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annotate libs/libjpeg/jdmerge.c @ 27:3d082c566b53

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fixed all the bugs, pc version works
author John Tsiombikas <nuclear@member.fsf.org>
date Thu, 18 Jun 2015 04:32:25 +0300
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nuclear@14 1 /*
nuclear@14 2 * jdmerge.c
nuclear@14 3 *
nuclear@14 4 * Copyright (C) 1994-1996, Thomas G. Lane.
nuclear@14 5 * This file is part of the Independent JPEG Group's software.
nuclear@14 6 * For conditions of distribution and use, see the accompanying README file.
nuclear@14 7 *
nuclear@14 8 * This file contains code for merged upsampling/color conversion.
nuclear@14 9 *
nuclear@14 10 * This file combines functions from jdsample.c and jdcolor.c;
nuclear@14 11 * read those files first to understand what's going on.
nuclear@14 12 *
nuclear@14 13 * When the chroma components are to be upsampled by simple replication
nuclear@14 14 * (ie, box filtering), we can save some work in color conversion by
nuclear@14 15 * calculating all the output pixels corresponding to a pair of chroma
nuclear@14 16 * samples at one time. In the conversion equations
nuclear@14 17 * R = Y + K1 * Cr
nuclear@14 18 * G = Y + K2 * Cb + K3 * Cr
nuclear@14 19 * B = Y + K4 * Cb
nuclear@14 20 * only the Y term varies among the group of pixels corresponding to a pair
nuclear@14 21 * of chroma samples, so the rest of the terms can be calculated just once.
nuclear@14 22 * At typical sampling ratios, this eliminates half or three-quarters of the
nuclear@14 23 * multiplications needed for color conversion.
nuclear@14 24 *
nuclear@14 25 * This file currently provides implementations for the following cases:
nuclear@14 26 * YCbCr => RGB color conversion only.
nuclear@14 27 * Sampling ratios of 2h1v or 2h2v.
nuclear@14 28 * No scaling needed at upsample time.
nuclear@14 29 * Corner-aligned (non-CCIR601) sampling alignment.
nuclear@14 30 * Other special cases could be added, but in most applications these are
nuclear@14 31 * the only common cases. (For uncommon cases we fall back on the more
nuclear@14 32 * general code in jdsample.c and jdcolor.c.)
nuclear@14 33 */
nuclear@14 34
nuclear@14 35 #define JPEG_INTERNALS
nuclear@14 36 #include "jinclude.h"
nuclear@14 37 #include "jpeglib.h"
nuclear@14 38
nuclear@14 39 #ifdef UPSAMPLE_MERGING_SUPPORTED
nuclear@14 40
nuclear@14 41
nuclear@14 42 /* Private subobject */
nuclear@14 43
nuclear@14 44 typedef struct {
nuclear@14 45 struct jpeg_upsampler pub; /* public fields */
nuclear@14 46
nuclear@14 47 /* Pointer to routine to do actual upsampling/conversion of one row group */
nuclear@14 48 JMETHOD(void, upmethod, (j_decompress_ptr cinfo,
nuclear@14 49 JSAMPIMAGE input_buf, JDIMENSION in_row_group_ctr,
nuclear@14 50 JSAMPARRAY output_buf));
nuclear@14 51
nuclear@14 52 /* Private state for YCC->RGB conversion */
nuclear@14 53 int * Cr_r_tab; /* => table for Cr to R conversion */
nuclear@14 54 int * Cb_b_tab; /* => table for Cb to B conversion */
nuclear@14 55 INT32 * Cr_g_tab; /* => table for Cr to G conversion */
nuclear@14 56 INT32 * Cb_g_tab; /* => table for Cb to G conversion */
nuclear@14 57
nuclear@14 58 /* For 2:1 vertical sampling, we produce two output rows at a time.
nuclear@14 59 * We need a "spare" row buffer to hold the second output row if the
nuclear@14 60 * application provides just a one-row buffer; we also use the spare
nuclear@14 61 * to discard the dummy last row if the image height is odd.
