dbf-halloween2015

annotate libs/libjpeg/jdmerge.c @ 1:c3f5c32cb210

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barfed all the libraries in the source tree to make porting easier
author John Tsiombikas <nuclear@member.fsf.org>
date Sun, 01 Nov 2015 00:36:56 +0200
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nuclear@1 1 /*
nuclear@1 2 * jdmerge.c
nuclear@1 3 *
nuclear@1 4 * Copyright (C) 1994-1996, Thomas G. Lane.
nuclear@1 5 * This file is part of the Independent JPEG Group's software.
nuclear@1 6 * For conditions of distribution and use, see the accompanying README file.
nuclear@1 7 *
nuclear@1 8 * This file contains code for merged upsampling/color conversion.
nuclear@1 9 *
nuclear@1 10 * This file combines functions from jdsample.c and jdcolor.c;
nuclear@1 11 * read those files first to understand what's going on.
nuclear@1 12 *
nuclear@1 13 * When the chroma components are to be upsampled by simple replication
nuclear@1 14 * (ie, box filtering), we can save some work in color conversion by
nuclear@1 15 * calculating all the output pixels corresponding to a pair of chroma
nuclear@1 16 * samples at one time. In the conversion equations
nuclear@1 17 * R = Y + K1 * Cr
nuclear@1 18 * G = Y + K2 * Cb + K3 * Cr
nuclear@1 19 * B = Y + K4 * Cb
nuclear@1 20 * only the Y term varies among the group of pixels corresponding to a pair
nuclear@1 21 * of chroma samples, so the rest of the terms can be calculated just once.
nuclear@1 22 * At typical sampling ratios, this eliminates half or three-quarters of the
nuclear@1 23 * multiplications needed for color conversion.
nuclear@1 24 *
nuclear@1 25 * This file currently provides implementations for the following cases:
nuclear@1 26 * YCbCr => RGB color conversion only.
nuclear@1 27 * Sampling ratios of 2h1v or 2h2v.
nuclear@1 28 * No scaling needed at upsample time.
nuclear@1 29 * Corner-aligned (non-CCIR601) sampling alignment.
nuclear@1 30 * Other special cases could be added, but in most applications these are
nuclear@1 31 * the only common cases. (For uncommon cases we fall back on the more
nuclear@1 32 * general code in jdsample.c and jdcolor.c.)
nuclear@1 33 */
nuclear@1 34
nuclear@1 35 #define JPEG_INTERNALS
nuclear@1 36 #include "jinclude.h"
nuclear@1 37 #include "jpeglib.h"
nuclear@1 38
nuclear@1 39 #ifdef UPSAMPLE_MERGING_SUPPORTED
nuclear@1 40
nuclear@1 41
nuclear@1 42 /* Private subobject */
nuclear@1 43
nuclear@1 44 typedef struct {
nuclear@1 45 struct jpeg_upsampler pub; /* public fields */
nuclear@1 46
nuclear@1 47 /* Pointer to routine to do actual upsampling/conversion of one row group */
nuclear@1 48 JMETHOD(void, upmethod, (j_decompress_ptr cinfo,
nuclear@1 49 JSAMPIMAGE input_buf, JDIMENSION in_row_group_ctr,
nuclear@1 50 JSAMPARRAY output_buf));
nuclear@1 51
nuclear@1 52 /* Private state for YCC->RGB conversion */
nuclear@1 53 int * Cr_r_tab; /* => table for Cr to R conversion */
nuclear@1 54 int * Cb_b_tab; /* => table for Cb to B conversion */
nuclear@1 55 INT32 * Cr_g_tab; /* => table for Cr to G conversion */
nuclear@1 56 INT32 * Cb_g_tab; /* => table for Cb to G conversion */
nuclear@1 57
nuclear@1 58 /* For 2:1 vertical sampling, we produce two output rows at a time.
nuclear@1 59 * We need a "spare" row buffer to hold the second output row if the
nuclear@1 60 * application provides just a one-row buffer; we also use the spare
nuclear@1 61 * to discard the dummy last row if the image height is odd.
