#include <string.h>
#include "jpeg.h"

Include dependency graph for jpeg.c:

Data Structures
struct	in

union	hufftblp

struct	scan

struct	dec_hufftbl

struct	comp

struct	jpginfo

Macros
#define	__LITTLE_ENDIAN

#define	ISHIFT 11

#define	IFIX(a) ((int)((a) * (1 << ISHIFT) + .5))

#define	IMULT(a, b) (((a) * (b)) >> ISHIFT)

#define	ITOINT(a) ((a) >> ISHIFT)

#define	__P(x) x

#define	M_BADHUFF -1

#define	M_EOF 0x80

#define	DECBITS 10 /* seems to be the optimum */

#define	PREC int

#define	M_SOI 0xd8

#define	M_APP0 0xe0

#define	M_DQT 0xdb

#define	M_SOF0 0xc0

#define	M_DHT 0xc4

#define	M_DRI 0xdd

#define	M_SOS 0xda

#define	M_RST0 0xd0

#define	M_EOI 0xd9

#define	M_COM 0xfe

#define	MAXCOMP 4

#define	dec_huffdc (dhuff + 0)

#define	dec_huffac (dhuff + 2)

#define	LEBI_DCL int le, bi

#define	LEBI_GET(in) (le = in->left, bi = in->bits)

#define	LEBI_PUT(in) (in->left = le, in->bits = bi)

#define	GETBITS(in, n)

#define	UNGETBITS(in, n)

#define	DEC_REC(in, hu, r, i)

#define	ONE ((PREC)IFIX(1.))

#define	S2 ((PREC)IFIX(0.382683432))

#define	C2 ((PREC)IFIX(0.923879532))

#define	C4 ((PREC)IFIX(0.707106781))

#define	S22 ((PREC)IFIX(2 * 0.382683432))

#define	C22 ((PREC)IFIX(2 * 0.923879532))

#define	IC4 ((PREC)IFIX(1 / 0.707106781))

#define	C3IC1 ((PREC)IFIX(0.847759065)) /* c3/c1 */

#define	C5IC1 ((PREC)IFIX(0.566454497)) /* c5/c1 */

#define	C7IC1 ((PREC)IFIX(0.198912367)) /* c7/c1 */

#define	XPP(a, b) (t = a + b, b = a - b, a = t)

#define	XMP(a, b) (t = a - b, b = a + b, a = t)

#define	XPM(a, b) (t = a + b, b = b - a, a = t)

#define	ROT(a, b, s, c)

#define	IDCT

#define	ROUND

#define	STORECLAMP(a, x)

#define	CLAMP(x) ((unsigned int)(x) >= 256 ? ((x) < 0 ? 0 : 255) : (x))

#define	CBCRCG(yin, xin)

#define	PIC(yin, xin, p, xout)

#define	PIC_16(yin, xin, p, xout, add)

#define	PIC_32(yin, xin, p, xout)

#define	PIC221111(xin)

#define	PIC221111_16(xin)

#define	PIC221111_32(xin)

Functions
static void decode_mcus	__P ((struct in , int , int, struct scan , int ))

static int dec_readmarker	__P ((struct in *))

static void dec_makehuff	__P ((struct dec_hufftbl , int , unsigned char *))

static void setinput	__P ((struct in , unsigned char ))

static void idctqtab	__P ((unsigned char , PREC ))

static void idct	__P ((int , int , PREC *, PREC, int))

static void scaleidctqtab	__P ((PREC *, PREC))

static void initcol	__P ((PREC[][64]))

static void col221111	__P ((int , unsigned char , int))

static int	getbyte (void)

static int	getword (void)

static int	readtables (int till)

static void	dec_initscans (void)

static int	dec_checkmarker (void)

void	jpeg_fetch_size (unsigned char buf, int width, int *height)

int	jpeg_check_size (unsigned char *buf, int width, int height)

int	jpeg_decode (unsigned char buf, unsigned char pic, int width, int height, int depth, struct jpeg_decdata *decdata)

static int fillbits	__P ((struct in *, int, unsigned int))

static int dec_rec2	__P ((struct in , struct dec_hufftbl , int *, int, int))

static void	setinput (struct in in, unsigned char p)

static int	fillbits (struct in *in, int le, unsigned int bi)

static int	dec_readmarker (struct in *in)

