/*
 * jpeglib.h
 *
 * This file was part of the Independent JPEG Group's software:
 * Copyright (C) 1991-1998, Thomas G. Lane.
 * Modified 2002-2009 by Guido Vollbeding.
 * libjpeg-turbo Modifications:
 * Copyright (C) 2009-2011, 2013-2014, 2016-2017, D. R. Commander.
 * Copyright (C) 2015, Google, Inc.
 * For conditions of distribution and use, see the accompanying README.ijg
 * file.
 *
 * This file defines the application interface for the JPEG library.
 * Most applications using the library need only include this file,
 * and perhaps jerror.h if they want to know the exact error codes.
 */

#ifndef JPEGLIB_H
#define JPEGLIB_H

/*
 * First we include the configuration files that record how this
 * installation of the JPEG library is set up.  jconfig.h can be
 * generated automatically for many systems.  jmorecfg.h contains
 * manual configuration options that most people need not worry about.
 */

#ifndef JCONFIG_INCLUDED        /* in case jinclude.h already did */
#define JPEG_LIB_VERSION 80
#define LIBJPEG_TURBO_VERSION 204

#define C_ARITH_CODING_SUPPORTED
#define D_ARITH_CODING_SUPPORTED
#define MEM_SRCDST_SUPPORTED
/*
#define WITH_SIMD
*/

#define BITS_IN_JSAMPLE  8     /* use 8 or 12 */

#define HAVE_STDDEF_H
#define HAVE_STDLIB_H
#undef NEED_SYS_TYPES_H
#undef NEED_BSD_STRINGS

#define HAVE_UNSIGNED_CHAR
#define HAVE_UNSIGNED_SHORT
#undef INCOMPLETE_TYPES_BROKEN
#undef RIGHT_SHIFT_IS_UNSIGNED
#undef __CHAR_UNSIGNED__

/* Define "boolean" as unsigned char, not int, per Windows custom */
#ifndef __RPCNDR_H__            /* don't conflict if rpcndr.h already read */
typedef unsigned char boolean;
#endif
#define HAVE_BOOLEAN            /* prevent jmorecfg.h from redefining it */

/* Define "INT32" as int, not long, per Windows custom */
#if !(defined(_BASETSD_H_) || defined(_BASETSD_H))   /* don't conflict if basetsd.h already read */
typedef short INT16;
typedef signed int INT32;
#endif
#define XMD_H                   /* prevent jmorecfg.h from redefining it */
#endif
/*
 * jmorecfg.h
 *
 * This file was part of the Independent JPEG Group's software:
 * Copyright (C) 1991-1997, Thomas G. Lane.
 * Modified 1997-2009 by Guido Vollbeding.
 * libjpeg-turbo Modifications:
 * Copyright (C) 2009, 2011, 2014-2015, 2018, D. R. Commander.
 * For conditions of distribution and use, see the accompanying README.ijg
 * file.
 *
 * This file contains additional configuration options that customize the
 * JPEG software for special applications or support machine-dependent
 * optimizations.  Most users will not need to touch this file.
 */


/*
 * Maximum number of components (color channels) allowed in JPEG image.
 * To meet the letter of Rec. ITU-T T.81 | ISO/IEC 10918-1, set this to 255.
 * However, darn few applications need more than 4 channels (maybe 5 for CMYK +
 * alpha mask).  We recommend 10 as a reasonable compromise; use 4 if you are
 * really short on memory.  (Each allowed component costs a hundred or so
 * bytes of storage, whether actually used in an image or not.)
 */

#define MAX_COMPONENTS  10      /* maximum number of image components */


/*
 * Basic data types.
 * You may need to change these if you have a machine with unusual data
 * type sizes; for example, "char" not 8 bits, "short" not 16 bits,
 * or "long" not 32 bits.  We don't care whether "int" is 16 or 32 bits,
 * but it had better be at least 16.
 */

/* Representation of a single sample (pixel element value).
 * We frequently allocate large arrays of these, so it's important to keep
 * them small.  But if you have memory to burn and access to char or short
 * arrays is very slow on your hardware, you might want to change these.
 */

#if BITS_IN_JSAMPLE == 8
/* JSAMPLE should be the smallest type that will hold the values 0..255.
 * You can use a signed char by having GETJSAMPLE mask it with 0xFF.
 */

#ifdef HAVE_UNSIGNED_CHAR

typedef unsigned char JSAMPLE;
#define GETJSAMPLE(value)  ((int)(value))

#else /* not HAVE_UNSIGNED_CHAR */

typedef char JSAMPLE;
#ifdef __CHAR_UNSIGNED__
#define GETJSAMPLE(value)  ((int)(value))
#else
#define GETJSAMPLE(value)  ((int)(value) & 0xFF)
#endif /* __CHAR_UNSIGNED__ */

#endif /* HAVE_UNSIGNED_CHAR */

#define MAXJSAMPLE      255
#define CENTERJSAMPLE   128

#endif /* BITS_IN_JSAMPLE == 8 */


#if BITS_IN_JSAMPLE == 12
/* JSAMPLE should be the smallest type that will hold the values 0..4095.
 * On nearly all machines "short" will do nicely.
 */

typedef short JSAMPLE;
#define GETJSAMPLE(value)  ((int)(value))

#define MAXJSAMPLE      4095
#define CENTERJSAMPLE   2048

#endif /* BITS_IN_JSAMPLE == 12 */


/* Representation of a DCT frequency coefficient.
 * This should be a signed value of at least 16 bits; "short" is usually OK.
 * Again, we allocate large arrays of these, but you can change to int
 * if you have memory to burn and "short" is really slow.
 */

typedef short JCOEF;


/* Compressed datastreams are represented as arrays of JOCTET.
 * These must be EXACTLY 8 bits wide, at least once they are written to
 * external storage.  Note that when using the stdio data source/destination
 * managers, this is also the data type passed to fread/fwrite.
 */

#ifdef HAVE_UNSIGNED_CHAR

typedef unsigned char JOCTET;
#define GETJOCTET(value)  (value)

#else /* not HAVE_UNSIGNED_CHAR */

typedef char JOCTET;
#ifdef __CHAR_UNSIGNED__
#define GETJOCTET(value)  (value)
#else
#define GETJOCTET(value)  ((value) & 0xFF)
#endif /* __CHAR_UNSIGNED__ */

#endif /* HAVE_UNSIGNED_CHAR */


/* These typedefs are used for various table entries and so forth.
 * They must be at least as wide as specified; but making them too big
 * won't cost a huge amount of memory, so we don't provide special
 * extraction code like we did for JSAMPLE.  (In other words, these
 * typedefs live at a different point on the speed/space tradeoff curve.)
 */

/* UINT8 must hold at least the values 0..255. */

#ifdef HAVE_UNSIGNED_CHAR
typedef unsigned char UINT8;
#else /* not HAVE_UNSIGNED_CHAR */
#ifdef __CHAR_UNSIGNED__
typedef char UINT8;
#else /* not __CHAR_UNSIGNED__ */
typedef short UINT8;
#endif /* __CHAR_UNSIGNED__ */
#endif /* HAVE_UNSIGNED_CHAR */

/* UINT16 must hold at least the values 0..65535. */

#ifdef HAVE_UNSIGNED_SHORT
typedef unsigned short UINT16;
#else /* not HAVE_UNSIGNED_SHORT */
typedef unsigned int UINT16;
#endif /* HAVE_UNSIGNED_SHORT */

/* INT16 must hold at least the values -32768..32767. */

#ifndef XMD_H                   /* X11/xmd.h correctly defines INT16 */
typedef short INT16;
#endif

/* INT32 must hold at least signed 32-bit values.
 *
 * NOTE: The INT32 typedef dates back to libjpeg v5 (1994.)  Integers were
 * sometimes 16-bit back then (MS-DOS), which is why INT32 is typedef'd to
 * long.  It also wasn't common (or at least as common) in 1994 for INT32 to be
 * defined by platform headers.  Since then, however, INT32 is defined in
 * several other common places:
 *
 * Xmd.h (X11 header) typedefs INT32 to int on 64-bit platforms and long on
 * 32-bit platforms (i.e always a 32-bit signed type.)
 *
 * basetsd.h (Win32 header) typedefs INT32 to int (always a 32-bit signed type
 * on modern platforms.)
 *
 * qglobal.h (Qt header) typedefs INT32 to int (always a 32-bit signed type on
 * modern platforms.)
 *
 * This is a recipe for conflict, since "long" and "int" aren't always
 * compatible types.  Since the definition of INT32 has technically been part
 * of the libjpeg API for more than 20 years, we can't remove it, but we do not
 * use it internally any longer.  We instead define a separate type (JLONG)
 * for internal use, which ensures that internal behavior will always be the
 * same regardless of any external headers that may be included.
 */

#ifndef XMD_H                   /* X11/xmd.h correctly defines INT32 */
#ifndef _BASETSD_H_             /* Microsoft defines it in basetsd.h */
#ifndef _BASETSD_H              /* MinGW is slightly different */
#ifndef QGLOBAL_H               /* Qt defines it in qglobal.h */
typedef long INT32;
#endif
#endif
#endif
#endif

/* Datatype used for image dimensions.  The JPEG standard only supports
 * images up to 64K*64K due to 16-bit fields in SOF markers.  Therefore
 * "unsigned int" is sufficient on all machines.  However, if you need to
 * handle larger images and you don't mind deviating from the spec, you
 * can change this datatype.  (Note that changing this datatype will
 * potentially require modifying the SIMD code.  The x86-64 SIMD extensions,
 * in particular, assume a 32-bit JDIMENSION.)
 */

typedef unsigned int JDIMENSION;

#define JPEG_MAX_DIMENSION  65500L  /* a tad under 64K to prevent overflows */


/* These macros are used in all function definitions and extern declarations.
 * You could modify them if you need to change function linkage conventions;
 * in particular, you'll need to do that to make the library a Windows DLL.
 * Another application is to make all functions global for use with debuggers
 * or code profilers that require it.
 */

/* a function called through method pointers: */
#define METHODDEF(type)         static type
/* a function used only in its module: */
#define LOCAL(type)             static type
/* a function referenced thru EXTERNs: */
#define GLOBAL(type)            type
/* a reference to a GLOBAL function: */
#define EXTERN(type)            extern type


/* Originally, this macro was used as a way of defining function prototypes
 * for both modern compilers as well as older compilers that did not support
 * prototype parameters.  libjpeg-turbo has never supported these older,
 * non-ANSI compilers, but the macro is still included because there is some
 * software out there that uses it.
 */

#define JMETHOD(type, methodname, arglist)  type (*methodname) arglist


/* libjpeg-turbo no longer supports platforms that have far symbols (MS-DOS),
 * but again, some software relies on this macro.
 */

#undef FAR
#define FAR


/*
 * On a few systems, type boolean and/or its values FALSE, TRUE may appear
 * in standard header files.  Or you may have conflicts with application-
 * specific header files that you want to include together with these files.
 * Defining HAVE_BOOLEAN before including jpeglib.h should make it work.
 */

#ifndef HAVE_BOOLEAN
typedef int boolean;
#endif
#ifndef FALSE                   /* in case these macros already exist */
#define FALSE   0               /* values of boolean */
#endif
#ifndef TRUE
#define TRUE    1
#endif


/*
 * The remaining options affect code selection within the JPEG library,
 * but they don't need to be visible to most applications using the library.
 * To minimize application namespace pollution, the symbols won't be
 * defined unless JPEG_INTERNALS or JPEG_INTERNAL_OPTIONS has been defined.
 */

#ifdef JPEG_INTERNALS
#define JPEG_INTERNAL_OPTIONS
#endif

#ifdef JPEG_INTERNAL_OPTIONS


/*
 * These defines indicate whether to include various optional functions.
 * Undefining some of these symbols will produce a smaller but less capable
 * library.  Note that you can leave certain source files out of the
 * compilation/linking process if you've #undef'd the corresponding symbols.
 * (You may HAVE to do that if your compiler doesn't like null source files.)
 */

/* Capability options common to encoder and decoder: */

#define DCT_ISLOW_SUPPORTED     /* slow but accurate integer algorithm */
#define DCT_IFAST_SUPPORTED     /* faster, less accurate integer method */
#define DCT_FLOAT_SUPPORTED     /* floating-point: accurate, fast on fast HW */

/* Encoder capability options: */

#define C_MULTISCAN_FILES_SUPPORTED /* Multiple-scan JPEG files? */
#define C_PROGRESSIVE_SUPPORTED     /* Progressive JPEG? (Requires MULTISCAN)*/
#define ENTROPY_OPT_SUPPORTED       /* Optimization of entropy coding parms? */
/* Note: if you selected 12-bit data precision, it is dangerous to turn off
 * ENTROPY_OPT_SUPPORTED.  The standard Huffman tables are only good for 8-bit
 * precision, so jchuff.c normally uses entropy optimization to compute
 * usable tables for higher precision.  If you don't want to do optimization,
 * you'll have to supply different default Huffman tables.
 * The exact same statements apply for progressive JPEG: the default tables
 * don't work for progressive mode.  (This may get fixed, however.)
 */
#define INPUT_SMOOTHING_SUPPORTED   /* Input image smoothing option? */

