source: golgotha/src/i4/loaders/jpg/jpeglib.h @ 80

Last change on this file since 80 was 80, checked in by Sam Hocevar, 12 years ago
  • Adding the Golgotha source code. Not sure what's going to be interesting in there, but since it's all public domain, there's certainly stuff to pick up.
  • Property svn:keywords set to Id
File size: 43.5 KB
Line 
1/*
2 * jpeglib.h
3 *
4 * Copyright (C) 1991-1996, Thomas G. Lane.
5 * This file is part of the Independent JPEG Group's software.
6 * For conditions of distribution and use, see the accompanying README file.
7 *
8 * This file defines the application interface for the JPEG library.
9 * Most applications using the library need only include this file,
10 * and perhaps jerror.h if they want to know the exact error codes.
11 */
12
13#ifndef JPEGLIB_H
14#define JPEGLIB_H
15
16#include <stdio.h>
17#include "file/buf_file.hh"
18/*
19 * First we include the configuration files that record how this
20 * installation of the JPEG library is set up.  jconfig.h can be
21 * generated automatically for many systems.  jmorecfg.h contains
22 * manual configuration options that most people need not worry about.
23 */
24
25#ifdef _WINDOWS
26#define HAVE_BOOLEAN
27#include <windows.h>
28#endif
29
30#ifndef JCONFIG_INCLUDED        /* in case jinclude.h already did */
31#include "loaders/jpg/jconfig.h"                /* widely used configuration options */
32#endif
33#include "loaders/jpg/jmorecfg.h"               /* seldom changed options */
34
35
36/* Version ID for the JPEG library.
37 * Might be useful for tests like "#if JPEG_LIB_VERSION >= 60".
38 */
39
40#define JPEG_LIB_VERSION  61    /* Version 6a */
41
42
43/* Various constants determining the sizes of things.
44 * All of these are specified by the JPEG standard, so don't change them
45 * if you want to be compatible.
46 */
47
48#define DCTSIZE             8   /* The basic DCT block is 8x8 samples */
49#define DCTSIZE2            64  /* DCTSIZE squared; # of elements in a block */
50#define NUM_QUANT_TBLS      4   /* Quantization tables are numbered 0..3 */
51#define NUM_HUFF_TBLS       4   /* Huffman tables are numbered 0..3 */
52#define NUM_ARITH_TBLS      16  /* Arith-coding tables are numbered 0..15 */
53#define MAX_COMPS_IN_SCAN   4   /* JPEG limit on # of components in one scan */
54#define MAX_SAMP_FACTOR     4   /* JPEG limit on sampling factors */
55/* Unfortunately, some bozo at Adobe saw no reason to be bound by the standard;
56 * the PostScript DCT filter can emit files with many more than 10 blocks/MCU.
57 * If you happen to run across such a file, you can up D_MAX_BLOCKS_IN_MCU
58 * to handle it.  We even let you do this from the jconfig.h file.  However,
59 * we strongly discourage changing C_MAX_BLOCKS_IN_MCU; just because Adobe
60 * sometimes emits noncompliant files doesn't mean you should too.
61 */
62#define C_MAX_BLOCKS_IN_MCU   10 /* compressor's limit on blocks per MCU */
63#ifndef D_MAX_BLOCKS_IN_MCU
64#define D_MAX_BLOCKS_IN_MCU   10 /* decompressor's limit on blocks per MCU */
65#endif
66
67
68/* Data structures for images (arrays of samples and of DCT coefficients).
69 * On 80x86 machines, the image arrays are too big for near pointers,
70 * but the pointer arrays can fit in near memory.
71 */
72
73typedef JSAMPLE FAR *JSAMPROW;  /* ptr to one image row of pixel samples. */
74typedef JSAMPROW *JSAMPARRAY;   /* ptr to some rows (a 2-D sample array) */
75typedef JSAMPARRAY *JSAMPIMAGE; /* a 3-D sample array: top index is color */
76
77typedef JCOEF JBLOCK[DCTSIZE2]; /* one block of coefficients */
78typedef JBLOCK FAR *JBLOCKROW;  /* pointer to one row of coefficient blocks */
79typedef JBLOCKROW *JBLOCKARRAY;         /* a 2-D array of coefficient blocks */
80typedef JBLOCKARRAY *JBLOCKIMAGE;       /* a 3-D array of coefficient blocks */
81
82typedef JCOEF FAR *JCOEFPTR;    /* useful in a couple of places */
83
84
85/* Types for JPEG compression parameters and working tables. */
86
87
88/* DCT coefficient quantization tables. */
89
90typedef struct {
91  /* This array gives the coefficient quantizers in natural array order
92   * (not the zigzag order in which they are stored in a JPEG DQT marker).
93   * CAUTION: IJG versions prior to v6a kept this array in zigzag order.
94   */
95  UINT16 quantval[DCTSIZE2];    /* quantization step for each coefficient */
96  /* This field is used only during compression.  It's initialized FALSE when
97   * the table is created, and set TRUE when it's been output to the file.
98   * You could suppress output of a table by setting this to TRUE.
99   * (See jpeg_suppress_tables for an example.)
100   */
101  boolean sent_table;           /* TRUE when table has been output */
102} JQUANT_TBL;
103
104
105/* Huffman coding tables. */
106
107typedef struct {
108  /* These two fields directly represent the contents of a JPEG DHT marker */
109  UINT8 bits[17];               /* bits[k] = # of symbols with codes of */
110                                /* length k bits; bits[0] is unused */
111  UINT8 huffval[256];           /* The symbols, in order of incr code length */
112  /* This field is used only during compression.  It's initialized FALSE when
113   * the table is created, and set TRUE when it's been output to the file.
114   * You could suppress output of a table by setting this to TRUE.
115   * (See jpeg_suppress_tables for an example.)
116   */
117  boolean sent_table;           /* TRUE when table has been output */
118} JHUFF_TBL;
119
120
121/* Basic info about one component (color channel). */
122
123typedef struct {
124  /* These values are fixed over the whole image. */
125  /* For compression, they must be supplied by parameter setup; */
126  /* for decompression, they are read from the SOF marker. */
127  int component_id;             /* identifier for this component (0..255) */
128  int component_index;          /* its index in SOF or cinfo->comp_info[] */
129  int h_samp_factor;            /* horizontal sampling factor (1..4) */
130  int v_samp_factor;            /* vertical sampling factor (1..4) */
131  int quant_tbl_no;             /* quantization table selector (0..3) */
132  /* These values may vary between scans. */
133  /* For compression, they must be supplied by parameter setup; */
134  /* for decompression, they are read from the SOS marker. */
135  /* The decompressor output side may not use these variables. */
136  int dc_tbl_no;                /* DC entropy table selector (0..3) */
137  int ac_tbl_no;                /* AC entropy table selector (0..3) */
138 
139  /* Remaining fields should be treated as private by applications. */
140 
141  /* These values are computed during compression or decompression startup: */
142  /* Component's size in DCT blocks.
