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annotate libs/libjpeg/jdmerge.c @ 32:622f61160016

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ok this fixes it but why?
author John Tsiombikas <nuclear@member.fsf.org>
date Fri, 09 Oct 2015 05:17:11 +0300
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nuclear@2 1 /*
nuclear@2 2 * jdmerge.c
nuclear@2 3 *
nuclear@2 4 * Copyright (C) 1994-1996, Thomas G. Lane.
nuclear@2 5 * This file is part of the Independent JPEG Group's software.
nuclear@2 6 * For conditions of distribution and use, see the accompanying README file.
nuclear@2 7 *
nuclear@2 8 * This file contains code for merged upsampling/color conversion.
nuclear@2 9 *
nuclear@2 10 * This file combines functions from jdsample.c and jdcolor.c;
nuclear@2 11 * read those files first to understand what's going on.
nuclear@2 12 *
nuclear@2 13 * When the chroma components are to be upsampled by simple replication
nuclear@2 14 * (ie, box filtering), we can save some work in color conversion by
nuclear@2 15 * calculating all the output pixels corresponding to a pair of chroma
nuclear@2 16 * samples at one time. In the conversion equations
nuclear@2 17 * R = Y + K1 * Cr
nuclear@2 18 * G = Y + K2 * Cb + K3 * Cr
nuclear@2 19 * B = Y + K4 * Cb
nuclear@2 20 * only the Y term varies among the group of pixels corresponding to a pair
nuclear@2 21 * of chroma samples, so the rest of the terms can be calculated just once.
nuclear@2 22 * At typical sampling ratios, this eliminates half or three-quarters of the
nuclear@2 23 * multiplications needed for color conversion.
nuclear@2 24 *
nuclear@2 25 * This file currently provides implementations for the following cases:
nuclear@2 26 * YCbCr => RGB color conversion only.
nuclear@2 27 * Sampling ratios of 2h1v or 2h2v.
nuclear@2 28 * No scaling needed at upsample time.
nuclear@2 29 * Corner-aligned (non-CCIR601) sampling alignment.
nuclear@2 30 * Other special cases could be added, but in most applications these are
nuclear@2 31 * the only common cases. (For uncommon cases we fall back on the more
nuclear@2 32 * general code in jdsample.c and jdcolor.c.)
nuclear@2 33 */
nuclear@2 34
nuclear@2 35 #define JPEG_INTERNALS
nuclear@2 36 #include "jinclude.h"
nuclear@2 37 #include "jpeglib.h"
nuclear@2 38
nuclear@2 39 #ifdef UPSAMPLE_MERGING_SUPPORTED
nuclear@2 40
nuclear@2 41
nuclear@2 42 /* Private subobject */
nuclear@2 43
nuclear@2 44 typedef struct {
nuclear@2 45 struct jpeg_upsampler pub; /* public fields */
nuclear@2 46
nuclear@2 47 /* Pointer to routine to do actual upsampling/conversion of one row group */
nuclear@2 48 JMETHOD(void, upmethod, (j_decompress_ptr cinfo,
nuclear@2 49 JSAMPIMAGE input_buf, JDIMENSION in_row_group_ctr,
nuclear@2 50 JSAMPARRAY output_buf));
nuclear@2 51
nuclear@2 52 /* Private state for YCC->RGB conversion */
nuclear@2 53 int * Cr_r_tab; /* => table for Cr to R conversion */
nuclear@2 54 int * Cb_b_tab; /* => table for Cb to B conversion */
nuclear@2 55 INT32 * Cr_g_tab; /* => table for Cr to G conversion */
nuclear@2 56 INT32 * Cb_g_tab; /* => table for Cb to G conversion */
nuclear@2 57
nuclear@2 58 /* For 2:1 vertical sampling, we produce two output rows at a time.
nuclear@2 59 * We need a "spare" row buffer to hold the second output row if the
nuclear@2 60 * application provides just a one-row buffer; we also use the spare
nuclear@2 61 * to discard the dummy last row if the image height is odd.