nuclear@14 62 */
nuclear@14 63 JSAMPROW spare_row;
nuclear@14 64 boolean spare_full; /* T if spare buffer is occupied */
nuclear@14 65
nuclear@14 66 JDIMENSION out_row_width; /* samples per output row */
nuclear@14 67 JDIMENSION rows_to_go; /* counts rows remaining in image */
nuclear@14 68 } my_upsampler;
nuclear@14 69
nuclear@14 70 typedef my_upsampler * my_upsample_ptr;
nuclear@14 71
nuclear@14 72 #define SCALEBITS 16 /* speediest right-shift on some machines */
nuclear@14 73 #define ONE_HALF ((INT32) 1 << (SCALEBITS-1))
nuclear@14 74 #define FIX(x) ((INT32) ((x) * (1L<<SCALEBITS) + 0.5))
nuclear@14 75
nuclear@14 76
nuclear@14 77 /*
nuclear@14 78 * Initialize tables for YCC->RGB colorspace conversion.
nuclear@14 79 * This is taken directly from jdcolor.c; see that file for more info.
nuclear@14 80 */
nuclear@14 81
nuclear@14 82 LOCAL(void)
nuclear@14 83 build_ycc_rgb_table (j_decompress_ptr cinfo)
nuclear@14 84 {
nuclear@14 85 my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample;
nuclear@14 86 int i;
nuclear@14 87 INT32 x;
nuclear@14 88 SHIFT_TEMPS
nuclear@14 89
nuclear@14 90 upsample->Cr_r_tab = (int *)
nuclear@14 91 (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
nuclear@14 92 (MAXJSAMPLE+1) * SIZEOF(int));
nuclear@14 93 upsample->Cb_b_tab = (int *)
nuclear@14 94 (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
nuclear@14 95 (MAXJSAMPLE+1) * SIZEOF(int));
nuclear@14 96 upsample->Cr_g_tab = (INT32 *)
nuclear@14 97 (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
nuclear@14 98 (MAXJSAMPLE+1) * SIZEOF(INT32));
nuclear@14 99 upsample->Cb_g_tab = (INT32 *)
nuclear@14 100 (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
nuclear@14 101 (MAXJSAMPLE+1) * SIZEOF(INT32));
nuclear@14 102
nuclear@14 103 for (i = 0, x = -CENTERJSAMPLE; i <= MAXJSAMPLE; i++, x++) {
nuclear@14 104 /* i is the actual input pixel value, in the range 0..MAXJSAMPLE */
nuclear@14 105 /* The Cb or Cr value we are thinking of is x = i - CENTERJSAMPLE */
nuclear@14 106 /* Cr=>R value is nearest int to 1.40200 * x */
nuclear@14 107 upsample->Cr_r_tab[i] = (int)
nuclear@14 108 RIGHT_SHIFT(FIX(1.40200) * x + ONE_HALF, SCALEBITS);
nuclear@14 109 /* Cb=>B value is nearest int to 1.77200 * x */
nuclear@14 110 upsample->Cb_b_tab[i] = (int)
nuclear@14 111 RIGHT_SHIFT(FIX(1.77200) * x + ONE_HALF, SCALEBITS);
nuclear@14 112 /* Cr=>G value is scaled-up -0.71414 * x */
nuclear@14 113 upsample->Cr_g_tab[i] = (- FIX(0.71414)) * x;
nuclear@14 114 /* Cb=>G value is scaled-up -0.34414 * x */
nuclear@14 115 /* We also add in ONE_HALF so that need not do it in inner loop */
nuclear@14 116 upsample->Cb_g_tab[i] = (- FIX(0.34414)) * x + ONE_HALF;
nuclear@14 117 }
nuclear@14 118 }
nuclear@14 119
nuclear@14 120
nuclear@14 121 /*
nuclear@14 122 * Initialize for an upsampling pass.
nuclear@14 123 */
nuclear@14 124
nuclear@14 125 METHODDEF(void)
nuclear@14 126 start_pass_merged_upsample (j_decompress_ptr cinfo)
nuclear@14 127 {
nuclear@14 128 my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample;
nuclear@14 129
nuclear@14 130 /* Mark the spare buffer empty */
nuclear@14 131 upsample->spare_full = FALSE;
nuclear@14 132 /* Initialize total-height counter for detecting bottom of image */
nuclear@14 133 upsample->rows_to_go = cinfo->output_height;
nuclear@14 134 }
nuclear@14 135
nuclear@14 136
nuclear@14 137 /*
nuclear@14 138 * Control routine to do upsampling (and color conversion).
