Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 1 | /* |
| 2 | * jdmerge.c |
| 3 | * |
Thomas G. Lane | 489583f | 1996-02-07 00:00:00 +0000 | [diff] [blame] | 4 | * Copyright (C) 1994-1996, Thomas G. Lane. |
Pierre Ossman | 59a3938 | 2009-03-09 13:15:56 +0000 | [diff] [blame] | 5 | * Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB |
DRC | b4570bb | 2011-09-07 06:31:00 +0000 | [diff] [blame] | 6 | * Copyright (C) 2009, 2011, D. R. Commander. |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 7 | * This file is part of the Independent JPEG Group's software. |
| 8 | * For conditions of distribution and use, see the accompanying README file. |
| 9 | * |
| 10 | * This file contains code for merged upsampling/color conversion. |
| 11 | * |
| 12 | * This file combines functions from jdsample.c and jdcolor.c; |
| 13 | * read those files first to understand what's going on. |
| 14 | * |
| 15 | * When the chroma components are to be upsampled by simple replication |
| 16 | * (ie, box filtering), we can save some work in color conversion by |
| 17 | * calculating all the output pixels corresponding to a pair of chroma |
| 18 | * samples at one time. In the conversion equations |
| 19 | * R = Y + K1 * Cr |
| 20 | * G = Y + K2 * Cb + K3 * Cr |
| 21 | * B = Y + K4 * Cb |
| 22 | * only the Y term varies among the group of pixels corresponding to a pair |
| 23 | * of chroma samples, so the rest of the terms can be calculated just once. |
| 24 | * At typical sampling ratios, this eliminates half or three-quarters of the |
| 25 | * multiplications needed for color conversion. |
| 26 | * |
| 27 | * This file currently provides implementations for the following cases: |
| 28 | * YCbCr => RGB color conversion only. |
| 29 | * Sampling ratios of 2h1v or 2h2v. |
| 30 | * No scaling needed at upsample time. |
| 31 | * Corner-aligned (non-CCIR601) sampling alignment. |
| 32 | * Other special cases could be added, but in most applications these are |
| 33 | * the only common cases. (For uncommon cases we fall back on the more |
| 34 | * general code in jdsample.c and jdcolor.c.) |
| 35 | */ |
| 36 | |
| 37 | #define JPEG_INTERNALS |
| 38 | #include "jinclude.h" |
| 39 | #include "jpeglib.h" |
Pierre Ossman | 59a3938 | 2009-03-09 13:15:56 +0000 | [diff] [blame] | 40 | #include "jsimd.h" |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 41 | |
| 42 | #ifdef UPSAMPLE_MERGING_SUPPORTED |
| 43 | |
| 44 | |
| 45 | /* Private subobject */ |
| 46 | |
| 47 | typedef struct { |
| 48 | struct jpeg_upsampler pub; /* public fields */ |
| 49 | |
| 50 | /* Pointer to routine to do actual upsampling/conversion of one row group */ |
| 51 | JMETHOD(void, upmethod, (j_decompress_ptr cinfo, |
| 52 | JSAMPIMAGE input_buf, JDIMENSION in_row_group_ctr, |
| 53 | JSAMPARRAY output_buf)); |
| 54 | |
| 55 | /* Private state for YCC->RGB conversion */ |
| 56 | int * Cr_r_tab; /* => table for Cr to R conversion */ |
| 57 | int * Cb_b_tab; /* => table for Cb to B conversion */ |
| 58 | INT32 * Cr_g_tab; /* => table for Cr to G conversion */ |
| 59 | INT32 * Cb_g_tab; /* => table for Cb to G conversion */ |
| 60 | |
