media/libvpx/vp8/common/x86/idct_blk_mmx.c@ac0c01689b40
media/libvpx/vp8/common/x86/idct_blk_mmx.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 "vp8/common/blockd.h"
14 #include "vpx_mem/vpx_mem.h"
16 extern void vp8_dequantize_b_impl_mmx(short *sq, short *dq, short *q);
18 void vp8_dequantize_b_mmx(BLOCKD *d, short *DQC)
19 {
20 short *sq = (short *) d->qcoeff;
21 short *dq = (short *) d->dqcoeff;
23 vp8_dequantize_b_impl_mmx(sq, dq, DQC);
24 }
26 void vp8_dequant_idct_add_y_block_mmx
27 (short *q, short *dq,
28 unsigned char *dst, int stride, char *eobs)
29 {
30 int i;
32 for (i = 0; i < 4; i++)
33 {
34 if (eobs[0] > 1)
35 vp8_dequant_idct_add_mmx (q, dq, dst, stride);
36 else if (eobs[0] == 1)
37 {
38 vp8_dc_only_idct_add_mmx (q[0]*dq[0], dst, stride, dst, stride);
39 vpx_memset(q, 0, 2 * sizeof(q[0]));
40 }
42 if (eobs[1] > 1)
43 vp8_dequant_idct_add_mmx (q+16, dq, dst+4, stride);
44 else if (eobs[1] == 1)
45 {
46 vp8_dc_only_idct_add_mmx (q[16]*dq[0], dst+4, stride,
47 dst+4, stride);
48 vpx_memset(q + 16, 0, 2 * sizeof(q[0]));
49 }
51 if (eobs[2] > 1)
52 vp8_dequant_idct_add_mmx (q+32, dq, dst+8, stride);
53 else if (eobs[2] == 1)
54 {
55 vp8_dc_only_idct_add_mmx (q[32]*dq[0], dst+8, stride,
56 dst+8, stride);
57 vpx_memset(q + 32, 0, 2 * sizeof(q[0]));
58 }
60 if (eobs[3] > 1)
61 vp8_dequant_idct_add_mmx (q+48, dq, dst+12, stride);
62 else if (eobs[3] == 1)
63 {
64 vp8_dc_only_idct_add_mmx (q[48]*dq[0], dst+12, stride,
65 dst+12, stride);
66 vpx_memset(q + 48, 0, 2 * sizeof(q[0]));
67 }
69 q += 64;
70 dst += 4*stride;
71 eobs += 4;
72 }
73 }
75 void vp8_dequant_idct_add_uv_block_mmx
76 (short *q, short *dq,
77 unsigned char *dstu, unsigned char *dstv, int stride, char *eobs)
78 {
79 int i;
81 for (i = 0; i < 2; i++)
82 {
83 if (eobs[0] > 1)
84 vp8_dequant_idct_add_mmx (q, dq, dstu, stride);
85 else if (eobs[0] == 1)
86 {
87 vp8_dc_only_idct_add_mmx (q[0]*dq[0], dstu, stride, dstu, stride);
88 vpx_memset(q, 0, 2 * sizeof(q[0]));
89 }
91 if (eobs[1] > 1)
92 vp8_dequant_idct_add_mmx (q+16, dq, dstu+4, stride);
93 else if (eobs[1] == 1)
94 {
95 vp8_dc_only_idct_add_mmx (q[16]*dq[0], dstu+4, stride,
96 dstu+4, stride);
97 vpx_memset(q + 16, 0, 2 * sizeof(q[0]));
98 }
100 q += 32;
101 dstu += 4*stride;
102 eobs += 2;
103 }
105 for (i = 0; i < 2; i++)
106 {
107 if (eobs[0] > 1)
108 vp8_dequant_idct_add_mmx (q, dq, dstv, stride);
109 else if (eobs[0] == 1)
110 {
111 vp8_dc_only_idct_add_mmx (q[0]*dq[0], dstv, stride, dstv, stride);
112 vpx_memset(q, 0, 2 * sizeof(q[0]));
113 }
115 if (eobs[1] > 1)
116 vp8_dequant_idct_add_mmx (q+16, dq, dstv+4, stride);
117 else if (eobs[1] == 1)
118 {
119 vp8_dc_only_idct_add_mmx (q[16]*dq[0], dstv+4, stride,
120 dstv+4, stride);
121 vpx_memset(q + 16, 0, 2 * sizeof(q[0]));
122 }
124 q += 32;
125 dstv += 4*stride;
126 eobs += 2;
127 }
128 }
