DRC | 72a3cc0 | 2014-08-30 20:37:50 +0000 | [diff] [blame] | 1 | /* |
| 2 | * jdmrg565.c |
| 3 | * |
| 4 | * This file was part of the Independent JPEG Group's software: |
| 5 | * Copyright (C) 1994-1996, Thomas G. Lane. |
| 6 | * libjpeg-turbo Modifications: |
| 7 | * Copyright (C) 2013, Linaro Limited. |
DRC | 1e32fe3 | 2015-10-14 17:32:39 -0500 | [diff] [blame] | 8 | * Copyright (C) 2014-2015, D. R. Commander. |
DRC | 7e3acc0 | 2015-10-10 10:25:46 -0500 | [diff] [blame] | 9 | * For conditions of distribution and use, see the accompanying README.ijg |
| 10 | * file. |
DRC | 72a3cc0 | 2014-08-30 20:37:50 +0000 | [diff] [blame] | 11 | * |
| 12 | * This file contains code for merged upsampling/color conversion. |
| 13 | */ |
| 14 | |
| 15 | |
| 16 | INLINE |
| 17 | LOCAL(void) |
| 18 | h2v1_merged_upsample_565_internal (j_decompress_ptr cinfo, |
| 19 | JSAMPIMAGE input_buf, |
| 20 | JDIMENSION in_row_group_ctr, |
| 21 | JSAMPARRAY output_buf) |
| 22 | { |
| 23 | my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample; |
| 24 | register int y, cred, cgreen, cblue; |
| 25 | int cb, cr; |
| 26 | register JSAMPROW outptr; |
| 27 | JSAMPROW inptr0, inptr1, inptr2; |
| 28 | JDIMENSION col; |
| 29 | /* copy these pointers into registers if possible */ |
| 30 | register JSAMPLE * range_limit = cinfo->sample_range_limit; |
| 31 | int * Crrtab = upsample->Cr_r_tab; |
| 32 | int * Cbbtab = upsample->Cb_b_tab; |
DRC | 1e32fe3 | 2015-10-14 17:32:39 -0500 | [diff] [blame] | 33 | JLONG * Crgtab = upsample->Cr_g_tab; |
| 34 | JLONG * Cbgtab = upsample->Cb_g_tab; |
DRC | 72a3cc0 | 2014-08-30 20:37:50 +0000 | [diff] [blame] | 35 | unsigned int r, g, b; |
DRC | 1e32fe3 | 2015-10-14 17:32:39 -0500 | [diff] [blame] | 36 | JLONG rgb; |
DRC | 72a3cc0 | 2014-08-30 20:37:50 +0000 | [diff] [blame] | 37 | SHIFT_TEMPS |
| 38 | |
| 39 | inptr0 = input_buf[0][in_row_group_ctr]; |
| 40 | inptr1 = input_buf[1][in_row_group_ctr]; |
| 41 | inptr2 = input_buf[2][in_row_group_ctr]; |
| 42 | outptr = output_buf[0]; |
| 43 | |
| 44 | /* Loop for each pair of output pixels */ |
| 45 | for (col = cinfo->output_width >> 1; col > 0; col--) { |
| 46 | /* Do the chroma part of the calculation */ |
| 47 | cb = GETJSAMPLE(*inptr1++); |
| 48 | cr = GETJSAMPLE(*inptr2++); |
| 49 | cred = Crrtab[cr]; |
| 50 | cgreen = (int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], SCALEBITS); |
| 51 | cblue = Cbbtab[cb]; |
| 52 | |
| 53 | /* Fetch 2 Y values and emit 2 pixels */ |
| 54 | y = GETJSAMPLE(*inptr0++); |
| 55 | r = range_limit[y + cred]; |
| 56 | g = range_limit[y + cgreen]; |
