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encoder.h
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C/C++ Source or Header
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1999-05-31
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6KB
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175 lines
/**********************************************************************
* ISO MPEG Audio Subgroup Software Simulation Group (1996)
* ISO 13818-3 MPEG-2 Audio Encoder - Lower Sampling Frequency Extension
*
* $Id: encoder.h,v 1.1 1996/02/14 04:04:23 rowlands Exp $
*
* $Log: encoder.h,v $
* Revision 1.1 1996/02/14 04:04:23 rowlands
* Initial revision
*
* Received from Mike Coleman
**********************************************************************/
#ifndef ENCODER_DOT_H
#define ENCODER_DOT_H
/***********************************************************************
*
* Encoder Include Files
*
***********************************************************************/
/***********************************************************************
*
* Encoder Definitions
*
***********************************************************************/
/* General Definitions */
/* Default Input Arguments (for command line control) */
#define DFLT_LAY 3 /* default encoding layer is III */
#define DFLT_MOD 'j' /* default mode is stereo */
#define DFLT_PSY 2 /* default psych model is 2 */
#define DFLT_SFQ 44.1 /* default input sampling rate is 44.1 kHz */
#define DFLT_EMP 'n' /* default de-emphasis is none */
#define DFLT_EXT ".mp3" /* default output file extension */
#define FILETYPE_ENCODE 'TEXT'
#define CREATOR_ENCODE 'MpgD'
/* This is the smallest MNR a subband can have before it is counted
as 'noisy' by the logic which chooses the number of JS subbands */
#define NOISY_MIN_MNR 0.0
/* Psychoacoustic Model 2 Definitions */
#define LOGBLKSIZE 10
#define BLKSIZE 1024
#define HBLKSIZE 513
#define CBANDS 63
#define LXMIN 32.0
/***********************************************************************
*
* Encoder Type Definitions
*
***********************************************************************/
/* Psychoacoustic Model 2 Type Definitions */
typedef int ICB[CBANDS];
typedef int IHBLK[HBLKSIZE];
typedef FLOAT F32[32];
typedef FLOAT F2_32[2][32];
typedef FLOAT FCB[CBANDS];
typedef FLOAT FCBCB[CBANDS][CBANDS];
typedef FLOAT FBLK[BLKSIZE];
typedef FLOAT FHBLK[HBLKSIZE];
typedef FLOAT F2HBLK[2][HBLKSIZE];
typedef FLOAT F22HBLK[2][2][HBLKSIZE];
typedef double DCB[CBANDS];
extern int iswav;
/***********************************************************************
*
* Encoder Function Prototype Declarations
*
***********************************************************************/
/* The following functions are in the file "musicin.c" */
#ifdef PROTO_ARGS
extern void obtain_parameters(frame_params*, int*, unsigned long*,
char[MAX_NAME_SIZE], char[MAX_NAME_SIZE]);
extern void parse_args(int, char**, frame_params*, int*, unsigned long*,
char[MAX_NAME_SIZE], char[MAX_NAME_SIZE]);
extern void print_config(frame_params*, int*,
char[MAX_NAME_SIZE], char[MAX_NAME_SIZE]);
extern void aiff_check(char*, IFF_AIFF*, int*);
#else
extern void obtain_parameters();
extern void parse_args();
extern void print_config();
extern void aiff_check();
#endif
/* The following functions are in the file "encode.c" */
#ifdef PROTO_ARGS
extern unsigned long read_samples(FILE*, short[2304], unsigned long,
unsigned long);
#if 0
/*
extern unsigned long get_audio(FILE*, short[2][1152], unsigned long,
int, int);
*/
extern unsigned long get_audio(FILE*, short [1152],short [1152], unsigned long,
int, int);
#else
extern unsigned long get_audio(FILE*, short[2][1152], unsigned long,
int, layer* info);
#endif
extern void read_ana_window(double[HAN_SIZE]);
extern void window_subband(short**, double[HAN_SIZE], int);
extern void create_ana_filter(double[SBLIMIT][64]);
extern void filter_subband(double[HAN_SIZE], double[SBLIMIT]);
extern void encode_info(frame_params*, Bit_stream_struc*);
extern double mod(double);
extern void pick_scale(unsigned int[2][3][SBLIMIT], frame_params*,
double[2][SBLIMIT]);
extern void put_scale(unsigned int[2][3][SBLIMIT], frame_params*,
double[2][SBLIMIT]);
#else
extern unsigned long read_samples();
extern unsigned long get_audio();
extern void read_ana_window();
extern void window_subband();
extern void create_ana_filter();
extern void filter_subband();
extern void encode_info();
extern double mod();
extern void pick_scale();
extern void put_scale();
#endif
/* The following functions are in the file "tonal.c" */
#ifdef PROTO_ARGS
extern void make_map(mask[HAN_SIZE], g_thres*);
extern double add_db(double, double);
extern void noise_label(mask*, int*, g_thres*);
extern void subsampling(mask[HAN_SIZE], g_thres*, int*, int*);
extern void threshold(mask[HAN_SIZE], g_thres*, int*, int*, int);
#else
extern void make_map();
extern double add_db();
extern void noise_label();
extern void subsampling();
extern void threshold();
#endif
/* The following functions are in the file "psy.c" */
#ifdef PROTO_ARGS
extern void psycho_anal(short int*, short int[1056], int, int,
FLOAT[32], double);
#else
extern void psycho_anal();
#endif
/* The following functions are in the file "subs.c" */
#ifdef PROTO_ARGS
extern void fft(FLOAT[BLKSIZE], FLOAT[BLKSIZE],
FLOAT[BLKSIZE], int );
extern double fft_side( FLOAT in[2][1024], int s);
#else
extern void fft();
extern double fft_side();
#endif
#endif