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 /*

  *  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 TREEREADER_H_

 #define TREEREADER_H_

 #include "vp8/common/treecoder.h"

 #include "dboolhuff.h"

 typedef BOOL_DECODER vp8_reader;

 #define vp8_read vp8dx_decode_bool

 #define vp8_read_literal vp8_decode_value

 #define vp8_read_bit(R) vp8_read(R, vp8_prob_half)

 /* Intent of tree data structure is to make decoding trivial. */

 static int vp8_treed_read(

     vp8_reader *const r,        /* !!! must return a 0 or 1 !!! */

     vp8_tree t,

     const vp8_prob *const p

 )

 {

     register vp8_tree_index i = 0;

     while ((i = t[ i + vp8_read(r, p[i>>1])]) > 0) ;

     return -i;

 }

 #endif  // TREEREADER_H_