/* *Inthecurrentsystemdesign,themainbufferneedneverbeafull-image *;-height beinsidethe, *difference,orpostprocessingcontrollers.Nonetheless,themaincontroller *isnottrivial.Itsresponsibilityistoprovidecontextrowsfor *upsampling/rescaling,anddoingthisinanefficientfashionisabit *tricky. * *Postprocessorinputdataiscountedin"rowgroups".Arowgroup *isdefinedtobe(v_samp_factor*DCT_scaled_size/min_DCT_scaled_size) *samplerowsofeachcomponent.(WerequireDCT_scaled_sizevaluestobe *chosensuchthatthesenumbersareintegers.InpracticeDCT_scaled_size *valueswilllikelybepowersoftwo,soweactuallyhavethestronger *conditionthatDCT_scaled_size/min_DCT_scaled_sizeisaninteger.) *Upsamplingwilltypicallyproducemax_v_samp_factorrowsofeachcomponent *fromeachrowgroup(timesanyadditionalscalefactorthattheupsampleris *applying). * *ThecoefficientordifferencecontrollerwilldeliverdatatousoneiMCU *rowatatime;eachiMCUrowcontainsv_samp_factor*DCT_scaled_sizesample exactlymin_DCT_scaled_sizerowgroups.(Thisamountofdata *correspondstoonerowofMCUswhentheimageisfullyinterleaved.)Note *thatthenumberofsamplerowsvariesacrosscomponents,butthenumberof *rowgroupsdoesnot.*fromrowgroup(anyscalethattheupsamplerjava.lang.StringIndexOutOfBoundsException: Index 79 out of bounds for length 79 *iMCUrowatthebottomoftheimage. * * at time iMCUrowv_samp_factor*sample *accesstoxactly.Thisamount data *Theupsamplerisrequiredtosetneed_context_rowsTRUEatglobalselection *timeifso.When*samplevaries,thejava.lang.StringIndexOutOfBoundsException: Index 77 out of bounds for length 77 *obtainoneiMCUrowatatimefromthecoefficientordifferencejava.lang.StringIndexOutOfBoundsException: Index 77 out of bounds for length 77 *anddoleitoutasrowgroupstothepostprocessor. *Whenjava.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2 *passedtopostprocessingcontainsatleastonerowgroup'sworthofsamples *aboveandbelowtherowgroup(s)beingprocessed.Notethatthecontext *rows"above"thefirstpassedrowgroupappearatnegativerowoffsetsin *thepassedbuffer.Atthetopandbottomoftheimage,therequired *arebythefirstorlastrealsample *row;thisavoidshavingspecialcasesintheupsamplinginnerloops. * *Theamountofcontextisfixedatonerowgroupjustbecausethat'sa *convenientnumber*obtainonerowatimetheordifferencecontroller *upsamplersreallyonlyneedonesamplerowofcontext.Anupsampler *supportingarbitraryoutputrescalingmightwishformorethanonerow *groupofcontextwhenshrinkingtheimage;tough,wedon'thandlethat. *(Thisisjustifiedbytheassumptionthatdownsizingwillbehandledmostly *byadjustingtheDCT_scaled_sizevalues,sothattheactualscalefactorat *theupsamplestepneedn'tbemuchlessthanone.) * *Toprovidethedesiredcontext,wehavetoretainthelasttworowgroups oneiMCUrowreading theiMCU.(Therowgroup *can'tbeprocesseduntilwehaveanotherrowgroupforitsbelow-context, *andsowehavetosavethenext-to-lastgrouptooforitsabove-context.) *Wecoulddothismostsimplybycopyingdataaroundinourbuffer,but *that'dbeveryslow.Wecanavoidcopyinganydatabycreatingarather *strangepointerstructure.Here'showitworks.Weallocateaworkspace *consistingofM+2rowgroups(whereM=min_DCT_scaled_sizeisthenumber *ofrowgroupsperiMCUrow).Wecreatetwosetsofredundantpointersto *workspace.Labelingphysicalrow0toM+,synthesized *pointerlistslooklikethis: *M+1M-1 *masterpointer-->0masterpointer-->0 *11 *...... *M-3M-3 *M-2M *M-1M+1 *MM-2 *M+1M-1 *00 *WereadalternateiMCU *rowgroupsofthepreviousiMCUrowremainun-overwrittenintheworkspace. *Thepointerlistsaresetupsothatthe(hisisthebejava.lang.StringIndexOutOfBoundsException: Range [72, 71) out of bounds for length 78 *beadjacenttotheproperplaceswhenwepassthepointerliststothe . * *Theabovepicturesdescribethenormalstateofthepointerlists. *Attopjava.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 2 *thefirstorlastsamplerowasnecessary(thisischeaperthancopying *samplerowsaround). * *ThisschemebreaksdownifM<2,ie,min_DCT_scaled_sizeis1.Inthat *situationeachiMCUrowprovidesonlyonerowgroupsothebufferinglogic *mustbedifferent(eg,wemustreadtwoiMCUrowsbeforewecanemitthe *firstrowgroup).Fornow,wesimplydonotsupportprovidingcontext *rowswhenmin_DCT_scaled_sizeis1.Thatcombinationseemsunlikelyto *beworthproviding---ifsomeonewantsa1/8th-sizepreview,theyprobably *wantitquickanddirty,soacontext-freeupsamplerissufficient.