nuclear@2 62 */
nuclear@2 63 JSAMPROW spare_row;
nuclear@2 64 boolean spare_full; /* T if spare buffer is occupied */
nuclear@2 65
nuclear@2 66 JDIMENSION out_row_width; /* samples per output row */
nuclear@2 67 JDIMENSION rows_to_go; /* counts rows remaining in image */
nuclear@2 68 } my_upsampler;
nuclear@2 69
nuclear@2 70 typedef my_upsampler * my_upsample_ptr;
nuclear@2 71
nuclear@2 72 #define SCALEBITS 16 /* speediest right-shift on some machines */
nuclear@2 73 #define ONE_HALF ((INT32) 1 << (SCALEBITS-1))
nuclear@2 74 #define FIX(x) ((INT32) ((x) * (1L<<SCALEBITS) + 0.5))
nuclear@2 75
nuclear@2 76
nuclear@2 77 /*
nuclear@2 78 * Initialize tables for YCC->RGB colorspace conversion.
nuclear@2 79 * This is taken directly from jdcolor.c; see that file for more info.
nuclear@2 80 */
nuclear@2 81
nuclear@2 82 LOCAL(void)
nuclear@2 83 build_ycc_rgb_table (j_decompress_ptr cinfo)
nuclear@2 84 {
nuclear@2 85 my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample;
nuclear@2 86 int i;
nuclear@2 87 INT32 x;
nuclear@2 88 SHIFT_TEMPS
nuclear@2 89
nuclear@2 90 upsample->Cr_r_tab = (int *)
nuclear@2 91 (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
nuclear@2 92 (MAXJSAMPLE+1) * SIZEOF(int));
nuclear@2 93 upsample->Cb_b_tab = (int *)
nuclear@2 94 (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
nuclear@2 95 (MAXJSAMPLE+1) * SIZEOF(int));
nuclear@2 96 upsample->Cr_g_tab = (INT32 *)
nuclear@2 97 (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
nuclear@2 98 (MAXJSAMPLE+1) * SIZEOF(INT32));
nuclear@2 99 upsample->Cb_g_tab = (INT32 *)
nuclear@2 100 (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
nuclear@2 101 (MAXJSAMPLE+1) * SIZEOF(INT32));
nuclear@2 102
nuclear@2 103 for (i = 0, x = -CENTERJSAMPLE; i <= MAXJSAMPLE; i++, x++) {
nuclear@2 104 /* i is the actual input pixel value, in the range 0..MAXJSAMPLE */
nuclear@2 105 /* The Cb or Cr value we are thinking of is x = i - CENTERJSAMPLE */
nuclear@2 106 /* Cr=>R value is nearest int to 1.40200 * x */
nuclear@2 107 upsample->Cr_r_tab[i] = (int)
nuclear@2 108 RIGHT_SHIFT(FIX(1.40200) * x + ONE_HALF, SCALEBITS);
nuclear@2 109 /* Cb=>B value is nearest int to 1.77200 * x */
nuclear@2 110 upsample->Cb_b_tab[i] = (int)
nuclear@2 111 RIGHT_SHIFT(FIX(1.77200) * x + ONE_HALF, SCALEBITS);
nuclear@2 112 /* Cr=>G value is scaled-up -0.71414 * x */
nuclear@2 113 upsample->Cr_g_tab[i] = (- FIX(0.71414)) * x;
nuclear@2 114 /* Cb=>G value is scaled-up -0.34414 * x */
nuclear@2 115 /* We also add in ONE_HALF so that need not do it in inner loop */
nuclear@2 116 upsample->Cb_g_tab[i] = (- FIX(0.34414)) * x + ONE_HALF;
nuclear@2 117 }
nuclear@2 118 }
nuclear@2 119
nuclear@2 120
nuclear@2 121 /*
nuclear@2 122 * Initialize for an upsampling pass.
nuclear@2 123 */
nuclear@2 124
nuclear@2 125 METHODDEF(void)
nuclear@2 126 start_pass_merged_upsample (j_decompress_ptr cinfo)
nuclear@2 127 {
nuclear@2 128 my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample;
nuclear@2 129
nuclear@2 130 /* Mark the spare buffer empty */
nuclear@2 131 upsample->spare_full = FALSE;
nuclear@2 132 /* Initialize total-height counter for detecting bottom of image */
nuclear@2 133 upsample->rows_to_go = cinfo->output_height;
nuclear@2 134 }
nuclear@2 135
nuclear@2 136
nuclear@2 137 /*
nuclear@2 138 * Control routine to do upsampling (and color conversion).