| 61 | /* For 2:1 vertical sampling, we produce two output rows at a time. |
| 62 | * We need a "spare" row buffer to hold the second output row if the |
| 63 | * application provides just a one-row buffer; we also use the spare |
| 64 | * to discard the dummy last row if the image height is odd. |
| 65 | */ |
| 66 | JSAMPROW spare_row; |
| 67 | boolean spare_full; /* T if spare buffer is occupied */ |
| 68 | |
| 69 | JDIMENSION out_row_width; /* samples per output row */ |
| 70 | JDIMENSION rows_to_go; /* counts rows remaining in image */ |
| 71 | } my_upsampler; |
| 72 | |
| 73 | typedef my_upsampler * my_upsample_ptr; |
| 74 | |
| 75 | #define SCALEBITS 16 /* speediest right-shift on some machines */ |
| 76 | #define ONE_HALF ((INT32) 1 << (SCALEBITS-1)) |
| 77 | #define FIX(x) ((INT32) ((x) * (1L<<SCALEBITS) + 0.5)) |
| 78 | |
| 79 | |
DRC | b4570bb | 2011-09-07 06:31:00 +0000 | [diff] [blame] | 80 | /* Include inline routines for colorspace extensions */ |
| 81 | |
| 82 | #include "jdmrgext.c" |
| 83 | #undef RGB_RED |
| 84 | #undef RGB_GREEN |
| 85 | #undef RGB_BLUE |
| 86 | #undef RGB_PIXELSIZE |
| 87 | |
| 88 | #define RGB_RED EXT_RGB_RED |
| 89 | #define RGB_GREEN EXT_RGB_GREEN |
| 90 | #define RGB_BLUE EXT_RGB_BLUE |
| 91 | #define RGB_PIXELSIZE EXT_RGB_PIXELSIZE |
| 92 | #define h2v1_merged_upsample_internal extrgb_h2v1_merged_upsample_internal |
| 93 | #define h2v2_merged_upsample_internal extrgb_h2v2_merged_upsample_internal |
| 94 | #include "jdmrgext.c" |
| 95 | #undef RGB_RED |
| 96 | #undef RGB_GREEN |
| 97 | #undef RGB_BLUE |
| 98 | #undef RGB_PIXELSIZE |
| 99 | #undef h2v1_merged_upsample_internal |
| 100 | #undef h2v2_merged_upsample_internal |
| 101 | |
| 102 | #define RGB_RED EXT_RGBX_RED |
| 103 | #define RGB_GREEN EXT_RGBX_GREEN |
| 104 | #define RGB_BLUE EXT_RGBX_BLUE |
| 105 | #define RGB_PIXELSIZE EXT_RGBX_PIXELSIZE |
| 106 | #define h2v1_merged_upsample_internal extrgbx_h2v1_merged_upsample_internal |
| 107 | #define h2v2_merged_upsample_internal extrgbx_h2v2_merged_upsample_internal |
| 108 | #include "jdmrgext.c" |
| 109 | #undef RGB_RED |
| 110 | #undef RGB_GREEN |
| 111 | #undef RGB_BLUE |
| 112 | #undef RGB_PIXELSIZE |
| 113 | #undef h2v1_merged_upsample_internal |
| 114 | #undef h2v2_merged_upsample_internal |
| 115 | |
| 116 | #define RGB_RED EXT_BGR_RED |
| 117 | #define RGB_GREEN EXT_BGR_GREEN |
| 118 | #define RGB_BLUE EXT_BGR_BLUE |
| 119 | #define RGB_PIXELSIZE EXT_BGR_PIXELSIZE |
| 120 | #define h2v1_merged_upsample_internal extbgr_h2v1_merged_upsample_internal |
| 121 | #define h2v2_merged_upsample_internal extbgr_h2v2_merged_upsample_internal |
| 122 | #include "jdmrgext.c" |
| 123 | #undef RGB_RED |
| 124 | #undef RGB_GREEN |
| 125 | #undef RGB_BLUE |
| 126 | #undef RGB_PIXELSIZE |
| 127 | #undef h2v1_merged_upsample_internal |
| 128 | #undef h2v2_merged_upsample_internal |
| 129 | |
| 130 | #define RGB_RED EXT_BGRX_RED |
| 131 | #define RGB_GREEN EXT_BGRX_GREEN |
| 132 | #define RGB_BLUE EXT_BGRX_BLUE |
| 133 | #define RGB_PIXELSIZE EXT_BGRX_PIXELSIZE |
| 134 | #define h2v1_merged_upsample_internal extbgrx_h2v1_merged_upsample_internal |
| 135 | #define h2v2_merged_upsample_internal extbgrx_h2v2_merged_upsample_internal |
