jdmarker.c File Reference

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

Go to the source code of this file.

Macros
#define	JPEG_INTERNALS
#define	INPUT_VARS(cinfo)
#define	INPUT_SYNC(cinfo)
#define	INPUT_RELOAD(cinfo)
#define	MAKE_BYTE_AVAIL(cinfo, action)
#define	INPUT_BYTE(cinfo, V, action)
#define	INPUT_2BYTES(cinfo, V, action)
#define	get_dac(cinfo)   skip_variable(cinfo)
#define	APP0_DATA_LEN   14 /* Length of interesting data in APP0 */
#define	APP14_DATA_LEN   12 /* Length of interesting data in APP14 */
#define	APPN_DATA_LEN   14 /* Must be the largest of the above!! */

Typedefs
typedef my_marker_reader *	my_marker_ptr

Enumerations
enum	JPEG_MARKER {   M_SOF0 = 0xc0, M_SOF1 = 0xc1, M_SOF2 = 0xc2, M_SOF3 = 0xc3,   M_SOF5 = 0xc5, M_SOF6 = 0xc6, M_SOF7 = 0xc7, M_JPG = 0xc8,   M_SOF9 = 0xc9, M_SOF10 = 0xca, M_SOF11 = 0xcb, M_SOF13 = 0xcd,   M_SOF14 = 0xce, M_SOF15 = 0xcf, M_DHT = 0xc4, M_DAC = 0xcc,   M_RST0 = 0xd0, M_RST1 = 0xd1, M_RST2 = 0xd2, M_RST3 = 0xd3,   M_RST4 = 0xd4, M_RST5 = 0xd5, M_RST6 = 0xd6, M_RST7 = 0xd7,   M_SOI = 0xd8, M_EOI = 0xd9, M_SOS = 0xda, M_DQT = 0xdb,   M_DNL = 0xdc, M_DRI = 0xdd, M_DHP = 0xde, M_EXP = 0xdf,   M_APP0 = 0xe0, M_APP1 = 0xe1, M_APP2 = 0xe2, M_APP3 = 0xe3,   M_APP4 = 0xe4, M_APP5 = 0xe5, M_APP6 = 0xe6, M_APP7 = 0xe7,   M_APP8 = 0xe8, M_APP9 = 0xe9, M_APP10 = 0xea, M_APP11 = 0xeb,   M_APP12 = 0xec, M_APP13 = 0xed, M_APP14 = 0xee, M_APP15 = 0xef,   M_JPG0 = 0xf0, M_JPG13 = 0xfd, M_COM = 0xfe, M_TEM = 0x01,   M_ERROR = 0x100, M_SOF0 = 0xc0, M_SOF1 = 0xc1, M_SOF2 = 0xc2,   M_SOF3 = 0xc3, M_SOF5 = 0xc5, M_SOF6 = 0xc6, M_SOF7 = 0xc7,   M_JPG = 0xc8, M_SOF9 = 0xc9, M_SOF10 = 0xca, M_SOF11 = 0xcb,   M_SOF13 = 0xcd, M_SOF14 = 0xce, M_SOF15 = 0xcf, M_DHT = 0xc4,   M_DAC = 0xcc, M_RST0 = 0xd0, M_RST1 = 0xd1, M_RST2 = 0xd2,   M_RST3 = 0xd3, M_RST4 = 0xd4, M_RST5 = 0xd5, M_RST6 = 0xd6,   M_RST7 = 0xd7, M_SOI = 0xd8, M_EOI = 0xd9, M_SOS = 0xda,   M_DQT = 0xdb, M_DNL = 0xdc, M_DRI = 0xdd, M_DHP = 0xde,   M_EXP = 0xdf, M_APP0 = 0xe0, M_APP1 = 0xe1, M_APP2 = 0xe2,   M_APP3 = 0xe3, M_APP4 = 0xe4, M_APP5 = 0xe5, M_APP6 = 0xe6,   M_APP7 = 0xe7, M_APP8 = 0xe8, M_APP9 = 0xe9, M_APP10 = 0xea,   M_APP11 = 0xeb, M_APP12 = 0xec, M_APP13 = 0xed, M_APP14 = 0xee,   M_APP15 = 0xef, M_JPG0 = 0xf0, M_JPG13 = 0xfd, M_COM = 0xfe,   M_TEM = 0x01, M_ERROR = 0x100 }

