| /* |
| * 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_ |