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1 : | edgomez | 212 | /***************************************************************************** |
2 : | edgomez | 195 | * |
3 : | edgomez | 212 | * XVID MPEG-4 VIDEO CODEC |
4 : | edgomez | 851 | * - 8bit<->16bit transfer - |
5 : | edgomez | 195 | * |
6 : | edgomez | 1382 | * Copyright(C) 2001-2003 Peter Ross <pross@xvid.org> |
7 : | * | ||
8 : | edgomez | 851 | * This program is free software ; you can redistribute it and/or modify |
9 : | * it under the terms of the GNU General Public License as published by | ||
10 : | * the Free Software Foundation ; either version 2 of the License, or | ||
11 : | edgomez | 212 | * (at your option) any later version. |
12 : | edgomez | 195 | * |
13 : | edgomez | 212 | * This program is distributed in the hope that it will be useful, |
14 : | edgomez | 851 | * but WITHOUT ANY WARRANTY ; without even the implied warranty of |
15 : | edgomez | 212 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
16 : | * GNU General Public License for more details. | ||
17 : | edgomez | 195 | * |
18 : | edgomez | 212 | * You should have received a copy of the GNU General Public License |
19 : | edgomez | 851 | * along with this program ; if not, write to the Free Software |
20 : | edgomez | 212 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
21 : | edgomez | 195 | * |
22 : | Isibaar | 1612 | * $Id: mem_transfer.c,v 1.13 2005-04-11 14:33:26 Isibaar Exp $ |
23 : | edgomez | 195 | * |
24 : | edgomez | 212 | ****************************************************************************/ |
25 : | edgomez | 195 | |
26 : | edgomez | 212 | #include "../global.h" |
27 : | #include "mem_transfer.h" | ||
28 : | edgomez | 195 | |
29 : | edgomez | 212 | /* Function pointers - Initialized in the xvid.c module */ |
30 : | |||
31 : | TRANSFER_8TO16COPY_PTR transfer_8to16copy; | ||
32 : | TRANSFER_16TO8COPY_PTR transfer_16to8copy; | ||
33 : | |||
34 : | edgomez | 195 | TRANSFER_8TO16SUB_PTR transfer_8to16sub; |
35 : | edgomez | 851 | TRANSFER_8TO16SUBRO_PTR transfer_8to16subro; |
36 : | edgomez | 195 | TRANSFER_8TO16SUB2_PTR transfer_8to16sub2; |
37 : | syskin | 1583 | TRANSFER_8TO16SUB2RO_PTR transfer_8to16sub2ro; |
38 : | edgomez | 195 | TRANSFER_16TO8ADD_PTR transfer_16to8add; |
39 : | |||
40 : | edgomez | 212 | TRANSFER8X8_COPY_PTR transfer8x8_copy; |
41 : | edgomez | 195 | |
42 : | edgomez | 212 | |
43 : | edgomez | 195 | /***************************************************************************** |
44 : | * | ||
45 : | edgomez | 212 | * All these functions are used to transfer data from a 8 bit data array |
46 : | edgomez | 195 | * to a 16 bit data array. |
47 : | edgomez | 212 | * |
48 : | edgomez | 195 | * This is typically used during motion compensation, that's why some |
49 : | * functions also do the addition/substraction of another buffer during the | ||
50 : | * so called transfer. | ||
51 : | * | ||
52 : | edgomez | 212 | ****************************************************************************/ |
53 : | |||
54 : | /* | ||
55 : | * SRC - the source buffer | ||
56 : | * DST - the destination buffer | ||
57 : | * | ||
58 : | * Then the function does the 8->16 bit transfer and this serie of operations : | ||
59 : | * | ||
60 : | * SRC (8bit) = SRC | ||
61 : | * DST (16bit) = SRC | ||
62 : | edgomez | 195 | */ |