static int	dec_rec2 (struct in in, struct dec_hufftbl hu, int *runp, int c, int i)

static void	decode_mcus (struct in in, int dct, int n, struct scan sc, int maxp)

static void	dec_makehuff (struct dec_hufftbl hu, int hufflen, unsigned char *huffvals)

void	idct (int in, int out, PREC *lquant, PREC off, int max)

static void	idctqtab (unsigned char qin, PREC qout)

static void	scaleidctqtab (PREC *q, PREC sc)

static void	initcol (PREC q[][64])

static void	col221111 (int out, unsigned char pic, int width)

static void	col221111_16 (int out, unsigned char pic, int width)

static void	col221111_32 (int out, unsigned char pic, int width)

Variables
static unsigned char *	datap

static struct jpginfo	info

static struct comp	comps [MAXCOMP]

static struct scan	dscans [MAXCOMP]

static unsigned char	quant [4][64]

static struct dec_hufftbl	dhuff [4]

static struct in	glob_in

static unsigned char	zig2 [64]

static unsigned char	zig [64]

static PREC	aaidct [8]

Macro Definition Documentation

◆ __LITTLE_ENDIAN

#define __LITTLE_ENDIAN

Definition at line 10 of file jpeg.c.

◆ __P

#define __P ( x ) x

Definition at line 20 of file jpeg.c.

◆ C2

#define C2 ((PREC)IFIX(0.923879532))

Definition at line 632 of file jpeg.c.

◆ C22

#define C22 ((PREC)IFIX(2 * 0.923879532))

Definition at line 636 of file jpeg.c.

◆ C3IC1

#define C3IC1 ((PREC)IFIX(0.847759065)) /* c3/c1 */

Definition at line 639 of file jpeg.c.

◆ C4

#define C4 ((PREC)IFIX(0.707106781))

Definition at line 633 of file jpeg.c.

◆ C5IC1

#define C5IC1 ((PREC)IFIX(0.566454497)) /* c5/c1 */

Definition at line 640 of file jpeg.c.

◆ C7IC1

#define C7IC1 ((PREC)IFIX(0.198912367)) /* c7/c1 */

Definition at line 641 of file jpeg.c.

◆ CBCRCG

#define CBCRCG	(	yin,
		xin
	)

Value:

(                                               \
        cb = outc[0  + yin * 8 + xin],          \
        cr = outc[64 + yin * 8 + xin],          \
        cg = (50 * cb + 130 * cr + 128) >> 8    \
)

Definition at line 833 of file jpeg.c.

◆ CLAMP

#define CLAMP ( x ) ((unsigned int)(x) >= 256 ? ((x) < 0 ? 0 : 255) : (x))

Definition at line 829 of file jpeg.c.

◆ dec_huffac

#define dec_huffac (dhuff + 2)

Definition at line 144 of file jpeg.c.

◆ dec_huffdc

#define dec_huffdc (dhuff + 0)

Definition at line 143 of file jpeg.c.

◆ DEC_REC

#define DEC_REC	(	in,
		hu,
		r,
		i
	)

Value:

        (               \
        r = GETBITS(in, DECBITS),               \
        i = hu->llvals[r],                      \
        i & 128 ?                               \
        (                                       \
                UNGETBITS(in, i & 127),         \
                r = i >> 8 & 15,                \
                i >> 16                         \
        )                                       \
        :                                       \
        (                                       \
                LEBI_PUT(in),                   \
                i = dec_rec2(in, hu, &r, r, i), \
                LEBI_GET(in),                   \
                i                               \
        )                                       \
)

Definition at line 524 of file jpeg.c.

◆ DECBITS

#define DECBITS 10 /* seems to be the optimum */

Definition at line 60 of file jpeg.c.

◆ GETBITS

#define GETBITS	(	in,
		n
	)

Value:

        (                                               \
        (le < (n) ? le = fillbits(in, le, bi), bi = in->bits : 0),      \
        (le -= (n)),                                                    \
        bi >> le & ((1 << (n)) - 1)                                     \
        )

Definition at line 479 of file jpeg.c.

◆ IC4

#define IC4 ((PREC)IFIX(1 / 0.707106781))

Definition at line 637 of file jpeg.c.