| 136 | #include "jdmrgext.c" |
| 137 | #undef RGB_RED |
| 138 | #undef RGB_GREEN |
| 139 | #undef RGB_BLUE |
| 140 | #undef RGB_PIXELSIZE |
| 141 | #undef h2v1_merged_upsample_internal |
| 142 | #undef h2v2_merged_upsample_internal |
| 143 | |
| 144 | #define RGB_RED EXT_XBGR_RED |
| 145 | #define RGB_GREEN EXT_XBGR_GREEN |
| 146 | #define RGB_BLUE EXT_XBGR_BLUE |
| 147 | #define RGB_PIXELSIZE EXT_XBGR_PIXELSIZE |
| 148 | #define h2v1_merged_upsample_internal extxbgr_h2v1_merged_upsample_internal |
| 149 | #define h2v2_merged_upsample_internal extxbgr_h2v2_merged_upsample_internal |
| 150 | #include "jdmrgext.c" |
| 151 | #undef RGB_RED |
| 152 | #undef RGB_GREEN |
| 153 | #undef RGB_BLUE |
| 154 | #undef RGB_PIXELSIZE |
| 155 | #undef h2v1_merged_upsample_internal |
| 156 | #undef h2v2_merged_upsample_internal |
| 157 | |
| 158 | #define RGB_RED EXT_XRGB_RED |
| 159 | #define RGB_GREEN EXT_XRGB_GREEN |
| 160 | #define RGB_BLUE EXT_XRGB_BLUE |
| 161 | #define RGB_PIXELSIZE EXT_XRGB_PIXELSIZE |
| 162 | #define h2v1_merged_upsample_internal extxrgb_h2v1_merged_upsample_internal |
| 163 | #define h2v2_merged_upsample_internal extxrgb_h2v2_merged_upsample_internal |
| 164 | #include "jdmrgext.c" |
| 165 | #undef RGB_RED |
| 166 | #undef RGB_GREEN |
| 167 | #undef RGB_BLUE |
| 168 | #undef RGB_PIXELSIZE |
| 169 | #undef h2v1_merged_upsample_internal |
| 170 | #undef h2v2_merged_upsample_internal |
| 171 | |
| 172 | |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 173 | /* |
Thomas G. Lane | bc79e06 | 1995-08-02 00:00:00 +0000 | [diff] [blame] | 174 | * Initialize tables for YCC->RGB colorspace conversion. |
| 175 | * This is taken directly from jdcolor.c; see that file for more info. |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 176 | */ |
| 177 | |
Thomas G. Lane | 489583f | 1996-02-07 00:00:00 +0000 | [diff] [blame] | 178 | LOCAL(void) |
Thomas G. Lane | bc79e06 | 1995-08-02 00:00:00 +0000 | [diff] [blame] | 179 | build_ycc_rgb_table (j_decompress_ptr cinfo) |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 180 | { |
| 181 | my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample; |
Thomas G. Lane | bc79e06 | 1995-08-02 00:00:00 +0000 | [diff] [blame] | 182 | int i; |
| 183 | INT32 x; |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 184 | SHIFT_TEMPS |
| 185 | |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 186 | upsample->Cr_r_tab = (int *) |
| 187 | (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, |
| 188 | (MAXJSAMPLE+1) * SIZEOF(int)); |
| 189 | upsample->Cb_b_tab = (int *) |
| 190 | (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, |
| 191 | (MAXJSAMPLE+1) * SIZEOF(int)); |
| 192 | upsample->Cr_g_tab = (INT32 *) |
| 193 | (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, |
| 194 | (MAXJSAMPLE+1) * SIZEOF(INT32)); |
| 195 | upsample->Cb_g_tab = (INT32 *) |
| 196 | (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, |
| 197 | (MAXJSAMPLE+1) * SIZEOF(INT32)); |
