/*
* CVS identifier:
*
* $Id: StdEntropyCoder.java,v 1.41 2002/07/04 15:53:32 grosbois Exp $
*
* Class: StdEntropyCoder
*
* Description: Entropy coding engine of stripes in code-blocks
*
*
*
* COPYRIGHT:
*
* This software module was originally developed by Raphaël Grosbois and
* Diego Santa Cruz (Swiss Federal Institute of Technology-EPFL); Joel
* Askelöf (Ericsson Radio Systems AB); and Bertrand Berthelot, David
* Bouchard, Félix Henry, Gerard Mozelle and Patrice Onno (Canon Research
* Centre France S.A) in the course of development of the JPEG2000
* standard as specified by ISO/IEC 15444 (JPEG 2000 Standard). This
* software module is an implementation of a part of the JPEG 2000
* Standard. Swiss Federal Institute of Technology-EPFL, Ericsson Radio
* Systems AB and Canon Research Centre France S.A (collectively JJ2000
* Partners) agree not to assert against ISO/IEC and users of the JPEG
* 2000 Standard (Users) any of their rights under the copyright, not
* including other intellectual property rights, for this software module
* with respect to the usage by ISO/IEC and Users of this software module
* or modifications thereof for use in hardware or software products
* claiming conformance to the JPEG 2000 Standard. Those intending to use
* this software module in hardware or software products are advised that
* their use may infringe existing patents. The original developers of
* this software module, JJ2000 Partners and ISO/IEC assume no liability
* for use of this software module or modifications thereof. No license
* or right to this software module is granted for non JPEG 2000 Standard
* conforming products. JJ2000 Partners have full right to use this
* software module for his/her own purpose, assign or donate this
* software module to any third party and to inhibit third parties from
* using this software module for non JPEG 2000 Standard conforming
* products. This copyright notice must be included in all copies or
* derivative works of this software module.
*
* Copyright (c) 1999/2000 JJ2000 Partners.
* */
using System;
using CSJ2K.j2k.quantization.quantizer;
using CSJ2K.j2k.wavelet.analysis;
using CSJ2K.j2k.codestream;
using CSJ2K.j2k.wavelet;
using CSJ2K.j2k.encoder;
using CSJ2K.j2k.entropy;
using CSJ2K.j2k.image;
using CSJ2K.j2k.util;
using CSJ2K.j2k.io;
using CSJ2K.j2k;
namespace CSJ2K.j2k.entropy.encoder
{
/// This class implements the JPEG 2000 entropy coder, which codes stripes in
/// code-blocks. This entropy coding engine can function in a single-threaded
/// mode where one code-block is encoded at a time, or in a multi-threaded mode
/// where multiple code-blocks are entropy coded in parallel. The interface
/// presented by this class is the same in both modes.
///
/// The number of threads used by this entropy coder is specified by the
/// "jj2000.j2k.entropy.encoder.StdEntropyCoder.nthreads" Java system
/// property. If set to "0" the single threaded implementation is used. If set
/// to 'n' ('n' larger than 0) then 'n' extra threads are started by this class
/// which are used to encode the code-blocks in parallel (i.e. ideally 'n'
/// code-blocks will be encoded in parallel at a time). On multiprocessor
/// machines under a "native threads" Java Virtual Machine implementation each
/// one of these threads can run on a separate processor speeding up the
/// encoding time. By default the single-threaded implementation is used. The
/// multi-threaded implementation currently assumes that the vast majority of
/// consecutive calls to 'getNextCodeBlock()' will be done on the same
/// component. If this is not the case, the speed-up that can be expected on
/// multiprocessor machines might be significantly decreased.
///
/// The code-blocks are rectangular, with dimensions which must be powers of
/// 2. Each dimension has to be no smaller than 4 and no larger than 256. The
/// product of the two dimensions (i.e. area of the code-block) may not exceed
/// 4096.
///
/// Context 0 of the MQ-coder is used as the uniform one (uniform,
/// non-adaptive probability distribution). Context 1 is used for RLC
/// coding. Contexts 2-10 are used for zero-coding (ZC), contexts 11-15 are
/// used for sign-coding (SC) and contexts 16-18 are used for
/// magnitude-refinement (MR).
///
/// This implementation buffers the symbols and calls the MQ coder only once
/// per stripe and per coding pass, to reduce the method call overhead.
///
/// This implementation also provides some timing features. They can be
/// enabled by setting the 'DO_TIMING' constant of this class to true and
/// recompiling. The timing uses the 'System.currentTimeMillis()' Java API
/// call, which returns wall clock time, not the actual CPU time used. The
/// timing results will be printed on the message output. Since the times
/// reported are wall clock times and not CPU usage times they can not be added
/// to find the total used time (i.e. some time might be counted in several
/// places). When timing is disabled ('DO_TIMING' is false) there is no penalty
/// if the compiler performs some basic optimizations. Even if not the penalty
/// should be negligeable.
///
/// The source module must implement the CBlkQuantDataSrcEnc interface and
/// code-block's data is received in a CBlkWTData instance. This modules sends
/// code-block's information in a CBlkRateDistStats instance.
///
///
///
///
///
///
///
///
///
public class StdEntropyCoder:EntropyCoder
{
/// Whether to collect timing information or not: false. Used as a compile
/// time directive.
///
private const bool DO_TIMING = false;
/// The cumulative wall time for the entropy coding engine, for each
/// component. In the single-threaded implementation it is the total time,
/// in the multi-threaded implementation it is the time spent managing the
/// compressor threads only.
///
//private long[] time;
/// The Java system property name for the number of threads to use:
/// jj2000.j2k.entropy.encoder.StdEntropyCoder.nthreads
///
public const System.String THREADS_PROP_NAME = "jj2000.j2k.entropy.encoder.StdEntropyCoder.nthreads";
/// The default value for the property in THREADS_PROP_NAME: 0
public const System.String DEF_THREADS_NUM = "0";
/// The increase in priority for the compressor threads, currently 3. The
/// compressor threads will have a priority of THREADS_PRIORITY_INC more
/// than the priority of the thread calling this class constructor. Used
/// only in the multi-threaded implementation.
///
public const int THREADS_PRIORITY_INC = 0;
/// The pool of threads, for the threaded implementation. It is null, if
/// non threaded implementation is used
///
private ThreadPool tPool;
/// The queue of idle compressors. Used in multithreaded
/// implementation only
///
private System.Collections.ArrayList idleComps;
/// The queue of completed compressors, for each component. Used
/// in multithreaded implementation only.
///
private System.Collections.ArrayList[] completedComps;
/// The number of busy compressors, for each component. Used in
/// multithreaded implementation only.
///
private int[] nBusyComps;
/// A flag indicating for each component if all the code-blocks of the *
/// current tile have been returned. Used in multithreaded implementation
/// only.
///
private bool[] finishedTileComponent;
/// The MQ coder used, for each thread
private MQCoder[] mqT;
/// The raw bit output used, for each thread
private BitToByteOutput[] boutT;
/// The output stream used, for each thread
private ByteOutputBuffer[] outT;
/// The code-block size specifications
private CBlkSizeSpec cblks;
/// The precinct partition specifications
private PrecinctSizeSpec pss;
/// By-pass mode specifications
public StringSpec bms;
/// MQ reset specifications
public StringSpec mqrs;
/// Regular termination specifications
public StringSpec rts;
/// Causal stripes specifications
public StringSpec css;
/// Error resilience segment symbol use specifications
public StringSpec sss;
/// The length calculation specifications
public StringSpec lcs;
/// The termination type specifications
public StringSpec tts;
/// The options that are turned on, as flag bits. One element for each
/// tile-component. The options are 'OPT_TERM_PASS', 'OPT_RESET_MQ',
/// 'OPT_VERT_STR_CAUSAL', 'OPT_BYPASS' and 'OPT_SEG_SYMBOLS' as defined in
/// the StdEntropyCoderOptions interface
///
///
///
///
///
private int[][] opts = null;
/// The length calculation type for each tile-component
private int[][] lenCalc = null;
/// The termination type for each tile-component
private int[][] tType = null;
/// Number of bits used for the Zero Coding lookup table
private const int ZC_LUT_BITS = 8;
/// Zero Coding context lookup tables for the LH global orientation
//UPGRADE_NOTE: Final was removed from the declaration of 'ZC_LUT_LH '. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1003'"
private static readonly int[] ZC_LUT_LH = new int[1 << ZC_LUT_BITS];
/// Zero Coding context lookup tables for the HL global orientation
//UPGRADE_NOTE: Final was removed from the declaration of 'ZC_LUT_HL '. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1003'"
private static readonly int[] ZC_LUT_HL = new int[1 << ZC_LUT_BITS];
/// Zero Coding context lookup tables for the HH global orientation
//UPGRADE_NOTE: Final was removed from the declaration of 'ZC_LUT_HH '. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1003'"
private static readonly int[] ZC_LUT_HH = new int[1 << ZC_LUT_BITS];
/// Number of bits used for the Sign Coding lookup table
private const int SC_LUT_BITS = 9;
/// Sign Coding context lookup table. The index into the table is a 9 bit
/// index, which correspond the the value in the 'state' array shifted by
/// 'SC_SHIFT'. Bits 8-5 are the signs of the horizontal-left,
/// horizontal-right, vertical-up and vertical-down neighbors,
/// respectively. Bit 4 is not used (0 or 1 makes no difference). Bits 3-0
/// are the significance of the horizontal-left, horizontal-right,
/// vertical-up and vertical-down neighbors, respectively. The least 4 bits
/// of the value in the lookup table define the context number and the sign
/// bit defines the "sign predictor".
///
//UPGRADE_NOTE: Final was removed from the declaration of 'SC_LUT '. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1003'"
private static readonly int[] SC_LUT = new int[1 << SC_LUT_BITS];
/// The mask to obtain the context index from the 'SC_LUT'
private const int SC_LUT_MASK = (1 << 4) - 1;
/// The shift to obtain the sign predictor from the 'SC_LUT'. It must be
/// an unsigned shift.
///
private const int SC_SPRED_SHIFT = 31;
/// The sign bit for int data
private const int INT_SIGN_BIT = 1 << 31;
/// The number of bits used for the Magnitude Refinement lookup table
private const int MR_LUT_BITS = 9;
/// Magnitude Refinement context lookup table
//UPGRADE_NOTE: Final was removed from the declaration of 'MR_LUT '. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1003'"
private static readonly int[] MR_LUT = new int[1 << MR_LUT_BITS];
/// The number of contexts used
private const int NUM_CTXTS = 19;
/// The RLC context
private const int RLC_CTXT = 1;
/// The UNIFORM context (with a uniform probability distribution which
/// does not adapt)
///
private const int UNIF_CTXT = 0;
/// The initial states for the MQ coder
//UPGRADE_NOTE: Final was removed from the declaration of 'MQ_INIT'. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1003'"
private static readonly int[] MQ_INIT = new int[]{46, 3, 4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
/// The 4 bits of the error resilience segmentation symbol (1010)
//UPGRADE_NOTE: Final was removed from the declaration of 'SEG_SYMBOLS'. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1003'"
private static readonly int[] SEG_SYMBOLS = new int[]{1, 0, 1, 0};
/// The 4 contexts for the error resilience segmentation symbol (always
/// the UNIFORM context, UNIF_CTXT)
///
//UPGRADE_NOTE: Final was removed from the declaration of 'SEG_SYMB_CTXTS '. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1003'"
private static readonly int[] SEG_SYMB_CTXTS = new int[]{UNIF_CTXT, UNIF_CTXT, UNIF_CTXT, UNIF_CTXT};
/// The state array for each thread. Each element of the state array stores
/// the state of two coefficients. The lower 16 bits store the state of a
/// coefficient in row 'i' and column 'j', while the upper 16 bits store
/// the state of a coefficient in row 'i+1' and column 'j'. The 'i' row is
/// either the first or the third row of a stripe. This packing of the
/// states into 32 bit words allows a faster scan of all coefficients on
/// each coding pass and diminished the amount of data transferred. The
/// size of the state array is increased by 1 on each side (top, bottom,
/// left, right) to handle boundary conditions without any special logic.
///
/// The state of a coefficient is stored in the following way in the
/// lower 16 bits, where bit 0 is the least significant bit. Bit 15 is the
/// significance of a coefficient (0 if non-significant, 1 otherwise). Bit
/// 14 is the visited state (i.e. if a coefficient has been coded in the
/// significance propagation pass of the current bit-plane). Bit 13 is the
/// "non zero-context" state (i.e. if one of the eight immediate neighbors
/// is significant it is 1, otherwise is 0). Bits 12 to 9 store the sign of
/// the already significant left, right, up and down neighbors (1 for
/// negative, 0 for positive or not yet significant). Bit 8 indicates if
/// the magnitude refinement has already been applied to the
/// coefficient. Bits 7 to 4 store the significance of the left, right, up
/// and down neighbors (1 for significant, 0 for non significant). Bits 3
/// to 0 store the significance of the diagonal coefficients (up-left,
/// up-right, down-left and down-right; 1 for significant, 0 for non
/// significant).
///
/// The upper 16 bits the state is stored as in the lower 16 bits, but
/// with the bits shifted up by 16.
///
/// The lower 16 bits are referred to as "row 1" ("R1") while the upper
/// 16 bits are referred to as "row 2" ("R2").
///
///
private int[][] stateT;
/* The separation between the upper and lower bits in the state array: 16
* */
private const int STATE_SEP = 16;
/// The flag bit for the significance in the state array, for row 1.
private const int STATE_SIG_R1 = 1 << 15;
/// The flag bit for the "visited" bit in the state array, for row 1.
private const int STATE_VISITED_R1 = 1 << 14;
/// The flag bit for the "not zero context" bit in the state array, for
/// row 1. This bit is always the OR of bits STATE_H_L_R1, STATE_H_R_R1,
/// STATE_V_U_R1, STATE_V_D_R1, STATE_D_UL_R1, STATE_D_UR_R1, STATE_D_DL_R1
/// and STATE_D_DR_R1.
///
private const int STATE_NZ_CTXT_R1 = 1 << 13;
/// The flag bit for the horizontal-left sign in the state array, for row
/// 1. This bit can only be set if the STATE_H_L_R1 is also set.
///
private const int STATE_H_L_SIGN_R1 = 1 << 12;
/// The flag bit for the horizontal-right sign in the state array, for
/// row 1. This bit can only be set if the STATE_H_R_R1 is also set.
///
private const int STATE_H_R_SIGN_R1 = 1 << 11;
/// The flag bit for the vertical-up sign in the state array, for row
/// 1. This bit can only be set if the STATE_V_U_R1 is also set.
///
private const int STATE_V_U_SIGN_R1 = 1 << 10;
/// The flag bit for the vertical-down sign in the state array, for row
/// 1. This bit can only be set if the STATE_V_D_R1 is also set.
///
private const int STATE_V_D_SIGN_R1 = 1 << 9;
/// The flag bit for the previous MR primitive applied in the state array,
/// for row 1.
///
private const int STATE_PREV_MR_R1 = 1 << 8;
/// The flag bit for the horizontal-left significance in the state array,
/// for row 1.
///
private const int STATE_H_L_R1 = 1 << 7;
/// The flag bit for the horizontal-right significance in the state array,
/// for row 1.
///
private const int STATE_H_R_R1 = 1 << 6;
/// The flag bit for the vertical-up significance in the state array, for
/// row 1.
///
private const int STATE_V_U_R1 = 1 << 5;
/// The flag bit for the vertical-down significance in the state array,
/// for row 1.
///
private const int STATE_V_D_R1 = 1 << 4;
/// The flag bit for the diagonal up-left significance in the state array,
/// for row 1.
///
private const int STATE_D_UL_R1 = 1 << 3;
/// The flag bit for the diagonal up-right significance in the state
/// array, for row 1.
///
private const int STATE_D_UR_R1 = 1 << 2;
/// The flag bit for the diagonal down-left significance in the state
/// array, for row 1.
///
private const int STATE_D_DL_R1 = 1 << 1;
/// The flag bit for the diagonal down-right significance in the state
/// array , for row 1.
///
private const int STATE_D_DR_R1 = 1;
/// The flag bit for the significance in the state array, for row 2.
//UPGRADE_NOTE: Final was removed from the declaration of 'STATE_SIG_R2 '. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1003'"
private static readonly int STATE_SIG_R2 = STATE_SIG_R1 << STATE_SEP;
/// The flag bit for the "visited" bit in the state array, for row 2.
//UPGRADE_NOTE: Final was removed from the declaration of 'STATE_VISITED_R2 '. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1003'"
private static readonly int STATE_VISITED_R2 = STATE_VISITED_R1 << STATE_SEP;
/// The flag bit for the "not zero context" bit in the state array, for
/// row 2. This bit is always the OR of bits STATE_H_L_R2, STATE_H_R_R2,
/// STATE_V_U_R2, STATE_V_D_R2, STATE_D_UL_R2, STATE_D_UR_R2, STATE_D_DL_R2
/// and STATE_D_DR_R2.
///
//UPGRADE_NOTE: Final was removed from the declaration of 'STATE_NZ_CTXT_R2 '. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1003'"
private static readonly int STATE_NZ_CTXT_R2 = STATE_NZ_CTXT_R1 << STATE_SEP;
/// The flag bit for the horizontal-left sign in the state array, for row
/// 2. This bit can only be set if the STATE_H_L_R2 is also set.
///
//UPGRADE_NOTE: Final was removed from the declaration of 'STATE_H_L_SIGN_R2 '. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1003'"
private static readonly int STATE_H_L_SIGN_R2 = STATE_H_L_SIGN_R1 << STATE_SEP;
/// The flag bit for the horizontal-right sign in the state array, for
/// row 2. This bit can only be set if the STATE_H_R_R2 is also set.
