media/libvpx/vp8/common/sad_c.c@ac0c01689b40
media/libvpx/vp8/common/sad_c.c
Thu, 15 Jan 2015 15:59:08 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 15 Jan 2015 15:59:08 +0100
- branch
- TOR_BUG_9701
- changeset 10
- ac0c01689b40
- permissions
- -rw-r--r--
Implement a real Private Browsing Mode condition by changing the API/ABI;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
1 /*
2 * Copyright (c) 2010 The WebM project authors. All Rights Reserved.
3 *
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
9 */
12 #include <limits.h>
13 #include <stdlib.h>
14 #include "vpx_config.h"
15 #include "vpx/vpx_integer.h"
17 static unsigned int sad_mx_n_c(const unsigned char *src_ptr, int src_stride,
18 const unsigned char *ref_ptr, int ref_stride,
19 unsigned int max_sad, int m, int n)
20 {
21 int r, c;
22 unsigned int sad = 0;
24 for (r = 0; r < n; r++)
25 {
26 for (c = 0; c < m; c++)
27 {
28 sad += abs(src_ptr[c] - ref_ptr[c]);
29 }
31 if (sad > max_sad)
32 break;
34 src_ptr += src_stride;
35 ref_ptr += ref_stride;
36 }
38 return sad;
39 }
41 /* max_sad is provided as an optional optimization point. Alternative
42 * implementations of these functions are not required to check it.
43 */
45 unsigned int vp8_sad16x16_c(const unsigned char *src_ptr, int src_stride,
46 const unsigned char *ref_ptr, int ref_stride,
47 unsigned int max_sad)
48 {
49 return sad_mx_n_c(src_ptr, src_stride, ref_ptr, ref_stride, max_sad, 16, 16);
50 }
52 unsigned int vp8_sad8x8_c(const unsigned char *src_ptr, int src_stride,
53 const unsigned char *ref_ptr, int ref_stride,
54 unsigned int max_sad)
55 {
56 return sad_mx_n_c(src_ptr, src_stride, ref_ptr, ref_stride, max_sad, 8, 8);
57 }
59 unsigned int vp8_sad16x8_c(const unsigned char *src_ptr, int src_stride,
60 const unsigned char *ref_ptr, int ref_stride,
61 unsigned int max_sad)
62 {
63 return sad_mx_n_c(src_ptr, src_stride, ref_ptr, ref_stride, max_sad, 16, 8);
65 }
67 unsigned int vp8_sad8x16_c(const unsigned char *src_ptr, int src_stride,
68 const unsigned char *ref_ptr, int ref_stride,
69 unsigned int max_sad)
70 {
71 return sad_mx_n_c(src_ptr, src_stride, ref_ptr, ref_stride, max_sad, 8, 16);
72 }
74 unsigned int vp8_sad4x4_c(const unsigned char *src_ptr, int src_stride,
75 const unsigned char *ref_ptr, int ref_stride,
76 unsigned int max_sad)
77 {
78 return sad_mx_n_c(src_ptr, src_stride, ref_ptr, ref_stride, max_sad, 4, 4);
79 }
81 void vp8_sad16x16x3_c(const unsigned char *src_ptr, int src_stride,
82 const unsigned char *ref_ptr, int ref_stride,
83 unsigned int *sad_array)
84 {
85 sad_array[0] = vp8_sad16x16_c(src_ptr, src_stride, ref_ptr + 0, ref_stride, UINT_MAX);
86 sad_array[1] = vp8_sad16x16_c(src_ptr, src_stride, ref_ptr + 1, ref_stride, UINT_MAX);
87 sad_array[2] = vp8_sad16x16_c(src_ptr, src_stride, ref_ptr + 2, ref_stride, UINT_MAX);