143   * Any dummy blocks added to complete an MCU are not counted; therefore
144   * these values do not depend on whether a scan is interleaved or not.
145   */
146  JDIMENSION width_in_blocks;
147  JDIMENSION height_in_blocks;
148  /* Size of a DCT block in samples.  Always DCTSIZE for compression.
149   * For decompression this is the size of the output from one DCT block,
150   * reflecting any scaling we choose to apply during the IDCT step.
151   * Values of 1,2,4,8 are likely to be supported.  Note that different
152   * components may receive different IDCT scalings.
153   */
154  int DCT_scaled_size;
155  /* The downsampled dimensions are the component's actual, unpadded number
156   * of samples at the main buffer (preprocessing/compression interface), thus
157   * downsampled_width = ceil(image_width * Hi/Hmax)
158   * and similarly for height.  For decompression, IDCT scaling is included, so
159   * downsampled_width = ceil(image_width * Hi/Hmax * DCT_scaled_size/DCTSIZE)
160   */
161  JDIMENSION downsampled_width;  /* actual width in samples */
162  JDIMENSION downsampled_height; /* actual height in samples */
163  /* This flag is used only for decompression.  In cases where some of the
164   * components will be ignored (eg grayscale output from YCbCr image),
165   * we can skip most computations for the unused components.
166   */
167  boolean component_needed;     /* do we need the value of this component? */
168
169  /* These values are computed before starting a scan of the component. */
170  /* The decompressor output side may not use these variables. */
171  int MCU_width;                /* number of blocks per MCU, horizontally */
172  int MCU_height;               /* number of blocks per MCU, vertically */
173  int MCU_blocks;               /* MCU_width * MCU_height */
174  int MCU_sample_width;         /* MCU width in samples, MCU_width*DCT_scaled_size */
175  int last_col_width;           /* # of non-dummy blocks across in last MCU */
176  int last_row_height;          /* # of non-dummy blocks down in last MCU */
177
178  /* Saved quantization table for component; NULL if none yet saved.
179   * See jdinput.c comments about the need for this information.
180   * This field is currently used only for decompression.
181   */
182  JQUANT_TBL * quant_table;
183
184  /* Private per-component storage for DCT or IDCT subsystem. */
185  void * dct_table;
186} jpeg_component_info;
187
188
189/* The script for encoding a multiple-scan file is an array of these: */
190
191typedef struct {
192  int comps_in_scan;            /* number of components encoded in this scan */
193  int component_index[MAX_COMPS_IN_SCAN]; /* their SOF/comp_info[] indexes */
194  int Ss, Se;                   /* progressive JPEG spectral selection parms */
195  int Ah, Al;                   /* progressive JPEG successive approx. parms */
196} jpeg_scan_info;
197
198
199/* Known color spaces. */
200
201typedef enum {
202        JCS_UNKNOWN,            /* error/unspecified */
203        JCS_GRAYSCALE,          /* monochrome */
204        JCS_RGB,                /* red/green/blue */
205        JCS_YCbCr,              /* Y/Cb/Cr (also known as YUV) */
206        JCS_CMYK,               /* C/M/Y/K */
207        JCS_YCCK                /* Y/Cb/Cr/K */
208} J_COLOR_SPACE;
209
210/* DCT/IDCT algorithm options. */
211
212typedef enum {
213        JDCT_ISLOW,             /* slow but accurate integer algorithm */
214        JDCT_IFAST,             /* faster, less accurate integer method */
215        JDCT_FLOAT              /* floating-point: accurate, fast on fast HW */
216} J_DCT_METHOD;
217
218#ifndef JDCT_DEFAULT            /* may be overridden in jconfig.h */
219#define JDCT_DEFAULT  JDCT_ISLOW
220#endif
221#ifndef JDCT_FASTEST            /* may be overridden in jconfig.h */
222#define JDCT_FASTEST  JDCT_IFAST
223#endif
224
225/* Dithering options for decompression. */
226
227typedef enum {
228        JDITHER_NONE,           /* no dithering */
229        JDITHER_ORDERED,        /* simple ordered dither */
230        JDITHER_FS              /* Floyd-Steinberg error diffusion dither */
231} J_DITHER_MODE;
232
233
234/* Common fields between JPEG compression and decompression master structs. */
235
236#define jpeg_common_fields \
237  struct jpeg_error_mgr * err;  /* Error handler module */\
238  struct jpeg_memory_mgr * mem; /* Memory manager module */\
239  struct jpeg_progress_mgr * progress; /* Progress monitor, or NULL if none */\
240  boolean is_decompressor;      /* so common code can tell which is which */\
241  int global_state              /* for checking call sequence validity */
242
243/* Routines that are to be used by both halves of the library are declared
244 * to receive a pointer to this structure.  There are no actual instances of
245 * jpeg_common_struct, only of jpeg_compress_struct and jpeg_decompress_struct.
246 */
247struct jpeg_common_struct {
248  jpeg_common_fields;           /* Fields common to both master struct types */
249  /* Additional fields follow in an actual jpeg_compress_struct or
250   * jpeg_decompress_struct.  All three structs must agree on these
251   * initial fields!  (This would be a lot cleaner in C++.)
252   */
253};
254
255typedef struct jpeg_common_struct * j_common_ptr;
256typedef struct jpeg_compress_struct * j_compress_ptr;
257typedef struct jpeg_decompress_struct * j_decompress_ptr;
258
259
260/* Master record for a compression instance */
261
262struct jpeg_compress_struct {
263  jpeg_common_fields;           /* Fields shared with jpeg_decompress_struct */
264
265  /* Destination for compressed data */
266  struct jpeg_destination_mgr * dest;
267
268  /* Description of source image --- these fields must be filled in by
269   * outer application before starting compression.  in_color_space must
270   * be correct before you can even call jpeg_set_defaults().
