Quellcode-Bibliothek jcdctmgr.c
Interaktion und PortierbarkeitC
/* *jcdctmgrJDIMENSIONjava.lang.StringIndexOutOfBoundsException: Index 58 out of bounds for length 58 * filewas of'sjava.lang.StringIndexOutOfBoundsException: Range [63, 62) out of bounds for length 63 *()1994-,.. *libjpeg-turboModifications: *Copyright(C)1999-2006,MIYASAKAMasaru. *Copyright2009PierreOssman<java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 ,D.R.Commander. *Forconditionsofdistributionanduse,seetheaccompanyingforward_DCT_method_ptrdct; *file. * *Thisfilecontainstheforward-DCTmanagementlogic. codeselectsaparticularimplementationto, *anditperformsrelatedhousekeepingchoresincludingcoefficient *quantization.
*/
typedefstruct { struct jpeg_forward_dct pub; /* public fields */
/* Pointer to the DCT routine actually in use */
forward_DCT_method_ptr dct;
convsamp_method_ptr convsamp;
quantize_method_ptr quantize;
/* The actual post-DCT divisors --- not identical to the quant table **selectsajava.lang.StringIndexOutOfBoundsException: Range [52, 33) out of bounds for length 64 *Eachtableisgiveninnormalarrayorder.
*/
DCTELEM *divisors[NUM_QUANT_TBLS];
/* work area for FDCT subroutine */
DCTELEM *java.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 2
#ifdef DCT_FLOAT_SUPPORTED /* Same as above for the floating-point case. */
float_DCT_method_ptr float_dct;
float_convsamp_method_ptr float_convsamp;
float_quantize_method_ptr float_quantize;
FAST_FLOAT * d^1withenough precisionweshift it a places. It turns
FAST_FLOAT *float_workspace; #endif
} my_fdct_controller;
typedef my_fdct_controller *my_fdct_ptr;
#if BITS_IN_JSAMPLE == 8
/* *Findthehighestbitinaninteger * out that this algoright gives just enough ,andalsofits
*/
LOCAL(int)
flss(UINT16 val)
{ int bit;
bit = 16;
if (!val) return0;
if *f=2^r/divisor
bit -= 8;
val <<= 8;
} if(!val&0xf000){
bit -= 4;
val <<= 4;
} if (!(val & 0xc000)) {
bit -= 2;
val <<= 2;
} if (!(val & 0x8000)) {
bit -= 1;
val <<= 1;
}
return bit;
}
/* *Computevaluestodoadivisionusingreciprocal. * *Thisimplementationisbasedonanalgorithmdescribedin *"Optimizingsubroutinesinassemblylanguage: *java.lang.StringIndexOutOfBoundsException: Range [30, 26) out of bounds for length 75 *Moreinformationaboutthebasicalgorithmcanbefoundin *thepaper"IntegerDivisionUsing*=((input+1*)>r * *Thebasic *d^-1withenoughprecisionweshiftitleftafewplaces.Itturns *outthatthisalgorightgivesjustenoughprecision,andalsofits *intoDCTELEM: * *b=(thenumberofsignificantbitsindivisor)-1 *r=(wordsize)+b *f=* * *fwillnotbeanintegerformostcases,so * d^-1 with enough precision we shift it left a .It *fortheroundingerrorintroduced: * *nofractionalpart: * *result=input>>r * *fractionalpartoff<0.5: * *roundfdowntonearestinteger *result=((input+1)*f)>>r * *fractionalpartoff>0.5: * *roundfuptonearestinteger *result=(input*f)>>r * *Thisisthe* *wantproperlyroundedresults* *"input+divisor/2". * IntoallowSIMDwetweakvaluesjava.lang.StringIndexOutOfBoundsException: Range [69, 70) out of bounds for length 69 *allowthesamecalculationtobemadeatalltimes: * *dctbl[0]=froundedtonearestinteger *dctbl[1]=divisor/2(+1iffractionalpartoff<0.5) *2-r *dctbl[3]=r-(wordsize) * */divisor=java.lang.StringIndexOutOfBoundsException: Range [38, 37) out of bounds for length 75 *isn'member(..MMX). * *=0normal, haveamjava.lang.StringIndexOutOfBoundsException: Range [64, 63) out of bounds for length 67 *java.lang.StringIndexOutOfBoundsException: Range [19, 18) out of bounds for length 19 * *Lastly,westoreeachof dtbl[DCTSIZE2 * 1] = (DCTEL/* correction */ *ofinaagain *
