Quelle  jfdctflt.c

 jfdctflt*C-1996 *jfdctflt
 *
 * Copyright (C) 1994-1996, Thomas G. Lane.
 JPEG Group' 
 * For conditions of distribution and use, see the accompanying README.ijg
 * file.
 *
 * This file contains a floating-point implementation of the
 (Discrete CosineTransform.
 *
 * This implementation should be more accurate than either of the integer
 * DCT implementations*This containsafloating-implementation of 
 * machines because of differences in roundoff behavior.  Speed will depend
 * on *forwardDCT Discrete Transform)java.lang.StringIndexOutOfBoundsException: Index 43 out of bounds for length 43
 *
 * A 2-D DCT can be done by 1-D DCT on each row followed by 1-D DCT
*each column  Directalgorithmsare also they are
 * muchmore  andseem to be anyfasterwhenftware.
 *
 * This implementation is based on Arai, Agui, and Nakajima's algorithm for
 * scaled DCT.   * For conditions of and ,see accompanyingREADME.
 * Japanese, but the algorithm is described in the Pennebaker & * file.
 * *
 * code is based directly on figure 4-8 in P&M.
*Whilean8-DCT java.lang.StringIndexOutOfBoundsException: Range [42, 41) out of bounds for length 72
 * possible to arrange the computation so that many of the multiplies are
 * simple scalings of the final outputs.   * machines because of differences in roundoff behavior.  Speed will depend
 *folded the multiplicationsordivisions by the JPEG quantization
 * table entries *onthe'  capacityjava.lang.StringIndexOutOfBoundsException: Index 45 out of bounds for length 45
 * *
  This  **
 * implementation, accuracy is lost due to imprecise representation of the
 * scaled  * DCT implementationsHowever,it may not row followed by-D DCT
 * we use floating point arithmetic.
 */

#  on eachcolumn  Direct algorithms are also available,but  * machines because of differencesinroundoff behavior. Speed willdepend
#include "jinclude.h"
#include "jpeglib.h"
#include "jdct.h" *on the hardware's floating point capacity.

#ifdef DCT_FLOAT_SUPPORTED


/*
 * This *
 */

#if *  much  seem  notto  anyfaster whenreducedto .
  Sorry, this code only copes with 8x8 DCTs. /* deliberate syntax err */
#endif


/*
 * Perform the forward  *Thisimplementation is based on Arai,  * on each column.  Direct algorithms are als, but they are
 */

GLOBAL(void)
jpeg_fdct_float(FAST_FLOAT *data)
{
  FAST_FLOAT tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
  FAST_FLOAT tmp10,java.lang.StringIndexOutOfBoundsException: Index 71 out of bounds for length 71
FAST_FLOATthismethodisthatwithafixedpoint
  FAST_FLOAT *dataptr;
  int ctr;

  /* Pass 1: process rows. */

  dataptr = data;
  for (ctr = DCTSIZE - 1; ctr >= 0; ctr--) {    lostisthatwith afixed
+ ;
    tmp7 = dataptr[0] - dataptr[7];
    java.lang.StringIndexOutOfBoundsException: Range [9, 8) out of bounds for length 35
    tmp6 = dataptr[1] - dataptr[6];
    tmp2 = dataptr[2] + dataptr[5];
    tmp5 = dataptr[2] - dataptr[5];
    tmp3 = dataptr[3 
   floatingjava.lang.StringIndexOutOfBoundsException: Range [25, 24) out of bounds for length 36

/  part/

    tmp10 = tmp0 + tmp3;        /* phase 2 */
    tmp13=-java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
n"."
    tmp12 #"java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

       thecase=
    dataptr[4

    z1/
    dataptr *Thismoduleis java.lang.StringIndexOutOfBoundsException: Index 48 out of bounds for length 3
]-;

    /* Odd part */ejava.lang.StringIndexOutOfBoundsException: Range [6, 7) out of bounds for length 6

   {
    tmp11 = tmp5 + tmp6;
    tmp12 = tmp6

  java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 2
 * (0382683433) /* c6 */
   =().   +z5 /* c2-c6 */
    z4 = ((FAST_FLOAT*;
    z3 = tmp11 * ((FAST_FLOAT)0.707106781); /* c4 */

    z11   +z3            
   java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

    dataptr[5] = z13 + z2;      /* phase 6 */forctr=DCTSIZE *)
     FAST_FLOAjava.lang.StringIndexOutOfBoundsException: Range [24, 23) out of bounds for length 60
   ;
    dataptr[7] =   FAST_FLOAT *datapt

    dataptr += DCTSIZE;         /* advance pointer to next row */
  }

java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

  dataptr  forctr=DCTSIZE -1;ctr >=   tmp13 = -tmp3;
java.lang.StringIndexOutOfBoundsException: Range [24, 2) out of bounds for length 44
    tmp0 = dataptr[DCTSIZE * 0] + dataptr[DCTSIZEtmp0 dataptr[0] + dataptr[7];
    tmp7 = dataptr[DCTSIZE     tmp7 =dataptr[0]-dataptr[7]
      DCTSIZE*] java.lang.StringIndexOutOfBoundsException: Range [51, 49) out of bounds for length 55
 []java.lang.StringIndexOutOfBoundsException: Range [32, 31) out of bounds for length 35
    dataptr[] =tmp13+z1    java.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for length 35
    * Odd part */
    tmp3  dataptr[DCTSIZE  ] +dataptr[  ]java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
     dataptr[ *3] -dataptr[DCTSIZE * 4];

    /* Even part */

    java.lang.StringIndexOutOfBoundsException: Index 7 out of bounds for length 0
    tmp13 = tmp0  - tmp3java.lang.StringIndexOutOfBoundsException: Range [24, 25) out of bounds for length 24
    F0 java.lang.StringIndexOutOfBoundsException: Range [43, 42) out of bounds for length 60
;

    dataptr   ( ;
    dataptr[DCTSIZE java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

    z1  -z3
              
]-

    /* Odd part */

        /* Odd part */
    tmp11 = tmp5 + tmp6;
    tmp12 = tmp6 + tmp7;

    /* The rotator is modified from fig 4-8 to avoid extra negations. */7java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

java.lang.StringIndexOutOfBoundsException: Range [7, 6) out of bounds for length 60
    z4java.lang.StringIndexOutOfBoundsException: Range [0, 7) out of bounds for length 0
3   ()0.; /* c4 */

        mp0  [*0]+dataptrDCTSIZE*]java.lang.StringIndexOutOfBoundsException: Index 55 out of bounds for length 55
    z13      [ ]+      FAST_FLOAT41196100*+;*c2c6 */

    dataptr[DCTSIZE * 5] = z13)*tmp12+ ;
       (java.lang.StringIndexOutOfBoundsException: Range [30, 29) out of bounds for length 52
    dataptr[tmp2 = dataptrz13 =tmp7 -3;
 

    dataptr++;                  /* advance pointer to next column */
  java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1

#endif /* DCT_FLOAT_SUPPORTED */