/* Decoder capability options: */

#define D_MULTISCAN_FILES_SUPPORTED /* Multiple-scan JPEG files? */
#define D_PROGRESSIVE_SUPPORTED     /* Progressive JPEG? (Requires MULTISCAN)*/
#define SAVE_MARKERS_SUPPORTED      /* jpeg_save_markers() needed? */
#define BLOCK_SMOOTHING_SUPPORTED   /* Block smoothing? (Progressive only) */
#define IDCT_SCALING_SUPPORTED      /* Output rescaling via IDCT? */
#undef  UPSAMPLE_SCALING_SUPPORTED  /* Output rescaling at upsample stage? */
#define UPSAMPLE_MERGING_SUPPORTED  /* Fast path for sloppy upsampling? */
#define QUANT_1PASS_SUPPORTED       /* 1-pass color quantization? */
#define QUANT_2PASS_SUPPORTED       /* 2-pass color quantization? */

/* more capability options later, no doubt */


/*
 * The RGB_RED, RGB_GREEN, RGB_BLUE, and RGB_PIXELSIZE macros are a vestigial
 * feature of libjpeg.  The idea was that, if an application developer needed
 * to compress from/decompress to a BGR/BGRX/RGBX/XBGR/XRGB buffer, they could
 * change these macros, rebuild libjpeg, and link their application statically
 * with it.  In reality, few people ever did this, because there were some
 * severe restrictions involved (cjpeg and djpeg no longer worked properly,
 * compressing/decompressing RGB JPEGs no longer worked properly, and the color
 * quantizer wouldn't work with pixel sizes other than 3.)  Furthermore, since
 * all of the O/S-supplied versions of libjpeg were built with the default
 * values of RGB_RED, RGB_GREEN, RGB_BLUE, and RGB_PIXELSIZE, many applications
 * have come to regard these values as immutable.
 *
 * The libjpeg-turbo colorspace extensions provide a much cleaner way of
 * compressing from/decompressing to buffers with arbitrary component orders
 * and pixel sizes.  Thus, we do not support changing the values of RGB_RED,
 * RGB_GREEN, RGB_BLUE, or RGB_PIXELSIZE.  In addition to the restrictions
 * listed above, changing these values will also break the SIMD extensions and
 * the regression tests.
 */

#define RGB_RED         0       /* Offset of Red in an RGB scanline element */
#define RGB_GREEN       1       /* Offset of Green */
#define RGB_BLUE        2       /* Offset of Blue */
#define RGB_PIXELSIZE   3       /* JSAMPLEs per RGB scanline element */

#define JPEG_NUMCS  17

#define EXT_RGB_RED         0
#define EXT_RGB_GREEN       1
#define EXT_RGB_BLUE        2
#define EXT_RGB_PIXELSIZE   3

#define EXT_RGBX_RED        0
#define EXT_RGBX_GREEN      1
#define EXT_RGBX_BLUE       2
#define EXT_RGBX_PIXELSIZE  4

#define EXT_BGR_RED         2
#define EXT_BGR_GREEN       1
#define EXT_BGR_BLUE        0
#define EXT_BGR_PIXELSIZE   3

#define EXT_BGRX_RED        2
#define EXT_BGRX_GREEN      1
#define EXT_BGRX_BLUE       0
#define EXT_BGRX_PIXELSIZE  4

#define EXT_XBGR_RED        3
#define EXT_XBGR_GREEN      2
#define EXT_XBGR_BLUE       1
#define EXT_XBGR_PIXELSIZE  4

#define EXT_XRGB_RED        1
#define EXT_XRGB_GREEN      2
#define EXT_XRGB_BLUE       3
#define EXT_XRGB_PIXELSIZE  4

static const int rgb_red[JPEG_NUMCS] = {
  -1, -1, RGB_RED, -1, -1, -1, EXT_RGB_RED, EXT_RGBX_RED,
  EXT_BGR_RED, EXT_BGRX_RED, EXT_XBGR_RED, EXT_XRGB_RED,
  EXT_RGBX_RED, EXT_BGRX_RED, EXT_XBGR_RED, EXT_XRGB_RED,
  -1
};

static const int rgb_green[JPEG_NUMCS] = {
  -1, -1, RGB_GREEN, -1, -1, -1, EXT_RGB_GREEN, EXT_RGBX_GREEN,
  EXT_BGR_GREEN, EXT_BGRX_GREEN, EXT_XBGR_GREEN, EXT_XRGB_GREEN,
  EXT_RGBX_GREEN, EXT_BGRX_GREEN, EXT_XBGR_GREEN, EXT_XRGB_GREEN,
  -1
};

static const int rgb_blue[JPEG_NUMCS] = {
  -1, -1, RGB_BLUE, -1, -1, -1, EXT_RGB_BLUE, EXT_RGBX_BLUE,
  EXT_BGR_BLUE, EXT_BGRX_BLUE, EXT_XBGR_BLUE, EXT_XRGB_BLUE,
  EXT_RGBX_BLUE, EXT_BGRX_BLUE, EXT_XBGR_BLUE, EXT_XRGB_BLUE,
  -1
};

static const int rgb_pixelsize[JPEG_NUMCS] = {
  -1, -1, RGB_PIXELSIZE, -1, -1, -1, EXT_RGB_PIXELSIZE, EXT_RGBX_PIXELSIZE,
  EXT_BGR_PIXELSIZE, EXT_BGRX_PIXELSIZE, EXT_XBGR_PIXELSIZE, EXT_XRGB_PIXELSIZE,
  EXT_RGBX_PIXELSIZE, EXT_BGRX_PIXELSIZE, EXT_XBGR_PIXELSIZE, EXT_XRGB_PIXELSIZE,
  -1
};

/* Definitions for speed-related optimizations. */

/* On some machines (notably 68000 series) "int" is 32 bits, but multiplying
 * two 16-bit shorts is faster than multiplying two ints.  Define MULTIPLIER
 * as short on such a machine.  MULTIPLIER must be at least 16 bits wide.
 */

#ifndef MULTIPLIER
#ifndef WITH_SIMD
#define MULTIPLIER  int         /* type for fastest integer multiply */
#else
#define MULTIPLIER  short       /* prefer 16-bit with SIMD for parellelism */
#endif
#endif


/* FAST_FLOAT should be either float or double, whichever is done faster
 * by your compiler.  (Note that this type is only used in the floating point
 * DCT routines, so it only matters if you've defined DCT_FLOAT_SUPPORTED.)
 */

#ifndef FAST_FLOAT
#define FAST_FLOAT  float
#endif

#endif /* JPEG_INTERNAL_OPTIONS */


#ifdef __cplusplus
#ifndef DONT_USE_EXTERN_C
extern "C" {
#endif
#endif


/* Various constants determining the sizes of things.
 * All of these are specified by the JPEG standard, so don't change them
 * if you want to be compatible.
 */

#define DCTSIZE             8   /* The basic DCT block is 8x8 samples */
#define DCTSIZE2            64  /* DCTSIZE squared; # of elements in a block */
#define NUM_QUANT_TBLS      4   /* Quantization tables are numbered 0..3 */
#define NUM_HUFF_TBLS       4   /* Huffman tables are numbered 0..3 */
#define NUM_ARITH_TBLS      16  /* Arith-coding tables are numbered 0..15 */
#define MAX_COMPS_IN_SCAN   4   /* JPEG limit on # of components in one scan */
#define MAX_SAMP_FACTOR     4   /* JPEG limit on sampling factors */
/* Unfortunately, some bozo at Adobe saw no reason to be bound by the standard;
 * the PostScript DCT filter can emit files with many more than 10 blocks/MCU.
 * If you happen to run across such a file, you can up D_MAX_BLOCKS_IN_MCU
 * to handle it.  We even let you do this from the jconfig.h file.  However,
 * we strongly discourage changing C_MAX_BLOCKS_IN_MCU; just because Adobe
 * sometimes emits noncompliant files doesn't mean you should too.
 */
#define C_MAX_BLOCKS_IN_MCU   10 /* compressor's limit on blocks per MCU */
#ifndef D_MAX_BLOCKS_IN_MCU
#define D_MAX_BLOCKS_IN_MCU   10 /* decompressor's limit on blocks per MCU */
#endif


/* Data structures for images (arrays of samples and of DCT coefficients).
 */

typedef JSAMPLE *JSAMPROW;      /* ptr to one image row of pixel samples. */
typedef JSAMPROW *JSAMPARRAY;   /* ptr to some rows (a 2-D sample array) */
typedef JSAMPARRAY *JSAMPIMAGE; /* a 3-D sample array: top index is color */

typedef JCOEF JBLOCK[DCTSIZE2]; /* one block of coefficients */
typedef JBLOCK *JBLOCKROW;      /* pointer to one row of coefficient blocks */
typedef JBLOCKROW *JBLOCKARRAY;         /* a 2-D array of coefficient blocks */
typedef JBLOCKARRAY *JBLOCKIMAGE;       /* a 3-D array of coefficient blocks */

typedef JCOEF *JCOEFPTR;        /* useful in a couple of places */


/* Types for JPEG compression parameters and working tables. */


/* DCT coefficient quantization tables. */

typedef struct {
  /* This array gives the coefficient quantizers in natural array order
   * (not the zigzag order in which they are stored in a JPEG DQT marker).
   * CAUTION: IJG versions prior to v6a kept this array in zigzag order.
   */
  UINT16 quantval[DCTSIZE2];    /* quantization step for each coefficient */
  /* This field is used only during compression.  It's initialized FALSE when
   * the table is created, and set TRUE when it's been output to the file.
   * You could suppress output of a table by setting this to TRUE.
   * (See jpeg_suppress_tables for an example.)
   */
  boolean sent_table;           /* TRUE when table has been output */
} JQUANT_TBL;


/* Huffman coding tables. */

typedef struct {
  /* These two fields directly represent the contents of a JPEG DHT marker */
  UINT8 bits[17];               /* bits[k] = # of symbols with codes of */
                                /* length k bits; bits[0] is unused */
  UINT8 huffval[256];           /* The symbols, in order of incr code length */
  /* This field is used only during compression.  It's initialized FALSE when
   * the table is created, and set TRUE when it's been output to the file.
   * You could suppress output of a table by setting this to TRUE.
   * (See jpeg_suppress_tables for an example.)
   */
  boolean sent_table;           /* TRUE when table has been output */
} JHUFF_TBL;


/* Basic info about one component (color channel). */

typedef struct {
  /* These values are fixed over the whole image. */
  /* For compression, they must be supplied by parameter setup; */
  /* for decompression, they are read from the SOF marker. */
  int component_id;             /* identifier for this component (0..255) */
  int component_index;          /* its index in SOF or cinfo->comp_info[] */
  int h_samp_factor;            /* horizontal sampling factor (1..4) */
  int v_samp_factor;            /* vertical sampling factor (1..4) */
  int quant_tbl_no;             /* quantization table selector (0..3) */
  /* These values may vary between scans. */
  /* For compression, they must be supplied by parameter setup; */
  /* for decompression, they are read from the SOS marker. */
  /* The decompressor output side may not use these variables. */
  int dc_tbl_no;                /* DC entropy table selector (0..3) */
  int ac_tbl_no;                /* AC entropy table selector (0..3) */

  /* Remaining fields should be treated as private by applications. */

  /* These values are computed during compression or decompression startup: */
  /* Component's size in DCT blocks.
   * Any dummy blocks added to complete an MCU are not counted; therefore
   * these values do not depend on whether a scan is interleaved or not.
   */
  JDIMENSION width_in_blocks;
  JDIMENSION height_in_blocks;
  /* Size of a DCT block in samples.  Always DCTSIZE for compression.
   * For decompression this is the size of the output from one DCT block,
   * reflecting any scaling we choose to apply during the IDCT step.
   * Values from 1 to 16 are supported.
   * Note that different components may receive different IDCT scalings.
   */
#if JPEG_LIB_VERSION >= 70
  int DCT_h_scaled_size;
  int DCT_v_scaled_size;
#else
  int DCT_scaled_size;
#endif
  /* The downsampled dimensions are the component's actual, unpadded number
   * of samples at the main buffer (preprocessing/compression interface), thus
   * downsampled_width = ceil(image_width * Hi/Hmax)
   * and similarly for height.  For decompression, IDCT scaling is included, so
   * downsampled_width = ceil(image_width * Hi/Hmax * DCT_[h_]scaled_size/DCTSIZE)
   */
  JDIMENSION downsampled_width;  /* actual width in samples */
  JDIMENSION downsampled_height; /* actual height in samples */
  /* This flag is used only for decompression.  In cases where some of the
   * components will be ignored (eg grayscale output from YCbCr image),
   * we can skip most computations for the unused components.
   */
  boolean component_needed;     /* do we need the value of this component? */

  /* These values are computed before starting a scan of the component. */
  /* The decompressor output side may not use these variables. */
  int MCU_width;                /* number of blocks per MCU, horizontally */
  int MCU_height;               /* number of blocks per MCU, vertically */
  int MCU_blocks;               /* MCU_width * MCU_height */
  int MCU_sample_width;         /* MCU width in samples, MCU_width*DCT_[h_]scaled_size */
  int last_col_width;           /* # of non-dummy blocks across in last MCU */
  int last_row_height;          /* # of non-dummy blocks down in last MCU */

  /* Saved quantization table for component; NULL if none yet saved.
   * See jdinput.c comments about the need for this information.
   * This field is currently used only for decompression.
   */
  JQUANT_TBL *quant_table;

  /* Private per-component storage for DCT or IDCT subsystem. */
  void *dct_table;
} jpeg_component_info;


/* The script for encoding a multiple-scan file is an array of these: */

typedef struct {
  int comps_in_scan;            /* number of components encoded in this scan */
  int component_index[MAX_COMPS_IN_SCAN]; /* their SOF/comp_info[] indexes */
  int Ss, Se;                   /* progressive JPEG spectral selection parms */
  int Ah, Al;                   /* progressive JPEG successive approx. parms */
} jpeg_scan_info;