271   */
272
273  JDIMENSION image_width;       /* input image width */
274  JDIMENSION image_height;      /* input image height */
275  int input_components;         /* # of color components in input image */
276  J_COLOR_SPACE in_color_space; /* colorspace of input image */
277
278  double input_gamma;           /* image gamma of input image */
279
280  /* Compression parameters --- these fields must be set before calling
281   * jpeg_start_compress().  We recommend calling jpeg_set_defaults() to
282   * initialize everything to reasonable defaults, then changing anything
283   * the application specifically wants to change.  That way you won't get
284   * burnt when new parameters are added.  Also note that there are several
285   * helper routines to simplify changing parameters.
286   */
287
288  int data_precision;           /* bits of precision in image data */
289
290  int num_components;           /* # of color components in JPEG image */
291  J_COLOR_SPACE jpeg_color_space; /* colorspace of JPEG image */
292
293  jpeg_component_info * comp_info;
294  /* comp_info[i] describes component that appears i'th in SOF */
295 
296  JQUANT_TBL * quant_tbl_ptrs[NUM_QUANT_TBLS];
297  /* ptrs to coefficient quantization tables, or NULL if not defined */
298 
299  JHUFF_TBL * dc_huff_tbl_ptrs[NUM_HUFF_TBLS];
300  JHUFF_TBL * ac_huff_tbl_ptrs[NUM_HUFF_TBLS];
301  /* ptrs to Huffman coding tables, or NULL if not defined */
302 
303  UINT8 arith_dc_L[NUM_ARITH_TBLS]; /* L values for DC arith-coding tables */
304  UINT8 arith_dc_U[NUM_ARITH_TBLS]; /* U values for DC arith-coding tables */
305  UINT8 arith_ac_K[NUM_ARITH_TBLS]; /* Kx values for AC arith-coding tables */
306
307  int num_scans;                /* # of entries in scan_info array */
308  const jpeg_scan_info * scan_info; /* script for multi-scan file, or NULL */
309  /* The default value of scan_info is NULL, which causes a single-scan
310   * sequential JPEG file to be emitted.  To create a multi-scan file,
311   * set num_scans and scan_info to point to an array of scan definitions.
312   */
313
314  boolean raw_data_in;          /* TRUE=caller supplies downsampled data */
315  boolean arith_code;           /* TRUE=arithmetic coding, FALSE=Huffman */
316  boolean optimize_coding;      /* TRUE=optimize entropy encoding parms */
317  boolean CCIR601_sampling;     /* TRUE=first samples are cosited */
318  int smoothing_factor;         /* 1..100, or 0 for no input smoothing */
319  J_DCT_METHOD dct_method;      /* DCT algorithm selector */
320
321  /* The restart interval can be specified in absolute MCUs by setting
322   * restart_interval, or in MCU rows by setting restart_in_rows
323   * (in which case the correct restart_interval will be figured
324   * for each scan).
325   */
326  unsigned int restart_interval; /* MCUs per restart, or 0 for no restart */
327  int restart_in_rows;          /* if > 0, MCU rows per restart interval */
328
329  /* Parameters controlling emission of special markers. */
330
331  boolean write_JFIF_header;    /* should a JFIF marker be written? */
332  /* These three values are not used by the JPEG code, merely copied */
333  /* into the JFIF APP0 marker.  density_unit can be 0 for unknown, */
334  /* 1 for dots/inch, or 2 for dots/cm.  Note that the pixel aspect */
335  /* ratio is defined by X_density/Y_density even when density_unit=0. */
336  UINT8 density_unit;           /* JFIF code for pixel size units */
337  UINT16 X_density;             /* Horizontal pixel density */
338  UINT16 Y_density;             /* Vertical pixel density */
339  boolean write_Adobe_marker;   /* should an Adobe marker be written? */
340 
341  /* State variable: index of next scanline to be written to
342   * jpeg_write_scanlines().  Application may use this to control its
343   * processing loop, e.g., "while (next_scanline < image_height)".
344   */
345
346  JDIMENSION next_scanline;     /* 0 .. image_height-1  */
347
348  /* Remaining fields are known throughout compressor, but generally
349   * should not be touched by a surrounding application.
350   */
351
352  /*
353   * These fields are computed during compression startup
354   */
355  boolean progressive_mode;     /* TRUE if scan script uses progressive mode */
356  int max_h_samp_factor;        /* largest h_samp_factor */
357  int max_v_samp_factor;        /* largest v_samp_factor */
358
359  JDIMENSION total_iMCU_rows;   /* # of iMCU rows to be input to coef ctlr */
360  /* The coefficient controller receives data in units of MCU rows as defined
361   * for fully interleaved scans (whether the JPEG file is interleaved or not).
362   * There are v_samp_factor * DCTSIZE sample rows of each component in an
363   * "iMCU" (interleaved MCU) row.
364   */
365 
366  /*
367   * These fields are valid during any one scan.
368   * They describe the components and MCUs actually appearing in the scan.
369   */
370  int comps_in_scan;            /* # of JPEG components in this scan */
371  jpeg_component_info * cur_comp_info[MAX_COMPS_IN_SCAN];
372  /* *cur_comp_info[i] describes component that appears i'th in SOS */
373 
374  JDIMENSION MCUs_per_row;      /* # of MCUs across the image */
375  JDIMENSION MCU_rows_in_scan;  /* # of MCU rows in the image */
376 
377  int blocks_in_MCU;            /* # of DCT blocks per MCU */
378  int MCU_membership[C_MAX_BLOCKS_IN_MCU];
379  /* MCU_membership[i] is index in cur_comp_info of component owning */
380  /* i'th block in an MCU */
381
382  int Ss, Se, Ah, Al;           /* progressive JPEG parameters for scan */
383
384  /*
385   * Links to compression subobjects (methods and private variables of modules)
386   */
387  struct jpeg_comp_master * master;
388  struct jpeg_c_main_controller * main;
389  struct jpeg_c_prep_controller * prep;
390  struct jpeg_c_coef_controller * coef;
391  struct jpeg_marker_writer * marker;
392  struct jpeg_color_converter * cconvert;
393  struct jpeg_downsampler * downsample;
394  struct jpeg_forward_dct * fdct;
395  struct jpeg_entropy_encoder * entropy;
396};
397
398
399/* Master record for a decompression instance */
400
401struct jpeg_decompress_struct {
402  jpeg_common_fields;           /* Fields shared with jpeg_compress_struct */
403
404  /* Source of compressed data */
405  struct jpeg_source_mgr * src;
406
407  /* Basic description of image --- filled in by jpeg_read_header(). */
408  /* Application may inspect these values to decide how to process image. */
409
410  JDIMENSION image_width;       /* nominal image width (from SOF marker) */
411  JDIMENSION image_height;      /* nominal image height */
412  int num_components;           /* # of color components in JPEG image */
413  J_COLOR_SPACE jpeg_color_space; /* colorspace of JPEG image */
414
415  /* Decompression processing parameters --- these fields must be set before
416   * calling jpeg_start_decompress().  Note that jpeg_read_header() initializes
417   * them to default values.
