jpeglib.h File Reference

#include "jconfig.h"
#include "jmorecfg.h"
#include "jpegint.h"
#include "jerror.h"

Go to the source code of this file.

Classes
struct	JQUANT_TBL
struct	JHUFF_TBL
struct	jpeg_component_info
struct	jpeg_scan_info
struct	jpeg_marker_struct
struct	jpeg_common_struct
struct	jpeg_compress_struct
struct	jpeg_decompress_struct
struct	jpeg_error_mgr
struct	jpeg_progress_mgr
struct	jpeg_destination_mgr
struct	jpeg_source_mgr
struct	jpeg_memory_mgr

Macros
#define	JPEG_LIB_VERSION   62 /* Version 6b */
#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 */
#define	C_MAX_BLOCKS_IN_MCU   10 /* compressor's limit on blocks per MCU */
#define	D_MAX_BLOCKS_IN_MCU   10 /* decompressor's limit on blocks per MCU */
#define	JDCT_DEFAULT   JDCT_ISLOW
#define	JDCT_FASTEST   JDCT_IFAST
#define	jpeg_common_fields
#define	JMSG_LENGTH_MAX   200 /* recommended size of format_message buffer */
#define	JMSG_STR_PARM_MAX   80
#define	JPOOL_PERMANENT   0 /* lasts until master record is destroyed */
#define	JPOOL_IMAGE   1 /* lasts until done with image/datastream */
#define	JPOOL_NUMPOOLS   2
#define	JPP(arglist)
#define	jpeg_create_compress(cinfo)
#define	jpeg_create_decompress(cinfo)
#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 */
#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 */
#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 */

Typedefs
typedef JSAMPLE FAR *	JSAMPROW
typedef JSAMPROW *	JSAMPARRAY
typedef JSAMPARRAY *	JSAMPIMAGE
typedef JCOEF	JBLOCK[DCTSIZE2]
typedef JBLOCK FAR *	JBLOCKROW
typedef JBLOCKROW *	JBLOCKARRAY
typedef JBLOCKARRAY *	JBLOCKIMAGE
typedef JCOEF FAR *	JCOEFPTR
typedef struct jpeg_marker_struct FAR *	jpeg_saved_marker_ptr
typedef struct jpeg_common_struct *	j_common_ptr
typedef struct jpeg_compress_struct *	j_compress_ptr
typedef struct jpeg_decompress_struct *	j_decompress_ptr
typedef struct jvirt_sarray_control *	jvirt_sarray_ptr
typedef struct jvirt_barray_control *	jvirt_barray_ptr

Enumerations
enum	J_COLOR_SPACE {   JCS_UNKNOWN , JCS_GRAYSCALE , JCS_RGB , JCS_YCbCr ,   JCS_CMYK , JCS_YCCK }
enum	J_DCT_METHOD { JDCT_ISLOW , JDCT_IFAST , JDCT_FLOAT }
enum	J_DITHER_MODE { JDITHER_NONE , JDITHER_ORDERED , JDITHER_FS }

Functions
typedef	JMETHOD (boolean, jpeg_marker_parser_method,(j_decompress_ptr cinfo))
	EXTERN (struct jpeg_error_mgr *) jpeg_std_error JPP((struct jpeg_error_mgr *err))
	EXTERN (void) jpeg_CreateCompress JPP((j_compress_ptr cinfo
	EXTERN (int) jpeg_quality_scaling JPP((int quality))
	EXTERN (JQUANT_TBL *) jpeg_alloc_quant_table JPP((j_common_ptr cinfo))
	EXTERN (JHUFF_TBL *) jpeg_alloc_huff_table JPP((j_common_ptr cinfo))
	EXTERN (JDIMENSION) jpeg_write_scanlines JPP((j_compress_ptr cinfo
	EXTERN (boolean) jpeg_start_decompress JPP((j_decompress_ptr cinfo))
	EXTERN (jvirt_barray_ptr *) jpeg_read_coefficients JPP((j_decompress_ptr cinfo))