| 57 | b = range_limit[y + cblue]; |
| 58 | rgb = PACK_SHORT_565(r, g, b); |
| 59 | |
| 60 | y = GETJSAMPLE(*inptr0++); |
| 61 | r = range_limit[y + cred]; |
| 62 | g = range_limit[y + cgreen]; |
| 63 | b = range_limit[y + cblue]; |
| 64 | rgb = PACK_TWO_PIXELS(rgb, PACK_SHORT_565(r, g, b)); |
| 65 | |
| 66 | WRITE_TWO_PIXELS(outptr, rgb); |
| 67 | outptr += 4; |
| 68 | } |
| 69 | |
| 70 | /* If image width is odd, do the last output column separately */ |
| 71 | if (cinfo->output_width & 1) { |
| 72 | cb = GETJSAMPLE(*inptr1); |
| 73 | cr = GETJSAMPLE(*inptr2); |
| 74 | cred = Crrtab[cr]; |
| 75 | cgreen = (int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], SCALEBITS); |
| 76 | cblue = Cbbtab[cb]; |
| 77 | y = GETJSAMPLE(*inptr0); |
| 78 | r = range_limit[y + cred]; |
| 79 | g = range_limit[y + cgreen]; |
| 80 | b = range_limit[y + cblue]; |
| 81 | rgb = PACK_SHORT_565(r, g, b); |
DRC | aa769fe | 2015-10-15 02:25:00 -0500 | [diff] [blame] | 82 | *(INT16*)outptr = (INT16)rgb; |
DRC | 72a3cc0 | 2014-08-30 20:37:50 +0000 | [diff] [blame] | 83 | } |
| 84 | } |
| 85 | |
| 86 | |
| 87 | INLINE |
| 88 | LOCAL(void) |
| 89 | h2v1_merged_upsample_565D_internal (j_decompress_ptr cinfo, |
| 90 | JSAMPIMAGE input_buf, |
| 91 | JDIMENSION in_row_group_ctr, |
| 92 | JSAMPARRAY output_buf) |
| 93 | { |
| 94 | my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample; |
| 95 | register int y, cred, cgreen, cblue; |
| 96 | int cb, cr; |
| 97 | register JSAMPROW outptr; |
| 98 | JSAMPROW inptr0, inptr1, inptr2; |
| 99 | JDIMENSION col; |
| 100 | /* copy these pointers into registers if possible */ |
| 101 | register JSAMPLE * range_limit = cinfo->sample_range_limit; |
| 102 | int * Crrtab = upsample->Cr_r_tab; |
| 103 | int * Cbbtab = upsample->Cb_b_tab; |
DRC | 1e32fe3 | 2015-10-14 17:32:39 -0500 | [diff] [blame] | 104 | JLONG * Crgtab = upsample->Cr_g_tab; |
| 105 | JLONG * Cbgtab = upsample->Cb_g_tab; |
| 106 | JLONG d0 = dither_matrix[cinfo->output_scanline & DITHER_MASK]; |
DRC | 72a3cc0 | 2014-08-30 20:37:50 +0000 | [diff] [blame] | 107 | unsigned int r, g, b; |
DRC | 1e32fe3 | 2015-10-14 17:32:39 -0500 | [diff] [blame] | 108 | JLONG rgb; |
DRC | 72a3cc0 | 2014-08-30 20:37:50 +0000 | [diff] [blame] | 109 | SHIFT_TEMPS |
| 110 | |
| 111 | inptr0 = input_buf[0][in_row_group_ctr]; |
| 112 | inptr1 = input_buf[1][in_row_group_ctr]; |
| 113 | inptr2 = input_buf[2][in_row_group_ctr]; |
| 114 | outptr = output_buf[0]; |
| 115 | |
| 116 | /* Loop for each pair of output pixels */ |
| 117 | for (col = cinfo->output_width >> 1; col > 0; col--) { |
