diff options
Diffstat (limited to 'libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jpeglib.h')
-rw-r--r-- | libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jpeglib.h | 1160 |
1 files changed, 1160 insertions, 0 deletions
diff --git a/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jpeglib.h b/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jpeglib.h new file mode 100644 index 0000000..5fc43d8 --- /dev/null +++ b/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jpeglib.h | |||
@@ -0,0 +1,1160 @@ | |||
1 | /* | ||
2 | * jpeglib.h | ||
3 | * | ||
4 | * Copyright (C) 1991-1998, Thomas G. Lane. | ||
5 | * Modified 2002-2011 by Guido Vollbeding. | ||
6 | * This file is part of the Independent JPEG Group's software. | ||
7 | * For conditions of distribution and use, see the accompanying README file. | ||
8 | * | ||
9 | * This file defines the application interface for the JPEG library. | ||
10 | * Most applications using the library need only include this file, | ||
11 | * and perhaps jerror.h if they want to know the exact error codes. | ||
12 | */ | ||
13 | |||
14 | #ifndef JPEGLIB_H | ||
15 | #define JPEGLIB_H | ||
16 | |||
17 | /* | ||
18 | * First we include the configuration files that record how this | ||
19 | * installation of the JPEG library is set up. jconfig.h can be | ||
20 | * generated automatically for many systems. jmorecfg.h contains | ||
21 | * manual configuration options that most people need not worry about. | ||
22 | */ | ||
23 | |||
24 | #ifndef JCONFIG_INCLUDED /* in case jinclude.h already did */ | ||
25 | #include "jconfig.h" /* widely used configuration options */ | ||
26 | #endif | ||
27 | #include "jmorecfg.h" /* seldom changed options */ | ||
28 | |||
29 | |||
30 | #ifdef __cplusplus | ||
31 | #ifndef DONT_USE_EXTERN_C | ||
32 | extern "C" { | ||
33 | #endif | ||
34 | #endif | ||
35 | |||
36 | /* Version IDs for the JPEG library. | ||
37 | * Might be useful for tests like "#if JPEG_LIB_VERSION >= 80". | ||
38 | */ | ||
39 | |||
40 | #define JPEG_LIB_VERSION 80 /* Compatibility version 8.0 */ | ||
41 | #define JPEG_LIB_VERSION_MAJOR 8 | ||
42 | #define JPEG_LIB_VERSION_MINOR 4 | ||
43 | |||
44 | |||
45 | /* Various constants determining the sizes of things. | ||
46 | * All of these are specified by the JPEG standard, so don't change them | ||
47 | * if you want to be compatible. | ||
48 | */ | ||
49 | |||
50 | #define DCTSIZE 8 /* The basic DCT block is 8x8 coefficients */ | ||
51 | #define DCTSIZE2 64 /* DCTSIZE squared; # of elements in a block */ | ||
52 | #define NUM_QUANT_TBLS 4 /* Quantization tables are numbered 0..3 */ | ||
53 | #define NUM_HUFF_TBLS 4 /* Huffman tables are numbered 0..3 */ | ||
54 | #define NUM_ARITH_TBLS 16 /* Arith-coding tables are numbered 0..15 */ | ||
55 | #define MAX_COMPS_IN_SCAN 4 /* JPEG limit on # of components in one scan */ | ||
56 | #define MAX_SAMP_FACTOR 4 /* JPEG limit on sampling factors */ | ||
57 | /* Unfortunately, some bozo at Adobe saw no reason to be bound by the standard; | ||
58 | * the PostScript DCT filter can emit files with many more than 10 blocks/MCU. | ||
59 | * If you happen to run across such a file, you can up D_MAX_BLOCKS_IN_MCU | ||
60 | * to handle it. We even let you do this from the jconfig.h file. However, | ||
61 | * we strongly discourage changing C_MAX_BLOCKS_IN_MCU; just because Adobe | ||
62 | * sometimes emits noncompliant files doesn't mean you should too. | ||
63 | */ | ||
64 | #define C_MAX_BLOCKS_IN_MCU 10 /* compressor's limit on blocks per MCU */ | ||
65 | #ifndef D_MAX_BLOCKS_IN_MCU | ||
66 | #define D_MAX_BLOCKS_IN_MCU 10 /* decompressor's limit on blocks per MCU */ | ||
67 | #endif | ||
68 | |||
69 | |||
70 | /* Data structures for images (arrays of samples and of DCT coefficients). | ||
71 | * On 80x86 machines, the image arrays are too big for near pointers, | ||
72 | * but the pointer arrays can fit in near memory. | ||
73 | */ | ||
74 | |||
75 | typedef JSAMPLE FAR *JSAMPROW; /* ptr to one image row of pixel samples. */ | ||
76 | typedef JSAMPROW *JSAMPARRAY; /* ptr to some rows (a 2-D sample array) */ | ||
77 | typedef JSAMPARRAY *JSAMPIMAGE; /* a 3-D sample array: top index is color */ | ||
78 | |||
79 | typedef JCOEF JBLOCK[DCTSIZE2]; /* one block of coefficients */ | ||
80 | typedef JBLOCK FAR *JBLOCKROW; /* pointer to one row of coefficient blocks */ | ||
81 | typedef JBLOCKROW *JBLOCKARRAY; /* a 2-D array of coefficient blocks */ | ||
82 | typedef JBLOCKARRAY *JBLOCKIMAGE; /* a 3-D array of coefficient blocks */ | ||
83 | |||
84 | typedef JCOEF FAR *JCOEFPTR; /* useful in a couple of places */ | ||
85 | |||
86 | |||
87 | /* Types for JPEG compression parameters and working tables. */ | ||
88 | |||
89 | |||
90 | /* DCT coefficient quantization tables. */ | ||
91 | |||
92 | typedef struct { | ||
93 | /* This array gives the coefficient quantizers in natural array order | ||
94 | * (not the zigzag order in which they are stored in a JPEG DQT marker). | ||
95 | * CAUTION: IJG versions prior to v6a kept this array in zigzag order. | ||
96 | */ | ||
97 | UINT16 quantval[DCTSIZE2]; /* quantization step for each coefficient */ | ||
98 | /* This field is used only during compression. It's initialized FALSE when | ||
99 | * the table is created, and set TRUE when it's been output to the file. | ||
100 | * You could suppress output of a table by setting this to TRUE. | ||
101 | * (See jpeg_suppress_tables for an example.) | ||
102 | */ | ||
103 | boolean sent_table; /* TRUE when table has been output */ | ||
104 | } JQUANT_TBL; | ||
105 | |||
106 | |||
107 | /* Huffman coding tables. */ | ||
108 | |||
109 | typedef struct { | ||
110 | /* These two fields directly represent the contents of a JPEG DHT marker */ | ||
111 | UINT8 bits[17]; /* bits[k] = # of symbols with codes of */ | ||
112 | /* length k bits; bits[0] is unused */ | ||
113 | UINT8 huffval[256]; /* The symbols, in order of incr code length */ | ||
114 | /* This field is used only during compression. It's initialized FALSE when | ||
115 | * the table is created, and set TRUE when it's been output to the file. | ||
116 | * You could suppress output of a table by setting this to TRUE. | ||
117 | * (See jpeg_suppress_tables for an example.) | ||
118 | */ | ||
119 | boolean sent_table; /* TRUE when table has been output */ | ||
120 | } JHUFF_TBL; | ||
121 | |||
122 | |||
123 | /* Basic info about one component (color channel). */ | ||
124 | |||
125 | typedef struct { | ||
126 | /* These values are fixed over the whole image. */ | ||
127 | /* For compression, they must be supplied by parameter setup; */ | ||
128 | /* for decompression, they are read from the SOF marker. */ | ||
129 | int component_id; /* identifier for this component (0..255) */ | ||
130 | int component_index; /* its index in SOF or cinfo->comp_info[] */ | ||
131 | int h_samp_factor; /* horizontal sampling factor (1..4) */ | ||
132 | int v_samp_factor; /* vertical sampling factor (1..4) */ | ||
133 | int quant_tbl_no; /* quantization table selector (0..3) */ | ||
134 | /* These values may vary between scans. */ | ||
135 | /* For compression, they must be supplied by parameter setup; */ | ||
136 | /* for decompression, they are read from the SOS marker. */ | ||
137 | /* The decompressor output side may not use these variables. */ | ||
138 | int dc_tbl_no; /* DC entropy table selector (0..3) */ | ||
139 | int ac_tbl_no; /* AC entropy table selector (0..3) */ | ||