///
//UPGRADE_NOTE: Final was removed from the declaration of 'STATE_H_R_SIGN_R2 '. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1003'"
private static readonly int STATE_H_R_SIGN_R2 = STATE_H_R_SIGN_R1 << STATE_SEP;
/// The flag bit for the vertical-up sign in the state array, for row
/// 2. This bit can only be set if the STATE_V_U_R2 is also set.
///
//UPGRADE_NOTE: Final was removed from the declaration of 'STATE_V_U_SIGN_R2 '. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1003'"
private static readonly int STATE_V_U_SIGN_R2 = STATE_V_U_SIGN_R1 << STATE_SEP;
/// The flag bit for the vertical-down sign in the state array, for row
/// 2. This bit can only be set if the STATE_V_D_R2 is also set.
///
//UPGRADE_NOTE: Final was removed from the declaration of 'STATE_V_D_SIGN_R2 '. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1003'"
private static readonly int STATE_V_D_SIGN_R2 = STATE_V_D_SIGN_R1 << STATE_SEP;
/// The flag bit for the previous MR primitive applied in the state array,
/// for row 2.
///
//UPGRADE_NOTE: Final was removed from the declaration of 'STATE_PREV_MR_R2 '. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1003'"
private static readonly int STATE_PREV_MR_R2 = STATE_PREV_MR_R1 << STATE_SEP;
/// The flag bit for the horizontal-left significance in the state array,
/// for row 2.
///
//UPGRADE_NOTE: Final was removed from the declaration of 'STATE_H_L_R2 '. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1003'"
private static readonly int STATE_H_L_R2 = STATE_H_L_R1 << STATE_SEP;
/// The flag bit for the horizontal-right significance in the state array,
/// for row 2.
///
//UPGRADE_NOTE: Final was removed from the declaration of 'STATE_H_R_R2 '. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1003'"
private static readonly int STATE_H_R_R2 = STATE_H_R_R1 << STATE_SEP;
/// The flag bit for the vertical-up significance in the state array, for
/// row 2.
///
//UPGRADE_NOTE: Final was removed from the declaration of 'STATE_V_U_R2 '. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1003'"
private static readonly int STATE_V_U_R2 = STATE_V_U_R1 << STATE_SEP;
/// The flag bit for the vertical-down significance in the state array,
/// for row 2.
///
//UPGRADE_NOTE: Final was removed from the declaration of 'STATE_V_D_R2 '. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1003'"
private static readonly int STATE_V_D_R2 = STATE_V_D_R1 << STATE_SEP;
/// The flag bit for the diagonal up-left significance in the state array,
/// for row 2.
///
//UPGRADE_NOTE: Final was removed from the declaration of 'STATE_D_UL_R2 '. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1003'"
private static readonly int STATE_D_UL_R2 = STATE_D_UL_R1 << STATE_SEP;
/// The flag bit for the diagonal up-right significance in the state
/// array, for row 2.
///
//UPGRADE_NOTE: Final was removed from the declaration of 'STATE_D_UR_R2 '. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1003'"
private static readonly int STATE_D_UR_R2 = STATE_D_UR_R1 << STATE_SEP;
/// The flag bit for the diagonal down-left significance in the state
/// array, for row 2.
///
//UPGRADE_NOTE: Final was removed from the declaration of 'STATE_D_DL_R2 '. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1003'"
private static readonly int STATE_D_DL_R2 = STATE_D_DL_R1 << STATE_SEP;
/// The flag bit for the diagonal down-right significance in the state
/// array , for row 2.
///
//UPGRADE_NOTE: Final was removed from the declaration of 'STATE_D_DR_R2 '. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1003'"
private static readonly int STATE_D_DR_R2 = STATE_D_DR_R1 << STATE_SEP;
/// The mask to isolate the significance bits for row 1 and 2 of the state
/// array.
///
//UPGRADE_NOTE: Final was removed from the declaration of 'SIG_MASK_R1R2 '. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1003'"
private static readonly int SIG_MASK_R1R2 = STATE_SIG_R1 | STATE_SIG_R2;
/// The mask to isolate the visited bits for row 1 and 2 of the state
/// array.
///
//UPGRADE_NOTE: Final was removed from the declaration of 'VSTD_MASK_R1R2 '. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1003'"
private static readonly int VSTD_MASK_R1R2 = STATE_VISITED_R1 | STATE_VISITED_R2;
/// The mask to isolate the bits necessary to identify RLC coding state
/// (significant, visited and non-zero context, for row 1 and 2).
///
//UPGRADE_NOTE: Final was removed from the declaration of 'RLC_MASK_R1R2 '. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1003'"
private static readonly int RLC_MASK_R1R2 = STATE_SIG_R1 | STATE_SIG_R2 | STATE_VISITED_R1 | STATE_VISITED_R2 | STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2;
/// The mask to obtain the ZC_LUT index from the state information
// This is needed because of the STATE_V_D_SIGN_R1, STATE_V_U_SIGN_R1,
// STATE_H_R_SIGN_R1, and STATE_H_L_SIGN_R1 bits.
private const int ZC_MASK = (1 << 8) - 1;
/// The shift to obtain the SC index to 'SC_LUT' from the state
/// information, for row 1.
///
private const int SC_SHIFT_R1 = 4;
/// The shift to obtain the SC index to 'SC_LUT' from the state
/// information, for row 2.
///
//UPGRADE_NOTE: Final was removed from the declaration of 'SC_SHIFT_R2 '. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1003'"
private static readonly int SC_SHIFT_R2 = SC_SHIFT_R1 + STATE_SEP;
/// The bit mask to isolate the state bits relative to the sign coding
/// lookup table ('SC_LUT').
///
//UPGRADE_NOTE: Final was removed from the declaration of 'SC_MASK '. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1003'"
private static readonly int SC_MASK = (1 << SC_LUT_BITS) - 1;
/// The mask to obtain the MR index to 'MR_LUT' from the 'state'
/// information. It is to be applied after the 'MR_SHIFT'.
///
//UPGRADE_NOTE: Final was removed from the declaration of 'MR_MASK '. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1003'"
private static readonly int MR_MASK = (1 << MR_LUT_BITS) - 1;
/// The number of bits used to index in the 'fm' lookup table, 7. The 'fs'
/// table is indexed with one less bit.
///
private const int MSE_LKP_BITS = 7;
private const int MSE_LKP_BITS_M1 = 6;
/// The number of fractional bits used to store data in the 'fm' and 'fs'
/// lookup tables.
///
private const int MSE_LKP_FRAC_BITS = 13;
/// Distortion estimation lookup table for bits coded using the sign-code
/// (SC) primative, for lossy coding (i.e. normal).
///
//UPGRADE_NOTE: Final was removed from the declaration of 'FS_LOSSY '. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1003'"
private static readonly int[] FS_LOSSY = new int[1 << MSE_LKP_BITS_M1];
/// Distortion estimation lookup table for bits coded using the
/// magnitude-refinement (MR) primative, for lossy coding (i.e. normal)
///
//UPGRADE_NOTE: Final was removed from the declaration of 'FM_LOSSY '. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1003'"
private static readonly int[] FM_LOSSY = new int[1 << MSE_LKP_BITS];
/// Distortion estimation lookup table for bits coded using the sign-code
/// (SC) primative, for lossless coding and last bit-plane. This table is
/// different from 'fs_lossy' since when doing lossless coding the residual
/// distortion after the last bit-plane is coded is strictly 0.
///
//UPGRADE_NOTE: Final was removed from the declaration of 'FS_LOSSLESS '. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1003'"
private static readonly int[] FS_LOSSLESS = new int[1 << MSE_LKP_BITS_M1];
/// Distortion estimation lookup table for bits coded using the
/// magnitude-refinement (MR) primative, for lossless coding and last
/// bit-plane. This table is different from 'fs_lossless' since when doing
/// lossless coding the residual distortion after the last bit-plane is
/// coded is strictly 0.
///
//UPGRADE_NOTE: Final was removed from the declaration of 'FM_LOSSLESS '. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1003'"
private static readonly int[] FM_LOSSLESS = new int[1 << MSE_LKP_BITS];
/// The buffer for distortion values (avoids reallocation for each
/// code-block), for each thread.
///
private double[][] distbufT;
/// The buffer for rate values (avoids reallocation for each
/// code-block), for each thread.
///
private int[][] ratebufT;
/// The buffer for indicating terminated passes (avoids reallocation for
/// each code-block), for each thread.
///
private bool[][] istermbufT;
/// The source code-block to entropy code (avoids reallocation for each
/// code-block), for each thread.
///
private CBlkWTData[] srcblkT;
/// Buffer for symbols to send to the MQ-coder, for each thread. Used to
/// reduce the number of calls to the MQ coder.
///
// NOTE: The symbol buffer has not prooved to be of any great improvement
// in encoding time, but it does not hurt. It's performance should be
// better studied under different JVMs.
private int[][] symbufT;
/// Buffer for the contexts to use when sending buffered symbols to the
/// MQ-coder, for each thread. Used to reduce the number of calls to the MQ
/// coder.
///
private int[][] ctxtbufT;
/// boolean used to signal if the precinct partition is used for
/// each component and each tile.
///
private bool[][] precinctPartition;
//UPGRADE_NOTE: Field 'EnclosingInstance' was added to class 'Compressor' to access its enclosing instance. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1019'"
/// Class that takes care of running the 'compressCodeBlock()' method with
/// thread local arguments. Used only in multithreaded implementation.
///
///
private class Compressor : IThreadRunnable
{
private void InitBlock(StdEntropyCoder enclosingInstance)
{
this.enclosingInstance = enclosingInstance;
}
private StdEntropyCoder enclosingInstance;
/// Returns the index of this compressor.
///
///
/// The index of this compressor.
///
///
virtual public int Idx
{
get
{
return idx;
}
}
public StdEntropyCoder Enclosing_Instance
{
get
{
return enclosingInstance;
}
}
/// The index of this compressor. Used to access thread local
/// variables
///
//UPGRADE_NOTE: Final was removed from the declaration of 'idx '. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1003'"
private int idx;
/// The object where to store the compressed code-block
// Should be private, but some buggy JDK 1.1 compilers complain
internal CBlkRateDistStats ccb;
/// The component on which to compress
// Should be private, but some buggy JDK 1.1 compilers complain
internal int c;
/// The options bitmask to use in compression
// Should be private, but some buggy JDK 1.1 compilers complain
internal int options;
/// The reversible flag to use in compression
// Should be private, but some buggy JDK 1.1 compilers complain
internal bool rev;
/// The length calculation type to use in compression
// Should be private, but some buggy JDK 1.1 compilers complain
internal int lcType;
/// The MQ termination type to use in compression
// Should be private, but some buggy JDK 1.1 compilers complain
internal int tType;
/// The cumulative wall time for this compressor, for each
/// component.
///
//private long[] time;
/// Creates a new compressor object with the given index.
///
///
/// The index of this compressor.
///
///
internal Compressor(StdEntropyCoder enclosingInstance, int idx)
{
InitBlock(enclosingInstance);
this.idx = idx;
#if DO_TIMING
time = new long[Enclosing_Instance.src.NumComps];
#endif
}
/// Calls the 'compressCodeBlock()' method with thread local
/// arguments. Once completed it adds itself to the 'completedComps[c]'
/// stack, where 'c' is the component for which this compressor is
/// running. This last step occurs even if exceptions are thrown by the
/// 'compressCodeBlock()' method.
///
///
public virtual void Run()
{
// Start the code-block compression
try
{
#if DO_TIMING
long stime = 0L;
stime = (System.DateTime.Now.Ticks - 621355968000000000) / 10000;
#endif
CSJ2K.j2k.entropy.encoder.StdEntropyCoder.compressCodeBlock(c, ccb, Enclosing_Instance.srcblkT[idx], Enclosing_Instance.mqT[idx], Enclosing_Instance.boutT[idx], Enclosing_Instance.outT[idx], Enclosing_Instance.stateT[idx], Enclosing_Instance.distbufT[idx], Enclosing_Instance.ratebufT[idx], Enclosing_Instance.istermbufT[idx], Enclosing_Instance.symbufT[idx], Enclosing_Instance.ctxtbufT[idx], options, rev, lcType, tType);
#if DO_TIMING
time[c] += (System.DateTime.Now.Ticks - 621355968000000000) / 10000 - stime;
#endif
}
finally
{
// Join the queue of completed compression, even if exceptions
// occurred.
Enclosing_Instance.completedComps[c].Add(this);
}
}
}
/// Instantiates a new entropy coder engine, with the specified source of
/// data, nominal block width and height.
///
/// If the 'OPT_PRED_TERM' option is given then the MQ termination must
/// be 'TERM_PRED_ER' or an exception is thrown.
///
///
/// The source of data
///
///
/// Code-block size specifications
///
///
/// Precinct partition specifications
///
///
/// By-pass mode specifications
///
///
/// MQ-reset specifications
///
///
/// Regular termination specifications
///
///
/// Causal stripes specifications
///
///
/// Error resolution segment symbol use specifications
///
///
/// Length computation specifications
///
///
/// Termination type specifications
///
///
///
///
///
public StdEntropyCoder(CBlkQuantDataSrcEnc src, CBlkSizeSpec cblks, PrecinctSizeSpec pss, StringSpec bms, StringSpec mqrs, StringSpec rts, StringSpec css, StringSpec sss, StringSpec lcs, StringSpec tts):base(src)
{
this.cblks = cblks;
this.pss = pss;
this.bms = bms;
this.mqrs = mqrs;
this.rts = rts;
this.css = css;
this.sss = sss;
this.lcs = lcs;
this.tts = tts;
int maxCBlkWidth, maxCBlkHeight;
int i; // Counter
int nt; // The number of threads
int tsl; // Size for thread structures
// Get the biggest width/height for the code-blocks
maxCBlkWidth = cblks.MaxCBlkWidth;
maxCBlkHeight = cblks.MaxCBlkHeight;
nt = Environment.ProcessorCount;
/*
// Get the number of threads to use, or default to one
try
{
//UPGRADE_ISSUE: Method 'java.lang.System.getProperty' was not converted. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1000_javalangSystem'"
nt = System.Int32.Parse(System_Renamed.getProperty(THREADS_PROP_NAME, DEF_THREADS_NUM));
if (nt < 0)
throw new System.FormatException();
}
catch (System.FormatException e)
{
throw new System.ArgumentException("Invalid number of threads " + "for " + "entropy coding in property " + THREADS_PROP_NAME);
}
*/
// If we do timing create necessary structures
#if DO_TIMING
time = new long[src.NumComps];
// If we are timing make sure that 'finalize' gets called.
//UPGRADE_ISSUE: Method 'java.lang.System.runFinalizersOnExit' was not converted. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1000_javalangSystem'"
// CONVERSION PROBLEM?
//System_Renamed.runFinalizersOnExit(true);
#endif
// If using multithreaded implementation get necessasry objects
if (nt > 0)
{
FacilityManager.getMsgLogger().printmsg(CSJ2K.j2k.util.MsgLogger_Fields.INFO, "Using multithreaded entropy coder " + "with " + nt + " compressor threads.");
tsl = nt;
tPool = new ThreadPool(nt, (System.Int32) SupportClass.ThreadClass.Current().Priority + THREADS_PRIORITY_INC, "StdEntropyCoder");
idleComps = new System.Collections.ArrayList();
completedComps = new System.Collections.ArrayList[src.NumComps];
nBusyComps = new int[src.NumComps];
finishedTileComponent = new bool[src.NumComps];
for (i = src.NumComps - 1; i >= 0; i--)
{
completedComps[i] = new System.Collections.ArrayList();
}
for (i = 0; i < nt; i++)
{
idleComps.Add(new StdEntropyCoder.Compressor(this, i));
}
}
else
{
tsl = 1;
tPool = null;
idleComps = null;
completedComps = null;
nBusyComps = null;
finishedTileComponent = null;
}
// Allocate data structures
outT = new ByteOutputBuffer[tsl];
mqT = new MQCoder[tsl];
boutT = new BitToByteOutput[tsl];
stateT = new int[tsl][];
for (int i2 = 0; i2 < tsl; i2++)
{
stateT[i2] = new int[(maxCBlkWidth + 2) * ((maxCBlkHeight + 1) / 2 + 2)];
}
symbufT = new int[tsl][];
for (int i3 = 0; i3 < tsl; i3++)
{
symbufT[i3] = new int[maxCBlkWidth * (CSJ2K.j2k.entropy.StdEntropyCoderOptions.STRIPE_HEIGHT * 2 + 2)];
}
ctxtbufT = new int[tsl][];
for (int i4 = 0; i4 < tsl; i4++)
{
ctxtbufT[i4] = new int[maxCBlkWidth * (CSJ2K.j2k.entropy.StdEntropyCoderOptions.STRIPE_HEIGHT * 2 + 2)];
}
distbufT = new double[tsl][];
for (int i5 = 0; i5 < tsl; i5++)
{
distbufT[i5] = new double[32 * CSJ2K.j2k.entropy.StdEntropyCoderOptions.NUM_PASSES];
}
ratebufT = new int[tsl][];
for (int i6 = 0; i6 < tsl; i6++)
{
ratebufT[i6] = new int[32 * CSJ2K.j2k.entropy.StdEntropyCoderOptions.NUM_PASSES];
}
istermbufT = new bool[tsl][];
for (int i7 = 0; i7 < tsl; i7++)
{
istermbufT[i7] = new bool[32 * CSJ2K.j2k.entropy.StdEntropyCoderOptions.NUM_PASSES];
}
srcblkT = new CBlkWTData[tsl];
for (i = 0; i < tsl; i++)
{
outT[i] = new ByteOutputBuffer();
mqT[i] = new MQCoder(outT[i], NUM_CTXTS, MQ_INIT);
}
precinctPartition = new bool[src.NumComps][];
for (int i8 = 0; i8 < src.NumComps; i8++)
{
precinctPartition[i8] = new bool[src.getNumTiles()];
}
// Create the subband description for each component and each tile
//Subband sb = null;
Coord numTiles = null;
int nc = NumComps;
numTiles = src.getNumTiles(numTiles);
initTileComp(getNumTiles(), nc);
for (int c = 0; c < nc; c++)
{
for (int tY = 0; tY < numTiles.y; tY++)
{
for (int tX = 0; tX < numTiles.x; tX++)
{
precinctPartition[c][tIdx] = false;
}
}
}
}
#if DO_TIMING
/// Prints the timing information, if collected, and calls 'finalize' on
/// the super class.