| 198 | |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 199 | for (i = 0, x = -CENTERJSAMPLE; i <= MAXJSAMPLE; i++, x++) { |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 200 | /* i is the actual input pixel value, in the range 0..MAXJSAMPLE */ |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 201 | /* The Cb or Cr value we are thinking of is x = i - CENTERJSAMPLE */ |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 202 | /* Cr=>R value is nearest int to 1.40200 * x */ |
| 203 | upsample->Cr_r_tab[i] = (int) |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 204 | RIGHT_SHIFT(FIX(1.40200) * x + ONE_HALF, SCALEBITS); |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 205 | /* Cb=>B value is nearest int to 1.77200 * x */ |
| 206 | upsample->Cb_b_tab[i] = (int) |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 207 | RIGHT_SHIFT(FIX(1.77200) * x + ONE_HALF, SCALEBITS); |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 208 | /* Cr=>G value is scaled-up -0.71414 * x */ |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 209 | upsample->Cr_g_tab[i] = (- FIX(0.71414)) * x; |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 210 | /* Cb=>G value is scaled-up -0.34414 * x */ |
| 211 | /* We also add in ONE_HALF so that need not do it in inner loop */ |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 212 | upsample->Cb_g_tab[i] = (- FIX(0.34414)) * x + ONE_HALF; |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 213 | } |
| 214 | } |
| 215 | |
| 216 | |
| 217 | /* |
Thomas G. Lane | bc79e06 | 1995-08-02 00:00:00 +0000 | [diff] [blame] | 218 | * Initialize for an upsampling pass. |
| 219 | */ |
| 220 | |
Thomas G. Lane | 489583f | 1996-02-07 00:00:00 +0000 | [diff] [blame] | 221 | METHODDEF(void) |
Thomas G. Lane | bc79e06 | 1995-08-02 00:00:00 +0000 | [diff] [blame] | 222 | start_pass_merged_upsample (j_decompress_ptr cinfo) |
| 223 | { |
| 224 | my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample; |
| 225 | |
| 226 | /* Mark the spare buffer empty */ |
| 227 | upsample->spare_full = FALSE; |
| 228 | /* Initialize total-height counter for detecting bottom of image */ |
| 229 | upsample->rows_to_go = cinfo->output_height; |
| 230 | } |
| 231 | |
| 232 | |
| 233 | /* |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 234 | * Control routine to do upsampling (and color conversion). |
| 235 | * |
| 236 | * The control routine just handles the row buffering considerations. |
| 237 | */ |
| 238 | |
Thomas G. Lane | 489583f | 1996-02-07 00:00:00 +0000 | [diff] [blame] | 239 | METHODDEF(void) |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 240 | merged_2v_upsample (j_decompress_ptr cinfo, |
| 241 | JSAMPIMAGE input_buf, JDIMENSION *in_row_group_ctr, |
| 242 | JDIMENSION in_row_groups_avail, |
| 243 | JSAMPARRAY output_buf, JDIMENSION *out_row_ctr, |
| 244 | JDIMENSION out_rows_avail) |
| 245 | /* 2:1 vertical sampling case: may need a spare row. */ |
| 246 | { |
| 247 | my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample; |
| 248 | JSAMPROW work_ptrs[2]; |
| 249 | JDIMENSION num_rows; /* number of rows returned to caller */ |
| 250 | |
| 251 | if (upsample->spare_full) { |
| 252 | /* If we have a spare row saved from a previous cycle, just return it. */ |
| 253 | jcopy_sample_rows(& upsample->spare_row, 0, output_buf + *out_row_ctr, 0, |
