jchuff.c File Reference

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

Go to the source code of this file.

Macros
#define	JPEG_INTERNALS
#define	ASSIGN_STATE(dest, src)   ((dest) = (src))
#define	emit_byte(state, val, action)
#define	MAX_CLEN   32 /* assumed maximum initial code length */

Typedefs
typedef huff_entropy_encoder *	huff_entropy_ptr

Functions
	METHODDEF (boolean)
	jpeg_make_c_derived_tbl (j_compress_ptr cinfo, boolean isDC, int tblno, c_derived_tbl **pdtbl)
	dump_buffer (working_state *state)
INLINE	emit_bits (working_state *state, unsigned int code, int size)
	flush_bits (working_state *state)
	encode_one_block (working_state *state, JCOEFPTR block, int last_dc_val, c_derived_tbl *dctbl, c_derived_tbl *actbl)
	emit_restart (working_state *state, int restart_num)
	encode_mcu_huff (j_compress_ptr cinfo, JBLOCKROW *MCU_data)
	finish_pass_huff (j_compress_ptr cinfo)
	htest_one_block (j_compress_ptr cinfo, JCOEFPTR block, int last_dc_val, long dc_counts[], long ac_counts[])
	encode_mcu_gather (j_compress_ptr cinfo, JBLOCKROW *MCU_data)
	jpeg_gen_optimal_table (j_compress_ptr cinfo, JHUFF_TBL *htbl, long freq[])
	finish_pass_gather (j_compress_ptr cinfo)
	jinit_huff_encoder (j_compress_ptr cinfo)

Macro Definition Documentation

ASSIGN_STATE

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

Definition at line 41 of file jchuff.c.

Referenced by encode_mcu_huff(), and finish_pass_huff().

emit_byte

#define emit_byte	(		state,
			val,
			action
	)

Value:

{ *(state)->next_output_byte++ = (JOCTET) (val);  \
      if (--(state)->free_in_buffer == 0)  \
        if (! dump_buffer(state))  \
          { action; } }

Definition at line 270 of file jchuff.c.

Referenced by emit_bits(), and emit_restart().

JPEG_INTERNALS

#define JPEG_INTERNALS

Definition at line 17 of file jchuff.c.

MAX_CLEN

#define MAX_CLEN   32 /* assumed maximum initial code length */

Referenced by jpeg_gen_optimal_table().

Typedef Documentation

huff_entropy_ptr

typedef huff_entropy_encoder* huff_entropy_ptr

Definition at line 74 of file jchuff.c.

Function Documentation

dump_buffer()

dump_buffer

(

working_state *

state

)

Definition at line 278 of file jchuff.c.

References FALSE, jpeg_destination_mgr::free_in_buffer, LOCAL, jpeg_destination_mgr::next_output_byte, and TRUE.

emit_bits()

INLINE emit_bits	(	working_state *	state,
		unsigned int	code,
		int	size
	)

Definition at line 302 of file jchuff.c.

References emit_byte, ERREXIT, FALSE, int, LOCAL, and TRUE.

Referenced by encode_one_block(), and flush_bits().

emit_restart()

emit_restart	(	working_state *	state,
		int	restart_num
	)

Definition at line 451 of file jchuff.c.

References emit_byte, FALSE, flush_bits(), JPEG_RST0, and TRUE.

Referenced by encode_mcu_huff().

encode_mcu_gather()

encode_mcu_gather	(	j_compress_ptr	cinfo,
		JBLOCKROW *	MCU_data
	)

Definition at line 645 of file jchuff.c.

References jpeg_component_info::ac_tbl_no, compptr, jpeg_component_info::dc_tbl_no, GLOBAL, htest_one_block(), if(), and TRUE.

encode_mcu_huff()

encode_mcu_huff	(	j_compress_ptr	cinfo,
		JBLOCKROW *	MCU_data
	)

Definition at line 476 of file jchuff.c.

References jpeg_component_info::ac_tbl_no, ASSIGN_STATE, compptr, jpeg_component_info::dc_tbl_no, emit_restart(), encode_one_block(), FALSE, METHODDEF(), and TRUE.

encode_one_block()

encode_one_block	(	working_state *	state,
		JCOEFPTR	block,
		int	last_dc_val,
		c_derived_tbl *	dctbl,
		c_derived_tbl *	actbl
	)

Definition at line 353 of file jchuff.c.

References DCTSIZE2, emit_bits(), ERREXIT, FALSE, i, jpeg_natural_order, LOCAL, MAX_COEF_BITS, nbits, and TRUE.

Referenced by encode_mcu_huff().

finish_pass_gather()

finish_pass_gather

(

j_compress_ptr

cinfo

)

Definition at line 846 of file jchuff.c.

References jpeg_component_info::ac_tbl_no, compptr, jpeg_component_info::dc_tbl_no, GLOBAL, jpeg_alloc_huff_table(), jpeg_gen_optimal_table(), MEMZERO, NULL, NUM_HUFF_TBLS, SIZEOF, and TRUE.

finish_pass_huff()

finish_pass_huff

(

j_compress_ptr

cinfo

)

Definition at line 533 of file jchuff.c.

References ASSIGN_STATE, ERREXIT, flush_bits(), and LOCAL.

flush_bits()

flush_bits

(

working_state *

state

)

Definition at line 340 of file jchuff.c.

References emit_bits(), FALSE, LOCAL, and TRUE.

Referenced by emit_restart(), and finish_pass_huff().

htest_one_block()

htest_one_block	(	j_compress_ptr	cinfo,
		JCOEFPTR	block,
		int	last_dc_val,
		long	dc_counts[],
		long	ac_counts[]
	)

Definition at line 572 of file jchuff.c.

References DCTSIZE2, ERREXIT, jpeg_natural_order, MAX_COEF_BITS, METHODDEF(), and nbits.

Referenced by encode_mcu_gather().

jinit_huff_encoder()

jinit_huff_encoder

(

j_compress_ptr

cinfo

)

Definition at line 891 of file jchuff.c.

References i, JPOOL_IMAGE, NULL, NUM_HUFF_TBLS, and SIZEOF.

Referenced by jinit_compress_master(), and transencode_master_selection().

jpeg_gen_optimal_table()

jpeg_gen_optimal_table	(	j_compress_ptr	cinfo,
		JHUFF_TBL *	htbl,
		long	freq[]
	)

Definition at line 705 of file jchuff.c.

References ERREXIT, FALSE, i, MAX_CLEN, MEMCOPY, MEMZERO, METHODDEF(), and SIZEOF.

Referenced by finish_pass_gather(), and finish_pass_gather_phuff().

jpeg_make_c_derived_tbl()

jpeg_make_c_derived_tbl	(	j_compress_ptr	cinfo,
		boolean	isDC,
		int	tblno,
		c_derived_tbl **	pdtbl
	)

Definition at line 179 of file jchuff.c.

References JHUFF_TBL::bits, code, c_derived_tbl::ehufco, c_derived_tbl::ehufsi, ERREXIT, ERREXIT1, htbl, JHUFF_TBL::huffval, i, if(), int, JPOOL_IMAGE, MEMZERO, NULL, NUM_HUFF_TBLS, pdtbl, SIZEOF, and tblno.

METHODDEF()

METHODDEF

(

boolean

)

Definition at line 89 of file jchuff.c.

Referenced by encode_mcu_huff(), htest_one_block(), and jpeg_gen_optimal_table().