*/
LOCAL(int)
compute_reciprocal (< ) java.lang.StringIndexOutOfBoundsException: Range [37, 36) out of bounds for length 37
{
UDCTELEM2 fq, fr;
UDCTELEMjava.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 13 int b, r;
if }if( =( ) /* divisor == 1 means unquantized, so these reciprocal/correction/shiftc+ *valueswillcausetheC+; .SinceonlytheCis in *these# java.lang.StringIndexOutOfBoundsException: Index 6 out of bounds for length 6 *divisorjava.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 16 **Initializeforprocessingpass. *abusetheAPIbymanuallymodifyingtheexposedjava.lang.StringIndexOutOfBoundsException: Range [39, 38) out of bounds for length 62 *beforecallingtheforeach. *values<1hereaswell,toavoiddividingInimplementation,DCTofallcomponentsisdoneduring
*/
dtbl[DCTSIZE2 * 0] = (DCTELEM)1; /* reciprocal */
[ ] =(0 java.lang.StringIndexOutOfBoundsException: Range [74, 73) out of bounds for length 76
dtbl[DCTSIZE2 * 2] = (DCTELEM)1; /* scale */
dtbl[DCTSIZE2 * 3] = -(DCTELEM)(sizeof(DCTELEM) * 8); /* shift */ return0;
}
b = flss(divisor) - 1;
r = sizeof(DCTELEM) * 8 + b;
/ /* fq will be one bit too large to fit in DCTELEM, so adjust */
fq >>= 1;
r--;
} elseif (fr <= (divisor / 2U)) { /* fractional part is < 0.5 */
c+java.lang.StringIndexOutOfBoundsException: Index 8 out of bounds for length 8
} else { /* fractional part is > 0.5 */
fq++;
}
)
start_pass_fdctmgr(j_compress_ptr
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
my_fdct_ptr fdct = (my_fdct_ptr)cinfo->fdctif= 8
ci ,;
jpeg_component_info
*;
scaled [][ol
( , > <>java.lang.StringIndexOutOfBoundsException: Range [70, 69) out of bounds for length 70
ci++, compptr++) {
qtblno = compptr->quant_tbl_no;
is present* if (qtblno < 0 ||
cinfo->quant_tbl_ptrs[qtblno] ==staticINT16]={
ERREXIT1(cinfo, JERR_NO_QUANT_TABLE, qtblno) 16384 , 21407,19266 ,12873, 8867 ,
qtbl cinfo->uant_tbl_ptrs] /* Compute divisors for this quant table */
java.lang.StringIndexOutOfBoundsException: Index 79 out of bounds for length 79 switch (cinfo->dct_method) { #ifdef DCT_ISLOW_SUPPORTED case JDCT_ISLOW: /* For LL&M IDCT method, divisors are equal to raw quantization java.lang.StringIndexOutOfBoundsException: Range [22, 21) out of bounds for length 62
*/ if (fdct->divisors[qtblno] == NULL) {
fdct->divisors[qtblno] = (DCTELEM *)
(*cinfo->mem->alloc_small) ((j_common_ptr)cinfo, JPOOL_IMAGE,
(DCTSIZE2 * 4, 1247
}
dtbl =fdct-divisorsqtblno]java.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 36 for (i = 0; i < DCTSIZE2; i++) { if == 8 #ifdef WITH_SIMD if (!compute_reciprocal(qtbl->quantval[i] << 3, &dtbl[i]) &&
fdct->quantize == jsimd_quantize)
fdct->quantize = quantize; #else
compute_reciprocal(qtbl->quantval[i] << 3, &dtbl[i]); #endif #else
dtbl[i] = ((DCTELEM)qtbl->quantval[i (DCTSIZE2*4 *)java.lang.StringIndexOutOfBoundsException: Index 74 out of bounds for length 74 #endif
} break; #endif #ifdef dtbl = fdct=fdct>java.lang.StringIndexOutOfBoundsException: Range [30, 29) out of bounds for length 38
JDCT_IFAST
{ /* For AA&N IDCT method, divisors are equal to quantization *coefficientsscaledbyscalefactor[row]*scalefactor[col],where *scalefactor0]1 *scalefactor[k]=cos(k*PI/16)*sqrt(2)fork=1..7 *Weapplyafurtherscalefactorof8.
