vlc_codes.h

mpeg4代码,比较具体

/*****************************************************************************
 *
 *  XVID MPEG-4 VIDEO CODEC
 *  - Variable Length Coding tables -
 *
 *  Copyright(C) 2002 Michael Militzer <[e-mail]>
 *
 *  This file is part of XviD, a free MPEG-4 video encoder/decoder
 *
 *  XviD 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
 *
 *  Under section 8 of the GNU General Public License, the copyright
 *  holders of XVID explicitly forbid distribution in the following
 *  countries:
 *
 *    - Japan
 *    - United States of America
 *
 *  Linking XviD statically or dynamically with other modules is making a
 *  combined work based on XviD.  Thus, the terms and conditions of the
 *  GNU General Public License cover the whole combination.
 *
 *  As a special exception, the copyright holders of XviD give you
 *  permission to link XviD with independent modules that communicate with
 *  XviD solely through the VFW1.1 and DShow interfaces, regardless of the
 *  license terms of these independent modules, and to copy and distribute
 *  the resulting combined work under terms of your choice, provided that
 *  every copy of the combined work is accompanied by a complete copy of
 *  the source code of XviD (the version of XviD used to produce the
 *  combined work), being distributed under the terms of the GNU General
 *  Public License plus this exception.  An independent module is a module
 *  which is not derived from or based on XviD.
 *
 *  Note that people who make modified versions of XviD are not obligated
 *  to grant this special exception for their modified versions; it is
 *  their choice whether to do so.  The GNU General Public License gives
 *  permission to release a modified version without this exception; this
 *  exception also makes it possible to release a modified version which
 *  carries forward this exception.
 *
 * $Id: vlc_codes.h,v 1.14.2.1 2003/07/28 14:04:22 edgomez Exp $
 *
 ****************************************************************************/

#ifndef _VLC_CODES_H_
#define _VLC_CODES_H_

#include "../portab.h"
#include "mbcoding.h"

#define VLC_ERROR	(-1)

#define ESCAPE  3
#define ESCAPE1 6
#define ESCAPE2 14
#define ESCAPE3 15

/*****************************************************************************
 * The Vector Length Coding structure
 ****************************************************************************/

typedef struct
{
	uint32_t code;
	uint8_t len;
}
VLC;

typedef struct
{
	uint8_t last;
	uint8_t run;
	int8_t level;
}
EVENT;

typedef struct
{
	uint8_t len;
	EVENT event;
}
REVERSE_EVENT;

typedef struct
{
	VLC vlc;
	EVENT event;
}
VLC_TABLE;


/*****************************************************************************
 * common tables between encoder/decoder
 ****************************************************************************/