63 : | edgomez | 212 | void |
64 : | transfer_8to16copy_c(int16_t * const dst, | ||
65 : | const uint8_t * const src, | ||
66 : | uint32_t stride) | ||
67 : | { | ||
68 : | uint32_t i, j; | ||
69 : | |||
70 : | for (j = 0; j < 8; j++) { | ||
71 : | for (i = 0; i < 8; i++) { | ||
72 : | edgomez | 195 | dst[j * 8 + i] = (int16_t) src[j * stride + i]; |
73 : | } | ||
74 : | } | ||
75 : | } | ||
76 : | |||
77 : | /* | ||
78 : | * SRC - the source buffer | ||
79 : | * DST - the destination buffer | ||
80 : | * | ||
81 : | * Then the function does the 8->16 bit transfer and this serie of operations : | ||
82 : | * | ||
83 : | * SRC (16bit) = SRC | ||
84 : | * DST (8bit) = max(min(SRC, 255), 0) | ||
85 : | */ | ||
86 : | edgomez | 212 | void |
87 : | transfer_16to8copy_c(uint8_t * const dst, | ||
88 : | const int16_t * const src, | ||
89 : | uint32_t stride) | ||
90 : | { | ||
91 : | uint32_t i, j; | ||
92 : | edgomez | 195 | |
93 : | edgomez | 212 | for (j = 0; j < 8; j++) { |
94 : | for (i = 0; i < 8; i++) { | ||
95 : | edgomez | 195 | int16_t pixel = src[j * 8 + i]; |
96 : | |||
97 : | if (pixel < 0) { | ||
98 : | pixel = 0; | ||
99 : | } else if (pixel > 255) { | ||
100 : | pixel = 255; | ||
101 : | } | ||
102 : | dst[j * stride + i] = (uint8_t) pixel; | ||
103 : | } | ||
104 : | } | ||
105 : | } | ||
106 : | |||
107 : | |||
108 : | |||
109 : | |||
110 : | /* | ||
111 : | * C - the current buffer | ||
112 : | * R - the reference buffer | ||
113 : | * DCT - the dct coefficient buffer | ||
114 : | * | ||
115 : | * Then the function does the 8->16 bit transfer and this serie of operations : | ||
116 : | * | ||
117 : | * R (8bit) = R | ||
118 : | * C (8bit) = R | ||
119 : | * DCT (16bit) = C - R | ||
120 : | edgomez | 212 | */ |
121 : | void | ||
122 : | transfer_8to16sub_c(int16_t * const dct, | ||
123 : | uint8_t * const cur, | ||
124 : | const uint8_t * ref, | ||
125 : | const uint32_t stride) | ||
126 : | { | ||
127 : | uint32_t i, j; | ||
128 : | |||
129 : | for (j = 0; j < 8; j++) { | ||
130 : | edgomez | 195 | for (i = 0; i < 8; i++) { |
131 : | uint8_t c = cur[j * stride + i]; | ||
132 : | uint8_t r = ref[j * stride + i]; | ||
133 : | |||
134 : | cur[j * stride + i] = r; | ||
135 : | dct[j * 8 + i] = (int16_t) c - (int16_t) r; | ||
136 : | } | ||
137 : | } | ||
138 : | } | ||
139 : | |||
140 : | |||
141 : | edgomez | 851 | void |
142 : | transfer_8to16subro_c(int16_t * const dct, | ||
143 : | const uint8_t * const cur, | ||
144 : | const uint8_t * ref, | ||
145 : | const uint32_t stride) | ||
146 : | { | ||
147 : | uint32_t i, j; | ||
148 : | |||
149 : | for (j = 0; j < 8; j++) { | ||
150 : | for (i = 0; i < 8; i++) { | ||
151 : | uint8_t c = cur[j * stride + i]; | ||
152 : | uint8_t r = ref[j * stride + i]; | ||
153 : | dct[j * 8 + i] = (int16_t) c - (int16_t) r; | ||
154 : | } | ||
155 : | } | ||
156 : | } | ||
157 : | |||
158 : | |||
159 : | |||
160 : | edgomez | 195 | /* |
161 : | * C - the current buffer | ||
162 : | * R1 - the 1st reference buffer | ||
163 : | * R2 - the 2nd reference buffer | ||
164 : | * DCT - the dct coefficient buffer | ||
165 : | * | ||
166 : | * Then the function does the 8->16 bit transfer and this serie of operations : | ||
167 : | * | ||
168 : | * R1 (8bit) = R1 | ||
169 : | * R2 (8bit) = R2 | ||
170 : | edgomez | 1382 | * R (temp) = min((R1 + R2)/2, 255) |