Functions
	get_soi (j_decompress_ptr cinfo)
	get_sof (j_decompress_ptr cinfo, boolean is_prog, boolean is_arith)
	get_sos (j_decompress_ptr cinfo)
	get_dht (j_decompress_ptr cinfo)
	get_dqt (j_decompress_ptr cinfo)
	get_dri (j_decompress_ptr cinfo)
	examine_app0 (j_decompress_ptr cinfo, JOCTET FAR *data, unsigned int datalen, INT32 remaining)
	examine_app14 (j_decompress_ptr cinfo, JOCTET FAR *data, unsigned int datalen, INT32 remaining)
	get_interesting_appn (j_decompress_ptr cinfo)
	save_marker (j_decompress_ptr cinfo)
	skip_variable (j_decompress_ptr cinfo)
	next_marker (j_decompress_ptr cinfo)
	first_marker (j_decompress_ptr cinfo)
	read_markers (j_decompress_ptr cinfo)
	read_restart_marker (j_decompress_ptr cinfo)
	jpeg_resync_to_restart (j_decompress_ptr cinfo, int desired)
	reset_marker_reader (j_decompress_ptr cinfo)
	jinit_marker_reader (j_decompress_ptr cinfo)
	jpeg_save_markers (j_decompress_ptr cinfo, int marker_code, unsigned int length_limit)
	jpeg_set_marker_processor (j_decompress_ptr cinfo, int marker_code, jpeg_marker_parser_method routine)

Macro Definition Documentation

APP0_DATA_LEN

#define APP0_DATA_LEN   14 /* Length of interesting data in APP0 */

Definition at line 578 of file jdmarker.c.

Referenced by examine_app0(), and jpeg_save_markers().

APP14_DATA_LEN

#define APP14_DATA_LEN   12 /* Length of interesting data in APP14 */

Definition at line 579 of file jdmarker.c.

Referenced by examine_app14(), and jpeg_save_markers().

APPN_DATA_LEN

#define APPN_DATA_LEN   14 /* Must be the largest of the above!! */

Definition at line 580 of file jdmarker.c.

Referenced by get_interesting_appn().

get_dac

#define get_dac

(

cinfo

)

skip_variable(cinfo)

Definition at line 413 of file jdmarker.c.

Referenced by get_sos(), and read_markers().

INPUT_2BYTES

#define INPUT_2BYTES	(		cinfo,
			V,
			action
	)

Value:

MAKESTMT( MAKE_BYTE_AVAIL(cinfo,action); \
          bytes_in_buffer--; \
          V = ((unsigned int) GETJOCTET(*next_input_byte++)) << 8; \
          MAKE_BYTE_AVAIL(cinfo,action); \
          bytes_in_buffer--; \
          V += GETJOCTET(*next_input_byte++); )

Definition at line 156 of file jdmarker.c.

Referenced by get_dht(), get_dqt(), get_dri(), get_interesting_appn(), get_sof(), get_sos(), save_marker(), and skip_variable().

INPUT_BYTE

#define INPUT_BYTE	(		cinfo,
			V,
			action
	)

Value:

MAKESTMT( MAKE_BYTE_AVAIL(cinfo,action); \
          bytes_in_buffer--; \
          V = GETJOCTET(*next_input_byte++); )

Definition at line 148 of file jdmarker.c.

Referenced by first_marker(), get_dht(), get_dqt(), get_interesting_appn(), get_sof(), get_sos(), and next_marker().

INPUT_RELOAD

#define INPUT_RELOAD

(

cinfo

)

Value:

( next_input_byte = datasrc->next_input_byte,  \
      bytes_in_buffer = datasrc->bytes_in_buffer )

Definition at line 130 of file jdmarker.c.

INPUT_SYNC

#define INPUT_SYNC

(

cinfo

)

Value:

( datasrc->next_input_byte = next_input_byte,  \
      datasrc->bytes_in_buffer = bytes_in_buffer )

Definition at line 125 of file jdmarker.c.

Referenced by first_marker(), get_dht(), get_dqt(), get_dri(), get_interesting_appn(), get_sof(), get_sos(), next_marker(), save_marker(), and skip_variable().

INPUT_VARS

#define INPUT_VARS

(

cinfo

)

Value:

struct jpeg_source_mgr * datasrc = (cinfo)->src;  \
    const JOCTET * next_input_byte = datasrc->next_input_byte;  \
    size_t bytes_in_buffer = datasrc->bytes_in_buffer

Definition at line 119 of file jdmarker.c.