88 }
90 void vp8_sad16x16x8_c(const unsigned char *src_ptr, int src_stride,
91 const unsigned char *ref_ptr, int ref_stride,
92 unsigned short *sad_array)
93 {
94 sad_array[0] = (unsigned short)vp8_sad16x16_c(src_ptr, src_stride, ref_ptr + 0, ref_stride, UINT_MAX);
95 sad_array[1] = (unsigned short)vp8_sad16x16_c(src_ptr, src_stride, ref_ptr + 1, ref_stride, UINT_MAX);
96 sad_array[2] = (unsigned short)vp8_sad16x16_c(src_ptr, src_stride, ref_ptr + 2, ref_stride, UINT_MAX);
97 sad_array[3] = (unsigned short)vp8_sad16x16_c(src_ptr, src_stride, ref_ptr + 3, ref_stride, UINT_MAX);
98 sad_array[4] = (unsigned short)vp8_sad16x16_c(src_ptr, src_stride, ref_ptr + 4, ref_stride, UINT_MAX);
99 sad_array[5] = (unsigned short)vp8_sad16x16_c(src_ptr, src_stride, ref_ptr + 5, ref_stride, UINT_MAX);
100 sad_array[6] = (unsigned short)vp8_sad16x16_c(src_ptr, src_stride, ref_ptr + 6, ref_stride, UINT_MAX);
101 sad_array[7] = (unsigned short)vp8_sad16x16_c(src_ptr, src_stride, ref_ptr + 7, ref_stride, UINT_MAX);
102 }
104 void vp8_sad16x8x3_c(const unsigned char *src_ptr, int src_stride,
105 const unsigned char *ref_ptr, int ref_stride,
106 unsigned int *sad_array)
107 {
108 sad_array[0] = vp8_sad16x8_c(src_ptr, src_stride, ref_ptr + 0, ref_stride, UINT_MAX);
109 sad_array[1] = vp8_sad16x8_c(src_ptr, src_stride, ref_ptr + 1, ref_stride, UINT_MAX);
110 sad_array[2] = vp8_sad16x8_c(src_ptr, src_stride, ref_ptr + 2, ref_stride, UINT_MAX);
111 }
113 void vp8_sad16x8x8_c(const unsigned char *src_ptr, int src_stride,
114 const unsigned char *ref_ptr, int ref_stride,
115 unsigned short *sad_array)
116 {
117 sad_array[0] = (unsigned short)vp8_sad16x8_c(src_ptr, src_stride, ref_ptr + 0, ref_stride, UINT_MAX);
118 sad_array[1] = (unsigned short)vp8_sad16x8_c(src_ptr, src_stride, ref_ptr + 1, ref_stride, UINT_MAX);
119 sad_array[2] = (unsigned short)vp8_sad16x8_c(src_ptr, src_stride, ref_ptr + 2, ref_stride, UINT_MAX);
120 sad_array[3] = (unsigned short)vp8_sad16x8_c(src_ptr, src_stride, ref_ptr + 3, ref_stride, UINT_MAX);
121 sad_array[4] = (unsigned short)vp8_sad16x8_c(src_ptr, src_stride, ref_ptr + 4, ref_stride, UINT_MAX);
122 sad_array[5] = (unsigned short)vp8_sad16x8_c(src_ptr, src_stride, ref_ptr + 5, ref_stride, UINT_MAX);
123 sad_array[6] = (unsigned short)vp8_sad16x8_c(src_ptr, src_stride, ref_ptr + 6, ref_stride, UINT_MAX);
124 sad_array[7] = (unsigned short)vp8_sad16x8_c(src_ptr, src_stride, ref_ptr + 7, ref_stride, UINT_MAX);
125 }
127 void vp8_sad8x8x3_c(const unsigned char *src_ptr, int src_stride,
128 const unsigned char *ref_ptr, int ref_stride,
129 unsigned int *sad_array)
130 {
131 sad_array[0] = vp8_sad8x8_c(src_ptr, src_stride, ref_ptr + 0, ref_stride, UINT_MAX);
132 sad_array[1] = vp8_sad8x8_c(src_ptr, src_stride, ref_ptr + 1, ref_stride, UINT_MAX);
