jdphuff.c File Reference

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

Data Structures
struct	phuff_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

Typedefs
typedef phuff_entropy_decoder *	phuff_entropy_ptr

Functions
	decode_mcu_AC_first (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
	decode_mcu_AC_refine (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
	decode_mcu_DC_first (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
	decode_mcu_DC_refine (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
	jinit_phuff_decoder (j_decompress_ptr cinfo)
	METHODDEF (boolean)
	process_restart (j_decompress_ptr cinfo)

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

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

Referenced by decode_mcu_DC_first().

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

Referenced by decode_mcu_AC_first(), and decode_mcu_DC_first().

#define JPEG_INTERNALS

typedef phuff_entropy_decoder* phuff_entropy_ptr

decode_mcu_AC_first	(	j_decompress_ptr	cinfo,
		JBLOCKROW *	MCU_data
	)

References phuff_entropy_decoder::ac_derived_tbl, Al, BITREAD_LOAD_STATE, BITREAD_SAVE_STATE, BITREAD_STATE_VARS, phuff_entropy_decoder::bitstate, CHECK_BIT_BUFFER, savable_state::EOBRUN, FALSE, GET_BITS, HUFF_DECODE, HUFF_EXTEND, if(), jpeg_entropy_decoder::insufficient_data, jpeg_natural_order, process_restart(), phuff_entropy_decoder::pub, phuff_entropy_decoder::restarts_to_go, s, phuff_entropy_decoder::saved, Se, and TRUE.

Referenced by METHODDEF().

decode_mcu_AC_refine	(	j_decompress_ptr	cinfo,
		JBLOCKROW *	MCU_data
	)

References phuff_entropy_decoder::ac_derived_tbl, BITREAD_LOAD_STATE, BITREAD_SAVE_STATE, BITREAD_STATE_VARS, phuff_entropy_decoder::bitstate, CHECK_BIT_BUFFER, DCTSIZE2, savable_state::EOBRUN, FALSE, GET_BITS, HUFF_DECODE, jpeg_entropy_decoder::insufficient_data, jpeg_natural_order, process_restart(), phuff_entropy_decoder::pub, phuff_entropy_decoder::restarts_to_go, s, phuff_entropy_decoder::saved, Se, TRUE, and WARNMS.

Referenced by METHODDEF().

decode_mcu_DC_first	(	j_decompress_ptr	cinfo,
		JBLOCKROW *	MCU_data
	)

References Al, ASSIGN_STATE, BITREAD_LOAD_STATE, BITREAD_SAVE_STATE, BITREAD_STATE_VARS, phuff_entropy_decoder::bitstate, CHECK_BIT_BUFFER, ci, compptr, jpeg_component_info::dc_tbl_no, phuff_entropy_decoder::derived_tbls, FALSE, GET_BITS, HUFF_DECODE, HUFF_EXTEND, if(), jpeg_entropy_decoder::insufficient_data, process_restart(), phuff_entropy_decoder::pub, phuff_entropy_decoder::restarts_to_go, s, phuff_entropy_decoder::saved, state, and TRUE.

Referenced by METHODDEF().

decode_mcu_DC_refine	(	j_decompress_ptr	cinfo,
		JBLOCKROW *	MCU_data
	)

References BITREAD_LOAD_STATE, BITREAD_SAVE_STATE, BITREAD_STATE_VARS, phuff_entropy_decoder::bitstate, CHECK_BIT_BUFFER, FALSE, GET_BITS, if(), process_restart(), phuff_entropy_decoder::restarts_to_go, and TRUE.

Referenced by METHODDEF().

jinit_phuff_decoder

(

j_decompress_ptr

cinfo

)

References ci, DCTSIZE2, phuff_entropy_decoder::derived_tbls, i, JPOOL_IMAGE, NULL, NUM_HUFF_TBLS, phuff_entropy_decoder::pub, and SIZEOF.

Referenced by master_selection(), and transdecode_master_selection().

METHODDEF

(

boolean

)

References phuff_entropy_decoder::ac_derived_tbl, jpeg_component_info::ac_tbl_no, bitread_perm_state::bits_left, phuff_entropy_decoder::bitstate, ci, compptr, jpeg_component_info::dc_tbl_no, DCTSIZE2, decode_mcu_AC_first(), decode_mcu_AC_refine(), decode_mcu_DC_first(), decode_mcu_DC_refine(), phuff_entropy_decoder::derived_tbls, savable_state::EOBRUN, ERREXIT4, FALSE, bitread_perm_state::get_buffer, jpeg_entropy_decoder::insufficient_data, jpeg_make_d_derived_tbl(), savable_state::last_dc_val, phuff_entropy_decoder::pub, phuff_entropy_decoder::restarts_to_go, phuff_entropy_decoder::saved, Se, TRUE, and WARNMS2.

process_restart

(

j_decompress_ptr

cinfo

)

References bitread_perm_state::bits_left, phuff_entropy_decoder::bitstate, ci, cinfo, savable_state::EOBRUN, FALSE, if(), jpeg_entropy_decoder::insufficient_data, savable_state::last_dc_val, phuff_entropy_decoder::pub, phuff_entropy_decoder::restarts_to_go, phuff_entropy_decoder::saved, and TRUE.

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 }

const int extend_test[16]

static

Initial value:

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