jcparam.c File Reference

#include "jinclude.h"
#include "jpeglib.h"

Go to the source code of this file.

Macros
#define	JPEG_INTERNALS
#define	SET_COMP(index, id, hsamp, vsamp, quant, dctbl, actbl)

Functions
	jpeg_add_quant_table (j_compress_ptr cinfo, int which_tbl, const unsigned int *basic_table, int scale_factor, boolean force_baseline)
	jpeg_set_linear_quality (j_compress_ptr cinfo, int scale_factor, boolean force_baseline)
	jpeg_quality_scaling (int quality)
	jpeg_set_quality (j_compress_ptr cinfo, int quality, boolean force_baseline)
	add_huff_table (j_compress_ptr cinfo, JHUFF_TBL **htblptr, const UINT8 *bits, const UINT8 *val)
	std_huff_tables (j_compress_ptr cinfo)
	jpeg_set_defaults (j_compress_ptr cinfo)
	jpeg_default_colorspace (j_compress_ptr cinfo)
	jpeg_set_colorspace (j_compress_ptr cinfo, J_COLOR_SPACE colorspace)
	fill_a_scan (jpeg_scan_info *scanptr, int ci, int Ss, int Se, int Ah, int Al)
	fill_scans (jpeg_scan_info *scanptr, int ncomps, int Ss, int Se, int Ah, int Al)
	fill_dc_scans (jpeg_scan_info *scanptr, int ncomps, int Ah, int Al)
	jpeg_simple_progression (j_compress_ptr cinfo)

Macro Definition Documentation

JPEG_INTERNALS

#define JPEG_INTERNALS

Definition at line 13 of file jcparam.c.

SET_COMP

#define SET_COMP	(		index,
			id,
			hsamp,
			vsamp,
			quant,
			dctbl,
			actbl
	)

Value:

(compptr = &cinfo->comp_info[index], \
   compptr->component_id = (id), \
   compptr->h_samp_factor = (hsamp), \
   compptr->v_samp_factor = (vsamp), \
   compptr->quant_tbl_no = (quant), \
   compptr->dc_tbl_no = (dctbl), \
   compptr->ac_tbl_no = (actbl) )

Referenced by jpeg_set_colorspace().

Function Documentation

add_huff_table()

add_huff_table	(	j_compress_ptr	cinfo,
		JHUFF_TBL **	htblptr,
		const UINT8 *	bits,
		const UINT8 *	val
	)

Definition at line 152 of file jcparam.c.

References ERREXIT, FALSE, jpeg_alloc_huff_table(), LOCAL, MEMCOPY, NULL, and SIZEOF.

Referenced by std_huff_tables().

fill_a_scan()

fill_a_scan	(	jpeg_scan_info *	scanptr,
		int	ci,
		int	Ss,
		int	Se,
		int	Ah,
		int	Al
	)

Definition at line 475 of file jcparam.c.

References LOCAL.

Referenced by jpeg_simple_progression().

fill_dc_scans()

fill_dc_scans	(	jpeg_scan_info *	scanptr,
		int	ncomps,
		int	Ah,
		int	Al
	)

Definition at line 509 of file jcparam.c.

References fill_scans(), GLOBAL, and MAX_COMPS_IN_SCAN.

Referenced by jpeg_simple_progression().

fill_scans()

fill_scans	(	jpeg_scan_info *	scanptr,
		int	ncomps,
		int	Ss,
		int	Se,
		int	Ah,
		int	Al
	)

Definition at line 490 of file jcparam.c.

References LOCAL.

Referenced by fill_dc_scans(), and jpeg_simple_progression().

jpeg_add_quant_table()

jpeg_add_quant_table	(	j_compress_ptr	cinfo,
		int	which_tbl,
		const unsigned int *	basic_table,
		int	scale_factor,
		boolean	force_baseline
	)

Definition at line 23 of file jcparam.c.

References CSTATE_START, DCTSIZE2, ERREXIT1, FALSE, GLOBAL, i, jpeg_alloc_quant_table(), long(), NULL, NUM_QUANT_TBLS, and which_tbl.

Referenced by jpeg_set_linear_quality(), and read_quant_tables().

jpeg_default_colorspace()

jpeg_default_colorspace

(

j_compress_ptr

cinfo

)

Definition at line 359 of file jcparam.c.

References ERREXIT, GLOBAL, JCS_CMYK, JCS_GRAYSCALE, JCS_RGB, JCS_UNKNOWN, JCS_YCbCr, JCS_YCCK, and jpeg_set_colorspace().

Referenced by jpeg_set_defaults().

jpeg_quality_scaling()

jpeg_quality_scaling

(

int

quality

)

Definition at line 106 of file jcparam.c.

References GLOBAL, and quality.

Referenced by jpeg_set_quality().

jpeg_set_colorspace()

jpeg_set_colorspace	(	j_compress_ptr	cinfo,
		J_COLOR_SPACE	colorspace
	)

Definition at line 391 of file jcparam.c.

References colorspace, compptr, CSTATE_START, ERREXIT, ERREXIT1, ERREXIT2, FALSE, JCS_CMYK, JCS_GRAYSCALE, JCS_RGB, JCS_UNKNOWN, JCS_YCbCr, JCS_YCCK, LOCAL, MAX_COMPONENTS, SET_COMP, and TRUE.

Referenced by jpeg_copy_critical_parameters(), and jpeg_default_colorspace().

jpeg_set_defaults()

jpeg_set_defaults

(

j_compress_ptr

cinfo

)

Definition at line 268 of file jcparam.c.

References BITS_IN_JSAMPLE, CSTATE_START, ERREXIT1, FALSE, GLOBAL, i, JDCT_DEFAULT, jpeg_default_colorspace(), jpeg_set_quality(), JPOOL_PERMANENT, MAX_COMPONENTS, NULL, NUM_ARITH_TBLS, SIZEOF, std_huff_tables(), and TRUE.

Referenced by jpeg_copy_critical_parameters(), vl::saveJPG(), and write_JPEG_file().

jpeg_set_linear_quality()

jpeg_set_linear_quality	(	j_compress_ptr	cinfo,
		int	scale_factor,
		boolean	force_baseline
	)

Definition at line 64 of file jcparam.c.

References DCTSIZE2, force_baseline, GLOBAL, jpeg_add_quant_table(), and scale_factor.

Referenced by jpeg_set_quality().

jpeg_set_quality()

jpeg_set_quality	(	j_compress_ptr	cinfo,
		int	quality,
		boolean	force_baseline
	)

Definition at line 132 of file jcparam.c.

References force_baseline, jpeg_quality_scaling(), jpeg_set_linear_quality(), LOCAL, and quality.

Referenced by jpeg_set_defaults(), vl::saveJPG(), and write_JPEG_file().

jpeg_simple_progression()

jpeg_simple_progression

(

j_compress_ptr

cinfo

)

Definition at line 537 of file jcparam.c.

References CSTATE_START, ERREXIT1, fill_a_scan(), fill_dc_scans(), fill_scans(), JCS_YCbCr, JPOOL_PERMANENT, MAX, MAX_COMPS_IN_SCAN, NULL, and SIZEOF.

std_huff_tables()

std_huff_tables

(

j_compress_ptr

cinfo

)

Definition at line 182 of file jcparam.c.

References add_huff_table(), and GLOBAL.

Referenced by jpeg_set_defaults().