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# bit.h

    00001 /*
    00002  * libmad - MPEG audio decoder library
    00003  * Copyright (C) 2000-2003 Underbit Technologies, Inc.
    00004  *
    00005  * This program is free software; you can redistribute it and/or modify
    00006  * it under the terms of the GNU General Public License as published by
    00007  * the Free Software Foundation; either version 2 of the License, or
    00008  * (at your option) any later version.
    00009  *
    00010  * This program is distributed in the hope that it will be useful,
    00011  * but WITHOUT ANY WARRANTY; without even the implied warranty of
    00012  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    00013  * GNU General Public License for more details.
    00014  *
    00015  * You should have received a copy of the GNU General Public License
    00016  * along with this program; if not, write to the Free Software
    00017  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
    00018  *
    00019  * $Id: bit.h,v 1.1 2003/08/31 18:59:46 gabest Exp $
    00020  */
    00021
    00022 # ifndef LIBMAD_BIT_H
    00023 # define LIBMAD_BIT_H
    00024
    00025 struct mad_bitptr {
    00026   unsigned char const *byte;
    00027   unsigned short cache;
    00028   unsigned short left;
    00029 };
    00030
    00031 void mad_bit_init(struct mad_bitptr *, unsigned char const *);
    00032
    00033 # define mad_bit_finish(bitptr)         /* nothing */
    00034
    00035 unsigned int mad_bit_length(struct mad_bitptr const *,
    00036                             struct mad_bitptr const *);
    00037
    00038 # define mad_bit_bitsleft(bitptr)  ((bitptr)->left)
    00039 unsigned char const *mad_bit_nextbyte(struct mad_bitptr const *);
    00040
    00041 void mad_bit_skip(struct mad_bitptr *, unsigned int);
    00042 unsigned long mad_bit_read(struct mad_bitptr *, unsigned int);
    00043 void mad_bit_write(struct mad_bitptr *, unsigned int, unsigned long);
    00044
    00045 unsigned short mad_bit_crc(struct mad_bitptr, unsigned int, unsigned short);
    00046
    00047 # endif