/*
    libmad - MPEG audio decoder library
    Copyright (C) 2000-2004 Underbit Technologies, Inc.

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    $Id: huffman.h,v 1.11 2004/01/23 09:41:32 rob Exp $
*/

# ifndef LIBMAD_HUFFMAN_H
# define LIBMAD_HUFFMAN_H

// Use ints instead of bitfields. This'll make the structure way larger, but allow
// for easy direct access w/o any helper functions when placed in PROGMEM

union huffquad {
    struct {
        unsigned int final;
        unsigned int bits;
        unsigned int offset;
    } ptr;
    struct {
        unsigned int final;
        unsigned int hlen;
        unsigned int v;
        unsigned int w;
        unsigned int x;
        unsigned int y;
    } value;
    unsigned int final ;
};

union huffpair {
    struct {
        unsigned int final;
        unsigned int bits;
        unsigned int offset;
    } ptr;
    struct {
        unsigned int final;
        unsigned int hlen;
        unsigned int x;
        unsigned int y;
    } value;
    unsigned int final;
};

struct hufftable {
    union huffpair const *table;
    unsigned int linbits;
    unsigned int startbits;
};

extern union huffquad const *const mad_huff_quad_table[2];
extern struct hufftable const mad_huff_pair_table[32];

# endif
