1233d2500723e5594f3e7c70896ffeeef32b9c950ywan/* 2233d2500723e5594f3e7c70896ffeeef32b9c950ywan * Copyright (c) 2010 The WebM project authors. All Rights Reserved. 3233d2500723e5594f3e7c70896ffeeef32b9c950ywan * 4233d2500723e5594f3e7c70896ffeeef32b9c950ywan * Use of this source code is governed by a BSD-style license 5233d2500723e5594f3e7c70896ffeeef32b9c950ywan * that can be found in the LICENSE file in the root of the source 6233d2500723e5594f3e7c70896ffeeef32b9c950ywan * tree. An additional intellectual property rights grant can be found 7233d2500723e5594f3e7c70896ffeeef32b9c950ywan * in the file PATENTS. All contributing project authors may 8233d2500723e5594f3e7c70896ffeeef32b9c950ywan * be found in the AUTHORS file in the root of the source tree. 9233d2500723e5594f3e7c70896ffeeef32b9c950ywan */ 10233d2500723e5594f3e7c70896ffeeef32b9c950ywan 11233d2500723e5594f3e7c70896ffeeef32b9c950ywan 12233d2500723e5594f3e7c70896ffeeef32b9c950ywan#ifndef VP8_DECODER_TREEREADER_H_ 13233d2500723e5594f3e7c70896ffeeef32b9c950ywan#define VP8_DECODER_TREEREADER_H_ 14233d2500723e5594f3e7c70896ffeeef32b9c950ywan 15233d2500723e5594f3e7c70896ffeeef32b9c950ywan#include "vp8/common/treecoder.h" 16233d2500723e5594f3e7c70896ffeeef32b9c950ywan#include "dboolhuff.h" 17233d2500723e5594f3e7c70896ffeeef32b9c950ywan 18233d2500723e5594f3e7c70896ffeeef32b9c950ywan#ifdef __cplusplus 19233d2500723e5594f3e7c70896ffeeef32b9c950ywanextern "C" { 20233d2500723e5594f3e7c70896ffeeef32b9c950ywan#endif 21233d2500723e5594f3e7c70896ffeeef32b9c950ywan 22233d2500723e5594f3e7c70896ffeeef32b9c950ywantypedef BOOL_DECODER vp8_reader; 23233d2500723e5594f3e7c70896ffeeef32b9c950ywan 24233d2500723e5594f3e7c70896ffeeef32b9c950ywan#define vp8_read vp8dx_decode_bool 25233d2500723e5594f3e7c70896ffeeef32b9c950ywan#define vp8_read_literal vp8_decode_value 26233d2500723e5594f3e7c70896ffeeef32b9c950ywan#define vp8_read_bit(R) vp8_read(R, vp8_prob_half) 27233d2500723e5594f3e7c70896ffeeef32b9c950ywan 28233d2500723e5594f3e7c70896ffeeef32b9c950ywan 29233d2500723e5594f3e7c70896ffeeef32b9c950ywan/* Intent of tree data structure is to make decoding trivial. */ 30233d2500723e5594f3e7c70896ffeeef32b9c950ywan 31233d2500723e5594f3e7c70896ffeeef32b9c950ywanstatic int vp8_treed_read( 32233d2500723e5594f3e7c70896ffeeef32b9c950ywan vp8_reader *const r, /* !!! must return a 0 or 1 !!! */ 33233d2500723e5594f3e7c70896ffeeef32b9c950ywan vp8_tree t, 34233d2500723e5594f3e7c70896ffeeef32b9c950ywan const vp8_prob *const p 35233d2500723e5594f3e7c70896ffeeef32b9c950ywan) 36233d2500723e5594f3e7c70896ffeeef32b9c950ywan{ 37233d2500723e5594f3e7c70896ffeeef32b9c950ywan register vp8_tree_index i = 0; 38233d2500723e5594f3e7c70896ffeeef32b9c950ywan 39233d2500723e5594f3e7c70896ffeeef32b9c950ywan while ((i = t[ i + vp8_read(r, p[i>>1])]) > 0) ; 40233d2500723e5594f3e7c70896ffeeef32b9c950ywan 41233d2500723e5594f3e7c70896ffeeef32b9c950ywan return -i; 42233d2500723e5594f3e7c70896ffeeef32b9c950ywan} 43233d2500723e5594f3e7c70896ffeeef32b9c950ywan 44233d2500723e5594f3e7c70896ffeeef32b9c950ywan#ifdef __cplusplus 45233d2500723e5594f3e7c70896ffeeef32b9c950ywan} // extern "C" 46233d2500723e5594f3e7c70896ffeeef32b9c950ywan#endif 47233d2500723e5594f3e7c70896ffeeef32b9c950ywan 48233d2500723e5594f3e7c70896ffeeef32b9c950ywan#endif // VP8_DECODER_TREEREADER_H_ 49