140 | |||
141 | /* Remaining fields should be treated as private by applications. */ | ||
142 | |||
143 | /* These values are computed during compression or decompression startup: */ | ||
144 | /* Component's size in DCT blocks. | ||
145 | * Any dummy blocks added to complete an MCU are not counted; therefore | ||
146 | * these values do not depend on whether a scan is interleaved or not. | ||
147 | */ | ||
148 | JDIMENSION width_in_blocks; | ||
149 | JDIMENSION height_in_blocks; | ||
150 | /* Size of a DCT block in samples, | ||
151 | * reflecting any scaling we choose to apply during the DCT step. | ||
152 | * Values from 1 to 16 are supported. | ||
153 | * Note that different components may receive different DCT scalings. | ||
154 | */ | ||
155 | int DCT_h_scaled_size; | ||
156 | int DCT_v_scaled_size; | ||
157 | /* The downsampled dimensions are the component's actual, unpadded number | ||
158 | * of samples at the main buffer (preprocessing/compression interface); | ||
159 | * DCT scaling is included, so | ||
160 | * downsampled_width = ceil(image_width * Hi/Hmax * DCT_h_scaled_size/DCTSIZE) | ||
161 | * and similarly for height. | ||
162 | */ | ||
163 | JDIMENSION downsampled_width; /* actual width in samples */ | ||
164 | JDIMENSION downsampled_height; /* actual height in samples */ | ||
165 | /* This flag is used only for decompression. In cases where some of the | ||
166 | * components will be ignored (eg grayscale output from YCbCr image), | ||
167 | * we can skip most computations for the unused components. | ||
168 | */ | ||
169 | boolean component_needed; /* do we need the value of this component? */ | ||
170 | |||
171 | /* These values are computed before starting a scan of the component. */ | ||
172 | /* The decompressor output side may not use these variables. */ | ||
173 | int MCU_width; /* number of blocks per MCU, horizontally */ | ||
174 | int MCU_height; /* number of blocks per MCU, vertically */ | ||
175 | int MCU_blocks; /* MCU_width * MCU_height */ | ||
176 | int MCU_sample_width; /* MCU width in samples: MCU_width * DCT_h_scaled_size */ | ||
177 | int last_col_width; /* # of non-dummy blocks across in last MCU */ | ||
178 | int last_row_height; /* # of non-dummy blocks down in last MCU */ | ||
179 | |||
180 | /* Saved quantization table for component; NULL if none yet saved. | ||
181 | * See jdinput.c comments about the need for this information. | ||
182 | * This field is currently used only for decompression. | ||
183 | */ | ||
184 | JQUANT_TBL * quant_table; | ||
185 | |||
186 | /* Private per-component storage for DCT or IDCT subsystem. */ | ||
187 | void * dct_table; | ||
188 | } jpeg_component_info; | ||
189 | |||
190 | |||
191 | /* The script for encoding a multiple-scan file is an array of these: */ | ||
192 | |||
193 | typedef struct { | ||
194 | int comps_in_scan; /* number of components encoded in this scan */ | ||
195 | int component_index[MAX_COMPS_IN_SCAN]; /* their SOF/comp_info[] indexes */ | ||
196 | int Ss, Se; /* progressive JPEG spectral selection parms */ | ||
197 | int Ah, Al; /* progressive JPEG successive approx. parms */ | ||
198 | } jpeg_scan_info; | ||
199 | |||
200 | /* The decompressor can save APPn and COM markers in a list of these: */ | ||
201 | |||
202 | typedef struct jpeg_marker_struct FAR * jpeg_saved_marker_ptr; | ||
203 | |||
204 | struct jpeg_marker_struct { | ||
205 | jpeg_saved_marker_ptr next; /* next in list, or NULL */ | ||
206 | UINT8 marker; /* marker code: JPEG_COM, or JPEG_APP0+n */ | ||
207 | unsigned int original_length; /* # bytes of data in the file */ | ||
208 | unsigned int data_length; /* # bytes of data saved at data[] */ | ||
209 | JOCTET FAR * data; /* the data contained in the marker */ | ||
210 | /* the marker length word is not counted in data_length or original_length */ | ||
211 | }; | ||
212 | |||
213 | /* Known color spaces. */ | ||
214 | |||
215 | typedef enum { | ||
216 | JCS_UNKNOWN, /* error/unspecified */ | ||
217 | JCS_GRAYSCALE, /* monochrome */ | ||
218 | JCS_RGB, /* red/green/blue */ | ||
219 | JCS_YCbCr, /* Y/Cb/Cr (also known as YUV) */ | ||
220 | JCS_CMYK, /* C/M/Y/K */ | ||
221 | JCS_YCCK /* Y/Cb/Cr/K */ | ||
222 | } J_COLOR_SPACE; | ||
223 | |||
224 | /* DCT/IDCT algorithm options. */ | ||
225 | |||
226 | typedef enum { | ||
227 | JDCT_ISLOW, /* slow but accurate integer algorithm */ | ||
228 | JDCT_IFAST, /* faster, less accurate integer method */ | ||
229 | JDCT_FLOAT /* floating-point: accurate, fast on fast HW */ | ||
230 | } J_DCT_METHOD; | ||
231 | |||
232 | #ifndef JDCT_DEFAULT /* may be overridden in jconfig.h */ | ||
233 | #define JDCT_DEFAULT JDCT_ISLOW | ||
234 | #endif | ||
235 | #ifndef JDCT_FASTEST /* may be overridden in jconfig.h */ | ||
236 | #define JDCT_FASTEST JDCT_IFAST | ||
237 | #endif | ||
238 | |||
239 | /* Dithering options for decompression. */ | ||
240 | |||
241 | typedef enum { | ||
242 | JDITHER_NONE, /* no dithering */ | ||
243 | JDITHER_ORDERED, /* simple ordered dither */ | ||
244 | JDITHER_FS /* Floyd-Steinberg error diffusion dither */ | ||
245 | } J_DITHER_MODE; | ||
246 | |||
247 | |||
248 | /* Common fields between JPEG compression and decompression master structs. */ | ||
249 | |||
250 | #define jpeg_common_fields \ | ||
251 | struct jpeg_error_mgr * err; /* Error handler module */\ | ||
252 | struct jpeg_memory_mgr * mem; /* Memory manager module */\ | ||
253 | struct jpeg_progress_mgr * progress; /* Progress monitor, or NULL if none */\ | ||
254 | void * client_data; /* Available for use by application */\ | ||
255 | boolean is_decompressor; /* So common code can tell which is which */\ | ||
256 | int global_state /* For checking call sequence validity */ | ||
257 | |||
258 | /* Routines that are to be used by both halves of the library are declared | ||
259 | * to receive a pointer to this structure. There are no actual instances of | ||
260 | * jpeg_common_struct, only of jpeg_compress_struct and jpeg_decompress_struct. | ||
261 | */ | ||
262 | struct jpeg_common_struct { | ||
263 | jpeg_common_fields; /* Fields common to both master struct types */ | ||
264 | /* Additional fields follow in an actual jpeg_compress_struct or | ||
265 | * jpeg_decompress_struct. All three structs must agree on these | ||
266 | * initial fields! (This would be a lot cleaner in C++.) | ||
267 | */ | ||
268 | }; | ||
269 | |||
270 | typedef struct jpeg_common_struct * j_common_ptr; | ||
271 | typedef struct jpeg_compress_struct * j_compress_ptr; | ||
272 | typedef struct jpeg_decompress_struct * j_decompress_ptr; | ||
273 | |||
274 | |||
275 | /* Master record for a compression instance */ | ||
276 | |||
277 | struct jpeg_compress_struct { | ||
278 | jpeg_common_fields; /* Fields shared with jpeg_decompress_struct */ | ||
279 | |||
280 | /* Destination for compressed data */ | ||
281 | struct jpeg_destination_mgr * dest; | ||
282 | |||
283 | /* Description of source image --- these fields must be filled in by | ||
284 | * outer application before starting compression. in_color_space must | ||
285 | * be correct before you can even call jpeg_set_defaults(). | ||
286 | */ | ||
287 | |||
288 | JDIMENSION image_width; /* input image width */ | ||
289 | JDIMENSION image_height; /* input image height */ | ||
290 | int input_components; /* # of color components in input image */ | ||
291 | J_COLOR_SPACE in_color_space; /* colorspace of input image */ | ||
292 | |||
