vx32

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jpc_qmfb.h (6450B)


      1 /*
      2  * Copyright (c) 1999-2000 Image Power, Inc. and the University of
      3  *   British Columbia.
      4  * Copyright (c) 2001-2002 Michael David Adams.
      5  * All rights reserved.
      6  */
      7 
      8 /* __START_OF_JASPER_LICENSE__
      9  * 
     10  * JasPer License Version 2.0
     11  * 
     12  * Copyright (c) 1999-2000 Image Power, Inc.
     13  * Copyright (c) 1999-2000 The University of British Columbia
     14  * Copyright (c) 2001-2003 Michael David Adams
     15  * 
     16  * All rights reserved.
     17  * 
     18  * Permission is hereby granted, free of charge, to any person (the
     19  * "User") obtaining a copy of this software and associated documentation
     20  * files (the "Software"), to deal in the Software without restriction,
     21  * including without limitation the rights to use, copy, modify, merge,
     22  * publish, distribute, and/or sell copies of the Software, and to permit
     23  * persons to whom the Software is furnished to do so, subject to the
     24  * following conditions:
     25  * 
     26  * 1.  The above copyright notices and this permission notice (which
     27  * includes the disclaimer below) shall be included in all copies or
     28  * substantial portions of the Software.
     29  * 
     30  * 2.  The name of a copyright holder shall not be used to endorse or
     31  * promote products derived from the Software without specific prior
     32  * written permission.
     33  * 
     34  * THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS
     35  * LICENSE.  NO USE OF THE SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER
     36  * THIS DISCLAIMER.  THE SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS
     37  * "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
     38  * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
     39  * PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.  IN NO
     40  * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL
     41  * INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING
     42  * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
     43  * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
     44  * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.  NO ASSURANCES ARE
     45  * PROVIDED BY THE COPYRIGHT HOLDERS THAT THE SOFTWARE DOES NOT INFRINGE
     46  * THE PATENT OR OTHER INTELLECTUAL PROPERTY RIGHTS OF ANY OTHER ENTITY.
     47  * EACH COPYRIGHT HOLDER DISCLAIMS ANY LIABILITY TO THE USER FOR CLAIMS
     48  * BROUGHT BY ANY OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL
     49  * PROPERTY RIGHTS OR OTHERWISE.  AS A CONDITION TO EXERCISING THE RIGHTS
     50  * GRANTED HEREUNDER, EACH USER HEREBY ASSUMES SOLE RESPONSIBILITY TO SECURE
     51  * ANY OTHER INTELLECTUAL PROPERTY RIGHTS NEEDED, IF ANY.  THE SOFTWARE
     52  * IS NOT FAULT-TOLERANT AND IS NOT INTENDED FOR USE IN MISSION-CRITICAL
     53  * SYSTEMS, SUCH AS THOSE USED IN THE OPERATION OF NUCLEAR FACILITIES,
     54  * AIRCRAFT NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL
     55  * SYSTEMS, DIRECT LIFE SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH
     56  * THE FAILURE OF THE SOFTWARE OR SYSTEM COULD LEAD DIRECTLY TO DEATH,
     57  * PERSONAL INJURY, OR SEVERE PHYSICAL OR ENVIRONMENTAL DAMAGE ("HIGH
     58  * RISK ACTIVITIES").  THE COPYRIGHT HOLDERS SPECIFICALLY DISCLAIM ANY
     59  * EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR HIGH RISK ACTIVITIES.
     60  * 
     61  * __END_OF_JASPER_LICENSE__
     62  */
     63 
     64 /*
     65  * Quadrature Mirror-Image Filter Bank (QMFB) Routines
     66  *
     67  * $Id: jpc_qmfb.h 1918 2005-07-24 14:12:08Z baford $
     68  */
     69 
     70 #ifndef JPC_QMFB_H
     71 #define JPC_QMFB_H
     72 
     73 /******************************************************************************\
     74 * Includes.
     75 \******************************************************************************/
     76 
     77 #include "jasper/jas_seq.h"
     78 
     79 /******************************************************************************\
     80 * Constants.