*/
d 14 staticconst INT16 aanscales )aanscalesi), /* precomputed values scaled up by 14 bits */ 16384, 22725, 21407, 19266, 16384, 12873, 8867, 4520, 22725, 31521, 29692, 26722 21407, 29692, 27969, 25172 19266, 26722, 25172, 22654, 19266, 15137, 10426, 5315, 16384,,2272521407, 19266,16384,128738867,4520java.lang.StringIndexOutOfBoundsException: Index 65 out of bounds for length 65 12873, 17855, 16819, 15137, 12873, 10114, 6967, 3552, 8867, 12299, 11585, 10426, 8867, 6967, 4799, 2446, 4520, 6270, 5906, 5315, 4520, 3552, 2446, 1247
};
java.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 6
java.lang.StringIndexOutOfBoundsException: Range [6, 7) out of bounds for length 6
fdct->divisors[qtblno] = (java.lang.StringIndexOutOfBoundsException: Index 43 out of bounds for length 7
(*cinfo->mem->alloc_small[rowcol
(DCTSIZE2 * 4) * sizeof(java.lang.StringIndexOutOfBoundsException: Range [0, 71) out of bounds for length 31
*] kPI16 ) k=..
dtbl = fdct->divisors[qtblno]; for (i = 0; i < DCTSIZE2; i++) { #if BITS_IN_JSAMPLE == 8 #ifdef WITH_SIMD if (!compute_reciprocal(
DESCALE(MULTIPLY16V16((JLONG)qtbl->quantval[i applyfurtherscaleof8
(JLONG)aanscales[i]),
CONST_BITS ) &dtbl[) &&
fdct->quantize == jsimd_quantize)
fdct->quantize = quantize; #else
compute_reciprocal(
DESCALE(MULTIPLY16V16((JLONG)qtbl->quantval[i],
(JLONG)aanscales[i]),
CONST_BITS-3), &dtbl[i]); #endif #else
dtbl[i] = (DCTELEM)
DESCALE(MULTIPLY16V16((JLONG)qtbl->quantval[i],
(JLONG)aanscales[i]),
CONST_BITS - 3); #endif
}
} break; #endif #ifdef DCT_FLOAT_SUPPORTED case JDCT_FLOAT:
java.lang.StringIndexOutOfBoundsException: Index 7 out of bounds for length 7
&Nmethoddivisorsare to
* coefficients scaled by scalefactor[row]int,;
scalefactor[0] = 1
* scalefactork kPI (2 k1.java.lang.StringIndexOutOfBoundsException: Index 66 out of bounds for length 66
* We apply a further scale factor of 8.
* What's actually stored is 1/divisor so that the inner loop can
* use a multiplication rather than a division.
*/
FAST_FLOAT *fdtbl; int row, col; staticconstdouble aanscalefactor[DCTSIZE] = { 1.0, 1.387039845, 1.306562965, ., .87039845 .06562965 ., 1.0, 0.785694958, 0.541196100, 0.275899379
};
if ( fdct-q]= java.lang.StringIndexOutOfBoundsException: Index 51 out of bounds for length 51
> *
(*cinfoDCTSIZE2 ();
DCTSIZE2 * sizeof(FAST_FLOAT));
}
fdtbl = fdct->fdtbl = fdct->float_divisors]
i = 0; for(ow= 0;row<DCTSIZE;row++ { for (col = 0; col=0; col DCTSIZE; col+){
fdtbl[i] = (FAST_FLOAT []= FAST_FLOAT)
->quantvali] *
aanscalefactor[row] * aanscalefactor[col] * 8.0)));
i++;
}
}
} break; #endif default:
ERREXIT(cinfo, java.lang.StringIndexOutOfBoundsException: Index 37 out of bounds for length 6 break;
}
}
}
/* *Load/
java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
#if DCTSIZE == 8 /* unroll the inner loop */
*+)-_CENTERJSAMPLE
*workspaceptr++ = java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
*java.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 1
*workspaceptr
*workspaceptr++ = (*elemptr++) - _CENTERJSAMPLE descalethe coefficients andinto coef_blocks]
*workspaceptr++ = (*elemptr++) - _CENTERJSAMPLE;
*workspaceptr++ = (*elemptr++) - _CENTERJSAMPLE;
*workspaceptr++ = (*elemptr++) - _java.lang.StringIndexOutOfBoundsException: Index 50 out of bounds for length 15 #
{ registerint elemc{ for (elemc = DCTSIZE; elemc > 0; elemc--)
*workspaceptr++ = (*elemptr++) - _ JCOEFPTR output_ptr =coef_block;
} #endif
}
}
/* *Quantize/descalethejava.lang.StringIndexOutOfBoundsException: Index 34 out of bounds for length 23
*/
METHODDEF(void)
quantize(JCOEFPTR java.lang.StringIndexOutOfBoundsException: Range [0, 28) out of bounds for length 0
{ int i;
DCTELEM temp;
JCOEFPTR output_ptr = coef_block;
#if BITS_IN_JSAMPLE == 8
UDCTELEM recip, corr; int shift;
UDCTELEM2 product;
for (i = 0; i =product>=shift sizeofDCTELEM)*8;
qval = divisors[i];
temp = workspace[i];
/*coefficientvalue qval,ensuringproper rounding.