293 | double input_gamma; /* image gamma of input image */ | ||
294 | |||
295 | /* Compression parameters --- these fields must be set before calling | ||
296 | * jpeg_start_compress(). We recommend calling jpeg_set_defaults() to | ||
297 | * initialize everything to reasonable defaults, then changing anything | ||
298 | * the application specifically wants to change. That way you won't get | ||
299 | * burnt when new parameters are added. Also note that there are several | ||
300 | * helper routines to simplify changing parameters. | ||
301 | */ | ||
302 | |||
303 | unsigned int scale_num, scale_denom; /* fraction by which to scale image */ | ||
304 | |||
305 | JDIMENSION jpeg_width; /* scaled JPEG image width */ | ||
306 | JDIMENSION jpeg_height; /* scaled JPEG image height */ | ||
307 | /* Dimensions of actual JPEG image that will be written to file, | ||
308 | * derived from input dimensions by scaling factors above. | ||
309 | * These fields are computed by jpeg_start_compress(). | ||
310 | * You can also use jpeg_calc_jpeg_dimensions() to determine these values | ||
311 | * in advance of calling jpeg_start_compress(). | ||
312 | */ | ||
313 | |||
314 | int data_precision; /* bits of precision in image data */ | ||
315 | |||
316 | int num_components; /* # of color components in JPEG image */ | ||
317 | J_COLOR_SPACE jpeg_color_space; /* colorspace of JPEG image */ | ||
318 | |||
319 | jpeg_component_info * comp_info; | ||
320 | /* comp_info[i] describes component that appears i'th in SOF */ | ||
321 | |||
322 | JQUANT_TBL * quant_tbl_ptrs[NUM_QUANT_TBLS]; | ||
323 | int q_scale_factor[NUM_QUANT_TBLS]; | ||
324 | /* ptrs to coefficient quantization tables, or NULL if not defined, | ||
325 | * and corresponding scale factors (percentage, initialized 100). | ||
326 | */ | ||
327 | |||
328 | JHUFF_TBL * dc_huff_tbl_ptrs[NUM_HUFF_TBLS]; | ||
329 | JHUFF_TBL * ac_huff_tbl_ptrs[NUM_HUFF_TBLS]; | ||
330 | /* ptrs to Huffman coding tables, or NULL if not defined */ | ||
331 | |||
332 | UINT8 arith_dc_L[NUM_ARITH_TBLS]; /* L values for DC arith-coding tables */ | ||
333 | UINT8 arith_dc_U[NUM_ARITH_TBLS]; /* U values for DC arith-coding tables */ | ||
334 | UINT8 arith_ac_K[NUM_ARITH_TBLS]; /* Kx values for AC arith-coding tables */ | ||
335 | |||
336 | int num_scans; /* # of entries in scan_info array */ | ||
337 | const jpeg_scan_info * scan_info; /* script for multi-scan file, or NULL */ | ||
338 | /* The default value of scan_info is NULL, which causes a single-scan | ||
339 | * sequential JPEG file to be emitted. To create a multi-scan file, | ||
340 | * set num_scans and scan_info to point to an array of scan definitions. | ||
341 | */ | ||
342 | |||
343 | boolean raw_data_in; /* TRUE=caller supplies downsampled data */ | ||
344 | boolean arith_code; /* TRUE=arithmetic coding, FALSE=Huffman */ | ||
345 | boolean optimize_coding; /* TRUE=optimize entropy encoding parms */ | ||
346 | boolean CCIR601_sampling; /* TRUE=first samples are cosited */ | ||
347 | boolean do_fancy_downsampling; /* TRUE=apply fancy downsampling */ | ||
348 | int smoothing_factor; /* 1..100, or 0 for no input smoothing */ | ||
349 | J_DCT_METHOD dct_method; /* DCT algorithm selector */ | ||
350 | |||
351 | /* The restart interval can be specified in absolute MCUs by setting | ||
352 | * restart_interval, or in MCU rows by setting restart_in_rows | ||
353 | * (in which case the correct restart_interval will be figured | ||
354 | * for each scan). | ||
355 | */ | ||
356 | unsigned int restart_interval; /* MCUs per restart, or 0 for no restart */ | ||
357 | int restart_in_rows; /* if > 0, MCU rows per restart interval */ | ||
358 | |||
359 | /* Parameters controlling emission of special markers. */ | ||
360 | |||
361 | boolean write_JFIF_header; /* should a JFIF marker be written? */ | ||
362 | UINT8 JFIF_major_version; /* What to write for the JFIF version number */ | ||
363 | UINT8 JFIF_minor_version; | ||
364 | /* These three values are not used by the JPEG code, merely copied */ | ||
365 | /* into the JFIF APP0 marker. density_unit can be 0 for unknown, */ | ||
366 | /* 1 for dots/inch, or 2 for dots/cm. Note that the pixel aspect */ | ||
367 | /* ratio is defined by X_density/Y_density even when density_unit=0. */ | ||
368 | UINT8 density_unit; /* JFIF code for pixel size units */ | ||
369 | UINT16 X_density; /* Horizontal pixel density */ | ||
370 | UINT16 Y_density; /* Vertical pixel density */ | ||
371 | boolean write_Adobe_marker; /* should an Adobe marker be written? */ | ||
372 | |||
373 | /* State variable: index of next scanline to be written to | ||
374 | * jpeg_write_scanlines(). Application may use this to control its | ||
375 | * processing loop, e.g., "while (next_scanline < image_height)". | ||
376 | */ | ||
377 | |||
378 | JDIMENSION next_scanline; /* 0 .. image_height-1 */ | ||
379 | |||
380 | /* Remaining fields are known throughout compressor, but generally | ||
381 | * should not be touched by a surrounding application. | ||
382 | */ | ||
383 | |||
384 | /* | ||
385 | * These fields are computed during compression startup | ||
386 | */ | ||
387 | boolean progressive_mode; /* TRUE if scan script uses progressive mode */ | ||
388 | int max_h_samp_factor; /* largest h_samp_factor */ | ||
389 | int max_v_samp_factor; /* largest v_samp_factor */ | ||
390 | |||
391 | int min_DCT_h_scaled_size; /* smallest DCT_h_scaled_size of any component */ | ||
392 | int min_DCT_v_scaled_size; /* smallest DCT_v_scaled_size of any component */ | ||
393 | |||
394 | JDIMENSION total_iMCU_rows; /* # of iMCU rows to be input to coef ctlr */ | ||
395 | /* The coefficient controller receives data in units of MCU rows as defined | ||
396 | * for fully interleaved scans (whether the JPEG file is interleaved or not). | ||
397 | * There are v_samp_factor * DCTSIZE sample rows of each component in an | ||
398 | * "iMCU" (interleaved MCU) row. | ||
399 | */ | ||
400 | |||
401 | /* | ||
402 | * These fields are valid during any one scan. | ||
403 | * They describe the components and MCUs actually appearing in the scan. | ||
404 | */ | ||
405 | int comps_in_scan; /* # of JPEG components in this scan */ | ||
406 | jpeg_component_info * cur_comp_info[MAX_COMPS_IN_SCAN]; | ||
407 | /* *cur_comp_info[i] describes component that appears i'th in SOS */ | ||
408 | |||
409 | JDIMENSION MCUs_per_row; /* # of MCUs across the image */ | ||
410 | JDIMENSION MCU_rows_in_scan; /* # of MCU rows in the image */ | ||
411 | |||
412 | int blocks_in_MCU; /* # of DCT blocks per MCU */ | ||
413 | int MCU_membership[C_MAX_BLOCKS_IN_MCU]; | ||
414 | /* MCU_membership[i] is index in cur_comp_info of component owning */ | ||
415 | /* i'th block in an MCU */ | ||
416 | |||
417 | int Ss, Se, Ah, Al; /* progressive JPEG parameters for scan */ | ||
418 | |||
419 | int block_size; /* the basic DCT block size: 1..16 */ | ||
420 | const int * natural_order; /* natural-order position array */ | ||
421 | int lim_Se; /* min( Se, DCTSIZE2-1 ) */ | ||
422 | |||
423 | /* | ||
424 | * Links to compression subobjects (methods and private variables of modules) | ||
425 | */ | ||
426 | struct jpeg_comp_master * master; | ||
427 | struct jpeg_c_main_controller * main; | ||
428 | struct jpeg_c_prep_controller * prep; | ||
429 | struct jpeg_c_coef_controller * coef; | ||
430 | struct jpeg_marker_writer * marker; | ||
431 | struct jpeg_color_converter * cconvert; | ||
432 | struct jpeg_downsampler * downsample; | ||
