l3bitstream.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: l3bitstream.h,v 1.1 1996/02/14 04:04:23 rowlands Exp $
 *
 * $Log: l3bitstream.h,v $
 * Revision 1.1  1996/02/14 04:04:23  rowlands
 * Initial revision
 *
 * Received from Mike Coleman
 **********************************************************************/

#ifndef L3_BITSTREAM_H
#define L3_BITSTREAM_H


#include "common.h"
#include "encoder.h"

void III_format_bitstream( int              bitsPerFrame,
			   frame_params     *in_fr_ps,
			   int              l3_enc[2][2][576],
                           III_side_info_t  *l3_side,
			   III_scalefac_t   *scalefac,
			   double           (*xr)[2][576],
			   char             *ancillary,
			   int              anc_bits );

int HuffmanCode( int table_select, int x, int y, unsigned *code, unsigned int *extword, int *codebits, int *extbits );
int	HuffmanCode_tj( int table_select, int x, int y );



void III_FlushBitstream();

int abs_and_sign( int *x ); /* returns signx and changes *x to abs(*x) */


void	fixStatic_l3bitstream();

#endif