nuclear@14 139 *
nuclear@14 140 * The control routine just handles the row buffering considerations.
nuclear@14 141 */
nuclear@14 142
nuclear@14 143 METHODDEF(void)
nuclear@14 144 merged_2v_upsample (j_decompress_ptr cinfo,
nuclear@14 145 JSAMPIMAGE input_buf, JDIMENSION *in_row_group_ctr,
nuclear@14 146 JDIMENSION in_row_groups_avail,
nuclear@14 147 JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
nuclear@14 148 JDIMENSION out_rows_avail)
nuclear@14 149 /* 2:1 vertical sampling case: may need a spare row. */
nuclear@14 150 {
nuclear@14 151 my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample;
nuclear@14 152 JSAMPROW work_ptrs[2];
nuclear@14 153 JDIMENSION num_rows; /* number of rows returned to caller */
nuclear@14 154
nuclear@14 155 if (upsample->spare_full) {
nuclear@14 156 /* If we have a spare row saved from a previous cycle, just return it. */
nuclear@14 157 jcopy_sample_rows(& upsample->spare_row, 0, output_buf + *out_row_ctr, 0,
nuclear@14 158 1, upsample->out_row_width);
nuclear@14 159 num_rows = 1;
nuclear@14 160 upsample->spare_full = FALSE;
nuclear@14 161 } else {
nuclear@14 162 /* Figure number of rows to return to caller. */
nuclear@14 163 num_rows = 2;
nuclear@14 164 /* Not more than the distance to the end of the image. */
nuclear@14 165 if (num_rows > upsample->rows_to_go)
nuclear@14 166 num_rows = upsample->rows_to_go;
nuclear@14 167 /* And not more than what the client can accept: */
nuclear@14 168 out_rows_avail -= *out_row_ctr;
nuclear@14 169 if (num_rows > out_rows_avail)
nuclear@14 170 num_rows = out_rows_avail;
nuclear@14 171 /* Create output pointer array for upsampler. */
nuclear@14 172 work_ptrs[0] = output_buf[*out_row_ctr];
nuclear@14 173 if (num_rows > 1) {
nuclear@14 174 work_ptrs[1] = output_buf[*out_row_ctr + 1];
nuclear@14 175 } else {
nuclear@14 176 work_ptrs[1] = upsample->spare_row;
nuclear@14 177 upsample->spare_full = TRUE;
nuclear@14 178 }
nuclear@14 179 /* Now do the upsampling. */
nuclear@14 180 (*upsample->upmethod) (cinfo, input_buf, *in_row_group_ctr, work_ptrs);
nuclear@14 181 }
nuclear@14 182
nuclear@14 183 /* Adjust counts */
nuclear@14 184 *out_row_ctr += num_rows;
nuclear@14 185 upsample->rows_to_go -= num_rows;
nuclear@14 186 /* When the buffer is emptied, declare this input row group consumed */
nuclear@14 187 if (! upsample->spare_full)
nuclear@14 188 (*in_row_group_ctr)++;
nuclear@14 189 }
nuclear@14 190
nuclear@14 191
nuclear@14 192 METHODDEF(void)
nuclear@14 193 merged_1v_upsample (j_decompress_ptr cinfo,
nuclear@14 194 JSAMPIMAGE input_buf, JDIMENSION *in_row_group_ctr,
nuclear@14 195 JDIMENSION in_row_groups_avail,
nuclear@14 196 JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
nuclear@14 197 JDIMENSION out_rows_avail)
nuclear@14 198 /* 1:1 vertical sampling case: much easier, never need a spare row. */
nuclear@14 199 {
nuclear@14 200 my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample;
nuclear@14 201
nuclear@14 202 /* Just do the upsampling. */
nuclear@14 203 (*upsample->upmethod) (cinfo, input_buf, *in_row_group_ctr,
nuclear@14 204 output_buf + *out_row_ctr);
nuclear@14 205 /* Adjust counts */
nuclear@14 206 (*out_row_ctr)++;
nuclear@14 207 (*in_row_group_ctr)++;
nuclear@14 208 }
nuclear@14 209
nuclear@14 210
nuclear@14 211 /*
nuclear@14 212 * These are the routines invoked by the control routines to do
nuclear@14 213 * the actual upsampling/conversion. One row group is processed per call.