◆ IDCT

#define IDCT

Value:

(                                       \
        XPP(t0, t1),                    \
        XMP(t2, t3),                    \
        t2 = IMULT(t2, IC4) - t3,       \
        XPP(t0, t3),                    \
        XPP(t1, t2),                    \
        XMP(t4, t7),                    \
        XPP(t5, t6),                    \
        XMP(t5, t7),                    \
        t5 = IMULT(t5, IC4),            \
        ROT(t4, t6, S22, C22),          \
        t6 -= t7,                       \
        t5 -= t6,                       \
        t4 -= t5,                       \
        XPP(t0, t7),                    \
        XPP(t1, t6),                    \
        XPP(t2, t5),                    \
        XPP(t3, t4)                     \
)

Definition at line 651 of file jpeg.c.

◆ IFIX

#define IFIX ( a ) ((int)((a) * (1 << ISHIFT) + .5))

Definition at line 15 of file jpeg.c.

◆ IMULT

#define IMULT	(	a,
		b
	)	(((a) * (b)) >> ISHIFT)

Definition at line 16 of file jpeg.c.

◆ ISHIFT

#define ISHIFT 11

Definition at line 13 of file jpeg.c.

◆ ITOINT

#define ITOINT ( a ) ((a) >> ISHIFT)

Definition at line 17 of file jpeg.c.

◆ LEBI_DCL

#define LEBI_DCL int le, bi

Definition at line 475 of file jpeg.c.

◆ LEBI_GET

#define LEBI_GET ( in ) (le = in->left, bi = in->bits)

Definition at line 476 of file jpeg.c.

◆ LEBI_PUT

#define LEBI_PUT ( in ) (in->left = le, in->bits = bi)

Definition at line 477 of file jpeg.c.

◆ M_APP0

#define M_APP0 0xe0

Definition at line 94 of file jpeg.c.

◆ M_BADHUFF

#define M_BADHUFF -1

Definition at line 24 of file jpeg.c.

◆ M_COM

#define M_COM 0xfe

Definition at line 102 of file jpeg.c.

◆ M_DHT

#define M_DHT 0xc4

Definition at line 97 of file jpeg.c.

◆ M_DQT

#define M_DQT 0xdb

Definition at line 95 of file jpeg.c.

◆ M_DRI

#define M_DRI 0xdd

Definition at line 98 of file jpeg.c.

◆ M_EOF

#define M_EOF 0x80

Definition at line 25 of file jpeg.c.

◆ M_EOI

#define M_EOI 0xd9

Definition at line 101 of file jpeg.c.

◆ M_RST0

#define M_RST0 0xd0

Definition at line 100 of file jpeg.c.

◆ M_SOF0

#define M_SOF0 0xc0

Definition at line 96 of file jpeg.c.

◆ M_SOI

#define M_SOI 0xd8

Definition at line 93 of file jpeg.c.

◆ M_SOS

#define M_SOS 0xda

Definition at line 99 of file jpeg.c.

◆ MAXCOMP

#define MAXCOMP 4

Definition at line 125 of file jpeg.c.

◆ ONE

#define ONE ((PREC)IFIX(1.))

Definition at line 630 of file jpeg.c.

◆ PIC

#define PIC	(	yin,
		xin,
		p,
		xout
	)

Value:

(                                               \
        y = outy[(yin) * 8 + xin],              \
        STORECLAMP(p[(xout) * 3 + 0], y + cr),  \
        STORECLAMP(p[(xout) * 3 + 1], y - cg),  \
        STORECLAMP(p[(xout) * 3 + 2], y + cb)   \
)

Definition at line 851 of file jpeg.c.

◆ PIC221111

#define PIC221111 ( xin )

Value:

(                                                                       \
        CBCRCG(0, xin),                                                 \
        PIC(xin / 4 * 8 + 0, (xin & 3) * 2 + 0, pic0, xin * 2 + 0),     \
        PIC(xin / 4 * 8 + 0, (xin & 3) * 2 + 1, pic0, xin * 2 + 1),     \
        PIC(xin / 4 * 8 + 1, (xin & 3) * 2 + 0, pic1, xin * 2 + 0),     \
        PIC(xin / 4 * 8 + 1, (xin & 3) * 2 + 1, pic1, xin * 2 + 1)      \
)

Definition at line 902 of file jpeg.c.

