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Original Path: trunk/xvidcore/src/utils/mem_transfer.c
| 1 : | edgomez | 212 | /***************************************************************************** |
| 2 : | edgomez | 195 | * |
| 3 : | edgomez | 212 | * XVID MPEG-4 VIDEO CODEC |
| 4 : | edgomez | 416 | * - 8bit<->16bit transfer - |
| 5 : | edgomez | 195 | * |
| 6 : | suxen_drol | 499 | * Copyright(C) 2001-2002 Peter Ross <pross@xvid.org> |
| 7 : | edgomez | 416 | * |
| 8 : | edgomez | 654 | * This file is part of XviD, a free MPEG-4 video encoder/decoder |
| 9 : | edgomez | 416 | * |
| 10 : | edgomez | 654 | * XviD is free software; you can redistribute it and/or modify it |
| 11 : | * under the terms of the GNU General Public License as published by | ||
| 12 : | edgomez | 416 | * the Free Software Foundation; either version 2 of the License, or |
| 13 : | edgomez | 212 | * (at your option) any later version. |
| 14 : | edgomez | 195 | * |
| 15 : | edgomez | 212 | * This program is distributed in the hope that it will be useful, |
| 16 : | edgomez | 416 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 : | edgomez | 212 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 : | * GNU General Public License for more details. | ||
| 19 : | edgomez | 195 | * |
| 20 : | edgomez | 212 | * You should have received a copy of the GNU General Public License |
| 21 : | edgomez | 416 | * along with this program; if not, write to the Free Software |
| 22 : | edgomez | 212 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 23 : | edgomez | 195 | * |
| 24 : | edgomez | 654 | * Under section 8 of the GNU General Public License, the copyright |
| 25 : | * holders of XVID explicitly forbid distribution in the following | ||
| 26 : | * countries: | ||
| 27 : | edgomez | 195 | * |
| 28 : | edgomez | 654 | * - Japan |
| 29 : | * - United States of America | ||
| 30 : | * | ||
| 31 : | * Linking XviD statically or dynamically with other modules is making a | ||
| 32 : | * combined work based on XviD. Thus, the terms and conditions of the | ||
| 33 : | * GNU General Public License cover the whole combination. | ||
| 34 : | * | ||
| 35 : | * As a special exception, the copyright holders of XviD give you | ||
| 36 : | * permission to link XviD with independent modules that communicate with | ||
| 37 : | * XviD solely through the VFW1.1 and DShow interfaces, regardless of the | ||
| 38 : | * license terms of these independent modules, and to copy and distribute | ||
| 39 : | * the resulting combined work under terms of your choice, provided that | ||
| 40 : | * every copy of the combined work is accompanied by a complete copy of | ||
| 41 : | * the source code of XviD (the version of XviD used to produce the | ||
| 42 : | * combined work), being distributed under the terms of the GNU General | ||
| 43 : | * Public License plus this exception. An independent module is a module | ||
| 44 : | * which is not derived from or based on XviD. | ||
| 45 : | * | ||
| 46 : | * Note that people who make modified versions of XviD are not obligated | ||
| 47 : | * to grant this special exception for their modified versions; it is | ||
| 48 : | * their choice whether to do so. The GNU General Public License gives | ||
| 49 : | * permission to release a modified version without this exception; this | ||
| 50 : | * exception also makes it possible to release a modified version which | ||
| 51 : | * carries forward this exception. | ||
| 52 : | * | ||
| 53 : | edgomez | 677 | * $Id: mem_transfer.c,v 1.8 2002-11-26 23:44:11 edgomez Exp $ |
| 54 : | edgomez | 654 | * |
| 55 : | edgomez | 212 | ****************************************************************************/ |