/* The decompressor can save APPn and COM markers in a list of these: */

typedef struct jpeg_marker_struct *jpeg_saved_marker_ptr;

struct jpeg_marker_struct {
  jpeg_saved_marker_ptr next;   /* next in list, or NULL */
  UINT8 marker;                 /* marker code: JPEG_COM, or JPEG_APP0+n */
  unsigned int original_length; /* # bytes of data in the file */
  unsigned int data_length;     /* # bytes of data saved at data[] */
  JOCTET *data;                 /* the data contained in the marker */
  /* the marker length word is not counted in data_length or original_length */
};

/* Known color spaces. */

#define JCS_EXTENSIONS  1
#define JCS_ALPHA_EXTENSIONS  1

typedef enum {
  JCS_UNKNOWN,            /* error/unspecified */
  JCS_GRAYSCALE,          /* monochrome */
  JCS_RGB,                /* red/green/blue as specified by the RGB_RED,
                             RGB_GREEN, RGB_BLUE, and RGB_PIXELSIZE macros */
  JCS_YCbCr,              /* Y/Cb/Cr (also known as YUV) */
  JCS_CMYK,               /* C/M/Y/K */
  JCS_YCCK,               /* Y/Cb/Cr/K */
  JCS_EXT_RGB,            /* red/green/blue */
  JCS_EXT_RGBX,           /* red/green/blue/x */
  JCS_EXT_BGR,            /* blue/green/red */
  JCS_EXT_BGRX,           /* blue/green/red/x */
  JCS_EXT_XBGR,           /* x/blue/green/red */
  JCS_EXT_XRGB,           /* x/red/green/blue */
  /* When out_color_space it set to JCS_EXT_RGBX, JCS_EXT_BGRX, JCS_EXT_XBGR,
     or JCS_EXT_XRGB during decompression, the X byte is undefined, and in
     order to ensure the best performance, libjpeg-turbo can set that byte to
     whatever value it wishes.  Use the following colorspace constants to
     ensure that the X byte is set to 0xFF, so that it can be interpreted as an
     opaque alpha channel. */
  JCS_EXT_RGBA,           /* red/green/blue/alpha */
  JCS_EXT_BGRA,           /* blue/green/red/alpha */
  JCS_EXT_ABGR,           /* alpha/blue/green/red */
  JCS_EXT_ARGB,           /* alpha/red/green/blue */
  JCS_RGB565              /* 5-bit red/6-bit green/5-bit blue */
} J_COLOR_SPACE;

/* DCT/IDCT algorithm options. */

typedef enum {
  JDCT_ISLOW,             /* slow but accurate integer algorithm */
  JDCT_IFAST,             /* faster, less accurate integer method */
  JDCT_FLOAT              /* floating-point: accurate, fast on fast HW */
} J_DCT_METHOD;

#ifndef JDCT_DEFAULT            /* may be overridden in jconfig.h */
#define JDCT_DEFAULT  JDCT_ISLOW
#endif
#ifndef JDCT_FASTEST            /* may be overridden in jconfig.h */
#define JDCT_FASTEST  JDCT_IFAST
#endif

/* Dithering options for decompression. */

typedef enum {
  JDITHER_NONE,           /* no dithering */
  JDITHER_ORDERED,        /* simple ordered dither */
  JDITHER_FS              /* Floyd-Steinberg error diffusion dither */
} J_DITHER_MODE;


/* Common fields between JPEG compression and decompression master structs. */

#define jpeg_common_fields \
  struct jpeg_error_mgr *err;   /* Error handler module */ \
  struct jpeg_memory_mgr *mem;  /* Memory manager module */ \
  struct jpeg_progress_mgr *progress; /* Progress monitor, or NULL if none */ \
  void *client_data;            /* Available for use by application */ \
  boolean is_decompressor;      /* So common code can tell which is which */ \
  int global_state              /* For checking call sequence validity */

/* Routines that are to be used by both halves of the library are declared
 * to receive a pointer to this structure.  There are no actual instances of
 * jpeg_common_struct, only of jpeg_compress_struct and jpeg_decompress_struct.
 */
struct jpeg_common_struct {
  jpeg_common_fields;           /* Fields common to both master struct types */
  /* Additional fields follow in an actual jpeg_compress_struct or
   * jpeg_decompress_struct.  All three structs must agree on these
   * initial fields!  (This would be a lot cleaner in C++.)
   */
};

typedef struct jpeg_common_struct *j_common_ptr;
typedef struct jpeg_compress_struct *j_compress_ptr;
typedef struct jpeg_decompress_struct *j_decompress_ptr;


/* Master record for a compression instance */

struct jpeg_compress_struct {
  jpeg_common_fields;           /* Fields shared with jpeg_decompress_struct */

  /* Destination for compressed data */
  struct jpeg_destination_mgr *dest;

  /* Description of source image --- these fields must be filled in by
   * outer application before starting compression.  in_color_space must
   * be correct before you can even call jpeg_set_defaults().
   */

  JDIMENSION image_width;       /* input image width */
  JDIMENSION image_height;      /* input image height */
  int input_components;         /* # of color components in input image */
  J_COLOR_SPACE in_color_space; /* colorspace of input image */

  double input_gamma;           /* image gamma of input image */

  /* Compression parameters --- these fields must be set before calling
   * jpeg_start_compress().  We recommend calling jpeg_set_defaults() to
   * initialize everything to reasonable defaults, then changing anything
   * the application specifically wants to change.  That way you won't get
   * burnt when new parameters are added.  Also note that there are several
   * helper routines to simplify changing parameters.
   */

#if JPEG_LIB_VERSION >= 70
  unsigned int scale_num, scale_denom; /* fraction by which to scale image */

  JDIMENSION jpeg_width;        /* scaled JPEG image width */
  JDIMENSION jpeg_height;       /* scaled JPEG image height */
  /* Dimensions of actual JPEG image that will be written to file,
   * derived from input dimensions by scaling factors above.
   * These fields are computed by jpeg_start_compress().
   * You can also use jpeg_calc_jpeg_dimensions() to determine these values
   * in advance of calling jpeg_start_compress().
   */
#endif

  int data_precision;           /* bits of precision in image data */

  int num_components;           /* # of color components in JPEG image */
  J_COLOR_SPACE jpeg_color_space; /* colorspace of JPEG image */

  jpeg_component_info *comp_info;
  /* comp_info[i] describes component that appears i'th in SOF */

  JQUANT_TBL *quant_tbl_ptrs[NUM_QUANT_TBLS];
#if JPEG_LIB_VERSION >= 70
  int q_scale_factor[NUM_QUANT_TBLS];
#endif
  /* ptrs to coefficient quantization tables, or NULL if not defined,
   * and corresponding scale factors (percentage, initialized 100).
   */

  JHUFF_TBL *dc_huff_tbl_ptrs[NUM_HUFF_TBLS];
  JHUFF_TBL *ac_huff_tbl_ptrs[NUM_HUFF_TBLS];
  /* ptrs to Huffman coding tables, or NULL if not defined */

  UINT8 arith_dc_L[NUM_ARITH_TBLS]; /* L values for DC arith-coding tables */
  UINT8 arith_dc_U[NUM_ARITH_TBLS]; /* U values for DC arith-coding tables */
  UINT8 arith_ac_K[NUM_ARITH_TBLS]; /* Kx values for AC arith-coding tables */

  int num_scans;                /* # of entries in scan_info array */
  const jpeg_scan_info *scan_info; /* script for multi-scan file, or NULL */
  /* The default value of scan_info is NULL, which causes a single-scan
   * sequential JPEG file to be emitted.  To create a multi-scan file,
   * set num_scans and scan_info to point to an array of scan definitions.
   */

  boolean raw_data_in;          /* TRUE=caller supplies downsampled data */
  boolean arith_code;           /* TRUE=arithmetic coding, FALSE=Huffman */
  boolean optimize_coding;      /* TRUE=optimize entropy encoding parms */
  boolean CCIR601_sampling;     /* TRUE=first samples are cosited */
#if JPEG_LIB_VERSION >= 70
  boolean do_fancy_downsampling; /* TRUE=apply fancy downsampling */
#endif
  int smoothing_factor;         /* 1..100, or 0 for no input smoothing */
  J_DCT_METHOD dct_method;      /* DCT algorithm selector */

  /* The restart interval can be specified in absolute MCUs by setting
   * restart_interval, or in MCU rows by setting restart_in_rows
   * (in which case the correct restart_interval will be figured
   * for each scan).
   */
  unsigned int restart_interval; /* MCUs per restart, or 0 for no restart */
  int restart_in_rows;          /* if > 0, MCU rows per restart interval */

  /* Parameters controlling emission of special markers. */

  boolean write_JFIF_header;    /* should a JFIF marker be written? */
  UINT8 JFIF_major_version;     /* What to write for the JFIF version number */
  UINT8 JFIF_minor_version;
  /* These three values are not used by the JPEG code, merely copied */
  /* into the JFIF APP0 marker.  density_unit can be 0 for unknown, */
  /* 1 for dots/inch, or 2 for dots/cm.  Note that the pixel aspect */
  /* ratio is defined by X_density/Y_density even when density_unit=0. */
  UINT8 density_unit;           /* JFIF code for pixel size units */
  UINT16 X_density;             /* Horizontal pixel density */
  UINT16 Y_density;             /* Vertical pixel density */
  boolean write_Adobe_marker;   /* should an Adobe marker be written? */

  /* State variable: index of next scanline to be written to
   * jpeg_write_scanlines().  Application may use this to control its
   * processing loop, e.g., "while (next_scanline < image_height)".
   */

  JDIMENSION next_scanline;     /* 0 .. image_height-1  */

  /* Remaining fields are known throughout compressor, but generally
   * should not be touched by a surrounding application.
   */

  /*
   * These fields are computed during compression startup
   */
  boolean progressive_mode;     /* TRUE if scan script uses progressive mode */
  int max_h_samp_factor;        /* largest h_samp_factor */
  int max_v_samp_factor;        /* largest v_samp_factor */

#if JPEG_LIB_VERSION >= 70
  int min_DCT_h_scaled_size;    /* smallest DCT_h_scaled_size of any component */
  int min_DCT_v_scaled_size;    /* smallest DCT_v_scaled_size of any component */
#endif

  JDIMENSION total_iMCU_rows;   /* # of iMCU rows to be input to coef ctlr */
  /* The coefficient controller receives data in units of MCU rows as defined
   * for fully interleaved scans (whether the JPEG file is interleaved or not).
   * There are v_samp_factor * DCTSIZE sample rows of each component in an
   * "iMCU" (interleaved MCU) row.
   */

  /*
   * These fields are valid during any one scan.
   * They describe the components and MCUs actually appearing in the scan.
   */
  int comps_in_scan;            /* # of JPEG components in this scan */
  jpeg_component_info *cur_comp_info[MAX_COMPS_IN_SCAN];
  /* *cur_comp_info[i] describes component that appears i'th in SOS */

  JDIMENSION MCUs_per_row;      /* # of MCUs across the image */
  JDIMENSION MCU_rows_in_scan;  /* # of MCU rows in the image */

  int blocks_in_MCU;            /* # of DCT blocks per MCU */
  int MCU_membership[C_MAX_BLOCKS_IN_MCU];
  /* MCU_membership[i] is index in cur_comp_info of component owning */
  /* i'th block in an MCU */

  int Ss, Se, Ah, Al;           /* progressive JPEG parameters for scan */

#if JPEG_LIB_VERSION >= 80
  int block_size;               /* the basic DCT block size: 1..16 */
  const int *natural_order;     /* natural-order position array */
  int lim_Se;                   /* min( Se, DCTSIZE2-1 ) */
#endif

  /*
   * Links to compression subobjects (methods and private variables of modules)
   */
  struct jpeg_comp_master *master;
  struct jpeg_c_main_controller *main;
  struct jpeg_c_prep_controller *prep;
  struct jpeg_c_coef_controller *coef;
  struct jpeg_marker_writer *marker;
  struct jpeg_color_converter *cconvert;
  struct jpeg_downsampler *downsample;
  struct jpeg_forward_dct *fdct;
  struct jpeg_entropy_encoder *entropy;
  jpeg_scan_info *script_space; /* workspace for jpeg_simple_progression */
  int script_space_size;
};


/* Master record for a decompression instance */

struct jpeg_decompress_struct {
  jpeg_common_fields;           /* Fields shared with jpeg_compress_struct */

  /* Source of compressed data */
  struct jpeg_source_mgr *src;

  /* Basic description of image --- filled in by jpeg_read_header(). */
  /* Application may inspect these values to decide how to process image. */

  JDIMENSION image_width;       /* nominal image width (from SOF marker) */
  JDIMENSION image_height;      /* nominal image height */
  int num_components;           /* # of color components in JPEG image */
  J_COLOR_SPACE jpeg_color_space; /* colorspace of JPEG image */

  /* Decompression processing parameters --- these fields must be set before
   * calling jpeg_start_decompress().  Note that jpeg_read_header() initializes
   * them to default values.
   */

  J_COLOR_SPACE out_color_space; /* colorspace for output */

  unsigned int scale_num, scale_denom; /* fraction by which to scale image */

  double output_gamma;          /* image gamma wanted in output */

  boolean buffered_image;       /* TRUE=multiple output passes */
  boolean raw_data_out;         /* TRUE=downsampled data wanted */