| 118 | /* Do the chroma part of the calculation */ |
| 119 | cb = GETJSAMPLE(*inptr1++); |
| 120 | cr = GETJSAMPLE(*inptr2++); |
| 121 | cred = Crrtab[cr]; |
| 122 | cgreen = (int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], SCALEBITS); |
| 123 | cblue = Cbbtab[cb]; |
| 124 | |
| 125 | /* Fetch 2 Y values and emit 2 pixels */ |
| 126 | y = GETJSAMPLE(*inptr0++); |
| 127 | r = range_limit[DITHER_565_R(y + cred, d0)]; |
| 128 | g = range_limit[DITHER_565_G(y + cgreen, d0)]; |
| 129 | b = range_limit[DITHER_565_B(y + cblue, d0)]; |
| 130 | d0 = DITHER_ROTATE(d0); |
| 131 | rgb = PACK_SHORT_565(r, g, b); |
| 132 | |
| 133 | y = GETJSAMPLE(*inptr0++); |
| 134 | r = range_limit[DITHER_565_R(y + cred, d0)]; |
| 135 | g = range_limit[DITHER_565_G(y + cgreen, d0)]; |
| 136 | b = range_limit[DITHER_565_B(y + cblue, d0)]; |
| 137 | d0 = DITHER_ROTATE(d0); |
| 138 | rgb = PACK_TWO_PIXELS(rgb, PACK_SHORT_565(r, g, b)); |
| 139 | |
| 140 | WRITE_TWO_PIXELS(outptr, rgb); |
| 141 | outptr += 4; |
| 142 | } |
| 143 | |
| 144 | /* If image width is odd, do the last output column separately */ |
| 145 | if (cinfo->output_width & 1) { |
| 146 | cb = GETJSAMPLE(*inptr1); |
| 147 | cr = GETJSAMPLE(*inptr2); |
| 148 | cred = Crrtab[cr]; |
| 149 | cgreen = (int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], SCALEBITS); |
| 150 | cblue = Cbbtab[cb]; |
| 151 | y = GETJSAMPLE(*inptr0); |
| 152 | r = range_limit[DITHER_565_R(y + cred, d0)]; |
| 153 | g = range_limit[DITHER_565_G(y + cgreen, d0)]; |
| 154 | b = range_limit[DITHER_565_B(y + cblue, d0)]; |
| 155 | rgb = PACK_SHORT_565(r, g, b); |
DRC | aa769fe | 2015-10-15 02:25:00 -0500 | [diff] [blame] | 156 | *(INT16*)outptr = (INT16)rgb; |
DRC | 72a3cc0 | 2014-08-30 20:37:50 +0000 | [diff] [blame] | 157 | } |
| 158 | } |
| 159 | |
| 160 | |
| 161 | INLINE |
| 162 | LOCAL(void) |
| 163 | h2v2_merged_upsample_565_internal (j_decompress_ptr cinfo, |
| 164 | JSAMPIMAGE input_buf, |
| 165 | JDIMENSION in_row_group_ctr, |
| 166 | JSAMPARRAY output_buf) |
| 167 | { |
| 168 | my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample; |
| 169 | register int y, cred, cgreen, cblue; |
| 170 | int cb, cr; |
| 171 | register JSAMPROW outptr0, outptr1; |
| 172 | JSAMPROW inptr00, inptr01, inptr1, inptr2; |
| 173 | JDIMENSION col; |
| 174 | /* copy these pointers into registers if possible */ |
| 175 | register JSAMPLE * range_limit = cinfo->sample_range_limit; |
| 176 | int * Crrtab = upsample->Cr_r_tab; |
| 177 | int * Cbbtab = upsample->Cb_b_tab; |
DRC | 1e32fe3 | 2015-10-14 17:32:39 -0500 | [diff] [blame] | 178 | JLONG * Crgtab = upsample->Cr_g_tab; |