| 56 : | edgomez | 195 | |
| 57 : | edgomez | 212 | #include "../global.h" |
| 58 : | #include "mem_transfer.h" | ||
| 59 : | edgomez | 195 | |
| 60 : | edgomez | 212 | /* Function pointers - Initialized in the xvid.c module */ |
| 61 : | |||
| 62 : | TRANSFER_8TO16COPY_PTR transfer_8to16copy; | ||
| 63 : | TRANSFER_16TO8COPY_PTR transfer_16to8copy; | ||
| 64 : | |||
| 65 : | edgomez | 195 | TRANSFER_8TO16SUB_PTR transfer_8to16sub; |
| 66 : | TRANSFER_8TO16SUB2_PTR transfer_8to16sub2; | ||
| 67 : | TRANSFER_16TO8ADD_PTR transfer_16to8add; | ||
| 68 : | |||
| 69 : | edgomez | 212 | TRANSFER8X8_COPY_PTR transfer8x8_copy; |
| 70 : | edgomez | 195 | |
| 71 : | edgomez | 212 | |
| 72 : | edgomez | 195 | /***************************************************************************** |
| 73 : | * | ||
| 74 : | edgomez | 212 | * All these functions are used to transfer data from a 8 bit data array |
| 75 : | edgomez | 195 | * to a 16 bit data array. |
| 76 : | edgomez | 212 | * |
| 77 : | edgomez | 195 | * This is typically used during motion compensation, that's why some |
| 78 : | * functions also do the addition/substraction of another buffer during the | ||
| 79 : | * so called transfer. | ||
| 80 : | * | ||
| 81 : | edgomez | 212 | ****************************************************************************/ |
| 82 : | |||
| 83 : | /* | ||
| 84 : | * SRC - the source buffer | ||
| 85 : | * DST - the destination buffer | ||
| 86 : | * | ||
| 87 : | * Then the function does the 8->16 bit transfer and this serie of operations : | ||
| 88 : | * | ||
| 89 : | * SRC (8bit) = SRC | ||
| 90 : | * DST (16bit) = SRC | ||
| 91 : | edgomez | 195 | */ |
| 92 : | edgomez | 212 | void |
| 93 : | transfer_8to16copy_c(int16_t * const dst, | ||
| 94 : | const uint8_t * const src, | ||
| 95 : | uint32_t stride) | ||
| 96 : | { | ||
| 97 : | uint32_t i, j; | ||
| 98 : | |||
| 99 : | for (j = 0; j < 8; j++) { | ||
| 100 : | for (i = 0; i < 8; i++) { | ||
| 101 : | edgomez | 195 | dst[j * 8 + i] = (int16_t) src[j * stride + i]; |
| 102 : | } | ||
| 103 : | } | ||
| 104 : | } | ||
| 105 : | |||
| 106 : | /* | ||
| 107 : | * SRC - the source buffer | ||
| 108 : | * DST - the destination buffer | ||
| 109 : | * | ||
| 110 : | * Then the function does the 8->16 bit transfer and this serie of operations : | ||
| 111 : | * | ||
| 112 : | * SRC (16bit) = SRC | ||
| 113 : | * DST (8bit) = max(min(SRC, 255), 0) | ||
| 114 : | */ | ||
| 115 : | edgomez | 212 | void |
| 116 : | transfer_16to8copy_c(uint8_t * const dst, | ||
| 117 : | const int16_t * const src, | ||
| 118 : | uint32_t stride) | ||
| 119 : | { | ||
| 120 : | uint32_t i, j; | ||
| 121 : | edgomez | 195 | |
| 122 : | edgomez | 212 | for (j = 0; j < 8; j++) { |
| 123 : | for (i = 0; i < 8; i++) { | ||
| 124 : | edgomez | 195 | int16_t pixel = src[j * 8 + i]; |
| 125 : | |||
| 126 : | if (pixel < 0) { | ||
| 127 : | pixel = 0; | ||
| 128 : | } else if (pixel > 255) { | ||
| 129 : | pixel = 255; | ||
| 130 : | } | ||
| 131 : | dst[j * stride + i] = (uint8_t) pixel; | ||
| 132 : | } | ||
| 133 : | } | ||
| 134 : | } | ||
| 135 : | |||
| 136 : | |||
| 137 : | |||
| 138 : | |||
| 139 : | /* | ||
| 140 : | * C - the current buffer | ||
| 141 : | * R - the reference buffer | ||
| 142 : | * DCT - the dct coefficient buffer | ||
| 143 : | * | ||
| 144 : | * Then the function does the 8->16 bit transfer and this serie of operations : | ||
| 145 : | * | ||
| 146 : | * R (8bit) = R | ||
| 147 : | * C (8bit) = R | ||
| 148 : | * DCT (16bit) = C - R | ||
| 149 : | edgomez | 212 | */ |
| 150 : | void | ||
| 151 : | transfer_8to16sub_c(int16_t * const dct, | ||
| 152 : | uint8_t * const cur, | ||
