jdhuff.c File Reference

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

Go to the source code of this file.

Data Structures
struct	d_derived_tbl
struct	bitread_perm_state
struct	bitread_working_state
struct	savable_state
struct	huff_entropy_decoder
Defines
#define	JPEG_INTERNALS
#define	HUFF_LOOKAHEAD   8 /* # of bits of lookahead */
#define	BIT_BUF_SIZE   32 /* size of buffer in bits */
#define	BITREAD_STATE_VARS
#define	BITREAD_LOAD_STATE(cinfop, permstate)
#define	BITREAD_SAVE_STATE(cinfop, permstate)
#define	CHECK_BIT_BUFFER(state, nbits, action)
#define	GET_BITS(nbits)   (((int) (get_buffer >> (bits_left -= (nbits)))) & BIT_MASK(nbits))
#define	PEEK_BITS(nbits)   (((int) (get_buffer >> (bits_left - (nbits)))) & BIT_MASK(nbits))
#define	DROP_BITS(nbits)   (bits_left -= (nbits))
#define	HUFF_DECODE(result, state, htbl, failaction, slowlabel)
#define	ASSIGN_STATE(dest, src)   ((dest) = (src))
#define	MIN_GET_BITS   (BIT_BUF_SIZE-7)
#define	BIT_MASK(nbits)   bmask[nbits]
#define	HUFF_EXTEND(x, s)   ((x) <= bmask[(s) - 1] ? (x) - bmask[s] : (x))
Typedefs
typedef INT32	bit_buf_type
typedef huff_entropy_decoder *	huff_entropy_ptr
Functions
	jpeg_make_d_derived_tbl (j_decompress_ptr cinfo, boolean isDC, int tblno, d_derived_tbl **pdtbl)
	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)
	process_restart (j_decompress_ptr cinfo)
	decode_mcu_DC_first (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
	decode_mcu_AC_first (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
	decode_mcu_DC_refine (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
	decode_mcu_AC_refine (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
	decode_mcu_sub (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
	decode_mcu (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
	start_pass_huff_decoder (j_decompress_ptr cinfo)
	jinit_huff_decoder (j_decompress_ptr cinfo)
Variables
static const int	jpeg_zigzag_order [8][8]
static const int	jpeg_zigzag_order7 [7][7]
static const int	jpeg_zigzag_order6 [6][6]
static const int	jpeg_zigzag_order5 [5][5]
static const int	jpeg_zigzag_order4 [4][4]
static const int	jpeg_zigzag_order3 [3][3]
static const int	jpeg_zigzag_order2 [2][2]
static const int	bmask [16]