Variables
int	version
int size_t	structsize
FILE *	outfile
FILE *	infile
J_COLOR_SPACE	colorspace
int	quality
int boolean	force_baseline
int	scale_factor
int	which_tbl
int const unsigned int *	basic_table
boolean	suppress
boolean	write_all_tables
JSAMPARRAY	scanlines
JSAMPARRAY JDIMENSION	num_lines
JSAMPIMAGE	data
int	marker
int const JOCTET *	dataptr
int const JOCTET unsigned int	datalen
int	val
boolean	require_image
JSAMPARRAY JDIMENSION	max_lines
int	scan_number
int	marker_code
int unsigned int	length_limit
int jpeg_marker_parser_method	routine
jvirt_barray_ptr *	coef_arrays
j_compress_ptr	dstinfo
int	desired

Macro Definition Documentation

C_MAX_BLOCKS_IN_MCU

#define C_MAX_BLOCKS_IN_MCU   10 /* compressor's limit on blocks per MCU */

D_MAX_BLOCKS_IN_MCU

#define D_MAX_BLOCKS_IN_MCU   10 /* decompressor's limit on blocks per MCU */

DCTSIZE

#define DCTSIZE   8 /* The basic DCT block is 8x8 samples */

DCTSIZE2

#define DCTSIZE2   64 /* DCTSIZE squared; # of elements in a block */

JDCT_DEFAULT

#define JDCT_DEFAULT   JDCT_ISLOW

JDCT_FASTEST

#define JDCT_FASTEST   JDCT_IFAST

JMSG_LENGTH_MAX

#define JMSG_LENGTH_MAX   200 /* recommended size of format_message buffer */

JMSG_STR_PARM_MAX

#define JMSG_STR_PARM_MAX   80

JPEG_APP0

#define JPEG_APP0   0xE0 /* APP0 marker code */

JPEG_COM

#define JPEG_COM   0xFE /* COM marker code */

jpeg_common_fields

#define jpeg_common_fields

Value:

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 */

jpeg_create_compress

#define jpeg_create_compress

(

cinfo

)

Value:

jpeg_CreateCompress((cinfo), JPEG_LIB_VERSION, \
                    (size_t) sizeof(struct jpeg_compress_struct))

jpeg_create_decompress

#define jpeg_create_decompress

(

cinfo

)

Value:

jpeg_CreateDecompress((cinfo), JPEG_LIB_VERSION, \
                      (size_t) sizeof(struct jpeg_decompress_struct))

JPEG_EOI

#define JPEG_EOI   0xD9 /* EOI marker code */

JPEG_HEADER_OK

#define JPEG_HEADER_OK   1 /* Found valid image datastream */

JPEG_HEADER_TABLES_ONLY

#define JPEG_HEADER_TABLES_ONLY   2 /* Found valid table-specs-only datastream */

JPEG_LIB_VERSION

#define JPEG_LIB_VERSION   62 /* Version 6b */

JPEG_REACHED_EOI

#define JPEG_REACHED_EOI   2 /* Reached end of image */

JPEG_REACHED_SOS

#define JPEG_REACHED_SOS   1 /* Reached start of new scan */

JPEG_ROW_COMPLETED

#define JPEG_ROW_COMPLETED   3 /* Completed one iMCU row */

JPEG_RST0

#define JPEG_RST0   0xD0 /* RST0 marker code */

JPEG_SCAN_COMPLETED

#define JPEG_SCAN_COMPLETED   4 /* Completed last iMCU row of a scan */

JPEG_SUSPENDED

#define JPEG_SUSPENDED   0 /* Suspended due to lack of input data */

JPOOL_IMAGE

#define JPOOL_IMAGE   1 /* lasts until done with image/datastream */

JPOOL_NUMPOOLS

#define JPOOL_NUMPOOLS   2

JPOOL_PERMANENT

#define JPOOL_PERMANENT   0 /* lasts until master record is destroyed */

JPP

#define JPP

(

arglist

)