133 sad_array[2] = vp8_sad8x8_c(src_ptr, src_stride, ref_ptr + 2, ref_stride, UINT_MAX);
134 }
136 void vp8_sad8x8x8_c(const unsigned char *src_ptr, int src_stride,
137 const unsigned char *ref_ptr, int ref_stride,
138 unsigned short *sad_array)
139 {
140 sad_array[0] = (unsigned short)vp8_sad8x8_c(src_ptr, src_stride, ref_ptr + 0, ref_stride, UINT_MAX);
141 sad_array[1] = (unsigned short)vp8_sad8x8_c(src_ptr, src_stride, ref_ptr + 1, ref_stride, UINT_MAX);
142 sad_array[2] = (unsigned short)vp8_sad8x8_c(src_ptr, src_stride, ref_ptr + 2, ref_stride, UINT_MAX);
143 sad_array[3] = (unsigned short)vp8_sad8x8_c(src_ptr, src_stride, ref_ptr + 3, ref_stride, UINT_MAX);
144 sad_array[4] = (unsigned short)vp8_sad8x8_c(src_ptr, src_stride, ref_ptr + 4, ref_stride, UINT_MAX);
145 sad_array[5] = (unsigned short)vp8_sad8x8_c(src_ptr, src_stride, ref_ptr + 5, ref_stride, UINT_MAX);
146 sad_array[6] = (unsigned short)vp8_sad8x8_c(src_ptr, src_stride, ref_ptr + 6, ref_stride, UINT_MAX);
147 sad_array[7] = (unsigned short)vp8_sad8x8_c(src_ptr, src_stride, ref_ptr + 7, ref_stride, UINT_MAX);
148 }
150 void vp8_sad8x16x3_c(const unsigned char *src_ptr, int src_stride,
151 const unsigned char *ref_ptr, int ref_stride,
152 unsigned int *sad_array)
153 {
154 sad_array[0] = vp8_sad8x16_c(src_ptr, src_stride, ref_ptr + 0, ref_stride, UINT_MAX);
155 sad_array[1] = vp8_sad8x16_c(src_ptr, src_stride, ref_ptr + 1, ref_stride, UINT_MAX);
156 sad_array[2] = vp8_sad8x16_c(src_ptr, src_stride, ref_ptr + 2, ref_stride, UINT_MAX);
157 }
159 void vp8_sad8x16x8_c(const unsigned char *src_ptr, int src_stride,
160 const unsigned char *ref_ptr, int ref_stride,
161 unsigned short *sad_array)
162 {
163 sad_array[0] = (unsigned short)vp8_sad8x16_c(src_ptr, src_stride, ref_ptr + 0, ref_stride, UINT_MAX);
164 sad_array[1] = (unsigned short)vp8_sad8x16_c(src_ptr, src_stride, ref_ptr + 1, ref_stride, UINT_MAX);
165 sad_array[2] = (unsigned short)vp8_sad8x16_c(src_ptr, src_stride, ref_ptr + 2, ref_stride, UINT_MAX);
166 sad_array[3] = (unsigned short)vp8_sad8x16_c(src_ptr, src_stride, ref_ptr + 3, ref_stride, UINT_MAX);
167 sad_array[4] = (unsigned short)vp8_sad8x16_c(src_ptr, src_stride, ref_ptr + 4, ref_stride, UINT_MAX);
168 sad_array[5] = (unsigned short)vp8_sad8x16_c(src_ptr, src_stride, ref_ptr + 5, ref_stride, UINT_MAX);
169 sad_array[6] = (unsigned short)vp8_sad8x16_c(src_ptr, src_stride, ref_ptr + 6, ref_stride, UINT_MAX);
170 sad_array[7] = (unsigned short)vp8_sad8x16_c(src_ptr, src_stride, ref_ptr + 7, ref_stride, UINT_MAX);
171 }
173 void vp8_sad4x4x3_c(const unsigned char *src_ptr, int src_stride,
174 const unsigned char *ref_ptr, int ref_stride,
175 unsigned int *sad_array)
176 {
177 sad_array[0] = vp8_sad4x4_c(src_ptr, src_stride, ref_ptr + 0, ref_stride, UINT_MAX);
