/*
- * Copyright (c) 2001-2002, David Janssens
+ * Copyright (c) 2001-2003, David Janssens
+ * Copyright (c) 2002-2003, Yannick Verschueren
+ * Copyright (c) 2003-2005, Francois Devaux and Antonin Descampe
+ * Copyright (c) 2005, Herv� Drolon, FreeImage Team
+ * Copyright (c) 2002-2005, Communications and remote sensing Laboratory, Universite catholique de Louvain, Belgium
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
#ifndef __T1_H
#define __T1_H
+/**
+@file t1.h
+@brief Implementation of the tier-1 coding (coding of code-block coefficients) (T1)
-#include "tcd.h"
-#include "j2k.h"
+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.
+*/
-/*
- * Initialize the look-up tables of the Tier-1 coder/decoder
- */
-void t1_init_luts();
+/** @defgroup T1 T1 - Implementation of the tier-1 coding */
+/*@{*/
-/*
- * Encode the code-blocks of a tile
- * tile: the tile to encode
- * tcp: tile coding parameters
- */
-void t1_encode_cblks(tcd_tile_t * tile, j2k_tcp_t * tcp);
+/* ----------------------------------------------------------------------- */
+#define T1_NMSEDEC_BITS 7
-/*
- * Decode the code-blocks of a tile
- * tile: the tile to encode
- * tcp: tile coding parameters
- */
-void t1_decode_cblks(tcd_tile_t * tile, j2k_tcp_t * tcp);
+#define T1_MAXCBLKW 1024 /**< Maximum size of code-block (width) */
+#define T1_MAXCBLKH 1024 /**< Maximum size of code-block (heigth) */
+
+#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_AGG 1
+#define T1_NUMCTXS_ZC 9
+#define T1_NUMCTXS_MAG 3
+#define T1_NUMCTXS_SC 5
+#define T1_NUMCTXS_UNI 1
+
+#define T1_CTXNO_AGG 0
+#define T1_CTXNO_ZC (T1_CTXNO_AGG+T1_NUMCTXS_AGG)
+#define T1_CTXNO_MAG (T1_CTXNO_ZC+T1_NUMCTXS_ZC)
+#define T1_CTXNO_SC (T1_CTXNO_MAG+T1_NUMCTXS_MAG)
+#define T1_CTXNO_UNI (T1_CTXNO_SC+T1_NUMCTXS_SC)
+#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)*/
+
+/* ----------------------------------------------------------------------- */
+
+/**
+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 lut_ctxno_zc[1024];
+ int lut_ctxno_sc[256];
+ int lut_ctxno_mag[4096];
+ int lut_spb[256];
+ int lut_nmsedec_sig[1 << T1_NMSEDEC_BITS];
+ int lut_nmsedec_sig0[1 << T1_NMSEDEC_BITS];
+ int lut_nmsedec_ref[1 << T1_NMSEDEC_BITS];
+ int lut_nmsedec_ref0[1 << T1_NMSEDEC_BITS];
+
+ int data[T1_MAXCBLKH][T1_MAXCBLKW];
+ int flags[T1_MAXCBLKH + 2][T1_MAXCBLKH + 2];
+
+} opj_t1_t;
+
+/** @name Local static functions */
+/*@{*/
+/* ----------------------------------------------------------------------- */
+static int t1_getctxno_zc(opj_t1_t *t1, int f, int orient);
+static int t1_getctxno_sc(opj_t1_t *t1, int f);
+static int t1_getctxno_mag(opj_t1_t *t1, int f);
+static int t1_getspb(opj_t1_t *t1, int f);
+static int t1_getnmsedec_sig(opj_t1_t *t1, int x, int bitpos);
+static int t1_getnmsedec_ref(opj_t1_t *t1, int x, int bitpos);
+static void t1_updateflags(int *fp, int s);
+/**
+Encode significant pass
+*/
+static void t1_enc_sigpass_step(opj_t1_t *t1, int *fp, int *dp, int orient, int bpno, int one, int *nmsedec, char type, int vsc);
+/**
+Decode significant pass
+*/