///
///
~StdEntropyCoder()
{
int c;
System.Text.StringBuilder sb;
if (tPool == null)
{
// Single threaded implementation
sb = new System.Text.StringBuilder("StdEntropyCoder compression wall " + "clock time:");
for (c = 0; c < time.Length; c++)
{
sb.Append("\n component ");
sb.Append(c);
sb.Append(": ");
sb.Append(time[c]);
sb.Append(" ms");
}
FacilityManager.getMsgLogger().printmsg(CSJ2K.j2k.util.MsgLogger_Fields.INFO, sb.ToString());
}
else
{
// Multithreaded implementation
Compressor compr;
MsgLogger msglog = FacilityManager.getMsgLogger();
sb = new System.Text.StringBuilder("StdEntropyCoder manager thread " + "wall clock time:");
for (c = 0; c < time.Length; c++)
{
sb.Append("\n component ");
sb.Append(c);
sb.Append(": ");
sb.Append(time[c]);
sb.Append(" ms");
}
System.Collections.IEnumerator Enum = idleComps.GetEnumerator();
sb.Append("\nStdEntropyCoder compressor threads wall clock " + "time:");
//UPGRADE_TODO: Method 'java.util.Enumeration.hasMoreElements' was converted to 'System.Collections.IEnumerator.MoveNext' which has a different behavior. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1073_javautilEnumerationhasMoreElements'"
while (Enum.MoveNext())
{
//UPGRADE_TODO: Method 'java.util.Enumeration.nextElement' was converted to 'System.Collections.IEnumerator.Current' which has a different behavior. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1073_javautilEnumerationnextElement'"
compr = (Compressor)(Enum.Current);
for (c = 0; c < time.Length; c++)
{
sb.Append("\n compressor ");
sb.Append(compr.Idx);
sb.Append(", component ");
sb.Append(c);
sb.Append(": ");
sb.Append(compr.getTiming(c));
sb.Append(" ms");
}
}
FacilityManager.getMsgLogger().printmsg(CSJ2K.j2k.util.MsgLogger_Fields.INFO, sb.ToString());
}
//UPGRADE_NOTE: Call to 'super.finalize()' was removed. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1124'"
}
#endif
/// Returns the code-block width for the specified tile and component.
///
///
/// The tile index
///
///
/// the component index
///
///
/// The code-block width for the specified tile and component
///
///
public override int getCBlkWidth(int t, int c)
{
return cblks.getCBlkWidth(ModuleSpec.SPEC_TILE_COMP, t, c);
}
/// Returns the code-block height for the specified tile and component.
///
///
/// The tile index
///
///
/// The component index
///
///
/// The code-block height for the specified tile and component.
///
///
public override int getCBlkHeight(int t, int c)
{
return cblks.getCBlkHeight(ModuleSpec.SPEC_TILE_COMP, t, c);
}
/// Returns the next coded code-block in the current tile for the specified
/// component, as a copy (see below). The order in which code-blocks are
/// returned is not specified. However each code-block is returned only
/// once and all code-blocks will be returned if the method is called 'N'
/// times, where 'N' is the number of code-blocks in the tile. After all
/// the code-blocks have been returned for the current tile calls to this
/// method will return 'null'.
///
/// When changing the current tile (through 'setTile()' or 'nextTile()')
/// this method will always return the first code-block, as if this method
/// was never called before for the new current tile.
///
/// The data returned by this method is always a copy of the internal
/// data of this object, if any, and it can be modified "in place" without
/// any problems after being returned.
///
///
/// The component for which to return the next code-block.
///
///
/// If non-null this object might be used in returning the coded
/// code-block in this or any subsequent call to this method. If null a new
/// one is created and returned. If the 'data' array of 'cbb' is not null
/// it may be reused to return the compressed data.
///
///
/// The next coded code-block in the current tile for component
/// 'n', or null if all code-blocks for the current tile have been
/// returned.
///
///
///
///
///
public override CBlkRateDistStats getNextCodeBlock(int c, CBlkRateDistStats ccb)
{
#if DO_TIMING
long stime = 0L; // Start time for timed sections
#endif
if (tPool == null)
{
// Use single threaded implementation
// Get code-block data from source
srcblkT[0] = src.getNextInternCodeBlock(c, srcblkT[0]);
#if DO_TIMING
stime = (System.DateTime.Now.Ticks - 621355968000000000) / 10000;
#endif
if (srcblkT[0] == null)
{
// We got all code-blocks
return null;
}
// Initialize thread local variables
if ((opts[tIdx][c] & CSJ2K.j2k.entropy.StdEntropyCoderOptions.OPT_BYPASS) != 0 && boutT[0] == null)
{
boutT[0] = new BitToByteOutput(outT[0]);
}
// Initialize output code-block
if (ccb == null)
{
ccb = new CBlkRateDistStats();
}
// Compress code-block
compressCodeBlock(c, ccb, srcblkT[0], mqT[0], boutT[0], outT[0], stateT[0], distbufT[0], ratebufT[0], istermbufT[0], symbufT[0], ctxtbufT[0], opts[tIdx][c], isReversible(tIdx, c), lenCalc[tIdx][c], tType[tIdx][c]);
#if DO_TIMING
time[c] += (System.DateTime.Now.Ticks - 621355968000000000) / 10000 - stime;
#endif
// Return result
return ccb;
}
else
{
// Use multiple threaded implementation
int cIdx; // Compressor idx
Compressor compr; // Compressor
#if DO_TIMING
stime = (System.DateTime.Now.Ticks - 621355968000000000) / 10000;
#endif
// Give data to all free compressors, using the current component
while (!finishedTileComponent[c] && !(idleComps.Count == 0))
{
// Get an idle compressor
compr = (Compressor) SupportClass.StackSupport.Pop(idleComps);
cIdx = compr.Idx;
// Get data for the compressor and wake it up
#if DO_TIMING
time[c] += (System.DateTime.Now.Ticks - 621355968000000000) / 10000 - stime;
#endif
srcblkT[cIdx] = src.getNextInternCodeBlock(c, srcblkT[cIdx]);
#if DO_TIMING
stime = (System.DateTime.Now.Ticks - 621355968000000000) / 10000;
#endif
if (srcblkT[cIdx] != null)
{
// Initialize thread local variables
if ((opts[tIdx][c] & CSJ2K.j2k.entropy.StdEntropyCoderOptions.OPT_BYPASS) != 0 && boutT[cIdx] == null)
{
boutT[cIdx] = new BitToByteOutput(outT[cIdx]);
}
// Initialize output code-block and compressor thread
if (ccb == null)
ccb = new CBlkRateDistStats();
compr.ccb = ccb;
compr.c = c;
compr.options = opts[tIdx][c];
compr.rev = isReversible(tIdx, c);
compr.lcType = lenCalc[tIdx][c];
compr.tType = tType[tIdx][c];
nBusyComps[c]++;
ccb = null;
// Send compressor to execution in thread pool
tPool.runTarget(compr, completedComps[c]);
}
else
{
// We finished with all the code-blocks in the current
// tile component
idleComps.Add(compr);
finishedTileComponent[c] = true;
}
}
// If there are threads for this component which result has not
// been returned yet, get it
if (nBusyComps[c] > 0)
{
lock (completedComps[c])
{
// If no compressor is done, wait until one is
if ((completedComps[c].Count == 0))
{
try
{
#if DO_TIMING
time[c] += (System.DateTime.Now.Ticks - 621355968000000000) / 10000 - stime;
#endif
System.Threading.Monitor.Wait(completedComps[c]);
#if DO_TIMING
stime = (System.DateTime.Now.Ticks - 621355968000000000) / 10000;
#endif
}
catch (System.Threading.ThreadInterruptedException)
{
}
}
// Remove the thread from the completed queue and put it
// on the idle queue
compr = (Compressor) SupportClass.StackSupport.Pop(completedComps[c]);
cIdx = compr.Idx;
nBusyComps[c]--;
idleComps.Add(compr);
// Check targets error condition
tPool.checkTargetErrors();
// Get the result of compression and return that.
#if DO_TIMING
time[c] += (System.DateTime.Now.Ticks - 621355968000000000) / 10000 - stime;
#endif
return compr.ccb;
}
}
else
{
// Check targets error condition
tPool.checkTargetErrors();
// Printing timing info if necessary
#if DO_TIMING
time[c] += (System.DateTime.Now.Ticks - 621355968000000000) / 10000 - stime;
#endif
// Nothing is running => no more code-blocks
return null;
}
}
}
/// Changes the current tile, given the new indexes. An
/// IllegalArgumentException is thrown if the indexes do not correspond to
/// a valid tile.
///
/// This default implementation just changes the tile in the source.
///
///
/// The horizontal index of the tile.
///
///
/// The vertical index of the new tile.
///
///
public override void setTile(int x, int y)
{
base.setTile(x, y);
// Reset the tile specific variables
if (finishedTileComponent != null)
{
for (int c = src.NumComps - 1; c >= 0; c--)
{
finishedTileComponent[c] = false;
}
}
}
/// Advances to the next tile, in standard scan-line order (by rows then
/// columns). An NoNextElementException is thrown if the current tile is
/// the last one (i.e. there is no next tile).
///
/// This default implementation just advances to the next tile in the
/// source.
///
///
public override void nextTile()
{
// Reset the tilespecific variables
if (finishedTileComponent != null)
{
for (int c = src.NumComps - 1; c >= 0; c--)
{
finishedTileComponent[c] = false;
}
}
base.nextTile();
}
/// Compresses the code-block in 'srcblk' and puts the results in 'ccb',
/// using the specified options and temporary storage.
///
///
/// The component for which to return the next code-block.
///
///
/// The object where the compressed data will be stored. If the
/// 'data' array of 'cbb' is not null it may be reused to return the
/// compressed data.
///
///
/// The code-block data to code
///
///
/// The MQ-coder to use
///
///
/// The bit level output to use. Used only if 'OPT_BYPASS' is
/// turned on in the 'options' argument.
///
///
/// The byte buffer trough which the compressed data is stored.
///
///
/// The state information for the code-block
///
///
/// The buffer where to store the distortion at
/// the end of each coding pass.
///
///
/// The buffer where to store the rate (i.e. coded lenth) at
/// the end of each coding pass.
///
///
/// The buffer where to store the terminated flag for each
/// coding pass.
///
///
/// The buffer to hold symbols to send to the MQ coder
///
///
/// A buffer to hold the contexts to use in sending the
/// buffered symbols to the MQ coder.
///
///
/// The options to use when coding this code-block
///
///
/// The reversible flag. Should be true if the source of this
/// code-block's data is reversible.
///
///
/// The type of length calculation to use with the MQ coder.
///
///
/// The type of termination to use with the MQ coder.
///
///
///
///
///
static private void compressCodeBlock(int c, CBlkRateDistStats ccb, CBlkWTData srcblk, MQCoder mq, BitToByteOutput bout, ByteOutputBuffer out_Renamed, int[] state, double[] distbuf, int[] ratebuf, bool[] istermbuf, int[] symbuf, int[] ctxtbuf, int options, bool rev, int lcType, int tType)
{
// NOTE: This method should not access any non-final instance or
// static variables, either directly or indirectly through other
// methods in order to be sure that the method is thread safe.
int[] zc_lut; // The ZC lookup table to use
int skipbp; // The number of non-significant bit-planes to skip
int curbp; // The current magnitude bit-plane (starts at 30)
int[] fm; // The distortion estimation lookup table for MR
int[] fs; // The distortion estimation lookup table for SC
int lmb; // The least significant magnitude bit
int npass; // The number of coding passes, for R-D statistics
double msew; // The distortion (MSE weight) for the current bit-plane
double totdist; // The total cumulative distortion decrease
int ltpidx; // The index of the last pass which is terminated
// Check error-resilient termination
if ((options & CSJ2K.j2k.entropy.StdEntropyCoderOptions.OPT_PRED_TERM) != 0 && tType != MQCoder.TERM_PRED_ER)
{
throw new System.ArgumentException("Embedded error-resilient info " + "in MQ termination option " + "specified but incorrect MQ " + "termination " + "policy specified");
}
// Set MQ flags
mq.LenCalcType = lcType;
mq.TermType = tType;
lmb = 30 - srcblk.magbits + 1;
// If there are more bit-planes to code than the implementation
// bit-depth set lmb to 0
lmb = (lmb < 0)?0:lmb;
// Reset state
ArrayUtil.intArraySet(state, 0);
// Find the most significant bit-plane
skipbp = calcSkipMSBP(srcblk, lmb);
// Initialize output code-block
ccb.m = srcblk.m;
ccb.n = srcblk.n;
ccb.sb = srcblk.sb;
ccb.nROIcoeff = srcblk.nROIcoeff;
ccb.skipMSBP = skipbp;
if (ccb.nROIcoeff != 0)
{
ccb.nROIcp = 3 * (srcblk.nROIbp - skipbp - 1) + 1;
}
else
{
ccb.nROIcp = 0;
}
// Choose correct ZC lookup table for global orientation
switch (srcblk.sb.orientation)
{
case Subband.WT_ORIENT_HL:
zc_lut = ZC_LUT_HL;
break;
case Subband.WT_ORIENT_LL:
case Subband.WT_ORIENT_LH:
zc_lut = ZC_LUT_LH;
break;
case Subband.WT_ORIENT_HH:
zc_lut = ZC_LUT_HH;
break;
default:
throw new System.ApplicationException("JJ2000 internal error");
}
// Loop on significant magnitude bit-planes doing the 3 passes
curbp = 30 - skipbp;
fs = FS_LOSSY;
fm = FM_LOSSY;
msew = System.Math.Pow(2, ((curbp - lmb) << 1) - MSE_LKP_FRAC_BITS) * srcblk.sb.stepWMSE * srcblk.wmseScaling;
totdist = 0f;
npass = 0;
ltpidx = - 1;
// First significant bit-plane has only the pass pass
if (curbp >= lmb)
{
// Do we need the "lossless" 'fs' table ?
if (rev && curbp == lmb)
{
fs = FM_LOSSLESS;
}
// We terminate if regular termination, last bit-plane, or next
// bit-plane is "raw".
istermbuf[npass] = (options & CSJ2K.j2k.entropy.StdEntropyCoderOptions.OPT_TERM_PASS) != 0 || curbp == lmb || ((options & CSJ2K.j2k.entropy.StdEntropyCoderOptions.OPT_BYPASS) != 0 && (31 - CSJ2K.j2k.entropy.StdEntropyCoderOptions.NUM_NON_BYPASS_MS_BP - skipbp) >= curbp);
totdist += cleanuppass(srcblk, mq, istermbuf[npass], curbp, state, fs, zc_lut, symbuf, ctxtbuf, ratebuf, npass, ltpidx, options) * msew;
distbuf[npass] = totdist;
if (istermbuf[npass])
ltpidx = npass;
npass++;
msew *= 0.25;
curbp--;
}
// Other bit-planes have all passes
while (curbp >= lmb)
{
// Do we need the "lossless" 'fs' and 'fm' tables ?
if (rev && curbp == lmb)
{
fs = FS_LOSSLESS;
fm = FM_LOSSLESS;
}
// Do the significance propagation pass
// We terminate if regular termination only
istermbuf[npass] = (options & CSJ2K.j2k.entropy.StdEntropyCoderOptions.OPT_TERM_PASS) != 0;
if ((options & CSJ2K.j2k.entropy.StdEntropyCoderOptions.OPT_BYPASS) == 0 || (31 - CSJ2K.j2k.entropy.StdEntropyCoderOptions.NUM_NON_BYPASS_MS_BP - skipbp <= curbp))
{
// No bypass coding
totdist += sigProgPass(srcblk, mq, istermbuf[npass], curbp, state, fs, zc_lut, symbuf, ctxtbuf, ratebuf, npass, ltpidx, options) * msew;
}
else
{
// Bypass ("raw") coding
bout.PredTerm = (options & CSJ2K.j2k.entropy.StdEntropyCoderOptions.OPT_PRED_TERM) != 0;
totdist += rawSigProgPass(srcblk, bout, istermbuf[npass], curbp, state, fs, ratebuf, npass, ltpidx, options) * msew;
}
distbuf[npass] = totdist;
if (istermbuf[npass])
ltpidx = npass;
npass++;
// Do the magnitude refinement pass
// We terminate if regular termination or bypass ("raw") coding
istermbuf[npass] = (options & CSJ2K.j2k.entropy.StdEntropyCoderOptions.OPT_TERM_PASS) != 0 || ((options & CSJ2K.j2k.entropy.StdEntropyCoderOptions.OPT_BYPASS) != 0 && (31 - CSJ2K.j2k.entropy.StdEntropyCoderOptions.NUM_NON_BYPASS_MS_BP - skipbp > curbp));
if ((options & CSJ2K.j2k.entropy.StdEntropyCoderOptions.OPT_BYPASS) == 0 || (31 - CSJ2K.j2k.entropy.StdEntropyCoderOptions.NUM_NON_BYPASS_MS_BP - skipbp <= curbp))
{
// No bypass coding
totdist += magRefPass(srcblk, mq, istermbuf[npass], curbp, state, fm, symbuf, ctxtbuf, ratebuf, npass, ltpidx, options) * msew;
}
else
{
// Bypass ("raw") coding
bout.PredTerm = (options & CSJ2K.j2k.entropy.StdEntropyCoderOptions.OPT_PRED_TERM) != 0;
totdist += rawMagRefPass(srcblk, bout, istermbuf[npass], curbp, state, fm, ratebuf, npass, ltpidx, options) * msew;
}
distbuf[npass] = totdist;
if (istermbuf[npass])
ltpidx = npass;
npass++;
// Do the clenup pass
// We terminate if regular termination, last bit-plane, or next
// bit-plane is "raw".
istermbuf[npass] = (options & CSJ2K.j2k.entropy.StdEntropyCoderOptions.OPT_TERM_PASS) != 0 || curbp == lmb || ((options & CSJ2K.j2k.entropy.StdEntropyCoderOptions.OPT_BYPASS) != 0 && (31 - CSJ2K.j2k.entropy.StdEntropyCoderOptions.NUM_NON_BYPASS_MS_BP - skipbp) >= curbp);
totdist += cleanuppass(srcblk, mq, istermbuf[npass], curbp, state, fs, zc_lut, symbuf, ctxtbuf, ratebuf, npass, ltpidx, options) * msew;
distbuf[npass] = totdist;
if (istermbuf[npass])
ltpidx = npass;
npass++;
// Goto next bit-plane
msew *= 0.25;
curbp--;
}
// Copy compressed data and rate-distortion statistics to output
ccb.data = new byte[out_Renamed.size()];
out_Renamed.toByteArray(0, out_Renamed.size(), ccb.data, 0);
checkEndOfPassFF(ccb.data, ratebuf, istermbuf, npass);
ccb.selectConvexHull(ratebuf, distbuf, (options & (CSJ2K.j2k.entropy.StdEntropyCoderOptions.OPT_BYPASS | CSJ2K.j2k.entropy.StdEntropyCoderOptions.OPT_TERM_PASS)) != 0?istermbuf:null, npass, rev);
// Reset MQ coder and bit output for next code-block
mq.reset();
if (bout != null)
bout.reset();
}
/// Calculates the number of magnitude bit-planes that are to be skipped,
/// because they are non-significant. The algorithm looks for the largest
/// magnitude and calculates the most significant bit-plane of it.