178 sad_array[1] = vp8_sad4x4_c(src_ptr, src_stride, ref_ptr + 1, ref_stride, UINT_MAX);
179 sad_array[2] = vp8_sad4x4_c(src_ptr, src_stride, ref_ptr + 2, ref_stride, UINT_MAX);
180 }
182 void vp8_sad4x4x8_c(const unsigned char *src_ptr, int src_stride,
183 const unsigned char *ref_ptr, int ref_stride,
184 unsigned short *sad_array)
185 {
186 sad_array[0] = (unsigned short)vp8_sad4x4_c(src_ptr, src_stride, ref_ptr + 0, ref_stride, UINT_MAX);
187 sad_array[1] = (unsigned short)vp8_sad4x4_c(src_ptr, src_stride, ref_ptr + 1, ref_stride, UINT_MAX);
188 sad_array[2] = (unsigned short)vp8_sad4x4_c(src_ptr, src_stride, ref_ptr + 2, ref_stride, UINT_MAX);
189 sad_array[3] = (unsigned short)vp8_sad4x4_c(src_ptr, src_stride, ref_ptr + 3, ref_stride, UINT_MAX);
190 sad_array[4] = (unsigned short)vp8_sad4x4_c(src_ptr, src_stride, ref_ptr + 4, ref_stride, UINT_MAX);
191 sad_array[5] = (unsigned short)vp8_sad4x4_c(src_ptr, src_stride, ref_ptr + 5, ref_stride, UINT_MAX);
192 sad_array[6] = (unsigned short)vp8_sad4x4_c(src_ptr, src_stride, ref_ptr + 6, ref_stride, UINT_MAX);
193 sad_array[7] = (unsigned short)vp8_sad4x4_c(src_ptr, src_stride, ref_ptr + 7, ref_stride, UINT_MAX);
194 }
196 void vp8_sad16x16x4d_c(const unsigned char *src_ptr, int src_stride,
197 const unsigned char * const ref_ptr[], int ref_stride,
198 unsigned int *sad_array)
199 {
200 sad_array[0] = vp8_sad16x16_c(src_ptr, src_stride, ref_ptr[0], ref_stride, UINT_MAX);
201 sad_array[1] = vp8_sad16x16_c(src_ptr, src_stride, ref_ptr[1], ref_stride, UINT_MAX);
202 sad_array[2] = vp8_sad16x16_c(src_ptr, src_stride, ref_ptr[2], ref_stride, UINT_MAX);
203 sad_array[3] = vp8_sad16x16_c(src_ptr, src_stride, ref_ptr[3], ref_stride, UINT_MAX);
204 }
206 void vp8_sad16x8x4d_c(const unsigned char *src_ptr, int src_stride,
207 const unsigned char * const ref_ptr[], int ref_stride,
208 unsigned int *sad_array)
209 {
210 sad_array[0] = vp8_sad16x8_c(src_ptr, src_stride, ref_ptr[0], ref_stride, UINT_MAX);
211 sad_array[1] = vp8_sad16x8_c(src_ptr, src_stride, ref_ptr[1], ref_stride, UINT_MAX);
212 sad_array[2] = vp8_sad16x8_c(src_ptr, src_stride, ref_ptr[2], ref_stride, UINT_MAX);
213 sad_array[3] = vp8_sad16x8_c(src_ptr, src_stride, ref_ptr[3], ref_stride, UINT_MAX);
214 }
216 void vp8_sad8x8x4d_c(const unsigned char *src_ptr, int src_stride,
217 const unsigned char * const ref_ptr[], int ref_stride,
218 unsigned int *sad_array)
219 {
220 sad_array[0] = vp8_sad8x8_c(src_ptr, src_stride, ref_ptr[0], ref_stride, UINT_MAX);
221 sad_array[1] = vp8_sad8x8_c(src_ptr, src_stride, ref_ptr[1], ref_stride, UINT_MAX);
222 sad_array[2] = vp8_sad8x8_c(src_ptr, src_stride, ref_ptr[2], ref_stride, UINT_MAX);
223 sad_array[3] = vp8_sad8x8_c(src_ptr, src_stride, ref_ptr[3], ref_stride, UINT_MAX);
224 }
