jpeglib.h (44448B)
1 /* 2 * jpeglib.h 3 * 4 * Copyright (C) 1991-1995, 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 #ifdef __cplusplus 17 extern "C" 18 { 19 #endif 20 21 22 23 #ifdef __MACOS__ 24 25 // JDC: stuff to make mac version compile 26 #define boolean qboolean 27 #define register 28 #define INT32 int 29 30 #endif 31 32 // rad additions 33 // 11.29.99 34 35 //#include "cmdlib.h" 36 #ifdef _WIN32 37 #include "windows.h" 38 #include "stdio.h" 39 #endif 40 41 #ifndef INT32 42 #define INT32 int 43 #endif 44 45 extern void LoadJPGBuff(unsigned char *fbuffer, unsigned char **pic, int *width, int *height ); 46 // rad end 47 48 49 /* 50 * First we include the configuration files that record how this 51 * installation of the JPEG library is set up. jconfig.h can be 52 * generated automatically for many systems. jmorecfg.h contains 53 * manual configuration options that most people need not worry about. 54 */ 55 56 #ifndef JCONFIG_INCLUDED /* in case jinclude.h already did */ 57 #include "jpeg6/jconfig.h" /* widely used configuration options */ 58 #endif 59 #include "jpeg6/jmorecfg.h" /* seldom changed options */ 60 61 62 /* Version ID for the JPEG library. 63 * Might be useful for tests like "#if JPEG_LIB_VERSION >= 60". 64 */ 65 66 #define JPEG_LIB_VERSION 60 /* Version 6 */ 67 68 69 /* Various constants determining the sizes of things. 70 * All of these are specified by the JPEG standard, so don't change them 71 * if you want to be compatible. 72 */ 73 74 #define DCTSIZE 8 /* The basic DCT block is 8x8 samples */ 75 #define DCTSIZE2 64 /* DCTSIZE squared; # of elements in a block */ 76 #define NUM_QUANT_TBLS 4 /* Quantization tables are numbered 0..3 */ 77 #define NUM_HUFF_TBLS 4 /* Huffman tables are numbered 0..3 */ 78 #define NUM_ARITH_TBLS 16 /* Arith-coding tables are numbered 0..15 */ 79 #define MAX_COMPS_IN_SCAN 4 /* JPEG limit on # of components in one scan */ 80 #define MAX_SAMP_FACTOR 4 /* JPEG limit on sampling factors */ 81 /* Unfortunately, some bozo at Adobe saw no reason to be bound by the standard; 82 * the PostScript DCT filter can emit files with many more than 10 blocks/MCU. 83 * If you happen to run across such a file, you can up D_MAX_BLOCKS_IN_MCU 84 * to handle it. We even let you do this from the jconfig.h file. However, 85 * we strongly discourage changing C_MAX_BLOCKS_IN_MCU; just because Adobe 86 * sometimes emits noncompliant files doesn't mean you should too. 87 */ 88 #define C_MAX_BLOCKS_IN_MCU 10 /* compressor's limit on blocks per MCU */ 89 #ifndef D_MAX_BLOCKS_IN_MCU 90 #define D_MAX_BLOCKS_IN_MCU 10 /* decompressor's limit on blocks per MCU */ 91 #endif 92 93 94 /* This macro is used to declare a "method", that is, a function pointer. 95 * We want to supply prototype parameters if the compiler can cope. 96 * Note that the arglist parameter must be parenthesized! 97 */ 98 99 #ifdef HAVE_PROTOTYPES 100 #define JMETHOD(type,methodname,arglist) type (*methodname) arglist 101 #else 102 #define JMETHOD(type,methodname,arglist) type (*methodname) () 103 #endif 104 105 106 /* Data structures for images (arrays of samples and of DCT coefficients). 107 * On 80x86 machines, the image arrays are too big for near pointers, 108 * but the pointer arrays can fit in near memory. 109 */ 110 111 typedef JSAMPLE FAR *JSAMPROW; /* ptr to one image row of pixel samples. */ 112 typedef JSAMPROW *JSAMPARRAY; /* ptr to some rows (a 2-D sample array) */ 113 typedef JSAMPARRAY *JSAMPIMAGE; /* a 3-D sample array: top index is color */ 114 115 typedef JCOEF JBLOCK[DCTSIZE2]; /* one block of coefficients */ 116 typedef JBLOCK FAR *JBLOCKROW; /* pointer to one row of coefficient blocks */ 117 typedef JBLOCKROW *JBLOCKARRAY; /* a 2-D array of coefficient blocks */ 118 typedef JBLOCKARRAY *JBLOCKIMAGE; /* a 3-D array of coefficient blocks */ 119 120 typedef JCOEF FAR *JCOEFPTR; /* useful in a couple of places */ 121 122 123 /* Types for JPEG compression parameters and working tables. */ 124 125 126 /* DCT coefficient quantization tables. */ 127 128 typedef struct { 129 /* This field directly represents the contents of a JPEG DQT marker. 130 * Note: the values are always given in zigzag order. 131 */ 132 UINT16 quantval[DCTSIZE2]; /* quantization step for each coefficient */ 133 /* This field is used only during compression. It's initialized FALSE when 134 * the table is created, and set TRUE when it's been output to the file. 135 * You could suppress output of a table by setting this to TRUE. 136 * (See jpeg_suppress_tables for an example.) 137 */ 138 boolean sent_table; /* TRUE when table has been output */ 139 } JQUANT_TBL; 140 141 142 /* Huffman coding tables. */ 143 144 typedef struct { 145 /* These two fields directly represent the contents of a JPEG DHT marker */ 146 UINT8 bits[17]; /* bits[k] = # of symbols with codes of */ 147 /* length k bits; bits[0] is unused */ 148 UINT8 huffval[256]; /* The symbols, in order of incr code length */ 149 /* This field is used only during compression. It's initialized FALSE when 150 * the table is created, and set TRUE when it's been output to the file. 151 * You could suppress output of a table by setting this to TRUE. 152 * (See jpeg_suppress_tables for an example.) 