The Tor Browser: media/libvpx/vp9/encoder/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  */

    11 #ifndef VP9_ENCODER_VP9_BLOCK_H_

    12 #define VP9_ENCODER_VP9_BLOCK_H_

    14 #include "vp9/common/vp9_onyx.h"

    15 #include "vp9/common/vp9_entropymv.h"

    16 #include "vp9/common/vp9_entropy.h"

    17 #include "vpx_ports/mem.h"

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

    20 // motion search site

    21 typedef struct {

    22   MV mv;

    23   int offset;

    24 } search_site;

    26 // Structure to hold snapshot of coding context during the mode picking process

    27 typedef struct {

    28   MODE_INFO mic;

    29   uint8_t *zcoeff_blk;

    30   int16_t *coeff[MAX_MB_PLANE][3];

    31   int16_t *qcoeff[MAX_MB_PLANE][3];

    32   int16_t *dqcoeff[MAX_MB_PLANE][3];

    33   uint16_t *eobs[MAX_MB_PLANE][3];

    35   // dual buffer pointers, 0: in use, 1: best in store

    36   int16_t *coeff_pbuf[MAX_MB_PLANE][3];

    37   int16_t *qcoeff_pbuf[MAX_MB_PLANE][3];

    38   int16_t *dqcoeff_pbuf[MAX_MB_PLANE][3];

    39   uint16_t *eobs_pbuf[MAX_MB_PLANE][3];

    41   int is_coded;

    42   int num_4x4_blk;

    43   int skip;

    44   int_mv best_ref_mv;

    45   int_mv second_best_ref_mv;

    46   int_mv ref_mvs[MAX_REF_FRAMES][MAX_MV_REF_CANDIDATES];

    47   int rate;

    48   int distortion;

    49   int64_t intra_error;

    50   int best_mode_index;

    51   int rddiv;

    52   int rdmult;

    53   int hybrid_pred_diff;

    54   int comp_pred_diff;

    55   int single_pred_diff;

    56   int64_t tx_rd_diff[TX_MODES];

    57   int64_t best_filter_diff[SWITCHABLE_FILTER_CONTEXTS];

    59   // motion vector cache for adaptive motion search control in partition

    60   // search loop

    61   int_mv pred_mv[MAX_REF_FRAMES];

    63   // Bit flag for each mode whether it has high error in comparison to others.

    64   unsigned int modes_with_high_error;

    66   // Bit flag for each ref frame whether it has high error compared to others.

    67   unsigned int frames_with_high_error;

    68 } PICK_MODE_CONTEXT;

    70 struct macroblock_plane {

    71   DECLARE_ALIGNED(16, int16_t, src_diff[64 * 64]);

    72   int16_t *coeff;

    73   struct buf_2d src;

    75   // Quantizer setings

    76   int16_t *quant;

    77   int16_t *quant_shift;

    78   int16_t *zbin;

    79   int16_t *round;

    81   // Zbin Over Quant value

    82   int16_t zbin_extra;

    83 };

    85 /* The [2] dimension is for whether we skip the EOB node (i.e. if previous

    86  * coefficient in this block was zero) or not. */

    87 typedef unsigned int vp9_coeff_cost[BLOCK_TYPES][REF_TYPES][COEF_BANDS][2]

    88                                    [PREV_COEF_CONTEXTS][MAX_ENTROPY_TOKENS];

    90 typedef struct macroblock MACROBLOCK;

    91 struct macroblock {

    92   struct macroblock_plane plane[MAX_MB_PLANE];

    94   MACROBLOCKD e_mbd;

    95   int skip_block;

    96   int select_txfm_size;

    97   int skip_recode;

    98   int skip_optimize;

    99   int q_index;

   101   search_site *ss;

   102   int ss_count;

   103   int searches_per_step;

   105   int errorperbit;

   106   int sadperbit16;

   107   int sadperbit4;

   108   int rddiv;

   109   int rdmult;

   110   unsigned int mb_energy;

   111   unsigned int *mb_activity_ptr;

   112   int *mb_norm_activity_ptr;

   113   signed int act_zbin_adj;

   115   int mv_best_ref_index[MAX_REF_FRAMES];

   116   unsigned int max_mv_context[MAX_REF_FRAMES];

   117   unsigned int source_variance;

   119   int nmvjointcost[MV_JOINTS];

   120   int nmvcosts[2][MV_VALS];

   121   int *nmvcost[2];

   122   int nmvcosts_hp[2][MV_VALS];

   123   int *nmvcost_hp[2];

   124   int **mvcost;

   126   int nmvjointsadcost[MV_JOINTS];

   127   int nmvsadcosts[2][MV_VALS];

   128   int *nmvsadcost[2];

   129   int nmvsadcosts_hp[2][MV_VALS];

   130   int *nmvsadcost_hp[2];

   131   int **mvsadcost;

   133   int mbmode_cost[MB_MODE_COUNT];

   134   unsigned inter_mode_cost[INTER_MODE_CONTEXTS][INTER_MODES];

   135   int intra_uv_mode_cost[2][MB_MODE_COUNT];

   136   int y_mode_costs[INTRA_MODES][INTRA_MODES][INTRA_MODES];

   137   int switchable_interp_costs[SWITCHABLE_FILTER_CONTEXTS][SWITCHABLE_FILTERS];

