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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 | 851 | * This program is free software ; you can redistribute it and/or modify |
7 : | * it under the terms of the GNU General Public License as published by | ||
8 : | * the Free Software Foundation ; either version 2 of the License, or | ||
9 : | edgomez | 212 | * (at your option) any later version. |
10 : | edgomez | 195 | * |
11 : | edgomez | 212 | * This program is distributed in the hope that it will be useful, |
12 : | edgomez | 851 | * but WITHOUT ANY WARRANTY ; without even the implied warranty of |
13 : | edgomez | 212 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 : | * GNU General Public License for more details. | ||
15 : | edgomez | 195 | * |
16 : | edgomez | 212 | * You should have received a copy of the GNU General Public License |
17 : | edgomez | 851 | * along with this program ; if not, write to the Free Software |
18 : | edgomez | 212 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
19 : | edgomez | 195 | * |
20 : | edgomez | 851 | ****************************************************************************/ |
21 : | /***************************************************************************** | ||
22 : | edgomez | 195 | * |
23 : | edgomez | 851 | * History |
24 : | edgomez | 654 | * |
25 : | edgomez | 851 | * - 14.06.2002 Changed legal header with the new FSF address |
26 : | * - 14.04.2002 added transfer_8to16sub2 | ||
27 : | * - 07.01.2002 merge functions from compensate; rename functions | ||
28 : | * - 22.12.2001 transfer_8to8add16 limit fix | ||
29 : | * - 07.11.2001 initial version; (c)2001 peter ross <pross@cs.rmit.edu.au> | ||
30 : | edgomez | 654 | * |
31 : | edgomez | 1053 | * $Id: mem_transfer.c,v 1.9.2.1 2003-06-09 01:25:10 edgomez Exp $ |
32 : | edgomez | 654 | * |
33 : | edgomez | 212 | ****************************************************************************/ |
34 : | edgomez | 195 | |
35 : | edgomez | 212 | #include "../global.h" |
36 : | #include "mem_transfer.h" | ||
37 : | edgomez | 195 | |
38 : | edgomez | 212 | /* Function pointers - Initialized in the xvid.c module */ |
39 : | |||
40 : | TRANSFER_8TO16COPY_PTR transfer_8to16copy; | ||
41 : | TRANSFER_16TO8COPY_PTR transfer_16to8copy; | ||
42 : | |||
43 : | edgomez | 195 | TRANSFER_8TO16SUB_PTR transfer_8to16sub; |
44 : | edgomez | 851 | TRANSFER_8TO16SUBRO_PTR transfer_8to16subro; |
45 : | edgomez | 195 | TRANSFER_8TO16SUB2_PTR transfer_8to16sub2; |
46 : | TRANSFER_16TO8ADD_PTR transfer_16to8add; | ||
47 : | |||
48 : | edgomez | 212 | TRANSFER8X8_COPY_PTR transfer8x8_copy; |
49 : | edgomez | 195 | |
50 : | edgomez | 212 | |
51 : | edgomez | 195 | /***************************************************************************** |
52 : | * | ||
53 : | edgomez | 212 | * All these functions are used to transfer data from a 8 bit data array |
54 : | edgomez | 195 | * to a 16 bit data array. |
55 : | edgomez | 212 | * |
56 : | edgomez | 195 | * This is typically used during motion compensation, that's why some |
57 : | * functions also do the addition/substraction of another buffer during the | ||
58 : | * so called transfer. | ||