nuclear@1 62 */
nuclear@1 63 JSAMPROW spare_row;
nuclear@1 64 boolean spare_full; /* T if spare buffer is occupied */
nuclear@1 65
nuclear@1 66 JDIMENSION out_row_width; /* samples per output row */
nuclear@1 67 JDIMENSION rows_to_go; /* counts rows remaining in image */
nuclear@1 68 } my_upsampler;
nuclear@1 69
nuclear@1 70 typedef my_upsampler * my_upsample_ptr;
nuclear@1 71
nuclear@1 72 #define SCALEBITS 16 /* speediest right-shift on some machines */
nuclear@1 73 #define ONE_HALF ((INT32) 1 << (SCALEBITS-1))
nuclear@1 74 #define FIX(x) ((INT32) ((x) * (1L<<SCALEBITS) + 0.5))
nuclear@1 75
nuclear@1 76
nuclear@1 77 /*
nuclear@1 78 * Initialize tables for YCC->RGB colorspace conversion.
nuclear@1 79 * This is taken directly from jdcolor.c; see that file for more info.
nuclear@1 80 */
nuclear@1 81
nuclear@1 82 LOCAL(void)
nuclear@1 83 build_ycc_rgb_table (j_decompress_ptr cinfo)
nuclear@1 84 {
nuclear@1 85 my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample;
nuclear@1 86 int i;
nuclear@1 87 INT32 x;
nuclear@1 88 SHIFT_TEMPS
nuclear@1 89
nuclear@1 90 upsample->Cr_r_tab = (int *)
nuclear@1 91 (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
nuclear@1 92 (MAXJSAMPLE+1) * SIZEOF(int));
nuclear@1 93 upsample->Cb_b_tab = (int *)
nuclear@1 94 (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
nuclear@1 95 (MAXJSAMPLE+1) * SIZEOF(int));
nuclear@1 96 upsample->Cr_g_tab = (INT32 *)
nuclear@1 97 (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
nuclear@1 98 (MAXJSAMPLE+1) * SIZEOF(INT32));
nuclear@1 99 upsample->Cb_g_tab = (INT32 *)
nuclear@1 100 (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
nuclear@1 101 (MAXJSAMPLE+1) * SIZEOF(INT32));
nuclear@1 102
nuclear@1 103 for (i = 0, x = -CENTERJSAMPLE; i <= MAXJSAMPLE; i++, x++) {
nuclear@1 104 /* i is the actual input pixel value, in the range 0..MAXJSAMPLE */
nuclear@1 105 /* The Cb or Cr value we are thinking of is x = i - CENTERJSAMPLE */
nuclear@1 106 /* Cr=>R value is nearest int to 1.40200 * x */
nuclear@1 107 upsample->Cr_r_tab[i] = (int)
nuclear@1 108 RIGHT_SHIFT(FIX(1.40200) * x + ONE_HALF, SCALEBITS);
nuclear@1 109 /* Cb=>B value is nearest int to 1.77200 * x */
nuclear@1 110 upsample->Cb_b_tab[i] = (int)
nuclear@1 111 RIGHT_SHIFT(FIX(1.77200) * x + ONE_HALF, SCALEBITS);
nuclear@1 112 /* Cr=>G value is scaled-up -0.71414 * x */
nuclear@1 113 upsample->Cr_g_tab[i] = (- FIX(0.71414)) * x;
nuclear@1 114 /* Cb=>G value is scaled-up -0.34414 * x */
nuclear@1 115 /* We also add in ONE_HALF so that need not do it in inner loop */
nuclear@1 116 upsample->Cb_g_tab[i] = (- FIX(0.34414)) * x + ONE_HALF;
nuclear@1 117 }
nuclear@1 118 }
nuclear@1 119
nuclear@1 120
nuclear@1 121 /*
nuclear@1 122 * Initialize for an upsampling pass.
nuclear@1 123 */
nuclear@1 124
nuclear@1 125 METHODDEF(void)
nuclear@1 126 start_pass_merged_upsample (j_decompress_ptr cinfo)
nuclear@1 127 {
nuclear@1 128 my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample;
nuclear@1 129
nuclear@1 130 /* Mark the spare buffer empty */
nuclear@1 131 upsample->spare_full = FALSE;
nuclear@1 132 /* Initialize total-height counter for detecting bottom of image */
nuclear@1 133 upsample->rows_to_go = cinfo->output_height;
nuclear@1 134 }
nuclear@1 135
nuclear@1 136
nuclear@1 137 /*
nuclear@1 138 * Control routine to do upsampling (and color conversion).
