2 //-----------------------------------------------------------------------------
6 #define BITS_IN_JSAMPLE 12
9 #define GDCM_jpr_DEBUG 0
12 // BITS_IN_JSAMPLE is a compile time defined options.
13 // We need both 8 an 12;
14 // To avoid renaming *all* the Jpeg functions,
15 // we hard code the 'brain damaged liker' option.
16 // For all the functions, we shall have the 8 and 12 version
17 // (8 with the 'long' name, 12 with the 'short' name)
19 #define jpeg_read_header jReadHeader
20 #define my_error_exit myErrorExit
21 #define jpeg_destroy_decompress jDestDecompress
22 #define jpeg_stdio_src jStdSrc
23 #define jpeg_read_header jReadHeader
24 #define jpeg_read_scanlines jReadScanlines
25 #define jpeg_finish_decompress jFinDecompress
26 //#define jpeg_create_decompress jCreaDecompress //FIXME
29 #define jpeg_std_error jStdError
30 #define jpeg_CreateCompress jCreaCompress
31 #define jpeg_CreateDecompress jCreaDecompress
32 #define jpeg_destroy_compress jDestCompress
33 #define jpeg_destroy_decompress jDestDecompress
34 #define jpeg_stdio_dest jStdDest
35 #define jpeg_stdio_src jStdSrc
36 #define jpeg_set_defaults jSetDefaults
37 #define jpeg_set_colorspace jSetColorspace
38 #define jpeg_default_colorspace jDefColorspace
39 #define jpeg_set_quality jSetQuality
40 #define jpeg_set_linear_quality jSetLQuality
41 #define jpeg_add_quant_table jAddQuantTable
42 #define jpeg_quality_scaling jQualityScaling
43 #define jpeg_simple_progression jSimProgress
44 #define jpeg_suppress_tables jSuppressTables
45 #define jpeg_alloc_quant_table jAlcQTable
46 #define jpeg_alloc_huff_table jAlcHTable
47 #define jpeg_start_compress jStrtCompress
48 #define jpeg_write_scanlines jWrtScanlines
49 #define jpeg_finish_compress jFinCompress
50 #define jpeg_write_raw_data jWrtRawData
51 #define jpeg_write_marker jWrtMarker
52 #define jpeg_write_m_header jWrtMHeader
53 #define jpeg_write_m_byte jWrtMByte
54 #define jpeg_write_tables jWrtTables
55 #define jpeg_read_header jReadHeader
56 #define jpeg_start_decompress jStrtDecompress
57 #define jpeg_read_scanlines jReadScanlines
58 #define jpeg_finish_decompress jFinDecompress
59 #define jpeg_read_raw_data jReadRawData
60 #define jpeg_has_multiple_scans jHasMultScn
61 #define jpeg_start_output jStrtOutput
62 #define jpeg_finish_output jFinOutput
63 #define jpeg_input_complete jInComplete
64 #define jpeg_new_colormap jNewCMap
65 #define jpeg_consume_input jConsumeInput
66 #define jpeg_calc_output_dimensions jCalcDimensions
67 #define jpeg_save_markers jSaveMarkers
68 #define jpeg_set_marker_processor jSetMarker
69 #define jpeg_read_coefficients jReadCoefs
70 #define jpeg_write_coefficients jWrtCoefs
71 #define jpeg_copy_critical_parameters jCopyCrit
72 #define jpeg_abort_compress jAbrtCompress
73 #define jpeg_abort_decompress jAbrtDecompress
74 #define jpeg_abort jAbort
75 #define jpeg_destroy jDestroy
76 #define jpeg_resync_to_restart jResyncRestart
79 * <setjmp.h> is used for the optional error recovery mechanism shown in
80 * the second part of the example.
84 * Include file for users of JPEG library.
85 * You will need to have included system headers that define at least
86 * the typedefs FILE and size_t before you can include jpeglib.h.
87 * (stdio.h is sufficient on ANSI-conforming systems.)
88 * You may also wish to include "jerror.h".