153 */ 154 boolean sent_table; /* TRUE when table has been output */ 155 } JHUFF_TBL; 156 157 158 /* Basic info about one component (color channel). */ 159 160 typedef struct { 161 /* These values are fixed over the whole image. */ 162 /* For compression, they must be supplied by parameter setup; */ 163 /* for decompression, they are read from the SOF marker. */ 164 int component_id; /* identifier for this component (0..255) */ 165 int component_index; /* its index in SOF or cinfo->comp_info[] */ 166 int h_samp_factor; /* horizontal sampling factor (1..4) */ 167 int v_samp_factor; /* vertical sampling factor (1..4) */ 168 int quant_tbl_no; /* quantization table selector (0..3) */ 169 /* These values may vary between scans. */ 170 /* For compression, they must be supplied by parameter setup; */ 171 /* for decompression, they are read from the SOS marker. */ 172 /* The decompressor output side may not use these variables. */ 173 int dc_tbl_no; /* DC entropy table selector (0..3) */ 174 int ac_tbl_no; /* AC entropy table selector (0..3) */ 175 176 /* Remaining fields should be treated as private by applications. */ 177 178 /* These values are computed during compression or decompression startup: */ 179 /* Component's size in DCT blocks. 180 * Any dummy blocks added to complete an MCU are not counted; therefore 181 * these values do not depend on whether a scan is interleaved or not. 182 */ 183 JDIMENSION width_in_blocks; 184 JDIMENSION height_in_blocks; 185 /* Size of a DCT block in samples. Always DCTSIZE for compression. 186 * For decompression this is the size of the output from one DCT block, 187 * reflecting any scaling we choose to apply during the IDCT step. 188 * Values of 1,2,4,8 are likely to be supported. Note that different 189 * components may receive different IDCT scalings. 190 */ 191 int DCT_scaled_size; 192 /* The downsampled dimensions are the component's actual, unpadded number 193 * of samples at the main buffer (preprocessing/compression interface), thus 194 * downsampled_width = ceil(image_width * Hi/Hmax) 195 * and similarly for height. For decompression, IDCT scaling is included, so 196 * downsampled_width = ceil(image_width * Hi/Hmax * DCT_scaled_size/DCTSIZE) 197 */ 198 JDIMENSION downsampled_width; /* actual width in samples */ 199 JDIMENSION downsampled_height; /* actual height in samples */ 200 /* This flag is used only for decompression. In cases where some of the 201 * components will be ignored (eg grayscale output from YCbCr image), 202 * we can skip most computations for the unused components. 203 */ 204 boolean component_needed; /* do we need the value of this component? */ 205 206 /* These values are computed before starting a scan of the component. */ 207 /* The decompressor output side may not use these variables. */ 208 int MCU_width; /* number of blocks per MCU, horizontally */ 209 int MCU_height; /* number of blocks per MCU, vertically */ 210 int MCU_blocks; /* MCU_width * MCU_height */ 211 int MCU_sample_width; /* MCU width in samples, MCU_width*DCT_scaled_size */ 212 int last_col_width; /* # of non-dummy blocks across in last MCU */ 213 int last_row_height; /* # of non-dummy blocks down in last MCU */ 214 215 /* Saved quantization table for component; NULL if none yet saved. 216 * See jdinput.c comments about the need for this information. 217 * This field is not currently used by the compressor. 218 */ 219 JQUANT_TBL * quant_table; 220 221 /* Private per-component storage for DCT or IDCT subsystem. */ 222 void * dct_table; 223 } jpeg_component_info; 224 225 226 /* The script for encoding a multiple-scan file is an array of these: */ 227 228 typedef struct { 229 int comps_in_scan; /* number of components encoded in this scan */ 230 int component_index[MAX_COMPS_IN_SCAN]; /* their SOF/comp_info[] indexes */ 231 int Ss, Se; /* progressive JPEG spectral selection parms */ 232 int Ah, Al; /* progressive JPEG successive approx. parms */ 233 } jpeg_scan_info; 234 235 236 /* Known color spaces. */ 237 238 typedef enum { 239 JCS_UNKNOWN, /* error/unspecified */ 240 JCS_GRAYSCALE, /* monochrome */ 241 JCS_RGB, /* red/green/blue */ 242 JCS_YCbCr, /* Y/Cb/Cr (also known as YUV) */ 243 JCS_CMYK, /* C/M/Y/K */ 244 JCS_YCCK /* Y/Cb/Cr/K */ 245 } J_COLOR_SPACE; 246 247 /* DCT/IDCT algorithm options. */ 248 249 typedef enum { 250 JDCT_ISLOW, /* slow but accurate integer algorithm */ 251 JDCT_IFAST, /* faster, less accurate integer method */ 252 JDCT_FLOAT /* floating-point: accurate, fast on fast HW */ 253 } J_DCT_METHOD; 254 255 #ifndef JDCT_DEFAULT /* may be overridden in jconfig.h */ 256 #define JDCT_DEFAULT JDCT_ISLOW 257 #endif 258 #ifndef JDCT_FASTEST /* may be overridden in jconfig.h */ 259 #define JDCT_FASTEST JDCT_IFAST 260 #endif 261 262 /* Dithering options for decompression. */ 263 264 typedef enum { 265 JDITHER_NONE, /* no dithering */ 266 JDITHER_ORDERED, /* simple ordered dither */ 267 JDITHER_FS /* Floyd-Steinberg error diffusion dither */ 268 } J_DITHER_MODE; 269 270 271 /* Common fields between JPEG compression and decompression master structs. */ 272 273 #define jpeg_common_fields \ 274 struct jpeg_error_mgr * err; /* Error handler module */\ 275 struct jpeg_memory_mgr * mem; /* Memory manager module */\ 276 struct jpeg_progress_mgr * progress; /* Progress monitor, or NULL if none */\ 277 boolean is_decompressor; /* so common code can tell which is which */\ 278 int global_state /* for checking call sequence validity */ 279 280 /* Routines that are to be used by both halves of the library are declared 281 * to receive a pointer to this structure. There are no actual instances of 282 * jpeg_common_struct, only of jpeg_compress_struct and jpeg_decompress_struct. 283 */ 284 struct jpeg_common_struct { 285 jpeg_common_fields; /* Fields common to both master struct types */ 286 /* Additional fields follow in an actual jpeg_compress_struct or 287 * jpeg_decompress_struct. All three structs must agree on these 288 * initial fields! (This would be a lot cleaner in C++.) 289 */ 290 }; 291 292 typedef struct jpeg_common_struct * j_common_ptr; 293 typedef struct jpeg_compress_struct * j_compress_ptr; 294 typedef struct jpeg_decompress_struct * j_decompress_ptr; 295 296 297 /* Master record for a compression instance */ 298 299 struct jpeg_compress_struct { 300 jpeg_common_fields; /* Fields shared with jpeg_decompress_struct */ 301 302 /* Destination for compressed data */ 303 struct jpeg_destination_mgr * dest; 304 305 /* Description of source image --- these fields must be filled in by 306 * outer application before starting compression. in_color_space must 307 * be correct before you can even call jpeg_set_defaults(). 