tjpgd.c File Reference

#include "tjpgd.h"

Include dependency graph for tjpgd.c:

Go to the source code of this file.

Macros
#define	HUFF_BIT   10 /* Bit length to apply fast huffman decode */
#define	HUFF_LEN   (1 << HUFF_BIT)
#define	HUFF_MASK   (HUFF_LEN - 1)
#define	BYTECLIP(v)   Clip8[(unsigned int)(v) & 0x3FF]
#define	LDB_WORD(ptr)   (uint16_t)(((uint16_t)*((uint8_t*)(ptr))<<8)|(uint16_t)*(uint8_t*)((ptr)+1))

Functions
static void *	alloc_pool (JDEC *jd, size_t ndata)
static JRESULT	create_qt_tbl (JDEC *jd, const uint8_t *data, size_t ndata)
static JRESULT	create_huffman_tbl (JDEC *jd, const uint8_t *data, size_t ndata)
static int	huffext (JDEC *jd, unsigned int id, unsigned int cls)
static int	bitext (JDEC *jd, unsigned int nbit)
static JRESULT	restart (JDEC *jd, uint16_t rstn)
static void	block_idct (int32_t *src, jd_yuv_t *dst)
static JRESULT	mcu_load (JDEC *jd)
static JRESULT	mcu_output (JDEC *jd, int(*outfunc)(JDEC *, void *, JRECT *), unsigned int x, unsigned int y)
JRESULT	jd_prepare (JDEC *jd, size_t(*infunc)(JDEC *, uint8_t *, size_t), void *pool, size_t sz_pool, void *dev)
JRESULT	jd_decomp (JDEC *jd, int(*outfunc)(JDEC *, void *, JRECT *), uint8_t scale)

Variables
static const uint8_t	Zig [64]
static const uint16_t	Ipsf [64]
static const uint8_t	Clip8 [1024]

Macro Definition Documentation

BYTECLIP

#define BYTECLIP

(

v

)

Clip8[(unsigned int)(v) & 0x3FF]

Definition at line 74 of file tjpgd.c.

HUFF_BIT

#define HUFF_BIT   10 /* Bit length to apply fast huffman decode */

Definition at line 31 of file tjpgd.c.

HUFF_LEN

#define HUFF_LEN   (1 << HUFF_BIT)

Definition at line 32 of file tjpgd.c.

HUFF_MASK

#define HUFF_MASK   (HUFF_LEN - 1)

Definition at line 33 of file tjpgd.c.

LDB_WORD

#define LDB_WORD

(

ptr

)

(uint16_t)(((uint16_t)*((uint8_t*)(ptr))<<8)|(uint16_t)*(uint8_t*)((ptr)+1))

Definition at line 959 of file tjpgd.c.

Function Documentation

alloc_pool()

static void * alloc_pool ( JDEC *  jd, size_t  ndata  )

static

Definition at line 132 of file tjpgd.c.

References JDEC::pool, and JDEC::sz_pool.

Referenced by create_huffman_tbl(), create_qt_tbl(), and jd_prepare().

bitext()

static int bitext ( JDEC *  jd, unsigned int  nbit  )

static

Definition at line 423 of file tjpgd.c.

References JDEC::dbit, JDEC::dctr, JDEC::dptr, JDEC::inbuf, JDEC::infunc, JD_SZBUF, JDR_FMT1, JDR_INP, JDEC::marker, and JDEC::wreg.

Referenced by mcu_load().

block_idct()

static void block_idct ( int32_t *  src, jd_yuv_t *  dst  )

static

Definition at line 579 of file tjpgd.c.

References BYTECLIP.

Referenced by mcu_load().

create_huffman_tbl()

static JRESULT create_huffman_tbl ( JDEC *  jd, const uint8_t *  data, size_t  ndata  )

static

Definition at line 194 of file tjpgd.c.

References alloc_pool(), HUFF_BIT, HUFF_LEN, HUFF_MASK, JDEC::huffbits, JDEC::huffcode, JDEC::huffdata, JDEC::hufflut_ac, JDEC::hufflut_dc, JDR_FMT1, JDR_MEM1, JDR_OK, and JDEC::longofs.

Referenced by jd_prepare().

create_qt_tbl()

static JRESULT create_qt_tbl ( JDEC *  jd, const uint8_t *  data, size_t  ndata  )

static

Definition at line 158 of file tjpgd.c.

References alloc_pool(), Ipsf, JDR_FMT1, JDR_MEM1, JDR_OK, JDEC::qttbl, and Zig.

Referenced by jd_prepare().

huffext()

static int huffext ( JDEC *  jd, unsigned int  id, unsigned int  cls  )

static

Definition at line 282 of file tjpgd.c.

References JDEC::dbit, JDEC::dctr, JDEC::dptr, hd, HUFF_BIT, JDEC::huffbits, JDEC::huffcode, JDEC::huffdata, JDEC::hufflut_ac, JDEC::hufflut_dc, JDEC::inbuf, JDEC::infunc, JD_SZBUF, JDR_FMT1, JDR_INP, JDEC::longofs, JDEC::marker, and JDEC::wreg.

Referenced by mcu_load().

jd_decomp()

JRESULT jd_decomp	(	JDEC *	jd,
		int(*)(JDEC *, void *, JRECT *)	outfunc,
		uint8_t	scale
	)

Definition at line 1118 of file tjpgd.c.