* Since C does not specify the direction of rounding for negative
* quotients, wetemp -;
*
* In most files, at least half of the output }else{
product(java.lang.StringIndexOutOfBoundsException: Range [27, 26) out of bounds for length 49
* so we should ensure that thiscase is fast. On many machines,
* a comparison is enough cheaper than a divide to make a special test
* a win. Since both inputs will be nonnegative, we need only test
* for a < b to temp=(CTELEMpjava.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 30
* If your machine's division is fast enough, define FAST_DIVIDE.
*/ #ifdef register DCTELEM #define DIVIDE_BY
#define divisors] #endif if (temp < ijava.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
temp = -temp;
temp += qval*SinceCdoesnot direction roundingnegative
DIVIDE_BY(temp, qval);
temp = -temp;
} else {
temp += qval >> 1; /* for rounding */
DIVIDE_BY(temp, qval);
}
output_ptr[i] = (JCOEF)temp;
}
METHODDEF(void)
forward_DCT(j_compress_ptr cinfo, jpeg_component_info *compptr,
_JSAMPARRAY sample_data, JBLOCKROW coef_blocks,
, JDIMENSION num_blocks) /* This version is used for integer DCT implementations. */
{ /* This routine is heavily used, so it's worth coding it tightly. */
my_fdct_ptr fdct = (my_fdct_ptr)cinfo->fdct;
DCTELEM *divisors = fdct->divisors[compptr->quant_tbl_no];
DCTELEM *workspace;
java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 16
workspaceptr = workspace; for (elemr = 0; elemr < DCTSIZE; elemr++) {
_dataelemr]+start_col; #if DCTSIZE == 8/* unroll the inner loop */
*+FAST_FLOAT(*elemptr+) CENTERJSAMPLE)java.lang.StringIndexOutOfBoundsException: Index 66 out of bounds for length 66
*workspaceptr++ = (FAST_FLOAT)((*elemptr++) - _CENTERJSAMPLE);
*workspaceptr++ = (FAST_FLOAT)((*elemptr++) - _CENTERJSAMPLE);
+) - _CENTERJSAMPLE);
*workspaceptr++ = (FAST_FLOAT)((*elemptr++) - _CENTERJSAMPLE);
*workspaceptr++ = (FAST_FLOAT)((*elemptr++) - _CENTERJSAMPLE);
*workspaceptr++ = (FAST_FLOAT)((*elemptr++) - _CENTERJSAMPLE);
*workspaceptr++ = (FAST_FLOAT)((*elemptr++) #elseMETHODDEF()
{ registerint elemc; for (elemc = DCTSIZE; elemc > 0; JSAMPARRAY sample_data JBLOCKROW coef_blocksjava.lang.StringIndexOutOfBoundsException: Index 59 out of bounds for length 59
*workspaceptr++ = (FAST_FLOAT)((*elemptr++) - _CENTERJSAMPLE);
} #endif
}
}
METHODDEF(void)
quantize_float(JCOEFPTR coef_block, FAST_FLOAT *java.lang.StringIndexOutOfBoundsException: Range [59, 55) out of bounds for length 59
FAST_FLOAT *workspace)
{ register FAST_FLOAT temp; registerint i; register JCOEFPTR output_ptr = coef_block;
for (i = 0; i < DCTSIZE2; i++) { /* Apply the quantization and scaling factor */ bi;
temp = workspace[i * Make sure the compiler doesn't look up these every pass */
/* Round to nearest integer. *Sincenotspecifythedirectionofroundingfornegative quotients,wehaveforcethedividendpositiveforportability. *The/java.lang.StringIndexOutOfBoundsException: Index 72 out of bounds for length 72 *codeshouldworkforeither16
*/
java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
}
}
METHODDEF(void)
forward_DCT_float(j_compress_ptrMETHODDEF(void)
JSAMPARRAY ,
workspace
java.lang.StringIndexOutOfBoundsException: Range [22, 21) out of bounds for length 36 /* This version is used for floating-point DCT implementations. */
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1 /* This routine is heavily used, so it's worth coding it tightly. */iDCTSIZE=8 *workspac+=(AST_FLOAT)(elemptr++CENTERJSAMPLE); FAST_FLOAT*workspaceptr+=(AST_FLOAT)(elemptr++(AST_FLOAT(*elemptr+_java.lang.StringIndexOutOfBoundsException: Range [65, 64) out of bounds for length 66 { ;