nuclear@2 139 *
nuclear@2 140 * The control routine just handles the row buffering considerations.
nuclear@2 141 */
nuclear@2 142
nuclear@2 143 METHODDEF(void)
nuclear@2 144 merged_2v_upsample (j_decompress_ptr cinfo,
nuclear@2 145 JSAMPIMAGE input_buf, JDIMENSION *in_row_group_ctr,
nuclear@2 146 JDIMENSION in_row_groups_avail,
nuclear@2 147 JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
nuclear@2 148 JDIMENSION out_rows_avail)
nuclear@2 149 /* 2:1 vertical sampling case: may need a spare row. */
nuclear@2 150 {
nuclear@2 151 my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample;
nuclear@2 152 JSAMPROW work_ptrs[2];
nuclear@2 153 JDIMENSION num_rows; /* number of rows returned to caller */
nuclear@2 154
nuclear@2 155 if (upsample->spare_full) {
nuclear@2 156 /* If we have a spare row saved from a previous cycle, just return it. */
nuclear@2 157 jcopy_sample_rows(& upsample->spare_row, 0, output_buf + *out_row_ctr, 0,
nuclear@2 158 1, upsample->out_row_width);
nuclear@2 159 num_rows = 1;
nuclear@2 160 upsample->spare_full = FALSE;
nuclear@2 161 } else {
nuclear@2 162 /* Figure number of rows to return to caller. */
nuclear@2 163 num_rows = 2;
nuclear@2 164 /* Not more than the distance to the end of the image. */
nuclear@2 165 if (num_rows > upsample->rows_to_go)
nuclear@2 166 num_rows = upsample->rows_to_go;
nuclear@2 167 /* And not more than what the client can accept: */
nuclear@2 168 out_rows_avail -= *out_row_ctr;
nuclear@2 169 if (num_rows > out_rows_avail)
nuclear@2 170 num_rows = out_rows_avail;
nuclear@2 171 /* Create output pointer array for upsampler. */
nuclear@2 172 work_ptrs[0] = output_buf[*out_row_ctr];
nuclear@2 173 if (num_rows > 1) {
nuclear@2 174 work_ptrs[1] = output_buf[*out_row_ctr + 1];
nuclear@2 175 } else {
nuclear@2 176 work_ptrs[1] = upsample->spare_row;
nuclear@2 177 upsample->spare_full = TRUE;
nuclear@2 178 }
nuclear@2 179 /* Now do the upsampling. */
nuclear@2 180 (*upsample->upmethod) (cinfo, input_buf, *in_row_group_ctr, work_ptrs);
nuclear@2 181 }
nuclear@2 182
nuclear@2 183 /* Adjust counts */
nuclear@2 184 *out_row_ctr += num_rows;
nuclear@2 185 upsample->rows_to_go -= num_rows;
nuclear@2 186 /* When the buffer is emptied, declare this input row group consumed */
nuclear@2 187 if (! upsample->spare_full)
nuclear@2 188 (*in_row_group_ctr)++;
nuclear@2 189 }
nuclear@2 190
nuclear@2 191
nuclear@2 192 METHODDEF(void)
nuclear@2 193 merged_1v_upsample (j_decompress_ptr cinfo,
nuclear@2 194 JSAMPIMAGE input_buf, JDIMENSION *in_row_group_ctr,
nuclear@2 195 JDIMENSION in_row_groups_avail,
nuclear@2 196 JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
nuclear@2 197 JDIMENSION out_rows_avail)
nuclear@2 198 /* 1:1 vertical sampling case: much easier, never need a spare row. */
nuclear@2 199 {
nuclear@2 200 my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample;
nuclear@2 201
nuclear@2 202 /* Just do the upsampling. */
nuclear@2 203 (*upsample->upmethod) (cinfo, input_buf, *in_row_group_ctr,
nuclear@2 204 output_buf + *out_row_ctr);
nuclear@2 205 /* Adjust counts */
nuclear@2 206 (*out_row_ctr)++;
nuclear@2 207 (*in_row_group_ctr)++;
nuclear@2 208 }
nuclear@2 209
nuclear@2 210
nuclear@2 211 /*
nuclear@2 212 * These are the routines invoked by the control routines to do
nuclear@2 213 * the actual upsampling/conversion. One row group is processed per call.
