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/*************************************************************************** *
* MPEG Layer3-Audio Decoder
* © 1997-2006 by Fraunhofer IIS
* All Rights Reserved
*
* filename: mpeg.h
* project : ISO/MPEG-Decoder
* author : Markus Werner, addings: Martin Sieler
* date : 1995-07-07
* contents/description: HEADER - iso/mpeg-definitions
*
*
\***************************************************************************/
/*
* $Date: 2011/01/20 22:14:40 $
* $Id: mpeg.h,v 1.3 2011/01/20 22:14:40 audiodsp Exp $
*/
/*-------------------------------------------------------------------------*/
#ifndef __MPEG_H__
#define __MPEG_H__
#include "foundation/align.h"
/* ------------------------ includes --------------------------------------*/
/* ------------------------------------------------------------------------*/
//
// MPEG ID (fhgVersion)
//
#define MPG_MPEG1 1
#define MPG_MPEG2 0
#define MPG_MPEG25 2
/* ------------------------------------------------------------------------*/
//
// sample rate
//
#define MPG_SF_LOW 2
/* ------------------------------------------------------------------------*/
//
// header-mode field
//
#define MPG_MD_STEREO 0
#define MPG_MD_JOINT_STEREO 1
#define MPG_MD_DUAL_CHANNEL 2
#define MPG_MD_MONO 3
/*-------------------------------------------------------------------------*/
//
// channels
//
#define MONO 1
#define STEREO 2
/* ------------------------------------------------------------------------*/
//
// subbands, samples/subband
//
#define SBLIMIT 32
#define SSLIMIT 18
/* ------------------------------------------------------------------------*/
//
// info structure
//
typedef struct
{
int stereo;
int sample_rate_ndx;
int frame_bits;
int mode;
int mode_ext;
int header_size;
int fhgVersion;
int protection;
bool IsMpeg1;
} MPEG_INFO;
/* ------------------------------------------------------------------------*/
//
// MPEG Layer-3 sideinfo (per channel/granule)
//
typedef struct
{
int part2_3_length;
int big_values;
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;
// additional calced values
int intensity_scale; // MPEG 2, MPEG 2.5 only
int zeroStartNdx;
int zeroSfbStartNdxIsLong;
int zeroSfbStartNdxL;
int zeroSfbStartNdxSMax;
int zeroSfbStartNdxS[3];
int zeroSbStartNdx;
} MP3SI_GRCH;
/* ------------------------------------------------------------------------*/
//
// MPEG Layer-3 sideinfo
//
typedef struct
{
int main_data_begin;
int private_bits;
struct
{
int scfsi[4];
MP3SI_GRCH gr[2];
} ch[2];
} MP3SI;
/* ------------------------------------------------------------------------*/
//
// MPEG Layer-3 scalefactors
//
typedef struct
{
// scalefactors
int l[23];
int s[3][13];
// illegal intensity position
int l_iip[23];
int s_iip[13];
} MP3SCF;
/* ------------------------------------------------------------------------*/
//
// spectrum (as transmitted)
//
typedef NALIGN(16) float SPECTRUM[2][SBLIMIT][SSLIMIT];
//
// spectrum (after mdct)
//
typedef NALIGN(16) float POLYSPECTRUM[2][SSLIMIT][SBLIMIT];
/* Nullsoft added 25 Oct 2007 */
struct DecoderHooks
{
void (*layer3_vis)(SPECTRUM vistable,int gr, int nch);
void (*layer2_eq)(float *xr, int nch, int srate, int nparts);
void (*layer3_eq)(float *xr, int nch, int srate);
};
/* ------------------------------------------------------------------------*/
#endif
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