ref: 1bf0beb5fc00d2fd7a80bd1de0f135e45404d941
dir: /vp8/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 VP8_DECODER_TREEREADER_H_
#define VP8_DECODER_TREEREADER_H_
#include "vp8/common/treecoder.h"
#include "dboolhuff.h"
#ifdef __cplusplus
extern "C" {
#endif
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;
}
#ifdef __cplusplus
} // extern "C"
#endif
#endif // VP8_DECODER_TREEREADER_H_