jdhuff.c File Reference

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

Include dependency graph for jdhuff.c:

Go to the source code of this file.

Classes
struct	huff_entropy_decoder
struct	savable_state

Macros
#define	ASSIGN_STATE(dest, src)   ((dest) = (src))
#define	HUFF_EXTEND(x, s)   ((x) < extend_test[s] ? (x) + extend_offset[s] : (x))
#define	JPEG_INTERNALS
#define	MIN_GET_BITS   (BIT_BUF_SIZE-7)

Typedefs
typedef huff_entropy_decoder *	huff_entropy_ptr

Functions
	decode_mcu (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
	jinit_huff_decoder (j_decompress_ptr cinfo)
	jpeg_fill_bit_buffer (bitread_working_state *state, register bit_buf_type get_buffer, register int bits_left, int nbits)
	jpeg_huff_decode (bitread_working_state *state, register bit_buf_type get_buffer, register int bits_left, d_derived_tbl *htbl, int min_bits)
	jpeg_make_d_derived_tbl (j_decompress_ptr cinfo, boolean isDC, int tblno, d_derived_tbl **pdtbl)
	process_restart (j_decompress_ptr cinfo)
	start_pass_huff_decoder (j_decompress_ptr cinfo)

Variables
static const int	extend_offset [16]
static const int	extend_test [16]

Macro Definition Documentation

#define ASSIGN_STATE	(		dest,
			src
	)		((dest) = (src))

Definition at line 40 of file jdhuff.c.

#define HUFF_EXTEND	(		x,
			s
	)		((x) < extend_test[s] ? (x) + extend_offset[s] : (x))

Definition at line 447 of file jdhuff.c.

#define JPEG_INTERNALS

Definition at line 17 of file jdhuff.c.

#define MIN_GET_BITS   (BIT_BUF_SIZE-7)

Definition at line 287 of file jdhuff.c.

Typedef Documentation

typedef huff_entropy_decoder* huff_entropy_ptr

Definition at line 78 of file jdhuff.c.

Function Documentation

decode_mcu	(	j_decompress_ptr	cinfo,
		JBLOCKROW *	MCU_data
	)

Definition at line 517 of file jdhuff.c.

jinit_huff_decoder

(

j_decompress_ptr

cinfo

)

Definition at line 635 of file jdhuff.c.

jpeg_fill_bit_buffer	(	bitread_working_state *	state,
		register bit_buf_type	get_buffer,
		register int	bits_left,
		int	nbits
	)

Definition at line 292 of file jdhuff.c.

jpeg_huff_decode	(	bitread_working_state *	state,
		register bit_buf_type	get_buffer,
		register int	bits_left,
		d_derived_tbl *	htbl,
		int	min_bits
	)

Definition at line 398 of file jdhuff.c.

jpeg_make_d_derived_tbl	(	j_decompress_ptr	cinfo,
		boolean	isDC,
		int	tblno,
		d_derived_tbl **	pdtbl
	)

Definition at line 149 of file jdhuff.c.

process_restart

(

j_decompress_ptr

cinfo

)

Definition at line 468 of file jdhuff.c.

start_pass_huff_decoder

(

j_decompress_ptr

cinfo

)

Definition at line 86 of file jdhuff.c.

Variable Documentation

const int extend_offset[16]

static

Initial value:

= 
  { 0, ((-1)<<1) + 1, ((-1)<<2) + 1, ((-1)<<3) + 1, ((-1)<<4) + 1,
    ((-1)<<5) + 1, ((-1)<<6) + 1, ((-1)<<7) + 1, ((-1)<<8) + 1,
    ((-1)<<9) + 1, ((-1)<<10) + 1, ((-1)<<11) + 1, ((-1)<<12) + 1,
    ((-1)<<13) + 1, ((-1)<<14) + 1, ((-1)<<15) + 1 }

Definition at line 453 of file jdhuff.c.

const int extend_test[16]

static

Initial value:

=   
  { 0, 0x0001, 0x0002, 0x0004, 0x0008, 0x0010, 0x0020, 0x0040, 0x0080,
    0x0100, 0x0200, 0x0400, 0x0800, 0x1000, 0x2000, 0x4000 }

Definition at line 449 of file jdhuff.c.