308 */ 309 310 JDIMENSION image_width; /* input image width */ 311 JDIMENSION image_height; /* input image height */ 312 int input_components; /* # of color components in input image */ 313 J_COLOR_SPACE in_color_space; /* colorspace of input image */ 314 315 double input_gamma; /* image gamma of input image */ 316 317 /* Compression parameters --- these fields must be set before calling 318 * jpeg_start_compress(). We recommend calling jpeg_set_defaults() to 319 * initialize everything to reasonable defaults, then changing anything 320 * the application specifically wants to change. That way you won't get 321 * burnt when new parameters are added. Also note that there are several 322 * helper routines to simplify changing parameters. 323 */ 324 325 int data_precision; /* bits of precision in image data */ 326 327 int num_components; /* # of color components in JPEG image */ 328 J_COLOR_SPACE jpeg_color_space; /* colorspace of JPEG image */ 329 330 jpeg_component_info * comp_info; 331 /* comp_info[i] describes component that appears i'th in SOF */ 332 333 JQUANT_TBL * quant_tbl_ptrs[NUM_QUANT_TBLS]; 334 /* ptrs to coefficient quantization tables, or NULL if not defined */ 335 336 JHUFF_TBL * dc_huff_tbl_ptrs[NUM_HUFF_TBLS]; 337 JHUFF_TBL * ac_huff_tbl_ptrs[NUM_HUFF_TBLS]; 338 /* ptrs to Huffman coding tables, or NULL if not defined */ 339 340 UINT8 arith_dc_L[NUM_ARITH_TBLS]; /* L values for DC arith-coding tables */ 341 UINT8 arith_dc_U[NUM_ARITH_TBLS]; /* U values for DC arith-coding tables */ 342 UINT8 arith_ac_K[NUM_ARITH_TBLS]; /* Kx values for AC arith-coding tables */ 343 344 int num_scans; /* # of entries in scan_info array */ 345 const jpeg_scan_info * scan_info; /* script for multi-scan file, or NULL */ 346 /* The default value of scan_info is NULL, which causes a single-scan 347 * sequential JPEG file to be emitted. To create a multi-scan file, 348 * set num_scans and scan_info to point to an array of scan definitions. 349 */ 350 351 boolean raw_data_in; /* TRUE=caller supplies downsampled data */ 352 boolean arith_code; /* TRUE=arithmetic coding, FALSE=Huffman */ 353 boolean optimize_coding; /* TRUE=optimize entropy encoding parms */ 354 boolean CCIR601_sampling; /* TRUE=first samples are cosited */ 355 int smoothing_factor; /* 1..100, or 0 for no input smoothing */ 356 J_DCT_METHOD dct_method; /* DCT algorithm selector */ 357 358 /* The restart interval can be specified in absolute MCUs by setting 359 * restart_interval, or in MCU rows by setting restart_in_rows 360 * (in which case the correct restart_interval will be figured 361 * for each scan). 362 */ 363 unsigned int restart_interval; /* MCUs per restart, or 0 for no restart */ 364 int restart_in_rows; /* if > 0, MCU rows per restart interval */ 365 366 /* Parameters controlling emission of special markers. */ 367 368 boolean write_JFIF_header; /* should a JFIF marker be written? */ 369 /* These three values are not used by the JPEG code, merely copied */ 370 /* into the JFIF APP0 marker. density_unit can be 0 for unknown, */ 371 /* 1 for dots/inch, or 2 for dots/cm. Note that the pixel aspect */ 372 /* ratio is defined by X_density/Y_density even when density_unit=0. */ 373 UINT8 density_unit; /* JFIF code for pixel size units */ 374 UINT16 X_density; /* Horizontal pixel density */ 375 UINT16 Y_density; /* Vertical pixel density */ 376 boolean write_Adobe_marker; /* should an Adobe marker be written? */ 377 378 /* State variable: index of next scanline to be written to 379 * jpeg_write_scanlines(). Application may use this to control its 380 * processing loop, e.g., "while (next_scanline < image_height)". 381 */ 382 383 JDIMENSION next_scanline; /* 0 .. image_height-1 */ 384 385 /* Remaining fields are known throughout compressor, but generally 386 * should not be touched by a surrounding application. 387 */ 388 389 /* 390 * These fields are computed during compression startup 391 */ 392 boolean progressive_mode; /* TRUE if scan script uses progressive mode */ 393 int max_h_samp_factor; /* largest h_samp_factor */ 394 int max_v_samp_factor; /* largest v_samp_factor */ 395 396 JDIMENSION total_iMCU_rows; /* # of iMCU rows to be input to coef ctlr */ 397 /* The coefficient controller receives data in units of MCU rows as defined 398 * for fully interleaved scans (whether the JPEG file is interleaved or not). 399 * There are v_samp_factor * DCTSIZE sample rows of each component in an 400 * "iMCU" (interleaved MCU) row. 401 */ 402 403 /* 404 * These fields are valid during any one scan. 405 * They describe the components and MCUs actually appearing in the scan. 406 */ 407 int comps_in_scan; /* # of JPEG components in this scan */ 408 jpeg_component_info * cur_comp_info[MAX_COMPS_IN_SCAN]; 409 /* *cur_comp_info[i] describes component that appears i'th in SOS */ 410 411 JDIMENSION MCUs_per_row; /* # of MCUs across the image */ 412 JDIMENSION MCU_rows_in_scan; /* # of MCU rows in the image */ 413 414 int blocks_in_MCU; /* # of DCT blocks per MCU */ 415 int MCU_membership[C_MAX_BLOCKS_IN_MCU]; 416 /* MCU_membership[i] is index in cur_comp_info of component owning */ 417 /* i'th block in an MCU */ 418 419 int Ss, Se, Ah, Al; /* progressive JPEG parameters for scan */ 420 421 /* 422 * Links to compression subobjects (methods and private variables of modules) 423 */ 424 struct jpeg_comp_master * master; 425 struct jpeg_c_main_controller * main; 426 struct jpeg_c_prep_controller * prep; 427 struct jpeg_c_coef_controller * coef; 428 struct jpeg_marker_writer * marker; 429 