59 : | * | ||
60 : | edgomez | 212 | ****************************************************************************/ |
61 : | |||
62 : | /* | ||
63 : | * SRC - the source buffer | ||
64 : | * DST - the destination buffer | ||
65 : | * | ||
66 : | * Then the function does the 8->16 bit transfer and this serie of operations : | ||
67 : | * | ||
68 : | * SRC (8bit) = SRC | ||
69 : | * DST (16bit) = SRC | ||
70 : | edgomez | 195 | */ |
71 : | edgomez | 212 | void |
72 : | transfer_8to16copy_c(int16_t * const dst, | ||
73 : | const uint8_t * const src, | ||
74 : | uint32_t stride) | ||
75 : | { | ||
76 : | uint32_t i, j; | ||
77 : | |||
78 : | for (j = 0; j < 8; j++) { | ||
79 : | for (i = 0; i < 8; i++) { | ||
80 : | edgomez | 195 | dst[j * 8 + i] = (int16_t) src[j * stride + i]; |
81 : | } | ||
82 : | } | ||
83 : | } | ||
84 : | |||
85 : | /* | ||
86 : | * SRC - the source buffer | ||
87 : | * DST - the destination buffer | ||
88 : | * | ||
89 : | * Then the function does the 8->16 bit transfer and this serie of operations : | ||
90 : | * | ||
91 : | * SRC (16bit) = SRC | ||
92 : | * DST (8bit) = max(min(SRC, 255), 0) | ||
93 : | */ | ||
94 : | edgomez | 212 | void |
95 : | transfer_16to8copy_c(uint8_t * const dst, | ||
96 : | const int16_t * const src, | ||
97 : | uint32_t stride) | ||
98 : | { | ||
99 : | uint32_t i, j; | ||
100 : | edgomez | 195 | |
101 : | edgomez | 212 | for (j = 0; j < 8; j++) { |
102 : | for (i = 0; i < 8; i++) { | ||
103 : | edgomez | 195 | int16_t pixel = src[j * 8 + i]; |
104 : | |||
105 : | if (pixel < 0) { | ||
106 : | pixel = 0; | ||
107 : | } else if (pixel > 255) { | ||
108 : | pixel = 255; | ||
109 : | } | ||
110 : | dst[j * stride + i] = (uint8_t) pixel; | ||
111 : | } | ||
112 : | } | ||
113 : | } | ||
114 : | |||
115 : | |||
116 : | |||
117 : | |||
118 : | /* | ||
119 : | * C - the current buffer | ||
120 : | * R - the reference buffer | ||
121 : | * DCT - the dct coefficient buffer | ||
122 : | * | ||
123 : | * Then the function does the 8->16 bit transfer and this serie of operations : | ||
124 : | * | ||
125 : | * R (8bit) = R | ||
126 : | * C (8bit) = R | ||
127 : | * DCT (16bit) = C - R | ||
128 : | edgomez | 212 | */ |
129 : | void | ||
130 : | transfer_8to16sub_c(int16_t * const dct, | ||
131 : | uint8_t * const cur, | ||
132 : | const uint8_t * ref, | ||
133 : | const uint32_t stride) | ||
134 : | { | ||
135 : | uint32_t i, j; | ||
136 : | |||
137 : | for (j = 0; j < 8; j++) { | ||
138 : | edgomez | 195 | for (i = 0; i < 8; i++) { |
139 : | uint8_t c = cur[j * stride + i]; | ||
140 : | uint8_t r = ref[j * stride + i]; | ||
141 : | |||
142 : | cur[j * stride + i] = r; | ||
143 : | dct[j * 8 + i] = (int16_t) c - (int16_t) r; | ||
144 : | } | ||
145 : | } | ||
146 : | } | ||
147 : | |||
148 : | |||
149 : | edgomez | 851 | void |
150 : | transfer_8to16subro_c(int16_t * const dct, | ||
151 : | const uint8_t * const cur, | ||
152 : | const uint8_t * ref, | ||
153 : | const uint32_t stride) | ||
154 : | { | ||
155 : | uint32_t i, j; | ||
156 : | |||
157 : | for (j = 0; j < 8; j++) { | ||
158 : | for (i = 0; i < 8; i++) { | ||
159 : | uint8_t c = cur[j * stride + i]; | ||
