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/*
* Copyright (c) 2002-2007, Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium
* Copyright (c) 2002-2007, Professor Benoit Macq
* Copyright (c) 2001-2003, David Janssens
* Copyright (c) 2002-2003, Yannick Verschueren
* Copyright (c) 2003-2007, Francois-Olivier Devaux and Antonin Descampe
* Copyright (c) 2005, Herve Drolon, FreeImage Team
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef __T1_H
#define __T1_H
/**
@file t1.h
@brief Implementation of the tier-1 coding (coding of code-block coefficients) (T1)
The functions in T1.C have for goal to realize the tier-1 coding operation. The functions
in T1.C are used by some function in TCD.C.
*/
/** @defgroup T1 T1 - Implementation of the tier-1 coding */
/*@{*/
/* ----------------------------------------------------------------------- */
#define T1_NMSEDEC_BITS 7
#define T1_SIG_NE 0x0001 /**< Context orientation : North-East direction */
#define T1_SIG_SE 0x0002 /**< Context orientation : South-East direction */
#define T1_SIG_SW 0x0004 /**< Context orientation : South-West direction */
#define T1_SIG_NW 0x0008 /**< Context orientation : North-West direction */
#define T1_SIG_N 0x0010 /**< Context orientation : North direction */
#define T1_SIG_E 0x0020 /**< Context orientation : East direction */
#define T1_SIG_S 0x0040 /**< Context orientation : South direction */
#define T1_SIG_W 0x0080 /**< Context orientation : West direction */
#define T1_SIG_OTH (T1_SIG_N|T1_SIG_NE|T1_SIG_E|T1_SIG_SE|T1_SIG_S|T1_SIG_SW|T1_SIG_W|T1_SIG_NW)
#define T1_SIG_PRIM (T1_SIG_N|T1_SIG_E|T1_SIG_S|T1_SIG_W)
#define T1_SGN_N 0x0100
#define T1_SGN_E 0x0200
#define T1_SGN_S 0x0400
#define T1_SGN_W 0x0800
#define T1_SGN (T1_SGN_N|T1_SGN_E|T1_SGN_S|T1_SGN_W)
#define T1_SIG 0x1000
#define T1_REFINE 0x2000
#define T1_VISIT 0x4000
#define T1_NUMCTXS_ZC 9
#define T1_NUMCTXS_SC 5
#define T1_NUMCTXS_MAG 3
#define T1_NUMCTXS_AGG 1
#define T1_NUMCTXS_UNI 1
#define T1_CTXNO_ZC 0
#define T1_CTXNO_SC (T1_CTXNO_ZC+T1_NUMCTXS_ZC)
#define T1_CTXNO_MAG (T1_CTXNO_SC+T1_NUMCTXS_SC)
#define T1_CTXNO_AGG (T1_CTXNO_MAG+T1_NUMCTXS_MAG)
#define T1_CTXNO_UNI (T1_CTXNO_AGG+T1_NUMCTXS_AGG)
#define T1_NUMCTXS (T1_CTXNO_UNI+T1_NUMCTXS_UNI)
#define T1_NMSEDEC_FRACBITS (T1_NMSEDEC_BITS-1)
#define T1_TYPE_MQ 0 /**< Normal coding using entropy coder */
#define T1_TYPE_RAW 1 /**< No encoding the information is store under raw format in codestream (mode switch RAW)*/
/** We hold the state of individual data points for the T1 encoder using
* a single 32-bit flags word to hold the state of 4 data points. This corresponds
* to the 4-point-high columns that the data is processed in.
*
* These #defines declare the layout of a 32-bit flags word.
*
* This is currently done for encoding only.
*/
#define T1_SIGMA_0 (1 << 0)
#define T1_SIGMA_1 (1 << 1)
#define T1_SIGMA_2 (1 << 2)
#define T1_SIGMA_3 (1 << 3)
#define T1_SIGMA_4 (1 << 4)
#define T1_SIGMA_5 (1 << 5)
#define T1_SIGMA_6 (1 << 6)
#define T1_SIGMA_7 (1 << 7)
#define T1_SIGMA_8 (1 << 8)
#define T1_SIGMA_9 (1 << 9)
#define T1_SIGMA_10 (1 << 10)
#define T1_SIGMA_11 (1 << 11)
#define T1_SIGMA_12 (1 << 12)
#define T1_SIGMA_13 (1 << 13)
#define T1_SIGMA_14 (1 << 14)
#define T1_SIGMA_15 (1 << 15)
#define T1_SIGMA_16 (1 << 16)
#define T1_SIGMA_17 (1 << 17)
#define T1_CHI_0 (1 << 18)
#define T1_CHI_0_I 18
#define T1_CHI_1 (1 << 19)
#define T1_CHI_1_I 19
#define T1_MU_0 (1 << 20)
#define T1_PI_0 (1 << 21)
#define T1_CHI_2 (1 << 22)
#define T1_CHI_2_I 22
#define T1_MU_1 (1 << 23)
#define T1_PI_1 (1 << 24)
#define T1_CHI_3 (1 << 25)
#define T1_MU_2 (1 << 26)
#define T1_PI_2 (1 << 27)
#define T1_CHI_4 (1 << 28)
#define T1_MU_3 (1 << 29)
#define T1_PI_3 (1 << 30)
#define T1_CHI_5 (1 << 31)
/** As an example, the bits T1_SIGMA_3, T1_SIGMA_4 and T1_SIGMA_5
* indicate the significance state of the west neighbour of data point zero
* of our four, the point itself, and its east neighbour respectively.