nuclear@14 214 *
nuclear@14 215 * Note: since we may be writing directly into application-supplied buffers,
nuclear@14 216 * we have to be honest about the output width; we can't assume the buffer
nuclear@14 217 * has been rounded up to an even width.
nuclear@14 218 */
nuclear@14 219
nuclear@14 220
nuclear@14 221 /*
nuclear@14 222 * Upsample and color convert for the case of 2:1 horizontal and 1:1 vertical.
nuclear@14 223 */
nuclear@14 224
nuclear@14 225 METHODDEF(void)
nuclear@14 226 h2v1_merged_upsample (j_decompress_ptr cinfo,
nuclear@14 227 JSAMPIMAGE input_buf, JDIMENSION in_row_group_ctr,
nuclear@14 228 JSAMPARRAY output_buf)
nuclear@14 229 {
nuclear@14 230 my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample;
nuclear@14 231 register int y, cred, cgreen, cblue;
nuclear@14 232 int cb, cr;
nuclear@14 233 register JSAMPROW outptr;
nuclear@14 234 JSAMPROW inptr0, inptr1, inptr2;
nuclear@14 235 JDIMENSION col;
nuclear@14 236 /* copy these pointers into registers if possible */
nuclear@14 237 register JSAMPLE * range_limit = cinfo->sample_range_limit;
nuclear@14 238 int * Crrtab = upsample->Cr_r_tab;
nuclear@14 239 int * Cbbtab = upsample->Cb_b_tab;
nuclear@14 240 INT32 * Crgtab = upsample->Cr_g_tab;
nuclear@14 241 INT32 * Cbgtab = upsample->Cb_g_tab;
nuclear@14 242 SHIFT_TEMPS
nuclear@14 243
nuclear@14 244 inptr0 = input_buf[0][in_row_group_ctr];
nuclear@14 245 inptr1 = input_buf[1][in_row_group_ctr];
nuclear@14 246 inptr2 = input_buf[2][in_row_group_ctr];
nuclear@14 247 outptr = output_buf[0];
nuclear@14 248 /* Loop for each pair of output pixels */
nuclear@14 249 for (col = cinfo->output_width >> 1; col > 0; col--) {
nuclear@14 250 /* Do the chroma part of the calculation */
nuclear@14 251 cb = GETJSAMPLE(*inptr1++);
nuclear@14 252 cr = GETJSAMPLE(*inptr2++);
nuclear@14 253 cred = Crrtab[cr];
nuclear@14 254 cgreen = (int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], SCALEBITS);
nuclear@14 255 cblue = Cbbtab[cb];
nuclear@14 256 /* Fetch 2 Y values and emit 2 pixels */
nuclear@14 257 y = GETJSAMPLE(*inptr0++);
nuclear@14 258 outptr[RGB_RED] = range_limit[y + cred];
nuclear@14 259 outptr[RGB_GREEN] = range_limit[y + cgreen];
nuclear@14 260 outptr[RGB_BLUE] = range_limit[y + cblue];
nuclear@14 261 outptr += RGB_PIXELSIZE;
nuclear@14 262 y = GETJSAMPLE(*inptr0++);
nuclear@14 263 outptr[RGB_RED] = range_limit[y + cred];
nuclear@14 264 outptr[RGB_GREEN] = range_limit[y + cgreen];
nuclear@14 265 outptr[RGB_BLUE] = range_limit[y + cblue];
nuclear@14 266 outptr += RGB_PIXELSIZE;
nuclear@14 267 }
nuclear@14 268 /* If image width is odd, do the last output column separately */
nuclear@14 269 if (cinfo->output_width & 1) {
nuclear@14 270 cb = GETJSAMPLE(*inptr1);
nuclear@14 271 cr = GETJSAMPLE(*inptr2);
nuclear@14 272 cred = Crrtab[cr];
nuclear@14 273 cgreen = (int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], SCALEBITS);
nuclear@14 274 cblue = Cbbtab[cb];
nuclear@14 275 y = GETJSAMPLE(*inptr0);
nuclear@14 276 outptr[RGB_RED] = range_limit[y + cred];
nuclear@14 277 outptr[RGB_GREEN] = range_limit[y + cgreen];
nuclear@14 278 outptr[RGB_BLUE] = range_limit[y + cblue];
nuclear@14 279 }
nuclear@14 280 }
nuclear@14 281
nuclear@14 282
nuclear@14 283 /*
nuclear@14 284 * Upsample and color convert for the case of 2:1 horizontal and 2:1 vertical.