433 | struct jpeg_forward_dct * fdct; | ||
434 | struct jpeg_entropy_encoder * entropy; | ||
435 | jpeg_scan_info * script_space; /* workspace for jpeg_simple_progression */ | ||
436 | int script_space_size; | ||
437 | }; | ||
438 | |||
439 | |||
440 | /* Master record for a decompression instance */ | ||
441 | |||
442 | struct jpeg_decompress_struct { | ||
443 | jpeg_common_fields; /* Fields shared with jpeg_compress_struct */ | ||
444 | |||
445 | /* Source of compressed data */ | ||
446 | struct jpeg_source_mgr * src; | ||
447 | |||
448 | /* Basic description of image --- filled in by jpeg_read_header(). */ | ||
449 | /* Application may inspect these values to decide how to process image. */ | ||
450 | |||
451 | JDIMENSION image_width; /* nominal image width (from SOF marker) */ | ||
452 | JDIMENSION image_height; /* nominal image height */ | ||
453 | int num_components; /* # of color components in JPEG image */ | ||
454 | J_COLOR_SPACE jpeg_color_space; /* colorspace of JPEG image */ | ||
455 | |||
456 | /* Decompression processing parameters --- these fields must be set before | ||
457 | * calling jpeg_start_decompress(). Note that jpeg_read_header() initializes | ||
458 | * them to default values. | ||
459 | */ | ||
460 | |||
461 | J_COLOR_SPACE out_color_space; /* colorspace for output */ | ||
462 | |||
463 | unsigned int scale_num, scale_denom; /* fraction by which to scale image */ | ||
464 | |||
465 | double output_gamma; /* image gamma wanted in output */ | ||
466 | |||
467 | boolean buffered_image; /* TRUE=multiple output passes */ | ||
468 | boolean raw_data_out; /* TRUE=downsampled data wanted */ | ||
469 | |||
470 | J_DCT_METHOD dct_method; /* IDCT algorithm selector */ | ||
471 | boolean do_fancy_upsampling; /* TRUE=apply fancy upsampling */ | ||
472 | boolean do_block_smoothing; /* TRUE=apply interblock smoothing */ | ||
473 | |||
474 | boolean quantize_colors; /* TRUE=colormapped output wanted */ | ||
475 | /* the following are ignored if not quantize_colors: */ | ||
476 | J_DITHER_MODE dither_mode; /* type of color dithering to use */ | ||
477 | boolean two_pass_quantize; /* TRUE=use two-pass color quantization */ | ||
478 | int desired_number_of_colors; /* max # colors to use in created colormap */ | ||
479 | /* these are significant only in buffered-image mode: */ | ||
480 | boolean enable_1pass_quant; /* enable future use of 1-pass quantizer */ | ||
481 | boolean enable_external_quant;/* enable future use of external colormap */ | ||
482 | boolean enable_2pass_quant; /* enable future use of 2-pass quantizer */ | ||
483 | |||
484 | /* Description of actual output image that will be returned to application. | ||
485 | * These fields are computed by jpeg_start_decompress(). | ||
486 | * You can also use jpeg_calc_output_dimensions() to determine these values | ||
487 | * in advance of calling jpeg_start_decompress(). | ||
488 | */ | ||
489 | |||
490 | JDIMENSION output_width; /* scaled image width */ | ||
491 | JDIMENSION output_height; /* scaled image height */ | ||
492 | int out_color_components; /* # of color components in out_color_space */ | ||
493 | int output_components; /* # of color components returned */ | ||
494 | /* output_components is 1 (a colormap index) when quantizing colors; | ||
495 | * otherwise it equals out_color_components. | ||
496 | */ | ||
497 | int rec_outbuf_height; /* min recommended height of scanline buffer */ | ||
498 | /* If the buffer passed to jpeg_read_scanlines() is less than this many rows | ||
499 | * high, space and time will be wasted due to unnecessary data copying. | ||
500 | * Usually rec_outbuf_height will be 1 or 2, at most 4. | ||
501 | */ | ||
502 | |||
503 | /* When quantizing colors, the output colormap is described by these fields. | ||
504 | * The application can supply a colormap by setting colormap non-NULL before | ||
505 | * calling jpeg_start_decompress; otherwise a colormap is created during | ||
506 | * jpeg_start_decompress or jpeg_start_output. | ||
507 | * The map has out_color_components rows and actual_number_of_colors columns. | ||
508 | */ | ||
509 | int actual_number_of_colors; /* number of entries in use */ | ||
510 | JSAMPARRAY colormap; /* The color map as a 2-D pixel array */ | ||
511 | |||
512 | /* State variables: these variables indicate the progress of decompression. | ||
513 | * The application may examine these but must not modify them. | ||
514 | */ | ||
515 | |||
516 | /* Row index of next scanline to be read from jpeg_read_scanlines(). | ||
517 | * Application may use this to control its processing loop, e.g., | ||
518 | * "while (output_scanline < output_height)". | ||
519 | */ | ||
520 | JDIMENSION output_scanline; /* 0 .. output_height-1 */ | ||
521 | |||
522 | /* Current input scan number and number of iMCU rows completed in scan. | ||
523 | * These indicate the progress of the decompressor input side. | ||
524 | */ | ||
525 | int input_scan_number; /* Number of SOS markers seen so far */ | ||
526 | JDIMENSION input_iMCU_row; /* Number of iMCU rows completed */ | ||
527 | |||
528 | /* The "output scan number" is the notional scan being displayed by the | ||
529 | * output side. The decompressor will not allow output scan/row number | ||
530 | * to get ahead of input scan/row, but it can fall arbitrarily far behind. | ||
531 | */ | ||
532 | int output_scan_number; /* Nominal scan number being displayed */ | ||
533 | JDIMENSION output_iMCU_row; /* Number of iMCU rows read */ | ||
534 | |||
535 | /* Current progression status. coef_bits[c][i] indicates the precision | ||
536 | * with which component c's DCT coefficient i (in zigzag order) is known. | ||
537 | * It is -1 when no data has yet been received, otherwise it is the point | ||
538 | * transform (shift) value for the most recent scan of the coefficient | ||
539 | * (thus, 0 at completion of the progression). | ||
540 | * This pointer is NULL when reading a non-progressive file. | ||
541 | */ | ||
542 | int (*coef_bits)[DCTSIZE2]; /* -1 or current Al value for each coef */ | ||
543 | |||
544 | /* Internal JPEG parameters --- the application usually need not look at | ||
545 | * these fields. Note that the decompressor output side may not use | ||
546 | * any parameters that can change between scans. | ||
547 | */ | ||
548 | |||
549 | /* Quantization and Huffman tables are carried forward across input | ||
550 | * datastreams when processing abbreviated JPEG datastreams. | ||
551 | */ | ||
552 | |||
553 | JQUANT_TBL * quant_tbl_ptrs[NUM_QUANT_TBLS]; | ||
554 | /* ptrs to coefficient quantization tables, or NULL if not defined */ | ||
555 | |||
556 | JHUFF_TBL * dc_huff_tbl_ptrs[NUM_HUFF_TBLS]; | ||
557 | JHUFF_TBL * ac_huff_tbl_ptrs[NUM_HUFF_TBLS]; | ||
558 | /* ptrs to Huffman coding tables, or NULL if not defined */ | ||
559 | |||
560 | /* These parameters are never carried across datastreams, since they | ||
561 | * are given in SOF/SOS markers or defined to be reset by SOI. | ||
562 | */ | ||
563 | |||
564 | int data_precision; /* bits of precision in image data */ | ||
565 | |||
566 | jpeg_component_info * comp_info; | ||
567 | /* comp_info[i] describes component that appears i'th in SOF */ | ||
568 | |||
569 | boolean is_baseline; /* TRUE if Baseline SOF0 encountered */ | ||
570 | boolean progressive_mode; /* TRUE if SOFn specifies progressive mode */ | ||
571 | boolean arith_code; /* TRUE=arithmetic coding, FALSE=Huffman */ | ||