struct jpeg_color_converter * cconvert; 430 struct jpeg_downsampler * downsample; 431 struct jpeg_forward_dct * fdct; 432 struct jpeg_entropy_encoder * entropy; 433 }; 434 435 436 /* Master record for a decompression instance */ 437 438 struct jpeg_decompress_struct { 439 jpeg_common_fields; /* Fields shared with jpeg_compress_struct */ 440 441 /* Source of compressed data */ 442 struct jpeg_source_mgr * src; 443 444 /* Basic description of image --- filled in by jpeg_read_header(). */ 445 /* Application may inspect these values to decide how to process image. */ 446 447 JDIMENSION image_width; /* nominal image width (from SOF marker) */ 448 JDIMENSION image_height; /* nominal image height */ 449 int num_components; /* # of color components in JPEG image */ 450 J_COLOR_SPACE jpeg_color_space; /* colorspace of JPEG image */ 451 452 /* Decompression processing parameters --- these fields must be set before 453 * calling jpeg_start_decompress(). Note that jpeg_read_header() initializes 454 * them to default values. 455 */ 456 457 J_COLOR_SPACE out_color_space; /* colorspace for output */ 458 459 unsigned int scale_num, scale_denom; /* fraction by which to scale image */ 460 461 double output_gamma; /* image gamma wanted in output */ 462 463 boolean buffered_image; /* TRUE=multiple output passes */ 464 boolean raw_data_out; /* TRUE=downsampled data wanted */ 465 466 J_DCT_METHOD dct_method; /* IDCT algorithm selector */ 467 boolean do_fancy_upsampling; /* TRUE=apply fancy upsampling */ 468 boolean do_block_smoothing; /* TRUE=apply interblock smoothing */ 469 470 boolean quantize_colors; /* TRUE=colormapped output wanted */ 471 /* the following are ignored if not quantize_colors: */ 472 J_DITHER_MODE dither_mode; /* type of color dithering to use */ 473 boolean two_pass_quantize; /* TRUE=use two-pass color quantization */ 474 int desired_number_of_colors; /* max # colors to use in created colormap */ 475 /* these are significant only in buffered-image mode: */ 476 boolean enable_1pass_quant; /* enable future use of 1-pass quantizer */ 477 boolean enable_external_quant;/* enable future use of external colormap */ 478 boolean enable_2pass_quant; /* enable future use of 2-pass quantizer */ 479 480 /* Description of actual output image that will be returned to application. 481 * These fields are computed by jpeg_start_decompress(). 482 * You can also use jpeg_calc_output_dimensions() to determine these values 483 * in advance of calling jpeg_start_decompress(). 484 */ 485 486 JDIMENSION output_width; /* scaled image width */ 487 JDIMENSION output_height; /* scaled image height */ 488 int out_color_components; /* # of color components in out_color_space */ 489 int output_components; /* # of color components returned */ 490 /* output_components is 1 (a colormap index) when quantizing colors; 491 * otherwise it equals out_color_components. 492 */ 493 int rec_outbuf_height; /* min recommended height of scanline buffer */ 494 /* If the buffer passed to jpeg_read_scanlines() is less than this many rows 495 * high, space and time will be wasted due to unnecessary data copying. 496 * Usually rec_outbuf_height will be 1 or 2, at most 4. 497 */ 498 499 /* When quantizing colors, the output colormap is described by these fields. 500 * The application can supply a colormap by setting colormap non-NULL before 501 * calling jpeg_start_decompress; otherwise a colormap is created during 502 * jpeg_start_decompress or jpeg_start_output. 503 * The map has out_color_components rows and actual_number_of_colors columns. 504 */ 505 int actual_number_of_colors; /* number of entries in use */ 506 JSAMPARRAY colormap; /* The color map as a 2-D pixel array */ 507 508 /* State variables: these variables indicate the progress of decompression. 509 * The application may examine these but must not modify them. 510 */ 511 512 /* Row index of next scanline to be read from jpeg_read_scanlines(). 513 * Application may use this to control its processing loop, e.g., 514 * "while (output_scanline < output_height)". 515 */ 516 JDIMENSION output_scanline; /* 0 .. output_height-1 */ 517 518 /* Current input scan number and number of iMCU rows completed in scan. 519 * These indicate the progress of the decompressor input side. 520 */ 521 int input_scan_number; /* Number of SOS markers seen so far */ 522 JDIMENSION input_iMCU_row; /* Number of iMCU rows completed */ 523 524 /* The "output scan number" is the notional scan being displayed by the 525 * output side. The decompressor will not allow output scan/row number 526 * to get ahead of input scan/row, but it can fall arbitrarily far behind. 527 */ 528 int output_scan_number; /* Nominal scan number being displayed */ 529 JDIMENSION output_iMCU_row; /* Number of iMCU rows read */ 530 531 /* Current progression status. coef_bits[c][i] indicates the precision 532 * with which component c's DCT coefficient i (in zigzag order) is known. 533 * It is -1 when no data has yet been received, otherwise it is the point 534 * transform (shift) value for the most recent scan of the coefficient 535 * (thus, 0 at completion of the progression). 536 * This pointer is NULL when reading a non-progressive file. 537 */ 538 int (*coef_bits)[DCTSIZE2]; /* -1 or current Al value for each coef */ 539 540 /* Internal JPEG parameters --- the application usually need not look at 541 * these fields. Note that the decompressor output side may not use 542 * any parameters that can change between scans. 543 */ 544 545 /* Quantization and Huffman tables are carried forward across input 546 * datastreams when processing abbreviated JPEG datastreams. 