///
///
/// The code-block of data to scan
///
///
/// The least significant magnitude bit in the data
///
///
/// The number of magnitude bit-planes to skip (i.e. all zero most
/// significant bit-planes).
///
///
static private int calcSkipMSBP(CBlkWTData cblk, int lmb)
{
int k, kmax, mask;
int[] data;
int maxmag;
int mag;
int w, h;
int msbp;
int l;
data = (int[]) cblk.Data;
w = cblk.w;
h = cblk.h;
// First look for the maximum magnitude in the code-block
maxmag = 0;
// Consider only magnitude bits that are in non-fractional bit-planes.
mask = 0x7FFFFFFF & (~ ((1 << lmb) - 1));
for (l = h - 1, k = cblk.offset; l >= 0; l--)
{
for (kmax = k + w; k < kmax; k++)
{
mag = data[k] & mask;
if (mag > maxmag)
maxmag = mag;
}
k += cblk.scanw - w;
}
// Now calculate the number of all zero most significant
// bit-planes for the maximum magnitude.
msbp = 30;
do
{
if (((1 << msbp) & maxmag) != 0)
break;
msbp--;
}
while (msbp >= lmb);
// Return the number of non-significant bit-planes to skip
return 30 - msbp;
}
/// Performs the significance propagation pass on the specified data and
/// bit-plane. It codes all insignificant samples which have, at least, one
/// of its immediate eight neighbors already significant, using the ZC and
/// SC primitives as needed. It toggles the "visited" state bit to 1 for
/// all those samples.
///
///
/// The code-block data to code
///
///
/// The MQ-coder to use
///
///
/// If true it performs an MQ-coder termination after the end
/// of the pass
///
///
/// The bit-plane to code
///
///
/// The state information for the code-block
///
///
/// The distortion estimation lookup table for SC
///
///
/// The ZC lookup table to use in ZC.
///
///
/// The buffer to hold symbols to send to the MQ coder
///
///
/// A buffer to hold the contexts to use in sending the
/// buffered symbols to the MQ coder.
///
///
/// The buffer where to store the rate (i.e. coded lenth) at
/// the end of this coding pass.
///
///
/// The coding pass index. Is the index in the 'ratebuf' array
/// where to store the coded length after this coding pass.
///
///
/// The index of the last pass that was terminated, or
/// negative if none.
///
///
/// The bitmask of entropy coding options to apply to the
/// code-block
///
///
/// The decrease in distortion for this pass, in the fixed-point
/// normalized representation of the 'FS_LOSSY' and 'FS_LOSSLESS' tables.
///
///
static private int sigProgPass(CBlkWTData srcblk, MQCoder mq, bool doterm, int bp, int[] state, int[] fs, int[] zc_lut, int[] symbuf, int[] ctxtbuf, int[] ratebuf, int pidx, int ltpidx, int options)
{
int j, sj; // The state index for line and stripe
int k, sk; // The data index for line and stripe
int nsym = 0; // Symbol counter for symbol and context buffers
int dscanw; // The data scan-width
int sscanw; // The state and packed state scan-width
int jstep; // Stripe to stripe step for 'sj'
int kstep; // Stripe to stripe step for 'sk'
int stopsk; // The loop limit on the variable sk
int csj; // Local copy (i.e. cached) of 'state[j]'
int mask; // The mask for the current bit-plane
int sym; // The symbol to code
int ctxt; // The context to use
int[] data; // The data buffer
int dist; // The distortion reduction for this pass
int shift; // Shift amount for distortion
int upshift; // Shift left amount for distortion
int downshift; // Shift right amount for distortion
int normval; // The normalized sample magnitude value
int s; // The stripe index
bool causal; // Flag to indicate if stripe-causal context
// formation is to be used
int nstripes; // The number of stripes in the code-block
int sheight; // Height of the current stripe
int off_ul, off_ur, off_dr, off_dl; // offsets
// Initialize local variables
dscanw = srcblk.scanw;
sscanw = srcblk.w + 2;
jstep = sscanw * CSJ2K.j2k.entropy.StdEntropyCoderOptions.STRIPE_HEIGHT / 2 - srcblk.w;
kstep = dscanw * CSJ2K.j2k.entropy.StdEntropyCoderOptions.STRIPE_HEIGHT - srcblk.w;
mask = 1 << bp;
data = (int[]) srcblk.Data;
nstripes = (srcblk.h + CSJ2K.j2k.entropy.StdEntropyCoderOptions.STRIPE_HEIGHT - 1) / CSJ2K.j2k.entropy.StdEntropyCoderOptions.STRIPE_HEIGHT;
dist = 0;
// We use the MSE_LKP_BITS-1 bits below the bit just coded for
// distortion estimation.
shift = bp - MSE_LKP_BITS_M1;
upshift = (shift >= 0)?0:- shift;
downshift = (shift <= 0)?0:shift;
causal = (options & CSJ2K.j2k.entropy.StdEntropyCoderOptions.OPT_VERT_STR_CAUSAL) != 0;
// Pre-calculate offsets in 'state' for diagonal neighbors
off_ul = - sscanw - 1; // up-left
off_ur = - sscanw + 1; // up-right
off_dr = sscanw + 1; // down-right
off_dl = sscanw - 1; // down-left
// Code stripe by stripe
sk = srcblk.offset;
sj = sscanw + 1;
for (s = nstripes - 1; s >= 0; s--, sk += kstep, sj += jstep)
{
sheight = (s != 0)?CSJ2K.j2k.entropy.StdEntropyCoderOptions.STRIPE_HEIGHT:srcblk.h - (nstripes - 1) * CSJ2K.j2k.entropy.StdEntropyCoderOptions.STRIPE_HEIGHT;
stopsk = sk + srcblk.w;
// Scan by set of 1 stripe column at a time
for (nsym = 0; sk < stopsk; sk++, sj++)
{
// Do half top of column
j = sj;
csj = state[j];
// If any of the two samples is not significant and has a
// non-zero context (i.e. some neighbor is significant) we can
// not skip them
if ((((~ csj) & (csj << 2)) & SIG_MASK_R1R2) != 0)
{
k = sk;
// Scan first row
if ((csj & (STATE_SIG_R1 | STATE_NZ_CTXT_R1)) == STATE_NZ_CTXT_R1)
{
// Apply zero coding
ctxtbuf[nsym] = zc_lut[csj & ZC_MASK];
if ((symbuf[nsym++] = SupportClass.URShift((data[k] & mask), bp)) != 0)
{
// Became significant
// Apply sign coding
sym = SupportClass.URShift(data[k], 31);
ctxt = SC_LUT[(SupportClass.URShift(csj, SC_SHIFT_R1)) & SC_MASK];
symbuf[nsym] = sym ^ (SupportClass.URShift(ctxt, SC_SPRED_SHIFT));
ctxtbuf[nsym++] = ctxt & SC_LUT_MASK;
// Update state information (significant bit,
// visited bit, neighbor significant bit of
// neighbors, non zero context of neighbors, sign
// of neighbors)
if (!causal)
{
// If in causal mode do not change contexts of
// previous stripe.
state[j + off_ul] |= STATE_NZ_CTXT_R2 | STATE_D_DR_R2;
state[j + off_ur] |= STATE_NZ_CTXT_R2 | STATE_D_DL_R2;
}
// Update sign state information of neighbors
if (sym != 0)
{
csj |= STATE_SIG_R1 | STATE_VISITED_R1 | STATE_NZ_CTXT_R2 | STATE_V_U_R2 | STATE_V_U_SIGN_R2;
if (!causal)
{
// If in causal mode do not change
// contexts of previous stripe.
state[j - sscanw] |= STATE_NZ_CTXT_R2 | STATE_V_D_R2 | STATE_V_D_SIGN_R2;
}
state[j + 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_H_L_R1 | STATE_H_L_SIGN_R1 | STATE_D_UL_R2;
state[j - 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_H_R_R1 | STATE_H_R_SIGN_R1 | STATE_D_UR_R2;
}
else
{
csj |= STATE_SIG_R1 | STATE_VISITED_R1 | STATE_NZ_CTXT_R2 | STATE_V_U_R2;
if (!causal)
{
// If in causal mode do not change
// contexts of previous stripe.
state[j - sscanw] |= STATE_NZ_CTXT_R2 | STATE_V_D_R2;
}
state[j + 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_H_L_R1 | STATE_D_UL_R2;
state[j - 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_H_R_R1 | STATE_D_UR_R2;
}
// Update distortion
normval = (data[k] >> downshift) << upshift;
dist += fs[normval & ((1 << MSE_LKP_BITS_M1) - 1)];
}
else
{
csj |= STATE_VISITED_R1;
}
}
if (sheight < 2)
{
state[j] = csj;
continue;
}
// Scan second row
if ((csj & (STATE_SIG_R2 | STATE_NZ_CTXT_R2)) == STATE_NZ_CTXT_R2)
{
k += dscanw;
// Apply zero coding
ctxtbuf[nsym] = zc_lut[(SupportClass.URShift(csj, STATE_SEP)) & ZC_MASK];
if ((symbuf[nsym++] = SupportClass.URShift((data[k] & mask), bp)) != 0)
{
// Became significant
// Apply sign coding
sym = SupportClass.URShift(data[k], 31);
ctxt = SC_LUT[(SupportClass.URShift(csj, SC_SHIFT_R2)) & SC_MASK];
symbuf[nsym] = sym ^ (SupportClass.URShift(ctxt, SC_SPRED_SHIFT));
ctxtbuf[nsym++] = ctxt & SC_LUT_MASK;
// Update state information (significant bit,
// visited bit, neighbor significant bit of
// neighbors, non zero context of neighbors, sign
// of neighbors)
state[j + off_dl] |= STATE_NZ_CTXT_R1 | STATE_D_UR_R1;
state[j + off_dr] |= STATE_NZ_CTXT_R1 | STATE_D_UL_R1;
// Update sign state information of neighbors
if (sym != 0)
{
csj |= STATE_SIG_R2 | STATE_VISITED_R2 | STATE_NZ_CTXT_R1 | STATE_V_D_R1 | STATE_V_D_SIGN_R1;
state[j + sscanw] |= STATE_NZ_CTXT_R1 | STATE_V_U_R1 | STATE_V_U_SIGN_R1;
state[j + 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_D_DL_R1 | STATE_H_L_R2 | STATE_H_L_SIGN_R2;
state[j - 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_D_DR_R1 | STATE_H_R_R2 | STATE_H_R_SIGN_R2;
}
else
{
csj |= STATE_SIG_R2 | STATE_VISITED_R2 | STATE_NZ_CTXT_R1 | STATE_V_D_R1;
state[j + sscanw] |= STATE_NZ_CTXT_R1 | STATE_V_U_R1;
state[j + 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_D_DL_R1 | STATE_H_L_R2;
state[j - 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_D_DR_R1 | STATE_H_R_R2;
}
// Update distortion
normval = (data[k] >> downshift) << upshift;
dist += fs[normval & ((1 << MSE_LKP_BITS_M1) - 1)];
}
else
{
csj |= STATE_VISITED_R2;
}
}
state[j] = csj;
}
// Do half bottom of column
if (sheight < 3)
continue;
j += sscanw;
csj = state[j];
// If any of the two samples is not significant and has a
// non-zero context (i.e. some neighbor is significant) we can
// not skip them
if ((((~ csj) & (csj << 2)) & SIG_MASK_R1R2) != 0)
{
k = sk + (dscanw << 1);
// Scan first row
if ((csj & (STATE_SIG_R1 | STATE_NZ_CTXT_R1)) == STATE_NZ_CTXT_R1)
{
// Apply zero coding
ctxtbuf[nsym] = zc_lut[csj & ZC_MASK];
if ((symbuf[nsym++] = SupportClass.URShift((data[k] & mask), bp)) != 0)
{
// Became significant
// Apply sign coding
sym = SupportClass.URShift(data[k], 31);
ctxt = SC_LUT[(SupportClass.URShift(csj, SC_SHIFT_R1)) & SC_MASK];
symbuf[nsym] = sym ^ (SupportClass.URShift(ctxt, SC_SPRED_SHIFT));
ctxtbuf[nsym++] = ctxt & SC_LUT_MASK;
// Update state information (significant bit,
// visited bit, neighbor significant bit of
// neighbors, non zero context of neighbors, sign
// of neighbors)
state[j + off_ul] |= STATE_NZ_CTXT_R2 | STATE_D_DR_R2;
state[j + off_ur] |= STATE_NZ_CTXT_R2 | STATE_D_DL_R2;
// Update sign state information of neighbors
if (sym != 0)
{
csj |= STATE_SIG_R1 | STATE_VISITED_R1 | STATE_NZ_CTXT_R2 | STATE_V_U_R2 | STATE_V_U_SIGN_R2;
state[j - sscanw] |= STATE_NZ_CTXT_R2 | STATE_V_D_R2 | STATE_V_D_SIGN_R2;
state[j + 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_H_L_R1 | STATE_H_L_SIGN_R1 | STATE_D_UL_R2;
state[j - 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_H_R_R1 | STATE_H_R_SIGN_R1 | STATE_D_UR_R2;
}
else
{
csj |= STATE_SIG_R1 | STATE_VISITED_R1 | STATE_NZ_CTXT_R2 | STATE_V_U_R2;
state[j - sscanw] |= STATE_NZ_CTXT_R2 | STATE_V_D_R2;
state[j + 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_H_L_R1 | STATE_D_UL_R2;
state[j - 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_H_R_R1 | STATE_D_UR_R2;
}
// Update distortion
normval = (data[k] >> downshift) << upshift;
dist += fs[normval & ((1 << MSE_LKP_BITS_M1) - 1)];
}
else
{
csj |= STATE_VISITED_R1;
}
}
if (sheight < 4)
{
state[j] = csj;
continue;
}
// Scan second row
if ((csj & (STATE_SIG_R2 | STATE_NZ_CTXT_R2)) == STATE_NZ_CTXT_R2)
{
k += dscanw;
// Apply zero coding
ctxtbuf[nsym] = zc_lut[(SupportClass.URShift(csj, STATE_SEP)) & ZC_MASK];
if ((symbuf[nsym++] = SupportClass.URShift((data[k] & mask), bp)) != 0)
{
// Became significant
// Apply sign coding
sym = SupportClass.URShift(data[k], 31);
ctxt = SC_LUT[(SupportClass.URShift(csj, SC_SHIFT_R2)) & SC_MASK];
symbuf[nsym] = sym ^ (SupportClass.URShift(ctxt, SC_SPRED_SHIFT));
ctxtbuf[nsym++] = ctxt & SC_LUT_MASK;
// Update state information (significant bit,
// visited bit, neighbor significant bit of
// neighbors, non zero context of neighbors, sign
// of neighbors)
state[j + off_dl] |= STATE_NZ_CTXT_R1 | STATE_D_UR_R1;
state[j + off_dr] |= STATE_NZ_CTXT_R1 | STATE_D_UL_R1;
// Update sign state information of neighbors
if (sym != 0)
{
csj |= STATE_SIG_R2 | STATE_VISITED_R2 | STATE_NZ_CTXT_R1 | STATE_V_D_R1 | STATE_V_D_SIGN_R1;
state[j + sscanw] |= STATE_NZ_CTXT_R1 | STATE_V_U_R1 | STATE_V_U_SIGN_R1;
state[j + 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_D_DL_R1 | STATE_H_L_R2 | STATE_H_L_SIGN_R2;
state[j - 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_D_DR_R1 | STATE_H_R_R2 | STATE_H_R_SIGN_R2;
}
else
{
csj |= STATE_SIG_R2 | STATE_VISITED_R2 | STATE_NZ_CTXT_R1 | STATE_V_D_R1;
state[j + sscanw] |= STATE_NZ_CTXT_R1 | STATE_V_U_R1;
state[j + 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_D_DL_R1 | STATE_H_L_R2;
state[j - 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_D_DR_R1 | STATE_H_R_R2;
}
// Update distortion
normval = (data[k] >> downshift) << upshift;
dist += fs[normval & ((1 << MSE_LKP_BITS_M1) - 1)];
}
else
{
csj |= STATE_VISITED_R2;
}
}
state[j] = csj;
}
}
// Code all buffered symbols
mq.codeSymbols(symbuf, ctxtbuf, nsym);
}
// Reset the MQ context states if we need to
if ((options & CSJ2K.j2k.entropy.StdEntropyCoderOptions.OPT_RESET_MQ) != 0)
{
mq.resetCtxts();
}
// Terminate the MQ bit stream if we need to
if (doterm)
{
ratebuf[pidx] = mq.terminate(); // Termination has special length
}
else
{
// Use normal length calculation
ratebuf[pidx] = mq.NumCodedBytes;
}
// Add length of previous segments, if any
if (ltpidx >= 0)
{
ratebuf[pidx] += ratebuf[ltpidx];
}
// Finish length calculation if needed
if (doterm)
{
mq.finishLengthCalculation(ratebuf, pidx);
}
// Return the reduction in distortion
return dist;
}
/// Performs the significance propagation pass on the specified data and
/// bit-plane, without using the arithmetic coder. It codes all
/// insignificant samples which have, at least, one of its immediate eight
/// neighbors already significant, using the ZC and SC primitives as
/// needed. It toggles the "visited" state bit to 1 for all those samples.
