1*fb1b10abSAndroid Build Coastguard Worker /* 2*fb1b10abSAndroid Build Coastguard Worker * Copyright (c) 2010 The WebM project authors. All Rights Reserved. 3*fb1b10abSAndroid Build Coastguard Worker * 4*fb1b10abSAndroid Build Coastguard Worker * Use of this source code is governed by a BSD-style license 5*fb1b10abSAndroid Build Coastguard Worker * that can be found in the LICENSE file in the root of the source 6*fb1b10abSAndroid Build Coastguard Worker * tree. An additional intellectual property rights grant can be found 7*fb1b10abSAndroid Build Coastguard Worker * in the file PATENTS. All contributing project authors may 8*fb1b10abSAndroid Build Coastguard Worker * be found in the AUTHORS file in the root of the source tree. 9*fb1b10abSAndroid Build Coastguard Worker */ 10*fb1b10abSAndroid Build Coastguard Worker 11*fb1b10abSAndroid Build Coastguard Worker #ifndef VPX_VP8_DECODER_TREEREADER_H_ 12*fb1b10abSAndroid Build Coastguard Worker #define VPX_VP8_DECODER_TREEREADER_H_ 13*fb1b10abSAndroid Build Coastguard Worker 14*fb1b10abSAndroid Build Coastguard Worker #include "./vpx_config.h" 15*fb1b10abSAndroid Build Coastguard Worker #include "vp8/common/treecoder.h" 16*fb1b10abSAndroid Build Coastguard Worker #include "dboolhuff.h" 17*fb1b10abSAndroid Build Coastguard Worker 18*fb1b10abSAndroid Build Coastguard Worker #ifdef __cplusplus 19*fb1b10abSAndroid Build Coastguard Worker extern "C" { 20*fb1b10abSAndroid Build Coastguard Worker #endif 21*fb1b10abSAndroid Build Coastguard Worker 22*fb1b10abSAndroid Build Coastguard Worker typedef BOOL_DECODER vp8_reader; 23*fb1b10abSAndroid Build Coastguard Worker 24*fb1b10abSAndroid Build Coastguard Worker #define vp8_read vp8dx_decode_bool 25*fb1b10abSAndroid Build Coastguard Worker #define vp8_read_literal vp8_decode_value 26*fb1b10abSAndroid Build Coastguard Worker #define vp8_read_bit(R) vp8_read(R, vp8_prob_half) 27*fb1b10abSAndroid Build Coastguard Worker 28*fb1b10abSAndroid Build Coastguard Worker /* Intent of tree data structure is to make decoding trivial. */ 29*fb1b10abSAndroid Build Coastguard Worker vp8_treed_read(vp8_reader * const r,vp8_tree t,const vp8_prob * const p)30*fb1b10abSAndroid Build Coastguard Workerstatic INLINE int vp8_treed_read( 31*fb1b10abSAndroid Build Coastguard Worker vp8_reader *const r, /* !!! must return a 0 or 1 !!! */ 32*fb1b10abSAndroid Build Coastguard Worker vp8_tree t, const vp8_prob *const p) { 33*fb1b10abSAndroid Build Coastguard Worker vp8_tree_index i = 0; 34*fb1b10abSAndroid Build Coastguard Worker 35*fb1b10abSAndroid Build Coastguard Worker while ((i = t[i + vp8_read(r, p[i >> 1])]) > 0) { 36*fb1b10abSAndroid Build Coastguard Worker } 37*fb1b10abSAndroid Build Coastguard Worker 38*fb1b10abSAndroid Build Coastguard Worker return -i; 39*fb1b10abSAndroid Build Coastguard Worker } 40*fb1b10abSAndroid Build Coastguard Worker 41*fb1b10abSAndroid Build Coastguard Worker #ifdef __cplusplus 42*fb1b10abSAndroid Build Coastguard Worker } // extern "C" 43*fb1b10abSAndroid Build Coastguard Worker #endif 44*fb1b10abSAndroid Build Coastguard Worker 45*fb1b10abSAndroid Build Coastguard Worker #endif // VPX_VP8_DECODER_TREEREADER_H_ 46