mpegsub.h

mp3解码源代码

/****************************************************************************/

/*
 *	mpegsub.h -- MPEG Audio Common layers Sub routines definitions
 *
 *	Author  :   St閜hane TAVENARD
 *
 *	(C) Copyright 1997-1998 St閜hane TAVENARD
 *	    All Rights Reserved
 *	
 *	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., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

/****************************************************************************/
#ifndef MPEGSUB_H
#define MPEGSUB_H
/****************************************************************************/

#include "mpegtab.h"

typedef struct {
	MPEGAUD_FRACT_TYPE	bb[MPA_MAX_CHANNELS][2 * MPA_HANNING_SIZE];
	MPEGTAB_DEW_TYPE	scaled_dewindow[MPA_HANNING_SIZE];
#ifdef MPEGAUD_INT
	INT32	scaled_shift;
#endif
	INT32	scale_percent;
	INT16	b_offset[ MPA_MAX_CHANNELS ];
	INT16	freq_div;
	INT16	quality;
	INT16	w_begin;
	INT16	w_width;
	INT16	pcm_count;
} MPEGSUB;


extern int	MPEGSUB_reset(MPEGSUB *mpegsub);
extern MPEGSUB	*MPEGSUB_open(INT16 freq_div, INT16 quality);
extern void	MPEGSUB_close(MPEGSUB *mpegsub);
extern INT16	MPEGSUB_synthesis(MPEGSUB *mpegsub,
			MPEGAUD_FRACT_TYPE *band_ptr,
			INT16 channel, INT16 *samples);
extern int	MPEGSUB_scale(MPEGSUB *mpegsub, INT32 scale_percent);

/****************************************************************************/
#endif /* MPEGSUB_H */