nuclear@2 214 *
nuclear@2 215 * Note: since we may be writing directly into application-supplied buffers,
nuclear@2 216 * we have to be honest about the output width; we can't assume the buffer
nuclear@2 217 * has been rounded up to an even width.
nuclear@2 218 */
nuclear@2 219
nuclear@2 220
nuclear@2 221 /*
nuclear@2 222 * Upsample and color convert for the case of 2:1 horizontal and 1:1 vertical.
nuclear@2 223 */
nuclear@2 224
nuclear@2 225 METHODDEF(void)
nuclear@2 226 h2v1_merged_upsample (j_decompress_ptr cinfo,
nuclear@2 227 JSAMPIMAGE input_buf, JDIMENSION in_row_group_ctr,
nuclear@2 228 JSAMPARRAY output_buf)
nuclear@2 229 {
nuclear@2 230 my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample;
nuclear@2 231 register int y, cred, cgreen, cblue;
nuclear@2 232 int cb, cr;
nuclear@2 233 register JSAMPROW outptr;
nuclear@2 234 JSAMPROW inptr0, inptr1, inptr2;
nuclear@2 235 JDIMENSION col;
nuclear@2 236 /* copy these pointers into registers if possible */
nuclear@2 237 register JSAMPLE * range_limit = cinfo->sample_range_limit;
nuclear@2 238 int * Crrtab = upsample->Cr_r_tab;
nuclear@2 239 int * Cbbtab = upsample->Cb_b_tab;
nuclear@2 240 INT32 * Crgtab = upsample->Cr_g_tab;
nuclear@2 241 INT32 * Cbgtab = upsample->Cb_g_tab;
nuclear@2 242 SHIFT_TEMPS
nuclear@2 243
nuclear@2 244 inptr0 = input_buf[0][in_row_group_ctr];
nuclear@2 245 inptr1 = input_buf[1][in_row_group_ctr];
nuclear@2 246 inptr2 = input_buf[2][in_row_group_ctr];
nuclear@2 247 outptr = output_buf[0];
nuclear@2 248 /* Loop for each pair of output pixels */
nuclear@2 249 for (col = cinfo->output_width >> 1; col > 0; col--) {
nuclear@2 250 /* Do the chroma part of the calculation */
nuclear@2 251 cb = GETJSAMPLE(*inptr1++);
nuclear@2 252 cr = GETJSAMPLE(*inptr2++);
nuclear@2 253 cred = Crrtab[cr];
nuclear@2 254 cgreen = (int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], SCALEBITS);
nuclear@2 255 cblue = Cbbtab[cb];
nuclear@2 256 /* Fetch 2 Y values and emit 2 pixels */
nuclear@2 257 y = GETJSAMPLE(*inptr0++);
nuclear@2 258 outptr[RGB_RED] = range_limit[y + cred];
nuclear@2 259 outptr[RGB_GREEN] = range_limit[y + cgreen];
nuclear@2 260 outptr[RGB_BLUE] = range_limit[y + cblue];
nuclear@2 261 outptr += RGB_PIXELSIZE;
nuclear@2 262 y = GETJSAMPLE(*inptr0++);
nuclear@2 263 outptr[RGB_RED] = range_limit[y + cred];
nuclear@2 264 outptr[RGB_GREEN] = range_limit[y + cgreen];
nuclear@2 265 outptr[RGB_BLUE] = range_limit[y + cblue];
nuclear@2 266 outptr += RGB_PIXELSIZE;
nuclear@2 267 }
nuclear@2 268 /* If image width is odd, do the last output column separately */
nuclear@2 269 if (cinfo->output_width & 1) {
nuclear@2 270 cb = GETJSAMPLE(*inptr1);
nuclear@2 271 cr = GETJSAMPLE(*inptr2);
nuclear@2 272 cred = Crrtab[cr];
nuclear@2 273 cgreen = (int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], SCALEBITS);
nuclear@2 274 cblue = Cbbtab[cb];
nuclear@2 275 y = GETJSAMPLE(*inptr0);
nuclear@2 276 outptr[RGB_RED] = range_limit[y + cred];
nuclear@2 277 outptr[RGB_GREEN] = range_limit[y + cgreen];
nuclear@2 278 outptr[RGB_BLUE] = range_limit[y + cblue];
nuclear@2 279 }
nuclear@2 280 }
nuclear@2 281
nuclear@2 282
nuclear@2 283 /*
nuclear@2 284 * Upsample and color convert for the case of 2:1 horizontal and 2:1 vertical.
