media/libvpx/vp8/common/entropymv.h@ac0c01689b40
media/libvpx/vp8/common/entropymv.h
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 #ifndef __INC_ENTROPYMV_H
13 #define __INC_ENTROPYMV_H
15 #include "treecoder.h"
17 enum
18 {
19 mv_max = 1023, /* max absolute value of a MV component */
20 MVvals = (2 * mv_max) + 1, /* # possible values "" */
21 mvfp_max = 255, /* max absolute value of a full pixel MV component */
22 MVfpvals = (2 * mvfp_max) +1, /* # possible full pixel MV values */
24 mvlong_width = 10, /* Large MVs have 9 bit magnitudes */
25 mvnum_short = 8, /* magnitudes 0 through 7 */
27 /* probability offsets for coding each MV component */
29 mvpis_short = 0, /* short (<= 7) vs long (>= 8) */
30 MVPsign, /* sign for non-zero */
31 MVPshort, /* 8 short values = 7-position tree */
33 MVPbits = MVPshort + mvnum_short - 1, /* mvlong_width long value bits */
34 MVPcount = MVPbits + mvlong_width /* (with independent probabilities) */
35 };
37 typedef struct mv_context
38 {
39 vp8_prob prob[MVPcount]; /* often come in row, col pairs */
40 } MV_CONTEXT;
42 extern const MV_CONTEXT vp8_mv_update_probs[2], vp8_default_mv_context[2];
44 #endif