| 254 | 1, upsample->out_row_width); |
| 255 | num_rows = 1; |
| 256 | upsample->spare_full = FALSE; |
| 257 | } else { |
| 258 | /* Figure number of rows to return to caller. */ |
| 259 | num_rows = 2; |
| 260 | /* Not more than the distance to the end of the image. */ |
| 261 | if (num_rows > upsample->rows_to_go) |
| 262 | num_rows = upsample->rows_to_go; |
| 263 | /* And not more than what the client can accept: */ |
| 264 | out_rows_avail -= *out_row_ctr; |
| 265 | if (num_rows > out_rows_avail) |
| 266 | num_rows = out_rows_avail; |
| 267 | /* Create output pointer array for upsampler. */ |
| 268 | work_ptrs[0] = output_buf[*out_row_ctr]; |
| 269 | if (num_rows > 1) { |
| 270 | work_ptrs[1] = output_buf[*out_row_ctr + 1]; |
| 271 | } else { |
| 272 | work_ptrs[1] = upsample->spare_row; |
| 273 | upsample->spare_full = TRUE; |
| 274 | } |
| 275 | /* Now do the upsampling. */ |
| 276 | (*upsample->upmethod) (cinfo, input_buf, *in_row_group_ctr, work_ptrs); |
| 277 | } |
| 278 | |
| 279 | /* Adjust counts */ |
| 280 | *out_row_ctr += num_rows; |
| 281 | upsample->rows_to_go -= num_rows; |
| 282 | /* When the buffer is emptied, declare this input row group consumed */ |
| 283 | if (! upsample->spare_full) |
| 284 | (*in_row_group_ctr)++; |
| 285 | } |
| 286 | |
| 287 | |
Thomas G. Lane | 489583f | 1996-02-07 00:00:00 +0000 | [diff] [blame] | 288 | METHODDEF(void) |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 289 | merged_1v_upsample (j_decompress_ptr cinfo, |
| 290 | JSAMPIMAGE input_buf, JDIMENSION *in_row_group_ctr, |
| 291 | JDIMENSION in_row_groups_avail, |
| 292 | JSAMPARRAY output_buf, JDIMENSION *out_row_ctr, |
| 293 | JDIMENSION out_rows_avail) |
| 294 | /* 1:1 vertical sampling case: much easier, never need a spare row. */ |
| 295 | { |
| 296 | my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample; |
| 297 | |
| 298 | /* Just do the upsampling. */ |
| 299 | (*upsample->upmethod) (cinfo, input_buf, *in_row_group_ctr, |
| 300 | output_buf + *out_row_ctr); |
| 301 | /* Adjust counts */ |
| 302 | (*out_row_ctr)++; |
| 303 | (*in_row_group_ctr)++; |
| 304 | } |
| 305 | |
| 306 | |
| 307 | /* |
| 308 | * These are the routines invoked by the control routines to do |
| 309 | * the actual upsampling/conversion. One row group is processed per call. |
| 310 | * |
| 311 | * Note: since we may be writing directly into application-supplied buffers, |
| 312 | * we have to be honest about the output width; we can't assume the buffer |
| 313 | * has been rounded up to an even width. |
| 314 | */ |
| 315 | |
| 316 | |
| 317 | /* |
| 318 | * Upsample and color convert for the case of 2:1 horizontal and 1:1 vertical. |
| 319 | */ |
| 320 | |
Thomas G. Lane | 489583f | 1996-02-07 00:00:00 +0000 | [diff] [blame] | 321 | METHODDEF(void) |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 322 | h2v1_merged_upsample (j_decompress_ptr cinfo, |
| 323 | JSAMPIMAGE input_buf, JDIMENSION in_row_group_ctr, |
| 324 | JSAMPARRAY output_buf) |
| 325 | { |
DRC | b4570bb | 2011-09-07 06:31:00 +0000 | [diff] [blame] | 326 | switch (cinfo->out_color_space) { |
| 327 | case JCS_EXT_RGB: |