nuclear@2 285 */
nuclear@2 286
nuclear@2 287 METHODDEF(void)
nuclear@2 288 h2v2_merged_upsample (j_decompress_ptr cinfo,
nuclear@2 289 JSAMPIMAGE input_buf, JDIMENSION in_row_group_ctr,
nuclear@2 290 JSAMPARRAY output_buf)
nuclear@2 291 {
nuclear@2 292 my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample;
nuclear@2 293 register int y, cred, cgreen, cblue;
nuclear@2 294 int cb, cr;
nuclear@2 295 register JSAMPROW outptr0, outptr1;
nuclear@2 296 JSAMPROW inptr00, inptr01, inptr1, inptr2;
nuclear@2 297 JDIMENSION col;
nuclear@2 298 /* copy these pointers into registers if possible */
nuclear@2 299 register JSAMPLE * range_limit = cinfo->sample_range_limit;
nuclear@2 300 int * Crrtab = upsample->Cr_r_tab;
nuclear@2 301 int * Cbbtab = upsample->Cb_b_tab;
nuclear@2 302 INT32 * Crgtab = upsample->Cr_g_tab;
nuclear@2 303 INT32 * Cbgtab = upsample->Cb_g_tab;
nuclear@2 304 SHIFT_TEMPS
nuclear@2 305
nuclear@2 306 inptr00 = input_buf[0][in_row_group_ctr*2];
nuclear@2 307 inptr01 = input_buf[0][in_row_group_ctr*2 + 1];
nuclear@2 308 inptr1 = input_buf[1][in_row_group_ctr];
nuclear@2 309 inptr2 = input_buf[2][in_row_group_ctr];
nuclear@2 310 outptr0 = output_buf[0];
nuclear@2 311 outptr1 = output_buf[1];
nuclear@2 312 /* Loop for each group of output pixels */
nuclear@2 313 for (col = cinfo->output_width >> 1; col > 0; col--) {
nuclear@2 314 /* Do the chroma part of the calculation */
nuclear@2 315 cb = GETJSAMPLE(*inptr1++);
nuclear@2 316 cr = GETJSAMPLE(*inptr2++);
nuclear@2 317 cred = Crrtab[cr];
nuclear@2 318 cgreen = (int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], SCALEBITS);
nuclear@2 319 cblue = Cbbtab[cb];
nuclear@2 320 /* Fetch 4 Y values and emit 4 pixels */
nuclear@2 321 y = GETJSAMPLE(*inptr00++);
nuclear@2 322 outptr0[RGB_RED] = range_limit[y + cred];
nuclear@2 323 outptr0[RGB_GREEN] = range_limit[y + cgreen];
nuclear@2 324 outptr0[RGB_BLUE] = range_limit[y + cblue];
nuclear@2 325 outptr0 += RGB_PIXELSIZE;
nuclear@2 326 y = GETJSAMPLE(*inptr00++);
nuclear@2 327 outptr0[RGB_RED] = range_limit[y + cred];
nuclear@2 328 outptr0[RGB_GREEN] = range_limit[y + cgreen];
nuclear@2 329 outptr0[RGB_BLUE] = range_limit[y + cblue];
nuclear@2 330 outptr0 += RGB_PIXELSIZE;
nuclear@2 331 y = GETJSAMPLE(*inptr01++);
nuclear@2 332 outptr1[RGB_RED] = range_limit[y + cred];
nuclear@2 333 outptr1[RGB_GREEN] = range_limit[y + cgreen];
nuclear@2 334 outptr1[RGB_BLUE] = range_limit[y + cblue];
nuclear@2 335 outptr1 += RGB_PIXELSIZE;
nuclear@2 336 y = GETJSAMPLE(*inptr01++);
nuclear@2 337 outptr1[RGB_RED] = range_limit[y + cred];
nuclear@2 338 outptr1[RGB_GREEN] = range_limit[y + cgreen];
nuclear@2 339 outptr1[RGB_BLUE] = range_limit[y + cblue];