  J_DCT_METHOD dct_method;      /* IDCT algorithm selector */
  boolean do_fancy_upsampling;  /* TRUE=apply fancy upsampling */
  boolean do_block_smoothing;   /* TRUE=apply interblock smoothing */

  boolean quantize_colors;      /* TRUE=colormapped output wanted */
  /* the following are ignored if not quantize_colors: */
  J_DITHER_MODE dither_mode;    /* type of color dithering to use */
  boolean two_pass_quantize;    /* TRUE=use two-pass color quantization */
  int desired_number_of_colors; /* max # colors to use in created colormap */
  /* these are significant only in buffered-image mode: */
  boolean enable_1pass_quant;   /* enable future use of 1-pass quantizer */
  boolean enable_external_quant;/* enable future use of external colormap */
  boolean enable_2pass_quant;   /* enable future use of 2-pass quantizer */

  /* Description of actual output image that will be returned to application.
   * These fields are computed by jpeg_start_decompress().
   * You can also use jpeg_calc_output_dimensions() to determine these values
   * in advance of calling jpeg_start_decompress().
   */

  JDIMENSION output_width;      /* scaled image width */
  JDIMENSION output_height;     /* scaled image height */
  int out_color_components;     /* # of color components in out_color_space */
  int output_components;        /* # of color components returned */
  /* output_components is 1 (a colormap index) when quantizing colors;
   * otherwise it equals out_color_components.
   */
  int rec_outbuf_height;        /* min recommended height of scanline buffer */
  /* If the buffer passed to jpeg_read_scanlines() is less than this many rows
   * high, space and time will be wasted due to unnecessary data copying.
   * Usually rec_outbuf_height will be 1 or 2, at most 4.
   */

  /* When quantizing colors, the output colormap is described by these fields.
   * The application can supply a colormap by setting colormap non-NULL before
   * calling jpeg_start_decompress; otherwise a colormap is created during
   * jpeg_start_decompress or jpeg_start_output.
   * The map has out_color_components rows and actual_number_of_colors columns.
   */
  int actual_number_of_colors;  /* number of entries in use */
  JSAMPARRAY colormap;          /* The color map as a 2-D pixel array */

  /* State variables: these variables indicate the progress of decompression.
   * The application may examine these but must not modify them.
   */

  /* Row index of next scanline to be read from jpeg_read_scanlines().
   * Application may use this to control its processing loop, e.g.,
   * "while (output_scanline < output_height)".
   */
  JDIMENSION output_scanline;   /* 0 .. output_height-1  */

  /* Current input scan number and number of iMCU rows completed in scan.
   * These indicate the progress of the decompressor input side.
   */
  int input_scan_number;        /* Number of SOS markers seen so far */
  JDIMENSION input_iMCU_row;    /* Number of iMCU rows completed */

  /* The "output scan number" is the notional scan being displayed by the
   * output side.  The decompressor will not allow output scan/row number
   * to get ahead of input scan/row, but it can fall arbitrarily far behind.
   */
  int output_scan_number;       /* Nominal scan number being displayed */
  JDIMENSION output_iMCU_row;   /* Number of iMCU rows read */

  /* Current progression status.  coef_bits[c][i] indicates the precision
   * with which component c's DCT coefficient i (in zigzag order) is known.
   * It is -1 when no data has yet been received, otherwise it is the point
   * transform (shift) value for the most recent scan of the coefficient
   * (thus, 0 at completion of the progression).
   * This pointer is NULL when reading a non-progressive file.
   */
  int (*coef_bits)[DCTSIZE2];   /* -1 or current Al value for each coef */

  /* Internal JPEG parameters --- the application usually need not look at
   * these fields.  Note that the decompressor output side may not use
   * any parameters that can change between scans.
   */

  /* Quantization and Huffman tables are carried forward across input
   * datastreams when processing abbreviated JPEG datastreams.
   */

  JQUANT_TBL *quant_tbl_ptrs[NUM_QUANT_TBLS];
  /* ptrs to coefficient quantization tables, or NULL if not defined */

  JHUFF_TBL *dc_huff_tbl_ptrs[NUM_HUFF_TBLS];
  JHUFF_TBL *ac_huff_tbl_ptrs[NUM_HUFF_TBLS];
  /* ptrs to Huffman coding tables, or NULL if not defined */

  /* These parameters are never carried across datastreams, since they
   * are given in SOF/SOS markers or defined to be reset by SOI.
   */

  int data_precision;           /* bits of precision in image data */

  jpeg_component_info *comp_info;
  /* comp_info[i] describes component that appears i'th in SOF */

#if JPEG_LIB_VERSION >= 80
  boolean is_baseline;          /* TRUE if Baseline SOF0 encountered */
#endif
  boolean progressive_mode;     /* TRUE if SOFn specifies progressive mode */
  boolean arith_code;           /* TRUE=arithmetic coding, FALSE=Huffman */

  UINT8 arith_dc_L[NUM_ARITH_TBLS]; /* L values for DC arith-coding tables */
  UINT8 arith_dc_U[NUM_ARITH_TBLS]; /* U values for DC arith-coding tables */
  UINT8 arith_ac_K[NUM_ARITH_TBLS]; /* Kx values for AC arith-coding tables */

  unsigned int restart_interval; /* MCUs per restart interval, or 0 for no restart */

  /* These fields record data obtained from optional markers recognized by
   * the JPEG library.
   */
  boolean saw_JFIF_marker;      /* TRUE iff a JFIF APP0 marker was found */
  /* Data copied from JFIF marker; only valid if saw_JFIF_marker is TRUE: */
  UINT8 JFIF_major_version;     /* JFIF version number */
  UINT8 JFIF_minor_version;
  UINT8 density_unit;           /* JFIF code for pixel size units */
  UINT16 X_density;             /* Horizontal pixel density */
  UINT16 Y_density;             /* Vertical pixel density */
  boolean saw_Adobe_marker;     /* TRUE iff an Adobe APP14 marker was found */
  UINT8 Adobe_transform;        /* Color transform code from Adobe marker */

  boolean CCIR601_sampling;     /* TRUE=first samples are cosited */

  /* Aside from the specific data retained from APPn markers known to the
   * library, the uninterpreted contents of any or all APPn and COM markers
   * can be saved in a list for examination by the application.
   */
  jpeg_saved_marker_ptr marker_list; /* Head of list of saved markers */

  /* Remaining fields are known throughout decompressor, but generally
   * should not be touched by a surrounding application.
   */

  /*
   * These fields are computed during decompression startup
   */
  int max_h_samp_factor;        /* largest h_samp_factor */
  int max_v_samp_factor;        /* largest v_samp_factor */

#if JPEG_LIB_VERSION >= 70
  int min_DCT_h_scaled_size;    /* smallest DCT_h_scaled_size of any component */
  int min_DCT_v_scaled_size;    /* smallest DCT_v_scaled_size of any component */
#else
  int min_DCT_scaled_size;      /* smallest DCT_scaled_size of any component */
#endif

  JDIMENSION total_iMCU_rows;   /* # of iMCU rows in image */
  /* The coefficient controller's input and output progress is measured in
   * units of "iMCU" (interleaved MCU) rows.  These are the same as MCU rows
   * in fully interleaved JPEG scans, but are used whether the scan is
   * interleaved or not.  We define an iMCU row as v_samp_factor DCT block
   * rows of each component.  Therefore, the IDCT output contains
   * v_samp_factor*DCT_[v_]scaled_size sample rows of a component per iMCU row.
   */

  JSAMPLE *sample_range_limit;  /* table for fast range-limiting */

  /*
   * These fields are valid during any one scan.
   * They describe the components and MCUs actually appearing in the scan.
   * Note that the decompressor output side must not use these fields.
   */
  int comps_in_scan;            /* # of JPEG components in this scan */
  jpeg_component_info *cur_comp_info[MAX_COMPS_IN_SCAN];
  /* *cur_comp_info[i] describes component that appears i'th in SOS */

  JDIMENSION MCUs_per_row;      /* # of MCUs across the image */
  JDIMENSION MCU_rows_in_scan;  /* # of MCU rows in the image */

  int blocks_in_MCU;            /* # of DCT blocks per MCU */
  int MCU_membership[D_MAX_BLOCKS_IN_MCU];
  /* MCU_membership[i] is index in cur_comp_info of component owning */
  /* i'th block in an MCU */

  int Ss, Se, Ah, Al;           /* progressive JPEG parameters for scan */

#if JPEG_LIB_VERSION >= 80
  /* These fields are derived from Se of first SOS marker.
   */
  int block_size;               /* the basic DCT block size: 1..16 */
  const int *natural_order; /* natural-order position array for entropy decode */
  int lim_Se;                   /* min( Se, DCTSIZE2-1 ) for entropy decode */
#endif

  /* This field is shared between entropy decoder and marker parser.
   * It is either zero or the code of a JPEG marker that has been
   * read from the data source, but has not yet been processed.
   */
  int unread_marker;

  /*
   * Links to decompression subobjects (methods, private variables of modules)
   */
  struct jpeg_decomp_master *master;
  struct jpeg_d_main_controller *main;
  struct jpeg_d_coef_controller *coef;
  struct jpeg_d_post_controller *post;
  struct jpeg_input_controller *inputctl;
  struct jpeg_marker_reader *marker;
  struct jpeg_entropy_decoder *entropy;
  struct jpeg_inverse_dct *idct;
  struct jpeg_upsampler *upsample;
  struct jpeg_color_deconverter *cconvert;
  struct jpeg_color_quantizer *cquantize;
};


/* "Object" declarations for JPEG modules that may be supplied or called
 * directly by the surrounding application.
 * As with all objects in the JPEG library, these structs only define the
 * publicly visible methods and state variables of a module.  Additional
 * private fields may exist after the public ones.
 */


/* Error handler object */

struct jpeg_error_mgr {
  /* Error exit handler: does not return to caller */
  void (*error_exit) (j_common_ptr cinfo);
  /* Conditionally emit a trace or warning message */
  void (*emit_message) (j_common_ptr cinfo, int msg_level);
  /* Routine that actually outputs a trace or error message */
  void (*output_message) (j_common_ptr cinfo);
  /* Format a message string for the most recent JPEG error or message */
  void (*format_message) (j_common_ptr cinfo, char *buffer);
#define JMSG_LENGTH_MAX  200    /* recommended size of format_message buffer */
  /* Reset error state variables at start of a new image */
  void (*reset_error_mgr) (j_common_ptr cinfo);

  /* The message ID code and any parameters are saved here.
   * A message can have one string parameter or up to 8 int parameters.
   */
  int msg_code;
#define JMSG_STR_PARM_MAX  80
  union {
    int i[8];
    char s[JMSG_STR_PARM_MAX];
  } msg_parm;

  /* Standard state variables for error facility */

  int trace_level;              /* max msg_level that will be displayed */

  /* For recoverable corrupt-data errors, we emit a warning message,
   * but keep going unless emit_message chooses to abort.  emit_message
   * should count warnings in num_warnings.  The surrounding application
   * can check for bad data by seeing if num_warnings is nonzero at the
   * end of processing.
   */
  long num_warnings;            /* number of corrupt-data warnings */

  /* These fields point to the table(s) of error message strings.
   * An application can change the table pointer to switch to a different
   * message list (typically, to change the language in which errors are
   * reported).  Some applications may wish to add additional error codes
   * that will be handled by the JPEG library error mechanism; the second
   * table pointer is used for this purpose.
   *
   * First table includes all errors generated by JPEG library itself.
   * Error code 0 is reserved for a "no such error string" message.
   */
  const char * const *jpeg_message_table; /* Library errors */
  int last_jpeg_message;    /* Table contains strings 0..last_jpeg_message */
  /* Second table can be added by application (see cjpeg/djpeg for example).
   * It contains strings numbered first_addon_message..last_addon_message.
   */
  const char * const *addon_message_table; /* Non-library errors */
  int first_addon_message;      /* code for first string in addon table */
  int last_addon_message;       /* code for last string in addon table */
};


/* Progress monitor object */

struct jpeg_progress_mgr {
  void (*progress_monitor) (j_common_ptr cinfo);

  long pass_counter;            /* work units completed in this pass */
  long pass_limit;              /* total number of work units in this pass */
  int completed_passes;         /* passes completed so far */
  int total_passes;             /* total number of passes expected */
};


/* Data destination object for compression */

struct jpeg_destination_mgr {
  JOCTET *next_output_byte;     /* => next byte to write in buffer */
  size_t free_in_buffer;        /* # of byte spaces remaining in buffer */

  void (*init_destination) (j_compress_ptr cinfo);
  boolean (*empty_output_buffer) (j_compress_ptr cinfo);
  void (*term_destination) (j_compress_ptr cinfo);
};


/* Data source object for decompression */

struct jpeg_source_mgr {
  const JOCTET *next_input_byte; /* => next byte to read from buffer */
  size_t bytes_in_buffer;       /* # of bytes remaining in buffer */

  void (*init_source) (j_decompress_ptr cinfo);
  boolean (*fill_input_buffer) (j_decompress_ptr cinfo);
  void (*skip_input_data) (j_decompress_ptr cinfo, long num_bytes);
  boolean (*resync_to_restart) (j_decompress_ptr cinfo, int desired);
  void (*term_source) (j_decompress_ptr cinfo);
};


/* Memory manager object.
 * Allocates "small" objects (a few K total), "large" objects (tens of K),
 * and "really big" objects (virtual arrays with backing store if needed).
 * The memory manager does not allow individual objects to be freed; rather,
 * each created object is assigned to a pool, and whole pools can be freed
 * at once.  This is faster and more convenient than remembering exactly what
 * to free, especially where malloc()/free() are not too speedy.
 * NB: alloc routines never return NULL.  They exit to error_exit if not
 * successful.
 */