418   */
419
420  J_COLOR_SPACE out_color_space; /* colorspace for output */
421
422  unsigned int scale_num, scale_denom; /* fraction by which to scale image */
423
424  double output_gamma;          /* image gamma wanted in output */
425
426  boolean buffered_image;       /* TRUE=multiple output passes */
427  boolean raw_data_out;         /* TRUE=downsampled data wanted */
428
429  J_DCT_METHOD dct_method;      /* IDCT algorithm selector */
430  boolean do_fancy_upsampling;  /* TRUE=apply fancy upsampling */
431  boolean do_block_smoothing;   /* TRUE=apply interblock smoothing */
432
433  boolean quantize_colors;      /* TRUE=colormapped output wanted */
434  /* the following are ignored if not quantize_colors: */
435  J_DITHER_MODE dither_mode;    /* type of color dithering to use */
436  boolean two_pass_quantize;    /* TRUE=use two-pass color quantization */
437  int desired_number_of_colors; /* max # colors to use in created colormap */
438  /* these are significant only in buffered-image mode: */
439  boolean enable_1pass_quant;   /* enable future use of 1-pass quantizer */
440  boolean enable_external_quant;/* enable future use of external colormap */
441  boolean enable_2pass_quant;   /* enable future use of 2-pass quantizer */
442
443  /* Description of actual output image that will be returned to application.
444   * These fields are computed by jpeg_start_decompress().
445   * You can also use jpeg_calc_output_dimensions() to determine these values
446   * in advance of calling jpeg_start_decompress().
447   */
448
449  JDIMENSION output_width;      /* scaled image width */
450  JDIMENSION output_height;     /* scaled image height */
451  int out_color_components;     /* # of color components in out_color_space */
452  int output_components;        /* # of color components returned */
453  /* output_components is 1 (a colormap index) when quantizing colors;
454   * otherwise it equals out_color_components.
455   */
456  int rec_outbuf_height;        /* min recommended height of scanline buffer */
457  /* If the buffer passed to jpeg_read_scanlines() is less than this many rows
458   * high, space and time will be wasted due to unnecessary data copying.
459   * Usually rec_outbuf_height will be 1 or 2, at most 4.
460   */
461
462  /* When quantizing colors, the output colormap is described by these fields.
463   * The application can supply a colormap by setting colormap non-NULL before
464   * calling jpeg_start_decompress; otherwise a colormap is created during
465   * jpeg_start_decompress or jpeg_start_output.
466   * The map has out_color_components rows and actual_number_of_colors columns.
467   */
468  int actual_number_of_colors;  /* number of entries in use */
469  JSAMPARRAY colormap;          /* The color map as a 2-D pixel array */
470
471  /* State variables: these variables indicate the progress of decompression.
472   * The application may examine these but must not modify them.
473   */
474
475  /* Row index of next scanline to be read from jpeg_read_scanlines().
476   * Application may use this to control its processing loop, e.g.,
477   * "while (output_scanline < output_height)".
478   */
479  JDIMENSION output_scanline;   /* 0 .. output_height-1  */
480
481  /* Current input scan number and number of iMCU rows completed in scan.
482   * These indicate the progress of the decompressor input side.
483   */
484  int input_scan_number;        /* Number of SOS markers seen so far */
485  JDIMENSION input_iMCU_row;    /* Number of iMCU rows completed */
486
487  /* The "output scan number" is the notional scan being displayed by the
488   * output side.  The decompressor will not allow output scan/row number
489   * to get ahead of input scan/row, but it can fall arbitrarily far behind.
490   */
491  int output_scan_number;       /* Nominal scan number being displayed */
492  JDIMENSION output_iMCU_row;   /* Number of iMCU rows read */
493
494  /* Current progression status.  coef_bits[c][i] indicates the precision
495   * with which component c's DCT coefficient i (in zigzag order) is known.
496   * It is -1 when no data has yet been received, otherwise it is the point
497   * transform (shift) value for the most recent scan of the coefficient
498   * (thus, 0 at completion of the progression).
499   * This pointer is NULL when reading a non-progressive file.
500   */
501  int (*coef_bits)[DCTSIZE2];   /* -1 or current Al value for each coef */
502
503  /* Internal JPEG parameters --- the application usually need not look at
504   * these fields.  Note that the decompressor output side may not use
505   * any parameters that can change between scans.
506   */
507
508  /* Quantization and Huffman tables are carried forward across input
509   * datastreams when processing abbreviated JPEG datastreams.
510   */
511
512  JQUANT_TBL * quant_tbl_ptrs[NUM_QUANT_TBLS];
513  /* ptrs to coefficient quantization tables, or NULL if not defined */
514
515  JHUFF_TBL * dc_huff_tbl_ptrs[NUM_HUFF_TBLS];
516  JHUFF_TBL * ac_huff_tbl_ptrs[NUM_HUFF_TBLS];
517  /* ptrs to Huffman coding tables, or NULL if not defined */
518
519  /* These parameters are never carried across datastreams, since they
520   * are given in SOF/SOS markers or defined to be reset by SOI.
521   */
522
523  int data_precision;           /* bits of precision in image data */
524
525  jpeg_component_info * comp_info;
526  /* comp_info[i] describes component that appears i'th in SOF */
527
528  boolean progressive_mode;     /* TRUE if SOFn specifies progressive mode */
529  boolean arith_code;           /* TRUE=arithmetic coding, FALSE=Huffman */
530
531  UINT8 arith_dc_L[NUM_ARITH_TBLS]; /* L values for DC arith-coding tables */
532  UINT8 arith_dc_U[NUM_ARITH_TBLS]; /* U values for DC arith-coding tables */
533  UINT8 arith_ac_K[NUM_ARITH_TBLS]; /* Kx values for AC arith-coding tables */
534
535  unsigned int restart_interval; /* MCUs per restart interval, or 0 for no restart */
536
537  /* These fields record data obtained from optional markers recognized by
538   * the JPEG library.