nuclear@2 340 outptr1 += RGB_PIXELSIZE;
nuclear@2 341 }
nuclear@2 342 /* If image width is odd, do the last output column separately */
nuclear@2 343 if (cinfo->output_width & 1) {
nuclear@2 344 cb = GETJSAMPLE(*inptr1);
nuclear@2 345 cr = GETJSAMPLE(*inptr2);
nuclear@2 346 cred = Crrtab[cr];
nuclear@2 347 cgreen = (int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], SCALEBITS);
nuclear@2 348 cblue = Cbbtab[cb];
nuclear@2 349 y = GETJSAMPLE(*inptr00);
nuclear@2 350 outptr0[RGB_RED] = range_limit[y + cred];
nuclear@2 351 outptr0[RGB_GREEN] = range_limit[y + cgreen];
nuclear@2 352 outptr0[RGB_BLUE] = range_limit[y + cblue];
nuclear@2 353 y = GETJSAMPLE(*inptr01);
nuclear@2 354 outptr1[RGB_RED] = range_limit[y + cred];
nuclear@2 355 outptr1[RGB_GREEN] = range_limit[y + cgreen];
nuclear@2 356 outptr1[RGB_BLUE] = range_limit[y + cblue];
nuclear@2 357 }
nuclear@2 358 }
nuclear@2 359
nuclear@2 360
nuclear@2 361 /*
nuclear@2 362 * Module initialization routine for merged upsampling/color conversion.
nuclear@2 363 *
nuclear@2 364 * NB: this is called under the conditions determined by use_merged_upsample()
nuclear@2 365 * in jdmaster.c. That routine MUST correspond to the actual capabilities
nuclear@2 366 * of this module; no safety checks are made here.
nuclear@2 367 */
nuclear@2 368
nuclear@2 369 GLOBAL(void)
nuclear@2 370 jinit_merged_upsampler (j_decompress_ptr cinfo)
nuclear@2 371 {
nuclear@2 372 my_upsample_ptr upsample;
nuclear@2 373
nuclear@2 374 upsample = (my_upsample_ptr)
nuclear@2 375 (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
nuclear@2 376 SIZEOF(my_upsampler));
nuclear@2 377 cinfo->upsample = (struct jpeg_upsampler *) upsample;
nuclear@2 378 upsample->pub.start_pass = start_pass_merged_upsample;
nuclear@2 379 upsample->pub.need_context_rows = FALSE;
nuclear@2 380
nuclear@2 381 upsample->out_row_width = cinfo->output_width * cinfo->out_color_components;
nuclear@2 382
nuclear@2 383 if (cinfo->max_v_samp_factor == 2) {
nuclear@2 384 upsample->pub.upsample = merged_2v_upsample;
nuclear@2 385 upsample->upmethod = h2v2_merged_upsample;
nuclear@2 386 /* Allocate a spare row buffer */
nuclear@2 387 upsample->spare_row = (JSAMPROW)
nuclear@2 388 (*cinfo->mem->alloc_large) ((j_common_ptr) cinfo, JPOOL_IMAGE,
nuclear@2 389 (size_t) (upsample->out_row_width * SIZEOF(JSAMPLE)));
nuclear@2 390 } else {
nuclear@2 391 upsample->pub.upsample = merged_1v_upsample;
nuclear@2 392 upsample->upmethod = h2v1_merged_upsample;
nuclear@2 393 /* No spare row needed */
nuclear@2 394 upsample->spare_row = NULL;
nuclear@2 395 }
nuclear@2 396
nuclear@2 397 build_ycc_rgb_table(cinfo);
nuclear@2 398 }
nuclear@2 399
nuclear@2 400 #endif /* UPSAMPLE_MERGING_SUPPORTED */