#define JPOOL_PERMANENT  0      /* lasts until master record is destroyed */
#define JPOOL_IMAGE      1      /* lasts until done with image/datastream */
#define JPOOL_NUMPOOLS   2

typedef struct jvirt_sarray_control *jvirt_sarray_ptr;
typedef struct jvirt_barray_control *jvirt_barray_ptr;


struct jpeg_memory_mgr {
  /* Method pointers */
  void *(*alloc_small) (j_common_ptr cinfo, int pool_id, size_t sizeofobject);
  void *(*alloc_large) (j_common_ptr cinfo, int pool_id,
                        size_t sizeofobject);
  JSAMPARRAY (*alloc_sarray) (j_common_ptr cinfo, int pool_id,
                              JDIMENSION samplesperrow, JDIMENSION numrows);
  JBLOCKARRAY (*alloc_barray) (j_common_ptr cinfo, int pool_id,
                               JDIMENSION blocksperrow, JDIMENSION numrows);
  jvirt_sarray_ptr (*request_virt_sarray) (j_common_ptr cinfo, int pool_id,
                                           boolean pre_zero,
                                           JDIMENSION samplesperrow,
                                           JDIMENSION numrows,
                                           JDIMENSION maxaccess);
  jvirt_barray_ptr (*request_virt_barray) (j_common_ptr cinfo, int pool_id,
                                           boolean pre_zero,
                                           JDIMENSION blocksperrow,
                                           JDIMENSION numrows,
                                           JDIMENSION maxaccess);
  void (*realize_virt_arrays) (j_common_ptr cinfo);
  JSAMPARRAY (*access_virt_sarray) (j_common_ptr cinfo, jvirt_sarray_ptr ptr,
                                    JDIMENSION start_row, JDIMENSION num_rows,
                                    boolean writable);
  JBLOCKARRAY (*access_virt_barray) (j_common_ptr cinfo, jvirt_barray_ptr ptr,
                                     JDIMENSION start_row, JDIMENSION num_rows,
                                     boolean writable);
  void (*free_pool) (j_common_ptr cinfo, int pool_id);
  void (*self_destruct) (j_common_ptr cinfo);

  /* Limit on memory allocation for this JPEG object.  (Note that this is
   * merely advisory, not a guaranteed maximum; it only affects the space
   * used for virtual-array buffers.)  May be changed by outer application
   * after creating the JPEG object.
   */
  long max_memory_to_use;

  /* Maximum allocation request accepted by alloc_large. */
  long max_alloc_chunk;
};


/* Routine signature for application-supplied marker processing methods.
 * Need not pass marker code since it is stored in cinfo->unread_marker.
 */
typedef boolean (*jpeg_marker_parser_method) (j_decompress_ptr cinfo);


/* Originally, this macro was used as a way of defining function prototypes
 * for both modern compilers as well as older compilers that did not support
 * prototype parameters.  libjpeg-turbo has never supported these older,
 * non-ANSI compilers, but the macro is still included because there is some
 * software out there that uses it.
 */

#define JPP(arglist)    arglist


/* Default error-management setup */
EXTERN(struct jpeg_error_mgr *) jpeg_std_error(struct jpeg_error_mgr *err);

/* Initialization of JPEG compression objects.
 * jpeg_create_compress() and jpeg_create_decompress() are the exported
 * names that applications should call.  These expand to calls on
 * jpeg_CreateCompress and jpeg_CreateDecompress with additional information
 * passed for version mismatch checking.
 * NB: you must set up the error-manager BEFORE calling jpeg_create_xxx.
 */
#define jpeg_create_compress(cinfo) \
  jpeg_CreateCompress((cinfo), JPEG_LIB_VERSION, \
                      (size_t)sizeof(struct jpeg_compress_struct))
#define jpeg_create_decompress(cinfo) \
  jpeg_CreateDecompress((cinfo), JPEG_LIB_VERSION, \
                        (size_t)sizeof(struct jpeg_decompress_struct))
EXTERN(void) jpeg_CreateCompress(j_compress_ptr cinfo, int version,
                                 size_t structsize);
EXTERN(void) jpeg_CreateDecompress(j_decompress_ptr cinfo, int version,
                                   size_t structsize);
/* Destruction of JPEG compression objects */
EXTERN(void) jpeg_destroy_compress(j_compress_ptr cinfo);
EXTERN(void) jpeg_destroy_decompress(j_decompress_ptr cinfo);

/* Standard data source and destination managers: stdio streams. */
/* Caller is responsible for opening the file before and closing after. */
EXTERN(void) jpeg_stdio_dest(j_compress_ptr cinfo, FILE *outfile);
EXTERN(void) jpeg_stdio_src(j_decompress_ptr cinfo, FILE *infile);

#if JPEG_LIB_VERSION >= 80 || defined(MEM_SRCDST_SUPPORTED)
/* Data source and destination managers: memory buffers. */
EXTERN(void) jpeg_mem_dest(j_compress_ptr cinfo, unsigned char **outbuffer,
                           unsigned long *outsize);
EXTERN(void) jpeg_mem_src(j_decompress_ptr cinfo,
                          const unsigned char *inbuffer, unsigned long insize);
#endif

/* Default parameter setup for compression */
EXTERN(void) jpeg_set_defaults(j_compress_ptr cinfo);
/* Compression parameter setup aids */
EXTERN(void) jpeg_set_colorspace(j_compress_ptr cinfo,
                                 J_COLOR_SPACE colorspace);
EXTERN(void) jpeg_default_colorspace(j_compress_ptr cinfo);
EXTERN(void) jpeg_set_quality(j_compress_ptr cinfo, int quality,
                              boolean force_baseline);
EXTERN(void) jpeg_set_linear_quality(j_compress_ptr cinfo, int scale_factor,
                                     boolean force_baseline);
#if JPEG_LIB_VERSION >= 70
EXTERN(void) jpeg_default_qtables(j_compress_ptr cinfo,
                                  boolean force_baseline);
#endif
EXTERN(void) jpeg_add_quant_table(j_compress_ptr cinfo, int which_tbl,
                                  const unsigned int *basic_table,
                                  int scale_factor, boolean force_baseline);
EXTERN(int) jpeg_quality_scaling(int quality);
EXTERN(void) jpeg_simple_progression(j_compress_ptr cinfo);
EXTERN(void) jpeg_suppress_tables(j_compress_ptr cinfo, boolean suppress);
EXTERN(JQUANT_TBL *) jpeg_alloc_quant_table(j_common_ptr cinfo);
EXTERN(JHUFF_TBL *) jpeg_alloc_huff_table(j_common_ptr cinfo);

/* Main entry points for compression */
EXTERN(void) jpeg_start_compress(j_compress_ptr cinfo,
                                 boolean write_all_tables);
EXTERN(JDIMENSION) jpeg_write_scanlines(j_compress_ptr cinfo,
                                        JSAMPARRAY scanlines,
                                        JDIMENSION num_lines);
EXTERN(void) jpeg_finish_compress(j_compress_ptr cinfo);

#if JPEG_LIB_VERSION >= 70
/* Precalculate JPEG dimensions for current compression parameters. */
EXTERN(void) jpeg_calc_jpeg_dimensions(j_compress_ptr cinfo);
#endif

/* Replaces jpeg_write_scanlines when writing raw downsampled data. */
EXTERN(JDIMENSION) jpeg_write_raw_data(j_compress_ptr cinfo, JSAMPIMAGE data,
                                       JDIMENSION num_lines);

/* Write a special marker.  See libjpeg.txt concerning safe usage. */
EXTERN(void) jpeg_write_marker(j_compress_ptr cinfo, int marker,
                               const JOCTET *dataptr, unsigned int datalen);
/* Same, but piecemeal. */
EXTERN(void) jpeg_write_m_header(j_compress_ptr cinfo, int marker,
                                 unsigned int datalen);
EXTERN(void) jpeg_write_m_byte(j_compress_ptr cinfo, int val);

/* Alternate compression function: just write an abbreviated table file */
EXTERN(void) jpeg_write_tables(j_compress_ptr cinfo);

/* Write ICC profile.  See libjpeg.txt for usage information. */
EXTERN(void) jpeg_write_icc_profile(j_compress_ptr cinfo,
                                    const JOCTET *icc_data_ptr,
                                    unsigned int icc_data_len);


/* Decompression startup: read start of JPEG datastream to see what's there */
EXTERN(int) jpeg_read_header(j_decompress_ptr cinfo, boolean require_image);
/* Return value is one of: */
#define JPEG_SUSPENDED           0 /* Suspended due to lack of input data */
#define JPEG_HEADER_OK           1 /* Found valid image datastream */
#define JPEG_HEADER_TABLES_ONLY  2 /* Found valid table-specs-only datastream */
/* If you pass require_image = TRUE (normal case), you need not check for
 * a TABLES_ONLY return code; an abbreviated file will cause an error exit.
 * JPEG_SUSPENDED is only possible if you use a data source module that can
 * give a suspension return (the stdio source module doesn't).
 */

/* Main entry points for decompression */
EXTERN(boolean) jpeg_start_decompress(j_decompress_ptr cinfo);
EXTERN(JDIMENSION) jpeg_read_scanlines(j_decompress_ptr cinfo,
                                       JSAMPARRAY scanlines,
                                       JDIMENSION max_lines);
EXTERN(JDIMENSION) jpeg_skip_scanlines(j_decompress_ptr cinfo,
                                       JDIMENSION num_lines);
EXTERN(void) jpeg_crop_scanline(j_decompress_ptr cinfo, JDIMENSION *xoffset,
                                JDIMENSION *width);
EXTERN(boolean) jpeg_finish_decompress(j_decompress_ptr cinfo);

/* Replaces jpeg_read_scanlines when reading raw downsampled data. */
EXTERN(JDIMENSION) jpeg_read_raw_data(j_decompress_ptr cinfo, JSAMPIMAGE data,
                                      JDIMENSION max_lines);

/* Additional entry points for buffered-image mode. */
EXTERN(boolean) jpeg_has_multiple_scans(j_decompress_ptr cinfo);
EXTERN(boolean) jpeg_start_output(j_decompress_ptr cinfo, int scan_number);
EXTERN(boolean) jpeg_finish_output(j_decompress_ptr cinfo);
EXTERN(boolean) jpeg_input_complete(j_decompress_ptr cinfo);
EXTERN(void) jpeg_new_colormap(j_decompress_ptr cinfo);
EXTERN(int) jpeg_consume_input(j_decompress_ptr cinfo);
/* Return value is one of: */
/* #define JPEG_SUSPENDED       0    Suspended due to lack of input data */
#define JPEG_REACHED_SOS        1 /* Reached start of new scan */
#define JPEG_REACHED_EOI        2 /* Reached end of image */
#define JPEG_ROW_COMPLETED      3 /* Completed one iMCU row */
#define JPEG_SCAN_COMPLETED     4 /* Completed last iMCU row of a scan */

/* Precalculate output dimensions for current decompression parameters. */
#if JPEG_LIB_VERSION >= 80
EXTERN(void) jpeg_core_output_dimensions(j_decompress_ptr cinfo);
#endif
EXTERN(void) jpeg_calc_output_dimensions(j_decompress_ptr cinfo);

/* Control saving of COM and APPn markers into marker_list. */
EXTERN(void) jpeg_save_markers(j_decompress_ptr cinfo, int marker_code,
                               unsigned int length_limit);

/* Install a special processing method for COM or APPn markers. */
EXTERN(void) jpeg_set_marker_processor(j_decompress_ptr cinfo,
                                       int marker_code,
                                       jpeg_marker_parser_method routine);

/* Read or write raw DCT coefficients --- useful for lossless transcoding. */
EXTERN(jvirt_barray_ptr *) jpeg_read_coefficients(j_decompress_ptr cinfo);
EXTERN(void) jpeg_write_coefficients(j_compress_ptr cinfo,
                                     jvirt_barray_ptr *coef_arrays);
EXTERN(void) jpeg_copy_critical_parameters(j_decompress_ptr srcinfo,
                                           j_compress_ptr dstinfo);

/* If you choose to abort compression or decompression before completing
 * jpeg_finish_(de)compress, then you need to clean up to release memory,
 * temporary files, etc.  You can just call jpeg_destroy_(de)compress
 * if you're done with the JPEG object, but if you want to clean it up and
 * reuse it, call this:
 */
EXTERN(void) jpeg_abort_compress(j_compress_ptr cinfo);
EXTERN(void) jpeg_abort_decompress(j_decompress_ptr cinfo);

/* Generic versions of jpeg_abort and jpeg_destroy that work on either
 * flavor of JPEG object.  These may be more convenient in some places.
 */
EXTERN(void) jpeg_abort(j_common_ptr cinfo);
EXTERN(void) jpeg_destroy(j_common_ptr cinfo);

/* Default restart-marker-resync procedure for use by data source modules */
EXTERN(boolean) jpeg_resync_to_restart(j_decompress_ptr cinfo, int desired);

/* Read ICC profile.  See libjpeg.txt for usage information. */
EXTERN(boolean) jpeg_read_icc_profile(j_decompress_ptr cinfo,
                                      JOCTET **icc_data_ptr,
                                      unsigned int *icc_data_len);


/* These marker codes are exported since applications and data source modules
 * are likely to want to use them.
 */

#define JPEG_RST0       0xD0    /* RST0 marker code */
#define JPEG_EOI        0xD9    /* EOI marker code */
#define JPEG_APP0       0xE0    /* APP0 marker code */
#define JPEG_COM        0xFE    /* COM marker code */


/* If we have a brain-damaged compiler that emits warnings (or worse, errors)
 * for structure definitions that are never filled in, keep it quiet by
 * supplying dummy definitions for the various substructures.
 */