572 | |||
573 | UINT8 arith_dc_L[NUM_ARITH_TBLS]; /* L values for DC arith-coding tables */ | ||
574 | UINT8 arith_dc_U[NUM_ARITH_TBLS]; /* U values for DC arith-coding tables */ | ||
575 | UINT8 arith_ac_K[NUM_ARITH_TBLS]; /* Kx values for AC arith-coding tables */ | ||
576 | |||
577 | unsigned int restart_interval; /* MCUs per restart interval, or 0 for no restart */ | ||
578 | |||
579 | /* These fields record data obtained from optional markers recognized by | ||
580 | * the JPEG library. | ||
581 | */ | ||
582 | boolean saw_JFIF_marker; /* TRUE iff a JFIF APP0 marker was found */ | ||
583 | /* Data copied from JFIF marker; only valid if saw_JFIF_marker is TRUE: */ | ||
584 | UINT8 JFIF_major_version; /* JFIF version number */ | ||
585 | UINT8 JFIF_minor_version; | ||
586 | UINT8 density_unit; /* JFIF code for pixel size units */ | ||
587 | UINT16 X_density; /* Horizontal pixel density */ | ||
588 | UINT16 Y_density; /* Vertical pixel density */ | ||
589 | boolean saw_Adobe_marker; /* TRUE iff an Adobe APP14 marker was found */ | ||
590 | UINT8 Adobe_transform; /* Color transform code from Adobe marker */ | ||
591 | |||
592 | boolean CCIR601_sampling; /* TRUE=first samples are cosited */ | ||
593 | |||
594 | /* Aside from the specific data retained from APPn markers known to the | ||
595 | * library, the uninterpreted contents of any or all APPn and COM markers | ||
596 | * can be saved in a list for examination by the application. | ||
597 | */ | ||
598 | jpeg_saved_marker_ptr marker_list; /* Head of list of saved markers */ | ||
599 | |||
600 | /* Remaining fields are known throughout decompressor, but generally | ||
601 | * should not be touched by a surrounding application. | ||
602 | */ | ||
603 | |||
604 | /* | ||
605 | * These fields are computed during decompression startup | ||
606 | */ | ||
607 | int max_h_samp_factor; /* largest h_samp_factor */ | ||
608 | int max_v_samp_factor; /* largest v_samp_factor */ | ||
609 | |||
610 | int min_DCT_h_scaled_size; /* smallest DCT_h_scaled_size of any component */ | ||
611 | int min_DCT_v_scaled_size; /* smallest DCT_v_scaled_size of any component */ | ||
612 | |||
613 | JDIMENSION total_iMCU_rows; /* # of iMCU rows in image */ | ||
614 | /* The coefficient controller's input and output progress is measured in | ||
615 | * units of "iMCU" (interleaved MCU) rows. These are the same as MCU rows | ||
616 | * in fully interleaved JPEG scans, but are used whether the scan is | ||
617 | * interleaved or not. We define an iMCU row as v_samp_factor DCT block | ||
618 | * rows of each component. Therefore, the IDCT output contains | ||
619 | * v_samp_factor*DCT_v_scaled_size sample rows of a component per iMCU row. | ||
620 | */ | ||
621 | |||
622 | JSAMPLE * sample_range_limit; /* table for fast range-limiting */ | ||
623 | |||
624 | /* | ||
625 | * These fields are valid during any one scan. | ||
626 | * They describe the components and MCUs actually appearing in the scan. | ||
627 | * Note that the decompressor output side must not use these fields. | ||
628 | */ | ||
629 | int comps_in_scan; /* # of JPEG components in this scan */ | ||
630 | jpeg_component_info * cur_comp_info[MAX_COMPS_IN_SCAN]; | ||
631 | /* *cur_comp_info[i] describes component that appears i'th in SOS */ | ||
632 | |||
633 | JDIMENSION MCUs_per_row; /* # of MCUs across the image */ | ||
634 | JDIMENSION MCU_rows_in_scan; /* # of MCU rows in the image */ | ||
635 | |||
636 | int blocks_in_MCU; /* # of DCT blocks per MCU */ | ||
637 | int MCU_membership[D_MAX_BLOCKS_IN_MCU]; | ||
638 | /* MCU_membership[i] is index in cur_comp_info of component owning */ | ||
639 | /* i'th block in an MCU */ | ||
640 | |||
641 | int Ss, Se, Ah, Al; /* progressive JPEG parameters for scan */ | ||
642 | |||
643 | /* These fields are derived from Se of first SOS marker. | ||
644 | */ | ||
645 | int block_size; /* the basic DCT block size: 1..16 */ | ||
646 | const int * natural_order; /* natural-order position array for entropy decode */ | ||
647 | int lim_Se; /* min( Se, DCTSIZE2-1 ) for entropy decode */ | ||
648 | |||
649 | /* This field is shared between entropy decoder and marker parser. | ||
650 | * It is either zero or the code of a JPEG marker that has been | ||
651 | * read from the data source, but has not yet been processed. | ||
652 | */ | ||
653 | int unread_marker; | ||
654 | |||
655 | /* | ||
656 | * Links to decompression subobjects (methods, private variables of modules) | ||
657 | */ | ||
658 | struct jpeg_decomp_master * master; | ||
659 | struct jpeg_d_main_controller * main; | ||
660 | struct jpeg_d_coef_controller * coef; | ||
661 | struct jpeg_d_post_controller * post; | ||
662 | struct jpeg_input_controller * inputctl; | ||
663 | struct jpeg_marker_reader * marker; | ||
664 | struct jpeg_entropy_decoder * entropy; | ||
665 | struct jpeg_inverse_dct * idct; | ||
666 | struct jpeg_upsampler * upsample; | ||
667 | struct jpeg_color_deconverter * cconvert; | ||
668 | struct jpeg_color_quantizer * cquantize; | ||
669 | }; | ||
670 | |||
671 | |||
672 | /* "Object" declarations for JPEG modules that may be supplied or called | ||
673 | * directly by the surrounding application. | ||
674 | * As with all objects in the JPEG library, these structs only define the | ||
675 | * publicly visible methods and state variables of a module. Additional | ||
676 | * private fields may exist after the public ones. | ||
677 | */ | ||
678 | |||
679 | |||
680 | /* Error handler object */ | ||
681 | |||
682 | struct jpeg_error_mgr { | ||
683 | /* Error exit handler: does not return to caller */ | ||
684 | JMETHOD(void, error_exit, (j_common_ptr cinfo)); | ||
685 | /* Conditionally emit a trace or warning message */ | ||
686 | JMETHOD(void, emit_message, (j_common_ptr cinfo, int msg_level)); | ||
687 | /* Routine that actually outputs a trace or error message */ | ||
688 | JMETHOD(void, output_message, (j_common_ptr cinfo)); | ||
689 | /* Format a message string for the most recent JPEG error or message */ | ||
690 | JMETHOD(void, format_message, (j_common_ptr cinfo, char * buffer)); | ||
691 | #define JMSG_LENGTH_MAX 200 /* recommended size of format_message buffer */ | ||
692 | /* Reset error state variables at start of a new image */ | ||
693 | JMETHOD(void, reset_error_mgr, (j_common_ptr cinfo)); | ||
694 | |||
695 | /* The message ID code and any parameters are saved here. | ||
696 | * A message can have one string parameter or up to 8 int parameters. | ||
697 | */ | ||
698 | int msg_code; | ||
699 | #define JMSG_STR_PARM_MAX 80 | ||
700 | union { | ||
701 | int i[8]; | ||
702 | char s[JMSG_STR_PARM_MAX]; | ||
703 | } msg_parm; | ||
704 | |||
705 | /* Standard state variables for error facility */ | ||
706 | |||
707 | int trace_level; /* max msg_level that will be displayed */ | ||
708 | |||
709 | /* For recoverable corrupt-data errors, we emit a warning message, | ||
710 | * but keep going unless emit_message chooses to abort. emit_message | ||
711 | * should count warnings in num_warnings. The surrounding application | ||
712 | * can check for bad data by seeing if num_warnings is nonzero at the | ||
713 | * end of processing. | ||
714 | */ | ||
715 | long num_warnings; /* number of corrupt-data warnings */ | ||
716 | |||
717 | /* These fields point to the table(s) of error message strings. | ||
718 | * An application can change the table pointer to switch to a different | ||