| 328 | extrgb_h2v1_merged_upsample_internal(cinfo, input_buf, in_row_group_ctr, |
| 329 | output_buf); |
| 330 | break; |
| 331 | case JCS_EXT_RGBX: |
DRC | 67ce3b2 | 2011-12-19 02:21:03 +0000 | [diff] [blame^] | 332 | case JCS_EXT_RGBA: |
DRC | b4570bb | 2011-09-07 06:31:00 +0000 | [diff] [blame] | 333 | extrgbx_h2v1_merged_upsample_internal(cinfo, input_buf, in_row_group_ctr, |
| 334 | output_buf); |
| 335 | break; |
| 336 | case JCS_EXT_BGR: |
| 337 | extbgr_h2v1_merged_upsample_internal(cinfo, input_buf, in_row_group_ctr, |
| 338 | output_buf); |
| 339 | break; |
| 340 | case JCS_EXT_BGRX: |
DRC | 67ce3b2 | 2011-12-19 02:21:03 +0000 | [diff] [blame^] | 341 | case JCS_EXT_BGRA: |
DRC | b4570bb | 2011-09-07 06:31:00 +0000 | [diff] [blame] | 342 | extbgrx_h2v1_merged_upsample_internal(cinfo, input_buf, in_row_group_ctr, |
| 343 | output_buf); |
| 344 | break; |
| 345 | case JCS_EXT_XBGR: |
DRC | 67ce3b2 | 2011-12-19 02:21:03 +0000 | [diff] [blame^] | 346 | case JCS_EXT_ABGR: |
DRC | b4570bb | 2011-09-07 06:31:00 +0000 | [diff] [blame] | 347 | extxbgr_h2v1_merged_upsample_internal(cinfo, input_buf, in_row_group_ctr, |
| 348 | output_buf); |
| 349 | break; |
| 350 | case JCS_EXT_XRGB: |
DRC | 67ce3b2 | 2011-12-19 02:21:03 +0000 | [diff] [blame^] | 351 | case JCS_EXT_ARGB: |
DRC | b4570bb | 2011-09-07 06:31:00 +0000 | [diff] [blame] | 352 | extxrgb_h2v1_merged_upsample_internal(cinfo, input_buf, in_row_group_ctr, |
| 353 | output_buf); |
| 354 | break; |
| 355 | default: |
| 356 | h2v1_merged_upsample_internal(cinfo, input_buf, in_row_group_ctr, |
| 357 | output_buf); |
| 358 | break; |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 359 | } |
| 360 | } |
| 361 | |
| 362 | |
| 363 | /* |
| 364 | * Upsample and color convert for the case of 2:1 horizontal and 2:1 vertical. |
| 365 | */ |
| 366 | |
Thomas G. Lane | 489583f | 1996-02-07 00:00:00 +0000 | [diff] [blame] | 367 | METHODDEF(void) |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 368 | h2v2_merged_upsample (j_decompress_ptr cinfo, |
| 369 | JSAMPIMAGE input_buf, JDIMENSION in_row_group_ctr, |
| 370 | JSAMPARRAY output_buf) |
| 371 | { |
DRC | b4570bb | 2011-09-07 06:31:00 +0000 | [diff] [blame] | 372 | switch (cinfo->out_color_space) { |
| 373 | case JCS_EXT_RGB: |
| 374 | extrgb_h2v2_merged_upsample_internal(cinfo, input_buf, in_row_group_ctr, |
| 375 | output_buf); |
| 376 | break; |
| 377 | case JCS_EXT_RGBX: |
DRC | 67ce3b2 | 2011-12-19 02:21:03 +0000 | [diff] [blame^] | 378 | case JCS_EXT_RGBA: |
DRC | b4570bb | 2011-09-07 06:31:00 +0000 | [diff] [blame] | 379 | extrgbx_h2v2_merged_upsample_internal(cinfo, input_buf, in_row_group_ctr, |
| 380 | output_buf); |
| 381 | break; |
| 382 | case JCS_EXT_BGR: |
| 383 | extbgr_h2v2_merged_upsample_internal(cinfo, input_buf, in_row_group_ctr, |
| 384 | output_buf); |
| 385 | break; |
| 386 | case JCS_EXT_BGRX: |
DRC | 67ce3b2 | 2011-12-19 02:21:03 +0000 | [diff] [blame^] | 387 | case JCS_EXT_BGRA: |
DRC | b4570bb | 2011-09-07 06:31:00 +0000 | [diff] [blame] | 388 | extbgrx_h2v2_merged_upsample_internal(cinfo, input_buf, in_row_group_ctr, |
| 389 | output_buf); |
| 390 | break; |
| 391 | case JCS_EXT_XBGR: |