539   */
540  boolean saw_JFIF_marker;      /* TRUE iff a JFIF APP0 marker was found */
541  /* Data copied from JFIF marker: */
542  UINT8 density_unit;           /* JFIF code for pixel size units */
543  UINT16 X_density;             /* Horizontal pixel density */
544  UINT16 Y_density;             /* Vertical pixel density */
545  boolean saw_Adobe_marker;     /* TRUE iff an Adobe APP14 marker was found */
546  UINT8 Adobe_transform;        /* Color transform code from Adobe marker */
547
548  boolean CCIR601_sampling;     /* TRUE=first samples are cosited */
549
550  /* Remaining fields are known throughout decompressor, but generally
551   * should not be touched by a surrounding application.
552   */
553
554  /*
555   * These fields are computed during decompression startup
556   */
557  int max_h_samp_factor;        /* largest h_samp_factor */
558  int max_v_samp_factor;        /* largest v_samp_factor */
559
560  int min_DCT_scaled_size;      /* smallest DCT_scaled_size of any component */
561
562  JDIMENSION total_iMCU_rows;   /* # of iMCU rows in image */
563  /* The coefficient controller's input and output progress is measured in
564   * units of "iMCU" (interleaved MCU) rows.  These are the same as MCU rows
565   * in fully interleaved JPEG scans, but are used whether the scan is
566   * interleaved or not.  We define an iMCU row as v_samp_factor DCT block
567   * rows of each component.  Therefore, the IDCT output contains
568   * v_samp_factor*DCT_scaled_size sample rows of a component per iMCU row.
569   */
570
571  JSAMPLE * sample_range_limit; /* table for fast range-limiting */
572
573  /*
574   * These fields are valid during any one scan.
575   * They describe the components and MCUs actually appearing in the scan.
576   * Note that the decompressor output side must not use these fields.
577   */
578  int comps_in_scan;            /* # of JPEG components in this scan */
579  jpeg_component_info * cur_comp_info[MAX_COMPS_IN_SCAN];
580  /* *cur_comp_info[i] describes component that appears i'th in SOS */
581
582  JDIMENSION MCUs_per_row;      /* # of MCUs across the image */
583  JDIMENSION MCU_rows_in_scan;  /* # of MCU rows in the image */
584
585  int blocks_in_MCU;            /* # of DCT blocks per MCU */
586  int MCU_membership[D_MAX_BLOCKS_IN_MCU];
587  /* MCU_membership[i] is index in cur_comp_info of component owning */
588  /* i'th block in an MCU */
589
590  int Ss, Se, Ah, Al;           /* progressive JPEG parameters for scan */
591
592  /* This field is shared between entropy decoder and marker parser.
593   * It is either zero or the code of a JPEG marker that has been
594   * read from the data source, but has not yet been processed.
595   */
596  int unread_marker;
597
598  /*
599   * Links to decompression subobjects (methods, private variables of modules)
600   */
601  struct jpeg_decomp_master * master;
602  struct jpeg_d_main_controller * main;
603  struct jpeg_d_coef_controller * coef;
604  struct jpeg_d_post_controller * post;
605  struct jpeg_input_controller * inputctl;
606  struct jpeg_marker_reader * marker;
607  struct jpeg_entropy_decoder * entropy;
608  struct jpeg_inverse_dct * idct;
609  struct jpeg_upsampler * upsample;
610  struct jpeg_color_deconverter * cconvert;
611  struct jpeg_color_quantizer * cquantize;
612};
613
614
615/* "Object" declarations for JPEG modules that may be supplied or called
616 * directly by the surrounding application.
617 * As with all objects in the JPEG library, these structs only define the
618 * publicly visible methods and state variables of a module.  Additional
619 * private fields may exist after the public ones.
620 */
621
622
623/* Error handler object */
624
625struct jpeg_error_mgr {
626  /* Error exit handler: does not return to caller */
627  JMETHOD(void, error_exit, (j_common_ptr cinfo));
628  /* Conditionally emit a trace or warning message */
629  JMETHOD(void, emit_message, (j_common_ptr cinfo, int msg_level));
630  /* Routine that actually outputs a trace or error message */
631  JMETHOD(void, output_message, (j_common_ptr cinfo));
632  /* Format a message string for the most recent JPEG error or message */
633  JMETHOD(void, format_message, (j_common_ptr cinfo, char * buffer));
634#define JMSG_LENGTH_MAX  200    /* recommended size of format_message buffer */
635  /* Reset error state variables at start of a new image */
636  JMETHOD(void, reset_error_mgr, (j_common_ptr cinfo));
637 
638  /* The message ID code and any parameters are saved here.
639   * A message can have one string parameter or up to 8 int parameters.
640   */
641  int msg_code;
642#define JMSG_STR_PARM_MAX  80
643  union {
644    int i[8];
645    char s[JMSG_STR_PARM_MAX];
646  } msg_parm;
647 
648  /* Standard state variables for error facility */
649 
650  int trace_level;              /* max msg_level that will be displayed */
651 
652  /* For recoverable corrupt-data errors, we emit a warning message,
653   * but keep going unless emit_message chooses to abort.  emit_message
654   * should count warnings in num_warnings.  The surrounding application
655   * can check for bad data by seeing if num_warnings is nonzero at the
656   * end of processing.
657   */
658  long num_warnings;            /* number of corrupt-data warnings */
659
660  /* These fields point to the table(s) of error message strings.
661   * An application can change the table pointer to switch to a different
662   * message list (typically, to change the language in which errors are
663   * reported).  Some applications may wish to add additional error codes
664   * that will be handled by the JPEG library error mechanism; the second
665   * table pointer is used for this purpose.
666   *
667   * First table includes all errors generated by JPEG library itself.
668   * Error code 0 is reserved for a "no such error string" message.
669   */
670  const char * const * jpeg_message_table; /* Library errors */
671  int last_jpeg_message;    /* Table contains strings 0..last_jpeg_message */
672  /* Second table can be added by application (see cjpeg/djpeg for example).
673   * It contains strings numbered first_addon_message..last_addon_message.
