l3side.h

功能非常完善的MP3编译码器,输入文件WAV或AIFF,能够方便的嵌入到你自己的系统当中.

/*
			(c) Copyright 1998, 1999 - Tord Jansson
			=======================================

		This file is part of the BladeEnc MP3 Encoder, based on
		ISO's reference code for MPEG Layer 3 compression, and might
		contain smaller or larger sections that are directly taken
		from ISO's reference code.

		All changes to the ISO reference code herein are either
		copyrighted by Tord Jansson ([e-mail])
		or sublicensed to Tord Jansson by a third party.

	BladeEnc is free software; you can redistribute this file
	and/or modify it under the terms of the GNU Lesser General Public
	License as published by the Free Software Foundation; either
	version 2.1 of the License, or (at your option) any later version.

*/



/**********************************************************************
 * ISO MPEG Audio Subgroup Software Simulation Group (1996)
 * ISO 13818-3 MPEG-2 Audio Encoder - Lower Sampling Frequency Extension
 *
 * $Id: l3side.h,v 1.1 1996/02/14 04:04:23 rowlands Exp $
 *
 * $Log: l3side.h,v $
 * Revision 1.1  1996/02/14 04:04:23  rowlands
 * Initial revision
 *
 * Received from Mike Coleman
 **********************************************************************/
/**********************************************************************
 *   date   programmers                comment                        *
 * 25. 6.92  Toshiyuki Ishino          Ver 1.0                        *
 * 29.10.92  Masahiro Iwadare          Ver 2.0                        *
 * 17. 4.93  Masahiro Iwadare          Updated for IS Modification    *
 *                                                                    *
 *********************************************************************/

#ifndef L3_SIDE_H
#define L3_SIDE_H

/* Layer III side information. */

/* #define CBLIMIT_SHORT 12 */

void l3deco();

typedef double	D576[576];
typedef int	I576[576];
typedef double	D192_3[192][3];
typedef int	I192_3[192][3];
typedef	char	C192_3[192][3];

typedef struct {
	unsigned cbl_max;
	unsigned cbs_start;
} III_cb_info;


typedef struct {
	double	l[2][2][21];
	double	s[2][2][12][3];
} III_psy_ratio;

typedef struct {
	double	l[2][2][21];
	double	s[2][2][12][3];
} III_psy_xmin;

typedef struct {
	double	xr[576];
	double	xr_s[3][192];
	double	xmin[21];
	double	xmin_s[3][192];
	int	ix[576];
	int	ix_s[3][192];
	} III_input3; /* ch */

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

	unsigned part2_length;
	unsigned sfb_lmax;
	unsigned sfb_smax;
	unsigned address1;
	unsigned address2;
	unsigned address3;
	double quantizerStepSize;
	/* added for LSF */
	unsigned *sfb_partition_table;
	unsigned slen[4];
} gr_info;

typedef struct {
	int main_data_begin; /* unsigned -> int */
	unsigned private_bits;
	int resvDrain;
	unsigned scfsi[2][4];
	struct {
		struct gr_info_s {
			gr_info tt;
			} ch[2];
		} gr[2];
	} III_side_info_t;

/* Layer III scale factors. */

typedef struct {
	int l[2][2][22];            /* [cb] */
	int s[2][2][13][3];         /* [window][cb] */
	} III_scalefac_t;  /* [gr][ch] */

#endif