nuclear@14 285 */
nuclear@14 286
nuclear@14 287 METHODDEF(void)
nuclear@14 288 h2v2_merged_upsample (j_decompress_ptr cinfo,
nuclear@14 289 JSAMPIMAGE input_buf, JDIMENSION in_row_group_ctr,
nuclear@14 290 JSAMPARRAY output_buf)
nuclear@14 291 {
nuclear@14 292 my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample;
nuclear@14 293 register int y, cred, cgreen, cblue;
nuclear@14 294 int cb, cr;
nuclear@14 295 register JSAMPROW outptr0, outptr1;
nuclear@14 296 JSAMPROW inptr00, inptr01, inptr1, inptr2;
nuclear@14 297 JDIMENSION col;
nuclear@14 298 /* copy these pointers into registers if possible */
nuclear@14 299 register JSAMPLE * range_limit = cinfo->sample_range_limit;
nuclear@14 300 int * Crrtab = upsample->Cr_r_tab;
nuclear@14 301 int * Cbbtab = upsample->Cb_b_tab;
nuclear@14 302 INT32 * Crgtab = upsample->Cr_g_tab;
nuclear@14 303 INT32 * Cbgtab = upsample->Cb_g_tab;
nuclear@14 304 SHIFT_TEMPS
nuclear@14 305
nuclear@14 306 inptr00 = input_buf[0][in_row_group_ctr*2];
nuclear@14 307 inptr01 = input_buf[0][in_row_group_ctr*2 + 1];
nuclear@14 308 inptr1 = input_buf[1][in_row_group_ctr];
nuclear@14 309 inptr2 = input_buf[2][in_row_group_ctr];
nuclear@14 310 outptr0 = output_buf[0];
nuclear@14 311 outptr1 = output_buf[1];
nuclear@14 312 /* Loop for each group of output pixels */
nuclear@14 313 for (col = cinfo->output_width >> 1; col > 0; col--) {
nuclear@14 314 /* Do the chroma part of the calculation */
nuclear@14 315 cb = GETJSAMPLE(*inptr1++);
nuclear@14 316 cr = GETJSAMPLE(*inptr2++);
nuclear@14 317 cred = Crrtab[cr];
nuclear@14 318 cgreen = (int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], SCALEBITS);
nuclear@14 319 cblue = Cbbtab[cb];
nuclear@14 320 /* Fetch 4 Y values and emit 4 pixels */
nuclear@14 321 y = GETJSAMPLE(*inptr00++);
nuclear@14 322 outptr0[RGB_RED] = range_limit[y + cred];
nuclear@14 323 outptr0[RGB_GREEN] = range_limit[y + cgreen];
nuclear@14 324 outptr0[RGB_BLUE] = range_limit[y + cblue];
nuclear@14 325 outptr0 += RGB_PIXELSIZE;
nuclear@14 326 y = GETJSAMPLE(*inptr00++);
nuclear@14 327 outptr0[RGB_RED] = range_limit[y + cred];
nuclear@14 328 outptr0[RGB_GREEN] = range_limit[y + cgreen];
nuclear@14 329 outptr0[RGB_BLUE] = range_limit[y + cblue];
nuclear@14 330 outptr0 += RGB_PIXELSIZE;
nuclear@14 331 y = GETJSAMPLE(*inptr01++);
nuclear@14 332 outptr1[RGB_RED] = range_limit[y + cred];
nuclear@14 333 outptr1[RGB_GREEN] = range_limit[y + cgreen];
nuclear@14 334 outptr1[RGB_BLUE] = range_limit[y + cblue];
nuclear@14 335 outptr1 += RGB_PIXELSIZE;
nuclear@14 336 y = GETJSAMPLE(*inptr01++);
nuclear@14 337 outptr1[RGB_RED] = range_limit[y + cred];
nuclear@14 338 outptr1[RGB_GREEN] = range_limit[y + cgreen];
nuclear@14 339 outptr1[RGB_BLUE] = range_limit[y + cblue];