+static void t1_dec_sigpass_step(opj_t1_t *t1, int *fp, int *dp, int orient, int oneplushalf, char type, int vsc);
+/**
+Encode significant pass
+*/
+static void t1_enc_sigpass(opj_t1_t *t1, int w, int h, int bpno, int orient, int *nmsedec, char type, int cblksty);
+/**
+Decode significant pass
+*/
+static void t1_dec_sigpass(opj_t1_t *t1, int w, int h, int bpno, int orient, char type, int cblksty);
+/**
+Encode refinement pass
+*/
+static void t1_enc_refpass_step(opj_t1_t *t1, int *fp, int *dp, int bpno, int one, int *nmsedec, char type, int vsc);
+/**
+Decode refinement pass
+*/
+static void t1_dec_refpass_step(opj_t1_t *t1, int *fp, int *dp, int poshalf, int neghalf, char type, int vsc);
+/**
+Encode refinement pass
+*/
+static void t1_enc_refpass(opj_t1_t *t1, int w, int h, int bpno, int *nmsedec, char type, int cblksty);
+/**
+Decode refinement pass
+*/
+static void t1_dec_refpass(opj_t1_t *t1, int w, int h, int bpno, char type, int cblksty);
+/**
+Encode clean-up pass
+*/
+static void t1_enc_clnpass_step(opj_t1_t *t1, int *fp, int *dp, int orient, int bpno, int one, int *nmsedec, int partial, int vsc);
+/**
+Decode clean-up pass
+*/
+static void t1_dec_clnpass_step(opj_t1_t *t1, int *fp, int *dp, int orient, int oneplushalf, int partial, int vsc);
+/**
+Encode clean-up pass
+*/
+static void t1_enc_clnpass(opj_t1_t *t1, int w, int h, int bpno, int orient, int *nmsedec, int cblksty);
+/**
+Decode clean-up pass
+*/
+static void t1_dec_clnpass(opj_t1_t *t1, int w, int h, int bpno, int orient, int cblksty);
+static double t1_getwmsedec(opj_t1_t *t1, int nmsedec, int compno, int level, int orient, int bpno, int qmfbid, double stepsize, int numcomps);
+/**
+Encode 1 code-block
+@param t1 T1 handle
+@param cblk Code-block coding parameters
+@param orient
+@param compno Component number
+@param level
+@param qmfbid
+@param stepsize
+@param cblksty Code-block style
+@param numcomps
+@param tile
+*/
+static void t1_encode_cblk(opj_t1_t *t1, opj_tcd_cblk_t * cblk, int orient, int compno, int level, int qmfbid, double stepsize, int cblksty, int numcomps, opj_tcd_tile_t * tile);
+/**
+Decode 1 code-block
+@param t1 T1 handle
+@param cblk Code-block coding parameters
+@param orient
+@param roishift Region of interest shifting value
+@param cblksty Code-block style
+*/
+static void t1_decode_cblk(opj_t1_t *t1, opj_tcd_cblk_t * cblk, int orient, int roishift, int cblksty);
+static int t1_init_ctxno_zc(int f, int orient);
+static int t1_init_ctxno_sc(int f);
+static int t1_init_ctxno_mag(int f);
+static int t1_init_spb(int f);
+/**
+Initialize the look-up tables of the Tier-1 coder/decoder
+@param t1 T1 handle
+*/
+static void t1_init_luts(opj_t1_t *t1);
+
+/* ----------------------------------------------------------------------- */
+/*@}*/
+
+/** @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 tile The tile to decode
+@param tcp Tile coding parameters
+*/
+void t1_decode_cblks(opj_t1_t *t1, opj_tcd_tile_t *tile, opj_tcp_t *tcp);
+/* ----------------------------------------------------------------------- */
+/*@}*/
+
+/*@}*/
-#endif
+#endif /* __T1_H */
projects / openjpeg.git / blobdiff