1/* 2 * copyright (c) 2004 Michael Niedermayer <michaelni@gmx.at> 3 * 4 * This file is part of FFmpeg. 5 * 6 * FFmpeg is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2.1 of the License, or (at your option) any later version. 10 * 11 * FFmpeg is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with FFmpeg; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 19 */ 20 21#ifndef AVCODEC_UNARY_H 22#define AVCODEC_UNARY_H 23 24#include "get_bits.h" 25 26/** 27 * Get unary code of limited length 28 * @param gb GetBitContext 29 * @param[in] stop The bitstop value (unary code of 1's or 0's) 30 * @param[in] len Maximum length 31 * @return Unary length/index 32 */ 33static inline int get_unary(GetBitContext *gb, int stop, int len) 34{ 35 int i; 36 37 for(i = 0; i < len && get_bits1(gb) != stop; i++); 38 return i; 39} 40 41/** 42 * Get unary code terminated by a 0 with a maximum length of 33 43 * @param gb GetBitContext 44 * @return Unary length/index 45 */ 46static inline int get_unary_0_33(GetBitContext *gb) 47{ 48 return get_unary(gb, 0, 33); 49} 50 51static inline int get_unary_0_9(GetBitContext *gb) 52{ 53 return get_unary(gb, 0, 9); 54} 55 56#endif /* AVCODEC_UNARY_H */ 57