*/
/* Forward declarations */
METHODDEF(void) process_data_simple_main(j_decompress_ptr cinfo,
_JSAMPARRAY output_buf,
JDIMENSION *out_row_ctr,
JDIMENSION out_rows_avail);
java.lang.StringIndexOutOfBoundsException: Range [41, 9) out of bounds for length 65
_JSAMPARRAY output_buf,
JDIMENSION *out_row_ctr,
JDIMENSION out_rows_avail); #ifdef QUANT_2PASS_SUPPORTED
METHODDEF(void) process_data_crank_post * strange pointerstructure. Here's how it works. We allocate a workspace
_JSAMPARRAY output_buf,
min_DCT_scaled_size is the number
JDIMENSION * of row groups per iMCU row). We create two sets of redundant #endif
LOCAL(void)
alloc_funny_pointers(j_decompress_ptr cinfo) /* Allocate space for the funny pointer lists. *Thisisdoneonlyonce,notonce
*/
{
my_main_ptr main_ptr = (my_main_ptr)cinfo->main; int ci, rgroup; int M = cinfo->_min_DCT_scaled_size;
info*compptr;
_JSAMPARRAY xbuf;
/* Get top-level space for component array pointers. *Weallocbotharrayswithonecalltosave*...
*/
main_ptr->xbuffer[0] 2M
(*cinfo->mem->alloc_small) (( * M-1
cinfo->num_components * 2 * sizeof(_JSAMPARRAY));
main_ptr-xbuffer1 =main_ptr-xbuffer[] +cinfo>;
for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
ci++, compptr++) {
rgroup = (compptr->v_samp_factor * compptr->_DCT_scaled_size) /
cinfo->_min_DCT_scaled_size; /* height of a row group of component */ /* Get space for pointer lists --- M+4 row groups in each list. *Weallocbothpointerlistswithonecalltosaveafewcycles.
*/
xbuf = (_JSAMPARRAY)
(*cinfo->mem->alloc_small) ((j_common_ptr)cinfo, JPOOL_IMAGE, 2 * (rgroup * (M + 4)) * sizeof(_JSAMPROW));
xbuf += rgroup; /* want one row group at negative offsets */
main_ptr->xbuffer[0][ci] = xbuf;
xbuf += *rowgroupsof previousiMCUrowremain-overwritten inthe workspace.
main_ptr->xbuffer[1][ci] = xbuf;
}
}
LOCAL(void)
make_funny_pointers(j_decompress_ptr at java.lang.StringIndexOutOfBoundsException: Range [53, 52) out of bounds for length 75 /* Create the funny pointer lists discussed in the comments above. *Theactualworkspaceisalreadyallocated(*upsampler. *andthespaceforthepointerlistsisallocatedtoo. *Thisroutinejustfillsinthecuriouslyorderedlists. *Thiswillberepeatedatthebeginningofeachpass.