Value:

arglist

MAX_COMPS_IN_SCAN

#define MAX_COMPS_IN_SCAN   4 /* JPEG limit on # of components in one scan */

MAX_SAMP_FACTOR

#define MAX_SAMP_FACTOR   4 /* JPEG limit on sampling factors */

NUM_ARITH_TBLS

#define NUM_ARITH_TBLS   16 /* Arith-coding tables are numbered 0..15 */

NUM_HUFF_TBLS

#define NUM_HUFF_TBLS   4 /* Huffman tables are numbered 0..3 */

NUM_QUANT_TBLS

#define NUM_QUANT_TBLS   4 /* Quantization tables are numbered 0..3 */

Typedef Documentation

j_common_ptr

typedef struct jpeg_common_struct* j_common_ptr

j_compress_ptr

typedef struct jpeg_compress_struct* j_compress_ptr

j_decompress_ptr

typedef struct jpeg_decompress_struct* j_decompress_ptr

JBLOCK

typedef JCOEF JBLOCK[DCTSIZE2]

JBLOCKARRAY

typedef JBLOCKROW* JBLOCKARRAY

JBLOCKIMAGE

typedef JBLOCKARRAY* JBLOCKIMAGE

JBLOCKROW

typedef JBLOCK FAR* JBLOCKROW

JCOEFPTR

typedef JCOEF FAR* JCOEFPTR

jpeg_saved_marker_ptr

typedef struct jpeg_marker_struct FAR* jpeg_saved_marker_ptr

JSAMPARRAY

typedef JSAMPROW* JSAMPARRAY

JSAMPIMAGE

typedef JSAMPARRAY* JSAMPIMAGE

JSAMPROW

typedef JSAMPLE FAR* JSAMPROW

jvirt_barray_ptr

typedef struct jvirt_barray_control* jvirt_barray_ptr

jvirt_sarray_ptr

typedef struct jvirt_sarray_control* jvirt_sarray_ptr

Enumeration Type Documentation

J_COLOR_SPACE

enum J_COLOR_SPACE

Enumerator
JCS_UNKNOWN
JCS_GRAYSCALE
JCS_RGB
JCS_YCbCr
JCS_CMYK
JCS_YCCK

J_DCT_METHOD

enum J_DCT_METHOD

Enumerator
JDCT_ISLOW
JDCT_IFAST
JDCT_FLOAT

J_DITHER_MODE

enum J_DITHER_MODE

Enumerator
JDITHER_NONE
JDITHER_ORDERED
JDITHER_FS

Function Documentation

EXTERN() [1/8]

EXTERN

(

boolean

)

EXTERN() [2/8]

EXTERN

(

int

)

EXTERN() [3/8]

EXTERN

(

JDIMENSION

)

EXTERN() [4/8]

EXTERN

(

JHUFF_TBL *

)

EXTERN() [5/8]

EXTERN

(

JQUANT_TBL *

)

EXTERN() [6/8]

EXTERN

(

jvirt_barray_ptr *

)

EXTERN() [7/8]

EXTERN

(

struct jpeg_error_mgr *

)

EXTERN() [8/8]

EXTERN

(

void

)

JMETHOD()

typedef JMETHOD	(	boolean	,
		jpeg_marker_parser_method	,
		(j_decompress_ptr cinfo)	)

Variable Documentation

basic_table

int const unsigned int* basic_table

coef_arrays

jvirt_barray_ptr* coef_arrays

colorspace

J_COLOR_SPACE colorspace

data

JSAMPIMAGE data

datalen

int unsigned int datalen

dataptr

int const JOCTET* dataptr

desired

int desired

dstinfo

j_compress_ptr dstinfo

force_baseline

int const unsigned int int boolean force_baseline

infile

FILE* infile

length_limit

int unsigned int length_limit

marker

int marker

marker_code

int marker_code

max_lines

JSAMPIMAGE JDIMENSION max_lines

num_lines

JSAMPIMAGE JDIMENSION num_lines

outfile

FILE* outfile

quality

int quality

require_image

boolean require_image

routine

int jpeg_marker_parser_method routine

scale_factor

int const unsigned int int scale_factor

scan_number

int scan_number

scanlines

JSAMPARRAY scanlines

structsize

int size_t structsize

suppress

boolean suppress

val

int val

version

int version

which_tbl

int which_tbl

write_all_tables

boolean write_all_tables