nuclear@1 139 *
nuclear@1 140 * The control routine just handles the row buffering considerations.
nuclear@1 141 */
nuclear@1 142
nuclear@1 143 METHODDEF(void)
nuclear@1 144 merged_2v_upsample (j_decompress_ptr cinfo,
nuclear@1 145 JSAMPIMAGE input_buf, JDIMENSION *in_row_group_ctr,
nuclear@1 146 JDIMENSION in_row_groups_avail,
nuclear@1 147 JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
nuclear@1 148 JDIMENSION out_rows_avail)
nuclear@1 149 /* 2:1 vertical sampling case: may need a spare row. */
nuclear@1 150 {
nuclear@1 151 my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample;
nuclear@1 152 JSAMPROW work_ptrs[2];
nuclear@1 153 JDIMENSION num_rows; /* number of rows returned to caller */
nuclear@1 154
nuclear@1 155 if (upsample->spare_full) {
nuclear@1 156 /* If we have a spare row saved from a previous cycle, just return it. */
nuclear@1 157 jcopy_sample_rows(& upsample->spare_row, 0, output_buf + *out_row_ctr, 0,
nuclear@1 158 1, upsample->out_row_width);
nuclear@1 159 num_rows = 1;
nuclear@1 160 upsample->spare_full = FALSE;
nuclear@1 161 } else {
nuclear@1 162 /* Figure number of rows to return to caller. */
nuclear@1 163 num_rows = 2;
nuclear@1 164 /* Not more than the distance to the end of the image. */
nuclear@1 165 if (num_rows > upsample->rows_to_go)
nuclear@1 166 num_rows = upsample->rows_to_go;
nuclear@1 167 /* And not more than what the client can accept: */
nuclear@1 168 out_rows_avail -= *out_row_ctr;
nuclear@1 169 if (num_rows > out_rows_avail)
nuclear@1 170 num_rows = out_rows_avail;
nuclear@1 171 /* Create output pointer array for upsampler. */
nuclear@1 172 work_ptrs[0] = output_buf[*out_row_ctr];
nuclear@1 173 if (num_rows > 1) {
nuclear@1 174 work_ptrs[1] = output_buf[*out_row_ctr + 1];
nuclear@1 175 } else {
nuclear@1 176 work_ptrs[1] = upsample->spare_row;
nuclear@1 177 upsample->spare_full = TRUE;
nuclear@1 178 }
nuclear@1 179 /* Now do the upsampling. */
nuclear@1 180 (*upsample->upmethod) (cinfo, input_buf, *in_row_group_ctr, work_ptrs);
nuclear@1 181 }
nuclear@1 182
nuclear@1 183 /* Adjust counts */
nuclear@1 184 *out_row_ctr += num_rows;
nuclear@1 185 upsample->rows_to_go -= num_rows;
nuclear@1 186 /* When the buffer is emptied, declare this input row group consumed */
nuclear@1 187 if (! upsample->spare_full)
nuclear@1 188 (*in_row_group_ctr)++;
nuclear@1 189 }
nuclear@1 190
nuclear@1 191
nuclear@1 192 METHODDEF(void)
nuclear@1 193 merged_1v_upsample (j_decompress_ptr cinfo,
nuclear@1 194 JSAMPIMAGE input_buf, JDIMENSION *in_row_group_ctr,
nuclear@1 195 JDIMENSION in_row_groups_avail,
nuclear@1 196 JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
nuclear@1 197 JDIMENSION out_rows_avail)
nuclear@1 198 /* 1:1 vertical sampling case: much easier, never need a spare row. */
nuclear@1 199 {
nuclear@1 200 my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample;
nuclear@1 201
nuclear@1 202 /* Just do the upsampling. */
nuclear@1 203 (*upsample->upmethod) (cinfo, input_buf, *in_row_group_ctr,
nuclear@1 204 output_buf + *out_row_ctr);
nuclear@1 205 /* Adjust counts */
nuclear@1 206 (*out_row_ctr)++;
nuclear@1 207 (*in_row_group_ctr)++;
nuclear@1 208 }
nuclear@1 209
nuclear@1 210
nuclear@1 211 /*
nuclear@1 212 * These are the routines invoked by the control routines to do
nuclear@1 213 * the actual upsampling/conversion. One row group is processed per call.
