michael@0: /*
michael@0:  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
michael@0:  *
michael@0:  *  Use of this source code is governed by a BSD-style license
michael@0:  *  that can be found in the LICENSE file in the root of the source
michael@0:  *  tree. An additional intellectual property rights grant can be found
michael@0:  *  in the file PATENTS.  All contributing project authors may
michael@0:  *  be found in the AUTHORS file in the root of the source tree.
michael@0:  */
michael@0: 
michael@0: 
michael@0: #include "treewriter.h"
michael@0: 
michael@0: static void cost(
michael@0:     int *const C,
michael@0:     vp8_tree T,
michael@0:     const vp8_prob *const P,
michael@0:     int i,
michael@0:     int c
michael@0: )
michael@0: {
michael@0:     const vp8_prob p = P [i>>1];
michael@0: 
michael@0:     do
michael@0:     {
michael@0:         const vp8_tree_index j = T[i];
michael@0:         const int d = c + vp8_cost_bit(p, i & 1);
michael@0: 
michael@0:         if (j <= 0)
michael@0:             C[-j] = d;
michael@0:         else
michael@0:             cost(C, T, P, j, d);
michael@0:     }
michael@0:     while (++i & 1);
michael@0: }
michael@0: void vp8_cost_tokens(int *c, const vp8_prob *p, vp8_tree t)
michael@0: {
michael@0:     cost(c, t, p, 0, 0);
michael@0: }
michael@0: void vp8_cost_tokens2(int *c, const vp8_prob *p, vp8_tree t,int start)
michael@0: {
michael@0:     cost(c, t, p, start, 0);
michael@0: }