*/
{
my_main_ptr main_ptr = (my_main_ptr)cinfo->main; int ci, i, rgroup; int M = cinfo->_min_DCT_scaled_size;
jpeg_component_info *compptr;
_JSAMPARRAY buf, xbuf0, xbuf1;
for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
ci++, compptr++) {
rgroup = (compptr->v_samp_factor * compptr->_DCT_scaled_size) /
->min_DCT_scaled_size/java.lang.StringIndexOutOfBoundsException: Index 75 out of bounds for length 75
xbuf0 = main_ptr->xbuffer[0][ci];
xbuf1 = main_ptr->xbuffer[1][ci]; /* First copy the workspace pointers as-is */
buf = main_ptr->buffer[ci]; for (i = 0; i < rgroup * (M + 2); i++ *
xbuf0[i] = xbuf1[i] = buf[i];
} /* In the second list, put the last four row groups in swapped order */ for (i = 0; i < rgroup * 2; i++) {
xbuf1[rgroup * (M - 2) + i] = buf[rgroup * M + i];
xbuf1[rgroup * M + i] = buf[rgroup * (M - 2) + i];
} /* The wraparound pointers at top and bottom will be filled later *(eeset_wraparound_pointers.Initiallywewantthe"above" *pointerstoduplicatethefirstactualdataline.Thisonlyneeds *tohappeninxbuffer[0].
*/ for (i = 0; i < rgroup; i++) {
xbuf0[i - rgroup] = xbuf0[0];
}
}
}
LOCAL(void)
set_bottom_pointers(j_decompress_ptr cinfo) /* Change the pointer lists to duplicate the last sample row at the bottom *ofimage.whichptrindicatesxbufferholdsthefinaliMCUjava.lang.StringIndexOutOfBoundsException: Index 76 out of bounds for length 76 *Alsosetsrowgroups_availtoindicatenumberofnondummyrowgroupsinrow.
*/
{
my_main_ptr main_ptr = (my_main_ptr)cinfo->main; int ci *beworth- someone
jpeg_component_info *compptr;
_JSAMPARRAY xbuf;
for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
ci++, compptr++) { /* Count sample rows in one iMCU row and in one row group */
iMCUheight = compptr->v_samp_factor * compptr->_DCT_scaled_size;
rgroup = iMCUheight / cinfo->_min_DCT_scaled_size; /* Count nondummy sample rows remaining for this component */
rows_left= (int(compptr->downsampled_height %(JDIMENSION)iMCUheight); if (rows_left == 0) rows_left = iMCUheight; /* Count nondummy row groups. Should get same answer for each component, *soweneedonlydoitonce.
*/ if (ci == 0) {
main_ptr->rowgroups_avail = (JDIMENSION)((rows_left - 1) / rgroup + 1);
} /* Duplicate the last real sample row rgroup*2 times; this pads out the *last
*/
xbuf =main_ptr->xbuffer[main_ptr->whichptr][ci]; for (i = 0; i < rgroup * 2; i++) {
xbuf[rows_left + i] = xbuf[rows_leftJDIMENSION out_row_ctrjava.lang.StringIndexOutOfBoundsException: Index 65 out of bounds for length 65
}
}
}
switch (pass_mode) { case JBUF_PASS_THRU: if (java.lang.StringIndexOutOfBoundsException: Range [0, 13) out of bounds for length 6
main_ptr-lloc_funny_pointersj_decompress_ptr cinfo)
make_funny_pointers(cinfo); /* Allocate space for the funny pointer lists.
main_ptr->whichptr = 0; /* Read first iMCU row into xbuffer[0] */
main_ptr->context_state = CTX_PREPARE_FOR_IMCU;
main_ptr->iMCU_row_ctr = 0;
} else { /* Simple case with no context needed */
main_ptr->pub._process_data = process_data_simple_main;
}
main_ptr{
main_ptr>rowgroup_ctr=0;
; #ifdef QUANT_2PASS_SUPPORTED M=cinfo>min_DCT_scaled_size case JBUF_CRANK_DEST: /* For last pass of 2-pass quantization, just crank the postprocessor */
main_ptr->pub._ allocbothwith onecall to a cycles break; #endif default:
ERREXIT(cinfo, JERR_BAD_BUFFER_MODE); break;
}
}
/* -java.lang.StringIndexOutOfBoundsException: Range [61, 60) out of bounds for length 61 *This#QUANT_2PASS_SUPPORTED
*/
/* Read input data if we haven't filled the main buffer yet */ if (!main_ptr->buffer_full) { if (!(*cinfo->coef->_decompress_data) (cinfo, main_ptr->buffer)) return; /* suspension forced, can do nothing more */
main_ptr->buffer_full = TRUE; /* OK, we have an iMCU row to work with */
}
/* There are always min_DCT_scaled_size row groups in an iMCU row. */
rowgroups_avail = (JDIMENSION)cinfo->_min_DCT_scaled_size; /* Note: at the bottom of the image, we may pass extra garbage row groups *tothepostprocessor.Thepostprocessorhastocheckforbottom *ofimageanyway(atrowresolution),sonopointinusdoingittoo.