171 : | * DCT (16bit)= C - R | ||
172 : | * C (8bit) = R | ||
173 : | edgomez | 212 | */ |
174 : | void | ||
175 : | transfer_8to16sub2_c(int16_t * const dct, | ||
176 : | uint8_t * const cur, | ||
177 : | const uint8_t * ref1, | ||
178 : | const uint8_t * ref2, | ||
179 : | const uint32_t stride) | ||
180 : | { | ||
181 : | uint32_t i, j; | ||
182 : | |||
183 : | edgomez | 195 | for (j = 0; j < 8; j++) { |
184 : | for (i = 0; i < 8; i++) { | ||
185 : | uint8_t c = cur[j * stride + i]; | ||
186 : | int r = (ref1[j * stride + i] + ref2[j * stride + i] + 1) / 2; | ||
187 : | |||
188 : | if (r > 255) { | ||
189 : | r = 255; | ||
190 : | } | ||
191 : | edgomez | 1382 | cur[j * stride + i] = r; |
192 : | edgomez | 195 | dct[j * 8 + i] = (int16_t) c - (int16_t) r; |
193 : | } | ||
194 : | } | ||
195 : | } | ||
196 : | |||
197 : | syskin | 1583 | void |
198 : | transfer_8to16sub2ro_c(int16_t * const dct, | ||
199 : | const uint8_t * const cur, | ||
200 : | const uint8_t * ref1, | ||
201 : | const uint8_t * ref2, | ||
202 : | const uint32_t stride) | ||
203 : | { | ||
204 : | uint32_t i, j; | ||
205 : | edgomez | 195 | |
206 : | syskin | 1583 | for (j = 0; j < 8; j++) { |
207 : | for (i = 0; i < 8; i++) { | ||
208 : | uint8_t c = cur[j * stride + i]; | ||
209 : | int r = (ref1[j * stride + i] + ref2[j * stride + i] + 1) / 2; | ||
210 : | dct[j * 8 + i] = (int16_t) c - (int16_t) r; | ||
211 : | } | ||
212 : | } | ||
213 : | } | ||
214 : | |||
215 : | |||
216 : | edgomez | 195 | /* |
217 : | * SRC - the source buffer | ||
218 : | * DST - the destination buffer | ||
219 : | * | ||
220 : | * Then the function does the 16->8 bit transfer and this serie of operations : | ||
221 : | * | ||
222 : | * SRC (16bit) = SRC | ||
223 : | * DST (8bit) = max(min(DST+SRC, 255), 0) | ||
224 : | */ | ||
225 : | edgomez | 212 | void |
226 : | transfer_16to8add_c(uint8_t * const dst, | ||
227 : | const int16_t * const src, | ||
228 : | uint32_t stride) | ||
229 : | { | ||
230 : | uint32_t i, j; | ||
231 : | |||
232 : | for (j = 0; j < 8; j++) { | ||
233 : | for (i = 0; i < 8; i++) { | ||
234 : | edgomez | 195 | int16_t pixel = (int16_t) dst[j * stride + i] + src[j * 8 + i]; |
235 : | |||
236 : | if (pixel < 0) { | ||
237 : | pixel = 0; | ||
238 : | } else if (pixel > 255) { | ||
239 : | pixel = 255; | ||
240 : | } | ||
241 : | dst[j * stride + i] = (uint8_t) pixel; | ||
242 : | } | ||
243 : | } | ||
244 : | } | ||
245 : | |||
246 : | /* | ||
247 : | * SRC - the source buffer | ||
248 : | * DST - the destination buffer | ||
249 : | * | ||
250 : | * Then the function does the 8->8 bit transfer and this serie of operations : | ||
251 : | * | ||
252 : | * SRC (8bit) = SRC | ||
253 : | * DST (8bit) = SRC | ||
254 : | */ | ||
255 : | edgomez | 212 | void |
256 : | transfer8x8_copy_c(uint8_t * const dst, | ||
257 : | const uint8_t * const src, | ||
258 : | const uint32_t stride) | ||
259 : | { | ||
260 : | Isibaar | 1612 | uint32_t j, i; |
261 : | edgomez | 195 | |
262 : | Isibaar | 1612 | for (j = 0; j < 8; ++j) { |
263 : | uint8_t *d = dst + j*stride; | ||
264 : | const uint8_t *s = src + j*stride; | ||
265 : | |||
266 : | for (i = 0; i < 8; ++i) | ||
267 : | { | ||
268 : | *d++ = *s++; | ||
269 : | } | ||
270 : | edgomez | 195 | } |
271 : | } |
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