/* * 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 */