///
/// In this method, the arithmetic coder is bypassed, and raw bits are
/// directly written in the bit stream (useful when distribution are close
/// to uniform, for intance, at high bit-rates and at lossless
/// compression).
///
///
/// The code-block data to code
///
///
/// The bit based output
///
///
/// If true the bit based output is byte aligned after the
/// end of the pass.
///
///
/// The bit-plane to code
///
///
/// The state information for the code-block
///
///
/// The distortion estimation lookup table for SC
///
///
/// The buffer where to store the rate (i.e. coded lenth) at
/// the end of this coding pass.
///
///
/// The coding pass index. Is the index in the 'ratebuf' array
/// where to store the coded length after this coding pass.
///
///
/// The index of the last pass that was terminated, or
/// negative if none.
///
///
/// The bitmask of entropy coding options to apply to the
/// code-block
///
///
/// The decrease in distortion for this pass, in the fixed-point
/// normalized representation of the 'FS_LOSSY' and 'FS_LOSSLESS' tables.
///
///
static private int rawSigProgPass(CBlkWTData srcblk, BitToByteOutput bout, bool doterm, int bp, int[] state, int[] fs, int[] ratebuf, int pidx, int ltpidx, int options)
{
int j, sj; // The state index for line and stripe
int k, sk; // The data index for line and stripe
int dscanw; // The data scan-width
int sscanw; // The state scan-width
int jstep; // Stripe to stripe step for 'sj'
int kstep; // Stripe to stripe step for 'sk'
int stopsk; // The loop limit on the variable sk
int csj; // Local copy (i.e. cached) of 'state[j]'
int mask; // The mask for the current bit-plane
int nsym = 0; // Number of symbol
int sym; // The symbol to code
int[] data; // The data buffer
int dist; // The distortion reduction for this pass
int shift; // Shift amount for distortion
int upshift; // Shift left amount for distortion
int downshift; // Shift right amount for distortion
int normval; // The normalized sample magnitude value
int s; // The stripe index
bool causal; // Flag to indicate if stripe-causal context
// formation is to be used
int nstripes; // The number of stripes in the code-block
int sheight; // Height of the current stripe
int off_ul, off_ur, off_dr, off_dl; // offsets
// Initialize local variables
dscanw = srcblk.scanw;
sscanw = srcblk.w + 2;
jstep = sscanw * CSJ2K.j2k.entropy.StdEntropyCoderOptions.STRIPE_HEIGHT / 2 - srcblk.w;
kstep = dscanw * CSJ2K.j2k.entropy.StdEntropyCoderOptions.STRIPE_HEIGHT - srcblk.w;
mask = 1 << bp;
data = (int[]) srcblk.Data;
nstripes = (srcblk.h + CSJ2K.j2k.entropy.StdEntropyCoderOptions.STRIPE_HEIGHT - 1) / CSJ2K.j2k.entropy.StdEntropyCoderOptions.STRIPE_HEIGHT;
dist = 0;
// We use the MSE_LKP_BITS-1 bits below the bit just coded for
// distortion estimation.
shift = bp - MSE_LKP_BITS_M1;
upshift = (shift >= 0)?0:- shift;
downshift = (shift <= 0)?0:shift;
causal = (options & CSJ2K.j2k.entropy.StdEntropyCoderOptions.OPT_VERT_STR_CAUSAL) != 0;
// Pre-calculate offsets in 'state' for neighbors
off_ul = - sscanw - 1; // up-left
off_ur = - sscanw + 1; // up-right
off_dr = sscanw + 1; // down-right
off_dl = sscanw - 1; // down-left
// Code stripe by stripe
sk = srcblk.offset;
sj = sscanw + 1;
for (s = nstripes - 1; s >= 0; s--, sk += kstep, sj += jstep)
{
sheight = (s != 0)?CSJ2K.j2k.entropy.StdEntropyCoderOptions.STRIPE_HEIGHT:srcblk.h - (nstripes - 1) * CSJ2K.j2k.entropy.StdEntropyCoderOptions.STRIPE_HEIGHT;
stopsk = sk + srcblk.w;
// Scan by set of 1 stripe column at a time
for (; sk < stopsk; sk++, sj++)
{
// Do half top of column
j = sj;
csj = state[j];
// If any of the two samples is not significant and has a
// non-zero context (i.e. some neighbor is significant) we can
// not skip them
if ((((~ csj) & (csj << 2)) & SIG_MASK_R1R2) != 0)
{
k = sk;
// Scan first row
if ((csj & (STATE_SIG_R1 | STATE_NZ_CTXT_R1)) == STATE_NZ_CTXT_R1)
{
// Apply zero coding
sym = SupportClass.URShift((data[k] & mask), bp);
bout.writeBit(sym);
nsym++;
if (sym != 0)
{
// Became significant
// Apply sign coding
sym = SupportClass.URShift(data[k], 31);
bout.writeBit(sym);
nsym++;
// Update state information (significant bit,
// visited bit, neighbor significant bit of
// neighbors, non zero context of neighbors, sign
// of neighbors)
if (!causal)
{
// If in causal mode do not change contexts of
// previous stripe.
state[j + off_ul] |= STATE_NZ_CTXT_R2 | STATE_D_DR_R2;
state[j + off_ur] |= STATE_NZ_CTXT_R2 | STATE_D_DL_R2;
}
// Update sign state information of neighbors
if (sym != 0)
{
csj |= STATE_SIG_R1 | STATE_VISITED_R1 | STATE_NZ_CTXT_R2 | STATE_V_U_R2 | STATE_V_U_SIGN_R2;
if (!causal)
{
// If in causal mode do not change
// contexts of previous stripe.
state[j - sscanw] |= STATE_NZ_CTXT_R2 | STATE_V_D_R2 | STATE_V_D_SIGN_R2;
}
state[j + 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_H_L_R1 | STATE_H_L_SIGN_R1 | STATE_D_UL_R2;
state[j - 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_H_R_R1 | STATE_H_R_SIGN_R1 | STATE_D_UR_R2;
}
else
{
csj |= STATE_SIG_R1 | STATE_VISITED_R1 | STATE_NZ_CTXT_R2 | STATE_V_U_R2;
if (!causal)
{
// If in causal mode do not change
// contexts of previous stripe.
state[j - sscanw] |= STATE_NZ_CTXT_R2 | STATE_V_D_R2;
}
state[j + 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_H_L_R1 | STATE_D_UL_R2;
state[j - 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_H_R_R1 | STATE_D_UR_R2;
}
// Update distortion
normval = (data[k] >> downshift) << upshift;
dist += fs[normval & ((1 << MSE_LKP_BITS_M1) - 1)];
}
else
{
csj |= STATE_VISITED_R1;
}
}
if (sheight < 2)
{
state[j] = csj;
continue;
}
// Scan second row
if ((csj & (STATE_SIG_R2 | STATE_NZ_CTXT_R2)) == STATE_NZ_CTXT_R2)
{
k += dscanw;
// Apply zero coding
sym = SupportClass.URShift((data[k] & mask), bp);
bout.writeBit(sym);
nsym++;
if (sym != 0)
{
// Became significant
// Apply sign coding
sym = SupportClass.URShift(data[k], 31);
bout.writeBit(sym);
nsym++;
// Update state information (significant bit,
// visited bit, neighbor significant bit of
// neighbors, non zero context of neighbors, sign
// of neighbors)
state[j + off_dl] |= STATE_NZ_CTXT_R1 | STATE_D_UR_R1;
state[j + off_dr] |= STATE_NZ_CTXT_R1 | STATE_D_UL_R1;
// Update sign state information of neighbors
if (sym != 0)
{
csj |= STATE_SIG_R2 | STATE_VISITED_R2 | STATE_NZ_CTXT_R1 | STATE_V_D_R1 | STATE_V_D_SIGN_R1;
state[j + sscanw] |= STATE_NZ_CTXT_R1 | STATE_V_U_R1 | STATE_V_U_SIGN_R1;
state[j + 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_D_DL_R1 | STATE_H_L_R2 | STATE_H_L_SIGN_R2;
state[j - 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_D_DR_R1 | STATE_H_R_R2 | STATE_H_R_SIGN_R2;
}
else
{
csj |= STATE_SIG_R2 | STATE_VISITED_R2 | STATE_NZ_CTXT_R1 | STATE_V_D_R1;
state[j + sscanw] |= STATE_NZ_CTXT_R1 | STATE_V_U_R1;
state[j + 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_D_DL_R1 | STATE_H_L_R2;
state[j - 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_D_DR_R1 | STATE_H_R_R2;
}
// Update distortion
normval = (data[k] >> downshift) << upshift;
dist += fs[normval & ((1 << MSE_LKP_BITS_M1) - 1)];
}
else
{
csj |= STATE_VISITED_R2;
}
}
state[j] = csj;
}
// Do half bottom of column
if (sheight < 3)
continue;
j += sscanw;
csj = state[j];
// If any of the two samples is not significant and has a
// non-zero context (i.e. some neighbor is significant) we can
// not skip them
if ((((~ csj) & (csj << 2)) & SIG_MASK_R1R2) != 0)
{
k = sk + (dscanw << 1);
// Scan first row
if ((csj & (STATE_SIG_R1 | STATE_NZ_CTXT_R1)) == STATE_NZ_CTXT_R1)
{
sym = SupportClass.URShift((data[k] & mask), bp);
bout.writeBit(sym);
nsym++;
if (sym != 0)
{
// Became significant
// Apply sign coding
sym = SupportClass.URShift(data[k], 31);
bout.writeBit(sym);
nsym++;
// Update state information (significant bit,
// visited bit, neighbor significant bit of
// neighbors, non zero context of neighbors, sign
// of neighbors)
state[j + off_ul] |= STATE_NZ_CTXT_R2 | STATE_D_DR_R2;
state[j + off_ur] |= STATE_NZ_CTXT_R2 | STATE_D_DL_R2;
// Update sign state information of neighbors
if (sym != 0)
{
csj |= STATE_SIG_R1 | STATE_VISITED_R1 | STATE_NZ_CTXT_R2 | STATE_V_U_R2 | STATE_V_U_SIGN_R2;
state[j - sscanw] |= STATE_NZ_CTXT_R2 | STATE_V_D_R2 | STATE_V_D_SIGN_R2;
state[j + 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_H_L_R1 | STATE_H_L_SIGN_R1 | STATE_D_UL_R2;
state[j - 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_H_R_R1 | STATE_H_R_SIGN_R1 | STATE_D_UR_R2;
}
else
{
csj |= STATE_SIG_R1 | STATE_VISITED_R1 | STATE_NZ_CTXT_R2 | STATE_V_U_R2;
state[j - sscanw] |= STATE_NZ_CTXT_R2 | STATE_V_D_R2;
state[j + 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_H_L_R1 | STATE_D_UL_R2;
state[j - 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_H_R_R1 | STATE_D_UR_R2;
}
// Update distortion
normval = (data[k] >> downshift) << upshift;
dist += fs[normval & ((1 << MSE_LKP_BITS_M1) - 1)];
}
else
{
csj |= STATE_VISITED_R1;
}
}
if (sheight < 4)
{
state[j] = csj;
continue;
}
if ((csj & (STATE_SIG_R2 | STATE_NZ_CTXT_R2)) == STATE_NZ_CTXT_R2)
{
k += dscanw;
// Apply zero coding
sym = SupportClass.URShift((data[k] & mask), bp);
bout.writeBit(sym);
nsym++;
if (sym != 0)
{
// Became significant
// Apply sign coding
sym = SupportClass.URShift(data[k], 31);
bout.writeBit(sym);
nsym++;
// Update state information (significant bit,
// visited bit, neighbor significant bit of
// neighbors, non zero context of neighbors, sign
// of neighbors)
state[j + off_dl] |= STATE_NZ_CTXT_R1 | STATE_D_UR_R1;
state[j + off_dr] |= STATE_NZ_CTXT_R1 | STATE_D_UL_R1;
// Update sign state information of neighbors
if (sym != 0)
{
csj |= STATE_SIG_R2 | STATE_VISITED_R2 | STATE_NZ_CTXT_R1 | STATE_V_D_R1 | STATE_V_D_SIGN_R1;
state[j + sscanw] |= STATE_NZ_CTXT_R1 | STATE_V_U_R1 | STATE_V_U_SIGN_R1;
state[j + 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_D_DL_R1 | STATE_H_L_R2 | STATE_H_L_SIGN_R2;
state[j - 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_D_DR_R1 | STATE_H_R_R2 | STATE_H_R_SIGN_R2;
}
else
{
csj |= STATE_SIG_R2 | STATE_VISITED_R2 | STATE_NZ_CTXT_R1 | STATE_V_D_R1;
state[j + sscanw] |= STATE_NZ_CTXT_R1 | STATE_V_U_R1;
state[j + 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_D_DL_R1 | STATE_H_L_R2;
state[j - 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_D_DR_R1 | STATE_H_R_R2;
}
// Update distortion
normval = (data[k] >> downshift) << upshift;
dist += fs[normval & ((1 << MSE_LKP_BITS_M1) - 1)];
}
else
{
csj |= STATE_VISITED_R2;
}
}
state[j] = csj;
}
}
}
// Get length and terminate if needed
if (doterm)
{
ratebuf[pidx] = bout.terminate();
}
else
{
ratebuf[pidx] = bout.length();
}
// Add length of previous segments, if any
if (ltpidx >= 0)
{
ratebuf[pidx] += ratebuf[ltpidx];
}
// Return the reduction in distortion
return dist;
}
/// Performs the magnitude refinement pass on the specified data and
/// bit-plane. It codes the samples which are significant and which do not
/// have the "visited" state bit turned on, using the MR primitive. The
/// "visited" state bit is not mofified for any samples.
///
///
/// The code-block data to code
///
///
/// The MQ-coder to use
///
///
/// If true it performs an MQ-coder termination after the end
/// of the pass
///
///
/// The bit-plane to code
///
///
/// The state information for the code-block
///
///
/// The distortion estimation lookup table for MR
///
///
/// The buffer to hold symbols to send to the MQ coder
///
///
/// A buffer to hold the contexts to use in sending the
/// buffered symbols to the MQ coder.
///
///
/// The buffer where to store the rate (i.e. coded lenth) at
/// the end of this coding pass.
///
///
/// The coding pass index. Is the index in the 'ratebuf' array
/// where to store the coded length after this coding pass.
///
///
/// The index of the last pass that was terminated, or
/// negative if none.
///
///
/// The bitmask of entropy coding options to apply to the
/// code-block
///
///
/// The decrease in distortion for this pass, in the fixed-point
/// normalized representation of the 'FS_LOSSY' and 'FS_LOSSLESS' tables.