674   */
675  const char * const * addon_message_table; /* Non-library errors */
676  int first_addon_message;      /* code for first string in addon table */
677  int last_addon_message;       /* code for last string in addon table */
678};
679
680
681/* Progress monitor object */
682
683struct jpeg_progress_mgr {
684  JMETHOD(void, progress_monitor, (j_common_ptr cinfo));
685
686  long pass_counter;            /* work units completed in this pass */
687  long pass_limit;              /* total number of work units in this pass */
688  int completed_passes;         /* passes completed so far */
689  int total_passes;             /* total number of passes expected */
690};
691
692
693/* Data destination object for compression */
694
695struct jpeg_destination_mgr {
696  JOCTET * next_output_byte;    /* => next byte to write in buffer */
697  size_t free_in_buffer;        /* # of byte spaces remaining in buffer */
698
699  JMETHOD(void, init_destination, (j_compress_ptr cinfo));
700  JMETHOD(boolean, empty_output_buffer, (j_compress_ptr cinfo));
701  JMETHOD(void, term_destination, (j_compress_ptr cinfo));
702};
703
704
705/* Data source object for decompression */
706
707struct jpeg_source_mgr {
708  const JOCTET * next_input_byte; /* => next byte to read from buffer */
709  size_t bytes_in_buffer;       /* # of bytes remaining in buffer */
710
711  JMETHOD(void, init_source, (j_decompress_ptr cinfo));
712  JMETHOD(boolean, fill_input_buffer, (j_decompress_ptr cinfo));
713  JMETHOD(void, skip_input_data, (j_decompress_ptr cinfo, long num_bytes));
714  JMETHOD(boolean, resync_to_restart, (j_decompress_ptr cinfo, int desired));
715  JMETHOD(void, term_source, (j_decompress_ptr cinfo));
716};
717
718
719/* Memory manager object.
720 * Allocates "small" objects (a few K total), "large" objects (tens of K),
721 * and "really big" objects (virtual arrays with backing store if needed).
722 * The memory manager does not allow individual objects to be freed; rather,
723 * each created object is assigned to a pool, and whole pools can be freed
724 * at once.  This is faster and more convenient than remembering exactly what
725 * to free, especially where malloc()/free() are not too speedy.
726 * NB: alloc routines never return NULL.  They exit to error_exit if not
727 * successful.
728 */
729
730#define JPOOL_PERMANENT 0       /* lasts until master record is destroyed */
731#define JPOOL_IMAGE     1       /* lasts until done with image/datastream */
732#define JPOOL_NUMPOOLS  2
733
734typedef struct jvirt_sarray_control * jvirt_sarray_ptr;
735typedef struct jvirt_barray_control * jvirt_barray_ptr;
736
737
738struct jpeg_memory_mgr {
739  /* Method pointers */
740  JMETHOD(void *, alloc_small, (j_common_ptr cinfo, int pool_id,
741                                size_t sizeofobject));
742  JMETHOD(void FAR *, alloc_large, (j_common_ptr cinfo, int pool_id,
743                                     size_t sizeofobject));
744  JMETHOD(JSAMPARRAY, alloc_sarray, (j_common_ptr cinfo, int pool_id,
745                                     JDIMENSION samplesperrow,
746                                     JDIMENSION numrows));
747  JMETHOD(JBLOCKARRAY, alloc_barray, (j_common_ptr cinfo, int pool_id,
748                                      JDIMENSION blocksperrow,
749                                      JDIMENSION numrows));
750  JMETHOD(jvirt_sarray_ptr, request_virt_sarray, (j_common_ptr cinfo,
751                                                  int pool_id,
752                                                  boolean pre_zero,
753                                                  JDIMENSION samplesperrow,
754                                                  JDIMENSION numrows,
755                                                  JDIMENSION maxaccess));
756  JMETHOD(jvirt_barray_ptr, request_virt_barray, (j_common_ptr cinfo,
757                                                  int pool_id,
758                                                  boolean pre_zero,
759                                                  JDIMENSION blocksperrow,
760                                                  JDIMENSION numrows,
761                                                  JDIMENSION maxaccess));
762  JMETHOD(void, realize_virt_arrays, (j_common_ptr cinfo));
763  JMETHOD(JSAMPARRAY, access_virt_sarray, (j_common_ptr cinfo,
764                                           jvirt_sarray_ptr ptr,
765                                           JDIMENSION start_row,
766                                           JDIMENSION num_rows,
767                                           boolean writable));
768  JMETHOD(JBLOCKARRAY, access_virt_barray, (j_common_ptr cinfo,
769                                            jvirt_barray_ptr ptr,
770                                            JDIMENSION start_row,
771                                            JDIMENSION num_rows,
772                                            boolean writable));
773  JMETHOD(void, free_pool, (j_common_ptr cinfo, int pool_id));
774  JMETHOD(void, self_destruct, (j_common_ptr cinfo));
775
776  /* Limit on memory allocation for this JPEG object.  (Note that this is
777   * merely advisory, not a guaranteed maximum; it only affects the space
778   * used for virtual-array buffers.)  May be changed by outer application
779   * after creating the JPEG object.
780   */
781  long max_memory_to_use;
782};
783
784
785/* Routine signature for application-supplied marker processing methods.
786 * Need not pass marker code since it is stored in cinfo->unread_marker.
787 */
788typedef JMETHOD(boolean, jpeg_marker_parser_method, (j_decompress_ptr cinfo));
789
790
791/* Declarations for routines called by application.
792 * The JPP macro hides prototype parameters from compilers that can't cope.
793 * Note JPP requires double parentheses.
794 */
795
796#ifdef HAVE_PROTOTYPES
797#define JPP(arglist)    arglist
798#else
799#define JPP(arglist)    ()
800#endif
801
802
803/* Short forms of external names for systems with brain-damaged linkers.
804 * We shorten external names to be unique in the first six letters, which
805 * is good enough for all known systems.
806 * (If your compiler itself needs names to be unique in less than 15
807 * characters, you are out of luck.  Get a better compiler.)
