media/libvpx/vp8/common/idct_blk.c@ac0c01689b40
media/libvpx/vp8/common/idct_blk.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 */
11 #include "vpx_config.h"
12 #include "vp8_rtcd.h"
13 #include "vpx_mem/vpx_mem.h"
15 void vp8_dequant_idct_add_c(short *input, short *dq,
16 unsigned char *dest, int stride);
17 void vp8_dc_only_idct_add_c(short input_dc, unsigned char * pred,
18 int pred_stride, unsigned char *dst_ptr,
19 int dst_stride);
21 void vp8_dequant_idct_add_y_block_c
22 (short *q, short *dq,
23 unsigned char *dst, int stride, char *eobs)
24 {
25 int i, j;
27 for (i = 0; i < 4; i++)
28 {
29 for (j = 0; j < 4; j++)
30 {
31 if (*eobs++ > 1)
32 vp8_dequant_idct_add_c (q, dq, dst, stride);
33 else
34 {
35 vp8_dc_only_idct_add_c (q[0]*dq[0], dst, stride, dst, stride);
36 vpx_memset(q, 0, 2 * sizeof(q[0]));
37 }
39 q += 16;
40 dst += 4;
41 }
43 dst += 4*stride - 16;
44 }
45 }
47 void vp8_dequant_idct_add_uv_block_c
48 (short *q, short *dq,
49 unsigned char *dstu, unsigned char *dstv, int stride, char *eobs)
50 {
51 int i, j;
53 for (i = 0; i < 2; i++)
54 {
55 for (j = 0; j < 2; j++)
56 {
57 if (*eobs++ > 1)
58 vp8_dequant_idct_add_c (q, dq, dstu, stride);
59 else
60 {
61 vp8_dc_only_idct_add_c (q[0]*dq[0], dstu, stride, dstu, stride);
62 vpx_memset(q, 0, 2 * sizeof(q[0]));
63 }
65 q += 16;
66 dstu += 4;
67 }
69 dstu += 4*stride - 8;
70 }
72 for (i = 0; i < 2; i++)
73 {
74 for (j = 0; j < 2; j++)
75 {
76 if (*eobs++ > 1)
77 vp8_dequant_idct_add_c (q, dq, dstv, stride);
78 else
79 {
80 vp8_dc_only_idct_add_c (q[0]*dq[0], dstv, stride, dstv, stride);
81 vpx_memset(q, 0, 2 * sizeof(q[0]));
82 }
84 q += 16;
85 dstv += 4;
86 }
88 dstv += 4*stride - 8;
89 }
90 }