Referenced by first_marker(), get_dht(), get_dqt(), get_dri(), get_interesting_appn(), get_sof(), get_sos(), next_marker(), save_marker(), and skip_variable().

JPEG_INTERNALS

#define JPEG_INTERNALS

Definition at line 15 of file jdmarker.c.

MAKE_BYTE_AVAIL

#define MAKE_BYTE_AVAIL	(		cinfo,
			action
	)

Value:

if (bytes_in_buffer == 0) {  \
      if (! (*datasrc->fill_input_buffer) (cinfo))  \
        { action; }  \
      INPUT_RELOAD(cinfo);  \
    }

Definition at line 138 of file jdmarker.c.

Referenced by save_marker().

Typedef Documentation

my_marker_ptr

typedef my_marker_reader* my_marker_ptr

Definition at line 107 of file jdmarker.c.

Enumeration Type Documentation

JPEG_MARKER

enum JPEG_MARKER

Enumerator
M_SOF0
M_SOF1
M_SOF2
M_SOF3
M_SOF5
M_SOF6
M_SOF7
M_JPG
M_SOF9
M_SOF10
M_SOF11
M_SOF13
M_SOF14
M_SOF15
M_DHT
M_DAC
M_RST0
M_RST1
M_RST2
M_RST3
M_RST4
M_RST5
M_RST6
M_RST7
M_SOI
M_EOI
M_SOS
M_DQT
M_DNL
M_DRI
M_DHP
M_EXP
M_APP0
M_APP1
M_APP2
M_APP3
M_APP4
M_APP5
M_APP6
M_APP7
M_APP8
M_APP9
M_APP10
M_APP11
M_APP12
M_APP13
M_APP14
M_APP15
M_JPG0
M_JPG13
M_COM
M_TEM
M_ERROR
M_SOF0
M_SOF1
M_SOF2
M_SOF3
M_SOF5
M_SOF6
M_SOF7
M_JPG
M_SOF9
M_SOF10
M_SOF11
M_SOF13
M_SOF14
M_SOF15
M_DHT
M_DAC
M_RST0
M_RST1
M_RST2
M_RST3
M_RST4
M_RST5
M_RST6
M_RST7
M_SOI
M_EOI
M_SOS
M_DQT
M_DNL
M_DRI
M_DHP
M_EXP
M_APP0
M_APP1
M_APP2
M_APP3
M_APP4
M_APP5
M_APP6
M_APP7
M_APP8
M_APP9
M_APP10
M_APP11
M_APP12
M_APP13
M_APP14
M_APP15
M_JPG0
M_JPG13
M_COM
M_TEM
M_ERROR

Definition at line 20 of file jdmarker.c.

Function Documentation

examine_app0()

examine_app0	(	j_decompress_ptr	cinfo,
		JOCTET FAR *	data,
		unsigned int	datalen,
		INT32	remaining
	)

Definition at line 584 of file jdmarker.c.

References APP0_DATA_LEN, GETJOCTET, LOCAL, TRACEMS1, TRACEMS2, TRACEMS5, TRUE, and WARNMS2.

Referenced by get_interesting_appn(), and save_marker().

examine_app14()

examine_app14	(	j_decompress_ptr	cinfo,
		JOCTET FAR *	data,
		unsigned int	datalen,
		INT32	remaining
	)

Definition at line 660 of file jdmarker.c.

References jpeg_decompress_struct::Adobe_transform, APP14_DATA_LEN, datalen, GETJOCTET, METHODDEF, jpeg_decompress_struct::saw_Adobe_marker, TRACEMS1, TRACEMS4, TRUE, and version.

Referenced by get_interesting_appn(), and save_marker().

first_marker()

first_marker

(

j_decompress_ptr

cinfo

)

Definition at line 921 of file jdmarker.c.

References ERREXIT2, FALSE, INPUT_BYTE, INPUT_SYNC, INPUT_VARS, M_SOI, METHODDEF, TRUE, and jpeg_decompress_struct::unread_marker.

Referenced by read_markers().

get_dht()

get_dht

(

j_decompress_ptr

cinfo

)

Definition at line 419 of file jdmarker.c.

References ERREXIT, ERREXIT1, FALSE, i, INPUT_2BYTES, INPUT_BYTE, INPUT_SYNC, INPUT_VARS, jpeg_alloc_huff_table(), LOCAL, MEMCOPY, NULL, NUM_HUFF_TBLS, SIZEOF, TRACEMS1, TRACEMS8, and TRUE.

