jpegls.h File Reference

JPEG-LS common code. More...

#include "avcodec.h"
#include "libavutil/common.h"

Go to the source code of this file.

Data Structures
struct	JpeglsContext
struct	JLSState

Macros
#define	R(a, i)   (bits == 8 ? ((uint8_t*)(a))[i] : ((uint16_t*)(a))[i] )
#define	W(a, i, v)   (bits == 8 ? (((uint8_t*)(a))[i]=v) : (((uint16_t*)(a))[i]=v))

Functions
void	ff_jpegls_init_state (JLSState *state)
	Calculate initial JPEG-LS parameters.
static int	ff_jpegls_quantize (JLSState *s, int v)
	Calculate quantized gradient value, used for context determination.
void	ff_jpegls_reset_coding_parameters (JLSState *s, int reset_all)
	Calculate JPEG-LS codec values.
static void	ff_jpegls_downscale_state (JLSState *state, int Q)
static int	ff_jpegls_update_state_regular (JLSState *state, int Q, int err)

Variables
const uint8_t	ff_log2_run [32]

Detailed Description

JPEG-LS common code.

Definition in file jpegls.h.

Macro Definition Documentation

#define R	(		a,
			i
	)		(bits == 8 ? ((uint8_t*)(a))[i] : ((uint16_t*)(a))[i] )

Definition at line 111 of file jpegls.h.

#define W	(		a,
			i,
			v
	)		(bits == 8 ? (((uint8_t*)(a))[i]=v) : (((uint16_t*)(a))[i]=v))

Definition at line 112 of file jpegls.h.

Referenced by evolve(), initPv(), ls_decode_line(), and ls_encode_line().

Function Documentation

void ff_jpegls_init_state

(

JLSState *

state

)

Calculate initial JPEG-LS parameters.

Definition at line 30 of file jpegls.c.

Referenced by encode_picture_ls(), and ff_jpegls_decode_picture().

static int ff_jpegls_quantize ( JLSState *  s, int  v  )

inlinestatic

Calculate quantized gradient value, used for context determination.

Definition at line 57 of file jpegls.h.

Referenced by ls_decode_line(), and ls_encode_line().

void ff_jpegls_reset_coding_parameters	(	JLSState *	s,
		int	reset_all
	)

Calculate JPEG-LS codec values.

Definition at line 57 of file jpegls.c.

Referenced by encode_picture_ls(), ff_jpegls_decode_picture(), and ls_store_lse().

static void ff_jpegls_downscale_state ( JLSState *  state, int  Q  )

inlinestatic

Definition at line 80 of file jpegls.h.

Referenced by ff_jpegls_update_state_regular(), ls_encode_runterm(), and ls_get_code_runterm().

static int ff_jpegls_update_state_regular ( JLSState *  state, int  Q, int  err  )

inlinestatic

Definition at line 89 of file jpegls.h.

Referenced by ls_encode_regular(), and ls_get_code_regular().

Variable Documentation

const uint8_t ff_log2_run[32]

Definition at line 37 of file bitstream.c.

Referenced by decode_line(), encode_line(), ls_decode_line(), ls_encode_line(), and ls_encode_run().