144 lines
4.4 KiB
C
144 lines
4.4 KiB
C
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/*****************************************************************************
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*
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* This program is free software ; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* $Id: vlc.h 287 2005-10-07 17:49:26Z picard $
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*
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* The Core Pocket Media Player
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* Copyright (c) 2004-2005 Gabor Kovacs
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*
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****************************************************************************/
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#ifndef __VLC_H
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#define __VLC_H
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typedef uint16_t vlc;
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// item: code[32] bits[16] value[16]
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DLL bool_t vlcinit(vlc**, int* size, const void* code, bool_t code32, const uint16_t* data, int num, int escape, int bits);
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DLL void vlcdone(vlc**,int* size);
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#define vlcget2_pos(code, table, stream, bitpos, tmp, mask, bits) \
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{ \
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bitload_pos(stream,bitpos); \
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code = table[bitshow_pos(stream,bitpos,bits)]; \
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tmp = code >> 12; \
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if (tmp >= 12) \
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{ \
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bitflush_pos(stream,bitpos,bits); \
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bitload_pos(stream,bitpos); \
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tmp = (code >> 10) & 15; \
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code = (code & 1023) << 3; \
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\
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code = table[code+bitshow_pos(stream,bitpos,tmp)];\
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assert((code >> 12) < 12); \
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tmp = code >> 12; \
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} \
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\
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bitflush_pos(stream,bitpos,tmp); \
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code &= mask; \
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}
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#define vlcget3_pos(code, table, stream, bitpos, tmp, mask, bits) \
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{ \
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bitload_pos(stream,bitpos); \
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code = table[bitshow_pos(stream,bitpos,bits)]; \
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tmp = code >> 12; \
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if (tmp >= 12) \
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{ \
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const vlc *_table; \
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bitflush_pos(stream,bitpos,bits); \
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bitload_pos(stream,bitpos); \
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tmp = (code >> 10) & 15; \
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_table = table; \
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_table += (code & 1023) << 3; \
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\
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code = _table[bitshow_pos(stream,bitpos,tmp)];\
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if ((code >> 12) >= 12) \
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{ \
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bitflush_pos(stream,bitpos,tmp); \
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bitload_pos(stream,bitpos); \
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tmp = (code >> 10) & 15; \
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_table += (code & 1023) << 3; \
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\
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code = _table[bitshow_pos(stream,bitpos,tmp)];\
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assert((code >> 12) < 12); \
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} \
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tmp = code >> 12; \
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} \
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\
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bitflush_pos(stream,bitpos,tmp); \
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code &= mask; \
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}
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#define DECLARE_VLCGET3(BITS) \
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static int vlcget3(const vlc* p, bitstream* stream) \
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{ \
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int n,code; \
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int bits = BITS; \
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\
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code = p[bitshow(stream,bits)]; \
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n = code >> 12; \
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if (n >= 12) \
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{ \
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bitflush(stream,bits); \
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bits = (code >> 10) & 15; \
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p += (code & 1023) << 3; \
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\
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code = p[bitshow(stream,bits)]; \
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n = code >> 12; \
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if (n >= 12) \
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{ \
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bitflush(stream,bits); \
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bits = (code >> 10) & 15; \
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p += (code & 1023) << 3; \
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\
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bitload(stream); \
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\
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code = p[bitshow(stream,bits)]; \
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n = code >> 12; \
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assert(n < 12); \
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} \
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} \
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\
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bitflush(stream,n); \
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return code & 0xFFF; \
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}
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#define DECLARE_VLCGET2(BITS) \
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static int vlcget2(const vlc* p, bitstream* stream) \
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{ \
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int n,code; \
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int bits = BITS; \
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\
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code = p[bitshow(stream,bits)]; \
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n = code >> 12; \
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if (n >= 12) \
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{ \
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bitflush(stream,bits); \
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bits = (code >> 10) & 15; \
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p += (code & 1023) << 3; \
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\
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code = p[bitshow(stream,bits)]; \
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n = code >> 12; \
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assert(n < 12); \
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} \
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\
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bitflush(stream,n); \
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return code & 0xFFF; \
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}
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#endif
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