///
///
static private int magRefPass(CBlkWTData srcblk, MQCoder mq, bool doterm, int bp, int[] state, int[] fm, int[] symbuf, int[] ctxtbuf, int[] ratebuf, int pidx, int ltpidx, int options)
{
int j, sj; // The state index for line and stripe
int k, sk; // The data index for line and stripe
int nsym = 0; // Symbol counter for symbol and context buffers
int dscanw; // The data scan-width
int sscanw; // The state scan-width
int jstep; // Stripe to stripe step for 'sj'
int kstep; // Stripe to stripe step for 'sk'
int stopsk; // The loop limit on the variable sk
int csj; // Local copy (i.e. cached) of 'state[j]'
int mask; // The mask for the current bit-plane
int[] data; // The data buffer
int dist; // The distortion reduction for this pass
int shift; // Shift amount for distortion
int upshift; // Shift left amount for distortion
int downshift; // Shift right amount for distortion
int normval; // The normalized sample magnitude value
int s; // The stripe index
int nstripes; // The number of stripes in the code-block
int sheight; // Height of the current stripe
// Initialize local variables
dscanw = srcblk.scanw;
sscanw = srcblk.w + 2;
jstep = sscanw * CSJ2K.j2k.entropy.StdEntropyCoderOptions.STRIPE_HEIGHT / 2 - srcblk.w;
kstep = dscanw * CSJ2K.j2k.entropy.StdEntropyCoderOptions.STRIPE_HEIGHT - srcblk.w;
mask = 1 << bp;
data = (int[]) srcblk.Data;
nstripes = (srcblk.h + CSJ2K.j2k.entropy.StdEntropyCoderOptions.STRIPE_HEIGHT - 1) / CSJ2K.j2k.entropy.StdEntropyCoderOptions.STRIPE_HEIGHT;
dist = 0;
// We use the bit just coded plus MSE_LKP_BITS-1 bits below the bit
// just coded for distortion estimation.
shift = bp - MSE_LKP_BITS_M1;
upshift = (shift >= 0)?0:- shift;
downshift = (shift <= 0)?0:shift;
// Code stripe by stripe
sk = srcblk.offset;
sj = sscanw + 1;
for (s = nstripes - 1; s >= 0; s--, sk += kstep, sj += jstep)
{
sheight = (s != 0)?CSJ2K.j2k.entropy.StdEntropyCoderOptions.STRIPE_HEIGHT:srcblk.h - (nstripes - 1) * CSJ2K.j2k.entropy.StdEntropyCoderOptions.STRIPE_HEIGHT;
stopsk = sk + srcblk.w;
// Scan by set of 1 stripe column at a time
for (nsym = 0; sk < stopsk; sk++, sj++)
{
// Do half top of column
j = sj;
csj = state[j];
// If any of the two samples is significant and not yet
// visited in the current bit-plane we can not skip them
if ((((SupportClass.URShift(csj, 1)) & (~ csj)) & VSTD_MASK_R1R2) != 0)
{
k = sk;
// Scan first row
if ((csj & (STATE_SIG_R1 | STATE_VISITED_R1)) == STATE_SIG_R1)
{
// Apply MR primitive
symbuf[nsym] = SupportClass.URShift((data[k] & mask), bp);
ctxtbuf[nsym++] = MR_LUT[csj & MR_MASK];
// Update the STATE_PREV_MR bit
csj |= STATE_PREV_MR_R1;
// Update distortion
normval = (data[k] >> downshift) << upshift;
dist += fm[normval & ((1 << MSE_LKP_BITS) - 1)];
}
if (sheight < 2)
{
state[j] = csj;
continue;
}
// Scan second row
if ((csj & (STATE_SIG_R2 | STATE_VISITED_R2)) == STATE_SIG_R2)
{
k += dscanw;
// Apply MR primitive
symbuf[nsym] = SupportClass.URShift((data[k] & mask), bp);
ctxtbuf[nsym++] = MR_LUT[(SupportClass.URShift(csj, STATE_SEP)) & MR_MASK];
// Update the STATE_PREV_MR bit
csj |= STATE_PREV_MR_R2;
// Update distortion
normval = (data[k] >> downshift) << upshift;
dist += fm[normval & ((1 << MSE_LKP_BITS) - 1)];
}
state[j] = csj;
}
// Do half bottom of column
if (sheight < 3)
continue;
j += sscanw;
csj = state[j];
// If any of the two samples is significant and not yet
// visited in the current bit-plane we can not skip them
if ((((SupportClass.URShift(csj, 1)) & (~ csj)) & VSTD_MASK_R1R2) != 0)
{
k = sk + (dscanw << 1);
// Scan first row
if ((csj & (STATE_SIG_R1 | STATE_VISITED_R1)) == STATE_SIG_R1)
{
// Apply MR primitive
symbuf[nsym] = SupportClass.URShift((data[k] & mask), bp);
ctxtbuf[nsym++] = MR_LUT[csj & MR_MASK];
// Update the STATE_PREV_MR bit
csj |= STATE_PREV_MR_R1;
// Update distortion
normval = (data[k] >> downshift) << upshift;
dist += fm[normval & ((1 << MSE_LKP_BITS) - 1)];
}
if (sheight < 4)
{
state[j] = csj;
continue;
}
// Scan second row
if ((state[j] & (STATE_SIG_R2 | STATE_VISITED_R2)) == STATE_SIG_R2)
{
k += dscanw;
// Apply MR primitive
symbuf[nsym] = SupportClass.URShift((data[k] & mask), bp);
ctxtbuf[nsym++] = MR_LUT[(SupportClass.URShift(csj, STATE_SEP)) & MR_MASK];
// Update the STATE_PREV_MR bit
csj |= STATE_PREV_MR_R2;
// Update distortion
normval = (data[k] >> downshift) << upshift;
dist += fm[normval & ((1 << MSE_LKP_BITS) - 1)];
}
state[j] = csj;
}
}
// Code all buffered symbols, if any
if (nsym > 0)
mq.codeSymbols(symbuf, ctxtbuf, nsym);
}
// Reset the MQ context states if we need to
if ((options & CSJ2K.j2k.entropy.StdEntropyCoderOptions.OPT_RESET_MQ) != 0)
{
mq.resetCtxts();
}
// Terminate the MQ bit stream if we need to
if (doterm)
{
ratebuf[pidx] = mq.terminate(); // Termination has special length
}
else
{
// Use normal length calculation
ratebuf[pidx] = mq.NumCodedBytes;
}
// Add length of previous segments, if any
if (ltpidx >= 0)
{
ratebuf[pidx] += ratebuf[ltpidx];
}
// Finish length calculation if needed
if (doterm)
{
mq.finishLengthCalculation(ratebuf, pidx);
}
// Return the reduction in distortion
return dist;
}
/// Performs the magnitude refinement pass on the specified data and
/// bit-plane, without using the arithmetic coder. It codes the samples
/// which are significant and which do not have the "visited" state bit
/// turned on, using the MR primitive. The "visited" state bit is not
/// mofified for any samples.
///
/// In this method, the arithmetic coder is bypassed, and raw bits are
/// directly written in the bit stream (useful when distribution are close
/// to uniform, for intance, at high bit-rates and at lossless
/// compression). The 'STATE_PREV_MR_R1' and 'STATE_PREV_MR_R2' bits are
/// not set because they are used only when the arithmetic coder is not
/// bypassed.
///
///
/// The code-block data to code
///
///
/// The bit based output
///
///
/// If true the bit based output is byte aligned after the
/// end of the pass.
///
///
/// The bit-plane to code
///
///
/// The state information for the code-block
///
///
/// The distortion estimation lookup table for MR
///
///
/// The buffer where to store the rate (i.e. coded lenth) at
/// the end of this coding pass.
///
///
/// The coding pass index. Is the index in the 'ratebuf' array
/// where to store the coded length after this coding pass.
///
///
/// The index of the last pass that was terminated, or
/// negative if none.
///
///
/// The bitmask of entropy coding options to apply to the
/// code-block
///
///
/// The decrease in distortion for this pass, in the fixed-point
/// normalized representation of the 'FS_LOSSY' and 'FS_LOSSLESS' tables.
///
///
static private int rawMagRefPass(CBlkWTData srcblk, BitToByteOutput bout, bool doterm, int bp, int[] state, int[] fm, int[] ratebuf, int pidx, int ltpidx, int options)
{
int j, sj; // The state index for line and stripe
int k, sk; // The data index for line and stripe
int dscanw; // The data scan-width
int sscanw; // The state scan-width
int jstep; // Stripe to stripe step for 'sj'
int kstep; // Stripe to stripe step for 'sk'
int stopsk; // The loop limit on the variable sk
int csj; // Local copy (i.e. cached) of 'state[j]'
int mask; // The mask for the current bit-plane
int[] data; // The data buffer
int dist; // The distortion reduction for this pass
int shift; // Shift amount for distortion
int upshift; // Shift left amount for distortion
int downshift; // Shift right amount for distortion
int normval; // The normalized sample magnitude value
int s; // The stripe index
int nstripes; // The number of stripes in the code-block
int sheight; // Height of the current stripe
int nsym = 0;
// Initialize local variables
dscanw = srcblk.scanw;
sscanw = srcblk.w + 2;
jstep = sscanw * CSJ2K.j2k.entropy.StdEntropyCoderOptions.STRIPE_HEIGHT / 2 - srcblk.w;
kstep = dscanw * CSJ2K.j2k.entropy.StdEntropyCoderOptions.STRIPE_HEIGHT - srcblk.w;
mask = 1 << bp;
data = (int[]) srcblk.Data;
nstripes = (srcblk.h + CSJ2K.j2k.entropy.StdEntropyCoderOptions.STRIPE_HEIGHT - 1) / CSJ2K.j2k.entropy.StdEntropyCoderOptions.STRIPE_HEIGHT;
dist = 0;
// We use the bit just coded plus MSE_LKP_BITS-1 bits below the bit
// just coded for distortion estimation.
shift = bp - MSE_LKP_BITS_M1;
upshift = (shift >= 0)?0:- shift;
downshift = (shift <= 0)?0:shift;
// Code stripe by stripe
sk = srcblk.offset;
sj = sscanw + 1;
for (s = nstripes - 1; s >= 0; s--, sk += kstep, sj += jstep)
{
sheight = (s != 0)?CSJ2K.j2k.entropy.StdEntropyCoderOptions.STRIPE_HEIGHT:srcblk.h - (nstripes - 1) * CSJ2K.j2k.entropy.StdEntropyCoderOptions.STRIPE_HEIGHT;
stopsk = sk + srcblk.w;
// Scan by set of 1 stripe column at a time
for (; sk < stopsk; sk++, sj++)
{
// Do half top of column
j = sj;
csj = state[j];
// If any of the two samples is significant and not yet
// visited in the current bit-plane we can not skip them
if ((((SupportClass.URShift(csj, 1)) & (~ csj)) & VSTD_MASK_R1R2) != 0)
{
k = sk;
// Scan first row
if ((csj & (STATE_SIG_R1 | STATE_VISITED_R1)) == STATE_SIG_R1)
{
// Code bit "raw"
bout.writeBit(SupportClass.URShift((data[k] & mask), bp));
nsym++;
// No need to set STATE_PREV_MR_R1 since all magnitude
// refinement passes to follow are "raw"
// Update distortion
normval = (data[k] >> downshift) << upshift;
dist += fm[normval & ((1 << MSE_LKP_BITS) - 1)];
}
if (sheight < 2)
continue;
// Scan second row
if ((csj & (STATE_SIG_R2 | STATE_VISITED_R2)) == STATE_SIG_R2)
{
k += dscanw;
// Code bit "raw"
bout.writeBit(SupportClass.URShift((data[k] & mask), bp));
nsym++;
// No need to set STATE_PREV_MR_R2 since all magnitude
// refinement passes to follow are "raw"
// Update distortion
normval = (data[k] >> downshift) << upshift;
dist += fm[normval & ((1 << MSE_LKP_BITS) - 1)];
}
}
// Do half bottom of column
if (sheight < 3)
continue;
j += sscanw;
csj = state[j];
// If any of the two samples is significant and not yet
// visited in the current bit-plane we can not skip them
if ((((SupportClass.URShift(csj, 1)) & (~ csj)) & VSTD_MASK_R1R2) != 0)
{
k = sk + (dscanw << 1);
// Scan first row
if ((csj & (STATE_SIG_R1 | STATE_VISITED_R1)) == STATE_SIG_R1)
{
// Code bit "raw"
bout.writeBit(SupportClass.URShift((data[k] & mask), bp));
nsym++;
// No need to set STATE_PREV_MR_R1 since all magnitude
// refinement passes to follow are "raw"
// Update distortion
normval = (data[k] >> downshift) << upshift;
dist += fm[normval & ((1 << MSE_LKP_BITS) - 1)];
}
if (sheight < 4)
continue;
// Scan second row
if ((state[j] & (STATE_SIG_R2 | STATE_VISITED_R2)) == STATE_SIG_R2)
{
k += dscanw;
// Code bit "raw"
bout.writeBit(SupportClass.URShift((data[k] & mask), bp));
nsym++;
// No need to set STATE_PREV_MR_R2 since all magnitude
// refinement passes to follow are "raw"
// Update distortion
normval = (data[k] >> downshift) << upshift;
dist += fm[normval & ((1 << MSE_LKP_BITS) - 1)];
}
}
}
}
// Get length and terminate if needed
if (doterm)
{
ratebuf[pidx] = bout.terminate();
}
else
{
ratebuf[pidx] = bout.length();
}
// Add length of previous segments, if any
if (ltpidx >= 0)
{
ratebuf[pidx] += ratebuf[ltpidx];
}
// Return the reduction in distortion
return dist;
}
/// Performs the cleanup pass on the specified data and bit-plane. It codes
/// all insignificant samples which have its "visited" state bit off, using
/// the ZC, SC, and RLC primitives. It toggles the "visited" state bit to 0
/// (off) for all samples in the code-block.
///
///
/// The code-block data to code
///
///
/// The MQ-coder to use
///
///
/// If true it performs an MQ-coder termination after the end
/// of the pass
///
///
/// The bit-plane to code
///
///
/// The state information for the code-block
///
///
/// The distortion estimation lookup table for SC
///
///
/// The ZC lookup table to use in ZC.
///
///
/// The buffer to hold symbols to send to the MQ coder
///
///
/// A buffer to hold the contexts to use in sending the
/// buffered symbols to the MQ coder.
///
///
/// The buffer where to store the rate (i.e. coded lenth) at
/// the end of this coding pass.
///
///
/// The coding pass index. Is the index in the 'ratebuf' array
/// where to store the coded length after this coding pass.
///
///
/// The index of the last pass that was terminated, or
/// negative if none.
///
///
/// The bitmask of entropy coding options to apply to the
/// code-block
///
///
/// The decrease in distortion for this pass, in the fixed-point
/// normalized representation of the 'FS_LOSSY' and 'FS_LOSSLESS' tables.
///
///
static private int cleanuppass(CBlkWTData srcblk, MQCoder mq, bool doterm, int bp, int[] state, int[] fs, int[] zc_lut, int[] symbuf, int[] ctxtbuf, int[] ratebuf, int pidx, int ltpidx, int options)
{
// NOTE: The speedup mode of the MQ coder has been briefly tried to
// speed up the coding of insignificants RLCs, without any success
// (i.e. no speedup whatsoever). The use of the speedup mode should be
// revisisted more in depth and the implementationn of it in MQCoder
// should be reviewed for optimization opportunities.
int j, sj; // The state index for line and stripe
int k, sk; // The data index for line and stripe
int nsym = 0; // Symbol counter for symbol and context buffers
int dscanw; // The data scan-width
int sscanw; // The state scan-width
int jstep; // Stripe to stripe step for 'sj'
int kstep; // Stripe to stripe step for 'sk'
int stopsk; // The loop limit on the variable sk
int csj; // Local copy (i.e. cached) of 'state[j]'
int mask; // The mask for the current bit-plane
int sym; // The symbol to code
int rlclen; // Length of RLC
int ctxt; // The context to use
int[] data; // The data buffer
int dist; // The distortion reduction for this pass
int shift; // Shift amount for distortion
int upshift; // Shift left amount for distortion
int downshift; // Shift right amount for distortion
int normval; // The normalized sample magnitude value
int s; // The stripe index
bool causal; // Flag to indicate if stripe-causal context
// formation is to be used
int nstripes; // The number of stripes in the code-block
int sheight; // Height of the current stripe
int off_ul, off_ur, off_dr, off_dl; // offsets
// Initialize local variables
dscanw = srcblk.scanw;
sscanw = srcblk.w + 2;
jstep = sscanw * CSJ2K.j2k.entropy.StdEntropyCoderOptions.STRIPE_HEIGHT / 2 - srcblk.w;
kstep = dscanw * CSJ2K.j2k.entropy.StdEntropyCoderOptions.STRIPE_HEIGHT - srcblk.w;
mask = 1 << bp;
data = (int[]) srcblk.Data;
nstripes = (srcblk.h + CSJ2K.j2k.entropy.StdEntropyCoderOptions.STRIPE_HEIGHT - 1) / CSJ2K.j2k.entropy.StdEntropyCoderOptions.STRIPE_HEIGHT;
dist = 0;
// We use the MSE_LKP_BITS-1 bits below the bit just coded for
// distortion estimation.
shift = bp - MSE_LKP_BITS_M1;
upshift = (shift >= 0)?0:- shift;
downshift = (shift <= 0)?0:shift;
causal = (options & CSJ2K.j2k.entropy.StdEntropyCoderOptions.OPT_VERT_STR_CAUSAL) != 0;
// Pre-calculate offsets in 'state' for diagonal neighbors
off_ul = - sscanw - 1; // up-left
off_ur = - sscanw + 1; // up-right
off_dr = sscanw + 1; // down-right
off_dl = sscanw - 1; // down-left
// Code stripe by stripe
sk = srcblk.offset;
sj = sscanw + 1;
for (s = nstripes - 1; s >= 0; s--, sk += kstep, sj += jstep)
{
sheight = (s != 0)?CSJ2K.j2k.entropy.StdEntropyCoderOptions.STRIPE_HEIGHT:srcblk.h - (nstripes - 1) * CSJ2K.j2k.entropy.StdEntropyCoderOptions.STRIPE_HEIGHT;
stopsk = sk + srcblk.w;
// Scan by set of 1 stripe column at a time
for (nsym = 0; sk < stopsk; sk++, sj++)
{
// Start column
j = sj;
csj = state[j];
{
// Check for RLC: if all samples are not significant, not
// visited and do not have a non-zero context, and column
// is full height, we do RLC.