92 #include "jpeg/libijg12/jpeglib12.h"
95 /******************** JPEG COMPRESSION SAMPLE INTERFACE *******************/
101 bool gdcm_write_JPEG_file12 (FILE *fp, void * im_buff,
102 int image_width, int image_heigh, int quality)
113 /******************** JPEG DECOMPRESSION SAMPLE INTERFACE *******************/
115 /* This half of the example shows how to read data from the JPEG decompressor.
116 * It's a bit more refined than the above, in that we show:
117 * (a) how to modify the JPEG library's standard error-reporting behavior;
118 * (b) how to allocate workspace using the library's memory manager.
120 * Just to make this example a little different from the first one, we'll
121 * assume that we do not intend to put the whole image into an in-memory
122 * buffer, but to send it line-by-line someplace else. We need a one-
123 * scanline-high JSAMPLE array as a work buffer, and we will let the JPEG
124 * memory manager allocate it for us. This approach is actually quite useful
125 * because we don't need to remember to deallocate the buffer separately: it
126 * will go away automatically when the JPEG object is cleaned up.
132 * The JPEG library's standard error handler (jerror.c) is divided into
133 * several "methods" which you can override individually. This lets you
134 * adjust the behavior without duplicating a lot of code, which you might
135 * have to update with each future release.
137 * Our example here shows how to override the "error_exit" method so that
138 * control is returned to the library's caller when a fatal error occurs,
139 * rather than calling exit() as the standard error_exit method does.
141 * We use C's setjmp/longjmp facility to return control. This means that the
142 * routine which calls the JPEG library must first execute a setjmp() call to
143 * establish the return point. We want the replacement error_exit to do a
144 * longjmp(). But we need to make the setjmp buffer accessible to the
145 * error_exit routine. To do this, we make a private extension of the
146 * standard JPEG error handler object. (If we were using C++, we'd say we
147 * were making a subclass of the regular error handler.)
149 * Here's the extended error handler struct:
152 //-----------------------------------------------------------------------------
153 struct my_error_mgr {
154 struct jpeg_error_mgr pub; /* "public" fields */
155 jmp_buf setjmp_buffer; /* for return to caller */
158 //-----------------------------------------------------------------------------
159 typedef struct my_error_mgr * my_error_ptr;
162 * Here's the routine that will replace the standard error_exit method:
164 METHODDEF(void) my_error_exit (j_common_ptr cinfo) {
165 /* cinfo->err really points to a my_error_mgr struct, so coerce pointer */
166 my_error_ptr myerr = (my_error_ptr) cinfo->err;
168 /* Always display the message. */
169 /* We could postpone this until after returning, if we chose. */
170 (*cinfo->err->output_message) (cinfo);
172 /* Return control to the setjmp point */
173 longjmp(myerr->setjmp_buffer, 1);
177 //-----------------------------------------------------------------------------
179 * Sample routine for JPEG decompression. We assume that the source file name
180 * is passed in. We want to return 1 on success, 0 on error.
185 * \brief routine for JPEG decompression
186 * @param fp pointer to an already open file descriptor
187 * 12 significant bits per pixel
188 * @param image_buffer to receive uncompressed pixels
189 * @return 1 on success, 0 on error
192 bool gdcmFile::gdcm_read_JPEG_file12 (FILE *fp,void * image_buffer) {
195 /* This struct contains the JPEG decompression parameters and pointers to
196 * working space (which is allocated as needed by the JPEG library).
198 struct jpeg_decompress_struct cinfo;
200 /* -------------- inside, we found :
201 * JDIMENSION image_width; // input image width
202 * JDIMENSION image_height; // input image height
203 * int input_components; // nb of color components in input image
204 * J_COLOR_SPACE in_color_space;// colorspace of input image
205 * double input_gamma; // image gamma of input image
208 /* We use our private extension JPEG error handler.
209 * Note that this struct must live as long as the main JPEG parameter
210 * struct, to avoid dangling-pointer problems.