   139   unsigned char sb_index;   // index of 32x32 block inside the 64x64 block

   140   unsigned char mb_index;   // index of 16x16 block inside the 32x32 block

   141   unsigned char b_index;    // index of 8x8 block inside the 16x16 block

   142   unsigned char ab_index;   // index of 4x4 block inside the 8x8 block

   144   // These define limits to motion vector components to prevent them

   145   // from extending outside the UMV borders

   146   int mv_col_min;

   147   int mv_col_max;

   148   int mv_row_min;

   149   int mv_row_max;

   151   uint8_t zcoeff_blk[TX_SIZES][256];

   152   int skip;

   154   int encode_breakout;

   156   unsigned char *active_ptr;

   158   // note that token_costs is the cost when eob node is skipped

   159   vp9_coeff_cost token_costs[TX_SIZES];

   160   DECLARE_ALIGNED(16, uint8_t, token_cache[1024]);

   162   int optimize;

   164   // indicate if it is in the rd search loop or encoding process

   165   int use_lp32x32fdct;

   166   int skip_encode;

   168   // Used to store sub partition's choices.

   169   int fast_ms;

   170   int_mv pred_mv[MAX_REF_FRAMES];

   171   int subblock_ref;

   173   // TODO(jingning): Need to refactor the structure arrays that buffers the

   174   // coding mode decisions of each partition type.

   175   PICK_MODE_CONTEXT ab4x4_context[4][4][4];

   176   PICK_MODE_CONTEXT sb8x4_context[4][4][4];

   177   PICK_MODE_CONTEXT sb4x8_context[4][4][4];

   178   PICK_MODE_CONTEXT sb8x8_context[4][4][4];

   179   PICK_MODE_CONTEXT sb8x16_context[4][4][2];

   180   PICK_MODE_CONTEXT sb16x8_context[4][4][2];

   181   PICK_MODE_CONTEXT mb_context[4][4];

   182   PICK_MODE_CONTEXT sb32x16_context[4][2];

   183   PICK_MODE_CONTEXT sb16x32_context[4][2];

   184   // when 4 MBs share coding parameters:

   185   PICK_MODE_CONTEXT sb32_context[4];

   186   PICK_MODE_CONTEXT sb32x64_context[2];

   187   PICK_MODE_CONTEXT sb64x32_context[2];

   188   PICK_MODE_CONTEXT sb64_context;

   189   int partition_cost[PARTITION_CONTEXTS][PARTITION_TYPES];

   191   BLOCK_SIZE b_partitioning[4][4][4];

   192   BLOCK_SIZE mb_partitioning[4][4];

   193   BLOCK_SIZE sb_partitioning[4];

   194   BLOCK_SIZE sb64_partitioning;

   196   void (*fwd_txm4x4)(const int16_t *input, int16_t *output, int stride);

   197 };

   199 // TODO(jingning): the variables used here are little complicated. need further

   200 // refactoring on organizing the temporary buffers, when recursive

   201 // partition down to 4x4 block size is enabled.

   202 static PICK_MODE_CONTEXT *get_block_context(MACROBLOCK *x, BLOCK_SIZE bsize) {

   203   switch (bsize) {

   204     case BLOCK_64X64:

   205       return &x->sb64_context;

   206     case BLOCK_64X32:

   207       return &x->sb64x32_context[x->sb_index];

   208     case BLOCK_32X64:

   209       return &x->sb32x64_context[x->sb_index];

   210     case BLOCK_32X32:

   211       return &x->sb32_context[x->sb_index];

   212     case BLOCK_32X16:

   213       return &x->sb32x16_context[x->sb_index][x->mb_index];

   214     case BLOCK_16X32:

   215       return &x->sb16x32_context[x->sb_index][x->mb_index];

   216     case BLOCK_16X16:

   217       return &x->mb_context[x->sb_index][x->mb_index];

   218     case BLOCK_16X8:

   219       return &x->sb16x8_context[x->sb_index][x->mb_index][x->b_index];

   220     case BLOCK_8X16:

   221       return &x->sb8x16_context[x->sb_index][x->mb_index][x->b_index];

   222     case BLOCK_8X8:

   223       return &x->sb8x8_context[x->sb_index][x->mb_index][x->b_index];

   224     case BLOCK_8X4:

   225       return &x->sb8x4_context[x->sb_index][x->mb_index][x->b_index];

   226     case BLOCK_4X8:

   227       return &x->sb4x8_context[x->sb_index][x->mb_index][x->b_index];

   228     case BLOCK_4X4:

   229       return &x->ab4x4_context[x->sb_index][x->mb_index][x->b_index];

   230     default:

   231       assert(0);

   232       return NULL;

   233   }

   234 }

   236 struct rdcost_block_args {

   237   MACROBLOCK *x;

   238   ENTROPY_CONTEXT t_above[16];

   239   ENTROPY_CONTEXT t_left[16];

   240   TX_SIZE tx_size;

   241   int bw;

   242   int bh;

   243   int rate;

   244   int64_t dist;

   245   int64_t sse;

   246   int this_rate;

   247   int64_t this_dist;

   248   int64_t this_sse;

   249   int64_t this_rd;

   250   int64_t best_rd;

   251   int skip;

   252   const int16_t *scan, *nb;

   253 };

   255 #endif  // VP9_ENCODER_VP9_BLOCK_H_

The Tor Browser / file revision

media/libvpx/vp9/encoder/vp9_block.h@ac0c01689b40

media/libvpx/vp9/encoder/vp9_block.h