Referenced by read_markers().

get_dqt()

get_dqt

(

j_decompress_ptr

cinfo

)

Definition at line 490 of file jdmarker.c.

References DCTSIZE2, ERREXIT, ERREXIT1, FALSE, i, INPUT_2BYTES, INPUT_BYTE, INPUT_SYNC, INPUT_VARS, jpeg_alloc_quant_table(), jpeg_natural_order, LOCAL, NULL, NUM_QUANT_TBLS, jpeg_decompress_struct::quant_tbl_ptrs, JQUANT_TBL::quantval, TRACEMS2, TRACEMS8, and TRUE.

Referenced by read_markers().

get_dri()

get_dri

(

j_decompress_ptr

cinfo

)

Definition at line 548 of file jdmarker.c.

References ERREXIT, FALSE, INPUT_2BYTES, INPUT_SYNC, INPUT_VARS, jpeg_decompress_struct::restart_interval, TRACEMS1, and TRUE.

Referenced by read_markers().

get_interesting_appn()

get_interesting_appn

(

j_decompress_ptr

cinfo

)

Definition at line 691 of file jdmarker.c.

References APPN_DATA_LEN, ERREXIT1, examine_app0(), examine_app14(), FALSE, FAR, i, INPUT_2BYTES, INPUT_BYTE, INPUT_SYNC, INPUT_VARS, int, M_APP0, M_APP14, METHODDEF, jpeg_decompress_struct::src, TRUE, and jpeg_decompress_struct::unread_marker.

Referenced by jinit_marker_reader(), and jpeg_save_markers().

get_sof()

get_sof	(	j_decompress_ptr	cinfo,
		boolean	is_prog,
		boolean	is_arith
	)

Definition at line 237 of file jdmarker.c.

References jpeg_component_info::component_id, jpeg_component_info::component_index, compptr, ERREXIT, FALSE, jpeg_component_info::h_samp_factor, INPUT_2BYTES, INPUT_BYTE, INPUT_SYNC, INPUT_VARS, JPOOL_IMAGE, LOCAL, NULL, jpeg_component_info::quant_tbl_no, SIZEOF, TRACEMS4, TRUE, and jpeg_component_info::v_samp_factor.

Referenced by read_markers().

get_soi()

get_soi

(

j_decompress_ptr

cinfo

)

Definition at line 197 of file jdmarker.c.

References ERREXIT, FALSE, i, JCS_UNKNOWN, LOCAL, NUM_ARITH_TBLS, TRACEMS, and TRUE.

Referenced by read_markers().

get_sos()

get_sos

(

j_decompress_ptr

cinfo

)

Definition at line 301 of file jdmarker.c.

References jpeg_component_info::ac_tbl_no, jpeg_decompress_struct::arith_ac_K, jpeg_decompress_struct::arith_dc_L, jpeg_decompress_struct::arith_dc_U, jpeg_component_info::component_id, compptr, jpeg_component_info::dc_tbl_no, ERREXIT, ERREXIT1, FALSE, get_dac, i, INPUT_2BYTES, INPUT_BYTE, INPUT_SYNC, INPUT_VARS, LOCAL, MAX_COMPS_IN_SCAN, NUM_ARITH_TBLS, TRACEMS1, TRACEMS2, TRACEMS3, TRACEMS4, and TRUE.

Referenced by read_markers().

jinit_marker_reader()

jinit_marker_reader

(

j_decompress_ptr

cinfo

)

Definition at line 1262 of file jdmarker.c.

References get_interesting_appn(), GLOBAL, i, JPOOL_PERMANENT, marker, read_markers(), read_restart_marker(), reset_marker_reader(), SIZEOF, and skip_variable().

Referenced by jpeg_CreateDecompress().

jpeg_resync_to_restart()

jpeg_resync_to_restart	(	j_decompress_ptr	cinfo,
		int	desired
	)

Definition at line 1192 of file jdmarker.c.

References desired, FALSE, M_RST0, M_RST7, M_SOF0, marker, METHODDEF, next_marker(), TRACEMS2, TRUE, jpeg_decompress_struct::unread_marker, and WARNMS2.

Referenced by jpeg_stdio_src().

jpeg_save_markers()

jpeg_save_markers	(	j_decompress_ptr	cinfo,
		int	marker_code,
		unsigned int	length_limit
	)

Definition at line 1300 of file jdmarker.c.

