50 lines
1.1 KiB
C++
50 lines
1.1 KiB
C++
/*
|
|
* 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 "./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
|
|
)
|
|
{
|
|
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_
|