#ifdef INCOMPLETE_TYPES_BROKEN
#ifndef JPEG_INTERNALS          /* will be defined in jpegint.h */
struct jvirt_sarray_control { long dummy; };
struct jvirt_barray_control { long dummy; };
struct jpeg_comp_master { long dummy; };
struct jpeg_c_main_controller { long dummy; };
struct jpeg_c_prep_controller { long dummy; };
struct jpeg_c_coef_controller { long dummy; };
struct jpeg_marker_writer { long dummy; };
struct jpeg_color_converter { long dummy; };
struct jpeg_downsampler { long dummy; };
struct jpeg_forward_dct { long dummy; };
struct jpeg_entropy_encoder { long dummy; };
struct jpeg_decomp_master { long dummy; };
struct jpeg_d_main_controller { long dummy; };
struct jpeg_d_coef_controller { long dummy; };
struct jpeg_d_post_controller { long dummy; };
struct jpeg_input_controller { long dummy; };
struct jpeg_marker_reader { long dummy; };
struct jpeg_entropy_decoder { long dummy; };
struct jpeg_inverse_dct { long dummy; };
struct jpeg_upsampler { long dummy; };
struct jpeg_color_deconverter { long dummy; };
struct jpeg_color_quantizer { long dummy; };
#endif /* JPEG_INTERNALS */
#endif /* INCOMPLETE_TYPES_BROKEN */


/*
 * The JPEG library modules define JPEG_INTERNALS before including this file.
 * The internal structure declarations are read only when that is true.
 * Applications using the library should not include jpegint.h, but may wish
 * to include jerror.h.
 */

#ifdef JPEG_INTERNALS
/*
 * jpegint.h
 *
 * This file was part of the Independent JPEG Group's software:
 * Copyright (C) 1991-1997, Thomas G. Lane.
 * Modified 1997-2009 by Guido Vollbeding.
 * libjpeg-turbo Modifications:
 * Copyright (C) 2015-2016, D. R. Commander.
 * Copyright (C) 2015, Google, Inc.
 * For conditions of distribution and use, see the accompanying README.ijg
 * file.
 *
 * This file provides common declarations for the various JPEG modules.
 * These declarations are considered internal to the JPEG library; most
 * applications using the library shouldn't need to include this file.
 */


/* Declarations for both compression & decompression */

typedef enum {            /* Operating modes for buffer controllers */
  JBUF_PASS_THRU,         /* Plain stripwise operation */
  /* Remaining modes require a full-image buffer to have been created */
  JBUF_SAVE_SOURCE,       /* Run source subobject only, save output */
  JBUF_CRANK_DEST,        /* Run dest subobject only, using saved data */
  JBUF_SAVE_AND_PASS      /* Run both subobjects, save output */
} J_BUF_MODE;

/* Values of global_state field (jdapi.c has some dependencies on ordering!) */
#define CSTATE_START     100    /* after create_compress */
#define CSTATE_SCANNING  101    /* start_compress done, write_scanlines OK */
#define CSTATE_RAW_OK    102    /* start_compress done, write_raw_data OK */
#define CSTATE_WRCOEFS   103    /* jpeg_write_coefficients done */
#define DSTATE_START     200    /* after create_decompress */
#define DSTATE_INHEADER  201    /* reading header markers, no SOS yet */
#define DSTATE_READY     202    /* found SOS, ready for start_decompress */
#define DSTATE_PRELOAD   203    /* reading multiscan file in start_decompress*/
#define DSTATE_PRESCAN   204    /* performing dummy pass for 2-pass quant */
#define DSTATE_SCANNING  205    /* start_decompress done, read_scanlines OK */
#define DSTATE_RAW_OK    206    /* start_decompress done, read_raw_data OK */
#define DSTATE_BUFIMAGE  207    /* expecting jpeg_start_output */
#define DSTATE_BUFPOST   208    /* looking for SOS/EOI in jpeg_finish_output */
#define DSTATE_RDCOEFS   209    /* reading file in jpeg_read_coefficients */
#define DSTATE_STOPPING  210    /* looking for EOI in jpeg_finish_decompress */


/* JLONG must hold at least signed 32-bit values. */
typedef long JLONG;


/*
 * Left shift macro that handles a negative operand without causing any
 * sanitizer warnings
 */

#define LEFT_SHIFT(a, b)  ((JLONG)((unsigned long)(a) << (b)))


/* Declarations for compression modules */

/* Master control module */
struct jpeg_comp_master {
  void (*prepare_for_pass) (j_compress_ptr cinfo);
  void (*pass_startup) (j_compress_ptr cinfo);
  void (*finish_pass) (j_compress_ptr cinfo);

  /* State variables made visible to other modules */
  boolean call_pass_startup;    /* True if pass_startup must be called */
  boolean is_last_pass;         /* True during last pass */
};

/* Main buffer control (downsampled-data buffer) */
struct jpeg_c_main_controller {
  void (*start_pass) (j_compress_ptr cinfo, J_BUF_MODE pass_mode);
  void (*process_data) (j_compress_ptr cinfo, JSAMPARRAY input_buf,
                        JDIMENSION *in_row_ctr, JDIMENSION in_rows_avail);
};

/* Compression preprocessing (downsampling input buffer control) */
struct jpeg_c_prep_controller {
  void (*start_pass) (j_compress_ptr cinfo, J_BUF_MODE pass_mode);
  void (*pre_process_data) (j_compress_ptr cinfo, JSAMPARRAY input_buf,
                            JDIMENSION *in_row_ctr, JDIMENSION in_rows_avail,
                            JSAMPIMAGE output_buf,
                            JDIMENSION *out_row_group_ctr,
                            JDIMENSION out_row_groups_avail);
};

/* Coefficient buffer control */
struct jpeg_c_coef_controller {
  void (*start_pass) (j_compress_ptr cinfo, J_BUF_MODE pass_mode);
  boolean (*compress_data) (j_compress_ptr cinfo, JSAMPIMAGE input_buf);
};

/* Colorspace conversion */
struct jpeg_color_converter {
  void (*start_pass) (j_compress_ptr cinfo);
  void (*color_convert) (j_compress_ptr cinfo, JSAMPARRAY input_buf,
                         JSAMPIMAGE output_buf, JDIMENSION output_row,
                         int num_rows);
};

/* Downsampling */
struct jpeg_downsampler {
  void (*start_pass) (j_compress_ptr cinfo);
  void (*downsample) (j_compress_ptr cinfo, JSAMPIMAGE input_buf,
                      JDIMENSION in_row_index, JSAMPIMAGE output_buf,
                      JDIMENSION out_row_group_index);

  boolean need_context_rows;    /* TRUE if need rows above & below */
};

/* Forward DCT (also controls coefficient quantization) */
struct jpeg_forward_dct {
  void (*start_pass) (j_compress_ptr cinfo);
  /* perhaps this should be an array??? */
  void (*forward_DCT) (j_compress_ptr cinfo, jpeg_component_info *compptr,
                       JSAMPARRAY sample_data, JBLOCKROW coef_blocks,
                       JDIMENSION start_row, JDIMENSION start_col,
                       JDIMENSION num_blocks);
};

/* Entropy encoding */
struct jpeg_entropy_encoder {
  void (*start_pass) (j_compress_ptr cinfo, boolean gather_statistics);
  boolean (*encode_mcu) (j_compress_ptr cinfo, JBLOCKROW *MCU_data);
  void (*finish_pass) (j_compress_ptr cinfo);
};

/* Marker writing */
struct jpeg_marker_writer {
  void (*write_file_header) (j_compress_ptr cinfo);
  void (*write_frame_header) (j_compress_ptr cinfo);
  void (*write_scan_header) (j_compress_ptr cinfo);
  void (*write_file_trailer) (j_compress_ptr cinfo);
  void (*write_tables_only) (j_compress_ptr cinfo);
  /* These routines are exported to allow insertion of extra markers */
  /* Probably only COM and APPn markers should be written this way */
  void (*write_marker_header) (j_compress_ptr cinfo, int marker,
                               unsigned int datalen);
  void (*write_marker_byte) (j_compress_ptr cinfo, int val);
};


/* Declarations for decompression modules */

/* Master control module */
struct jpeg_decomp_master {
  void (*prepare_for_output_pass) (j_decompress_ptr cinfo);
  void (*finish_output_pass) (j_decompress_ptr cinfo);

  /* State variables made visible to other modules */
  boolean is_dummy_pass;        /* True during 1st pass for 2-pass quant */

  /* Partial decompression variables */
  JDIMENSION first_iMCU_col;
  JDIMENSION last_iMCU_col;
  JDIMENSION first_MCU_col[MAX_COMPONENTS];
  JDIMENSION last_MCU_col[MAX_COMPONENTS];
  boolean jinit_upsampler_no_alloc;
};

/* Input control module */
struct jpeg_input_controller {
  int (*consume_input) (j_decompress_ptr cinfo);
  void (*reset_input_controller) (j_decompress_ptr cinfo);
  void (*start_input_pass) (j_decompress_ptr cinfo);
  void (*finish_input_pass) (j_decompress_ptr cinfo);

  /* State variables made visible to other modules */
  boolean has_multiple_scans;   /* True if file has multiple scans */
  boolean eoi_reached;          /* True when EOI has been consumed */
};

/* Main buffer control (downsampled-data buffer) */
struct jpeg_d_main_controller {
  void (*start_pass) (j_decompress_ptr cinfo, J_BUF_MODE pass_mode);
  void (*process_data) (j_decompress_ptr cinfo, JSAMPARRAY output_buf,
                        JDIMENSION *out_row_ctr, JDIMENSION out_rows_avail);
};

/* Coefficient buffer control */
struct jpeg_d_coef_controller {
  void (*start_input_pass) (j_decompress_ptr cinfo);
  int (*consume_data) (j_decompress_ptr cinfo);
  void (*start_output_pass) (j_decompress_ptr cinfo);
  int (*decompress_data) (j_decompress_ptr cinfo, JSAMPIMAGE output_buf);
  /* Pointer to array of coefficient virtual arrays, or NULL if none */
  jvirt_barray_ptr *coef_arrays;
};

/* Decompression postprocessing (color quantization buffer control) */
struct jpeg_d_post_controller {
  void (*start_pass) (j_decompress_ptr cinfo, J_BUF_MODE pass_mode);
  void (*post_process_data) (j_decompress_ptr cinfo, JSAMPIMAGE input_buf,
                             JDIMENSION *in_row_group_ctr,
                             JDIMENSION in_row_groups_avail,
                             JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
                             JDIMENSION out_rows_avail);
};

/* Marker reading & parsing */
struct jpeg_marker_reader {
  void (*reset_marker_reader) (j_decompress_ptr cinfo);
  /* Read markers until SOS or EOI.
   * Returns same codes as are defined for jpeg_consume_input:
   * JPEG_SUSPENDED, JPEG_REACHED_SOS, or JPEG_REACHED_EOI.
   */
  int (*read_markers) (j_decompress_ptr cinfo);
  /* Read a restart marker --- exported for use by entropy decoder only */
  jpeg_marker_parser_method read_restart_marker;

  /* State of marker reader --- nominally internal, but applications
   * supplying COM or APPn handlers might like to know the state.
   */
  boolean saw_SOI;              /* found SOI? */
  boolean saw_SOF;              /* found SOF? */
  int next_restart_num;         /* next restart number expected (0-7) */
  unsigned int discarded_bytes; /* # of bytes skipped looking for a marker */
};

/* Entropy decoding */
struct jpeg_entropy_decoder {
  void (*start_pass) (j_decompress_ptr cinfo);
  boolean (*decode_mcu) (j_decompress_ptr cinfo, JBLOCKROW *MCU_data);

  /* This is here to share code between baseline and progressive decoders; */
  /* other modules probably should not use it */
  boolean insufficient_data;    /* set TRUE after emitting warning */
};

/* Inverse DCT (also performs dequantization) */
typedef void (*inverse_DCT_method_ptr) (j_decompress_ptr cinfo,
                                        jpeg_component_info *compptr,
                                        JCOEFPTR coef_block,
                                        JSAMPARRAY output_buf,
                                        JDIMENSION output_col);

struct jpeg_inverse_dct {
  void (*start_pass) (j_decompress_ptr cinfo);
  /* It is useful to allow each component to have a separate IDCT method. */
  inverse_DCT_method_ptr inverse_DCT[MAX_COMPONENTS];
};

/* Upsampling (note that upsampler must also call color converter) */
struct jpeg_upsampler {
  void (*start_pass) (j_decompress_ptr cinfo);
  void (*upsample) (j_decompress_ptr cinfo, JSAMPIMAGE input_buf,
                    JDIMENSION *in_row_group_ctr,
                    JDIMENSION in_row_groups_avail, JSAMPARRAY output_buf,
                    JDIMENSION *out_row_ctr, JDIMENSION out_rows_avail);

  boolean need_context_rows;    /* TRUE if need rows above & below */
};

/* Colorspace conversion */
struct jpeg_color_deconverter {
  void (*start_pass) (j_decompress_ptr cinfo);
  void (*color_convert) (j_decompress_ptr cinfo, JSAMPIMAGE input_buf,
                         JDIMENSION input_row, JSAMPARRAY output_buf,
                         int num_rows);
};

/* Color quantization or color precision reduction */
struct jpeg_color_quantizer {
  void (*start_pass) (j_decompress_ptr cinfo, boolean is_pre_scan);
  void (*color_quantize) (j_decompress_ptr cinfo, JSAMPARRAY input_buf,
                          JSAMPARRAY output_buf, int num_rows);
  void (*finish_pass) (j_decompress_ptr cinfo);
  void (*new_color_map) (j_decompress_ptr cinfo);
};