if (csj == 0 && state[j + sscanw] == 0 && sheight == CSJ2K.j2k.entropy.StdEntropyCoderOptions.STRIPE_HEIGHT)
{
k = sk;
if ((data[k] & mask) != 0)
{
rlclen = 0;
}
else if ((data[k += dscanw] & mask) != 0)
{
rlclen = 1;
}
else if ((data[k += dscanw] & mask) != 0)
{
rlclen = 2;
j += sscanw;
csj = state[j];
}
else if ((data[k += dscanw] & mask) != 0)
{
rlclen = 3;
j += sscanw;
csj = state[j];
}
else
{
// Code insignificant RLC
symbuf[nsym] = 0;
ctxtbuf[nsym++] = RLC_CTXT;
// Goto next column
continue;
}
// Code significant RLC
symbuf[nsym] = 1;
ctxtbuf[nsym++] = RLC_CTXT;
// Send MSB bit index
symbuf[nsym] = rlclen >> 1;
ctxtbuf[nsym++] = UNIF_CTXT;
// Send LSB bit index
symbuf[nsym] = rlclen & 0x01;
ctxtbuf[nsym++] = UNIF_CTXT;
// Code sign of sample that became significant
// Update distortion
normval = (data[k] >> downshift) << upshift;
dist += fs[normval & ((1 << MSE_LKP_BITS_M1) - 1)];
// Apply sign coding
sym = SupportClass.URShift(data[k], 31);
if ((rlclen & 0x01) == 0)
{
// Sample that became significant is first row of
// its column half
ctxt = SC_LUT[(SupportClass.URShift(csj, SC_SHIFT_R1)) & SC_MASK];
symbuf[nsym] = sym ^ (SupportClass.URShift(ctxt, SC_SPRED_SHIFT));
ctxtbuf[nsym++] = ctxt & SC_LUT_MASK;
// Update state information (significant bit,
// visited bit, neighbor significant bit of
// neighbors, non zero context of neighbors, sign
// of neighbors)
if (rlclen != 0 || !causal)
{
// If in causal mode do not change contexts of
// previous stripe.
state[j + off_ul] |= STATE_NZ_CTXT_R2 | STATE_D_DR_R2;
state[j + off_ur] |= STATE_NZ_CTXT_R2 | STATE_D_DL_R2;
}
// Update sign state information of neighbors
if (sym != 0)
{
csj |= STATE_SIG_R1 | STATE_VISITED_R1 | STATE_NZ_CTXT_R2 | STATE_V_U_R2 | STATE_V_U_SIGN_R2;
if (rlclen != 0 || !causal)
{
// If in causal mode do not change
// contexts of previous stripe.
state[j - sscanw] |= STATE_NZ_CTXT_R2 | STATE_V_D_R2 | STATE_V_D_SIGN_R2;
}
state[j + 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_H_L_R1 | STATE_H_L_SIGN_R1 | STATE_D_UL_R2;
state[j - 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_H_R_R1 | STATE_H_R_SIGN_R1 | STATE_D_UR_R2;
}
else
{
csj |= STATE_SIG_R1 | STATE_VISITED_R1 | STATE_NZ_CTXT_R2 | STATE_V_U_R2;
if (rlclen != 0 || !causal)
{
// If in causal mode do not change
// contexts of previous stripe.
state[j - sscanw] |= STATE_NZ_CTXT_R2 | STATE_V_D_R2;
}
state[j + 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_H_L_R1 | STATE_D_UL_R2;
state[j - 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_H_R_R1 | STATE_D_UR_R2;
}
// Changes to csj are saved later
if ((rlclen >> 1) != 0)
{
// Sample that became significant is in bottom
// half of column => jump to bottom half
//UPGRADE_NOTE: Labeled break statement was changed to a goto statement. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1012'"
goto top_half_brk;
}
// Otherwise sample that became significant is in
// top half of column => continue on top half
}
else
{
// Sample that became significant is second row of
// its column half
ctxt = SC_LUT[(SupportClass.URShift(csj, SC_SHIFT_R2)) & SC_MASK];
symbuf[nsym] = sym ^ (SupportClass.URShift(ctxt, SC_SPRED_SHIFT));
ctxtbuf[nsym++] = ctxt & SC_LUT_MASK;
// Update state information (significant bit,
// neighbor significant bit of neighbors, non zero
// context of neighbors, sign of neighbors)
state[j + off_dl] |= STATE_NZ_CTXT_R1 | STATE_D_UR_R1;
state[j + off_dr] |= STATE_NZ_CTXT_R1 | STATE_D_UL_R1;
// Update sign state information of neighbors
if (sym != 0)
{
csj |= STATE_SIG_R2 | STATE_NZ_CTXT_R1 | STATE_V_D_R1 | STATE_V_D_SIGN_R1;
state[j + sscanw] |= STATE_NZ_CTXT_R1 | STATE_V_U_R1 | STATE_V_U_SIGN_R1;
state[j + 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_D_DL_R1 | STATE_H_L_R2 | STATE_H_L_SIGN_R2;
state[j - 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_D_DR_R1 | STATE_H_R_R2 | STATE_H_R_SIGN_R2;
}
else
{
csj |= STATE_SIG_R2 | STATE_NZ_CTXT_R1 | STATE_V_D_R1;
state[j + sscanw] |= STATE_NZ_CTXT_R1 | STATE_V_U_R1;
state[j + 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_D_DL_R1 | STATE_H_L_R2;
state[j - 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_D_DR_R1 | STATE_H_R_R2;
}
// Save changes to csj
state[j] = csj;
if ((rlclen >> 1) != 0)
{
// Sample that became significant is in bottom
// half of column => we're done with this
// column
continue;
}
// Otherwise sample that became significant is in
// top half of column => we're done with top
// column
j += sscanw;
csj = state[j];
//UPGRADE_NOTE: Labeled break statement was changed to a goto statement. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1012'"
goto top_half_brk;
}
}
// Do half top of column
// If any of the two samples is not significant and has
// not been visited in the current bit-plane we can not
// skip them
if ((((csj >> 1) | csj) & VSTD_MASK_R1R2) != VSTD_MASK_R1R2)
{
k = sk;
// Scan first row
if ((csj & (STATE_SIG_R1 | STATE_VISITED_R1)) == 0)
{
// Apply zero coding
ctxtbuf[nsym] = zc_lut[csj & ZC_MASK];
if ((symbuf[nsym++] = SupportClass.URShift((data[k] & mask), bp)) != 0)
{
// Became significant
// Apply sign coding
sym = SupportClass.URShift(data[k], 31);
ctxt = SC_LUT[(SupportClass.URShift(csj, SC_SHIFT_R1)) & SC_MASK];
symbuf[nsym] = sym ^ (SupportClass.URShift(ctxt, SC_SPRED_SHIFT));
ctxtbuf[nsym++] = ctxt & SC_LUT_MASK;
// Update state information (significant bit,
// visited bit, neighbor significant bit of
// neighbors, non zero context of neighbors,
// sign of neighbors)
if (!causal)
{
// If in causal mode do not change
// contexts of previous stripe.
state[j + off_ul] |= STATE_NZ_CTXT_R2 | STATE_D_DR_R2;
state[j + off_ur] |= STATE_NZ_CTXT_R2 | STATE_D_DL_R2;
}
// Update sign state information of neighbors
if (sym != 0)
{
csj |= STATE_SIG_R1 | STATE_VISITED_R1 | STATE_NZ_CTXT_R2 | STATE_V_U_R2 | STATE_V_U_SIGN_R2;
if (!causal)
{
// If in causal mode do not change
// contexts of previous stripe.
state[j - sscanw] |= STATE_NZ_CTXT_R2 | STATE_V_D_R2 | STATE_V_D_SIGN_R2;
}
state[j + 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_H_L_R1 | STATE_H_L_SIGN_R1 | STATE_D_UL_R2;
state[j - 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_H_R_R1 | STATE_H_R_SIGN_R1 | STATE_D_UR_R2;
}
else
{
csj |= STATE_SIG_R1 | STATE_VISITED_R1 | STATE_NZ_CTXT_R2 | STATE_V_U_R2;
if (!causal)
{
// If in causal mode do not change
// contexts of previous stripe.
state[j - sscanw] |= STATE_NZ_CTXT_R2 | STATE_V_D_R2;
}
state[j + 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_H_L_R1 | STATE_D_UL_R2;
state[j - 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_H_R_R1 | STATE_D_UR_R2;
}
// Update distortion
normval = (data[k] >> downshift) << upshift;
dist += fs[normval & ((1 << MSE_LKP_BITS_M1) - 1)];
}
}
if (sheight < 2)
{
csj &= ~ (STATE_VISITED_R1 | STATE_VISITED_R2);
state[j] = csj;
continue;
}
// Scan second row
if ((csj & (STATE_SIG_R2 | STATE_VISITED_R2)) == 0)
{
k += dscanw;
// Apply zero coding
ctxtbuf[nsym] = zc_lut[(SupportClass.URShift(csj, STATE_SEP)) & ZC_MASK];
if ((symbuf[nsym++] = SupportClass.URShift((data[k] & mask), bp)) != 0)
{
// Became significant
// Apply sign coding
sym = SupportClass.URShift(data[k], 31);
ctxt = SC_LUT[(SupportClass.URShift(csj, SC_SHIFT_R2)) & SC_MASK];
symbuf[nsym] = sym ^ (SupportClass.URShift(ctxt, SC_SPRED_SHIFT));
ctxtbuf[nsym++] = ctxt & SC_LUT_MASK;
// Update state information (significant bit,
// visited bit, neighbor significant bit of
// neighbors, non zero context of neighbors,
// sign of neighbors)
state[j + off_dl] |= STATE_NZ_CTXT_R1 | STATE_D_UR_R1;
state[j + off_dr] |= STATE_NZ_CTXT_R1 | STATE_D_UL_R1;
// Update sign state information of neighbors
if (sym != 0)
{
csj |= STATE_SIG_R2 | STATE_VISITED_R2 | STATE_NZ_CTXT_R1 | STATE_V_D_R1 | STATE_V_D_SIGN_R1;
state[j + sscanw] |= STATE_NZ_CTXT_R1 | STATE_V_U_R1 | STATE_V_U_SIGN_R1;
state[j + 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_D_DL_R1 | STATE_H_L_R2 | STATE_H_L_SIGN_R2;
state[j - 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_D_DR_R1 | STATE_H_R_R2 | STATE_H_R_SIGN_R2;
}
else
{
csj |= STATE_SIG_R2 | STATE_VISITED_R2 | STATE_NZ_CTXT_R1 | STATE_V_D_R1;
state[j + sscanw] |= STATE_NZ_CTXT_R1 | STATE_V_U_R1;
state[j + 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_D_DL_R1 | STATE_H_L_R2;
state[j - 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_D_DR_R1 | STATE_H_R_R2;
}
// Update distortion
normval = (data[k] >> downshift) << upshift;
dist += fs[normval & ((1 << MSE_LKP_BITS_M1) - 1)];
}
}
}
csj &= ~ (STATE_VISITED_R1 | STATE_VISITED_R2);
state[j] = csj;
// Do half bottom of column
if (sheight < 3)
continue;
j += sscanw;
csj = state[j];
}
//UPGRADE_NOTE: Label 'top_half_brk' was added. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1011'"
top_half_brk: ;
// end of 'top_half' block
// If any of the two samples is not significant and has
// not been visited in the current bit-plane we can not
// skip them
if ((((csj >> 1) | csj) & VSTD_MASK_R1R2) != VSTD_MASK_R1R2)
{
k = sk + (dscanw << 1);
// Scan first row
if ((csj & (STATE_SIG_R1 | STATE_VISITED_R1)) == 0)
{
// Apply zero coding
ctxtbuf[nsym] = zc_lut[csj & ZC_MASK];
if ((symbuf[nsym++] = SupportClass.URShift((data[k] & mask), bp)) != 0)
{
// Became significant
// Apply sign coding
sym = SupportClass.URShift(data[k], 31);
ctxt = SC_LUT[(SupportClass.URShift(csj, SC_SHIFT_R1)) & SC_MASK];
symbuf[nsym] = sym ^ (SupportClass.URShift(ctxt, SC_SPRED_SHIFT));
ctxtbuf[nsym++] = ctxt & SC_LUT_MASK;
// Update state information (significant bit,
// visited bit, neighbor significant bit of
// neighbors, non zero context of neighbors,
// sign of neighbors)
state[j + off_ul] |= STATE_NZ_CTXT_R2 | STATE_D_DR_R2;
state[j + off_ur] |= STATE_NZ_CTXT_R2 | STATE_D_DL_R2;
// Update sign state information of neighbors
if (sym != 0)
{
csj |= STATE_SIG_R1 | STATE_VISITED_R1 | STATE_NZ_CTXT_R2 | STATE_V_U_R2 | STATE_V_U_SIGN_R2;
state[j - sscanw] |= STATE_NZ_CTXT_R2 | STATE_V_D_R2 | STATE_V_D_SIGN_R2;
state[j + 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_H_L_R1 | STATE_H_L_SIGN_R1 | STATE_D_UL_R2;
state[j - 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_H_R_R1 | STATE_H_R_SIGN_R1 | STATE_D_UR_R2;
}
else
{
csj |= STATE_SIG_R1 | STATE_VISITED_R1 | STATE_NZ_CTXT_R2 | STATE_V_U_R2;
state[j - sscanw] |= STATE_NZ_CTXT_R2 | STATE_V_D_R2;
state[j + 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_H_L_R1 | STATE_D_UL_R2;
state[j - 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_H_R_R1 | STATE_D_UR_R2;
}
// Update distortion
normval = (data[k] >> downshift) << upshift;
dist += fs[normval & ((1 << MSE_LKP_BITS_M1) - 1)];
}
}
if (sheight < 4)
{
csj &= ~ (STATE_VISITED_R1 | STATE_VISITED_R2);
state[j] = csj;
continue;
}
// Scan second row
if ((csj & (STATE_SIG_R2 | STATE_VISITED_R2)) == 0)
{
k += dscanw;
// Apply zero coding
ctxtbuf[nsym] = zc_lut[(SupportClass.URShift(csj, STATE_SEP)) & ZC_MASK];
if ((symbuf[nsym++] = SupportClass.URShift((data[k] & mask), bp)) != 0)
{
// Became significant
// Apply sign coding
sym = SupportClass.URShift(data[k], 31);
ctxt = SC_LUT[(SupportClass.URShift(csj, SC_SHIFT_R2)) & SC_MASK];
symbuf[nsym] = sym ^ (SupportClass.URShift(ctxt, SC_SPRED_SHIFT));
ctxtbuf[nsym++] = ctxt & SC_LUT_MASK;
// Update state information (significant bit,
// visited bit, neighbor significant bit of
// neighbors, non zero context of neighbors,
// sign of neighbors)
state[j + off_dl] |= STATE_NZ_CTXT_R1 | STATE_D_UR_R1;
state[j + off_dr] |= STATE_NZ_CTXT_R1 | STATE_D_UL_R1;
// Update sign state information of neighbors
if (sym != 0)
{
csj |= STATE_SIG_R2 | STATE_VISITED_R2 | STATE_NZ_CTXT_R1 | STATE_V_D_R1 | STATE_V_D_SIGN_R1;
state[j + sscanw] |= STATE_NZ_CTXT_R1 | STATE_V_U_R1 | STATE_V_U_SIGN_R1;
state[j + 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_D_DL_R1 | STATE_H_L_R2 | STATE_H_L_SIGN_R2;
state[j - 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_D_DR_R1 | STATE_H_R_R2 | STATE_H_R_SIGN_R2;
}
else
{
csj |= STATE_SIG_R2 | STATE_VISITED_R2 | STATE_NZ_CTXT_R1 | STATE_V_D_R1;
state[j + sscanw] |= STATE_NZ_CTXT_R1 | STATE_V_U_R1;
state[j + 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_D_DL_R1 | STATE_H_L_R2;
state[j - 1] |= STATE_NZ_CTXT_R1 | STATE_NZ_CTXT_R2 | STATE_D_DR_R1 | STATE_H_R_R2;
}
// Update distortion
normval = (data[k] >> downshift) << upshift;
dist += fs[normval & ((1 << MSE_LKP_BITS_M1) - 1)];
}
}
}
csj &= ~ (STATE_VISITED_R1 | STATE_VISITED_R2);
state[j] = csj;
}
// Code all buffered symbols, if any
if (nsym > 0)
mq.codeSymbols(symbuf, ctxtbuf, nsym);
}
// Insert a segment marker if we need to
if ((options & CSJ2K.j2k.entropy.StdEntropyCoderOptions.OPT_SEG_SYMBOLS) != 0)
{
mq.codeSymbols(SEG_SYMBOLS, SEG_SYMB_CTXTS, SEG_SYMBOLS.Length);
}
// Reset the MQ context states if we need to
if ((options & CSJ2K.j2k.entropy.StdEntropyCoderOptions.OPT_RESET_MQ) != 0)
{
mq.resetCtxts();
}
// Terminate the MQ bit stream if we need to
if (doterm)
{
ratebuf[pidx] = mq.terminate(); // Termination has special length
}
else
{
// Use normal length calculation
ratebuf[pidx] = mq.NumCodedBytes;
}
// Add length of previous segments, if any
if (ltpidx >= 0)
{
ratebuf[pidx] += ratebuf[ltpidx];
}
// Finish length calculation if needed
if (doterm)
{
mq.finishLengthCalculation(ratebuf, pidx);
}
// Return the reduction in distortion
return dist;
}
/// Ensures that at the end of a non-terminated coding pass there is not a
/// 0xFF byte, modifying the stored rates if necessary.
///
/// Due to error resiliance reasons, a coding pass should never have its
/// last byte be a 0xFF, since that can lead to the emulation of a resync
/// marker. This method checks if that is the case, and reduces the rate
/// for a given pass if necessary. The ommitted 0xFF will be synthetized by
/// the decoder if necessary, as required by JPEG 2000. This method should
/// only be called once that the entire code-block is coded.
///
/// Passes that are terminated are not checked for the 0xFF byte, since
/// it is assumed that the termination procedure does not output any
/// trailing 0xFF. Checking the terminated segments would involve much more
/// than just modifying the stored rates.