nuclear@1 214 *
nuclear@1 215 * Note: since we may be writing directly into application-supplied buffers,
nuclear@1 216 * we have to be honest about the output width; we can't assume the buffer
nuclear@1 217 * has been rounded up to an even width.
nuclear@1 218 */
nuclear@1 219
nuclear@1 220
nuclear@1 221 /*
nuclear@1 222 * Upsample and color convert for the case of 2:1 horizontal and 1:1 vertical.
nuclear@1 223 */
nuclear@1 224
nuclear@1 225 METHODDEF(void)
nuclear@1 226 h2v1_merged_upsample (j_decompress_ptr cinfo,
nuclear@1 227 JSAMPIMAGE input_buf, JDIMENSION in_row_group_ctr,
nuclear@1 228 JSAMPARRAY output_buf)
nuclear@1 229 {
nuclear@1 230 my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample;
nuclear@1 231 register int y, cred, cgreen, cblue;
nuclear@1 232 int cb, cr;
nuclear@1 233 register JSAMPROW outptr;
nuclear@1 234 JSAMPROW inptr0, inptr1, inptr2;
nuclear@1 235 JDIMENSION col;
nuclear@1 236 /* copy these pointers into registers if possible */
nuclear@1 237 register JSAMPLE * range_limit = cinfo->sample_range_limit;
nuclear@1 238 int * Crrtab = upsample->Cr_r_tab;
nuclear@1 239 int * Cbbtab = upsample->Cb_b_tab;
nuclear@1 240 INT32 * Crgtab = upsample->Cr_g_tab;
nuclear@1 241 INT32 * Cbgtab = upsample->Cb_g_tab;
nuclear@1 242 SHIFT_TEMPS
nuclear@1 243
nuclear@1 244 inptr0 = input_buf[0][in_row_group_ctr];
nuclear@1 245 inptr1 = input_buf[1][in_row_group_ctr];
nuclear@1 246 inptr2 = input_buf[2][in_row_group_ctr];
nuclear@1 247 outptr = output_buf[0];
nuclear@1 248 /* Loop for each pair of output pixels */
nuclear@1 249 for (col = cinfo->output_width >> 1; col > 0; col--) {
nuclear@1 250 /* Do the chroma part of the calculation */
nuclear@1 251 cb = GETJSAMPLE(*inptr1++);
nuclear@1 252 cr = GETJSAMPLE(*inptr2++);
nuclear@1 253 cred = Crrtab[cr];
nuclear@1 254 cgreen = (int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], SCALEBITS);
nuclear@1 255 cblue = Cbbtab[cb];
nuclear@1 256 /* Fetch 2 Y values and emit 2 pixels */
nuclear@1 257 y = GETJSAMPLE(*inptr0++);
nuclear@1 258 outptr[RGB_RED] = range_limit[y + cred];
nuclear@1 259 outptr[RGB_GREEN] = range_limit[y + cgreen];
nuclear@1 260 outptr[RGB_BLUE] = range_limit[y + cblue];
nuclear@1 261 outptr += RGB_PIXELSIZE;
nuclear@1 262 y = GETJSAMPLE(*inptr0++);
nuclear@1 263 outptr[RGB_RED] = range_limit[y + cred];
nuclear@1 264 outptr[RGB_GREEN] = range_limit[y + cgreen];
nuclear@1 265 outptr[RGB_BLUE] = range_limit[y + cblue];
nuclear@1 266 outptr += RGB_PIXELSIZE;
nuclear@1 267 }
nuclear@1 268 /* If image width is odd, do the last output column separately */
nuclear@1 269 if (cinfo->output_width & 1) {
nuclear@1 270 cb = GETJSAMPLE(*inptr1);
nuclear@1 271 cr = GETJSAMPLE(*inptr2);
nuclear@1 272 cred = Crrtab[cr];
nuclear@1 273 cgreen = (int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], SCALEBITS);
nuclear@1 274 cblue = Cbbtab[cb];
nuclear@1 275 y = GETJSAMPLE(*inptr0);
nuclear@1 276 outptr[RGB_RED] = range_limit[y + cred];
nuclear@1 277 outptr[RGB_GREEN] = range_limit[y + cgreen];
nuclear@1 278 outptr[RGB_BLUE] = range_limit[y + cblue];
nuclear@1 279 }
nuclear@1 280 }
nuclear@1 281
nuclear@1 282
nuclear@1 283 /*
nuclear@1 284 * Upsample and color convert for the case of 2:1 horizontal and 2:1 vertical.