| 179 | JLONG * Cbgtab = upsample->Cb_g_tab; |
DRC | 72a3cc0 | 2014-08-30 20:37:50 +0000 | [diff] [blame] | 180 | unsigned int r, g, b; |
DRC | 1e32fe3 | 2015-10-14 17:32:39 -0500 | [diff] [blame] | 181 | JLONG rgb; |
DRC | 72a3cc0 | 2014-08-30 20:37:50 +0000 | [diff] [blame] | 182 | SHIFT_TEMPS |
| 183 | |
| 184 | inptr00 = input_buf[0][in_row_group_ctr * 2]; |
| 185 | inptr01 = input_buf[0][in_row_group_ctr * 2 + 1]; |
| 186 | inptr1 = input_buf[1][in_row_group_ctr]; |
| 187 | inptr2 = input_buf[2][in_row_group_ctr]; |
| 188 | outptr0 = output_buf[0]; |
| 189 | outptr1 = output_buf[1]; |
| 190 | |
| 191 | /* Loop for each group of output pixels */ |
| 192 | for (col = cinfo->output_width >> 1; col > 0; col--) { |
| 193 | /* Do the chroma part of the calculation */ |
| 194 | cb = GETJSAMPLE(*inptr1++); |
| 195 | cr = GETJSAMPLE(*inptr2++); |
| 196 | cred = Crrtab[cr]; |
| 197 | cgreen = (int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], SCALEBITS); |
| 198 | cblue = Cbbtab[cb]; |
| 199 | |
| 200 | /* Fetch 4 Y values and emit 4 pixels */ |
| 201 | y = GETJSAMPLE(*inptr00++); |
| 202 | r = range_limit[y + cred]; |
| 203 | g = range_limit[y + cgreen]; |
| 204 | b = range_limit[y + cblue]; |
| 205 | rgb = PACK_SHORT_565(r, g, b); |
| 206 | |
| 207 | y = GETJSAMPLE(*inptr00++); |
| 208 | r = range_limit[y + cred]; |
| 209 | g = range_limit[y + cgreen]; |
| 210 | b = range_limit[y + cblue]; |
| 211 | rgb = PACK_TWO_PIXELS(rgb, PACK_SHORT_565(r, g, b)); |
| 212 | |
| 213 | WRITE_TWO_PIXELS(outptr0, rgb); |
| 214 | outptr0 += 4; |
| 215 | |
| 216 | y = GETJSAMPLE(*inptr01++); |
| 217 | r = range_limit[y + cred]; |
| 218 | g = range_limit[y + cgreen]; |
| 219 | b = range_limit[y + cblue]; |
| 220 | rgb = PACK_SHORT_565(r, g, b); |
| 221 | |
| 222 | y = GETJSAMPLE(*inptr01++); |
| 223 | r = range_limit[y + cred]; |
| 224 | g = range_limit[y + cgreen]; |
| 225 | b = range_limit[y + cblue]; |
| 226 | rgb = PACK_TWO_PIXELS(rgb, PACK_SHORT_565(r, g, b)); |
| 227 | |
| 228 | WRITE_TWO_PIXELS(outptr1, rgb); |
| 229 | outptr1 += 4; |
| 230 | } |
| 231 | |
| 232 | /* If image width is odd, do the last output column separately */ |
| 233 | if (cinfo->output_width & 1) { |
| 234 | cb = GETJSAMPLE(*inptr1); |
| 235 | cr = GETJSAMPLE(*inptr2); |
| 236 | cred = Crrtab[cr]; |
| 237 | cgreen = (int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], SCALEBITS); |
| 238 | cblue = Cbbtab[cb]; |
| 239 | |
| 240 | y = GETJSAMPLE(*inptr00); |
| 241 | r = range_limit[y + cred]; |
| 242 | g = range_limit[y + cgreen]; |
| 243 | b = range_limit[y + cblue]; |
