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1 /*
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2 * libmad - MPEG audio decoder library
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3 * Copyright (C) 2000-2004 Underbit Technologies, Inc.
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4 *
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5 * This program is free software; you can redistribute it and/or modify
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6 * it under the terms of the GNU General Public License as published by
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7 * the Free Software Foundation; either version 2 of the License, or
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8 * (at your option) any later version.
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9 *
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10 * This program is distributed in the hope that it will be useful,
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11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 * GNU General Public License for more details.
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14 *
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15 * You should have received a copy of the GNU General Public License
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16 * along with this program; if not, write to the Free Software
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17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18 *
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19 * $Id: bit.h,v 1.12 2004/01/23 09:41:32 rob Exp $
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20 */
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21
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22 # ifndef LIBMAD_BIT_H
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23 # define LIBMAD_BIT_H
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24
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25 struct mad_bitptr {
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26 unsigned char const *byte;
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27 unsigned short cache;
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28 unsigned short left;
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29 };
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30
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31 void mad_bit_init(struct mad_bitptr *, unsigned char const *);
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32
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33 # define mad_bit_finish(bitptr) /* nothing */
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34
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35 unsigned int mad_bit_length(struct mad_bitptr const *,
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36 struct mad_bitptr const *);
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37
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38 # define mad_bit_bitsleft(bitptr) ((bitptr)->left)
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39 unsigned char const *mad_bit_nextbyte(struct mad_bitptr const *);
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40
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41 void mad_bit_skip(struct mad_bitptr *, unsigned int);
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42 unsigned long mad_bit_read(struct mad_bitptr *, unsigned int);
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43 void mad_bit_write(struct mad_bitptr *, unsigned int, unsigned long);
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44
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45 unsigned short mad_bit_crc(struct mad_bitptr, unsigned int, unsigned short);
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46
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47 # endif
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