nuclear@1 285 */
nuclear@1 286
nuclear@1 287 METHODDEF(void)
nuclear@1 288 h2v2_merged_upsample (j_decompress_ptr cinfo,
nuclear@1 289 JSAMPIMAGE input_buf, JDIMENSION in_row_group_ctr,
nuclear@1 290 JSAMPARRAY output_buf)
nuclear@1 291 {
nuclear@1 292 my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample;
nuclear@1 293 register int y, cred, cgreen, cblue;
nuclear@1 294 int cb, cr;
nuclear@1 295 register JSAMPROW outptr0, outptr1;
nuclear@1 296 JSAMPROW inptr00, inptr01, inptr1, inptr2;
nuclear@1 297 JDIMENSION col;
nuclear@1 298 /* copy these pointers into registers if possible */
nuclear@1 299 register JSAMPLE * range_limit = cinfo->sample_range_limit;
nuclear@1 300 int * Crrtab = upsample->Cr_r_tab;
nuclear@1 301 int * Cbbtab = upsample->Cb_b_tab;
nuclear@1 302 INT32 * Crgtab = upsample->Cr_g_tab;
nuclear@1 303 INT32 * Cbgtab = upsample->Cb_g_tab;
nuclear@1 304 SHIFT_TEMPS
nuclear@1 305
nuclear@1 306 inptr00 = input_buf[0][in_row_group_ctr*2];
nuclear@1 307 inptr01 = input_buf[0][in_row_group_ctr*2 + 1];
nuclear@1 308 inptr1 = input_buf[1][in_row_group_ctr];
nuclear@1 309 inptr2 = input_buf[2][in_row_group_ctr];
nuclear@1 310 outptr0 = output_buf[0];
nuclear@1 311 outptr1 = output_buf[1];
nuclear@1 312 /* Loop for each group of output pixels */
nuclear@1 313 for (col = cinfo->output_width >> 1; col > 0; col--) {
nuclear@1 314 /* Do the chroma part of the calculation */
nuclear@1 315 cb = GETJSAMPLE(*inptr1++);
nuclear@1 316 cr = GETJSAMPLE(*inptr2++);
nuclear@1 317 cred = Crrtab[cr];
nuclear@1 318 cgreen = (int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], SCALEBITS);
nuclear@1 319 cblue = Cbbtab[cb];
nuclear@1 320 /* Fetch 4 Y values and emit 4 pixels */
nuclear@1 321 y = GETJSAMPLE(*inptr00++);
nuclear@1 322 outptr0[RGB_RED] = range_limit[y + cred];
nuclear@1 323 outptr0[RGB_GREEN] = range_limit[y + cgreen];
nuclear@1 324 outptr0[RGB_BLUE] = range_limit[y + cblue];
nuclear@1 325 outptr0 += RGB_PIXELSIZE;
nuclear@1 326 y = GETJSAMPLE(*inptr00++);
nuclear@1 327 outptr0[RGB_RED] = range_limit[y + cred];
nuclear@1 328 outptr0[RGB_GREEN] = range_limit[y + cgreen];
nuclear@1 329 outptr0[RGB_BLUE] = range_limit[y + cblue];
nuclear@1 330 outptr0 += RGB_PIXELSIZE;
nuclear@1 331 y = GETJSAMPLE(*inptr01++);
nuclear@1 332 outptr1[RGB_RED] = range_limit[y + cred];
nuclear@1 333 outptr1[RGB_GREEN] = range_limit[y + cgreen];
nuclear@1 334 outptr1[RGB_BLUE] = range_limit[y + cblue];
nuclear@1 335 outptr1 += RGB_PIXELSIZE;
nuclear@1 336 y = GETJSAMPLE(*inptr01++);
nuclear@1 337 outptr1[RGB_RED] = range_limit[y + cred];
nuclear@1 338 outptr1[RGB_GREEN] = range_limit[y + cgreen];
nuclear@1 339 outptr1[RGB_BLUE] = range_limit[y + cblue];