719 | * message list (typically, to change the language in which errors are | ||
720 | * reported). Some applications may wish to add additional error codes | ||
721 | * that will be handled by the JPEG library error mechanism; the second | ||
722 | * table pointer is used for this purpose. | ||
723 | * | ||
724 | * First table includes all errors generated by JPEG library itself. | ||
725 | * Error code 0 is reserved for a "no such error string" message. | ||
726 | */ | ||
727 | const char * const * jpeg_message_table; /* Library errors */ | ||
728 | int last_jpeg_message; /* Table contains strings 0..last_jpeg_message */ | ||
729 | /* Second table can be added by application (see cjpeg/djpeg for example). | ||
730 | * It contains strings numbered first_addon_message..last_addon_message. | ||
731 | */ | ||
732 | const char * const * addon_message_table; /* Non-library errors */ | ||
733 | int first_addon_message; /* code for first string in addon table */ | ||
734 | int last_addon_message; /* code for last string in addon table */ | ||
735 | }; | ||
736 | |||
737 | |||
738 | /* Progress monitor object */ | ||
739 | |||
740 | struct jpeg_progress_mgr { | ||
741 | JMETHOD(void, progress_monitor, (j_common_ptr cinfo)); | ||
742 | |||
743 | long pass_counter; /* work units completed in this pass */ | ||
744 | long pass_limit; /* total number of work units in this pass */ | ||
745 | int completed_passes; /* passes completed so far */ | ||
746 | int total_passes; /* total number of passes expected */ | ||
747 | }; | ||
748 | |||
749 | |||
750 | /* Data destination object for compression */ | ||
751 | |||
752 | struct jpeg_destination_mgr { | ||
753 | JOCTET * next_output_byte; /* => next byte to write in buffer */ | ||
754 | size_t free_in_buffer; /* # of byte spaces remaining in buffer */ | ||
755 | |||
756 | JMETHOD(void, init_destination, (j_compress_ptr cinfo)); | ||
757 | JMETHOD(boolean, empty_output_buffer, (j_compress_ptr cinfo)); | ||
758 | JMETHOD(void, term_destination, (j_compress_ptr cinfo)); | ||
759 | }; | ||
760 | |||
761 | |||
762 | /* Data source object for decompression */ | ||
763 | |||
764 | struct jpeg_source_mgr { | ||
765 | const JOCTET * next_input_byte; /* => next byte to read from buffer */ | ||
766 | size_t bytes_in_buffer; /* # of bytes remaining in buffer */ | ||
767 | |||
768 | JMETHOD(void, init_source, (j_decompress_ptr cinfo)); | ||
769 | JMETHOD(boolean, fill_input_buffer, (j_decompress_ptr cinfo)); | ||
770 | JMETHOD(void, skip_input_data, (j_decompress_ptr cinfo, long num_bytes)); | ||
771 | JMETHOD(boolean, resync_to_restart, (j_decompress_ptr cinfo, int desired)); | ||
772 | JMETHOD(void, term_source, (j_decompress_ptr cinfo)); | ||
773 | }; | ||
774 | |||
775 | |||
776 | /* Memory manager object. | ||
777 | * Allocates "small" objects (a few K total), "large" objects (tens of K), | ||
778 | * and "really big" objects (virtual arrays with backing store if needed). | ||
779 | * The memory manager does not allow individual objects to be freed; rather, | ||
780 | * each created object is assigned to a pool, and whole pools can be freed | ||
781 | * at once. This is faster and more convenient than remembering exactly what | ||
782 | * to free, especially where malloc()/free() are not too speedy. | ||
783 | * NB: alloc routines never return NULL. They exit to error_exit if not | ||
784 | * successful. | ||
785 | */ | ||
786 | |||
787 | #define JPOOL_PERMANENT 0 /* lasts until master record is destroyed */ | ||
788 | #define JPOOL_IMAGE 1 /* lasts until done with image/datastream */ | ||
789 | #define JPOOL_NUMPOOLS 2 | ||
790 | |||
791 | typedef struct jvirt_sarray_control * jvirt_sarray_ptr; | ||
792 | typedef struct jvirt_barray_control * jvirt_barray_ptr; | ||
793 | |||
794 | |||
795 | struct jpeg_memory_mgr { | ||
796 | /* Method pointers */ | ||
797 | JMETHOD(void *, alloc_small, (j_common_ptr cinfo, int pool_id, | ||
798 | size_t sizeofobject)); | ||
799 | JMETHOD(void FAR *, alloc_large, (j_common_ptr cinfo, int pool_id, | ||
800 | size_t sizeofobject)); | ||
801 | JMETHOD(JSAMPARRAY, alloc_sarray, (j_common_ptr cinfo, int pool_id, | ||
802 | JDIMENSION samplesperrow, | ||
803 | JDIMENSION numrows)); | ||
804 | JMETHOD(JBLOCKARRAY, alloc_barray, (j_common_ptr cinfo, int pool_id, | ||
805 | JDIMENSION blocksperrow, | ||
806 | JDIMENSION numrows)); | ||
807 | JMETHOD(jvirt_sarray_ptr, request_virt_sarray, (j_common_ptr cinfo, | ||
808 | int pool_id, | ||
809 | boolean pre_zero, | ||
810 | JDIMENSION samplesperrow, | ||
811 | JDIMENSION numrows, | ||
812 | JDIMENSION maxaccess)); | ||
813 | JMETHOD(jvirt_barray_ptr, request_virt_barray, (j_common_ptr cinfo, | ||
814 | int pool_id, | ||
815 | boolean pre_zero, | ||
816 | JDIMENSION blocksperrow, | ||
817 | JDIMENSION numrows, | ||
818 | JDIMENSION maxaccess)); | ||
819 | JMETHOD(void, realize_virt_arrays, (j_common_ptr cinfo)); | ||
820 | JMETHOD(JSAMPARRAY, access_virt_sarray, (j_common_ptr cinfo, | ||
821 | jvirt_sarray_ptr ptr, | ||
822 | JDIMENSION start_row, | ||
823 | JDIMENSION num_rows, | ||
824 | boolean writable)); | ||
825 | JMETHOD(JBLOCKARRAY, access_virt_barray, (j_common_ptr cinfo, | ||
826 | jvirt_barray_ptr ptr, | ||
827 | JDIMENSION start_row, | ||
828 | JDIMENSION num_rows, | ||
829 | boolean writable)); | ||
830 | JMETHOD(void, free_pool, (j_common_ptr cinfo, int pool_id)); | ||
831 | JMETHOD(void, self_destruct, (j_common_ptr cinfo)); | ||
832 | |||
833 | /* Limit on memory allocation for this JPEG object. (Note that this is | ||
834 | * merely advisory, not a guaranteed maximum; it only affects the space | ||
835 | * used for virtual-array buffers.) May be changed by outer application | ||
836 | * after creating the JPEG object. | ||
837 | */ | ||
838 | long max_memory_to_use; | ||
839 | |||
840 | /* Maximum allocation request accepted by alloc_large. */ | ||
841 | long max_alloc_chunk; | ||
842 | }; | ||
843 | |||
844 | |||
845 | /* Routine signature for application-supplied marker processing methods. | ||
846 | * Need not pass marker code since it is stored in cinfo->unread_marker. | ||
847 | */ | ||
848 | typedef JMETHOD(boolean, jpeg_marker_parser_method, (j_decompress_ptr cinfo)); | ||
849 | |||
850 | |||
851 | /* Declarations for routines called by application. | ||
852 | * The JPP macro hides prototype parameters from compilers that can't cope. | ||
853 | * Note JPP requires double parentheses. | ||
854 | */ | ||
855 | |||
856 | #ifdef HAVE_PROTOTYPES | ||
857 | #define JPP(arglist) arglist | ||
858 | #else | ||
859 | #define JPP(arglist) () | ||
860 | #endif | ||
861 | |||
862 | |||
863 | /* Short forms of external names for systems with brain-damaged linkers. | ||
864 | * We shorten external names to be unique in the first six letters, which | ||
865 | * is good enough for all known systems. | ||
866 | * (If your compiler itself needs names to be unique in less than 15 | ||
867 | * characters, you are out of luck. Get a better compiler.) | ||
868 | */ | ||
869 | |||
870 | #ifdef NEED_SHORT_EXTERNAL_NAMES | ||
871 | #define jpeg_std_error jStdError | ||
872 | #define jpeg_CreateCompress jCreaCompress | ||
873 | #define jpeg_CreateDecompress jCreaDecompress | ||
874 | #define jpeg_destroy_compress jDestCompress | ||
875 | #define jpeg_destroy_decompress jDestDecompress | ||
876 | #define jpeg_stdio_dest jStdDest | ||
877 | #define jpeg_stdio_src jStdSrc | ||
878 | #define jpeg_mem_dest jMemDest | ||