nuclear@14 340 outptr1 += RGB_PIXELSIZE;
nuclear@14 341 }
nuclear@14 342 /* If image width is odd, do the last output column separately */
nuclear@14 343 if (cinfo->output_width & 1) {
nuclear@14 344 cb = GETJSAMPLE(*inptr1);
nuclear@14 345 cr = GETJSAMPLE(*inptr2);
nuclear@14 346 cred = Crrtab[cr];
nuclear@14 347 cgreen = (int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], SCALEBITS);
nuclear@14 348 cblue = Cbbtab[cb];
nuclear@14 349 y = GETJSAMPLE(*inptr00);
nuclear@14 350 outptr0[RGB_RED] = range_limit[y + cred];
nuclear@14 351 outptr0[RGB_GREEN] = range_limit[y + cgreen];
nuclear@14 352 outptr0[RGB_BLUE] = range_limit[y + cblue];
nuclear@14 353 y = GETJSAMPLE(*inptr01);
nuclear@14 354 outptr1[RGB_RED] = range_limit[y + cred];
nuclear@14 355 outptr1[RGB_GREEN] = range_limit[y + cgreen];
nuclear@14 356 outptr1[RGB_BLUE] = range_limit[y + cblue];
nuclear@14 357 }
nuclear@14 358 }
nuclear@14 359
nuclear@14 360
nuclear@14 361 /*
nuclear@14 362 * Module initialization routine for merged upsampling/color conversion.
nuclear@14 363 *
nuclear@14 364 * NB: this is called under the conditions determined by use_merged_upsample()
nuclear@14 365 * in jdmaster.c. That routine MUST correspond to the actual capabilities
nuclear@14 366 * of this module; no safety checks are made here.
nuclear@14 367 */
nuclear@14 368
nuclear@14 369 GLOBAL(void)
nuclear@14 370 jinit_merged_upsampler (j_decompress_ptr cinfo)
nuclear@14 371 {
nuclear@14 372 my_upsample_ptr upsample;
nuclear@14 373
nuclear@14 374 upsample = (my_upsample_ptr)
nuclear@14 375 (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
nuclear@14 376 SIZEOF(my_upsampler));
nuclear@14 377 cinfo->upsample = (struct jpeg_upsampler *) upsample;
nuclear@14 378 upsample->pub.start_pass = start_pass_merged_upsample;
nuclear@14 379 upsample->pub.need_context_rows = FALSE;
nuclear@14 380
nuclear@14 381 upsample->out_row_width = cinfo->output_width * cinfo->out_color_components;
nuclear@14 382
nuclear@14 383 if (cinfo->max_v_samp_factor == 2) {
nuclear@14 384 upsample->pub.upsample = merged_2v_upsample;
nuclear@14 385 upsample->upmethod = h2v2_merged_upsample;
nuclear@14 386 /* Allocate a spare row buffer */
nuclear@14 387 upsample->spare_row = (JSAMPROW)
nuclear@14 388 (*cinfo->mem->alloc_large) ((j_common_ptr) cinfo, JPOOL_IMAGE,
nuclear@14 389 (size_t) (upsample->out_row_width * SIZEOF(JSAMPLE)));
nuclear@14 390 } else {
nuclear@14 391 upsample->pub.upsample = merged_1v_upsample;
nuclear@14 392 upsample->upmethod = h2v1_merged_upsample;
nuclear@14 393 /* No spare row needed */
nuclear@14 394 upsample->spare_row = NULL;
nuclear@14 395 }
nuclear@14 396
nuclear@14 397 build_ycc_rgb_table(cinfo);
nuclear@14 398 }
nuclear@14 399
nuclear@14 400 #endif /* UPSAMPLE_MERGING_SUPPORTED */