jutils.c File Reference

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

Go to the source code of this file.

Macros
#define	JPEG_INTERNALS
#define	FMEMCOPY(dest, src, size)   MEMCOPY(dest,src,size)
#define	FMEMZERO(target, size)   MEMZERO(target,size)

Functions
	jdiv_round_up (long a, long b)
	jround_up (long a, long b)
	jcopy_sample_rows (JSAMPARRAY input_array, int source_row, JSAMPARRAY output_array, int dest_row, int num_rows, JDIMENSION num_cols)
	jcopy_block_row (JBLOCKROW input_row, JBLOCKROW output_row, JDIMENSION num_blocks)
	jzero_far (void FAR *target, size_t bytestozero)

Variables
const int	jpeg_natural_order [DCTSIZE2+16]

Macro Definition Documentation

FMEMCOPY

#define FMEMCOPY	(		dest,
			src,
			size
	)		MEMCOPY(dest,src,size)

Definition at line 100 of file jutils.c.

Referenced by jcopy_block_row(), and jcopy_sample_rows().

FMEMZERO

#define FMEMZERO	(		target,
			size
	)		MEMZERO(target,size)

Definition at line 101 of file jutils.c.

Referenced by jzero_far().

JPEG_INTERNALS

#define JPEG_INTERNALS

Definition at line 14 of file jutils.c.

Function Documentation

jcopy_block_row()

jcopy_block_row	(	JBLOCKROW	input_row,
		JBLOCKROW	output_row,
		JDIMENSION	num_blocks
	)

Definition at line 145 of file jutils.c.

References DCTSIZE2, FMEMCOPY, GLOBAL, num_blocks, output_row, and SIZEOF.

Referenced by decompress_smooth_data().

jcopy_sample_rows()

jcopy_sample_rows	(	JSAMPARRAY	input_array,
		int	source_row,
		JSAMPARRAY	output_array,
		int	dest_row,
		int	num_rows,
		JDIMENSION	num_cols
	)

Definition at line 111 of file jutils.c.

References dest_row, FMEMCOPY, GLOBAL, SIZEOF, and source_row.

Referenced by expand_bottom_edge(), fullsize_downsample(), grayscale_convert(), h2v2_upsample(), int_upsample(), merged_2v_upsample(), and pre_process_context().

jdiv_round_up()

jdiv_round_up	(	long	a,
		long	b
	)

Definition at line 72 of file jutils.c.

References GLOBAL.

Referenced by initial_setup(), jpeg_calc_output_dimensions(), and per_scan_setup().

jround_up()

jround_up	(	long	a,
		long	b
	)

Definition at line 81 of file jutils.c.

Referenced by jinit_c_coef_controller(), jinit_c_main_controller(), jinit_d_coef_controller(), jinit_d_post_controller(), and jinit_upsampler().

jzero_far()

jzero_far	(	void FAR *	target,
		size_t	bytestozero
	)

Definition at line 165 of file jutils.c.

References bytestozero, FAR, FMEMZERO, and ptr.

Referenced by access_virt_barray(), access_virt_sarray(), compress_data(), compress_first_pass(), decompress_onepass(), quantize_fs_dither(), quantize_ord_dither(), start_pass_1_quant(), start_pass_2_quant(), and transencode_coef_controller().

Variable Documentation

jpeg_natural_order

const int jpeg_natural_order[DCTSIZE2+16]

Initial value:

= {
  0,  1,  8, 16,  9,  2,  3, 10,
 17, 24, 32, 25, 18, 11,  4,  5,
 12, 19, 26, 33, 40, 48, 41, 34,
 27, 20, 13,  6,  7, 14, 21, 28,
 35, 42, 49, 56, 57, 50, 43, 36,
 29, 22, 15, 23, 30, 37, 44, 51,
 58, 59, 52, 45, 38, 31, 39, 46,
 53, 60, 61, 54, 47, 55, 62, 63,
 63, 63, 63, 63, 63, 63, 63, 63, 
 63, 63, 63, 63, 63, 63, 63, 63
}

Definition at line 53 of file jutils.c.

Referenced by decode_mcu(), decode_mcu_AC_first(), decode_mcu_AC_refine(), emit_dqt(), encode_mcu_AC_first(), encode_mcu_AC_refine(), encode_one_block(), get_dqt(), and htest_one_block().