     81 \******************************************************************************/
     82 
     83 /* The maximum number of channels for a QMF bank. */
     84 #define	JPC_QMFB1D_MAXCHANS	2
     85 
     86 /* Select reversible integer-to-integer mode. */
     87 #define	JPC_QMFB1D_RITIMODE	1
     88 
     89 /* Vertical filtering. */
     90 #define	JPC_QMFB1D_VERT	0x10000
     91 
     92 /* QMFB IDs. */
     93 #define	JPC_QMFB1D_FT	1	/* 5/3 */
     94 #define	JPC_QMFB1D_NS	2	/* 9/7 */
     95 
     96 /******************************************************************************\
     97 * Types.
     98 \******************************************************************************/
     99 
    100 /* Forward declaration. */
    101 struct jpc_qmfb1dops_s;
    102 
    103 /* Band information. */
    104 
    105 typedef struct {
    106 
    107 	/* The starting index for the band in the downsampled domain. */
    108 	int start;
    109 
    110 	/* The ending index for the band in the downsampled domain. */
    111 	int end;
    112 
    113 	/* The location of the start of the band. */
    114 	int locstart;
    115 
    116 	/* The location of the end of the band. */
    117 	int locend;
    118 
    119 } jpc_qmfb1dband_t;
    120 
    121 /* QMF bank */
    122 
    123 typedef struct {
    124 
    125 	/* The operations for this QMFB. */
    126 	struct jpc_qmfb1dops_s *ops;
    127 
    128 } jpc_qmfb1d_t;
    129 
    130 /* QMFB operations. */
    131 
    132 typedef struct jpc_qmfb1dops_s {
    133 
    134 	/* The number of channels in the QMFB. */
    135 	int (*getnumchans)(jpc_qmfb1d_t *qmfb);
    136 
    137 	/* Get the analysis filters for this QMFB. */
    138 	int (*getanalfilters)(jpc_qmfb1d_t *qmfb, int len, jas_seq2d_t **filters);
    139 
    140 	/* Get the synthesis filters for this QMFB. */
    141 	int (*getsynfilters)(jpc_qmfb1d_t *qmfb, int len, jas_seq2d_t **filters);
    142 
    143 	/* Do analysis. */
    144 	void (*analyze)(jpc_qmfb1d_t *qmfb, int flags, jas_seq2d_t *x);
    145 
    146 	/* Do synthesis. */
    147 	void (*synthesize)(jpc_qmfb1d_t *qmfb, int flags, jas_seq2d_t *x);
    148 
    149 } jpc_qmfb1dops_t;
    150 
    151 /******************************************************************************\
    152 * Functions.
    153 \******************************************************************************/
    154 
    155 /* Create a QMFB from a QMFB ID. */
    156 jpc_qmfb1d_t *jpc_qmfb1d_make(int qmfbid);
    157 
    158 /* Create a copy of a QMFB. */
    159 jpc_qmfb1d_t *jpc_qmfb1d_copy(jpc_qmfb1d_t *qmfb);
    160 
    161 /* Destroy a QMFB. */
    162 void jpc_qmfb1d_destroy(jpc_qmfb1d_t *qmfb);
    163 
    164 /* Get the number of channels for a QMFB. */
    165 int jpc_qmfb1d_getnumchans(jpc_qmfb1d_t *qmfb);
    166 
    167 /* Get the analysis filters for a QMFB. */
    168 int jpc_qmfb1d_getanalfilters(jpc_qmfb1d_t *qmfb, int len,
    169   jas_seq2d_t **filters);
    170 
    171 /* Get the synthesis filters for a QMFB. */
    172 int jpc_qmfb1d_getsynfilters(jpc_qmfb1d_t *qmfb, int len,
    173   jas_seq2d_t **filters);
    174 
    175 /* Get the bands for a QMFB. */
    176 void jpc_qmfb1d_getbands(jpc_qmfb1d_t *qmfb, int flags, uint_fast32_t xstart,
    177   uint_fast32_t ystart, uint_fast32_t xend, uint_fast32_t yend, int maxbands,
    178   int *numbandsptr, jpc_qmfb1dband_t *bands);
    179 
    180 /* Perform analysis. */
    181 void jpc_qmfb1d_analyze(jpc_qmfb1d_t *qmfb, int flags, jas_seq2d_t *x);
    182 
    183 /* Perform synthesis. */
    184 void jpc_qmfb1d_synthesize(jpc_qmfb1d_t *qmfb, int flags, jas_seq2d_t *x);
    185 
    186 #endif