| 153 : | const uint8_t * ref, | ||
| 154 : | const uint32_t stride) | ||
| 155 : | { | ||
| 156 : | uint32_t i, j; | ||
| 157 : | |||
| 158 : | for (j = 0; j < 8; j++) { | ||
| 159 : | edgomez | 195 | for (i = 0; i < 8; i++) { |
| 160 : | uint8_t c = cur[j * stride + i]; | ||
| 161 : | uint8_t r = ref[j * stride + i]; | ||
| 162 : | |||
| 163 : | cur[j * stride + i] = r; | ||
| 164 : | dct[j * 8 + i] = (int16_t) c - (int16_t) r; | ||
| 165 : | } | ||
| 166 : | } | ||
| 167 : | } | ||
| 168 : | |||
| 169 : | |||
| 170 : | /* | ||
| 171 : | * C - the current buffer | ||
| 172 : | * R1 - the 1st reference buffer | ||
| 173 : | * R2 - the 2nd reference buffer | ||
| 174 : | * DCT - the dct coefficient buffer | ||
| 175 : | * | ||
| 176 : | * Then the function does the 8->16 bit transfer and this serie of operations : | ||
| 177 : | * | ||
| 178 : | * R1 (8bit) = R1 | ||
| 179 : | * R2 (8bit) = R2 | ||
| 180 : | edgomez | 212 | * C (8bit) = C |
| 181 : | * DCT (16bit)= C - min((R1 + R2)/2, 255) | ||
| 182 : | */ | ||
| 183 : | void | ||
| 184 : | transfer_8to16sub2_c(int16_t * const dct, | ||
| 185 : | uint8_t * const cur, | ||
| 186 : | const uint8_t * ref1, | ||
| 187 : | const uint8_t * ref2, | ||
| 188 : | const uint32_t stride) | ||
| 189 : | { | ||
| 190 : | uint32_t i, j; | ||
| 191 : | |||
| 192 : | edgomez | 195 | for (j = 0; j < 8; j++) { |
| 193 : | for (i = 0; i < 8; i++) { | ||
| 194 : | uint8_t c = cur[j * stride + i]; | ||
| 195 : | int r = (ref1[j * stride + i] + ref2[j * stride + i] + 1) / 2; | ||
| 196 : | |||
| 197 : | if (r > 255) { | ||
| 198 : | r = 255; | ||
| 199 : | } | ||
| 200 : | edgomez | 677 | /*cur[j * stride + i] = r; */ |
| 201 : | edgomez | 195 | dct[j * 8 + i] = (int16_t) c - (int16_t) r; |
| 202 : | } | ||
| 203 : | } | ||
| 204 : | } | ||
| 205 : | |||
| 206 : | |||
| 207 : | /* | ||
| 208 : | * SRC - the source buffer | ||
| 209 : | * DST - the destination buffer | ||
| 210 : | * | ||
| 211 : | * Then the function does the 16->8 bit transfer and this serie of operations : | ||
| 212 : | * | ||
| 213 : | * SRC (16bit) = SRC | ||
| 214 : | * DST (8bit) = max(min(DST+SRC, 255), 0) | ||
| 215 : | */ | ||
| 216 : | edgomez | 212 | void |
| 217 : | transfer_16to8add_c(uint8_t * const dst, | ||
| 218 : | const int16_t * const src, | ||
| 219 : | uint32_t stride) | ||
| 220 : | { | ||
| 221 : | uint32_t i, j; | ||
| 222 : | |||
| 223 : | for (j = 0; j < 8; j++) { | ||
| 224 : | for (i = 0; i < 8; i++) { | ||
| 225 : | edgomez | 195 | int16_t pixel = (int16_t) dst[j * stride + i] + src[j * 8 + i]; |
| 226 : | |||
| 227 : | if (pixel < 0) { | ||
| 228 : | pixel = 0; | ||
| 229 : | } else if (pixel > 255) { | ||
| 230 : | pixel = 255; | ||
| 231 : | } | ||
| 232 : | dst[j * stride + i] = (uint8_t) pixel; | ||
| 233 : | } | ||
| 234 : | } | ||
| 235 : | } | ||
| 236 : | |||
| 237 : | /* | ||
| 238 : | * SRC - the source buffer | ||
| 239 : | * DST - the destination buffer | ||
| 240 : | * | ||
| 241 : | * Then the function does the 8->8 bit transfer and this serie of operations : | ||
| 242 : | * | ||
| 243 : | * SRC (8bit) = SRC | ||
| 244 : | * DST (8bit) = SRC | ||
| 245 : | */ | ||
| 246 : | edgomez | 212 | void |
| 247 : | transfer8x8_copy_c(uint8_t * const dst, | ||
| 248 : | const uint8_t * const src, | ||
| 249 : | const uint32_t stride) | ||
| 250 : | { | ||
| 251 : | uint32_t i, j; | ||
| 252 : | edgomez | 195 | |
| 253 : | edgomez | 212 | for (j = 0; j < 8; j++) { |
| 254 : | for (i = 0; i < 8; i++) { | ||
| 255 : | edgomez | 195 | dst[j * stride + i] = src[j * stride + i]; |
| 256 : | } | ||
| 257 : | } | ||
| 258 : | } |
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