879 | #define jpeg_mem_src jMemSrc | ||
880 | #define jpeg_set_defaults jSetDefaults | ||
881 | #define jpeg_set_colorspace jSetColorspace | ||
882 | #define jpeg_default_colorspace jDefColorspace | ||
883 | #define jpeg_set_quality jSetQuality | ||
884 | #define jpeg_set_linear_quality jSetLQuality | ||
885 | #define jpeg_default_qtables jDefQTables | ||
886 | #define jpeg_add_quant_table jAddQuantTable | ||
887 | #define jpeg_quality_scaling jQualityScaling | ||
888 | #define jpeg_simple_progression jSimProgress | ||
889 | #define jpeg_suppress_tables jSuppressTables | ||
890 | #define jpeg_alloc_quant_table jAlcQTable | ||
891 | #define jpeg_alloc_huff_table jAlcHTable | ||
892 | #define jpeg_start_compress jStrtCompress | ||
893 | #define jpeg_write_scanlines jWrtScanlines | ||
894 | #define jpeg_finish_compress jFinCompress | ||
895 | #define jpeg_calc_jpeg_dimensions jCjpegDimensions | ||
896 | #define jpeg_write_raw_data jWrtRawData | ||
897 | #define jpeg_write_marker jWrtMarker | ||
898 | #define jpeg_write_m_header jWrtMHeader | ||
899 | #define jpeg_write_m_byte jWrtMByte | ||
900 | #define jpeg_write_tables jWrtTables | ||
901 | #define jpeg_read_header jReadHeader | ||
902 | #define jpeg_start_decompress jStrtDecompress | ||
903 | #define jpeg_read_scanlines jReadScanlines | ||
904 | #define jpeg_finish_decompress jFinDecompress | ||
905 | #define jpeg_read_raw_data jReadRawData | ||
906 | #define jpeg_has_multiple_scans jHasMultScn | ||
907 | #define jpeg_start_output jStrtOutput | ||
908 | #define jpeg_finish_output jFinOutput | ||
909 | #define jpeg_input_complete jInComplete | ||
910 | #define jpeg_new_colormap jNewCMap | ||
911 | #define jpeg_consume_input jConsumeInput | ||
912 | #define jpeg_core_output_dimensions jCoreDimensions | ||
913 | #define jpeg_calc_output_dimensions jCalcDimensions | ||
914 | #define jpeg_save_markers jSaveMarkers | ||
915 | #define jpeg_set_marker_processor jSetMarker | ||
916 | #define jpeg_read_coefficients jReadCoefs | ||
917 | #define jpeg_write_coefficients jWrtCoefs | ||
918 | #define jpeg_copy_critical_parameters jCopyCrit | ||
919 | #define jpeg_abort_compress jAbrtCompress | ||
920 | #define jpeg_abort_decompress jAbrtDecompress | ||
921 | #define jpeg_abort jAbort | ||
922 | #define jpeg_destroy jDestroy | ||
923 | #define jpeg_resync_to_restart jResyncRestart | ||
924 | #endif /* NEED_SHORT_EXTERNAL_NAMES */ | ||
925 | |||
926 | |||
927 | /* Default error-management setup */ | ||
928 | EXTERN(struct jpeg_error_mgr *) jpeg_std_error | ||
929 | JPP((struct jpeg_error_mgr * err)); | ||
930 | |||
931 | /* Initialization of JPEG compression objects. | ||
932 | * jpeg_create_compress() and jpeg_create_decompress() are the exported | ||
933 | * names that applications should call. These expand to calls on | ||
934 | * jpeg_CreateCompress and jpeg_CreateDecompress with additional information | ||
935 | * passed for version mismatch checking. | ||
936 | * NB: you must set up the error-manager BEFORE calling jpeg_create_xxx. | ||
937 | */ | ||
938 | #define jpeg_create_compress(cinfo) \ | ||
939 | jpeg_CreateCompress((cinfo), JPEG_LIB_VERSION, \ | ||
940 | (size_t) sizeof(struct jpeg_compress_struct)) | ||
941 | #define jpeg_create_decompress(cinfo) \ | ||
942 | jpeg_CreateDecompress((cinfo), JPEG_LIB_VERSION, \ | ||
943 | (size_t) sizeof(struct jpeg_decompress_struct)) | ||
944 | EXTERN(void) jpeg_CreateCompress JPP((j_compress_ptr cinfo, | ||
945 | int version, size_t structsize)); | ||
946 | EXTERN(void) jpeg_CreateDecompress JPP((j_decompress_ptr cinfo, | ||
947 | int version, size_t structsize)); | ||
948 | /* Destruction of JPEG compression objects */ | ||
949 | EXTERN(void) jpeg_destroy_compress JPP((j_compress_ptr cinfo)); | ||
950 | EXTERN(void) jpeg_destroy_decompress JPP((j_decompress_ptr cinfo)); | ||
951 | |||
952 | /* Standard data source and destination managers: stdio streams. */ | ||
953 | /* Caller is responsible for opening the file before and closing after. */ | ||
954 | EXTERN(void) jpeg_stdio_dest JPP((j_compress_ptr cinfo, FILE * outfile)); | ||
955 | EXTERN(void) jpeg_stdio_src JPP((j_decompress_ptr cinfo, FILE * infile)); | ||
956 | |||
957 | /* Data source and destination managers: memory buffers. */ | ||
958 | EXTERN(void) jpeg_mem_dest JPP((j_compress_ptr cinfo, | ||
959 | unsigned char ** outbuffer, | ||
960 | unsigned long * outsize)); | ||
961 | EXTERN(void) jpeg_mem_src JPP((j_decompress_ptr cinfo, | ||
962 | unsigned char * inbuffer, | ||
963 | unsigned long insize)); | ||
964 | |||
965 | /* Default parameter setup for compression */ | ||
966 | EXTERN(void) jpeg_set_defaults JPP((j_compress_ptr cinfo)); | ||
967 | /* Compression parameter setup aids */ | ||
968 | EXTERN(void) jpeg_set_colorspace JPP((j_compress_ptr cinfo, | ||
969 | J_COLOR_SPACE colorspace)); | ||
970 | EXTERN(void) jpeg_default_colorspace JPP((j_compress_ptr cinfo)); | ||
971 | EXTERN(void) jpeg_set_quality JPP((j_compress_ptr cinfo, int quality, | ||
972 | boolean force_baseline)); | ||
973 | EXTERN(void) jpeg_set_linear_quality JPP((j_compress_ptr cinfo, | ||
974 | int scale_factor, | ||
975 | boolean force_baseline)); | ||
976 | EXTERN(void) jpeg_default_qtables JPP((j_compress_ptr cinfo, | ||
977 | boolean force_baseline)); | ||
978 | EXTERN(void) jpeg_add_quant_table JPP((j_compress_ptr cinfo, int which_tbl, | ||
979 | const unsigned int *basic_table, | ||
980 | int scale_factor, | ||
981 | boolean force_baseline)); | ||
982 | EXTERN(int) jpeg_quality_scaling JPP((int quality)); | ||
983 | EXTERN(void) jpeg_simple_progression JPP((j_compress_ptr cinfo)); | ||
984 | EXTERN(void) jpeg_suppress_tables JPP((j_compress_ptr cinfo, | ||
985 | boolean suppress)); | ||
986 | EXTERN(JQUANT_TBL *) jpeg_alloc_quant_table JPP((j_common_ptr cinfo)); | ||
987 | EXTERN(JHUFF_TBL *) jpeg_alloc_huff_table JPP((j_common_ptr cinfo)); | ||
988 | |||
989 | /* Main entry points for compression */ | ||
990 | EXTERN(void) jpeg_start_compress JPP((j_compress_ptr cinfo, | ||
991 | boolean write_all_tables)); | ||
992 | EXTERN(JDIMENSION) jpeg_write_scanlines JPP((j_compress_ptr cinfo, | ||
993 | JSAMPARRAY scanlines, | ||
994 | JDIMENSION num_lines)); | ||
995 | EXTERN(void) jpeg_finish_compress JPP((j_compress_ptr cinfo)); | ||
996 | |||
997 | /* Precalculate JPEG dimensions for current compression parameters. */ | ||
998 | EXTERN(void) jpeg_calc_jpeg_dimensions JPP((j_compress_ptr cinfo)); | ||
999 | |||
1000 | /* Replaces jpeg_write_scanlines when writing raw downsampled data. */ | ||
1001 | EXTERN(JDIMENSION) jpeg_write_raw_data JPP((j_compress_ptr cinfo, | ||
1002 | JSAMPIMAGE data, | ||
1003 | JDIMENSION num_lines)); | ||
1004 | |||
1005 | /* Write a special marker. See libjpeg.txt concerning safe usage. */ | ||
1006 | EXTERN(void) jpeg_write_marker | ||
1007 | JPP((j_compress_ptr cinfo, int marker, | ||
1008 | const JOCTET * dataptr, unsigned int datalen)); | ||
1009 | /* Same, but piecemeal. */ | ||
1010 | EXTERN(void) jpeg_write_m_header | ||
1011 | JPP((j_compress_ptr cinfo, int marker, unsigned int datalen)); | ||
1012 | EXTERN(void) jpeg_write_m_byte | ||
1013 | JPP((j_compress_ptr cinfo, int val)); | ||
1014 | |||
1015 | /* Alternate compression function: just write an abbreviated table file */ | ||
1016 | EXTERN(void) jpeg_write_tables JPP((j_compress_ptr cinfo)); | ||
1017 | |||
1018 | /* Decompression startup: read start of JPEG datastream to see what's there */ | ||
