Plan 9 from Bell Labs’s /usr/web/sources/plan9/sys/src/games/mp3enc/l3side.h

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Distributed under the MIT License.
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/*
 *	Layer 3 side include file
 *
 *	Copyright (c) 1999 Mark Taylor
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

#ifndef LAME_L3SIDE_H
#define LAME_L3SIDE_H

#include "encoder.h"
#include "machine.h"

/* Layer III side information. */

typedef FLOAT8	D576[576];
typedef int	I576[576];
typedef FLOAT8	D192_3[192][3];
typedef int	I192_3[192][3];


typedef struct 
{
   int l[1+SBMAX_l];
   int s[1+SBMAX_s];
} scalefac_struct;


typedef struct {
	FLOAT8	l[SBMAX_l];
	FLOAT8	s[SBMAX_s][3];
} III_psy_xmin;

typedef struct {
    III_psy_xmin thm;
    III_psy_xmin en;
} III_psy_ratio;

typedef struct {
	int part2_3_length;
	int big_values;
	int count1;
 	int global_gain;
	int scalefac_compress;
	int window_switching_flag;
	int block_type;
	int mixed_block_flag;
	int table_select[3];
	 int subblock_gain[3];
	 int region0_count;
	 int region1_count;
	 int preflag;
	 int scalefac_scale;
	 int count1table_select;

	 int part2_length;
	 int sfb_lmax;
	 int sfb_smin;
	 int count1bits;
	/* added for LSF */
	 const int *sfb_partition_table;
	 int slen[4];
} gr_info;

typedef struct {
	int main_data_begin; 
	int private_bits;
	int resvDrain_pre;
	int resvDrain_post;
	int scfsi[2][4];
	struct {
		struct gr_info_ss {
			gr_info tt;
			} ch[2];
		} gr[2];
	} III_side_info_t;

/* Layer III scale factors. */
/* note: there are only SBPSY_l=(SBMAX_l-1) and SBPSY_s=(SBMAX_s-1) scalefactors.
 * Dont know why these would be dimensioned SBMAX_l and SBMAX-s */
typedef struct {
	int l[SBMAX_l];            /* [cb] */
	int s[SBMAX_s][3];         /* [window][cb] */
} III_scalefac_t;  /* [gr][ch] */

#endif

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