547 */ 548 549 JQUANT_TBL * quant_tbl_ptrs[NUM_QUANT_TBLS]; 550 /* ptrs to coefficient quantization tables, or NULL if not defined */ 551 552 JHUFF_TBL * dc_huff_tbl_ptrs[NUM_HUFF_TBLS]; 553 JHUFF_TBL * ac_huff_tbl_ptrs[NUM_HUFF_TBLS]; 554 /* ptrs to Huffman coding tables, or NULL if not defined */ 555 556 /* These parameters are never carried across datastreams, since they 557 * are given in SOF/SOS markers or defined to be reset by SOI. 558 */ 559 560 int data_precision; /* bits of precision in image data */ 561 562 jpeg_component_info * comp_info; 563 /* comp_info[i] describes component that appears i'th in SOF */ 564 565 boolean progressive_mode; /* TRUE if SOFn specifies progressive mode */ 566 boolean arith_code; /* TRUE=arithmetic coding, FALSE=Huffman */ 567 568 UINT8 arith_dc_L[NUM_ARITH_TBLS]; /* L values for DC arith-coding tables */ 569 UINT8 arith_dc_U[NUM_ARITH_TBLS]; /* U values for DC arith-coding tables */ 570 UINT8 arith_ac_K[NUM_ARITH_TBLS]; /* Kx values for AC arith-coding tables */ 571 572 unsigned int restart_interval; /* MCUs per restart interval, or 0 for no restart */ 573 574 /* These fields record data obtained from optional markers recognized by 575 * the JPEG library. 576 */ 577 boolean saw_JFIF_marker; /* TRUE iff a JFIF APP0 marker was found */ 578 /* Data copied from JFIF marker: */ 579 UINT8 density_unit; /* JFIF code for pixel size units */ 580 UINT16 X_density; /* Horizontal pixel density */ 581 UINT16 Y_density; /* Vertical pixel density */ 582 boolean saw_Adobe_marker; /* TRUE iff an Adobe APP14 marker was found */ 583 UINT8 Adobe_transform; /* Color transform code from Adobe marker */ 584 585 boolean CCIR601_sampling; /* TRUE=first samples are cosited */ 586 587 /* Remaining fields are known throughout decompressor, but generally 588 * should not be touched by a surrounding application. 589 */ 590 591 /* 592 * These fields are computed during decompression startup 593 */ 594 int max_h_samp_factor; /* largest h_samp_factor */ 595 int max_v_samp_factor; /* largest v_samp_factor */ 596 597 int min_DCT_scaled_size; /* smallest DCT_scaled_size of any component */ 598 599 JDIMENSION total_iMCU_rows; /* # of iMCU rows in image */ 600 /* The coefficient controller's input and output progress is measured in 601 * units of "iMCU" (interleaved MCU) rows. These are the same as MCU rows 602 * in fully interleaved JPEG scans, but are used whether the scan is 603 * interleaved or not. We define an iMCU row as v_samp_factor DCT block 604 * rows of each component. Therefore, the IDCT output contains 605 * v_samp_factor*DCT_scaled_size sample rows of a component per iMCU row. 606 */ 607 608 JSAMPLE * sample_range_limit; /* table for fast range-limiting */ 609 610 /* 611 * These fields are valid during any one scan. 612 * They describe the components and MCUs actually appearing in the scan. 613 * Note that the decompressor output side must not use these fields. 614 */ 615 int comps_in_scan; /* # of JPEG components in this scan */ 616 jpeg_component_info * cur_comp_info[MAX_COMPS_IN_SCAN]; 617 /* *cur_comp_info[i] describes component that appears i'th in SOS */ 618 619 JDIMENSION MCUs_per_row; /* # of MCUs across the image */ 620 JDIMENSION MCU_rows_in_scan; /* # of MCU rows in the image */ 621 622 int blocks_in_MCU; /* # of DCT blocks per MCU */ 623 int MCU_membership[D_MAX_BLOCKS_IN_MCU]; 624 /* MCU_membership[i] is index in cur_comp_info of component owning */ 625 /* i'th block in an MCU */ 626 627 int Ss, Se, Ah, Al; /* progressive JPEG parameters for scan */ 628 629 /* This field is shared between entropy decoder and marker parser. 630 * It is either zero or the code of a JPEG marker that has been 631 * read from the data source, but has not yet been processed. 632 */ 633 int unread_marker; 634 635 /* 636 * Links to decompression subobjects (methods, private variables of modules) 637 */ 638 struct jpeg_decomp_master * master; 639 struct jpeg_d_main_controller * main; 640 struct jpeg_d_coef_controller * coef; 641 struct jpeg_d_post_controller * post; 642 struct jpeg_input_controller * inputctl; 643 struct jpeg_marker_reader * marker; 644 struct jpeg_entropy_decoder * entropy; 645 struct jpeg_inverse_dct * idct; 646 struct jpeg_upsampler * upsample; 647 struct jpeg_color_deconverter * cconvert; 648 struct jpeg_color_quantizer * cquantize; 649 }; 650 651 652 /* "Object" declarations for JPEG modules that may be supplied or called 653 * directly by the surrounding application. 654 * As with all objects in the JPEG library, these structs only define the 655 * publicly visible methods and state variables of a module. Additional 656 * private fields may exist after the public ones. 657 */ 658 659 660 /* Error handler object */ 661 662 struct jpeg_error_mgr { 663 /* Error exit handler: does not return to caller */ 664 JMETHOD(void, error_exit, (j_common_ptr cinfo)); 665 /* Conditionally emit a trace or warning message */ 666 JMETHOD(void, emit_message, (j_common_ptr cinfo, int msg_level)); 667 /* Routine that actually outputs a trace or error message */ 668 JMETHOD(void, output_message, (j_common_ptr cinfo)); 669 /* Format a message string for the most recent JPEG error or message */ 670 JMETHOD(void, format_message, (j_common_ptr cinfo, char * buffer)); 671 #define JMSG_LENGTH_MAX 200 /* recommended size of format_message buffer */ 672 /* Reset error state variables at start of a new image */ 673 JMETHOD(void, reset_error_mgr, (j_common_ptr cinfo)); 674 675 /* The message ID code and any parameters are saved here. 676 * A message can have one string parameter or up to 8 int parameters. 677 */ 678 int msg_code; 679 #define JMSG_STR_PARM_MAX 80 680 union { 681 int i[8]; 682 char s[JMSG_STR_PARM_MAX]; 683 } msg_parm; 684 685 /* Standard state variables for error facility */ 686 687 int trace_level; /* max msg_level that will be displayed */ 688 689 /* For recoverable corrupt-data errors, we emit a warning message, 690 * but keep going unless emit_message chooses to abort. emit_message 691 * should count warnings in num_warnings. The surrounding application 692 * can check for bad data by seeing if num_warnings is nonzero at the 693 * end of processing. 