DRC | 67ce3b2 | 2011-12-19 02:21:03 +0000 | [diff] [blame^] | 392 | case JCS_EXT_ABGR: |
DRC | b4570bb | 2011-09-07 06:31:00 +0000 | [diff] [blame] | 393 | extxbgr_h2v2_merged_upsample_internal(cinfo, input_buf, in_row_group_ctr, |
| 394 | output_buf); |
| 395 | break; |
| 396 | case JCS_EXT_XRGB: |
DRC | 67ce3b2 | 2011-12-19 02:21:03 +0000 | [diff] [blame^] | 397 | case JCS_EXT_ARGB: |
DRC | b4570bb | 2011-09-07 06:31:00 +0000 | [diff] [blame] | 398 | extxrgb_h2v2_merged_upsample_internal(cinfo, input_buf, in_row_group_ctr, |
| 399 | output_buf); |
| 400 | break; |
| 401 | default: |
| 402 | h2v2_merged_upsample_internal(cinfo, input_buf, in_row_group_ctr, |
| 403 | output_buf); |
| 404 | break; |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 405 | } |
| 406 | } |
| 407 | |
| 408 | |
| 409 | /* |
| 410 | * Module initialization routine for merged upsampling/color conversion. |
| 411 | * |
| 412 | * NB: this is called under the conditions determined by use_merged_upsample() |
| 413 | * in jdmaster.c. That routine MUST correspond to the actual capabilities |
| 414 | * of this module; no safety checks are made here. |
| 415 | */ |
| 416 | |
Thomas G. Lane | 489583f | 1996-02-07 00:00:00 +0000 | [diff] [blame] | 417 | GLOBAL(void) |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 418 | jinit_merged_upsampler (j_decompress_ptr cinfo) |
| 419 | { |
| 420 | my_upsample_ptr upsample; |
| 421 | |
| 422 | upsample = (my_upsample_ptr) |
| 423 | (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, |
| 424 | SIZEOF(my_upsampler)); |
| 425 | cinfo->upsample = (struct jpeg_upsampler *) upsample; |
| 426 | upsample->pub.start_pass = start_pass_merged_upsample; |
| 427 | upsample->pub.need_context_rows = FALSE; |
| 428 | |
| 429 | upsample->out_row_width = cinfo->output_width * cinfo->out_color_components; |
| 430 | |
| 431 | if (cinfo->max_v_samp_factor == 2) { |
| 432 | upsample->pub.upsample = merged_2v_upsample; |
Pierre Ossman | 59a3938 | 2009-03-09 13:15:56 +0000 | [diff] [blame] | 433 | if (jsimd_can_h2v2_merged_upsample()) |
| 434 | upsample->upmethod = jsimd_h2v2_merged_upsample; |
| 435 | else |
| 436 | upsample->upmethod = h2v2_merged_upsample; |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 437 | /* Allocate a spare row buffer */ |
| 438 | upsample->spare_row = (JSAMPROW) |
| 439 | (*cinfo->mem->alloc_large) ((j_common_ptr) cinfo, JPOOL_IMAGE, |
| 440 | (size_t) (upsample->out_row_width * SIZEOF(JSAMPLE))); |
| 441 | } else { |
| 442 | upsample->pub.upsample = merged_1v_upsample; |
Pierre Ossman | 59a3938 | 2009-03-09 13:15:56 +0000 | [diff] [blame] | 443 | if (jsimd_can_h2v1_merged_upsample()) |
| 444 | upsample->upmethod = jsimd_h2v1_merged_upsample; |
| 445 | else |
| 446 | upsample->upmethod = h2v1_merged_upsample; |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 447 | /* No spare row needed */ |
| 448 | upsample->spare_row = NULL; |
| 449 | } |
Thomas G. Lane | bc79e06 | 1995-08-02 00:00:00 +0000 | [diff] [blame] | 450 | |
| 451 | build_ycc_rgb_table(cinfo); |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 452 | } |
| 453 | |
| 454 | #endif /* UPSAMPLE_MERGING_SUPPORTED */ |