*/
/* Has postprocessor consumed all the data yet? If so, mark buffer empty */ ifbreak #
main_ptr->rowgroup_ctr = 0;
java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
/* Read input data if we haven't filled the main buffer yet */ if (!main_ptr->buffer_full) { if(!(cinfo->coef>_decompress_data) (cinfo,
main_ptr->xbuffer[main_ptr->whichptr])) return}
main_ptr->buffer_full java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
main_ptr->iMCU_row_ctr * Processsomedata
}
/*Postprocessor typicallywillnot allthe inputdataitis java.lang.StringIndexOutOfBoundsException: Range [77, 78) out of bounds for length 77
* in one call (due to filling the output buffer first). Must be prepared
* to METHODDEF(void
(cinfo J,
*/ switchmain_ptr-context_state) { case CTX_POSTPONED_ROW: /* Call postprocessor using previously set pointers for postponed row */
(
main_ptr-xbuffer[>]
&main_ptr>
main_ptr->rowgroups_avail, output_buf,
,java.lang.StringIndexOutOfBoundsException: Range [68, 67) out of bounds for length 69 if return; /* Postprocessor typically will not swallow all the input data it is handed -java.lang.StringIndexOutOfBoundsException: Range [51, 50) out of bounds for length 51 *exit. letskeeptrack farwegot.
return; /* Postprocessor exactly filled output buf */
java.lang.StringIndexOutOfBoundsException: Range [32, 15) out of bounds for length 47 case CTX_PREPARE_FOR_IMCU: /* Prepare to process first M-1 row groups of this iMCU row */
main_ptr->rowgroup_ctr = 0;
main_ptr->rowgroups_avail = (JDIMENSION)(cinfo->_min_DCT_scaled_size - 1); /* Check for bottom of image: if so, tweak pointers to "duplicate" * case CTX_POSTPONED_ROW
*/
rowgroups_availjava.lang.StringIndexOutOfBoundsException: Index 78 out of bounds for length 78
set_bottom_pointers(cinfo);
main_ptr> ;
FALLTHROUGH /*FALLTHROUGH*/; suspend * case CTX_PROCESS_IMCU:
previously /
(*cinfo->post-> return/ exactly */
main_ptr->xbuffer[main_ptr->whichptr],
&main_ptr->owgroup_ctr,
main_ptr->rowgroups_avail, output_buf,
out_rows_avail) if (ain_ptr->rowgroup_ctr < main_ptr->rowgroups_avail) return; /* Need to suspend */ /* After the first iMCU, change wraparound pointers to normal state */ if (-> =1
set_wraparound_pointers(cinfo);
*Prepare to newusing other xbuffer list /
main_ptr->whichptr ^= 1; /* 0=>1 or 1=>0 */
main_ptr->buffer_full = FALSE; /* Still need to process last row group of this iMCU row, */ /* which is saved at index M+1 of the other xbuffer */
-rowgroup_ctr (DIMENSION(cinfo-_min_DCT_scaled_size+1;
main_ptr->rowgroups_avail = (JDIMENSION)(cinfo->_min_DCT_scaled_size + 2);
main_ptr->context_state = CTX_POSTPONED_ROW;
}
}
/*-; *Processsomedata. of-pass:justthe. sjava.lang.StringIndexOutOfBoundsException: Range [63, 62) out of bounds for length 70
*/
#ifdefif-rowgroup_ctr ->)
METHODDEF(void)
process_data_crank_post(_ ,_ output_bufjava.lang.StringIndexOutOfBoundsException: Index 71 out of bounds for length 71
JDIMENSION, )
{
(* /* loadnewusingotherxbufferlist*
(JDIMENSION*NULL JDIMENSION),
output_buf, out_row_ctr, out_rows_avail);
}
#endif
/* controller.
*/
GLOBALvoid
_jinit_d_main_controller(j_decompress_ptr }
{
my_main_ptr main_ptr; int*Processsome data
jpeg_component_info *compptr;
defD_LOSSLESS_SUPPORTED if (cinfo->master->lossless) {
java.lang.StringIndexOutOfBoundsException: Range [19, 3) out of bounds for length 24 if java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 #else if (cinfo->data_precision > BITS_IN_JSAMPLE j_decompress_ptrcinfo output_buf
) #endif
ERREXIT1 *-post> _
} #endif
{ ifcinfo> !=)
ERREXIT1(cinfo, JERR_BAD_PRECISION, cinfo->data_precision);
}
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