694 */ 695 long num_warnings; /* number of corrupt-data warnings */ 696 697 /* These fields point to the table(s) of error message strings. 698 * An application can change the table pointer to switch to a different 699 * message list (typically, to change the language in which errors are 700 * reported). Some applications may wish to add additional error codes 701 * that will be handled by the JPEG library error mechanism; the second 702 * table pointer is used for this purpose. 703 * 704 * First table includes all errors generated by JPEG library itself. 705 * Error code 0 is reserved for a "no such error string" message. 706 */ 707 const char * const * jpeg_message_table; /* Library errors */ 708 int last_jpeg_message; /* Table contains strings 0..last_jpeg_message */ 709 /* Second table can be added by application (see cjpeg/djpeg for example). 710 * It contains strings numbered first_addon_message..last_addon_message. 711 */ 712 const char * const * addon_message_table; /* Non-library errors */ 713 int first_addon_message; /* code for first string in addon table */ 714 int last_addon_message; /* code for last string in addon table */ 715 }; 716 717 718 /* Progress monitor object */ 719 720 struct jpeg_progress_mgr { 721 JMETHOD(void, progress_monitor, (j_common_ptr cinfo)); 722 723 long pass_counter; /* work units completed in this pass */ 724 long pass_limit; /* total number of work units in this pass */ 725 int completed_passes; /* passes completed so far */ 726 int total_passes; /* total number of passes expected */ 727 }; 728 729 730 /* Data destination object for compression */ 731 732 struct jpeg_destination_mgr { 733 JOCTET * next_output_byte; /* => next byte to write in buffer */ 734 size_t free_in_buffer; /* # of byte spaces remaining in buffer */ 735 736 JMETHOD(void, init_destination, (j_compress_ptr cinfo)); 737 JMETHOD(boolean, empty_output_buffer, (j_compress_ptr cinfo)); 738 JMETHOD(void, term_destination, (j_compress_ptr cinfo)); 739 }; 740 741 742 /* Data source object for decompression */ 743 744 struct jpeg_source_mgr { 745 const JOCTET * next_input_byte; /* => next byte to read from buffer */ 746 size_t bytes_in_buffer; /* # of bytes remaining in buffer */ 747 748 JMETHOD(void, init_source, (j_decompress_ptr cinfo)); 749 JMETHOD(boolean, fill_input_buffer, (j_decompress_ptr cinfo)); 750 JMETHOD(void, skip_input_data, (j_decompress_ptr cinfo, long num_bytes)); 751 JMETHOD(boolean, resync_to_restart, (j_decompress_ptr cinfo, int desired)); 752 JMETHOD(void, term_source, (j_decompress_ptr cinfo)); 753 }; 754 755 756 /* Memory manager object. 757 * Allocates "small" objects (a few K total), "large" objects (tens of K), 758 * and "really big" objects (virtual arrays with backing store if needed). 759 * The memory manager does not allow individual objects to be freed; rather, 760 * each created object is assigned to a pool, and whole pools can be freed 761 * at once. This is faster and more convenient than remembering exactly what 762 * to free, especially where malloc()/free() are not too speedy. 763 * NB: alloc routines never return NULL. They exit to error_exit if not 764 * successful. 765 */ 766 767 #define JPOOL_PERMANENT 0 /* lasts until master record is destroyed */ 768 #define JPOOL_IMAGE 1 /* lasts until done with image/datastream */ 769 #define JPOOL_NUMPOOLS 2 770 771 typedef struct jvirt_sarray_control * jvirt_sarray_ptr; 772 typedef struct jvirt_barray_control * jvirt_barray_ptr; 773 774 775 struct jpeg_memory_mgr { 776 /* Method pointers */ 777 JMETHOD(void *, alloc_small, (j_common_ptr cinfo, int pool_id, 778 size_t sizeofobject)); 779 JMETHOD(void FAR *, alloc_large, (j_common_ptr cinfo, int pool_id, 780 size_t sizeofobject)); 781 JMETHOD(JSAMPARRAY, alloc_sarray, (j_common_ptr cinfo, int pool_id, 782 JDIMENSION samplesperrow, 783 JDIMENSION numrows)); 784 JMETHOD(JBLOCKARRAY, alloc_barray, (j_common_ptr cinfo, int pool_id, 785 JDIMENSION blocksperrow, 786 JDIMENSION numrows)); 787 JMETHOD(jvirt_sarray_ptr, request_virt_sarray, (j_common_ptr cinfo, 788 int pool_id, 789 boolean pre_zero, 790 JDIMENSION samplesperrow, 791 JDIMENSION numrows, 792 JDIMENSION maxaccess)); 793 JMETHOD(jvirt_barray_ptr, request_virt_barray, (j_common_ptr cinfo, 794 int pool_id, 795 boolean pre_zero, 796 JDIMENSION blocksperrow, 797 JDIMENSION numrows, 798 JDIMENSION maxaccess)); 799 JMETHOD(void, realize_virt_arrays, (j_common_ptr cinfo)); 800 JMETHOD(JSAMPARRAY, access_virt_sarray, (j_common_ptr cinfo, 801 jvirt_sarray_ptr ptr, 802 JDIMENSION start_row, 803 JDIMENSION num_rows, 804 boolean writable)); 805 JMETHOD(JBLOCKARRAY, access_virt_barray, (j_common_ptr cinfo, 806 jvirt_barray_ptr ptr, 807 JDIMENSION start_row, 808 JDIMENSION num_rows, 809 boolean writable)); 810 JMETHOD(void, free_pool, (j_common_ptr cinfo, int pool_id)); 811 JMETHOD(void, self_destruct, (j_common_ptr cinfo)); 812 813 /* Limit on memory allocation for this JPEG object. (Note that this is 814 * merely advisory, not a guaranteed maximum; it only affects the space 815 * used for virtual-array buffers.) May be changed by outer application 816 * after creating the JPEG object. 817 */ 818 long max_memory_to_use; 819 }; 820 821 822 /* Routine signature for application-supplied marker processing methods. 823 * Need not pass marker code since it is stored in cinfo->unread_marker. 824 */ 825 typedef JMETHOD(boolean, jpeg_marker_parser_method, (j_decompress_ptr cinfo)); 826 827 828 /* Declarations for routines called by application. 829 * The JPP macro hides prototype parameters from compilers that can't cope. 830 * Note JPP requires double parentheses. 