/* Miscellaneous useful macros */

#undef MAX
#define MAX(a, b)       ((a) > (b) ? (a) : (b))
#undef MIN
#define MIN(a, b)       ((a) < (b) ? (a) : (b))


/* We assume that right shift corresponds to signed division by 2 with
 * rounding towards minus infinity.  This is correct for typical "arithmetic
 * shift" instructions that shift in copies of the sign bit.  But some
 * C compilers implement >> with an unsigned shift.  For these machines you
 * must define RIGHT_SHIFT_IS_UNSIGNED.
 * RIGHT_SHIFT provides a proper signed right shift of a JLONG quantity.
 * It is only applied with constant shift counts.  SHIFT_TEMPS must be
 * included in the variables of any routine using RIGHT_SHIFT.
 */

#ifdef RIGHT_SHIFT_IS_UNSIGNED
#define SHIFT_TEMPS     JLONG shift_temp;
#define RIGHT_SHIFT(x, shft) \
  ((shift_temp = (x)) < 0 ? \
   (shift_temp >> (shft)) | ((~((JLONG)0)) << (32 - (shft))) : \
   (shift_temp >> (shft)))
#else
#define SHIFT_TEMPS
#define RIGHT_SHIFT(x, shft)    ((x) >> (shft))
#endif


/* Compression module initialization routines */
EXTERN(void) jinit_compress_master(j_compress_ptr cinfo);
EXTERN(void) jinit_c_master_control(j_compress_ptr cinfo,
                                    boolean transcode_only);
EXTERN(void) jinit_c_main_controller(j_compress_ptr cinfo,
                                     boolean need_full_buffer);
EXTERN(void) jinit_c_prep_controller(j_compress_ptr cinfo,
                                     boolean need_full_buffer);
EXTERN(void) jinit_c_coef_controller(j_compress_ptr cinfo,
                                     boolean need_full_buffer);
EXTERN(void) jinit_color_converter(j_compress_ptr cinfo);
EXTERN(void) jinit_downsampler(j_compress_ptr cinfo);
EXTERN(void) jinit_forward_dct(j_compress_ptr cinfo);
EXTERN(void) jinit_huff_encoder(j_compress_ptr cinfo);
EXTERN(void) jinit_phuff_encoder(j_compress_ptr cinfo);
EXTERN(void) jinit_arith_encoder(j_compress_ptr cinfo);
EXTERN(void) jinit_marker_writer(j_compress_ptr cinfo);
/* Decompression module initialization routines */
EXTERN(void) jinit_master_decompress(j_decompress_ptr cinfo);
EXTERN(void) jinit_d_main_controller(j_decompress_ptr cinfo,
                                     boolean need_full_buffer);
EXTERN(void) jinit_d_coef_controller(j_decompress_ptr cinfo,
                                     boolean need_full_buffer);
EXTERN(void) jinit_d_post_controller(j_decompress_ptr cinfo,
                                     boolean need_full_buffer);
EXTERN(void) jinit_input_controller(j_decompress_ptr cinfo);
EXTERN(void) jinit_marker_reader(j_decompress_ptr cinfo);
EXTERN(void) jinit_huff_decoder(j_decompress_ptr cinfo);
EXTERN(void) jinit_phuff_decoder(j_decompress_ptr cinfo);
EXTERN(void) jinit_arith_decoder(j_decompress_ptr cinfo);
EXTERN(void) jinit_inverse_dct(j_decompress_ptr cinfo);
EXTERN(void) jinit_upsampler(j_decompress_ptr cinfo);
EXTERN(void) jinit_color_deconverter(j_decompress_ptr cinfo);
EXTERN(void) jinit_1pass_quantizer(j_decompress_ptr cinfo);
EXTERN(void) jinit_2pass_quantizer(j_decompress_ptr cinfo);
EXTERN(void) jinit_merged_upsampler(j_decompress_ptr cinfo);
/* Memory manager initialization */
EXTERN(void) jinit_memory_mgr(j_common_ptr cinfo);

/* Utility routines in jutils.c */
EXTERN(long) jdiv_round_up(long a, long b);
EXTERN(long) jround_up(long a, long b);
EXTERN(void) jcopy_sample_rows(JSAMPARRAY input_array, int source_row,
                               JSAMPARRAY output_array, int dest_row,
                               int num_rows, JDIMENSION num_cols);
EXTERN(void) jcopy_block_row(JBLOCKROW input_row, JBLOCKROW output_row,
                             JDIMENSION num_blocks);
EXTERN(void) jzero_far(void *target, size_t bytestozero);
/* Constant tables in jutils.c */
#if 0                           /* This table is not actually needed in v6a */
extern const int jpeg_zigzag_order[]; /* natural coef order to zigzag order */
#endif
extern const int jpeg_natural_order[]; /* zigzag coef order to natural order */

/* Arithmetic coding probability estimation tables in jaricom.c */
extern const JLONG jpeg_aritab[];

/* Suppress undefined-structure complaints if necessary. */

#ifdef INCOMPLETE_TYPES_BROKEN
#ifndef AM_MEMORY_MANAGER       /* only jmemmgr.c defines these */
struct jvirt_sarray_control { long dummy; };
struct jvirt_barray_control { long dummy; };
#endif
#endif /* INCOMPLETE_TYPES_BROKEN */
/*
 * jerror.h
 *
 * This file was part of the Independent JPEG Group's software:
 * Copyright (C) 1994-1997, Thomas G. Lane.
 * Modified 1997-2009 by Guido Vollbeding.
 * libjpeg-turbo Modifications:
 * Copyright (C) 2014, 2017, D. R. Commander.
 * For conditions of distribution and use, see the accompanying README.ijg
 * file.
 *
 * This file defines the error and message codes for the JPEG library.
 * Edit this file to add new codes, or to translate the message strings to
 * some other language.
 * A set of error-reporting macros are defined too.  Some applications using
 * the JPEG library may wish to include this file to get the error codes
 * and/or the macros.
 */

/*
 * To define the enum list of message codes, include this file without
 * defining macro JMESSAGE.  To create a message string table, include it
 * again with a suitable JMESSAGE definition (see jerror.c for an example).
 */
#ifndef JMESSAGE
#ifndef JERROR_H
/* First time through, define the enum list */
#define JMAKE_ENUM_LIST
#else
/* Repeated inclusions of this file are no-ops unless JMESSAGE is defined */
#define JMESSAGE(code, string)
#endif /* JERROR_H */
#endif /* JMESSAGE */

#ifdef JMAKE_ENUM_LIST

typedef enum {

#define JMESSAGE(code, string)  code,

#endif /* JMAKE_ENUM_LIST */

JMESSAGE(JMSG_NOMESSAGE, "Bogus message code %d") /* Must be first entry! */

/* For maintenance convenience, list is alphabetical by message code name */
#if JPEG_LIB_VERSION < 70
JMESSAGE(JERR_ARITH_NOTIMPL, "Sorry, arithmetic coding is not implemented")
#endif
JMESSAGE(JERR_BAD_ALIGN_TYPE, "ALIGN_TYPE is wrong, please fix")
JMESSAGE(JERR_BAD_ALLOC_CHUNK, "MAX_ALLOC_CHUNK is wrong, please fix")
JMESSAGE(JERR_BAD_BUFFER_MODE, "Bogus buffer control mode")
JMESSAGE(JERR_BAD_COMPONENT_ID, "Invalid component ID %d in SOS")
#if JPEG_LIB_VERSION >= 70
JMESSAGE(JERR_BAD_CROP_SPEC, "Invalid crop request")
#endif
JMESSAGE(JERR_BAD_DCT_COEF, "DCT coefficient out of range")
JMESSAGE(JERR_BAD_DCTSIZE, "IDCT output block size %d not supported")
#if JPEG_LIB_VERSION >= 70
JMESSAGE(JERR_BAD_DROP_SAMPLING,
         "Component index %d: mismatching sampling ratio %d:%d, %d:%d, %c")
#endif
JMESSAGE(JERR_BAD_HUFF_TABLE, "Bogus Huffman table definition")
JMESSAGE(JERR_BAD_IN_COLORSPACE, "Bogus input colorspace")
JMESSAGE(JERR_BAD_J_COLORSPACE, "Bogus JPEG colorspace")
JMESSAGE(JERR_BAD_LENGTH, "Bogus marker length")
JMESSAGE(JERR_BAD_LIB_VERSION,
         "Wrong JPEG library version: library is %d, caller expects %d")
JMESSAGE(JERR_BAD_MCU_SIZE, "Sampling factors too large for interleaved scan")
JMESSAGE(JERR_BAD_POOL_ID, "Invalid memory pool code %d")
JMESSAGE(JERR_BAD_PRECISION, "Unsupported JPEG data precision %d")
JMESSAGE(JERR_BAD_PROGRESSION,
         "Invalid progressive parameters Ss=%d Se=%d Ah=%d Al=%d")
JMESSAGE(JERR_BAD_PROG_SCRIPT,
         "Invalid progressive parameters at scan script entry %d")
JMESSAGE(JERR_BAD_SAMPLING, "Bogus sampling factors")
JMESSAGE(JERR_BAD_SCAN_SCRIPT, "Invalid scan script at entry %d")
JMESSAGE(JERR_BAD_STATE, "Improper call to JPEG library in state %d")
JMESSAGE(JERR_BAD_STRUCT_SIZE,
         "JPEG parameter struct mismatch: library thinks size is %u, caller expects %u")
JMESSAGE(JERR_BAD_VIRTUAL_ACCESS, "Bogus virtual array access")
JMESSAGE(JERR_BUFFER_SIZE, "Buffer passed to JPEG library is too small")
JMESSAGE(JERR_CANT_SUSPEND, "Suspension not allowed here")
JMESSAGE(JERR_CCIR601_NOTIMPL, "CCIR601 sampling not implemented yet")
JMESSAGE(JERR_COMPONENT_COUNT, "Too many color components: %d, max %d")
JMESSAGE(JERR_CONVERSION_NOTIMPL, "Unsupported color conversion request")
JMESSAGE(JERR_DAC_INDEX, "Bogus DAC index %d")
JMESSAGE(JERR_DAC_VALUE, "Bogus DAC value 0x%x")
JMESSAGE(JERR_DHT_INDEX, "Bogus DHT index %d")
JMESSAGE(JERR_DQT_INDEX, "Bogus DQT index %d")
JMESSAGE(JERR_EMPTY_IMAGE, "Empty JPEG image (DNL not supported)")
JMESSAGE(JERR_EMS_READ, "Read from EMS failed")
JMESSAGE(JERR_EMS_WRITE, "Write to EMS failed")
JMESSAGE(JERR_EOI_EXPECTED, "Didn't expect more than one scan")
JMESSAGE(JERR_FILE_READ, "Input file read error")
JMESSAGE(JERR_FILE_WRITE, "Output file write error --- out of disk space?")
JMESSAGE(JERR_FRACT_SAMPLE_NOTIMPL, "Fractional sampling not implemented yet")
JMESSAGE(JERR_HUFF_CLEN_OVERFLOW, "Huffman code size table overflow")
JMESSAGE(JERR_HUFF_MISSING_CODE, "Missing Huffman code table entry")
JMESSAGE(JERR_IMAGE_TOO_BIG, "Maximum supported image dimension is %u pixels")
JMESSAGE(JERR_INPUT_EMPTY, "Empty input file")
JMESSAGE(JERR_INPUT_EOF, "Premature end of input file")
JMESSAGE(JERR_MISMATCHED_QUANT_TABLE,
         "Cannot transcode due to multiple use of quantization table %d")
JMESSAGE(JERR_MISSING_DATA, "Scan script does not transmit all data")
JMESSAGE(JERR_MODE_CHANGE, "Invalid color quantization mode change")
JMESSAGE(JERR_NOTIMPL, "Not implemented yet")
JMESSAGE(JERR_NOT_COMPILED, "Requested feature was omitted at compile time")
#if JPEG_LIB_VERSION >= 70
JMESSAGE(JERR_NO_ARITH_TABLE, "Arithmetic table 0x%02x was not defined")
#endif
JMESSAGE(JERR_NO_BACKING_STORE, "Backing store not supported")
JMESSAGE(JERR_NO_HUFF_TABLE, "Huffman table 0x%02x was not defined")
JMESSAGE(JERR_NO_IMAGE, "JPEG datastream contains no image")
JMESSAGE(JERR_NO_QUANT_TABLE, "Quantization table 0x%02x was not defined")
JMESSAGE(JERR_NO_SOI, "Not a JPEG file: starts with 0x%02x 0x%02x")
JMESSAGE(JERR_OUT_OF_MEMORY, "Insufficient memory (case %d)")
JMESSAGE(JERR_QUANT_COMPONENTS,
         "Cannot quantize more than %d color components")
JMESSAGE(JERR_QUANT_FEW_COLORS, "Cannot quantize to fewer than %d colors")
JMESSAGE(JERR_QUANT_MANY_COLORS, "Cannot quantize to more than %d colors")
JMESSAGE(JERR_SOF_DUPLICATE, "Invalid JPEG file structure: two SOF markers")
JMESSAGE(JERR_SOF_NO_SOS, "Invalid JPEG file structure: missing SOS marker")
JMESSAGE(JERR_SOF_UNSUPPORTED, "Unsupported JPEG process: SOF type 0x%02x")
JMESSAGE(JERR_SOI_DUPLICATE, "Invalid JPEG file structure: two SOI markers")
JMESSAGE(JERR_SOS_NO_SOF, "Invalid JPEG file structure: SOS before SOF")
JMESSAGE(JERR_TFILE_CREATE, "Failed to create temporary file %s")
JMESSAGE(JERR_TFILE_READ, "Read failed on temporary file")
JMESSAGE(JERR_TFILE_SEEK, "Seek failed on temporary file")
JMESSAGE(JERR_TFILE_WRITE,
         "Write failed on temporary file --- out of disk space?")
JMESSAGE(JERR_TOO_LITTLE_DATA, "Application transferred too few scanlines")
JMESSAGE(JERR_UNKNOWN_MARKER, "Unsupported marker type 0x%02x")
JMESSAGE(JERR_VIRTUAL_BUG, "Virtual array controller messed up")
JMESSAGE(JERR_WIDTH_OVERFLOW, "Image too wide for this implementation")
JMESSAGE(JERR_XMS_READ, "Read from XMS failed")
JMESSAGE(JERR_XMS_WRITE, "Write to XMS failed")
JMESSAGE(JMSG_COPYRIGHT, JCOPYRIGHT_SHORT)
JMESSAGE(JMSG_VERSION, JVERSION)
JMESSAGE(JTRC_16BIT_TABLES,
         "Caution: quantization tables are too coarse for baseline JPEG")
JMESSAGE(JTRC_ADOBE,
         "Adobe APP14 marker: version %d, flags 0x%04x 0x%04x, transform %d")
JMESSAGE(JTRC_APP0, "Unknown APP0 marker (not JFIF), length %u")
JMESSAGE(JTRC_APP14, "Unknown APP14 marker (not Adobe), length %u")
JMESSAGE(JTRC_DAC, "Define Arithmetic Table 0x%02x: 0x%02x")
JMESSAGE(JTRC_DHT, "Define Huffman Table 0x%02x")
JMESSAGE(JTRC_DQT, "Define Quantization Table %d  precision %d")
JMESSAGE(JTRC_DRI, "Define Restart Interval %u")
JMESSAGE(JTRC_EMS_CLOSE, "Freed EMS handle %u")
JMESSAGE(JTRC_EMS_OPEN, "Obtained EMS handle %u")
JMESSAGE(JTRC_EOI, "End Of Image")
JMESSAGE(JTRC_HUFFBITS, "        %3d %3d %3d %3d %3d %3d %3d %3d")
JMESSAGE(JTRC_JFIF, "JFIF APP0 marker: version %d.%02d, density %dx%d  %d")
JMESSAGE(JTRC_JFIF_BADTHUMBNAILSIZE,
         "Warning: thumbnail image size does not match data length %u")
JMESSAGE(JTRC_JFIF_EXTENSION, "JFIF extension marker: type 0x%02x, length %u")
JMESSAGE(JTRC_JFIF_THUMBNAIL, "    with %d x %d thumbnail image")
JMESSAGE(JTRC_MISC_MARKER, "Miscellaneous marker 0x%02x, length %u")
JMESSAGE(JTRC_PARMLESS_MARKER, "Unexpected marker 0x%02x")
JMESSAGE(JTRC_QUANTVALS, "        %4u %4u %4u %4u %4u %4u %4u %4u")
JMESSAGE(JTRC_QUANT_3_NCOLORS, "Quantizing to %d = %d*%d*%d colors")
JMESSAGE(JTRC_QUANT_NCOLORS, "Quantizing to %d colors")
JMESSAGE(JTRC_QUANT_SELECTED, "Selected %d colors for quantization")
JMESSAGE(JTRC_RECOVERY_ACTION, "At marker 0x%02x, recovery action %d")
JMESSAGE(JTRC_RST, "RST%d")
JMESSAGE(JTRC_SMOOTH_NOTIMPL,
         "Smoothing not supported with nonstandard sampling ratios")
JMESSAGE(JTRC_SOF, "Start Of Frame 0x%02x: width=%u, height=%u, components=%d")
JMESSAGE(JTRC_SOF_COMPONENT, "    Component %d: %dhx%dv q=%d")
JMESSAGE(JTRC_SOI, "Start of Image")
JMESSAGE(JTRC_SOS, "Start Of Scan: %d components")
JMESSAGE(JTRC_SOS_COMPONENT, "    Component %d: dc=%d ac=%d")
JMESSAGE(JTRC_SOS_PARAMS, "  Ss=%d, Se=%d, Ah=%d, Al=%d")
JMESSAGE(JTRC_TFILE_CLOSE, "Closed temporary file %s")
JMESSAGE(JTRC_TFILE_OPEN, "Opened temporary file %s")
JMESSAGE(JTRC_THUMB_JPEG,
         "JFIF extension marker: JPEG-compressed thumbnail image, length %u")
JMESSAGE(JTRC_THUMB_PALETTE,
         "JFIF extension marker: palette thumbnail image, length %u")
JMESSAGE(JTRC_THUMB_RGB,
         "JFIF extension marker: RGB thumbnail image, length %u")
JMESSAGE(JTRC_UNKNOWN_IDS,
         "Unrecognized component IDs %d %d %d, assuming YCbCr")
JMESSAGE(JTRC_XMS_CLOSE, "Freed XMS handle %u")
JMESSAGE(JTRC_XMS_OPEN, "Obtained XMS handle %u")
JMESSAGE(JWRN_ADOBE_XFORM, "Unknown Adobe color transform code %d")
#if JPEG_LIB_VERSION >= 70
JMESSAGE(JWRN_ARITH_BAD_CODE, "Corrupt JPEG data: bad arithmetic code")
#endif
JMESSAGE(JWRN_BOGUS_PROGRESSION,
         "Inconsistent progression sequence for component %d coefficient %d")
JMESSAGE(JWRN_EXTRANEOUS_DATA,
         "Corrupt JPEG data: %u extraneous bytes before marker 0x%02x")
JMESSAGE(JWRN_HIT_MARKER, "Corrupt JPEG data: premature end of data segment")
JMESSAGE(JWRN_HUFF_BAD_CODE, "Corrupt JPEG data: bad Huffman code")
JMESSAGE(JWRN_JFIF_MAJOR, "Warning: unknown JFIF revision number %d.%02d")
JMESSAGE(JWRN_JPEG_EOF, "Premature end of JPEG file")
JMESSAGE(JWRN_MUST_RESYNC,
         "Corrupt JPEG data: found marker 0x%02x instead of RST%d")
JMESSAGE(JWRN_NOT_SEQUENTIAL, "Invalid SOS parameters for sequential JPEG")
JMESSAGE(JWRN_TOO_MUCH_DATA, "Application transferred too many scanlines")
#if JPEG_LIB_VERSION < 70
JMESSAGE(JERR_BAD_CROP_SPEC, "Invalid crop request")
#if defined(C_ARITH_CODING_SUPPORTED) || defined(D_ARITH_CODING_SUPPORTED)
JMESSAGE(JERR_NO_ARITH_TABLE, "Arithmetic table 0x%02x was not defined")
JMESSAGE(JWRN_ARITH_BAD_CODE, "Corrupt JPEG data: bad arithmetic code")
#endif
#endif
JMESSAGE(JWRN_BOGUS_ICC, "Corrupt JPEG data: bad ICC marker")

