148 lines
5.1 KiB
C
148 lines
5.1 KiB
C
/*
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* Copyright (c) 2002-2007, Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium
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* Copyright (c) 2002-2007, Professor Benoit Macq
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* Copyright (c) 2001-2003, David Janssens
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* Copyright (c) 2002-2003, Yannick Verschueren
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* Copyright (c) 2003-2007, Francois-Olivier Devaux and Antonin Descampe
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* Copyright (c) 2005, Herve Drolon, FreeImage Team
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __T1_H
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#define __T1_H
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/**
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@file t1.h
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@brief Implementation of the tier-1 coding (coding of code-block coefficients) (T1)
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The functions in T1.C have for goal to realize the tier-1 coding operation. The functions
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in T1.C are used by some function in TCD.C.
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*/
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/** @defgroup T1 T1 - Implementation of the tier-1 coding */
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/*@{*/
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/* ----------------------------------------------------------------------- */
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#define T1_NMSEDEC_BITS 7
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#define T1_SIG_NE 0x0001 /**< Context orientation : North-East direction */
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#define T1_SIG_SE 0x0002 /**< Context orientation : South-East direction */
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#define T1_SIG_SW 0x0004 /**< Context orientation : South-West direction */
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#define T1_SIG_NW 0x0008 /**< Context orientation : North-West direction */
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#define T1_SIG_N 0x0010 /**< Context orientation : North direction */
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#define T1_SIG_E 0x0020 /**< Context orientation : East direction */
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#define T1_SIG_S 0x0040 /**< Context orientation : South direction */
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#define T1_SIG_W 0x0080 /**< Context orientation : West direction */
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#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)
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#define T1_SIG_PRIM (T1_SIG_N|T1_SIG_E|T1_SIG_S|T1_SIG_W)
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#define T1_SGN_N 0x0100
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#define T1_SGN_E 0x0200
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#define T1_SGN_S 0x0400
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#define T1_SGN_W 0x0800
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#define T1_SGN (T1_SGN_N|T1_SGN_E|T1_SGN_S|T1_SGN_W)
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#define T1_SIG 0x1000
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#define T1_REFINE 0x2000
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#define T1_VISIT 0x4000
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#define T1_NUMCTXS_ZC 9
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#define T1_NUMCTXS_SC 5
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#define T1_NUMCTXS_MAG 3
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#define T1_NUMCTXS_AGG 1
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#define T1_NUMCTXS_UNI 1
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#define T1_CTXNO_ZC 0
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#define T1_CTXNO_SC (T1_CTXNO_ZC+T1_NUMCTXS_ZC)
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#define T1_CTXNO_MAG (T1_CTXNO_SC+T1_NUMCTXS_SC)
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#define T1_CTXNO_AGG (T1_CTXNO_MAG+T1_NUMCTXS_MAG)
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#define T1_CTXNO_UNI (T1_CTXNO_AGG+T1_NUMCTXS_AGG)
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#define T1_NUMCTXS (T1_CTXNO_UNI+T1_NUMCTXS_UNI)
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#define T1_NMSEDEC_FRACBITS (T1_NMSEDEC_BITS-1)
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#define T1_TYPE_MQ 0 /**< Normal coding using entropy coder */
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#define T1_TYPE_RAW 1 /**< No encoding the information is store under raw format in codestream (mode switch RAW)*/
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/* ----------------------------------------------------------------------- */
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typedef short flag_t;
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/**
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Tier-1 coding (coding of code-block coefficients)
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*/
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typedef struct opj_t1 {
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/** codec context */
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opj_common_ptr cinfo;
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/** MQC component */
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opj_mqc_t *mqc;
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/** RAW component */
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opj_raw_t *raw;
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int *data;
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flag_t *flags;
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int w;
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int h;
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int datasize;
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int flagssize;
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int flags_stride;
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} opj_t1_t;
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#define MACRO_t1_flags(x,y) t1->flags[((x)*(t1->flags_stride))+(y)]
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/** @name Exported functions */
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/*@{*/
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/* ----------------------------------------------------------------------- */
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/**
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Create a new T1 handle
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and initialize the look-up tables of the Tier-1 coder/decoder
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@return Returns a new T1 handle if successful, returns NULL otherwise
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@see t1_init_luts
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*/
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opj_t1_t* t1_create(opj_common_ptr cinfo);
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/**
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Destroy a previously created T1 handle
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@param t1 T1 handle to destroy
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*/
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void t1_destroy(opj_t1_t *t1);
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/**
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Encode the code-blocks of a tile
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@param t1 T1 handle
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@param tile The tile to encode
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@param tcp Tile coding parameters
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*/
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void t1_encode_cblks(opj_t1_t *t1, opj_tcd_tile_t *tile, opj_tcp_t *tcp);
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/**
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Decode the code-blocks of a tile
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@param t1 T1 handle
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@param tile The tile to decode
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@param tcp Tile coding parameters
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*/
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void t1_decode_cblks(opj_t1_t *t1, opj_tcd_tile_t *tile, opj_tcp_t *tcp);
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/* ----------------------------------------------------------------------- */
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/*@}*/
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/*@}*/
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#endif /* __T1_H */
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