ref: d55682c2aadbca664727fde886d42d39f7cbb5cd
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 VPX_VP8_DECODER_TREEREADER_H_
#define VPX_VP8_DECODER_TREEREADER_H_
#include "./vpx_config.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 INLINE int vp8_treed_read(
vp8_reader *const r, /* !!! must return a 0 or 1 !!! */
vp8_tree t, const vp8_prob *const p) {
vp8_tree_index i = 0;
while ((i = t[i + vp8_read(r, p[i >> 1])]) > 0) {
}
return -i;
}
#ifdef __cplusplus
} // extern "C"
#endif
#endif // VPX_VP8_DECODER_TREEREADER_H_