1019 | EXTERN(int) jpeg_read_header JPP((j_decompress_ptr cinfo, | ||
1020 | boolean require_image)); | ||
1021 | /* Return value is one of: */ | ||
1022 | #define JPEG_SUSPENDED 0 /* Suspended due to lack of input data */ | ||
1023 | #define JPEG_HEADER_OK 1 /* Found valid image datastream */ | ||
1024 | #define JPEG_HEADER_TABLES_ONLY 2 /* Found valid table-specs-only datastream */ | ||
1025 | /* If you pass require_image = TRUE (normal case), you need not check for | ||
1026 | * a TABLES_ONLY return code; an abbreviated file will cause an error exit. | ||
1027 | * JPEG_SUSPENDED is only possible if you use a data source module that can | ||
1028 | * give a suspension return (the stdio source module doesn't). | ||
1029 | */ | ||
1030 | |||
1031 | /* Main entry points for decompression */ | ||
1032 | EXTERN(boolean) jpeg_start_decompress JPP((j_decompress_ptr cinfo)); | ||
1033 | EXTERN(JDIMENSION) jpeg_read_scanlines JPP((j_decompress_ptr cinfo, | ||
1034 | JSAMPARRAY scanlines, | ||
1035 | JDIMENSION max_lines)); | ||
1036 | EXTERN(boolean) jpeg_finish_decompress JPP((j_decompress_ptr cinfo)); | ||
1037 | |||
1038 | /* Replaces jpeg_read_scanlines when reading raw downsampled data. */ | ||
1039 | EXTERN(JDIMENSION) jpeg_read_raw_data JPP((j_decompress_ptr cinfo, | ||
1040 | JSAMPIMAGE data, | ||
1041 | JDIMENSION max_lines)); | ||
1042 | |||
1043 | /* Additional entry points for buffered-image mode. */ | ||
1044 | EXTERN(boolean) jpeg_has_multiple_scans JPP((j_decompress_ptr cinfo)); | ||
1045 | EXTERN(boolean) jpeg_start_output JPP((j_decompress_ptr cinfo, | ||
1046 | int scan_number)); | ||
1047 | EXTERN(boolean) jpeg_finish_output JPP((j_decompress_ptr cinfo)); | ||
1048 | EXTERN(boolean) jpeg_input_complete JPP((j_decompress_ptr cinfo)); | ||
1049 | EXTERN(void) jpeg_new_colormap JPP((j_decompress_ptr cinfo)); | ||
1050 | EXTERN(int) jpeg_consume_input JPP((j_decompress_ptr cinfo)); | ||
1051 | /* Return value is one of: */ | ||
1052 | /* #define JPEG_SUSPENDED 0 Suspended due to lack of input data */ | ||
1053 | #define JPEG_REACHED_SOS 1 /* Reached start of new scan */ | ||
1054 | #define JPEG_REACHED_EOI 2 /* Reached end of image */ | ||
1055 | #define JPEG_ROW_COMPLETED 3 /* Completed one iMCU row */ | ||
1056 | #define JPEG_SCAN_COMPLETED 4 /* Completed last iMCU row of a scan */ | ||
1057 | |||
1058 | /* Precalculate output dimensions for current decompression parameters. */ | ||
1059 | EXTERN(void) jpeg_core_output_dimensions JPP((j_decompress_ptr cinfo)); | ||
1060 | EXTERN(void) jpeg_calc_output_dimensions JPP((j_decompress_ptr cinfo)); | ||
1061 | |||
1062 | /* Control saving of COM and APPn markers into marker_list. */ | ||
1063 | EXTERN(void) jpeg_save_markers | ||
1064 | JPP((j_decompress_ptr cinfo, int marker_code, | ||
1065 | unsigned int length_limit)); | ||
1066 | |||
1067 | /* Install a special processing method for COM or APPn markers. */ | ||
1068 | EXTERN(void) jpeg_set_marker_processor | ||
1069 | JPP((j_decompress_ptr cinfo, int marker_code, | ||
1070 | jpeg_marker_parser_method routine)); | ||
1071 | |||
1072 | /* Read or write raw DCT coefficients --- useful for lossless transcoding. */ | ||
1073 | EXTERN(jvirt_barray_ptr *) jpeg_read_coefficients JPP((j_decompress_ptr cinfo)); | ||
1074 | EXTERN(void) jpeg_write_coefficients JPP((j_compress_ptr cinfo, | ||
1075 | jvirt_barray_ptr * coef_arrays)); | ||
1076 | EXTERN(void) jpeg_copy_critical_parameters JPP((j_decompress_ptr srcinfo, | ||
1077 | j_compress_ptr dstinfo)); | ||
1078 | |||
1079 | /* If you choose to abort compression or decompression before completing | ||
1080 | * jpeg_finish_(de)compress, then you need to clean up to release memory, | ||
1081 | * temporary files, etc. You can just call jpeg_destroy_(de)compress | ||
1082 | * if you're done with the JPEG object, but if you want to clean it up and | ||
1083 | * reuse it, call this: | ||
1084 | */ | ||
1085 | EXTERN(void) jpeg_abort_compress JPP((j_compress_ptr cinfo)); | ||
1086 | EXTERN(void) jpeg_abort_decompress JPP((j_decompress_ptr cinfo)); | ||
1087 | |||
1088 | /* Generic versions of jpeg_abort and jpeg_destroy that work on either | ||
1089 | * flavor of JPEG object. These may be more convenient in some places. | ||
1090 | */ | ||
1091 | EXTERN(void) jpeg_abort JPP((j_common_ptr cinfo)); | ||
1092 | EXTERN(void) jpeg_destroy JPP((j_common_ptr cinfo)); | ||
1093 | |||
1094 | /* Default restart-marker-resync procedure for use by data source modules */ | ||
1095 | EXTERN(boolean) jpeg_resync_to_restart JPP((j_decompress_ptr cinfo, | ||
1096 | int desired)); | ||
1097 | |||
1098 | |||
1099 | /* These marker codes are exported since applications and data source modules | ||
1100 | * are likely to want to use them. | ||
1101 | */ | ||
1102 | |||
1103 | #define JPEG_RST0 0xD0 /* RST0 marker code */ | ||
1104 | #define JPEG_EOI 0xD9 /* EOI marker code */ | ||
1105 | #define JPEG_APP0 0xE0 /* APP0 marker code */ | ||
1106 | #define JPEG_COM 0xFE /* COM marker code */ | ||
1107 | |||
1108 | |||
1109 | /* If we have a brain-damaged compiler that emits warnings (or worse, errors) | ||
1110 | * for structure definitions that are never filled in, keep it quiet by | ||
1111 | * supplying dummy definitions for the various substructures. | ||
1112 | */ | ||
1113 | |||
1114 | #ifdef INCOMPLETE_TYPES_BROKEN | ||
1115 | #ifndef JPEG_INTERNALS /* will be defined in jpegint.h */ | ||
1116 | struct jvirt_sarray_control { long dummy; }; | ||
1117 | struct jvirt_barray_control { long dummy; }; | ||
1118 | struct jpeg_comp_master { long dummy; }; | ||
1119 | struct jpeg_c_main_controller { long dummy; }; | ||
1120 | struct jpeg_c_prep_controller { long dummy; }; | ||
1121 | struct jpeg_c_coef_controller { long dummy; }; | ||
1122 | struct jpeg_marker_writer { long dummy; }; | ||
1123 | struct jpeg_color_converter { long dummy; }; | ||
1124 | struct jpeg_downsampler { long dummy; }; | ||
1125 | struct jpeg_forward_dct { long dummy; }; | ||
1126 | struct jpeg_entropy_encoder { long dummy; }; | ||
1127 | struct jpeg_decomp_master { long dummy; }; | ||
1128 | struct jpeg_d_main_controller { long dummy; }; | ||
1129 | struct jpeg_d_coef_controller { long dummy; }; | ||
1130 | struct jpeg_d_post_controller { long dummy; }; | ||
1131 | struct jpeg_input_controller { long dummy; }; | ||
1132 | struct jpeg_marker_reader { long dummy; }; | ||
1133 | struct jpeg_entropy_decoder { long dummy; }; | ||
1134 | struct jpeg_inverse_dct { long dummy; }; | ||
1135 | struct jpeg_upsampler { long dummy; }; | ||
1136 | struct jpeg_color_deconverter { long dummy; }; | ||
1137 | struct jpeg_color_quantizer { long dummy; }; | ||
1138 | #endif /* JPEG_INTERNALS */ | ||
1139 | #endif /* INCOMPLETE_TYPES_BROKEN */ | ||
1140 | |||
1141 | |||
1142 | /* | ||
1143 | * The JPEG library modules define JPEG_INTERNALS before including this file. | ||
1144 | * The internal structure declarations are read only when that is true. | ||
1145 | * Applications using the library should not include jpegint.h, but may wish | ||
1146 | * to include jerror.h. | ||
1147 | */ | ||
1148 | |||
1149 | #ifdef JPEG_INTERNALS | ||
1150 | #include "jpegint.h" /* fetch private declarations */ | ||
1151 | #include "jerror.h" /* fetch error codes too */ | ||
1152 | #endif | ||
1153 | |||
1154 | #ifdef __cplusplus | ||
1155 | #ifndef DONT_USE_EXTERN_C | ||
1156 | } | ||
1157 | #endif | ||
1158 | #endif | ||
1159 | |||
1160 | #endif /* JPEGLIB_H */ | ||