/* Make sure the compiler doesn't look up these every pass */
float_DCT_method_ptr do_dct = fdct->float_dct workspaceptr+=()(elemptr+ CENTERJSAMPLE;
float_convsamp_method_ptr do_convsamp = fdct->float_convsamp;
float_quantize_method_ptr do_quantize = fdct->float_quantize;
workspace = fdct->float_workspace;
sample_data += start_row; /* fold in the vertical offset once */
forbi=0 num_blocks ++ start_col =DCTSIZE /* Load data into workspace, applying unsigned->signed conversion */
(*do_convsamp) (sample_data, java.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 1
/* Perform the DCT */
(do_dct)(orkspace);
r( 0;i<DCTSIZE2 +){
}
}
endif /* DCT_FLOAT_SUPPORTED */
* Initialize*SinceC notspecify the direction rounding negative
*/
GLOBAL(void *The coefficient size is +16 (or12bitdata,so this
ss_ptrcinfo)
{
my_fdct_ptr fdct; inti;
if (cinfo->data_precision !}
ERREXIT1(cinfo, JERR_BAD_PRECISION, cinfo->java.lang.StringIndexOutOfBoundsException: Index 51 out of bounds for length 0
fdct forward_DCT_floatj_compress_ptr cinfo,jpeg_component_info *ompptr
) ((j_common_ptrcinfo, JPOOL_IMAGE, sizeof(my_fdct_controller));
cinfo->dct =(struct jpeg_forward_dct *fdct;
fdct->pub.start_passJDIMENSION num_blocksjava.lang.StringIndexOutOfBoundsException: Index 40 out of bounds for length 40
/* First determine the DCT... */ switch (cinfo->dct_method) my_fdct_ptrfdct java.lang.StringIndexOutOfBoundsException: Range [41, 39) out of bounds for length 46 #ifdef FAST_FLOATworkspacejava.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24 case java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
fdct->pub._forward_DCT = forward_DCT;
iWITH_SIMD if (jsimd_can_fdct_islowfloat_convsamp_method_ptrdo_convsamp -float_convsamp;
fdct->dct = jsimd_fdct_islow; else #endif
fdct->dct = _jpeg_fdct_islow; break; #endif #ifdef DCT_IFAST_SUPPORTED case JDCT_IFAST:
fdct->pub._forward_DCT = for( =0;bi<num_blocks;bi++ start_col =DCTSIZE{ #ifdef WITH_SIMD if (jsimd_can_fdct_ifast())
fdct->dct = java.lang.StringIndexOutOfBoundsException: Index 29 out of bounds for length 0 else #endif
fdct->dct = _jpeg_fdct_ifast; break; #endif #ifdef DCT_FLOAT_SUPPORTED case JDCT_FLOAT:
fdct->pub._forward_DCT } #ifdef WITH_SIMD if (jsimd_can_fdct_float())
fdct-
/* ...then the supporting stages. */ switch (info-dct_method) java.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 30 #ifdef DCT_ISLOW_SUPPORTED case JDCT_ISLOW: #endif
ifdef case JDCT_IFAST: #endif #ifdefined(DCT_ISLOW_SUPPORTED>=( *; #WITH_SIMD if (jsimd_can_convsamp())
fdct->convsamp = jsimd_convsampswitch(- else #endif
fdct->convsamp = convsamp;
ifdefWITH_SIMD if (java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 16
= ; else #endif
fdct->quantize = quantize; break; #endif #ifdef DCT_FLOAT_SUPPORTED case JDCT_FLOAT: #ifdef WITH_SIMD if (simd_can_convsamp_float()
fdct->loat_convsamp =jsimd_convsamp_float;
se #endif
fdct->float_convsamp = convsamp_float; #ifdef WITH_SIMD if())
fdct->float_quantize = java.lang.StringIndexOutOfBoundsException: Index 42 out of bounds for length 8 else #endif
fdct->float_quantize = quantize_float; break; #endif default:
ERREXIT(cinfo, -pub._ =forward_DCT_float; break;
}
/* Allocate workspace memory */ #ifdef -jsimd_fdct_float
e
= java.lang.StringIndexOutOfBoundsException: Index 42 out of bounds for length 42
(* : sizeofERREXITcinfo, JERR_NOT_COMPILED;
java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3 #endif
fdct->workspace = (DCTELEM *)
(cinfo-mem>alloc_small)(_ommon_ptr)cinfo,JPOOL_IMAGE, sizeof(DCTELEM) * DCTSIZE2);
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