◆ PIC221111_16

#define PIC221111_16 ( xin )

Value:

(                                                                              \
        CBCRCG(0, xin),                                                        \
        PIC_16(xin / 4 * 8 + 0, (xin & 3) * 2 + 0, pic0, xin * 2 + 0, 3),      \
        PIC_16(xin / 4 * 8 + 0, (xin & 3) * 2 + 1, pic0, xin * 2 + 1, 0),      \
        PIC_16(xin / 4 * 8 + 1, (xin & 3) * 2 + 0, pic1, xin * 2 + 0, 1),      \
        PIC_16(xin / 4 * 8 + 1, (xin & 3) * 2 + 1, pic1, xin * 2 + 1, 2)       \
)

Definition at line 911 of file jpeg.c.

◆ PIC221111_32

#define PIC221111_32 ( xin )

Value:

(                                                                       \
        CBCRCG(0, xin),                                                 \
        PIC_32(xin / 4 * 8 + 0, (xin & 3) * 2 + 0, pic0, xin * 2 + 0),  \
        PIC_32(xin / 4 * 8 + 0, (xin & 3) * 2 + 1, pic0, xin * 2 + 1),  \
        PIC_32(xin / 4 * 8 + 1, (xin & 3) * 2 + 0, pic1, xin * 2 + 0),  \
        PIC_32(xin / 4 * 8 + 1, (xin & 3) * 2 + 1, pic1, xin * 2 + 1)   \
)

Definition at line 920 of file jpeg.c.

◆ PIC_16

#define PIC_16	(	yin,
		xin,
		p,
		xout,
		add
	)

Value:

(                                                               \
        y = outy[(yin) * 8 + xin],                              \
        y = ((CLAMP(y + cr + add*2+1) & 0xf8) <<  8) |          \
                ((CLAMP(y - cg + add)     & 0xfc) <<  3) |      \
                ((CLAMP(y + cb + add*2+1))        >>  3),       \
        p[(xout) * 2 + 0] = y & 0xff,                           \
        p[(xout) * 2 + 1] = y >> 8                              \
)

Definition at line 860 of file jpeg.c.

◆ PIC_32

#define PIC_32	(	yin,
		xin,
		p,
		xout
	)

Value:

(                                               \
        y = outy[(yin) * 8 + xin],              \
        STORECLAMP(p[(xout) * 4 + 0], y + cr),  \
        STORECLAMP(p[(xout) * 4 + 1], y - cg),  \
        STORECLAMP(p[(xout) * 4 + 2], y + cb),  \
        p[(xout) * 4 + 3] = 0                   \
)

Definition at line 893 of file jpeg.c.

◆ PREC

#define PREC int

Definition at line 77 of file jpeg.c.

◆ ROT

#define ROT	(	a,
		b,
		s,
		c
	)

Value:

                        (t = IMULT(a + b, s),   \
                        a = IMULT(a, c - s) + t,        \
                        b = IMULT(b, c + s) - t)

Definition at line 647 of file jpeg.c.

◆ ROUND

#define ROUND

Definition at line 790 of file jpeg.c.

◆ S2

#define S2 ((PREC)IFIX(0.382683432))

Definition at line 631 of file jpeg.c.

◆ S22

#define S22 ((PREC)IFIX(2 * 0.382683432))

Definition at line 635 of file jpeg.c.

◆ STORECLAMP

#define STORECLAMP	(	a,
		x
	)

Value:

(                                               \
        (a) = (x),                              \
        (unsigned int)(x) >= 256 ?              \
        ((a) = (x) < 0 ? 0 : 255)               \
        :                                       \
        0                                       \
)

Definition at line 820 of file jpeg.c.

◆ UNGETBITS

#define UNGETBITS	(	in,
		n
	)

Value:

        (       \
        le += (n)                       \
)

Definition at line 485 of file jpeg.c.

◆ XMP

#define XMP	(	a,
		b
	)	(t = a - b, b = a + b, a = t)

Definition at line 644 of file jpeg.c.

◆ XPM

#define XPM	(	a,
		b
	)	(t = a + b, b = b - a, a = t)

Definition at line 645 of file jpeg.c.

◆ XPP

#define XPP	(	a,
		b
	)	(t = a + b, b = a - b, a = t)

Definition at line 643 of file jpeg.c.

