ref: 3338af41092added3024a4ed4b9934262a578433
dir: /vp9/decoder/treereader.h/
/*
* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef tree_reader_h
#define tree_reader_h 1
#include "vp9/common/treecoder.h"
#include "dboolhuff.h"
typedef BOOL_DECODER vp9_reader;
#define vp9_read decode_bool
#define vp9_read_literal decode_value
#define vp9_read_bit(R) vp9_read(R, vp9_prob_half)
/* Intent of tree data structure is to make decoding trivial. */
static int treed_read(vp9_reader *const r, /* !!! must return a 0 or 1 !!! */
vp9_tree t,
const vp9_prob *const p) {
register vp9_tree_index i = 0;
while ((i = t[ i + vp9_read(r, p[i >> 1])]) > 0);
return -i;
}
#endif /* tree_reader_h */