831 */ 832 833 #ifdef HAVE_PROTOTYPES 834 #define JPP(arglist) arglist 835 #else 836 #define JPP(arglist) () 837 #endif 838 839 840 /* Short forms of external names for systems with brain-damaged linkers. 841 * We shorten external names to be unique in the first six letters, which 842 * is good enough for all known systems. 843 * (If your compiler itself needs names to be unique in less than 15 844 * characters, you are out of luck. Get a better compiler.) 845 */ 846 847 #ifdef NEED_SHORT_EXTERNAL_NAMES 848 #define jpeg_std_error jStdError 849 #define jpeg_create_compress jCreaCompress 850 #define jpeg_create_decompress jCreaDecompress 851 #define jpeg_destroy_compress jDestCompress 852 #define jpeg_destroy_decompress jDestDecompress 853 #define jpeg_stdio_dest jStdDest 854 #define jpeg_stdio_src jStdSrc 855 #define jpeg_set_defaults jSetDefaults 856 #define jpeg_set_colorspace jSetColorspace 857 #define jpeg_default_colorspace jDefColorspace 858 #define jpeg_set_quality jSetQuality 859 #define jpeg_set_linear_quality jSetLQuality 860 #define jpeg_add_quant_table jAddQuantTable 861 #define jpeg_quality_scaling jQualityScaling 862 #define jpeg_simple_progression jSimProgress 863 #define jpeg_suppress_tables jSuppressTables 864 #define jpeg_alloc_quant_table jAlcQTable 865 #define jpeg_alloc_huff_table jAlcHTable 866 #define jpeg_start_compress jStrtCompress 867 #define jpeg_write_scanlines jWrtScanlines 868 #define jpeg_finish_compress jFinCompress 869 #define jpeg_write_raw_data jWrtRawData 870 #define jpeg_write_marker jWrtMarker 871 #define jpeg_write_tables jWrtTables 872 #define jpeg_read_header jReadHeader 873 #define jpeg_start_decompress jStrtDecompress 874 #define jpeg_read_scanlines jReadScanlines 875 #define jpeg_finish_decompress jFinDecompress 876 #define jpeg_read_raw_data jReadRawData 877 #define jpeg_has_multiple_scans jHasMultScn 878 #define jpeg_start_output jStrtOutput 879 #define jpeg_finish_output jFinOutput 880 #define jpeg_input_complete jInComplete 881 #define jpeg_new_colormap jNewCMap 882 #define jpeg_consume_input jConsumeInput 883 #define jpeg_calc_output_dimensions jCalcDimensions 884 #define jpeg_set_marker_processor jSetMarker 885 #define jpeg_read_coefficients jReadCoefs 886 #define jpeg_write_coefficients jWrtCoefs 887 #define jpeg_copy_critical_parameters jCopyCrit 888 #define jpeg_abort_compress jAbrtCompress 889 #define jpeg_abort_decompress jAbrtDecompress 890 #define jpeg_abort jAbort 891 #define jpeg_destroy jDestroy 892 #define jpeg_resync_to_restart jResyncRestart 893 #endif /* NEED_SHORT_EXTERNAL_NAMES */ 894 895 896 /* Default error-management setup */ 897 EXTERN struct jpeg_error_mgr *jpeg_std_error JPP((struct jpeg_error_mgr *err)); 898 899 /* Initialization and destruction of JPEG compression objects */ 900 /* NB: you must set up the error-manager BEFORE calling jpeg_create_xxx */ 901 EXTERN void jpeg_create_compress JPP((j_compress_ptr cinfo)); 902 EXTERN void jpeg_create_decompress JPP((j_decompress_ptr cinfo)); 903 EXTERN void jpeg_destroy_compress JPP((j_compress_ptr cinfo)); 904 EXTERN void jpeg_destroy_decompress JPP((j_decompress_ptr cinfo)); 905 906 /* Standard data source and destination managers: stdio streams. */ 907 /* Caller is responsible for opening the file before and closing after. */ 908 EXTERN void jpeg_stdio_dest JPP((j_compress_ptr cinfo, FILE * outfile)); 909 EXTERN void jpeg_stdio_src JPP((j_decompress_ptr cinfo, unsigned char *infile)); 910 911 /* Default parameter setup for compression */ 912 EXTERN void jpeg_set_defaults JPP((j_compress_ptr cinfo)); 913 /* Compression parameter setup aids */ 914 EXTERN void jpeg_set_colorspace JPP((j_compress_ptr cinfo, 915 J_COLOR_SPACE colorspace)); 916 EXTERN void jpeg_default_colorspace JPP((j_compress_ptr cinfo)); 917 EXTERN void jpeg_set_quality JPP((j_compress_ptr cinfo, int quality, 918 boolean force_baseline)); 919 EXTERN void jpeg_set_linear_quality JPP((j_compress_ptr cinfo, 920 int scale_factor, 921 boolean force_baseline)); 922 EXTERN void jpeg_add_quant_table JPP((j_compress_ptr cinfo, int which_tbl, 923 const unsigned int *basic_table, 924 int scale_factor, 925 boolean force_baseline)); 926 EXTERN int jpeg_quality_scaling JPP((int quality)); 927 EXTERN void jpeg_simple_progression JPP((j_compress_ptr cinfo)); 928 EXTERN void jpeg_suppress_tables JPP((j_compress_ptr cinfo, 929 boolean suppress)); 930 EXTERN JQUANT_TBL * jpeg_alloc_quant_table JPP((j_common_ptr cinfo)); 931 EXTERN JHUFF_TBL * jpeg_alloc_huff_table JPP((j_common_ptr cinfo)); 932 933 /* Main entry points for compression */ 934 EXTERN void jpeg_start_compress JPP((j_compress_ptr cinfo, 935 boolean write_all_tables)); 936 EXTERN JDIMENSION jpeg_write_scanlines JPP((j_compress_ptr cinfo, 937 JSAMPARRAY scanlines, 938 JDIMENSION num_lines)); 939 EXTERN void jpeg_finish_compress JPP((j_compress_ptr cinfo)); 940 941 /* Replaces jpeg_write_scanlines when writing raw downsampled data. */ 942 EXTERN JDIMENSION jpeg_write_raw_data JPP((j_compress_ptr cinfo, 943 JSAMPIMAGE data, 944 JDIMENSION num_lines)); 945 946 /* Write a special marker. See libjpeg.doc concerning safe usage. */ 947 EXTERN void jpeg_write_marker JPP((j_compress_ptr cinfo, int marker, 948 const JOCTET *dataptr, unsigned int datalen)); 949 950 /* Alternate compression function: just write an abbreviated table file */ 951 EXTERN void jpeg_write_tables JPP((j_compress_ptr cinfo)); 952 953 /* Decompression startup: read start of JPEG datastream to see what's there */ 954 EXTERN int jpeg_read_header JPP((j_decompress_ptr cinfo, 955 boolean require_image)); 956 /* Return value is one of: */ 957 #define JPEG_SUSPENDED 0 /* Suspended due to lack of input data */ 958 #define JPEG_HEADER_OK 1 /* Found valid image datastream */ 959 #define JPEG_HEADER_TABLES_ONLY 2 /* Found valid table-specs-only datastream */ 960 /* If you pass require_image = TRUE (normal case), you need not check for 961 * a TABLES_ONLY return code; an abbreviated file will cause an error exit. 962 * JPEG_SUSPENDED is only possible if you use a data source module that can 963 * give a suspension return (the stdio source module doesn't). 