The Tor Browser: media/libvpx/vp8/encoder/treewriter.c@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     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 #include "treewriter.h"

    14 static void cost(

    15     int *const C,

    16     vp8_tree T,

    17     const vp8_prob *const P,

    18     int i,

    19     int c

    20 )

    21 {

    22     const vp8_prob p = P [i>>1];

    24     do

    25     {

    26         const vp8_tree_index j = T[i];

    27         const int d = c + vp8_cost_bit(p, i & 1);

    29         if (j <= 0)

    30             C[-j] = d;

    31         else

    32             cost(C, T, P, j, d);

    33     }

    34     while (++i & 1);

    35 }

    36 void vp8_cost_tokens(int *c, const vp8_prob *p, vp8_tree t)

    37 {

    38     cost(c, t, p, 0, 0);

    39 }

    40 void vp8_cost_tokens2(int *c, const vp8_prob *p, vp8_tree t,int start)

    41 {

    42     cost(c, t, p, start, 0);

    43 }

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