Function Documentation

◆ __P() [1/11]

static void idct __P ( (int *, int *, PREC *, PREC, int) )

static

◆ __P() [2/11]

static void col221111_32 __P ( (int *, unsigned char *, int) )

static

◆ __P() [3/11]

static void scaleidctqtab __P ( (PREC *, PREC) )

static

◆ __P() [4/11]

static void initcol __P ( (PREC[][64]) )

static

◆ __P() [5/11]

static void dec_makehuff __P ( (struct dec_hufftbl *, int *, unsigned char *) )

static

◆ __P() [6/11]

static int dec_readmarker __P ( (struct in *) )

static

◆ __P() [7/11]

static void decode_mcus __P ( (struct in *, int *, int, struct scan *, int *) )

static

◆ __P() [8/11]

static int fillbits __P ( (struct in *, int, unsigned int) )

static

◆ __P() [9/11]

static int dec_rec2 __P ( (struct in *, struct dec_hufftbl *, int *, int, int) )

static

◆ __P() [10/11]

static void setinput __P ( (struct in *, unsigned char *) )

static

◆ __P() [11/11]

static void idctqtab __P ( (unsigned char *, PREC *) )

static

◆ col221111()

static void col221111	(	int *	out,
		unsigned char *	pic,
		int	width
	)

static

Definition at line 929 of file jpeg.c.

References PIC221111, width, and y.

Referenced by jpeg_decode().

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◆ col221111_16()

static void col221111_16	(	int *	out,
		unsigned char *	pic,
		int	width
	)

static

Definition at line 953 of file jpeg.c.

References PIC221111_16, width, and y.

Referenced by jpeg_decode().

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◆ col221111_32()

static void col221111_32	(	int *	out,
		unsigned char *	pic,
		int	width
	)

static

Definition at line 977 of file jpeg.c.

References PIC221111_32, width, and y.

Referenced by jpeg_decode().

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◆ dec_checkmarker()

static int dec_checkmarker ( void )

static

Definition at line 231 of file jpeg.c.

References dec_readmarker(), jpginfo::dri, dscans, glob_in, info, jpginfo::nm, jpginfo::ns, and jpginfo::rm.

Referenced by jpeg_decode().

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◆ dec_initscans()

static void dec_initscans ( void )

static

Definition at line 221 of file jpeg.c.

References jpginfo::dri, dscans, info, M_RST0, jpginfo::nm, jpginfo::ns, and jpginfo::rm.

Referenced by jpeg_decode().

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◆ dec_makehuff()

static void dec_makehuff	(	struct dec_hufftbl *	hu,
		int *	hufflen,
		unsigned char *	huffvals
	)

static

Definition at line 574 of file jpeg.c.

References c, DECBITS, dec_hufftbl::llvals, dec_hufftbl::maxcode, dec_hufftbl::valptr, dec_hufftbl::vals, and x.

Referenced by readtables().

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◆ dec_readmarker()

static int dec_readmarker ( struct in * in )

static

Definition at line 462 of file jpeg.c.

References in::bits, fillbits(), in::left, m, and in::marker.

Referenced by dec_checkmarker(), and jpeg_decode().

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◆ dec_rec2()

static int dec_rec2	(	struct in *	in,
		struct dec_hufftbl *	hu,
		int *	runp,
		int	c,
		int	i
	)

static

Definition at line 490 of file jpeg.c.

References c, DECBITS, GETBITS, LEBI_DCL, LEBI_GET, LEBI_PUT, M_BADHUFF, in::marker, dec_hufftbl::maxcode, UNGETBITS, dec_hufftbl::valptr, and dec_hufftbl::vals.

◆ decode_mcus()

static void decode_mcus	(	struct in *	in,
		int *	dct,
		int	n,
		struct scan *	sc,
		int *	maxp
	)

static

Definition at line 542 of file jpeg.c.

References scan::dc, DEC_REC, hufftblp::dhuff, scan::huac, scan::hudc, LEBI_DCL, LEBI_GET, LEBI_PUT, memset(), and scan::next.

Referenced by jpeg_decode().

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◆ fillbits()

static int fillbits	(	struct in *	in,
		int	le,
		unsigned int	bi
	)

static

Definition at line 428 of file jpeg.c.

References in::bits, in::data, m, M_EOF, in::marker, and in::p.

Referenced by dec_readmarker().

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◆ getbyte()

static int getbyte ( void )

static

Definition at line 106 of file jpeg.c.

References datap.

Referenced by jpeg_check_size(), jpeg_decode(), jpeg_fetch_size(), and readtables().

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◆ getword()

static int getword ( void )

static

Definition at line 111 of file jpeg.c.