226 void vp8_sad8x16x4d_c(const unsigned char *src_ptr, int src_stride,
227 const unsigned char * const ref_ptr[], int ref_stride,
228 unsigned int *sad_array)
229 {
230 sad_array[0] = vp8_sad8x16_c(src_ptr, src_stride, ref_ptr[0], ref_stride, UINT_MAX);
231 sad_array[1] = vp8_sad8x16_c(src_ptr, src_stride, ref_ptr[1], ref_stride, UINT_MAX);
232 sad_array[2] = vp8_sad8x16_c(src_ptr, src_stride, ref_ptr[2], ref_stride, UINT_MAX);
233 sad_array[3] = vp8_sad8x16_c(src_ptr, src_stride, ref_ptr[3], ref_stride, UINT_MAX);
234 }
236 void vp8_sad4x4x4d_c(const unsigned char *src_ptr, int src_stride,
237 const unsigned char * const ref_ptr[], int ref_stride,
238 unsigned int *sad_array)
239 {
240 sad_array[0] = vp8_sad4x4_c(src_ptr, src_stride, ref_ptr[0], ref_stride, UINT_MAX);
241 sad_array[1] = vp8_sad4x4_c(src_ptr, src_stride, ref_ptr[1], ref_stride, UINT_MAX);
242 sad_array[2] = vp8_sad4x4_c(src_ptr, src_stride, ref_ptr[2], ref_stride, UINT_MAX);
243 sad_array[3] = vp8_sad4x4_c(src_ptr, src_stride, ref_ptr[3], ref_stride, UINT_MAX);
244 }
246 /* Copy 2 macroblocks to a buffer */
247 void vp8_copy32xn_c(unsigned char *src_ptr, int src_stride,
248 unsigned char *dst_ptr, int dst_stride,
249 int height)
250 {
251 int r;
253 for (r = 0; r < height; r++)
254 {
255 #if !(CONFIG_FAST_UNALIGNED)
256 dst_ptr[0] = src_ptr[0];
257 dst_ptr[1] = src_ptr[1];
258 dst_ptr[2] = src_ptr[2];
259 dst_ptr[3] = src_ptr[3];
260 dst_ptr[4] = src_ptr[4];
261 dst_ptr[5] = src_ptr[5];
262 dst_ptr[6] = src_ptr[6];
263 dst_ptr[7] = src_ptr[7];
264 dst_ptr[8] = src_ptr[8];
265 dst_ptr[9] = src_ptr[9];
266 dst_ptr[10] = src_ptr[10];
267 dst_ptr[11] = src_ptr[11];
268 dst_ptr[12] = src_ptr[12];
269 dst_ptr[13] = src_ptr[13];
270 dst_ptr[14] = src_ptr[14];
271 dst_ptr[15] = src_ptr[15];
272 dst_ptr[16] = src_ptr[16];
273 dst_ptr[17] = src_ptr[17];
274 dst_ptr[18] = src_ptr[18];
275 dst_ptr[19] = src_ptr[19];
276 dst_ptr[20] = src_ptr[20];
277 dst_ptr[21] = src_ptr[21];
278 dst_ptr[22] = src_ptr[22];
279 dst_ptr[23] = src_ptr[23];
280 dst_ptr[24] = src_ptr[24];
281 dst_ptr[25] = src_ptr[25];
282 dst_ptr[26] = src_ptr[26];
283 dst_ptr[27] = src_ptr[27];
284 dst_ptr[28] = src_ptr[28];
285 dst_ptr[29] = src_ptr[29];
286 dst_ptr[30] = src_ptr[30];
287 dst_ptr[31] = src_ptr[31];
288 #else
289 ((uint32_t *)dst_ptr)[0] = ((uint32_t *)src_ptr)[0] ;
290 ((uint32_t *)dst_ptr)[1] = ((uint32_t *)src_ptr)[1] ;
291 ((uint32_t *)dst_ptr)[2] = ((uint32_t *)src_ptr)[2] ;
292 ((uint32_t *)dst_ptr)[3] = ((uint32_t *)src_ptr)[3] ;
293 ((uint32_t *)dst_ptr)[4] = ((uint32_t *)src_ptr)[4] ;
294 ((uint32_t *)dst_ptr)[5] = ((uint32_t *)src_ptr)[5] ;
295 ((uint32_t *)dst_ptr)[6] = ((uint32_t *)src_ptr)[6] ;
296 ((uint32_t *)dst_ptr)[7] = ((uint32_t *)src_ptr)[7] ;
297 #endif
298 src_ptr += src_stride;
299 dst_ptr += dst_stride;
301 }
302 }
