The Tor Browser: media/libvpx/vp9/common/vp9

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 VP9_COMMON_VP9_FINDNEARMV_H_

    13 #define VP9_COMMON_VP9_FINDNEARMV_H_

    15 #include "vp9/common/vp9_mv.h"

    16 #include "vp9/common/vp9_blockd.h"

    17 #include "vp9/common/vp9_treecoder.h"

    18 #include "vp9/common/vp9_onyxc_int.h"

    20 #define LEFT_TOP_MARGIN     ((VP9BORDERINPIXELS - VP9_INTERP_EXTEND) << 3)

    21 #define RIGHT_BOTTOM_MARGIN ((VP9BORDERINPIXELS - VP9_INTERP_EXTEND) << 3)

    23 // check a list of motion vectors by sad score using a number rows of pixels

    24 // above and a number cols of pixels in the left to select the one with best

    25 // score to use as ref motion vector

    26 void vp9_find_best_ref_mvs(MACROBLOCKD *xd, int allow_hp,

    27                            int_mv *mvlist, int_mv *nearest, int_mv *near);

    29 // TODO(jingning): this mv clamping function should be block size dependent.

    30 static void clamp_mv2(MV *mv, const MACROBLOCKD *xd) {

    31   clamp_mv(mv, xd->mb_to_left_edge - LEFT_TOP_MARGIN,

    32                xd->mb_to_right_edge + RIGHT_BOTTOM_MARGIN,

    33                xd->mb_to_top_edge - LEFT_TOP_MARGIN,

    34                xd->mb_to_bottom_edge + RIGHT_BOTTOM_MARGIN);

    35 }

    37 void vp9_append_sub8x8_mvs_for_idx(VP9_COMMON *cm, MACROBLOCKD *xd,

    38                                    const TileInfo *const tile,

    39                                    int_mv *dst_nearest,

    40                                    int_mv *dst_near,

    41                                    int block_idx, int ref_idx,

    42                                    int mi_row, int mi_col);

    44 static MB_PREDICTION_MODE left_block_mode(const MODE_INFO *cur_mi,

    45                                           const MODE_INFO *left_mi, int b) {

    46   if (b == 0 || b == 2) {

    47     if (!left_mi || is_inter_block(&left_mi->mbmi))

    48       return DC_PRED;

    50     return left_mi->mbmi.sb_type < BLOCK_8X8 ? left_mi->bmi[b + 1].as_mode

    51                                              : left_mi->mbmi.mode;

    52   } else {

    53     assert(b == 1 || b == 3);

    54     return cur_mi->bmi[b - 1].as_mode;

    55   }

    56 }

    58 static MB_PREDICTION_MODE above_block_mode(const MODE_INFO *cur_mi,

    59                                            const MODE_INFO *above_mi, int b) {

    60   if (b == 0 || b == 1) {

    61     if (!above_mi || is_inter_block(&above_mi->mbmi))

    62       return DC_PRED;

    64     return above_mi->mbmi.sb_type < BLOCK_8X8 ? above_mi->bmi[b + 2].as_mode

    65                                               : above_mi->mbmi.mode;

    66   } else {

    67     assert(b == 2 || b == 3);

    68     return cur_mi->bmi[b - 2].as_mode;

    69   }

    70 }

    72 #endif  // VP9_COMMON_VP9_FINDNEARMV_H_

The Tor Browser / file revision

media/libvpx/vp9/common/vp9_findnearmv.h@ac0c01689b40

media/libvpx/vp9/common/vp9_findnearmv.h