Referenced by jpeg_check_size(), jpeg_decode(), jpeg_fetch_size(), and readtables().

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◆ idct()

void idct	(	int *	in,
		int *	out,
		PREC *	lquant,
		PREC	off,
		int	max
	)

Definition at line 683 of file jpeg.c.

References IDCT, ITOINT, PREC, and zig2.

Referenced by jpeg_decode().

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◆ idctqtab()

static void idctqtab	(	unsigned char *	qin,
		PREC *	qout
	)

static

Definition at line 768 of file jpeg.c.

References aaidct, IMULT, and zig.

Referenced by jpeg_decode().

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◆ initcol()

static void initcol ( PREC q[][64] )

static

Definition at line 813 of file jpeg.c.

References IFIX, and scaleidctqtab().

Referenced by jpeg_decode().

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◆ jpeg_check_size()

int jpeg_check_size	(	unsigned char *	buf,
		int	width,
		int	height
	)

Definition at line 256 of file jpeg.c.

References buf, datap, getbyte(), getword(), height, M_SOF0, readtables(), and width.

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◆ jpeg_decode()

int jpeg_decode	(	unsigned char *	buf,
		unsigned char *	pic,
		int	width,
		int	height,
		int	depth,
		struct jpeg_decdata *	decdata
	)

Definition at line 269 of file jpeg.c.

References buf, scan::cid, comp::cid, col221111(), col221111_16(), col221111_32(), comps, datap, jpeg_decdata::dcts, dec_checkmarker(), dec_huffac, dec_huffdc, dec_initscans(), dec_readmarker(), decode_mcus(), hufftblp::dhuff, jpeg_decdata::dquant, jpginfo::dri, dscans, ERR_BAD_TABLES, ERR_BAD_WIDTH_OR_HEIGHT, ERR_DEPTH_MISMATCH, ERR_HEIGHT_MISMATCH, ERR_ILLEGAL_HV, ERR_NO_EOI, ERR_NO_SOI, ERR_NOT_8BIT, ERR_NOT_SEQUENTIAL_DCT, ERR_NOT_YCBCR_221111, ERR_QUANT_TABLE_SELECTOR, ERR_TOO_MANY_COMPPS, ERR_UNKNOWN_CID_IN_SCAN, ERR_WIDTH_MISMATCH, ERR_WRONG_MARKER, getbyte(), getword(), glob_in, height, scan::huac, scan::hudc, scan::hv, comp::hv, idct(), idctqtab(), IFIX, info, initcol(), m, M_EOI, M_SOF0, M_SOI, M_SOS, MAXCOMP, jpginfo::nc, scan::next, jpginfo::nm, jpginfo::ns, jpeg_decdata::out, quant, readtables(), setinput(), scan::tq, comp::tq, and width.

Referenced by set_bootsplash().

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◆ jpeg_fetch_size()

void jpeg_fetch_size	(	unsigned char *	buf,
		int *	width,
		int *	height
	)

Definition at line 244 of file jpeg.c.

References buf, datap, getbyte(), getword(), height, M_SOF0, readtables(), and width.

Referenced by set_bootsplash().

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◆ readtables()

static int readtables ( int till )

static

Definition at line 148 of file jpeg.c.

References dec_makehuff(), dhuff, jpginfo::dri, getbyte(), getword(), info, m, M_DHT, M_DQT, M_DRI, and quant.

Referenced by jpeg_check_size(), jpeg_decode(), and jpeg_fetch_size().

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◆ scaleidctqtab()

static void scaleidctqtab	(	PREC *	q,
		PREC	sc
	)

static

Definition at line 778 of file jpeg.c.

References IMULT.

Referenced by initcol().

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◆ setinput()

static void setinput	(	struct in *	in,
		unsigned char *	p
	)

static

Definition at line 420 of file jpeg.c.

References in::bits, in::left, in::marker, and in::p.

Referenced by jpeg_decode().

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Variable Documentation

◆ aaidct

PREC aaidct[8]

static

Initial value:

= {
        IFIX(0.3535533906), IFIX(0.4903926402),
        IFIX(0.4619397663), IFIX(0.4157348062),
        IFIX(0.3535533906), IFIX(0.2777851165),
        IFIX(0.1913417162), IFIX(0.0975451610)
}

Definition at line 760 of file jpeg.c.

Referenced by idctqtab().