References JDEC::dcv, JDEC::height, JD_USE_SCALE, JDR_OK, JDR_PAR, mcu_load(), mcu_output(), JDEC::msx, JDEC::msy, JDEC::nrst, restart(), JDEC::scale, and JDEC::width.

jd_prepare()

JRESULT jd_prepare	(	JDEC *	jd,
		size_t(*)(JDEC *, uint8_t *, size_t)	infunc,
		void *	pool,
		size_t	sz_pool,
		void *	dev
	)

Definition at line 962 of file tjpgd.c.

References alloc_pool(), create_huffman_tbl(), create_qt_tbl(), JDEC::dctr, JDEC::device, JDEC::dptr, JDEC::height, JDEC::huffbits, JDEC::inbuf, JDEC::infunc, JD_FASTDECODE, JD_SZBUF, JDR_FMT1, JDR_FMT3, JDR_INP, JDR_MEM1, JDR_MEM2, JDR_OK, LDB_WORD, JDEC::mcubuf, JDEC::msx, JDEC::msy, JDEC::ncomp, JDEC::nrst, JDEC::pool, JDEC::qtid, JDEC::qttbl, JDEC::sz_pool, JDEC::width, and JDEC::workbuf.

mcu_load()

static JRESULT mcu_load ( JDEC *  jd )

static

Definition at line 702 of file tjpgd.c.

References bitext(), block_idct(), JDEC::dcv, huffext(), JD_FASTDECODE, JD_FORMAT, JD_USE_SCALE, JDR_FMT1, JDR_OK, JDEC::mcubuf, JDEC::msx, JDEC::msy, JDEC::ncomp, JDEC::qtid, JDEC::qttbl, JDEC::scale, JDEC::workbuf, and Zig.

Referenced by jd_decomp().

mcu_output()

static JRESULT mcu_output ( JDEC *  jd, int(*)(JDEC *, void *, JRECT *)  outfunc, unsigned int  x, unsigned int  y  )

static

Definition at line 788 of file tjpgd.c.

References JRECT::bottom, BYTECLIP, JDEC::height, JD_FORMAT, JD_USE_SCALE, JDR_INTR, JDR_OK, JRECT::left, JDEC::mcubuf, JDEC::msx, JDEC::msy, r, JRECT::right, JDEC::scale, JRECT::top, JDEC::width, and JDEC::workbuf.

Referenced by jd_decomp().

restart()

static JRESULT restart ( JDEC *  jd, uint16_t  rstn  )

static

Definition at line 508 of file tjpgd.c.

References JDEC::dbit, JDEC::dctr, JDEC::dcv, JDEC::dptr, JDEC::inbuf, JDEC::infunc, JD_SZBUF, JDR_FMT1, JDR_INP, JDR_OK, and JDEC::marker.

Referenced by jd_decomp().

Variable Documentation

Clip8

const uint8_t Clip8[1024]

static

Definition at line 76 of file tjpgd.c.

Ipsf

const uint16_t Ipsf[64]

static

Initial value:

= { 
  (uint16_t)(1.00000*8192), (uint16_t)(1.38704*8192), (uint16_t)(1.30656*8192), (uint16_t)(1.17588*8192), (uint16_t)(1.00000*8192), (uint16_t)(0.78570*8192), (uint16_t)(0.54120*8192), (uint16_t)(0.27590*8192),
  (uint16_t)(1.38704*8192), (uint16_t)(1.92388*8192), (uint16_t)(1.81226*8192), (uint16_t)(1.63099*8192), (uint16_t)(1.38704*8192), (uint16_t)(1.08979*8192), (uint16_t)(0.75066*8192), (uint16_t)(0.38268*8192),
  (uint16_t)(1.30656*8192), (uint16_t)(1.81226*8192), (uint16_t)(1.70711*8192), (uint16_t)(1.53636*8192), (uint16_t)(1.30656*8192), (uint16_t)(1.02656*8192), (uint16_t)(0.70711*8192), (uint16_t)(0.36048*8192),
  (uint16_t)(1.17588*8192), (uint16_t)(1.63099*8192), (uint16_t)(1.53636*8192), (uint16_t)(1.38268*8192), (uint16_t)(1.17588*8192), (uint16_t)(0.92388*8192), (uint16_t)(0.63638*8192), (uint16_t)(0.32442*8192),
  (uint16_t)(1.00000*8192), (uint16_t)(1.38704*8192), (uint16_t)(1.30656*8192), (uint16_t)(1.17588*8192), (uint16_t)(1.00000*8192), (uint16_t)(0.78570*8192), (uint16_t)(0.54120*8192), (uint16_t)(0.27590*8192),
  (uint16_t)(0.78570*8192), (uint16_t)(1.08979*8192), (uint16_t)(1.02656*8192), (uint16_t)(0.92388*8192), (uint16_t)(0.78570*8192), (uint16_t)(0.61732*8192), (uint16_t)(0.42522*8192), (uint16_t)(0.21677*8192),
  (uint16_t)(0.54120*8192), (uint16_t)(0.75066*8192), (uint16_t)(0.70711*8192), (uint16_t)(0.63638*8192), (uint16_t)(0.54120*8192), (uint16_t)(0.42522*8192), (uint16_t)(0.29290*8192), (uint16_t)(0.14932*8192),
  (uint16_t)(0.27590*8192), (uint16_t)(0.38268*8192), (uint16_t)(0.36048*8192), (uint16_t)(0.32442*8192), (uint16_t)(0.27590*8192), (uint16_t)(0.21678*8192), (uint16_t)(0.14932*8192), (uint16_t)(0.07612*8192)
}

Definition at line 55 of file tjpgd.c.

Referenced by create_qt_tbl().

Zig

const uint8_t Zig[64]

static

Initial value:

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

Definition at line 41 of file tjpgd.c.

Referenced by create_qt_tbl(), and mcu_load().