| 244 | rgb = PACK_SHORT_565(r, g, b); |
DRC | aa769fe | 2015-10-15 02:25:00 -0500 | [diff] [blame] | 245 | *(INT16*)outptr0 = (INT16)rgb; |
DRC | 72a3cc0 | 2014-08-30 20:37:50 +0000 | [diff] [blame] | 246 | |
| 247 | y = GETJSAMPLE(*inptr01); |
| 248 | r = range_limit[y + cred]; |
| 249 | g = range_limit[y + cgreen]; |
| 250 | b = range_limit[y + cblue]; |
| 251 | rgb = PACK_SHORT_565(r, g, b); |
DRC | aa769fe | 2015-10-15 02:25:00 -0500 | [diff] [blame] | 252 | *(INT16*)outptr1 = (INT16)rgb; |
DRC | 72a3cc0 | 2014-08-30 20:37:50 +0000 | [diff] [blame] | 253 | } |
| 254 | } |
| 255 | |
| 256 | |
| 257 | INLINE |
| 258 | LOCAL(void) |
| 259 | h2v2_merged_upsample_565D_internal (j_decompress_ptr cinfo, |
| 260 | JSAMPIMAGE input_buf, |
| 261 | JDIMENSION in_row_group_ctr, |
| 262 | JSAMPARRAY output_buf) |
| 263 | { |
| 264 | my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample; |
| 265 | register int y, cred, cgreen, cblue; |
| 266 | int cb, cr; |
| 267 | register JSAMPROW outptr0, outptr1; |
| 268 | JSAMPROW inptr00, inptr01, inptr1, inptr2; |
| 269 | JDIMENSION col; |
| 270 | /* copy these pointers into registers if possible */ |
| 271 | register JSAMPLE * range_limit = cinfo->sample_range_limit; |
| 272 | int * Crrtab = upsample->Cr_r_tab; |
| 273 | int * Cbbtab = upsample->Cb_b_tab; |
DRC | 1e32fe3 | 2015-10-14 17:32:39 -0500 | [diff] [blame] | 274 | JLONG * Crgtab = upsample->Cr_g_tab; |
| 275 | JLONG * Cbgtab = upsample->Cb_g_tab; |
| 276 | JLONG d0 = dither_matrix[cinfo->output_scanline & DITHER_MASK]; |
| 277 | JLONG d1 = dither_matrix[(cinfo->output_scanline+1) & DITHER_MASK]; |
DRC | 72a3cc0 | 2014-08-30 20:37:50 +0000 | [diff] [blame] | 278 | unsigned int r, g, b; |
DRC | 1e32fe3 | 2015-10-14 17:32:39 -0500 | [diff] [blame] | 279 | JLONG rgb; |
DRC | 72a3cc0 | 2014-08-30 20:37:50 +0000 | [diff] [blame] | 280 | SHIFT_TEMPS |
| 281 | |
| 282 | inptr00 = input_buf[0][in_row_group_ctr*2]; |
| 283 | inptr01 = input_buf[0][in_row_group_ctr*2 + 1]; |
| 284 | inptr1 = input_buf[1][in_row_group_ctr]; |
| 285 | inptr2 = input_buf[2][in_row_group_ctr]; |
| 286 | outptr0 = output_buf[0]; |
| 287 | outptr1 = output_buf[1]; |
| 288 | |
| 289 | /* Loop for each group of output pixels */ |
| 290 | for (col = cinfo->output_width >> 1; col > 0; col--) { |
| 291 | /* Do the chroma part of the calculation */ |
| 292 | cb = GETJSAMPLE(*inptr1++); |
| 293 | cr = GETJSAMPLE(*inptr2++); |
| 294 | cred = Crrtab[cr]; |
| 295 | cgreen = (int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], SCALEBITS); |
| 296 | cblue = Cbbtab[cb]; |
| 297 | |
