001: /*
002: * $RCSfile: StdEntropyCoderOptions.java,v $
003: * $Revision: 1.1 $
004: * $Date: 2005/02/11 05:02:05 $
005: * $State: Exp $
006: *
007: * Class: StdEntropyCoderOptions
008: *
009: * Description: Entropy coding engine of stripes in
010: * code-blocks options
011: *
012: *
013: *
014: * COPYRIGHT:
015: *
016: * This software module was originally developed by Raphaël Grosbois and
017: * Diego Santa Cruz (Swiss Federal Institute of Technology-EPFL); Joel
018: * Askelöf (Ericsson Radio Systems AB); and Bertrand Berthelot, David
019: * Bouchard, Félix Henry, Gerard Mozelle and Patrice Onno (Canon Research
020: * Centre France S.A) in the course of development of the JPEG2000
021: * standard as specified by ISO/IEC 15444 (JPEG 2000 Standard). This
022: * software module is an implementation of a part of the JPEG 2000
023: * Standard. Swiss Federal Institute of Technology-EPFL, Ericsson Radio
024: * Systems AB and Canon Research Centre France S.A (collectively JJ2000
025: * Partners) agree not to assert against ISO/IEC and users of the JPEG
026: * 2000 Standard (Users) any of their rights under the copyright, not
027: * including other intellectual property rights, for this software module
028: * with respect to the usage by ISO/IEC and Users of this software module
029: * or modifications thereof for use in hardware or software products
030: * claiming conformance to the JPEG 2000 Standard. Those intending to use
031: * this software module in hardware or software products are advised that
032: * their use may infringe existing patents. The original developers of
033: * this software module, JJ2000 Partners and ISO/IEC assume no liability
034: * for use of this software module or modifications thereof. No license
035: * or right to this software module is granted for non JPEG 2000 Standard
036: * conforming products. JJ2000 Partners have full right to use this
037: * software module for his/her own purpose, assign or donate this
038: * software module to any third party and to inhibit third parties from
039: * using this software module for non JPEG 2000 Standard conforming
040: * products. This copyright notice must be included in all copies or
041: * derivative works of this software module.
042: *
043: * Copyright (c) 1999/2000 JJ2000 Partners.
044: * */
045:
046: package jj2000.j2k.entropy;
047:
048: /**
049: * This interface define the constants that identify the possible options for
050: * the entropy coder, as well some fixed parameters of the JPEG 2000 entropy
051: * coder.
052: * */
053: public interface StdEntropyCoderOptions {
054:
055: /** The flag bit to indicate that selective arithmetic coding bypass
056: * should be used. In this mode some of the coding passes bypass the
057: * arithmetic coder and raw bits are output. If this flag is turned on and
058: * the 'OPT_TERM_PASS' one is turned off then the any non-bypass coding
059: * pass before a bypass coding pass must use MQ termination. */
060: public final static int OPT_BYPASS = 1;
061:
062: /** The flag bit to indicate that the MQ states for all contexts should be
063: * reset at the end of each non-bypass coding pass. */
064: public final static int OPT_RESET_MQ = 1 << 1;
065:
066: /** The flag bit to indicate that regular termination should be used. When
067: * this is specified termination is performed after each coding
068: * pass. Termination is applied to both arithmetically coded and bypass
069: * (i.e. raw) passes . */
070: public final static int OPT_TERM_PASS = 1 << 2;
071:
072: /** The flag bit to indicate the vertically stripe-causal context
073: * formation should be used. */
074: public final static int OPT_VERT_STR_CAUSAL = 1 << 3;
075:
076: /** The flag bit to indicate that error resilience info is embedded on MQ
077: * termination. The predictable error-resilient MQ termination at the
078: * encoder is necessary in this case. */
079: public final static int OPT_PRED_TERM = 1 << 4;
080:
081: /** The flag bit to indicate that a segmentation marker is to be
082: * inserted at the end of each normalization coding pass. The segment
083: * marker is the four symbol sequence 1010 that are sent through the MQ
084: * coder using the UNIFORM context. */
085: public final static int OPT_SEG_SYMBOLS = 1 << 5;
086:
087: /** The minimum code-block dimension. The nominal width or height of a
088: * code-block must never be less than this. It is 4. */
089: public static final int MIN_CB_DIM = 4;
090:
091: /** The maximum code-block dimension. No code-block should be larger,
092: * either in width or height, than this value. It is 1024. */
093: public static final int MAX_CB_DIM = 1024;
094:
095: /** The maximum code-block area (width x height). The surface covered by
096: * a nominal size block should never be larger than this. It is 4096 */
097: public static final int MAX_CB_AREA = 4096;
098:
099: /** The stripe height. This is the nominal value of the stripe height. It
100: * is 4. */
101: public static final int STRIPE_HEIGHT = 4;
102:
103: /** The number of coding passes per bit-plane. This is the number of
104: * passes per bit-plane. It is 3. */
105: public static final int NUM_PASSES = 3;
106:
107: /** The number of most significant bit-planes where bypass mode is not to
108: * be used, even if bypass mode is on: 4. */
109: public static final int NUM_NON_BYPASS_MS_BP = 4;
110:
111: /** The number of empty passes in the most significant bit-plane. It is
112: 2. */
113: public static final int NUM_EMPTY_PASSES_IN_MS_BP = 2;
114:
115: /** The index of the first "raw" pass, if bypass mode is on. */
116: public static final int FIRST_BYPASS_PASS_IDX = NUM_PASSES
117: * NUM_NON_BYPASS_MS_BP - NUM_EMPTY_PASSES_IN_MS_BP;
118:
119: }
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