808 */
809
810#ifdef NEED_SHORT_EXTERNAL_NAMES
811#define jpeg_std_error          jStdError
812#define jpeg_CreateCompress     jCreaCompress
813#define jpeg_CreateDecompress   jCreaDecompress
814#define jpeg_destroy_compress   jDestCompress
815#define jpeg_destroy_decompress jDestDecompress
816#define jpeg_stdio_dest         jStdDest
817#define jpeg_stdio_src          jStdSrc
818#define jpeg_set_defaults       jSetDefaults
819#define jpeg_set_colorspace     jSetColorspace
820#define jpeg_default_colorspace jDefColorspace
821#define jpeg_set_quality        jSetQuality
822#define jpeg_set_linear_quality jSetLQuality
823#define jpeg_add_quant_table    jAddQuantTable
824#define jpeg_quality_scaling    jQualityScaling
825#define jpeg_simple_progression jSimProgress
826#define jpeg_suppress_tables    jSuppressTables
827#define jpeg_alloc_quant_table  jAlcQTable
828#define jpeg_alloc_huff_table   jAlcHTable
829#define jpeg_start_compress     jStrtCompress
830#define jpeg_write_scanlines    jWrtScanlines
831#define jpeg_finish_compress    jFinCompress
832#define jpeg_write_raw_data     jWrtRawData
833#define jpeg_write_marker       jWrtMarker
834#define jpeg_write_tables       jWrtTables
835#define jpeg_read_header        jReadHeader
836#define jpeg_start_decompress   jStrtDecompress
837#define jpeg_read_scanlines     jReadScanlines
838#define jpeg_finish_decompress  jFinDecompress
839#define jpeg_read_raw_data      jReadRawData
840#define jpeg_has_multiple_scans jHasMultScn
841#define jpeg_start_output       jStrtOutput
842#define jpeg_finish_output      jFinOutput
843#define jpeg_input_complete     jInComplete
844#define jpeg_new_colormap       jNewCMap
845#define jpeg_consume_input      jConsumeInput
846#define jpeg_calc_output_dimensions     jCalcDimensions
847#define jpeg_set_marker_processor       jSetMarker
848#define jpeg_read_coefficients  jReadCoefs
849#define jpeg_write_coefficients jWrtCoefs
850#define jpeg_copy_critical_parameters   jCopyCrit
851#define jpeg_abort_compress     jAbrtCompress
852#define jpeg_abort_decompress   jAbrtDecompress
853#define jpeg_abort              jAbort
854#define jpeg_destroy            jDestroy
855#define jpeg_resync_to_restart  jResyncRestart
856#endif /* NEED_SHORT_EXTERNAL_NAMES */
857
858
859/* Default error-management setup */
860EXTERN(struct jpeg_error_mgr *) jpeg_std_error
861        JPP((struct jpeg_error_mgr * err));
862
863/* Initialization of JPEG compression objects.
864 * jpeg_create_compress() and jpeg_create_decompress() are the exported
865 * names that applications should call.  These expand to calls on
866 * jpeg_CreateCompress and jpeg_CreateDecompress with additional information
867 * passed for version mismatch checking.
868 * NB: you must set up the error-manager BEFORE calling jpeg_create_xxx.
869 */
870#define jpeg_create_compress(cinfo) \
871    jpeg_CreateCompress((cinfo), JPEG_LIB_VERSION, \
872                        (size_t) sizeof(struct jpeg_compress_struct))
873#define jpeg_create_decompress(cinfo) \
874    jpeg_CreateDecompress((cinfo), JPEG_LIB_VERSION, \
875                          (size_t) sizeof(struct jpeg_decompress_struct))
876EXTERN(void) jpeg_CreateCompress JPP((j_compress_ptr cinfo,
877                                      int version, size_t structsize));
878EXTERN(void) jpeg_CreateDecompress JPP((j_decompress_ptr cinfo,
879                                        int version, size_t structsize));
880/* Destruction of JPEG compression objects */
881EXTERN(void) jpeg_destroy_compress JPP((j_compress_ptr cinfo));
882EXTERN(void) jpeg_destroy_decompress JPP((j_decompress_ptr cinfo));
883
884/* Standard data source and destination managers: stdio streams. */
885/* Caller is responsible for opening the file before and closing after. */
886EXTERN(void) jpeg_stdio_dest JPP((j_compress_ptr cinfo, FILE * outfile));
887EXTERN(void) jpeg_stdio_src JPP((j_decompress_ptr cinfo, i4_file_class * infile));
888
889/* Default parameter setup for compression */
890EXTERN(void) jpeg_set_defaults JPP((j_compress_ptr cinfo));
891/* Compression parameter setup aids */
892EXTERN(void) jpeg_set_colorspace JPP((j_compress_ptr cinfo,
893                                      J_COLOR_SPACE colorspace));
894EXTERN(void) jpeg_default_colorspace JPP((j_compress_ptr cinfo));
895EXTERN(void) jpeg_set_quality JPP((j_compress_ptr cinfo, int quality,
896                                   boolean force_baseline));
897EXTERN(void) jpeg_set_linear_quality JPP((j_compress_ptr cinfo,
898                                          int scale_factor,
899                                          boolean force_baseline));
900EXTERN(void) jpeg_add_quant_table JPP((j_compress_ptr cinfo, int which_tbl,
901                                       const unsigned int *basic_table,
902                                       int scale_factor,
903                                       boolean force_baseline));
904EXTERN(int) jpeg_quality_scaling JPP((int quality));
905EXTERN(void) jpeg_simple_progression JPP((j_compress_ptr cinfo));
906EXTERN(void) jpeg_suppress_tables JPP((j_compress_ptr cinfo,
907                                       boolean suppress));
908EXTERN(JQUANT_TBL *) jpeg_alloc_quant_table JPP((j_common_ptr cinfo));
909EXTERN(JHUFF_TBL *) jpeg_alloc_huff_table JPP((j_common_ptr cinfo));
910
911/* Main entry points for compression */
912EXTERN(void) jpeg_start_compress JPP((j_compress_ptr cinfo,
913                                      boolean write_all_tables));
914EXTERN(JDIMENSION) jpeg_write_scanlines JPP((j_compress_ptr cinfo,
915                                             JSAMPARRAY scanlines,
916                                             JDIMENSION num_lines));
917EXTERN(void) jpeg_finish_compress JPP((j_compress_ptr cinfo));
918
919/* Replaces jpeg_write_scanlines when writing raw downsampled data. */
920EXTERN(JDIMENSION) jpeg_write_raw_data JPP((j_compress_ptr cinfo,
921                                            JSAMPIMAGE data,
922                                            JDIMENSION num_lines));
923
924/* Write a special marker.  See libjpeg.doc concerning safe usage. */
925EXTERN(void) jpeg_write_marker
926        JPP((j_compress_ptr cinfo, int marker,
927             const JOCTET * dataptr, unsigned int datalen));
928
929/* Alternate compression function: just write an abbreviated table file */
930EXTERN(void) jpeg_write_tables JPP((j_compress_ptr cinfo));
931
932/* Decompression startup: read start of JPEG datastream to see what's there */
933EXTERN(int) jpeg_read_header JPP((j_decompress_ptr cinfo,
934                                  boolean require_image));
935/* Return value is one of: */
936#define JPEG_SUSPENDED          0 /* Suspended due to lack of input data */
937#define JPEG_HEADER_OK          1 /* Found valid image datastream */
938#define JPEG_HEADER_TABLES_ONLY 2 /* Found valid table-specs-only datastream */
939/* If you pass require_image = TRUE (normal case), you need not check for
940 * a TABLES_ONLY return code; an abbreviated file will cause an error exit.
941 * JPEG_SUSPENDED is only possible if you use a data source module that can
942 * give a suspension return (the stdio source module doesn't).