| 298 | /* Fetch 4 Y values and emit 4 pixels */ |
| 299 | y = GETJSAMPLE(*inptr00++); |
| 300 | r = range_limit[DITHER_565_R(y + cred, d0)]; |
| 301 | g = range_limit[DITHER_565_G(y + cgreen, d0)]; |
| 302 | b = range_limit[DITHER_565_B(y + cblue, d0)]; |
| 303 | d0 = DITHER_ROTATE(d0); |
| 304 | rgb = PACK_SHORT_565(r, g, b); |
| 305 | |
| 306 | y = GETJSAMPLE(*inptr00++); |
| 307 | r = range_limit[DITHER_565_R(y + cred, d1)]; |
| 308 | g = range_limit[DITHER_565_G(y + cgreen, d1)]; |
| 309 | b = range_limit[DITHER_565_B(y + cblue, d1)]; |
| 310 | d1 = DITHER_ROTATE(d1); |
| 311 | rgb = PACK_TWO_PIXELS(rgb, PACK_SHORT_565(r, g, b)); |
| 312 | |
| 313 | WRITE_TWO_PIXELS(outptr0, rgb); |
| 314 | outptr0 += 4; |
| 315 | |
| 316 | y = GETJSAMPLE(*inptr01++); |
| 317 | r = range_limit[DITHER_565_R(y + cred, d0)]; |
| 318 | g = range_limit[DITHER_565_G(y + cgreen, d0)]; |
| 319 | b = range_limit[DITHER_565_B(y + cblue, d0)]; |
| 320 | d0 = DITHER_ROTATE(d0); |
| 321 | rgb = PACK_SHORT_565(r, g, b); |
| 322 | |
| 323 | y = GETJSAMPLE(*inptr01++); |
| 324 | r = range_limit[DITHER_565_R(y + cred, d1)]; |
| 325 | g = range_limit[DITHER_565_G(y + cgreen, d1)]; |
| 326 | b = range_limit[DITHER_565_B(y + cblue, d1)]; |
| 327 | d1 = DITHER_ROTATE(d1); |
| 328 | rgb = PACK_TWO_PIXELS(rgb, PACK_SHORT_565(r, g, b)); |
| 329 | |
| 330 | WRITE_TWO_PIXELS(outptr1, rgb); |
| 331 | outptr1 += 4; |
| 332 | } |
| 333 | |
| 334 | /* If image width is odd, do the last output column separately */ |
| 335 | if (cinfo->output_width & 1) { |
| 336 | cb = GETJSAMPLE(*inptr1); |
| 337 | cr = GETJSAMPLE(*inptr2); |
| 338 | cred = Crrtab[cr]; |
| 339 | cgreen = (int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], SCALEBITS); |
| 340 | cblue = Cbbtab[cb]; |
| 341 | |
| 342 | y = GETJSAMPLE(*inptr00); |
| 343 | r = range_limit[DITHER_565_R(y + cred, d0)]; |
| 344 | g = range_limit[DITHER_565_G(y + cgreen, d0)]; |
| 345 | b = range_limit[DITHER_565_B(y + cblue, d0)]; |
| 346 | rgb = PACK_SHORT_565(r, g, b); |
DRC | aa769fe | 2015-10-15 02:25:00 -0500 | [diff] [blame] | 347 | *(INT16*)outptr0 = (INT16)rgb; |
DRC | 72a3cc0 | 2014-08-30 20:37:50 +0000 | [diff] [blame] | 348 | |
| 349 | y = GETJSAMPLE(*inptr01); |
| 350 | r = range_limit[DITHER_565_R(y + cred, d1)]; |
| 351 | g = range_limit[DITHER_565_G(y + cgreen, d1)]; |
| 352 | b = range_limit[DITHER_565_B(y + cblue, d1)]; |
| 353 | rgb = PACK_SHORT_565(r, g, b); |
DRC | aa769fe | 2015-10-15 02:25:00 -0500 | [diff] [blame] | 354 | *(INT16*)outptr1 = (INT16)rgb; |
DRC | 72a3cc0 | 2014-08-30 20:37:50 +0000 | [diff] [blame] | 355 | } |
| 356 | } |