nuclear@1 340 outptr1 += RGB_PIXELSIZE;
nuclear@1 341 }
nuclear@1 342 /* If image width is odd, do the last output column separately */
nuclear@1 343 if (cinfo->output_width & 1) {
nuclear@1 344 cb = GETJSAMPLE(*inptr1);
nuclear@1 345 cr = GETJSAMPLE(*inptr2);
nuclear@1 346 cred = Crrtab[cr];
nuclear@1 347 cgreen = (int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], SCALEBITS);
nuclear@1 348 cblue = Cbbtab[cb];
nuclear@1 349 y = GETJSAMPLE(*inptr00);
nuclear@1 350 outptr0[RGB_RED] = range_limit[y + cred];
nuclear@1 351 outptr0[RGB_GREEN] = range_limit[y + cgreen];
nuclear@1 352 outptr0[RGB_BLUE] = range_limit[y + cblue];
nuclear@1 353 y = GETJSAMPLE(*inptr01);
nuclear@1 354 outptr1[RGB_RED] = range_limit[y + cred];
nuclear@1 355 outptr1[RGB_GREEN] = range_limit[y + cgreen];
nuclear@1 356 outptr1[RGB_BLUE] = range_limit[y + cblue];
nuclear@1 357 }
nuclear@1 358 }
nuclear@1 359
nuclear@1 360
nuclear@1 361 /*
nuclear@1 362 * Module initialization routine for merged upsampling/color conversion.
nuclear@1 363 *
nuclear@1 364 * NB: this is called under the conditions determined by use_merged_upsample()
nuclear@1 365 * in jdmaster.c. That routine MUST correspond to the actual capabilities
nuclear@1 366 * of this module; no safety checks are made here.
nuclear@1 367 */
nuclear@1 368
nuclear@1 369 GLOBAL(void)
nuclear@1 370 jinit_merged_upsampler (j_decompress_ptr cinfo)
nuclear@1 371 {
nuclear@1 372 my_upsample_ptr upsample;
nuclear@1 373
nuclear@1 374 upsample = (my_upsample_ptr)
nuclear@1 375 (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
nuclear@1 376 SIZEOF(my_upsampler));
nuclear@1 377 cinfo->upsample = (struct jpeg_upsampler *) upsample;
nuclear@1 378 upsample->pub.start_pass = start_pass_merged_upsample;
nuclear@1 379 upsample->pub.need_context_rows = FALSE;
nuclear@1 380
nuclear@1 381 upsample->out_row_width = cinfo->output_width * cinfo->out_color_components;
nuclear@1 382
nuclear@1 383 if (cinfo->max_v_samp_factor == 2) {
nuclear@1 384 upsample->pub.upsample = merged_2v_upsample;
nuclear@1 385 upsample->upmethod = h2v2_merged_upsample;
nuclear@1 386 /* Allocate a spare row buffer */
nuclear@1 387 upsample->spare_row = (JSAMPROW)
nuclear@1 388 (*cinfo->mem->alloc_large) ((j_common_ptr) cinfo, JPOOL_IMAGE,
nuclear@1 389 (size_t) (upsample->out_row_width * SIZEOF(JSAMPLE)));
nuclear@1 390 } else {
nuclear@1 391 upsample->pub.upsample = merged_1v_upsample;
nuclear@1 392 upsample->upmethod = h2v1_merged_upsample;
nuclear@1 393 /* No spare row needed */
nuclear@1 394 upsample->spare_row = NULL;
nuclear@1 395 }
nuclear@1 396
nuclear@1 397 build_ycc_rgb_table(cinfo);
nuclear@1 398 }
nuclear@1 399
nuclear@1 400 #endif /* UPSAMPLE_MERGING_SUPPORTED */