160 : | uint8_t r = ref[j * stride + i]; | ||
161 : | dct[j * 8 + i] = (int16_t) c - (int16_t) r; | ||
162 : | } | ||
163 : | } | ||
164 : | } | ||
165 : | |||
166 : | |||
167 : | |||
168 : | edgomez | 195 | /* |
169 : | * C - the current buffer | ||
170 : | * R1 - the 1st reference buffer | ||
171 : | * R2 - the 2nd reference buffer | ||
172 : | * DCT - the dct coefficient buffer | ||
173 : | * | ||
174 : | * Then the function does the 8->16 bit transfer and this serie of operations : | ||
175 : | * | ||
176 : | * R1 (8bit) = R1 | ||
177 : | * R2 (8bit) = R2 | ||
178 : | edgomez | 212 | * C (8bit) = C |
179 : | * DCT (16bit)= C - min((R1 + R2)/2, 255) | ||
180 : | */ | ||
181 : | void | ||
182 : | transfer_8to16sub2_c(int16_t * const dct, | ||
183 : | uint8_t * const cur, | ||
184 : | const uint8_t * ref1, | ||
185 : | const uint8_t * ref2, | ||
186 : | const uint32_t stride) | ||
187 : | { | ||
188 : | uint32_t i, j; | ||
189 : | |||
190 : | edgomez | 195 | for (j = 0; j < 8; j++) { |
191 : | for (i = 0; i < 8; i++) { | ||
192 : | uint8_t c = cur[j * stride + i]; | ||
193 : | int r = (ref1[j * stride + i] + ref2[j * stride + i] + 1) / 2; | ||
194 : | |||
195 : | if (r > 255) { | ||
196 : | r = 255; | ||
197 : | } | ||
198 : | edgomez | 1053 | /* cur[j * stride + i] = r; */ |
199 : | edgomez | 195 | dct[j * 8 + i] = (int16_t) c - (int16_t) r; |
200 : | } | ||
201 : | } | ||
202 : | } | ||
203 : | |||
204 : | |||
205 : | /* | ||
206 : | * SRC - the source buffer | ||
207 : | * DST - the destination buffer | ||
208 : | * | ||
209 : | * Then the function does the 16->8 bit transfer and this serie of operations : | ||
210 : | * | ||
211 : | * SRC (16bit) = SRC | ||
212 : | * DST (8bit) = max(min(DST+SRC, 255), 0) | ||
213 : | */ | ||
214 : | edgomez | 212 | void |
215 : | transfer_16to8add_c(uint8_t * const dst, | ||
216 : | const int16_t * const src, | ||
217 : | uint32_t stride) | ||
218 : | { | ||
219 : | uint32_t i, j; | ||
220 : | |||
221 : | for (j = 0; j < 8; j++) { | ||
222 : | for (i = 0; i < 8; i++) { | ||
223 : | edgomez | 195 | int16_t pixel = (int16_t) dst[j * stride + i] + src[j * 8 + i]; |
224 : | |||
225 : | if (pixel < 0) { | ||
226 : | pixel = 0; | ||
227 : | } else if (pixel > 255) { | ||
228 : | pixel = 255; | ||
229 : | } | ||
230 : | dst[j * stride + i] = (uint8_t) pixel; | ||
231 : | } | ||
232 : | } | ||
233 : | } | ||
234 : | |||
235 : | /* | ||
236 : | * SRC - the source buffer | ||
237 : | * DST - the destination buffer | ||
238 : | * | ||
239 : | * Then the function does the 8->8 bit transfer and this serie of operations : | ||
240 : | * | ||
241 : | * SRC (8bit) = SRC | ||
242 : | * DST (8bit) = SRC | ||
243 : | */ | ||
244 : | edgomez | 212 | void |
245 : | transfer8x8_copy_c(uint8_t * const dst, | ||
246 : | const uint8_t * const src, | ||
247 : | const uint32_t stride) | ||
248 : | { | ||
249 : | uint32_t i, j; | ||
250 : | edgomez | 195 | |
251 : | edgomez | 212 | for (j = 0; j < 8; j++) { |
252 : | for (i = 0; i < 8; i++) { | ||
253 : | edgomez | 195 | dst[j * stride + i] = src[j * stride + i]; |
254 : | } | ||
255 : | } | ||
256 : | } |
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