References APP0_DATA_LEN, APP14_DATA_LEN, ERREXIT1, get_interesting_appn(), GLOBAL, int, length_limit, M_APP0, M_APP14, M_APP15, M_COM, jpeg_decompress_struct::marker, marker, marker_code, save_marker(), SIZEOF, and skip_variable().

Referenced by jcopy_markers_setup().

jpeg_set_marker_processor()

jpeg_set_marker_processor	(	j_decompress_ptr	cinfo,
		int	marker_code,
		jpeg_marker_parser_method	routine
	)

Definition at line 1349 of file jdmarker.c.

References ERREXIT1, if(), int, M_APP0, M_APP15, M_COM, jpeg_decompress_struct::marker, marker, marker_code, and routine.

next_marker()

next_marker

(

j_decompress_ptr

cinfo

)

Definition at line 874 of file jdmarker.c.

References jpeg_marker_reader::discarded_bytes, FALSE, INPUT_BYTE, INPUT_SYNC, INPUT_VARS, LOCAL, jpeg_decompress_struct::marker, TRUE, jpeg_decompress_struct::unread_marker, and WARNMS2.

Referenced by jpeg_resync_to_restart(), read_markers(), and read_restart_marker().

read_markers()

read_markers

(

j_decompress_ptr

cinfo

)

Definition at line 952 of file jdmarker.c.

References ERREXIT1, FALSE, first_marker(), get_dac, get_dht(), get_dqt(), get_dri(), get_sof(), get_soi(), get_sos(), JPEG_REACHED_EOI, JPEG_REACHED_SOS, JPEG_SUSPENDED, M_APP0, M_APP1, M_APP10, M_APP11, M_APP12, M_APP13, M_APP14, M_APP15, M_APP2, M_APP3, M_APP4, M_APP5, M_APP6, M_APP7, M_APP8, M_APP9, M_COM, M_DAC, M_DHT, M_DNL, M_DQT, M_DRI, M_EOI, M_JPG, M_RST0, M_RST1, M_RST2, M_RST3, M_RST4, M_RST5, M_RST6, M_RST7, M_SOF0, M_SOF1, M_SOF10, M_SOF11, M_SOF13, M_SOF14, M_SOF15, M_SOF2, M_SOF3, M_SOF5, M_SOF6, M_SOF7, M_SOF9, M_SOI, M_SOS, M_TEM, jpeg_decompress_struct::marker, METHODDEF, next_marker(), jpeg_marker_reader::saw_SOI, skip_variable(), TRACEMS, TRACEMS1, TRUE, and jpeg_decompress_struct::unread_marker.

Referenced by jinit_marker_reader().

read_restart_marker()

read_restart_marker

(

j_decompress_ptr

cinfo

)

Definition at line 1113 of file jdmarker.c.

References FALSE, GLOBAL, M_RST0, jpeg_decompress_struct::marker, next_marker(), jpeg_marker_reader::next_restart_num, jpeg_decompress_struct::src, TRACEMS1, TRUE, and jpeg_decompress_struct::unread_marker.

Referenced by jinit_marker_reader().

reset_marker_reader()

reset_marker_reader

(

j_decompress_ptr

cinfo

)

Definition at line 1242 of file jdmarker.c.

References jpeg_decompress_struct::comp_info, FALSE, jpeg_decompress_struct::input_scan_number, jpeg_decompress_struct::marker, marker, NULL, and jpeg_decompress_struct::unread_marker.

Referenced by jinit_marker_reader().

save_marker()

save_marker

(

j_decompress_ptr

cinfo

)

Definition at line 739 of file jdmarker.c.

References examine_app0(), examine_app14(), FALSE, FAR, INPUT_2BYTES, INPUT_SYNC, INPUT_VARS, int, JPOOL_IMAGE, M_APP0, M_APP14, M_COM, MAKE_BYTE_AVAIL, jpeg_decompress_struct::marker, marker, jpeg_decompress_struct::marker_list, METHODDEF, NULL, SIZEOF, jpeg_decompress_struct::src, TRACEMS2, TRUE, and jpeg_decompress_struct::unread_marker.

Referenced by jpeg_save_markers().

skip_variable()

skip_variable

(

j_decompress_ptr

cinfo

)

Definition at line 845 of file jdmarker.c.

References FALSE, INPUT_2BYTES, INPUT_SYNC, INPUT_VARS, LOCAL, jpeg_decompress_struct::src, TRACEMS2, TRUE, and jpeg_decompress_struct::unread_marker.

Referenced by jinit_marker_reader(), jpeg_save_markers(), and read_markers().