* Many of the bits are arranged so that given a flags word, you can
* look at the values for the data point 0, then shift the flags
* word right by 3 bits and look at the same bit positions to see the
* values for data point 1.
*
* The #defines below help a bit with this; say you have a flags word
* f, you can do things like
*
* (f & T1_SIGMA_THIS)
*
* to see the significance bit of data point 0, then do
*
* ((f >> 3) & T1_SIGMA_THIS)
*
* to see the significance bit of data point 1.
*/
#define T1_SIGMA_NW T1_SIGMA_0
#define T1_SIGMA_N T1_SIGMA_1
#define T1_SIGMA_NE T1_SIGMA_2
#define T1_SIGMA_W T1_SIGMA_3
#define T1_SIGMA_THIS T1_SIGMA_4
#define T1_SIGMA_E T1_SIGMA_5
#define T1_SIGMA_SW T1_SIGMA_6
#define T1_SIGMA_S T1_SIGMA_7
#define T1_SIGMA_SE T1_SIGMA_8
#define T1_SIGMA_NEIGHBOURS (T1_SIGMA_NW | T1_SIGMA_N | T1_SIGMA_NE | T1_SIGMA_W | T1_SIGMA_E | T1_SIGMA_SW | T1_SIGMA_S | T1_SIGMA_SE)
#define T1_CHI_THIS T1_CHI_1
#define T1_CHI_THIS_I T1_CHI_1_I
#define T1_MU_THIS T1_MU_0
#define T1_PI_THIS T1_PI_0
#define T1_LUT_SGN_W (1 << 0)
#define T1_LUT_SIG_N (1 << 1)
#define T1_LUT_SGN_E (1 << 2)
#define T1_LUT_SIG_W (1 << 3)
#define T1_LUT_SGN_N (1 << 4)
#define T1_LUT_SIG_E (1 << 5)
#define T1_LUT_SGN_S (1 << 6)
#define T1_LUT_SIG_S (1 << 7)
/* ----------------------------------------------------------------------- */
typedef short dec_flags_t;
typedef unsigned int enc_flags_t;
/**
Tier-1 coding (coding of code-block coefficients)
*/
typedef struct opj_t1 {
/** codec context */
opj_common_ptr cinfo;
/** MQC component */
opj_mqc_t *mqc;
/** RAW component */
opj_raw_t *raw;
int *data;
dec_flags_t *dec_flags;
enc_flags_t *enc_flags;
int w;
int h;
int datasize;
int dec_flags_size;
int enc_flags_size;
int dec_flags_stride;
int enc_flags_stride;
} opj_t1_t;
#define MACRO_t1_flags(x,y) t1->dec_flags[((x)*(t1->dec_flags_stride))+(y)]
/** @name Exported functions */
/*@{*/
/* ----------------------------------------------------------------------- */
/**
Create a new T1 handle
and initialize the look-up tables of the Tier-1 coder/decoder
@return Returns a new T1 handle if successful, returns NULL otherwise
@see t1_init_luts
*/
opj_t1_t* t1_create(opj_common_ptr cinfo);
/**
Destroy a previously created T1 handle
@param t1 T1 handle to destroy
*/
void t1_destroy(opj_t1_t *t1);
/**
Encode the code-blocks of a tile
@param t1 T1 handle
@param tile The tile to encode
@param tcp Tile coding parameters
*/
void t1_encode_cblks(opj_t1_t *t1, opj_tcd_tile_t *tile, opj_tcp_t *tcp);
/**
Decode the code-blocks of a tile
@param t1 T1 handle
@param tilec The tile to decode
@param tccp Tile coding parameters
*/
void t1_decode_cblks(opj_t1_t* t1, opj_tcd_tilecomp_t* tilec, opj_tccp_t* tccp);
/* ----------------------------------------------------------------------- */
/*@}*/
/*@}*/
#endif /* __T1_H */
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