static VLC_TABLE const coeff_tab[2][102] =
{
	/* intra = 0 */
	{
		{{ 2,  2}, {0, 0, 1}},
		{{15,  4}, {0, 0, 2}},
		{{21,  6}, {0, 0, 3}},
		{{23,  7}, {0, 0, 4}},
		{{31,  8}, {0, 0, 5}},
		{{37,  9}, {0, 0, 6}},
		{{36,  9}, {0, 0, 7}},
		{{33, 10}, {0, 0, 8}},
		{{32, 10}, {0, 0, 9}},
		{{ 7, 11}, {0, 0, 10}},
		{{ 6, 11}, {0, 0, 11}},
		{{32, 11}, {0, 0, 12}},
		{{ 6,  3}, {0, 1, 1}},
		{{20,  6}, {0, 1, 2}},
		{{30,  8}, {0, 1, 3}},
		{{15, 10}, {0, 1, 4}},
		{{33, 11}, {0, 1, 5}},
		{{80, 12}, {0, 1, 6}},
		{{14,  4}, {0, 2, 1}},
		{{29,  8}, {0, 2, 2}},
		{{14, 10}, {0, 2, 3}},
		{{81, 12}, {0, 2, 4}},
		{{13,  5}, {0, 3, 1}},
		{{35,  9}, {0, 3, 2}},
		{{13, 10}, {0, 3, 3}},
		{{12,  5}, {0, 4, 1}},
		{{34,  9}, {0, 4, 2}},
		{{82, 12}, {0, 4, 3}},
		{{11,  5}, {0, 5, 1}},
		{{12, 10}, {0, 5, 2}},
		{{83, 12}, {0, 5, 3}},
		{{19,  6}, {0, 6, 1}},
		{{11, 10}, {0, 6, 2}},
		{{84, 12}, {0, 6, 3}},
		{{18,  6}, {0, 7, 1}},
		{{10, 10}, {0, 7, 2}},
		{{17,  6}, {0, 8, 1}},
		{{ 9, 10}, {0, 8, 2}},
		{{16,  6}, {0, 9, 1}},
		{{ 8, 10}, {0, 9, 2}},
		{{22,  7}, {0, 10, 1}},
		{{85, 12}, {0, 10, 2}},
		{{21,  7}, {0, 11, 1}},
		{{20,  7}, {0, 12, 1}},
		{{28,  8}, {0, 13, 1}},
		{{27,  8}, {0, 14, 1}},
		{{33,  9}, {0, 15, 1}},
		{{32,  9}, {0, 16, 1}},
		{{31,  9}, {0, 17, 1}},
		{{30,  9}, {0, 18, 1}},
		{{29,  9}, {0, 19, 1}},
		{{28,  9}, {0, 20, 1}},
		{{27,  9}, {0, 21, 1}},
		{{26,  9}, {0, 22, 1}},
		{{34, 11}, {0, 23, 1}},
		{{35, 11}, {0, 24, 1}},
		{{86, 12}, {0, 25, 1}},
		{{87, 12}, {0, 26, 1}},
		{{ 7,  4}, {1, 0, 1}},
		{{25,  9}, {1, 0, 2}},
		{{ 5, 11}, {1, 0, 3}},
		{{15,  6}, {1, 1, 1}},
		{{ 4, 11}, {1, 1, 2}},
		{{14,  6}, {1, 2, 1}},
		{{13,  6}, {1, 3, 1}},
		{{12,  6}, {1, 4, 1}},
		{{19,  7}, {1, 5, 1}},
		{{18,  7}, {1, 6, 1}},
		{{17,  7}, {1, 7, 1}},
		{{16,  7}, {1, 8, 1}},
		{{26,  8}, {1, 9, 1}},
		{{25,  8}, {1, 10, 1}},
		{{24,  8}, {1, 11, 1}},
		{{23,  8}, {1, 12, 1}},
		{{22,  8}, {1, 13, 1}},
		{{21,  8}, {1, 14, 1}},
		{{20,  8}, {1, 15, 1}},
		{{19,  8}, {1, 16, 1}},
		{{24,  9}, {1, 17, 1}},
		{{23,  9}, {1, 18, 1}},
		{{22,  9}, {1, 19, 1}},
		{{21,  9}, {1, 20, 1}},
		{{20,  9}, {1, 21, 1}},
		{{19,  9}, {1, 22, 1}},
		{{18,  9}, {1, 23, 1}},
		{{17,  9}, {1, 24, 1}},
		{{ 7, 10}, {1, 25, 1}},
		{{ 6, 10}, {1, 26, 1}},
		{{ 5, 10}, {1, 27, 1}},
		{{ 4, 10}, {1, 28, 1}},