///
/// NOTE: It is assumed by this method that the coded data does not
/// contain consecutive 0xFF bytes, as is the case with the MQ and
/// 'arithemetic coding bypass' bit stuffing policy. However, the
/// termination policies used should also respect this requirement.
///
///
/// The coded data for the code-block
///
///
/// The rate (i.e. accumulated number of bytes) for each
/// coding pass
///
///
/// An array of flags indicating, for each pass, if it is
/// terminated or not. If null it is assumed that no pass is terminated,
/// except the last one.
///
///
/// The number of coding passes
///
///
static private void checkEndOfPassFF(byte[] data, int[] rates, bool[] isterm, int n)
{
int dp; // the position to test in 'data'
// If a pass ends in 0xFF we need to reduce the number of bytes in it,
// so that it does not end in 0xFF. We only need to go back one byte
// since there can be no consecutive 0xFF bytes.
// If there are no terminated passes avoid the test on 'isterm'
if (isterm == null)
{
for (n--; n >= 0; n--)
{
dp = rates[n] - 1;
if (dp >= 0 && (data[dp] == (byte)0xFF))
{
rates[n]--;
}
}
}
else
{
for (n--; n >= 0; n--)
{
if (!isterm[n])
{
dp = rates[n] - 1;
if (dp >= 0 && (data[dp] == (byte)0xFF))
{
rates[n]--;
}
}
}
}
}
/// Load options, length calculation type and termination type for each
/// tile-component.
///
///
/// The number of tiles
///
///
/// The number of components
///
///
public virtual void initTileComp(int nt, int nc)
{
opts = new int[nt][];
for (int i2 = 0; i2 < nt; i2++)
{
opts[i2] = new int[nc];
}
lenCalc = new int[nt][];
for (int i3 = 0; i3 < nt; i3++)
{
lenCalc[i3] = new int[nc];
}
tType = new int[nt][];
for (int i4 = 0; i4 < nt; i4++)
{
tType[i4] = new int[nc];
}
for (int t = 0; t < nt; t++)
{
for (int c = 0; c < nc; c++)
{
opts[t][c] = 0;
// Bypass coding mode ?
if (((System.String) bms.getTileCompVal(t, c)).ToUpper().Equals("on".ToUpper()))
{
opts[t][c] |= CSJ2K.j2k.entropy.StdEntropyCoderOptions.OPT_BYPASS;
}
// MQ reset after each coding pass ?
if (((System.String) mqrs.getTileCompVal(t, c)).ToUpper().Equals("on".ToUpper()))
{
opts[t][c] |= CSJ2K.j2k.entropy.StdEntropyCoderOptions.OPT_RESET_MQ;
}
// MQ termination after each arithmetically coded coding pass ?
if (((System.String) rts.getTileCompVal(t, c)).ToUpper().Equals("on".ToUpper()))
{
opts[t][c] |= CSJ2K.j2k.entropy.StdEntropyCoderOptions.OPT_TERM_PASS;
}
// Vertically stripe-causal context mode ?
if (((System.String) css.getTileCompVal(t, c)).ToUpper().Equals("on".ToUpper()))
{
opts[t][c] |= CSJ2K.j2k.entropy.StdEntropyCoderOptions.OPT_VERT_STR_CAUSAL;
}
// Error resilience segmentation symbol insertion ?
if (((System.String) sss.getTileCompVal(t, c)).ToUpper().Equals("on".ToUpper()))
{
opts[t][c] |= CSJ2K.j2k.entropy.StdEntropyCoderOptions.OPT_SEG_SYMBOLS;
}
// Set length calculation type of the MQ coder
System.String lCalcType = (System.String) lcs.getTileCompVal(t, c);
if (lCalcType.Equals("near_opt"))
{
lenCalc[t][c] = MQCoder.LENGTH_NEAR_OPT;
}
else if (lCalcType.Equals("lazy_good"))
{
lenCalc[t][c] = MQCoder.LENGTH_LAZY_GOOD;
}
else if (lCalcType.Equals("lazy"))
{
lenCalc[t][c] = MQCoder.LENGTH_LAZY;
}
else
{
throw new System.ArgumentException("Unrecognized or " + "unsupported MQ " + "length calculation.");
}
// Set termination type of MQ coder
System.String termType = (System.String) tts.getTileCompVal(t, c);
if (termType.ToUpper().Equals("easy".ToUpper()))
{
tType[t][c] = MQCoder.TERM_EASY;
}
else if (termType.ToUpper().Equals("full".ToUpper()))
{
tType[t][c] = MQCoder.TERM_FULL;
}
else if (termType.ToUpper().Equals("near_opt".ToUpper()))
{
tType[t][c] = MQCoder.TERM_NEAR_OPT;
}
else if (termType.ToUpper().Equals("predict".ToUpper()))
{
tType[t][c] = MQCoder.TERM_PRED_ER;
opts[t][c] |= CSJ2K.j2k.entropy.StdEntropyCoderOptions.OPT_PRED_TERM;
if ((opts[t][c] & (CSJ2K.j2k.entropy.StdEntropyCoderOptions.OPT_TERM_PASS | CSJ2K.j2k.entropy.StdEntropyCoderOptions.OPT_BYPASS)) == 0)
{
FacilityManager.getMsgLogger().printmsg(CSJ2K.j2k.util.MsgLogger_Fields.INFO, "Using error resilient MQ" + " termination, but terminating only at " + "the end of code-blocks. The error " + "protection offered by this option will" + " be very weak. Specify the " + "'Cterminate' " + "and/or 'Cbypass' option for " + "increased error resilience.");
}
}
else
{
throw new System.ArgumentException("Unrecognized or " + "unsupported " + "MQ coder " + "termination.");
}
} // End loop on components
} // End loop on tiles
}
/// Returns the precinct partition width for the specified component, tile
/// and resolution level.
///
///
/// the tile index
///
///
/// the component
///
///
/// the resolution level
///
///
/// The precinct partition width for the specified component, tile
/// and resolution level
///
///
public override int getPPX(int t, int c, int rl)
{
return pss.getPPX(t, c, rl);
}
/// Returns the precinct partition height for the specified component, tile
/// and resolution level.
///
///
/// the tile index
///
///
/// the component
///
///
/// the resolution level
///
///
/// The precinct partition height for the specified component, tile
/// and resolution level
///
///
public override int getPPY(int t, int c, int rl)
{
return pss.getPPY(t, c, rl);
}
/// Returns true if precinct partition is used for the specified component
/// and tile, returns false otherwise.
///
///
/// The component
///
///
/// The tile
///
///
/// True if precinct partition is used for the specified component
/// and tile, returns false otherwise.
///
///
public override bool precinctPartitionUsed(int c, int t)
{
return precinctPartition[c][t];
}
/// Static initializer: initializes all the lookup tables.
static StdEntropyCoder()
{
{
int i, j;
double val, deltaMSE;
int[] inter_sc_lut;
int ds, us, rs, ls;
int dsgn, usgn, rsgn, lsgn;
int h, v;
// Initialize the zero coding lookup tables
// LH
// - No neighbors significant
ZC_LUT_LH[0] = 2;
// - No horizontal or vertical neighbors significant
for (i = 1; i < 16; i++)
{
// Two or more diagonal coeffs significant
ZC_LUT_LH[i] = 4;
}
for (i = 0; i < 4; i++)
{
// Only one diagonal coeff significant
ZC_LUT_LH[1 << i] = 3;
}
// - No horizontal neighbors significant, diagonal irrelevant
for (i = 0; i < 16; i++)
{
// Only one vertical coeff significant
ZC_LUT_LH[STATE_V_U_R1 | i] = 5;
ZC_LUT_LH[STATE_V_D_R1 | i] = 5;
// The two vertical coeffs significant
ZC_LUT_LH[STATE_V_U_R1 | STATE_V_D_R1 | i] = 6;
}
// - One horiz. neighbor significant, diagonal/vertical non-significant
ZC_LUT_LH[STATE_H_L_R1] = 7;
ZC_LUT_LH[STATE_H_R_R1] = 7;
// - One horiz. significant, no vertical significant, one or more
// diagonal significant
for (i = 1; i < 16; i++)
{
ZC_LUT_LH[STATE_H_L_R1 | i] = 8;
ZC_LUT_LH[STATE_H_R_R1 | i] = 8;
}
// - One horiz. significant, one or more vertical significant,
// diagonal irrelevant
for (i = 1; i < 4; i++)
{
for (j = 0; j < 16; j++)
{
ZC_LUT_LH[STATE_H_L_R1 | (i << 4) | j] = 9;
ZC_LUT_LH[STATE_H_R_R1 | (i << 4) | j] = 9;
}
}
// - Two horiz. significant, others irrelevant
for (i = 0; i < 64; i++)
{
ZC_LUT_LH[STATE_H_L_R1 | STATE_H_R_R1 | i] = 10;
}
// HL
// - No neighbors significant
ZC_LUT_HL[0] = 2;
// - No horizontal or vertical neighbors significant
for (i = 1; i < 16; i++)
{
// Two or more diagonal coeffs significant
ZC_LUT_HL[i] = 4;
}
for (i = 0; i < 4; i++)
{
// Only one diagonal coeff significant
ZC_LUT_HL[1 << i] = 3;
}
// - No vertical significant, diagonal irrelevant
for (i = 0; i < 16; i++)
{
// One horiz. significant
ZC_LUT_HL[STATE_H_L_R1 | i] = 5;
ZC_LUT_HL[STATE_H_R_R1 | i] = 5;
// Two horiz. significant
ZC_LUT_HL[STATE_H_L_R1 | STATE_H_R_R1 | i] = 6;
}
// - One vert. significant, diagonal/horizontal non-significant
ZC_LUT_HL[STATE_V_U_R1] = 7;
ZC_LUT_HL[STATE_V_D_R1] = 7;
// - One vert. significant, horizontal non-significant, one or more
// diag. significant
for (i = 1; i < 16; i++)
{
ZC_LUT_HL[STATE_V_U_R1 | i] = 8;
ZC_LUT_HL[STATE_V_D_R1 | i] = 8;
}
// - One vertical significant, one or more horizontal significant,
// diagonal irrelevant
for (i = 1; i < 4; i++)
{
for (j = 0; j < 16; j++)
{
ZC_LUT_HL[(i << 6) | STATE_V_U_R1 | j] = 9;
ZC_LUT_HL[(i << 6) | STATE_V_D_R1 | j] = 9;
}
}
// - Two vertical significant, others irrelevant
for (i = 0; i < 4; i++)
{
for (j = 0; j < 16; j++)
{
ZC_LUT_HL[(i << 6) | STATE_V_U_R1 | STATE_V_D_R1 | j] = 10;
}
}
// HH
int[] twoBits = new int[]{3, 5, 6, 9, 10, 12}; // Figures (between 0 and 15)
// countaning 2 and only 2 bits on in its binary representation.
int[] oneBit = new int[]{1, 2, 4, 8}; // Figures (between 0 and 15)
// countaning 1 and only 1 bit on in its binary representation.
int[] twoLeast = new int[]{3, 5, 6, 7, 9, 10, 11, 12, 13, 14, 15}; // Figures
// (between 0 and 15) countaining, at least, 2 bits on in its
// binary representation.
int[] threeLeast = new int[]{7, 11, 13, 14, 15}; // Figures
// (between 0 and 15) countaining, at least, 3 bits on in its
// binary representation.
// - None significant
ZC_LUT_HH[0] = 2;
// - One horizontal+vertical significant, none diagonal
for (i = 0; i < oneBit.Length; i++)
ZC_LUT_HH[oneBit[i] << 4] = 3;
// - Two or more horizontal+vertical significant, diagonal non-signif
for (i = 0; i < twoLeast.Length; i++)
ZC_LUT_HH[twoLeast[i] << 4] = 4;
// - One diagonal significant, horiz./vert. non-significant
for (i = 0; i < oneBit.Length; i++)
ZC_LUT_HH[oneBit[i]] = 5;
// - One diagonal significant, one horiz.+vert. significant
for (i = 0; i < oneBit.Length; i++)
for (j = 0; j < oneBit.Length; j++)
ZC_LUT_HH[(oneBit[i] << 4) | oneBit[j]] = 6;
// - One diag signif, two or more horiz+vert signif
for (i = 0; i < twoLeast.Length; i++)
for (j = 0; j < oneBit.Length; j++)
ZC_LUT_HH[(twoLeast[i] << 4) | oneBit[j]] = 7;
// - Two diagonal significant, none horiz+vert significant
for (i = 0; i < twoBits.Length; i++)
ZC_LUT_HH[twoBits[i]] = 8;
// - Two diagonal significant, one or more horiz+vert significant
for (j = 0; j < twoBits.Length; j++)
for (i = 1; i < 16; i++)
ZC_LUT_HH[(i << 4) | twoBits[j]] = 9;
// - Three or more diagonal significant, horiz+vert irrelevant
for (i = 0; i < 16; i++)
for (j = 0; j < threeLeast.Length; j++)
ZC_LUT_HH[(i << 4) | threeLeast[j]] = 10;
// Initialize the SC lookup tables
// Use an intermediate sign code lookup table that is similar to the
// one in the VM text, in that it depends on the 'h' and 'v'
// quantities. The index into this table is a 6 bit index, the top 3
// bits are (h+1) and the low 3 bits (v+1).
inter_sc_lut = new int[36];
inter_sc_lut[(2 << 3) | 2] = 15;
inter_sc_lut[(2 << 3) | 1] = 14;
inter_sc_lut[(2 << 3) | 0] = 13;
inter_sc_lut[(1 << 3) | 2] = 12;
inter_sc_lut[(1 << 3) | 1] = 11;
inter_sc_lut[(1 << 3) | 0] = 12 | INT_SIGN_BIT;
inter_sc_lut[(0 << 3) | 2] = 13 | INT_SIGN_BIT;
inter_sc_lut[(0 << 3) | 1] = 14 | INT_SIGN_BIT;
inter_sc_lut[(0 << 3) | 0] = 15 | INT_SIGN_BIT;
// Using the intermediate sign code lookup table create the final
// one. The index into this table is a 9 bit index, the low 4 bits are
// the significance of the 4 horizontal/vertical neighbors, while the
// top 4 bits are the signs of those neighbors. The bit in the middle
// is ignored. This index arrangement matches the state bits in the
// 'state' array, thus direct addressing of the table can be done from
// the sate information.
for (i = 0; i < (1 << SC_LUT_BITS) - 1; i++)
{
ds = i & 0x01; // significance of down neighbor
us = (i >> 1) & 0x01; // significance of up neighbor
rs = (i >> 2) & 0x01; // significance of right neighbor
ls = (i >> 3) & 0x01; // significance of left neighbor
dsgn = (i >> 5) & 0x01; // sign of down neighbor
usgn = (i >> 6) & 0x01; // sign of up neighbor
rsgn = (i >> 7) & 0x01; // sign of right neighbor
lsgn = (i >> 8) & 0x01; // sign of left neighbor
// Calculate 'h' and 'v' as in VM text
h = ls * (1 - 2 * lsgn) + rs * (1 - 2 * rsgn);
h = (h >= - 1)?h:- 1;
h = (h <= 1)?h:1;
v = us * (1 - 2 * usgn) + ds * (1 - 2 * dsgn);
v = (v >= - 1)?v:- 1;
v = (v <= 1)?v:1;
// Get context and sign predictor from 'inter_sc_lut'
SC_LUT[i] = inter_sc_lut[(h + 1) << 3 | (v + 1)];
}
inter_sc_lut = null;
// Initialize the MR lookup tables
// None significant, prev MR off
MR_LUT[0] = 16;
// One or more significant, prev MR off
for (i = 1; i < (1 << (MR_LUT_BITS - 1)); i++)
{
MR_LUT[i] = 17;
}
// Previous MR on, significance irrelevant
for (; i < (1 << MR_LUT_BITS); i++)
{
MR_LUT[i] = 18;
}
// Initialize the distortion estimation lookup tables
// fs tables
for (i = 0; i < (1 << MSE_LKP_BITS_M1); i++)
{
// In fs we index by val-1, since val is really: 1 <= val < 2
val = (double) i / (1 << MSE_LKP_BITS_M1) + 1.0;
deltaMSE = val * val;
//UPGRADE_WARNING: Data types in Visual C# might be different. Verify the accuracy of narrowing conversions. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1042'"
FS_LOSSLESS[i] = (int) System.Math.Floor(deltaMSE * ((double) (1 << MSE_LKP_FRAC_BITS)) + 0.5);
val -= 1.5;
deltaMSE -= val * val;
//UPGRADE_WARNING: Data types in Visual C# might be different. Verify the accuracy of narrowing conversions. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1042'"
FS_LOSSY[i] = (int) System.Math.Floor(deltaMSE * ((double) (1 << MSE_LKP_FRAC_BITS)) + 0.5);
}
// fm tables
for (i = 0; i < (1 << MSE_LKP_BITS); i++)
{
val = (double) i / (1 << MSE_LKP_BITS_M1);
deltaMSE = (val - 1.0) * (val - 1.0);
//UPGRADE_WARNING: Data types in Visual C# might be different. Verify the accuracy of narrowing conversions. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1042'"
FM_LOSSLESS[i] = (int) System.Math.Floor(deltaMSE * ((double) (1 << MSE_LKP_FRAC_BITS)) + 0.5);
val -= ((i < (1 << MSE_LKP_BITS_M1))?0.5:1.5);
deltaMSE -= val * val;
//UPGRADE_WARNING: Data types in Visual C# might be different. Verify the accuracy of narrowing conversions. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1042'"
FM_LOSSY[i] = (int) System.Math.Floor(deltaMSE * ((double) (1 << MSE_LKP_FRAC_BITS)) + 0.5);
}
}
}
}
}