◆ comps

struct comp comps[MAXCOMP]

static

Definition at line 111 of file jpeg.c.

Referenced by jpeg_decode().

◆ datap

unsigned char* datap

static

Definition at line 104 of file jpeg.c.

Referenced by getbyte(), jpeg_check_size(), jpeg_decode(), and jpeg_fetch_size().

◆ dhuff

struct dec_hufftbl dhuff[4]

static

Definition at line 139 of file jpeg.c.

Referenced by readtables().

◆ dscans

struct scan dscans[MAXCOMP]

static

Definition at line 111 of file jpeg.c.

Referenced by dec_checkmarker(), dec_initscans(), and jpeg_decode().

◆ glob_in

struct in glob_in

static

Definition at line 139 of file jpeg.c.

Referenced by dec_checkmarker(), and jpeg_decode().

◆ info

struct jpginfo info

static

Definition at line 111 of file jpeg.c.

Referenced by dec_checkmarker(), dec_initscans(), jpeg_decode(), and readtables().

◆ quant

unsigned char quant[4][64]

static

Definition at line 139 of file jpeg.c.

Referenced by jpeg_decode(), and readtables().

◆ zig

unsigned char zig[64]

static

Initial value:

= {
        0, 1, 5, 6, 14, 15, 27, 28,
        2, 4, 7, 13, 16, 26, 29, 42,
        3, 8, 12, 17, 25, 30, 41, 43,
        9, 11, 18, 24, 31, 40, 44, 53,
        10, 19, 23, 32, 39, 45, 52, 54,
        20, 22, 33, 38, 46, 51, 55, 60,
        21, 34, 37, 47, 50, 56, 59, 61,
        35, 36, 48, 49, 57, 58, 62, 63
}

Definition at line 749 of file jpeg.c.

Referenced by idctqtab().

◆ zig2

unsigned char zig2[64]

static

Initial value:

= {
        0, 2, 3, 9, 10, 20, 21, 35,
        14, 16, 25, 31, 39, 46, 50, 57,
        5, 7, 12, 18, 23, 33, 37, 48,
        27, 29, 41, 44, 52, 55, 59, 62,
        15, 26, 30, 40, 45, 51, 56, 58,
        1, 4, 8, 11, 19, 22, 34, 36,
        28, 42, 43, 53, 54, 60, 61, 63,
        6, 13, 17, 24, 32, 38, 47, 49
}

Definition at line 672 of file jpeg.c.

Referenced by idct().

Data Structures

Macros

Functions

Variables

Macro Definition Documentation

◆ __LITTLE_ENDIAN

◆ __P

◆ C2

◆ C22

◆ C3IC1

◆ C4

◆ C5IC1

◆ C7IC1

◆ CBCRCG

◆ CLAMP

◆ dec_huffac

◆ dec_huffdc

◆ DEC_REC

◆ DECBITS

◆ GETBITS

◆ IC4

◆ IDCT

◆ IFIX

◆ IMULT

◆ ISHIFT

◆ ITOINT

◆ LEBI_DCL

◆ LEBI_GET

◆ LEBI_PUT

◆ M_APP0

◆ M_BADHUFF

◆ M_COM

◆ M_DHT

◆ M_DQT

◆ M_DRI

◆ M_EOF

◆ M_EOI

◆ M_RST0

◆ M_SOF0

◆ M_SOI

◆ M_SOS

◆ MAXCOMP

◆ ONE

◆ PIC

◆ PIC221111

◆ PIC221111_16

◆ PIC221111_32

◆ PIC_16

◆ PIC_32

◆ PREC

◆ ROT

◆ ROUND

◆ S2

◆ S22

◆ STORECLAMP

◆ UNGETBITS

◆ XMP

◆ XPM

◆ XPP

Function Documentation

◆ __P() [1/11]

◆ __P() [2/11]

◆ __P() [3/11]

◆ __P() [4/11]

◆ __P() [5/11]

◆ __P() [6/11]

◆ __P() [7/11]

◆ __P() [8/11]

◆ __P() [9/11]

◆ __P() [10/11]

◆ __P() [11/11]

◆ col221111()

◆ col221111_16()

◆ col221111_32()

◆ dec_checkmarker()

◆ dec_initscans()

◆ dec_makehuff()

◆ dec_readmarker()

◆ dec_rec2()

◆ decode_mcus()