212 struct my_error_mgr jerr;
215 JSAMPARRAY buffer;/* Output row buffer */
219 // typedef unsigned char JSAMPLE;
220 // typedef JSAMPLE FAR *JSAMPROW;/* ptr to one image row of pixel samples. */
221 // typedef JSAMPROW *JSAMPARRAY;/* ptr to some rows (a 2-D sample array) */
222 // typedef JSAMPARRAY *JSAMPIMAGE;/* a 3-D sample array: top index is color */
224 int row_stride;/* physical row width in output buffer */
225 #ifdef GDCM_JPG_DEBUG
226 printf("entree dans gdcmFile::gdcm_read_JPEG_file12, depuis gdcmJpeg\n");
227 #endif //GDCM_JPG_DEBUG
229 /* In this example we want to open the input file before doing anything else,
230 * so that the setjmp() error recovery below can assume the file is open.
231 * VERY IMPORTANT: use "b" option to fopen() if you are on a machine that
232 * requires it in order to read binary files.
235 /* Step 1: allocate and initialize JPEG decompression object */
236 #ifdef GDCM_JPG_DEBUG
237 printf("Entree Step 1\n");
238 #endif //GDCM_JPG_DEBUG
240 /* We set up the normal JPEG error routines, then override error_exit. */
242 cinfo.err = jpeg_std_error(&jerr.pub);
243 jerr.pub.error_exit = my_error_exit;
245 /* Establish the setjmp return context for my_error_exit to use. */
246 if (setjmp(jerr.setjmp_buffer)) {
247 /* If we get here, the JPEG code has signaled an error.
248 * We need to clean up the JPEG object, close the input file, and return.
250 jpeg_destroy_decompress(&cinfo);
254 /* Now we can initialize the JPEG decompression object. */
255 jpeg_create_decompress(&cinfo);
257 /* Step 2: specify data source (eg, a file) */
258 #ifdef GDCM_JPG_DEBUG
259 printf("Entree Step 2\n");
260 #endif //GDCM_JPG_DEBUG
261 jpeg_stdio_src(&cinfo, fp);
263 /* Step 3: read file parameters with jpeg_read_header() */
264 #ifdef GDCM_JPG_DEBUG
265 printf("Entree Step 3\n");
266 #endif //GDCM_JPG_DEBUG
267 (void) jpeg_read_header(&cinfo, TRUE);
269 /* We can ignore the return value from jpeg_read_header since
270 * (a) suspension is not possible with the stdio data source, and
271 * (b) we passed TRUE to reject a tables-only JPEG file as an error.
272 * See libjpeg.doc for more info.
275 #ifdef GDCM_JPG_DEBUG
276 printf("--------------Header contents :----------------\n");
277 printf("image_width %d image_height %d\n",
278 cinfo.image_width , cinfo.image_height);
279 printf("bits of precision in image data %d \n",
280 cinfo.output_components);
281 printf("nb of color components returned %d \n",
282 cinfo.data_precision);
283 #endif //GDCM_JPG_DEBUG
287 * JDIMENSION image_width; // input image width
288 * JDIMENSION image_height; // input image height
289 * int output_components; // # of color components returned
290 * J_COLOR_SPACE in_color_space; // colorspace of input image
291 * double input_gamma; // image gamma of input image
292 * int data_precision; // bits of precision in image data
295 /* Step 4: set parameters for decompression */
296 #ifdef GDCM_JPG_DEBUG
297 printf("Entree Step 4\n");
298 #endif //GDCM_JPG_DEBUG
300 /* In this example, we don't need to change any of the defaults set by
301 * jpeg_read_header(), so we do nothing here.
304 /* Step 5: Start decompressor */
305 #ifdef GDCM_JPG_DEBUG
306 printf("Entree Step 5\n");
307 #endif //GDCM_JPG_DEBUG
309 (void) jpeg_start_decompress(&cinfo);
310 /* We can ignore the return value since suspension is not possible
311 * with the stdio data source.
314 /* We may need to do some setup of our own at this point before reading
315 * the data. After jpeg_start_decompress() we have the correct scaled
316 * output image dimensions available, as well as the output colormap
317 * if we asked for color quantization.
318 * In this example, we need to make an output work buffer of the right size.