964 */ 965 966 /* Main entry points for decompression */ 967 EXTERN boolean jpeg_start_decompress JPP((j_decompress_ptr cinfo)); 968 EXTERN JDIMENSION jpeg_read_scanlines JPP((j_decompress_ptr cinfo, 969 JSAMPARRAY scanlines, 970 JDIMENSION max_lines)); 971 EXTERN boolean jpeg_finish_decompress JPP((j_decompress_ptr cinfo)); 972 973 /* Replaces jpeg_read_scanlines when reading raw downsampled data. */ 974 EXTERN JDIMENSION jpeg_read_raw_data JPP((j_decompress_ptr cinfo, 975 JSAMPIMAGE data, 976 JDIMENSION max_lines)); 977 978 /* Additional entry points for buffered-image mode. */ 979 EXTERN boolean jpeg_has_multiple_scans JPP((j_decompress_ptr cinfo)); 980 EXTERN boolean jpeg_start_output JPP((j_decompress_ptr cinfo, 981 int scan_number)); 982 EXTERN boolean jpeg_finish_output JPP((j_decompress_ptr cinfo)); 983 EXTERN boolean jpeg_input_complete JPP((j_decompress_ptr cinfo)); 984 EXTERN void jpeg_new_colormap JPP((j_decompress_ptr cinfo)); 985 EXTERN int jpeg_consume_input JPP((j_decompress_ptr cinfo)); 986 /* Return value is one of: */ 987 /* #define JPEG_SUSPENDED 0 Suspended due to lack of input data */ 988 #define JPEG_REACHED_SOS 1 /* Reached start of new scan */ 989 #define JPEG_REACHED_EOI 2 /* Reached end of image */ 990 #define JPEG_ROW_COMPLETED 3 /* Completed one iMCU row */ 991 #define JPEG_SCAN_COMPLETED 4 /* Completed last iMCU row of a scan */ 992 993 /* Precalculate output dimensions for current decompression parameters. */ 994 EXTERN void jpeg_calc_output_dimensions JPP((j_decompress_ptr cinfo)); 995 996 /* Install a special processing method for COM or APPn markers. */ 997 EXTERN void jpeg_set_marker_processor JPP((j_decompress_ptr cinfo, 998 int marker_code, 999 jpeg_marker_parser_method routine)); 1000 1001 /* Read or write raw DCT coefficients --- useful for lossless transcoding. */ 1002 EXTERN jvirt_barray_ptr * jpeg_read_coefficients JPP((j_decompress_ptr cinfo)); 1003 EXTERN void jpeg_write_coefficients JPP((j_compress_ptr cinfo, 1004 jvirt_barray_ptr * coef_arrays)); 1005 EXTERN void jpeg_copy_critical_parameters JPP((j_decompress_ptr srcinfo, 1006 j_compress_ptr dstinfo)); 1007 1008 /* If you choose to abort compression or decompression before completing 1009 * jpeg_finish_(de)compress, then you need to clean up to release memory, 1010 * temporary files, etc. You can just call jpeg_destroy_(de)compress 1011 * if you're done with the JPEG object, but if you want to clean it up and 1012 * reuse it, call this: 1013 */ 1014 EXTERN void jpeg_abort_compress JPP((j_compress_ptr cinfo)); 1015 EXTERN void jpeg_abort_decompress JPP((j_decompress_ptr cinfo)); 1016 1017 /* Generic versions of jpeg_abort and jpeg_destroy that work on either 1018 * flavor of JPEG object. These may be more convenient in some places. 1019 */ 1020 EXTERN void jpeg_abort JPP((j_common_ptr cinfo)); 1021 EXTERN void jpeg_destroy JPP((j_common_ptr cinfo)); 1022 1023 /* Default restart-marker-resync procedure for use by data source modules */ 1024 EXTERN boolean jpeg_resync_to_restart JPP((j_decompress_ptr cinfo, 1025 int desired)); 1026 1027 1028 /* These marker codes are exported since applications and data source modules 1029 * are likely to want to use them. 1030 */ 1031 1032 #define JPEG_RST0 0xD0 /* RST0 marker code */ 1033 #define JPEG_EOI 0xD9 /* EOI marker code */ 1034 #define JPEG_APP0 0xE0 /* APP0 marker code */ 1035 #define JPEG_COM 0xFE /* COM marker code */ 1036 1037 1038 /* If we have a brain-damaged compiler that emits warnings (or worse, errors) 1039 * for structure definitions that are never filled in, keep it quiet by 1040 * supplying dummy definitions for the various substructures. 1041 */ 1042 1043 #ifdef INCOMPLETE_TYPES_BROKEN 1044 #ifndef JPEG_INTERNALS /* will be defined in jpegint.h */ 1045 struct jvirt_sarray_control { long dummy; }; 1046 struct jvirt_barray_control { long dummy; }; 1047 struct jpeg_comp_master { long dummy; }; 1048 struct jpeg_c_main_controller { long dummy; }; 1049 struct jpeg_c_prep_controller { long dummy; }; 1050 struct jpeg_c_coef_controller { long dummy; }; 1051 struct jpeg_marker_writer { long dummy; }; 1052 struct jpeg_color_converter { long dummy; }; 1053 struct jpeg_downsampler { long dummy; }; 1054 struct jpeg_forward_dct { long dummy; }; 1055 struct jpeg_entropy_encoder { long dummy; }; 1056 struct jpeg_decomp_master { long dummy; }; 1057 struct jpeg_d_main_controller { long dummy; }; 1058 struct jpeg_d_coef_controller { long dummy; }; 1059 struct jpeg_d_post_controller { long dummy; }; 1060 struct jpeg_input_controller { long dummy; }; 1061 struct jpeg_marker_reader { long dummy; }; 1062 struct jpeg_entropy_decoder { long dummy; }; 1063 struct jpeg_inverse_dct { long dummy; }; 1064 struct jpeg_upsampler { long dummy; }; 1065 struct jpeg_color_deconverter { long dummy; }; 1066 struct jpeg_color_quantizer { long dummy; }; 1067 #endif /* JPEG_INTERNALS */ 1068 #endif /* INCOMPLETE_TYPES_BROKEN */ 1069 1070 1071 /* 1072 * The JPEG library modules define JPEG_INTERNALS before including this file. 1073 * The internal structure declarations are read only when that is true. 1074 * Applications using the library should not include jpegint.h, but may wish 1075 * to include jerror.h. 1076 */ 1077 1078 #ifdef JPEG_INTERNALS 1079 #include "jpegint.h" /* fetch private declarations */ 1080 #include "jerror.h" /* fetch error codes too */ 1081 #endif 1082 1083 #ifdef __cplusplus 1084 } 1085 #endif 1086 1087 #endif /* JPEGLIB_H */