3-D sample array: top index is color */
260 int row_stride;// physical row width in output buffer
262 // We set up the normal JPEG error routines, then override error_exit.
264 cinfo.err = jpeg_std_error(&jerr.pub);
265 // for any jpeg error call my_error_exit
266 jerr.pub.error_exit = my_error_exit;
267 // for any output message call my_output_message
268 //jerr.pub.output_message = my_output_message;
270 // Establish the setjmp return context for my_error_exit to use.
271 if (setjmp(jerr.setjmp_buffer))
273 // If we get here, the JPEG code has signaled an error.
274 // We need to clean up the JPEG object, close the input file, and return.
276 gdcmErrorMacro( "Serious Problem !" );
277 jpeg_destroy_decompress(&cinfo);
280 // Now we can initialize the JPEG decompression object.
281 if ( statesuspension == 0 )
283 jpeg_create_decompress(&cinfo);
284 jpeg_stdio_src(&cinfo, fp, this, 1);
288 jpeg_stdio_src(&cinfo, fp, this, 0);
290 // Step 3: read file parameters with jpeg_read_header()
292 if ( statesuspension < 2 )
294 if ( jpeg_read_header(&cinfo, TRUE) == JPEG_SUSPENDED )
296 // Suspension in jpeg_read_header
300 // Step 4: set parameters for decompression
301 // prevent the library from performing any color space conversion
302 if ( cinfo.process == JPROC_LOSSLESS )
304 cinfo.jpeg_color_space = JCS_UNKNOWN;
305 cinfo.out_color_space = JCS_UNKNOWN;
309 // Step 5: Start decompressor
310 if (statesuspension < 3 )
312 if ( jpeg_start_decompress(&cinfo) == FALSE )
314 // Suspension: jpeg_start_decompress
318 // JSAMPLEs per row in output buffer
319 row_stride = cinfo.output_width * cinfo.output_components*2;
321 // Make a one-row-high sample array that will go away when done with image
322 buffer = (*cinfo.mem->alloc_sarray)
323 ((j_common_ptr) &cinfo, JPOOL_IMAGE, row_stride, 1);
325 // Step 6: while (scan lines remain to be read)
327 // Save the buffer in case of suspension to be able to reuse it later:
332 // Suspension: re-use the buffer:
333 buffer = (JSAMPARRAY)SampBuffer;
335 int bufsize = cinfo.output_width * cinfo.output_components;
336 size_t rowsize = bufsize * sizeof(JSAMPLE);
338 while (cinfo.output_scanline < cinfo.output_height)
340 if ( jpeg_read_scanlines(&cinfo, buffer, 1) == 0 )
342 // Suspension in jpeg_read_scanlines
346 // The ijg has no notion of big endian, therefore always swap the jpeg stream
347 #if (defined(GDCM_WORDS_BIGENDIAN) || defined(GDCM_FORCE_BIGENDIAN_EMULATION)) && (CMAKE_BITS_IN_JSAMPLE != 8)
348 uint16_t *buffer16 = (uint16_t*)*buffer;
349 uint16_t *pimage16 = (uint16_t*)pImage;
350 for(unsigned int i=0;i<rowsize/2;i++)
351 pimage16[i] = (buffer16[i] >> 8) | (buffer16[i] << 8 );
353 memcpy( pImage, *buffer,rowsize);
354 #endif //GDCM_WORDS_BIGENDIAN
358 // Step 7: Finish decompression
359 if ( jpeg_finish_decompress(&cinfo) == FALSE )
361 // Suspension: jpeg_finish_decompress
365 // Step 8: Release JPEG decompression object
366 jpeg_destroy_decompress(&cinfo);
368 // At this point you may want to check to see whether any corrupt-data
369 // warnings occurred (test whether jerr.pub.num_warnings is nonzero).
375 // Put the warning back
376 #pragma warning( default : 4611 )
379 } // end namespace gdcm