321 /* JSAMPLEs per row in output buffer */
322 row_stride = cinfo.output_width * cinfo.output_components;
324 #ifdef GDCM_JPG_DEBUG
325 printf ("cinfo.output_width %d cinfo.output_components %d row_stride %d\n",
326 cinfo.output_width, cinfo.output_components,row_stride);
327 #endif //GDCM_JPG_DEBUG
329 /* Make a one-row-high sample array that will go away when done with image */
330 buffer = (*cinfo.mem->alloc_sarray)
331 ((j_common_ptr) &cinfo, JPOOL_IMAGE, row_stride, 1);
333 /* Step 6: while (scan lines remain to be read) */
334 #ifdef GDCM_JPG_DEBUG
335 printf("Entree Step 6\n");
336 #endif //GDCM_JPG_DEBUG
338 /* jpeg_read_scanlines(...); */
340 /* Here we use the library's state variable cinfo.output_scanline as the
341 * loop counter, so that we don't have to keep track ourselves.
344 #ifdef GDCM_JPG_DEBUG
345 printf ("cinfo.output_height %d cinfo.output_width %d\n",
346 cinfo.output_height,cinfo.output_width);
347 #endif //GDCM_JPG_DEBUG
349 pimage=(char *)image_buffer;
351 while (cinfo.output_scanline < cinfo.output_height) {
352 /* jpeg_read_scanlines expects an array of pointers to scanlines.
353 * Here the array is only one element long, but you could ask for
354 * more than one scanline at a time if that's more convenient.
357 (void) jpeg_read_scanlines(&cinfo, buffer, 1);
359 if ( BITS_IN_JSAMPLE == 8) {
360 memcpy( pimage, buffer[0],row_stride);
363 memcpy( pimage, buffer[0],row_stride*2 ); // FIXME : *2 car 16 bits?!?
364 pimage+=row_stride*2; // FIXME : *2 car 16 bits?!?
368 /* Step 7: Finish decompression */
369 #ifdef GDCM_JPG_DEBUG
370 printf("Entree Step 7\n");
371 #endif //GDCM_JPG_DEBUG
372 (void) jpeg_finish_decompress(&cinfo);
373 /* We can ignore the return value since suspension is not possible
374 * with the stdio data source.
377 /* Step 8: Release JPEG decompression object */
378 #ifdef GDCM_JPG_DEBUG
379 printf("Entree Step 8\n");
380 #endif //GDCM_JPG_DEBUG
382 /* This is an important step since it will release a good deal of memory. */
383 jpeg_destroy_decompress(&cinfo);
385 /* After finish_decompress, we can close the input file.
386 * Here we postpone it until after no more JPEG errors are possible,
387 * so as to simplify the setjmp error logic above. (Actually, I don't
388 * think that jpeg_destroy can do an error exit, but why assume anything...)
391 /* At this point you may want to check to see whether any corrupt-data
392 * warnings occurred (test whether jerr.pub.num_warnings is nonzero).
395 /* And we're done! */
403 * In the above code, we ignored the return value of jpeg_read_scanlines,
404 * which is the number of scanlines actually read. We could get away with
405 * this because we asked for only one line at a time and we weren't using
406 * a suspending data source. See libjpeg.doc for more info.
408 * We cheated a bit by calling alloc_sarray() after jpeg_start_decompress();
409 * we should have done it beforehand to ensure that the space would be
410 * counted against the JPEG max_memory setting. In some systems the above
411 * code would risk an out-of-memory error. However, in general we don't
412 * know the output image dimensions before jpeg_start_decompress(), unless we
413 * call jpeg_calc_output_dimensions(). See libjpeg.doc for more about this.
415 * Scanlines are returned in the same order as they appear in the JPEG file,
416 * which is standardly top-to-bottom. If you must emit data bottom-to-top,
417 * you can use one of the virtual arrays provided by the JPEG memory manager
418 * to invert the data. See wrbmp.c for an example.
420 * As with compression, some operating modes may require temporary files.
421 * On some systems you may need to set up a signal handler to ensure that
422 * temporary files are deleted if the program is interrupted. See libjpeg.doc.
425 //-----------------------------------------------------------------------------