#ifdef JMAKE_ENUM_LIST

  JMSG_LASTMSGCODE
} J_MESSAGE_CODE;

#undef JMAKE_ENUM_LIST
#endif /* JMAKE_ENUM_LIST */

/* Zap JMESSAGE macro so that future re-inclusions do nothing by default */
#undef JMESSAGE


#ifndef JERROR_H
#define JERROR_H

/* Macros to simplify using the error and trace message stuff */
/* The first parameter is either type of cinfo pointer */

/* Fatal errors (print message and exit) */
#define ERREXIT(cinfo, code) \
  ((cinfo)->err->msg_code = (code), \
   (*(cinfo)->err->error_exit) ((j_common_ptr)(cinfo)))
#define ERREXIT1(cinfo, code, p1) \
  ((cinfo)->err->msg_code = (code), \
   (cinfo)->err->msg_parm.i[0] = (p1), \
   (*(cinfo)->err->error_exit) ((j_common_ptr)(cinfo)))
#define ERREXIT2(cinfo, code, p1, p2) \
  ((cinfo)->err->msg_code = (code), \
   (cinfo)->err->msg_parm.i[0] = (p1), \
   (cinfo)->err->msg_parm.i[1] = (p2), \
   (*(cinfo)->err->error_exit) ((j_common_ptr)(cinfo)))
#define ERREXIT3(cinfo, code, p1, p2, p3) \
  ((cinfo)->err->msg_code = (code), \
   (cinfo)->err->msg_parm.i[0] = (p1), \
   (cinfo)->err->msg_parm.i[1] = (p2), \
   (cinfo)->err->msg_parm.i[2] = (p3), \
   (*(cinfo)->err->error_exit) ((j_common_ptr)(cinfo)))
#define ERREXIT4(cinfo, code, p1, p2, p3, p4) \
  ((cinfo)->err->msg_code = (code), \
   (cinfo)->err->msg_parm.i[0] = (p1), \
   (cinfo)->err->msg_parm.i[1] = (p2), \
   (cinfo)->err->msg_parm.i[2] = (p3), \
   (cinfo)->err->msg_parm.i[3] = (p4), \
   (*(cinfo)->err->error_exit) ((j_common_ptr)(cinfo)))
#define ERREXITS(cinfo, code, str) \
  ((cinfo)->err->msg_code = (code), \
   strncpy((cinfo)->err->msg_parm.s, (str), JMSG_STR_PARM_MAX), \
   (*(cinfo)->err->error_exit) ((j_common_ptr)(cinfo)))

#define MAKESTMT(stuff)         do { stuff } while (0)

/* Nonfatal errors (we can keep going, but the data is probably corrupt) */
#define WARNMS(cinfo, code) \
  ((cinfo)->err->msg_code = (code), \
   (*(cinfo)->err->emit_message) ((j_common_ptr)(cinfo), -1))
#define WARNMS1(cinfo, code, p1) \
  ((cinfo)->err->msg_code = (code), \
   (cinfo)->err->msg_parm.i[0] = (p1), \
   (*(cinfo)->err->emit_message) ((j_common_ptr)(cinfo), -1))
#define WARNMS2(cinfo, code, p1, p2) \
  ((cinfo)->err->msg_code = (code), \
   (cinfo)->err->msg_parm.i[0] = (p1), \
   (cinfo)->err->msg_parm.i[1] = (p2), \
   (*(cinfo)->err->emit_message) ((j_common_ptr)(cinfo), -1))

/* Informational/debugging messages */
#define TRACEMS(cinfo, lvl, code) \
  ((cinfo)->err->msg_code = (code), \
   (*(cinfo)->err->emit_message) ((j_common_ptr)(cinfo), (lvl)))
#define TRACEMS1(cinfo, lvl, code, p1) \
  ((cinfo)->err->msg_code = (code), \
   (cinfo)->err->msg_parm.i[0] = (p1), \
   (*(cinfo)->err->emit_message) ((j_common_ptr)(cinfo), (lvl)))
#define TRACEMS2(cinfo, lvl, code, p1, p2) \
  ((cinfo)->err->msg_code = (code), \
   (cinfo)->err->msg_parm.i[0] = (p1), \
   (cinfo)->err->msg_parm.i[1] = (p2), \
   (*(cinfo)->err->emit_message) ((j_common_ptr)(cinfo), (lvl)))
#define TRACEMS3(cinfo, lvl, code, p1, p2, p3) \
  MAKESTMT(int *_mp = (cinfo)->err->msg_parm.i; \
           _mp[0] = (p1);  _mp[1] = (p2);  _mp[2] = (p3); \
           (cinfo)->err->msg_code = (code); \
           (*(cinfo)->err->emit_message) ((j_common_ptr)(cinfo), (lvl)); )
#define TRACEMS4(cinfo, lvl, code, p1, p2, p3, p4) \
  MAKESTMT(int *_mp = (cinfo)->err->msg_parm.i; \
           _mp[0] = (p1);  _mp[1] = (p2);  _mp[2] = (p3);  _mp[3] = (p4); \
           (cinfo)->err->msg_code = (code); \
           (*(cinfo)->err->emit_message) ((j_common_ptr)(cinfo), (lvl)); )
#define TRACEMS5(cinfo, lvl, code, p1, p2, p3, p4, p5) \
  MAKESTMT(int *_mp = (cinfo)->err->msg_parm.i; \
           _mp[0] = (p1);  _mp[1] = (p2);  _mp[2] = (p3);  _mp[3] = (p4); \
           _mp[4] = (p5); \
           (cinfo)->err->msg_code = (code); \
           (*(cinfo)->err->emit_message) ((j_common_ptr)(cinfo), (lvl)); )
#define TRACEMS8(cinfo, lvl, code, p1, p2, p3, p4, p5, p6, p7, p8) \
  MAKESTMT(int *_mp = (cinfo)->err->msg_parm.i; \
           _mp[0] = (p1);  _mp[1] = (p2);  _mp[2] = (p3);  _mp[3] = (p4); \
           _mp[4] = (p5);  _mp[5] = (p6);  _mp[6] = (p7);  _mp[7] = (p8); \
           (cinfo)->err->msg_code = (code); \
           (*(cinfo)->err->emit_message) ((j_common_ptr)(cinfo), (lvl)); )
#define TRACEMSS(cinfo, lvl, code, str) \
  ((cinfo)->err->msg_code = (code), \
   strncpy((cinfo)->err->msg_parm.s, (str), JMSG_STR_PARM_MAX), \
   (*(cinfo)->err->emit_message) ((j_common_ptr)(cinfo), (lvl)))

#endif /* JERROR_H */
#endif

#ifdef __cplusplus
#ifndef DONT_USE_EXTERN_C
}
#endif
#endif

#endif /* JPEGLIB_H */