943 */
944
945/* Main entry points for decompression */
946EXTERN(boolean) jpeg_start_decompress JPP((j_decompress_ptr cinfo));
947EXTERN(JDIMENSION) jpeg_read_scanlines JPP((j_decompress_ptr cinfo,
948                                            JSAMPARRAY scanlines,
949                                            JDIMENSION max_lines));
950EXTERN(boolean) jpeg_finish_decompress JPP((j_decompress_ptr cinfo));
951
952/* Replaces jpeg_read_scanlines when reading raw downsampled data. */
953EXTERN(JDIMENSION) jpeg_read_raw_data JPP((j_decompress_ptr cinfo,
954                                           JSAMPIMAGE data,
955                                           JDIMENSION max_lines));
956
957/* Additional entry points for buffered-image mode. */
958EXTERN(boolean) jpeg_has_multiple_scans JPP((j_decompress_ptr cinfo));
959EXTERN(boolean) jpeg_start_output JPP((j_decompress_ptr cinfo,
960                                       int scan_number));
961EXTERN(boolean) jpeg_finish_output JPP((j_decompress_ptr cinfo));
962EXTERN(boolean) jpeg_input_complete JPP((j_decompress_ptr cinfo));
963EXTERN(void) jpeg_new_colormap JPP((j_decompress_ptr cinfo));
964EXTERN(int) jpeg_consume_input JPP((j_decompress_ptr cinfo));
965/* Return value is one of: */
966/* #define JPEG_SUSPENDED       0    Suspended due to lack of input data */
967#define JPEG_REACHED_SOS        1 /* Reached start of new scan */
968#define JPEG_REACHED_EOI        2 /* Reached end of image */
969#define JPEG_ROW_COMPLETED      3 /* Completed one iMCU row */
970#define JPEG_SCAN_COMPLETED     4 /* Completed last iMCU row of a scan */
971
972/* Precalculate output dimensions for current decompression parameters. */
973EXTERN(void) jpeg_calc_output_dimensions JPP((j_decompress_ptr cinfo));
974
975/* Install a special processing method for COM or APPn markers. */
976EXTERN(void) jpeg_set_marker_processor
977        JPP((j_decompress_ptr cinfo, int marker_code,
978             jpeg_marker_parser_method routine));
979
980/* Read or write raw DCT coefficients --- useful for lossless transcoding. */
981EXTERN(jvirt_barray_ptr *) jpeg_read_coefficients JPP((j_decompress_ptr cinfo));
982EXTERN(void) jpeg_write_coefficients JPP((j_compress_ptr cinfo,
983                                          jvirt_barray_ptr * coef_arrays));
984EXTERN(void) jpeg_copy_critical_parameters JPP((j_decompress_ptr srcinfo,
985                                                j_compress_ptr dstinfo));
986
987/* If you choose to abort compression or decompression before completing
988 * jpeg_finish_(de)compress, then you need to clean up to release memory,
989 * temporary files, etc.  You can just call jpeg_destroy_(de)compress
990 * if you're done with the JPEG object, but if you want to clean it up and
991 * reuse it, call this:
992 */
993EXTERN(void) jpeg_abort_compress JPP((j_compress_ptr cinfo));
994EXTERN(void) jpeg_abort_decompress JPP((j_decompress_ptr cinfo));
995
996/* Generic versions of jpeg_abort and jpeg_destroy that work on either
997 * flavor of JPEG object.  These may be more convenient in some places.
998 */
999EXTERN(void) jpeg_abort JPP((j_common_ptr cinfo));
1000EXTERN(void) jpeg_destroy JPP((j_common_ptr cinfo));
1001
1002/* Default restart-marker-resync procedure for use by data source modules */
1003EXTERN(boolean) jpeg_resync_to_restart JPP((j_decompress_ptr cinfo,
1004                                            int desired));
1005
1006
1007/* These marker codes are exported since applications and data source modules
1008 * are likely to want to use them.
1009 */
1010
1011#define JPEG_RST0       0xD0    /* RST0 marker code */
1012#define JPEG_EOI        0xD9    /* EOI marker code */
1013#define JPEG_APP0       0xE0    /* APP0 marker code */
1014#define JPEG_COM        0xFE    /* COM marker code */
1015
1016
1017/* If we have a brain-damaged compiler that emits warnings (or worse, errors)
1018 * for structure definitions that are never filled in, keep it quiet by
1019 * supplying dummy definitions for the various substructures.
1020 */
1021
1022#ifdef INCOMPLETE_TYPES_BROKEN
1023#ifndef JPEG_INTERNALS          /* will be defined in jpegint.h */
1024struct jvirt_sarray_control { long dummy; };
1025struct jvirt_barray_control { long dummy; };
1026struct jpeg_comp_master { long dummy; };
1027struct jpeg_c_main_controller { long dummy; };
1028struct jpeg_c_prep_controller { long dummy; };
1029struct jpeg_c_coef_controller { long dummy; };
1030struct jpeg_marker_writer { long dummy; };
1031struct jpeg_color_converter { long dummy; };
1032struct jpeg_downsampler { long dummy; };
1033struct jpeg_forward_dct { long dummy; };
1034struct jpeg_entropy_encoder { long dummy; };
1035struct jpeg_decomp_master { long dummy; };
1036struct jpeg_d_main_controller { long dummy; };
1037struct jpeg_d_coef_controller { long dummy; };
1038struct jpeg_d_post_controller { long dummy; };
1039struct jpeg_input_controller { long dummy; };
1040struct jpeg_marker_reader { long dummy; };
1041struct jpeg_entropy_decoder { long dummy; };
1042struct jpeg_inverse_dct { long dummy; };
1043struct jpeg_upsampler { long dummy; };
1044struct jpeg_color_deconverter { long dummy; };
1045struct jpeg_color_quantizer { long dummy; };
1046#endif /* JPEG_INTERNALS */
1047#endif /* INCOMPLETE_TYPES_BROKEN */
1048
1049
1050/*
1051 * The JPEG library modules define JPEG_INTERNALS before including this file.
1052 * The internal structure declarations are read only when that is true.
1053 * Applications using the library should not include jpegint.h, but may wish
1054 * to include jerror.h.
1055 */
1056
1057#ifdef JPEG_INTERNALS
1058#include "loaders/jpg/jpegint.h"                /* fetch private declarations */
1059#include "loaders/jpg/jerror.h"         /* fetch error codes too */
1060#endif
1061
1062#endif /* JPEGLIB_H */
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