		{{36, 11}, {1, 29, 1}},
		{{37, 11}, {1, 30, 1}},
		{{38, 11}, {1, 31, 1}},
		{{39, 11}, {1, 32, 1}},
		{{88, 12}, {1, 33, 1}},
		{{89, 12}, {1, 34, 1}},
		{{90, 12}, {1, 35, 1}},
		{{91, 12}, {1, 36, 1}},
		{{92, 12}, {1, 37, 1}},
		{{93, 12}, {1, 38, 1}},
		{{94, 12}, {1, 39, 1}},
		{{95, 12}, {1, 40, 1}}
	},
	/* intra = 1 */
	{
		{{ 2,  2}, {0, 0, 1}},
		{{15,  4}, {0, 0, 3}},
		{{21,  6}, {0, 0, 6}},
		{{23,  7}, {0, 0, 9}},
		{{31,  8}, {0, 0, 10}},
		{{37,  9}, {0, 0, 13}},
		{{36,  9}, {0, 0, 14}},
		{{33, 10}, {0, 0, 17}},
		{{32, 10}, {0, 0, 18}},
		{{ 7, 11}, {0, 0, 21}},
		{{ 6, 11}, {0, 0, 22}},
		{{32, 11}, {0, 0, 23}},
		{{ 6,  3}, {0, 0, 2}},
		{{20,  6}, {0, 1, 2}},
		{{30,  8}, {0, 0, 11}},
		{{15, 10}, {0, 0, 19}},
		{{33, 11}, {0, 0, 24}},
		{{80, 12}, {0, 0, 25}},
		{{14,  4}, {0, 1, 1}},
		{{29,  8}, {0, 0, 12}},
		{{14, 10}, {0, 0, 20}},
		{{81, 12}, {0, 0, 26}},
		{{13,  5}, {0, 0, 4}},
		{{35,  9}, {0, 0, 15}},
		{{13, 10}, {0, 1, 7}},
		{{12,  5}, {0, 0, 5}},
		{{34,  9}, {0, 4, 2}},
		{{82, 12}, {0, 0, 27}},
		{{11,  5}, {0, 2, 1}},
		{{12, 10}, {0, 2, 4}},
		{{83, 12}, {0, 1, 9}},
		{{19,  6}, {0, 0, 7}},
		{{11, 10}, {0, 3, 4}},
		{{84, 12}, {0, 6, 3}},
		{{18,  6}, {0, 0, 8}},
		{{10, 10}, {0, 4, 3}},
		{{17,  6}, {0, 3, 1}},
		{{ 9, 10}, {0, 8, 2}},
		{{16,  6}, {0, 4, 1}},
		{{ 8, 10}, {0, 5, 3}},
		{{22,  7}, {0, 1, 3}},
		{{85, 12}, {0, 1, 10}},
		{{21,  7}, {0, 2, 2}},
		{{20,  7}, {0, 7, 1}},
		{{28,  8}, {0, 1, 4}},
		{{27,  8}, {0, 3, 2}},
		{{33,  9}, {0, 0, 16}},
		{{32,  9}, {0, 1, 5}},
		{{31,  9}, {0, 1, 6}},
		{{30,  9}, {0, 2, 3}},
		{{29,  9}, {0, 3, 3}},
		{{28,  9}, {0, 5, 2}},
		{{27,  9}, {0, 6, 2}},
		{{26,  9}, {0, 7, 2}},
		{{34, 11}, {0, 1, 8}},
		{{35, 11}, {0, 9, 2}},
		{{86, 12}, {0, 2, 5}},
		{{87, 12}, {0, 7, 3}},
		{{ 7,  4}, {1, 0, 1}},
		{{25,  9}, {0, 11, 1}},
		{{ 5, 11}, {1, 0, 6}},
		{{15,  6}, {1, 1, 1}},
		{{ 4, 11}, {1, 0, 7}},
		{{14,  6}, {1, 2, 1}},
		{{13,  6}, {0, 5, 1}},
		{{12,  6}, {1, 0, 2}},
		{{19,  7}, {1, 5, 1}},
		{{18,  7}, {0, 6, 1}},
		{{17,  7}, {1, 3, 1}},
		{{16,  7}, {1, 4, 1}},
		{{26,  8}, {1, 9, 1}},
		{{25,  8}, {0, 8, 1}},
		{{24,  8}, {0, 9, 1}},
		{{23,  8}, {0, 10, 1}},
		{{22,  8}, {1, 0, 3}},
		{{21,  8}, {1, 6, 1}},
		{{20,  8}, {1, 7, 1}},
		{{19,  8}, {1, 8, 1}},
		{{24,  9}, {0, 12, 1}},
		{{23,  9}, {1, 0, 4}},
		{{22,  9}, {1, 1, 2}},